Systems and programs, etc.

Abstract

This technology provides a way to notify users of the presence of light-emitting devices that emit light of a specific wavelength. [Solution] The electronic device 10 is a system installed in a vehicle. The electronic device 10 includes a light receiving unit that selects and receives light of a specific wavelength from the incident light and outputs a signal according to the amount of light received, and a control unit that performs a first notification control to notify the presence of a light-emitting device that emits light of the specific wavelength based on the signal output by the light receiving unit.

Description

Technical Field

[0001] The present invention relates to systems, programs, etc.

Background Art

[0002] There are various systems for measuring the speed of a vehicle traveling on a road. In the case of a radar system, a speed measurement device installed along the road emits microwaves in a predetermined frequency band toward the vehicle, receives the reflected wave from the vehicle, and measures the traveling speed of the vehicle.

[0003] For a user such as a vehicle driver, it may be useful to be able to grasp in advance the presence of a speed measurement device. Patent Documents 1 and 2 disclose an electronic device that receives microwaves emitted from a vehicle speed measurement device and outputs an alarm when it detects the presence of the vehicle speed measurement device.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The moving speed of an object can also be measured using light. In the case of this optical method, a light emitting device emits light toward the object, receives the reflected wave from the object, and measures the moving speed. Even when such an optical speed measurement device is installed, it is desirable to be able to notify the user of its presence. One object of the present invention is to provide a technique for notifying a user of the presence of a light emitting device that emits light of a specific wavelength.

[0006] The purpose of the present invention is not limited thereto, and the applicant intends to obtain rights through divisional applications, amendments, etc., for configurations that aim to obtain the effects derived from the components disclosed in this specification and the drawings. For example, problems that can be described as "can be achieved" in this specification are disclosed here if they are reinterpreted as "the problem is...". Each problem is described independently, and the applicant intends to obtain rights to each configuration for solving each problem individually through divisional applications, amendments, etc. Even if a problem is implicitly understood from the description in the specification, the applicant intends to include a part of the configuration described in this specification in the claims through amendment or divisional application. Furthermore, configurations that solve problems by combining these independent problems are also disclosed, and the applicant intends to obtain rights to them. [Means for solving the problem]

[0007] (1) A system for notifying the presence of a device installed in a vehicle that detects the presence of the vehicle by emitting light of a specific wavelength, comprising a focusing lens including an incident surface having an aspherical curved surface and an exit surface from which light incident on the incident surface is emitted, and a light-receiving element that receives light emitted from the exit surface, A system is provided which includes a control unit that performs control to notify the presence of the light-emitting device based on the light of a specific wavelength received by the light-receiving element.

[0008] In this way, a technology can be provided to notify the user of the presence of a light-emitting device that emits light of a specific wavelength. In particular, by using a focusing lens with an incident surface having an aspherical curved surface, the light-receiving element can receive light arriving from a wide range of directions in a predetermined direction, thus enabling more reliable notification of the presence of a light-emitting device.

[0009] The light-emitting device should emit light whose energy is distributed in a wavelength range narrower than that of ambient light. Ambient light should be light other than the light to be received. The specific wavelength should be the wavelength at which the energy of the light emitted by the light-emitting device peaks. The specific wavelength should be a wavelength that is not perceptible to humans, for example, having energy at a specific wavelength outside the visible light range. The specific wavelength should be, for example, 905 nm, belonging to the infrared light range. The specific wavelength is not limited to this and may be 850 nm, 950 nm, 1900 nm, or other wavelengths. The wavelength different from the specific wavelength should be a wavelength different from the wavelength at which the energy of the light emitted by the light-emitting device peaks. The wavelength different from the specific wavelength should be a wavelength included in the visible light range. The amount of light received should indicate the amount of light of the specific wavelength selected and received by the light-receiving unit. Selecting a wavelength means choosing some wavelengths from a certain wavelength range and excluding at least some other wavelengths. Notification-based control refers to control that notifies information in a manner that the user can recognize.

[0010] (2) The incident surface may include a convex curved surface along the width direction of the vehicle.

[0011] In this way, the light-receiving element can receive light arriving from a wide range of directions in the width direction of the vehicle, thus more reliably indicating the presence of the light-emitting device.

[0012] (3) The incident surface is preferably such that the length in the width direction of the vehicle is greater than the length in the height direction of the vehicle.

[0013] In this way, the light-receiving element can receive light arriving from a wide range of directions in the width direction of the vehicle, thus more reliably indicating the presence of the light-emitting device.

[0014] (4) The incident surface may include a convex curved surface along the width direction of the vehicle and the height direction of the vehicle.

[0015] In this way, since the light-receiving element can receive light coming from a wide range of directions, the presence of the light-emitting device can be more reliably notified.

[0016] (5) The incident surface may preferably include a convex curved surface along the width direction of the vehicle and a flat curved surface along the height direction of the vehicle.

[0017] In this way, since the light-receiving element can receive light coming from a wide range in the width direction of the vehicle, the presence of the light-emitting device can be more reliably notified.

[0018] (6) The emission surface may preferably include a flat surface.

[0019] In this way, since the light-receiving element can receive light coming from a wide range in the width direction of the vehicle, the presence of the light-emitting device can be more reliably notified.

[0020] (7) The light-receiving element may be arranged at a position closer to the condenser lens than the focal length position of the condenser lens.

[0021] In this way, by arranging the light-receiving element at a position closer to the condenser lens than the focal length position, light with a wide incident angle can be received.

[0022] (8) When the pulse width of the light received by the light-receiving unit is within a certain range from the reference pulse width, the control unit may perform control to notify the presence of the device.

[0023] Referring to the width of the pulse of the received light may be useful in detecting a light-emitting device that emits specific pulsed light. In this way, it is possible to reduce the notification misidentifying ambient light as light from the light-emitting device. [[ID=3{3]]

[0024] (9) When pulsed light with a pulse width of 20 ms is received, the control unit may perform control to notify the presence of the light-emitting device.

[0025] By doing so, it is possible to notify the presence of a light-emitting device that measures the speed of a vehicle and conducts law enforcement.

[0026] (10) When the pulse interval of the light received by the light-receiving unit is within a certain range from the reference pulse interval, the control unit may perform control to notify the presence of the device.

[0027] Referring to the pulse interval of the received light may be useful for detecting a light-emitting device that emits specific pulsed light. By doing so, it is possible to reduce notifications misidentifying ambient light as light from the light-emitting device.

[0028] (11) When pulsed light with a pulse interval of 80 ms is received, the control unit may perform control to notify the presence of the light-emitting device.

[0029] By doing so, it is possible to notify the presence of a light-emitting device that measures the speed of a vehicle and conducts law enforcement.

[0030] (12) The control unit may change the notification level according to at least either the pulse width or the pulse interval of the light received by the light-receiving unit.

[0031] By doing so, the user can understand the importance of the notification content.

[0032] (13) When pulsed light of the light with the specific wavelength is received at least once, the control unit may perform control to notify the presence of the light-emitting device.

[0033] By doing so, the user can immediately understand that the fermentation device exists.

[0034] (14) It is preferable to have a reflection part that reflects at least a part of the light emitted from the condenser lens in the direction of the light-receiving element.

[0035] In this way, the amount of light received by the light-receiving element from the light-emitting device increases, making it possible to more reliably signal the presence of the light-emitting device.

[0036] (15) The reflective portion is provided at a position different from the optical path from the lens to the light-receiving element, and may include a reflective surface that reflects at least a portion of the light emitted from the lens toward the light-receiving element.

[0037] In this way, the amount of light received by the light-receiving element from the light-emitting device increases, making it possible to more reliably signal the presence of the light-emitting device.

[0038] (16) The reflective surface is preferably arranged so as to surround the optical path.

[0039] In this way, the amount of light received by the light-receiving element from the light-emitting device increases, making it possible to more reliably signal the presence of the light-emitting device.

[0040] (17) The reflective portion may be provided on the optical path from the lens to the light-receiving element and may include a member that utilizes total internal reflection of light to reflect at least a portion of the light emitted from the lens toward the light-receiving element.

[0041] In this way, the amount of light received by the light-receiving element from the light-emitting device increases, making it possible to more reliably signal the presence of the light-emitting device.

[0042] (18) The control unit may have an amplifier that amplifies a signal corresponding to the amount of light received from the light-receiving element, and a differential amplifier that outputs a signal corresponding to the difference between the level of the amplified signal and a threshold level, and the control unit may perform control to notify the presence of the light-emitting device based on the signal corresponding to the difference.

[0043] In this way, the amount of light received by the light-receiving element from the light-emitting device is amplified, making it possible to more reliably signal the presence of the light-emitting device.

[0044] (19) The control unit may perform control to change the threshold level.

[0045] In this way, the possibility that control systems that notify the presence of a light-emitting device may fail due to the influence of ambient light or electromagnetic noise can be reduced.

[0046] (20) The control unit may set the threshold level to be at least above the level of light emitted by the equipment installed in the vehicle.

[0047] In this way, the possibility that control systems that notify the presence of a light-emitting device may fail due to the influence of light emitted by equipment installed on the vehicle can be reduced.

[0048] (21) The substrate has a first surface on the side of the light-gathering lens and a second surface facing the first surface, the light-receiving element is provided on the second surface side of the substrate, and the substrate is provided with a light-transmitting portion for guiding light from the first surface side to the light-receiving element.

[0049] In this way, the substrate is positioned between the light-receiving element and the light-receiving element lens, allowing for effective use of the space corresponding to the focal length and reducing the overall thickness of the housing.

[0050] Furthermore, the present invention may be defined as follows. (A) A system is provided for installation in a vehicle, comprising: a light receiving unit that selects and receives light of a specific wavelength from incident light and outputs a signal corresponding to the amount of light received; and a control unit that performs a first notification control to notify the presence of a light-emitting device that emits light of the specific wavelength based on the signal output by the light receiving unit.

[0051] In this way, it is possible to provide a technology that notifies users of the presence of light-emitting devices that emit light of a specific wavelength.

[0052] The light-emitting device should emit light whose energy is distributed in a wavelength range narrower than that of ambient light. Ambient light should be light other than the light to be received. The specific wavelength should be the wavelength at which the energy of the light emitted by the light-emitting device peaks. The specific wavelength should be a wavelength that is not perceptible to humans, for example, having energy at a specific wavelength outside the visible light range. The specific wavelength should be, for example, 905 nm, belonging to the infrared light range. The specific wavelength is not limited to this and may be 850 nm, 950 nm, 1900 nm, or other wavelengths. The wavelength different from the specific wavelength should be a wavelength different from the wavelength at which the energy of the light emitted by the light-emitting device peaks. The wavelength different from the specific wavelength should be a wavelength included in the visible light range. The amount of light received should indicate the amount of light of the specific wavelength selected and received by the light-receiving unit. Selecting a wavelength means choosing some wavelengths from a certain wavelength range and excluding at least some other wavelengths. Notification control refers to a type of control that notifies information in a manner that the user can recognize.

[0053] (B) The control unit may be a system that performs the first notification control, which displays an animated image including an image that mimics the light-emitting device.

[0054] This makes it easier for users to recognize the presence of a light-emitting device when a vehicle is approaching.

[0055] (C) The control unit may be a system that performs the first notification control, which displays at least one of the attributes of the light-emitting device and the status of the vehicle, in addition to the animation image.

[0056] In this way, the user can also be made aware of at least one of the attributes of the light-emitting device and the status of the vehicle.

[0057] (D) The control unit may be configured to perform a second notification control different from the first notification control when the position of the vehicle has a predetermined relationship with the position of the light-emitting device.

[0058] In this way, the system can make the user aware of whether they are approaching a light-emitting device that is the source of light of a specific wavelength that the system has received, or a light-emitting device that is identified based on the vehicle's position.

[0059] (E) The system includes a radio wave receiving unit that receives a predetermined radio wave, and the control unit performs a third notification control to notify the presence of the radio wave generating device in response to the reception of the predetermined radio wave, and stops the third notification control during the period in which the first notification control is being performed.

[0060] In this way, when notifying the presence of a light-emitting device of a specific wavelength, the presence of a radio wave-generating device can be avoided.

[0061] (F) The control unit may be a system that performs the third notification control, which displays an animated image including an image that mimics the generator.

[0062] This method makes it easier for users to recognize the presence of a radio wave emitting device when a vehicle is approaching.

[0063] (G) The control unit may perform a fourth notification control according to the positional relationship between the vehicle and other vehicles, and the system may perform the fourth notification control in parallel with the first notification control.

[0064] In some cases, there is a high priority for broadcasting information that is relevant to the relative positions of one's own vehicle and other vehicles. When this need arises, the system can broadcast information relevant to the relative positions of one's own vehicle and other vehicles, even if one's own vehicle is approaching the light-emitting device.

[0065] (H) The control unit may be configured to stop the first notification control when the vehicle's speed is below a predetermined speed.

[0066] This prevents unnecessary notifications from being issued when the vehicle's speed is below the specified speed.

[0067] (I) The control unit may perform the first notification control even if the vehicle's speed is less than the predetermined speed, if the vehicle's position satisfies predetermined conditions.

[0068] In this way, depending on the vehicle's position, if the presence of a light-emitting device should be indicated even if the vehicle's speed is below a predetermined speed, this indication can be provided.

[0069] (K) The control unit may perform a fifth notification control to notify the status of the occupants of the vehicle based on images from a camera that captures the interior of the vehicle, and may stop the fifth notification control during the period in which the first notification control is being performed.

[0070] In this way, when notifying the presence of a light-emitting device of a specific wavelength, the status of the vehicle's occupants can be avoided.

[0071] (L) The system may have a housing having a light-transmitting portion that transmits at least the light of the specified wavelength, and the light-receiving portion is located inside the housing and receives the light of the specified wavelength from the light that is incident through the light-transmitting portion.

[0072] In this way, a light-receiving unit housed within the enclosure can be used to receive light of a specific wavelength.

[0073] (M) The light receiving unit comprises a first filter facing the light transmitting unit, a first light receiving element that receives light that has passed through the first filter, a second filter facing the light transmitting unit, and a second light receiving element that receives light that has passed through the second filter, and the housing may be a system having a first window corresponding to the first light receiving element and a second window corresponding to the second light receiving element.

[0074] In this way, the presence of a light-emitting device can be indicated by a configuration using at least two sets of light-receiving elements housed in the enclosure.

[0075] (N) The first and second photodetectors are housed in a shield case made of a conductive material, and the system is such that the space in which the first photodetector is housed and the space in which the second photodetector is housed are separated by a partition wall.

[0076] In this way, the signal output by the photodetector becomes less susceptible to electromagnetic noise compared to when it is not shielded with conductive material.

[0077] (O) A system comprising: a display unit for displaying an image; a first board on which a control circuit that performs some or all of the functions of the control unit and a radio wave receiving unit for receiving predetermined radio waves are mounted, facing the display unit; and a second board on which a light receiving unit and a GNSS (Global Navigation Satellite System) receiving unit provided adjacent to the light receiving unit are mounted, wherein at least a portion of the radio wave receiving unit is mounted on the side of the first board facing the second board, and the second board has a cutout in the region where at least a portion of the radio wave receiving unit is located.

[0078] This approach helps to minimize the increase in the system's thickness.

[0079] (P) The control unit controls the output of sound from the speaker, and the speaker is provided adjacent to the GNSS receiving unit. The speaker and the GNSS receiving unit are positioned above the radio wave receiving unit.

[0080] This approach helps to minimize the increase in the system's thickness.

[0081] (Q) The second substrate may have a first region and a second region that is shorter in the vertical direction than the first region and protrudes upward from the first region, with the light receiving unit mounted in the first region and the GNSS receiving unit mounted in the second region.

[0082] This approach helps to minimize the increase in the system's thickness.

[0083] (R) The system comprises a circuit board on which the light-receiving unit is mounted, an antenna unit for receiving predetermined radio waves, and a processing circuit for processing signals from the antenna, wherein the antenna unit is positioned adjacent to the circuit board, and the normal direction of the antenna unit intersects with the normal direction of the circuit board.

[0084] In this way, it is possible to provide a technology that notifies users of the presence of a light-emitting device while minimizing changes from the existing system.

[0085] (S) The control unit may be a system that performs control to notify the presence of a light-emitting device that emits light of a specific wavelength when it recognizes a predetermined pattern of reflective material.

[0086] In this way, the presence of a light-emitting device can be reported in locations where it is highly likely to be present, and the possibility of false alarms can be reduced.

[0087] (T) A program is provided for a computer to implement the functions of the control unit of any of the above systems.

[0088] In this way, it is possible to provide a technology that notifies users of the presence of light-emitting devices that emit light of a specific wavelength.

[0089] The inventions described in (1) to (20) and (A) to (T) above can be combined in any way. For example, one could combine all or part of the configuration of the invention described in (1) with at least part of the configuration of at least one of the inventions described in (2) and onward. In particular, one could combine the invention described in (1) with at least part of the configuration of at least one of the inventions described in (2) and onward. Alternatively, one could extract any configuration from the inventions described in (1) to (20) and (A) to (T) and combine the extracted configurations. The applicant of this application intends to obtain rights to inventions that include these configurations. Furthermore, even if there are descriptions such as "in the case of..." or "when...", these are not meant to indicate that the configuration is limited to that case or time. These are merely examples of better configurations, and the applicant intends to obtain rights to configurations that do not fall under these cases or times. Also, even if there is a sequence of descriptions, the order is not limited to that sequence. Configurations with some parts deleted or the order rearranged are also disclosed, and the applicant intends to obtain rights to them as well. [Effects of the Invention]

[0090] According to the present invention, the presence of a light-emitting device that emits light of a specific wavelength can be notified to the user.

[0091] The effects of the present invention are not limited thereto, and the effects produced by the components of the structure disclosed in this specification and the drawings are also disclosed. The present invention intends to obtain rights to the components that produce such effects through divisional applications, amendments, etc. For example, the phrases "can do..." in this specification are descriptions that specify the effects produced, and there are components that produce effects even without such descriptions. Furthermore, there are effects that can be grasped by the component even without such descriptions. [Brief explanation of the drawing]

[0092] [Figure 1] This is a diagram showing the configuration of the electronic device according to the first embodiment. [Figure 2] This figure shows an example of the waveform of pulsed light emitted by the speed measuring device according to the first embodiment. [Figure 3] This is a rear view of the electronic device according to the first embodiment. [Figure 4] This is a cross-sectional view of the electronic device according to the first embodiment. [Figure 5] This is a cross-sectional view of the electronic device according to the first embodiment. [Figure 6] This figure illustrates an example of the schematic characteristics of the first wavelength selector and the second wavelength selector according to the first embodiment. [Figure 7] This is a block diagram showing the electrical configuration of the electronic device according to the first embodiment. [Figure 8] This is a flowchart showing the operation of the electronic device according to the first embodiment. [Figure 9] This figure shows an example of a display screen for an electronic device according to the first embodiment. [Figure 10] This figure shows an example of a display screen for an electronic device according to the first embodiment. [Figure 11] This figure shows an example of a display screen for an electronic device according to the first embodiment. [Figure 12] This figure shows an example of a display screen for an electronic device according to the first embodiment. [Figure 13] This is a flowchart showing the operation of the electronic device according to the first embodiment. [Figure 14] This figure shows an example of a display screen for an electronic device according to the first embodiment. [Figure 15] This figure shows an example of the waveform of pulsed light received by an electronic device according to a modified example of the first embodiment. [Figure 16] This figure shows an example of a display screen for an electronic device according to a modified example of the first embodiment. [Figure 17] This figure explains why the number of pulses in the pulsed light received by the electronic device according to a modified example of the first embodiment decreases. [Figure 18] This is a flowchart showing the operation of an electronic device according to a modified example of the first embodiment. [Figure 19] This diagram illustrates the overview of the system according to the second embodiment. [Figure 20]This is a flowchart showing the operation of the electronic device according to the second embodiment. [Figure 21] This figure shows an example of a display screen for an electronic device according to the second embodiment. [Figure 22] This is a block diagram showing the system configuration according to the third embodiment. [Figure 23] This figure illustrates an example of the schematic characteristics of the first wavelength selector and the second wavelength selector according to the third embodiment. [Figure 24] This is a block diagram showing an example of the arrangement of the light receiving unit in the system according to the third embodiment. [Figure 25] This figure shows an example of the circuit configuration of the light-receiving unit according to one modified example. [Figure 26] This is a six-view drawing showing an example of the external configuration of an electronic device. [Figure 27] This figure shows an example of a notification screen displayed when pulse light is received from a mobile speed measuring device for electronic equipment in another embodiment. [Figure 28] This figure shows an example of an animated image displayed in the information display area TA2. [Figure 29] This figure shows an example of an animation image following Figure 28. [Figure 30] This figure shows an example of a notification screen displayed when pulse light is received from a mobile speed measuring device for electronic equipment in another embodiment. [Figure 31] This figure shows an example of an animated image displayed in the information display area TA3. [Figure 32] This figure shows an example of an animation image following Figure 31. [Figure 33] This figure shows an example of a notification screen when a micro-type speed measuring device for electronic equipment is detected in another embodiment. [Figure 34] This figure shows an example of an animated image displayed in the information display area TA5. [Figure 35] This figure shows an example of an animation image following Figure 34. [Figure 36]This figure shows the relationship between the received microwave and the notification method in another embodiment. [Figure 37] This figure shows the relationship between the detection method and notification method of a speed measuring device in another embodiment. [Figure 38] This figure shows an example of a notification screen related to collision warning in another embodiment. [Figure 39] This diagram illustrates warnings related to distracted or drowsy driving in other embodiments. [Figure 40] This figure shows an example of a notification screen related to a warning about distracted or drowsy driving in another embodiment. [Figure 41] This figure shows an example of a notification screen related to a warning about distracted or drowsy driving in another embodiment. [Figure 42] This figure illustrates GPS warnings in other embodiments. [Figure 43] This table illustrates the notification control of electronic devices in other embodiments. [Figure 44] This figure shows the notification screen when pulse light is received from a mobile speed measuring device for electronic equipment in another embodiment. [Figure 45] This figure shows the notification screen when a radar-type speed measuring device of an electronic device is detected in another embodiment. [Figure 46] This figure shows the notification timing and notification method in other embodiments. [Figure 47] This figure shows the notification timing and notification method in other embodiments. [Figure 48] This figure shows the notification timing and notification method in other embodiments. [Figure 49] This is a perspective view showing an example of the external configuration of an electronic device in another embodiment. [Figure 50] This is a six-view drawing showing an example of the external configuration of an electronic device in another embodiment. [Figure 51] This is a six-view drawing showing an example of the external configuration of an electronic device in another embodiment. [Figure 52]This is a rear view of the electronic device with the cover removed, as in another embodiment. [Figure 53] This is an exploded perspective view of an electronic device in another embodiment. [Figure 54] This is a rear view showing the electronic device in another embodiment with the second housing removed. [Figure 55] This is a perspective view showing the internal configuration of an electronic device in another embodiment. [Figure 56] This is a perspective view showing the internal configuration of an electronic device in another embodiment. [Figure 57] This is a perspective view showing the internal configuration of an electronic device in another embodiment. [Figure 58] This figure shows a photograph of the second substrate in another embodiment. [Figure 59] This figure shows an example of the configuration of the light-receiving unit in another embodiment. [Figure 60] This figure shows an example of filter characteristics in another embodiment. [Figure 61] This diagram shows the configuration after removing the second circuit board of the electronic device. [Figure 62] This is a perspective view showing the external configuration of an electronic device, which is another example in another embodiment. [Figure 63] This is a perspective view showing the external configuration of an electronic device, which is another embodiment. [Figure 64] This is a perspective view showing the internal configuration of an electronic device, which is another embodiment of the device. [Figure 65] This is a perspective view showing the internal configuration of an electronic device, which is another embodiment of the device. [Figure 66] This is a perspective view showing the internal configuration of an electronic device, which is another embodiment of the device. [Figure 67] This figure illustrates another embodiment: a method for reducing noise in electronic equipment. [Figure 68] This is a diagram illustrating another embodiment. [Figure 69] This is a diagram illustrating another embodiment. [Figure 70] This is a diagram illustrating another embodiment. [Figure 71] This is a diagram illustrating another embodiment. [Figure 72] This diagram shows the configuration of the electronic device of this embodiment as viewed from the upper right side of the rear. [Figure 73] This is a six-view drawing showing an example of the external configuration of the electronic device according to this embodiment. [Figure 74] This figure shows the electronic device of this embodiment with the second housing removed. [Figure 75] This figure shows the electronic device of this embodiment with the lens removed. [Figure 76] This figure shows the electronic device of this embodiment with the filter and shielding plate removed. [Figure 77] This is a version of Figure 76 with the circuit board removed. [Figure 78] This is a six-view drawing showing an example of the lens configuration of this embodiment. [Figure 79] A diagram illustrating an experiment to confirm that an aspherical lens can receive light at a wide angle of incidence. [Figure 80] This figure shows an example of the electrical configuration of the light-receiving section of this embodiment. [Figure 81] This figure shows an example of a configuration in which a reflective part is applied to the electronic device of this embodiment. [Figure 82] This figure shows an example of a configuration in which a reflective part is applied to the electronic device of this embodiment. [Figure 83] This diagram illustrates the light from the collision warning system that the electronic device of this embodiment receives. [Figure 84] This graph shows an example of the temporal change in the level of light received by the light-receiving unit. [Figure 85] This figure shows an example of the electrical configuration of the light-receiving section of this embodiment. [Figure 86] This diagram illustrates the method for setting thresholds in this embodiment. [Figure 87] This figure shows an example of a modified electrical configuration of the light-receiving section. [Figure 88]This diagram shows the configuration of the electronic device of this embodiment as viewed from the upper right side of the rear. [Figure 89] This is a six-view drawing showing an example of the external configuration of the electronic device according to this embodiment. [Figure 90] This is a six-view drawing showing an example of the external configuration of the electronic device according to this embodiment. [Figure 91] This is a diagram showing the internal configuration of the electronic device of this embodiment. [Figure 92] This is a diagram showing the internal configuration of the electronic device of this embodiment. [Figure 93] This is a diagram showing the internal configuration of the electronic device of this embodiment. [Figure 94] This figure shows the external configuration of the electronic device according to this embodiment. [Figure 95] This is a six-view drawing showing an example of the external configuration of the electronic device according to this embodiment. [Figure 96] This figure shows the electronic device of this embodiment with the second housing removed. [Figure 97] This figure shows the electronic device of this embodiment with the focusing lens removed. [Figure 98] This figure shows the electronic device of this embodiment with the first housing removed. [Figure 99] This figure shows how the electronic device of this embodiment is mounted on the dashboard using the first mounting member. [Figure 100] This figure shows the external configuration of the first mounting member of this embodiment. [Figure 101] This diagram illustrates a method for mounting electronic equipment using the first mounting member of this embodiment. [Figure 102] This figure shows how the electronic device of this embodiment is mounted by being suspended in mid-air using the second mounting member. [Figure 103] This figure shows the external configuration of the second mounting member of this embodiment. [Figure 104] This figure shows the external configuration of the second mounting member of this embodiment. [Figure 105] This figure shows the external configuration of the second mounting member of this embodiment. [Figure 106] This diagram illustrates a method for mounting electronic equipment using the second mounting member of this embodiment. [Figure 107] This figure shows how the electronic device of this embodiment is mounted by being suspended in mid-air using a mounting member. [Figure 108] This figure shows how the electronic device of this embodiment is mounted by being suspended in mid-air using a mounting member. [Figure 109] This figure shows how the electronic device of this embodiment is mounted by being suspended in mid-air using a mounting member. [Figure 110] This figure shows the external configuration of the mounting member of this embodiment. [Figure 111] This figure shows the external configuration of the mounting member in this embodiment. [Figure 112] This figure shows a side view of an electronic device attached to the windshield using the mounting member of this embodiment. [Figure 113] This figure shows the external configuration of the mounting member in this embodiment. [Figure 114] This is a six-view drawing showing the external configuration of the second mounting member of this embodiment. [Figure 115] This is a six-view drawing showing the external configuration of the mounting member of this embodiment. [Figure 116] This is a diagram illustrating the operation of the electronic device of this embodiment. [Figure 117] This is a diagram illustrating the operation of the electronic device of this embodiment. [Figure 118] This figure illustrates an example of the characteristics of the first wavelength selector and the second wavelength selector in a modified example. [Figure 119] This diagram shows the configuration of the light-receiving unit according to one modified example. [Figure 120] This diagram shows the control performed by the control unit in a modified example. [Modes for carrying out the invention]

[0093] The embodiments will be described in detail below with reference to the drawings. The embodiments shown below are examples of embodiments of the present disclosure, and the present disclosure is not limited to these embodiments. In the drawings referenced in these embodiments, the same or similar reference numerals (simply numbers followed by A, B, etc.) are used for the same parts or parts having similar functions, and repeated explanations may be omitted. Also, in the figures referenced in the following description, the scale may be different from the actual scale in order to make each component, each area, etc. recognizable. The following description will describe the case in which the system of the present disclosure is applied to a system mounted on a vehicle that detects a speed measuring device emitting light of a specific wavelength.

[0094] [1. First Embodiment] <1-1. Configuration of the First Embodiment> Figure 1 is a diagram showing the configuration of the system according to the first embodiment. Electronic device 10 is an electronic device to which the system according to this disclosure is applied. Electronic device 10 is a detector that supports optical and radar methods. Electronic device 10 targets the speed measuring device 30. The optical method is a method of detecting light emitted by the speed measuring device 30. In this embodiment, the light emitted by the speed measuring device 30 is pulsed light. More specifically, the light emitted by the speed measuring device 30 is a pulsed laser having a constant pulse width. In this case, the optical method can also be called the laser method. The radar method is a method of receiving predetermined radio waves emitted by a speed measuring device (not shown), which is a radio wave generator. In this embodiment, the predetermined radio waves are microwaves.

[0095] The electronic device 10 is a monitor-type device that is roughly rectangular in shape. The electronic device 10 is installed inside the vehicle 40. The electronic device 10 is installed on the dashboard 41, for example, using double-sided tape. The housing of the electronic device 10 is a housing 100. An opening is provided on the front of the housing 100. The electronic device 10 has a display unit 13 for displaying an image at the location of this opening. The housing 100 is made of resin or other material.

[0096] The speed measuring device 30 is installed at a vehicle speed enforcement point. The speed measuring device 30 may be either fixed or mobile, but it is preferable to be mobile. The mobile type includes, for example, a portable type and a type mounted on a vehicle. In the case of a mobile type, even if the location information of the speed enforcement point is not known, the electronic device 10 can detect the speed measuring device 30 by optical means. In the example in Figure 1, the speed measuring device 30 is installed on a sidewalk adjacent to the roadway and measures the speed of vehicles traveling on this roadway. The speed measuring device 30 measures the distance to vehicles within a predetermined distance (e.g., 70m) and further measures the speed of vehicles at a predetermined distance (e.g., 20m) closer to the device.

[0097] The speed measuring device 30 comprises a speed measuring unit 31, an imaging unit 32, and a strobe 33. The speed measuring unit 31 measures the speed of the vehicle using a laser scanning method. Specifically, when a pulsed light Lout reaches the vehicle 40 and is reflected, the speed measuring unit 31 receives the reflected light Lref. The speed measuring unit 31 measures the distance to the vehicle 40 based on the time taken from the emission of the pulsed light Lout to the reception of the reflected light Lref. The speed measuring unit 31 repeatedly measures the distance to the vehicle 40 and measures the speed of the vehicle 40 based on the distance traveled by the vehicle 40 in a unit of time.

[0098] The speed measuring unit 31 emits pulsed light Lout while changing direction within a sector-shaped range T with a central angle θ. θ is, for example, 110 degrees. Range T includes a wider area upstream of the vehicle 40's direction of travel than the position where the speed measuring device 30 is installed, compared to the area downstream. The speed measuring unit 31 changes the emission direction of the pulsed light Lout counterclockwise. For example, the speed measuring unit 31 emits pulsed light Lout in the direction of arrow D1, and then emits pulsed light Lout in the direction of arrow D2. The emission direction of the pulsed light Lout is, for example, approximately horizontal. The speed measuring unit 31 emits pulsed light to, for example, a mirror rotating at a constant speed. The pulsed light Lout is the pulsed light that is reflected by the mirror and emitted from the light-emitting window.

[0099] The pulsed light Lout has energy concentrated at a specific wavelength. The specific wavelength is preferably the wavelength at which the energy of the light emitted by the light-emitting device peaks. It is desirable that the pulsed light Lout has energy at a specific wavelength outside the visible light region, for example. The specific wavelength is often a wavelength imperceptible to humans, for example, by having energy at a specific wavelength outside the visible light region. The specific wavelength is, for example, 905 nm, belonging to the infrared light region. However, the specific wavelength is not limited to this and may be 850 nm, 950 nm, 1900 nm, or other wavelengths.

[0100] Figure 2 shows an example of the waveform of pulsed light Lout emitted from the speed measuring device 30. In this case, pulsed light Lout is a square wave. However, pulsed light Lout may be a sine wave, triangular wave, sawtooth wave, or other waveform. Pulsed light Lout is light that alternates between periods T1 and T2. Period T1 is the period during which pulsed light of a specific wavelength λout is emitted. During period T1, pulsed light Lout alternates between high level (H) and low level (L). Period T2 is the period during which light of this pulsed waveform is not emitted. As described above, the speed measuring device 30 emits pulsed light from a mirror that rotates at a constant speed, and this mirror emits pulsed light Lout that is reflected. Therefore, period T2 is the period during which the pulsed light from the mirror is not directed towards the light-emitting window of the speed measuring device 30.

[0101] The imaging unit 32 images the target vehicle when the speed measured by the speed measuring unit 31 is above a threshold. The imaging unit 32 is used to image vehicles that are speeding. The strobe 33 emits light when the imaging unit 32 is capturing an image. The imaging unit 32 should capture images based on light in the infrared region so that it can capture images even at night. In this case, the strobe 33 should emit light with energy in the infrared region. The speed measuring device 30 transmits data such as the measured speed and the captured image to an external computer.

[0102] Figure 3 is a rear view of the electronic device 10. As shown in Figure 3, a first window 101 and a second window 102 are formed on the rear of the housing 100. The first window 101 and the second window 102 are openings for guiding external light into the interior of the housing 100. The first window 101 and the second window 102 are arranged with a predetermined distance between them in the left-right direction. The first window 101 and the second window 102 are, for example, rectangular, but may have other shapes. A light-receiving unit 12 is provided inside the housing 100. The light-receiving unit 12 receives light incident through the first window 101 and the second window 102.

[0103] Figures 4 and 5 are cross-sectional views of the electronic device 10. Figure 4(a) is a cross-sectional view (section II in Figure 3) obtained when the electronic device 10 is cut along the vertical direction at a position including the first window 101. Figure 4(b) is a cross-sectional view (section II-II in Figure 3) obtained when the electronic device 10 is cut along the vertical direction at a position including the second window 102. Figure 5 is a cross-sectional view (section III-III in Figure 3) obtained when the electronic device 10 is cut along the horizontal direction at a position including the first window 101 and the second window 102. Figure 6 is a graph showing an example of the schematic characteristics of the wavelength selection section of the light receiving section 12, which will be described later. In Figure 6, the horizontal axis corresponds to wavelength and the vertical axis corresponds to transmittance.

[0104] As shown in Figures 4(a) and 4(b), a visible light cut filter 126 is provided in the first window 101. A visible light cut filter 127 is provided in the second window 102. The visible light cut filters 126 and 127 block at least some of the visible light. The visible light cut filters 126 and 127 transmit light of a specific wavelength λout. Blocking visible light should at least attenuate it. The visible light region is, for example, 400 to 700 nm. The presence of the visible light cut filters 126 and 127 makes it difficult to see the components housed inside the housing 100 from the outside. In addition, the presence of the visible light cut filters 126 and 127 can reduce the adverse effects of the light receiving unit 12 receiving strong visible light such as direct sunlight.

[0105] As shown in Figure 4(a), a first wavelength selector 121 and a first photodetector 122 are provided facing the first window 101. The first wavelength selector 121 selectively transmits light of a specific wavelength λout from the incident light. Selecting a wavelength can also be said to mean selecting some wavelengths from a certain wavelength range and not selecting at least some other wavelengths. In this case, the first wavelength selector 121 is a band-pass filter. As shown by the solid line in Figure 6, it transmits light of wavelengths including the specific wavelength λout, in this case the wavelength range from wavelength λ1a to wavelength λ1b, and blocks light of other wavelength ranges. Blocking light means at least attenuating that light, and the attenuation is greater for the wavelengths that are blocked than for the wavelengths that are transmitted. The characteristics of the first wavelength selector 121 are determined with the view that it transmits as much as possible only light of the same wavelength as the pulse light from the speed measuring device 30. The width of the wavelength range from wavelength λ1a to wavelength λ1b is, for example, 20 nm, but it is more desirable to have a narrower width.

[0106] In Figure 6, the transmittance in the frequency range where light is transmitted is represented as 100%, and the transmittance in the frequency range where light is blocked is represented as approximately 0%. However, any transmittance that is practically acceptable is sufficient. While it is desirable for the wavelength selector to exhibit a steep characteristic as illustrated in Figure 6, it may also exhibit a broader characteristic. For example, there may be wavelengths where the transmittance of both the first wavelength selector 121 and the second wavelength selector 123 is not 0%.

[0107] The first light-receiving element 122 receives light transmitted by the first wavelength selection unit 121 and outputs a first signal corresponding to the amount of light received, which is the first light-receiving amount. The first light-receiving element 122 is preferably a photodiode, for example, but may be a phototransistor or other light-receiving element. The first light-receiving element 122 is sensitive to at least the infrared light region. The first light-receiving element 122 includes, for example, a resin mold that transmits infrared light. It is preferable that the first light-receiving element 122 does not receive light in the wavelength region of 700 nm or less. The first light-receiving element 122 is a so-called lensless type light-receiving element that does not have a lens. This increases the light acceptance angle of the first light-receiving element 122 (for example, 120 to 180 degrees), making it possible to receive light from multiple directions. Alternatively, a combination of lenses or mirrors may be used to widen the light acceptance angle of the first light-receiving element 122.

[0108] As shown in Figure 4(b), a second wavelength selector 123 and a second light-receiving element 124 are provided facing the second window 102. The second wavelength selector 123 is a filter that selects and transmits light from the incident light in a wavelength range different from a specific wavelength λout. The wavelength different from the specific wavelength should be a wavelength different from the wavelength at which the energy of the light emitted by the light-emitting device peaks. The wavelength different from the specific wavelength should be a wavelength included in the visible light range. The second wavelength selector 123 is, for example, a band-elimination filter. As shown by the dashed line in Figure 6, the second wavelength selector 123 blocks light in the wavelength range including the specific wavelength λout, in this case, the wavelength range from wavelength λ2a to wavelength λ2b, and transmits light in the other wavelength ranges. The wavelength range from wavelength λ2a to wavelength λ2b does not include the specific wavelength λout, and it is desirable that it includes as broad a range of wavelengths other than the specific wavelength λout as possible. The characteristics of the second wavelength selector 123 are determined with the aim of transmitting only light of a different wavelength from the pulsed light Lout from the speed measuring device 30 as much as possible.

[0109] The second light-receiving element 124 receives light that has passed through the second wavelength selection unit 123 and outputs a second signal corresponding to the amount of light received, which is the second light-receiving amount. The second light-receiving element 124 is, for example, a photodiode, but it may also be a phototransistor or other light-receiving element. It is preferable that the second light-receiving element 124 has the same characteristics as the first light-receiving element 122, for example, the same product (for example, model number). This is because when the second light-receiving element 124 and the first light-receiving element 122 receive the same light, the first signal Sig1 and the second signal Sig2 will be the same signal. The second light-receiving element 124, like the first light-receiving element 122, is a so-called lensless type sensor that does not have a lens.

[0110] As shown in Figure 5, the housing 100 includes a light-blocking partition 103 between the first light-receiving element 122 and the second light-receiving element 124. It is desirable that the distance between the first light-receiving element 122 and the second light-receiving element 124 be as small as possible. This is to prevent a delay in the timing of light incidence between the first light-receiving element 122 and the second light-receiving element 124. Even in this case, the presence of the partition 103 reduces the possibility that light transmitted through the first wavelength selection unit 121 is received by the second light-receiving element 124, and that light transmitted through the second wavelength selection unit 123 is received by the first light-receiving element 122.

[0111] The light-receiving unit 12 is preferably shielded using a conductive material. This shield is, for example, made of a metallic case. This reduces the influence of electromagnetic noise on the electronic components inside the housing 100.

[0112] The first window 101, the second window 102, and the light receiving unit 12 may be positioned so as to face diagonally forward (for example, to the left front) with respect to the direction of travel of the vehicle 40 when the display unit 13 of the electronic device 10 is facing the driver's seat of the vehicle 40. This may make it easier for the light receiving unit 12 to receive pulse light Lout from the speed measuring device 30.

[0113] Figure 7 is a block diagram showing the electrical configuration of the electronic device 10. The control unit 11 controls each part of the electronic device 10. The control unit 11 is, for example, a computer including an arithmetic processing circuit and memory. The arithmetic processing circuit includes, for example, a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or other arithmetic processing circuits. The memory includes, for example, RAM (Random Access Memory) or other volatile memory. The arithmetic processing circuit performs various controls by temporarily reading data into memory and performing arithmetic processing.

[0114] The light-receiving unit 12 includes a first wavelength selection unit 121, a first light-receiving element 122, a second wavelength selection unit 123, a second light-receiving element 124, and an interface 125. The first wavelength selection unit 121, for example, selects a wavelength range from wavelength λ1a to wavelength λ1b from the incident light and transmits it as light Lin1. The first light-receiving element 122 receives light Lin1 and outputs a first signal Sig1 corresponding to the first light-receiving amount. The first light-receiving amount may indicate the amount of light of a specific wavelength selected and received by the light-receiving unit 12. The first signal Sig1 indicates the amount of light Lin1 received. The second wavelength selection unit 123 selects a wavelength range different from the wavelength range from wavelength λ2a to wavelength λ2b and transmits it as light Lin2. The second light-receiving element 124 receives light Lin2 and outputs a second signal Sig2 corresponding to the second light-receiving amount. The second received light quantity may indicate the amount of light at a wavelength different from the specific wavelength selected and received by the light receiving unit 12. The second signal Sig2 indicates the amount of light Lin2 received. The interface 125 processes the first signal Sig1 and the second signal Sig2 and outputs the processed signal to the control unit 11. For example, the interface 125 converts the first signal Sig1 and the second signal Sig2 into a digital format and outputs it.

[0115] The display unit 13 displays an image. The display unit 13 is, for example, a 3.2-inch color TFT liquid crystal display. However, the display unit 13 may be an organic EL display or other type of display device. The speaker 14 outputs sound. The microwave receiver 15 includes an antenna and a receiving circuit and receives microwaves. The GPS (Global Positioning System) receiver 16 includes an antenna and a receiving circuit and receives signals from GPS satellites. The GPS receiver 16 processes the received signals and outputs location information. The location information includes, for example, latitude and longitude information, and may also include altitude information. The communication unit 17 communicates with external devices. The communication unit 17 performs wireless communication, for example, Wi-Fi®, Bluetooth®, or other types of wireless communication.

[0116] The memory unit 18 stores data. For example, the memory unit 18 stores programs for the control unit 11 to perform various controls. The control unit 11 reads the programs from the memory unit 18 into memory and executes them. The memory unit 18 also stores map data showing maps, data indicating the types and locations of various facilities, data for notifying the presence of notification targets, and data for realizing route guidance functions. Objects that are subject to notification include, for example, locations of accidents caused by drowsy driving, speed measuring devices (radar type, loop coil type, H system, LH system, photoelectric tube type, mobile type, etc.), speed limit change points, enforcement areas, checkpoint areas, parking violation monitoring areas, N systems, traffic monitoring systems, intersection monitoring points, red light violation prevention systems, police stations, accident-prone areas, car break-in-prone areas, sharp / consecutive curves (expressways), branching / merging points (expressways), ETC lane advance notice (expressways), service areas (expressways), parking areas (expressways), highway oases (expressways), smart interchanges (expressways), gas stations within PA / SA (expressways), tunnels (expressways), highway radio reception areas (expressways), prefectural border notices, roadside stations, viewpoint parking areas, etc. The memory unit 18 stores the type information of these notification targets, location information indicating their location, image data (for example, a schematic diagram or photograph) to be displayed on the display unit 13, and audio data in association with each other.

[0117] The storage unit 18 may also include a storage medium for permanently storing data. The storage unit 18 may include, for example, an optical recording medium, a magnetic recording medium, a semiconductor recording medium, or other recording media.

[0118] The control unit 19 receives user input. The control unit 19 includes, for example, a touch sensor, volume control buttons, and operation buttons. The touch sensor is provided on the surface of the display unit 13 and detects the position touched by the user. The volume control buttons are operated to adjust the volume of sound output from the speaker 14. The operation buttons are for performing various tasks.

[0119] The sensor unit 20 includes various sensors. For example, the sensor unit 20 includes a geomagnetic sensor, an acceleration sensor, and an illuminance sensor. The geomagnetic sensor detects the Earth's magnetic field to determine which direction north is relative to the direction of travel. The acceleration sensor detects the acceleration of the vehicle in the forward, backward, left, right, and up and down directions. The illuminance sensor detects the illuminance, which indicates the brightness inside the vehicle.

[0120] The mounting section 21 is a mounting section into which an external storage medium is mounted. The external storage medium is, for example, a memory card. In this case, the mounting section 21 is a memory card slot. The data stored in the storage section 18 may be acquired via the external storage medium. This data may include updated information on new notification targets (location information such as longitude and latitude, type information, etc.).

[0121] The power supply unit 22 supplies power from the power source to each part of the electronic device 10. The power supply unit 22 includes, for example, a power switch and a DC jack. The DC jack is for connecting a cigarette lighter plug cord, which is connected to the vehicle's cigarette lighter socket to receive power. The power switch is a switch for turning the electronic device 10 on or off.

[0122] The light-emitting section 23 emits light in various colors. The light-emitting section 23 includes, for example, a light-emitting diode.

[0123] The cable terminal section 24 is a terminal to which an external connection cable is connected. For example, the connection cable is one that connects the electronic device 10 to the OBD-II connector installed in the vehicle. The OBD-II connector is also called a fault diagnosis connector and is connected to the vehicle's ECU (Engine Control Unit), and various vehicle information is output from it.

[0124] Furthermore, the electronic device 10 may also have functions that are commonly found in radar detectors, in addition to those mentioned above.

[0125] <1-2. Operation of the First Embodiment> Next, the operation of this embodiment will be described. <1-2-1. Notification by optical method> Figure 8 is a flowchart illustrating the operation of the control unit 11 of the electronic device 10. Figure 8 shows the operation when the speed measuring device 30 is detected by an optical method. When the electronic device 10 starts operating, the control unit 11 executes the processes described below. The trigger for starting the operation of the electronic device 10 is not particularly limited, but for example, it may be triggered when the power of the electronic device 10 is turned on or when the route guidance function is started.

[0126] The control unit 11 first starts displaying the map screen on the display unit 13 (step S1). The map screen is a screen that shows the vehicle's position on a map. The map displayed on the display unit 13 is determined based on map data and location information from the GPS receiver 16. The vehicle's position is determined based on location information from the GPS receiver 16. Figure 9 shows an example of the map screen. In the map screen shown in Figure 9, an icon I1 indicating the vehicle's position is placed on the map M. The map screen also displays the current address, the distance to a predetermined notification target (here, "1960m to H system"), the speed limit, and a photograph of the area around the speed enforcement point. Figure 10 shows another example of the map screen. In the map screen shown in Figure 10, an icon I1 indicating the vehicle's position is also placed on the map M. The following describes an example of control when the map screen shown in Figure 10 is displayed. The icon may be replaced with characters, symbols, shapes, or other objects.

[0127] Next, the control unit 11 acquires the first signal Sig1 and the second signal Sig2 from the light receiving unit 12 (step S2). Next, the control unit 11 calculates the difference between the first light received amount corresponding to the first signal Sig1 and the second light received amount corresponding to the second signal Sig2 (step S3). Next, the control unit 11 determines whether the calculated difference is greater than or equal to a threshold (step S4). If the difference is less than the threshold, the control unit 11 determines "NO" in step S4 and returns to the process in step S2. In this case, the control unit 11 does not detect the speed measuring device 30 and does not provide notification that the speed measuring device 30 is present.

[0128] On the other hand, if the calculated difference is greater than or equal to a threshold, the control unit 11 determines "YES" in step S4 and performs notification control (step S5). Notification control is a control that notifies the presence of the speed measuring device 30. Notification control can be described as a control that issues an alarm to make the user aware of what the speed measuring device is doing. In this case, notification control is a control that notifies the user of the presence of the speed measuring device 30 by the first method. Notification control includes, for example, control that displays a notification screen on the display unit 13.

[0129] Figure 11 shows an example of a notification screen. The notification screen shown in Figure 11 is a screen in which window W1 is overlaid on the map screen described above. Window W1 contains an icon M1 indicating the presence of the speed measuring device 30 and a message indicating the presence of the speed measuring device 30, which reads, "You are approaching a speed enforcement point. Please be careful." The icon M1 is designed so that the user can recognize that the speed measuring device 30 is compatible with the optical method. The notification control may also include control to output a notification sound from the speaker 14. In this case, the control unit 11 may output the voice message, "You are approaching a laser speed enforcement point. Please be careful," from the speaker 14. The notification control may also include other controls, for example, control to make the light-emitting unit 23 emit light. The notification control only needs to be a control that notifies the user of the presence of the speed measuring device 30 in a way that the user can recognize.

[0130] Next, the control unit 11 determines whether to terminate the process shown in Figure 8 (step S6). There is no particular trigger for terminating the process, but for example, it may be triggered when the power to the electronic device 10 is turned off by an operation of the operation unit 19, or when the route guidance function is stopped. If "NO" is determined in step S6, the control unit 11 returns to the process in step S2 and repeats the above process (step S4). For example, if the difference changes from above a threshold to below a threshold, the control unit 11 determines "NO" in step S4 and stops the notification control. In this case, the control unit 11 displays the map screen shown in Figure 12 on the display unit 13. This is because it means that a speed enforcement point has been passed. If "YES" is determined in step S6, the control unit 11 terminates the process shown in Figure 8 (step S7).

[0131] Here, we will explain why the speed measuring device 30 can be detected by the method described above. As explained in Figure 6, the first wavelength selection unit 121 selects and transmits light of a specific wavelength λout (more specifically, the wavelength range from wavelength λ1a to wavelength λ1b) in which the pulsed light Lout has energy. For this reason, the first signal Sig1 should show a large amount of received light during the period when the pulsed light Lout is being received, and a small amount of received light at other times. However, the light receiving unit 12 may receive ambient light in addition to the intended pulsed light Lout. This ambient light may be mistaken for pulsed light. Examples of ambient light include light that arrives when sunlight is periodically blocked by the branches and leaves of trees swaying in the wind. Other examples of ambient light include light that periodically turns on and off from traffic lights and advertisements, and light from rotating warning lights that rotate at a constant speed. In addition, the light received by the light receiving unit changes due to vibrations of the light receiving unit. For example, if vehicle 40 travels over a place that generates periodic vibrations, such as on a pier, the orientation of the light-receiving unit 12 (for example, the first light-receiving element 122) may change, causing it to receive light such as sunlight as light that is repeatedly switched on and off at a predetermined period. In such cases, the first signal Sig1 will also show a relatively large amount of received light.

[0132] In contrast, the second wavelength selection unit 123 blocks light of a specific wavelength λout (in this embodiment, the wavelength range from wavelength λ2a to wavelength λ2b) in which the pulsed light Lout has energy, and transmits light in other wavelength ranges. Therefore, the amount of light received by the second signal Sig2 is small during the period when the pulsed light Lout is being received. The second light-receiving element 124 receives the above-mentioned ambient light, and such ambient light generally has a wide wavelength range in which its energy is distributed. Therefore, even when the light-receiving unit 12 receives ambient light that is periodically switched on and off, the amount of light received by the second light-receiving element 124 is considered to be large. For this reason, when the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is small, that is, when the difference in the amount of light received is greater than or equal to a threshold, it can be estimated that the pulsed light Lout has been received. On the other hand, if the amount of light received by the first signal Sig1 is large, and the amount of light received by the second signal Sig2 is also large, that is, if the difference in the amount of light received is less than a threshold, it can be estimated that the possibility of pulsed light Lout being received is low. Therefore, according to the electronic device 10, by receiving light using the first light-receiving element 122 and the second light-receiving element 124, it is expected that the detection accuracy of the speed measuring device 30 will be improved.

[0133] <1-2-2. Radar-based notification> Furthermore, based on the microwaves received by the microwave receiver 15, the control unit 11 may perform the process shown in Figure 13 in parallel with the process shown in Figure 8.

[0134] First, the control unit 11 acquires a microwave reception signal from the microwave receiving unit 15 (step S11). Next, the control unit 11 performs a determination process to determine whether or not a radar-type speed measuring device is present based on the microwave reception signal (step S12). In step S12, the control unit 11 may determine whether or not a speed enforcement point exists based on the frequency band of the received microwaves. The algorithm for this determination may be, for example, the method described in Patent Document 1 or 2, and its explanation will be omitted.

[0135] Next, the control unit 11 determines whether it has detected a speed measuring device based on the result of the determination process (step S13). If it determines "YES" in step S13, the control unit 11 performs notification control (step S14). Notification control here is control that notifies the user of the presence of a speed measuring device by the third method. Notification control includes, for example, control to display a notification screen on the display unit 13. Figure 14 is a diagram showing an example of a notification screen. The notification screen shown in Figure 14 is a screen in which window W2 is placed on top of the map screen described above. Window W2 contains an icon M2 indicating the presence of a speed measuring device 30 and a message indicating the presence of a speed measuring device, "You are approaching a speed enforcement point. Please be careful." Icon M2 is an icon that allows the user to recognize that the speed enforcement device is radar-based. That is, icon M2 is different from icon M1. The notification control may also include control to output a notification sound from the speaker 14. In this case, the control unit 11 may output a voice message from the speaker 14 saying, "You are approaching a radar speed enforcement point. Please be careful." The notification control may also include other controls, such as control to make the light-emitting unit 23 illuminate. Here as well, the notification control only needs to be a control that notifies the user of the presence of a speed measuring device in a way that allows the user to recognize it.

[0136] <1-3. Modifications of the First Embodiment> The control unit 11 may further perform the following controls. <1-3-1. Notification based on the number of pulses> When the speed measurement device 30 emits light in a pulse waveform, referring to the number of pulses is also useful for detecting the speed measurement device 30. FIG. 15 is a diagram showing an example of the waveform of the pulsed light Lout received by the electronic device 10. FIG. 15(a) shows the case where the distance between the electronic device 10 and the speed measurement device 30 is relatively large, and FIG. 15(b) shows the case where the distance between the electronic device 10 and the speed measurement device 30 is relatively small. As shown in FIG. 15(a), when the distance between the speed measurement device 30 and the electronic device 10 is relatively large, the pulsed light Lout traveling in the direction of the electronic device 10 can be received, but the pulsed light traveling in the direction that propagates only to the position close to the speed measurement device 30 on the road (for example, directly beside the speed measurement device 30) is not received. Therefore, the light reception period Rx1 of the pulsed light Lout becomes relatively shorter than the non-light reception period Rx2. As shown in FIG. 15(b), when the distance between the speed measurement device 30 and the electronic device 10 is relatively small, the pulsed light Lout traveling in the direction of the electronic device 10 can be received, and the pulsed light traveling in the direction that propagates only to the position close to the speed measurement device 30 on the road can also be received. Therefore, the light reception period Rx1 of the pulsed light Lout becomes relatively longer than the non-light reception period Rx2. Also, it is considered that the number of pulses decreases immediately after the vehicle 40 passes the position of the speed measurement device 30. In actuality, the relationship Rx1 << Rx2 may be satisfied.

[0137] Therefore, the control unit 11 may perform notification control according to the number of pulses. For example, the control unit 11 may change the notification level according to the number of pulses included in the period of receiving pulsed light. The notification level is an indicator of how important the content of the notification is to the user, and in this embodiment, it may be rephrased as an alarm level. The control unit 11 determines the number of pulses based on at least the amount of light received by the first light receiving element 122. For example, the control unit 11 raises the notification level during periods when the number of pulses is above a threshold or during periods when the number of pulses is increasing, because it is approaching the speed measuring device 30. The control unit 11 lowers the notification level during periods when the number of pulses is below a threshold or during periods when the number of pulse widths is decreasing, because it is far from or moving away from the speed measuring device 30. The control unit 11 changes the notification method according to the notification level. For example, the control unit 11 may change the message displayed on the display unit 13, change the notification sound output from the speaker 14, or change the light emission color of the light emission unit 23 according to the notification level.

[0138] Furthermore, the control unit 11 may estimate the distance from the number of pulse widths and provide notification according to that distance. For example, as shown in Figure 16, the control unit 11 may estimate the position of the speed measuring device 30 from the number of pulse widths and display it on the map. In this example, icon P indicates the position of the speed measuring device 30. As described above, the control unit 11 can provide notification to the user according to the positional relationship between the light receiving unit 12 and the speed measuring device 30.

[0139] By the way, as shown in Figure 17, if another vehicle is present in front of vehicle 40, all or part of the pulsed light Lout may be obstructed by the vehicle C traveling ahead. In this case, even if the number of pulses is referred to, it may not be possible to accurately determine the positional relationship. Therefore, the control unit 11 detects the presence or absence of another vehicle C in front of vehicle 40 within a predetermined range. The control unit 11 should perform notification control according to the number of pulses if no other vehicle C is present, and stop the notification control if vehicle C is present. Stopping the notification control according to the number of pulses means not changing the content of the notification control according to the number of pulses. In addition, the electronic device 10 may stop the notification control according to the number of pulses if the distance between vehicles is less than a threshold, and perform this notification control if it is above the threshold. There is no particular method for detecting vehicle C, but one method is to use an on-board camera 50. The on-board camera 50 is a camera used in, for example, a drive recorder, and here it captures images of the area in front of vehicle 40.

[0140] Figure 18 is a flowchart showing the operation of the control unit 11 of the electronic device 10 in this case. The control unit 11 acquires the captured image from the in-vehicle camera 50 via the communication unit 17 (step S21). Next, the control unit 11 analyzes the captured image (step S22). The algorithm for analyzing the captured image is not specified, but one example is the pattern matching method. Then, the control unit 11 determines whether there is a vehicle in front (step S23). If it is determined to be "NO" in step S23, the control unit 11 determines to perform notification control according to the number of pulses (step S24). In this case, the control unit 11 performs processing such as rewriting a flag to a value indicating that control according to the number of pulses should be performed. If it is determined to be "YES" in step S23, the control unit 11 determines to stop the notification control according to the number of pulses (step S25). In this case, the control unit 11 performs processing such as rewriting a predetermined flag to a value indicating that control according to the number of pulses should not be performed. Here, a vehicle in front of vehicle 40 was detected, but it could also be behind vehicle 40, etc. Furthermore, the electronic device 10 may have a built-in onboard camera 50. As a result, the possibility of misinterpreting the positional relationship between the light-receiving unit 12 and the speed measuring device 30 due to the presence of other vehicles C is reduced.

[0141] <1-3-2. Control based on pulse width or pulse interval> When the speed measuring device 30 emits pulsed light, referring to the pulse width or pulse interval is also useful in detecting the speed measuring device 30. The speed measuring device 30 emits pulsed light of a specific wavelength with a predetermined duty cycle. Also, from a safety standpoint, the duty cycle of the pulsed light is set to less than a predetermined value. Therefore, the control unit 11 may determine whether the speed measuring device 30 is present based on a predetermined pulse width or pulse interval and the pulse width or pulse interval of the received light. For example, the control unit 11 determines that the speed measuring device 30 is present if it falls within a certain range from the reference pulse width or pulse interval, but determines that it is not present otherwise. The control unit 11 determines the pulse width or pulse interval based on at least the amount of light received by the first light-receiving element 122. In this way, the control unit 11 can reduce false alarms that mistake ambient light for light from the light-emitting device.

[0142] <1-3-3. Control according to the intensity of pulsed light> Referring to the intensity of the pulsed light received is also useful in detecting the speed measuring device 30. The intensity of the pulsed light increases as the vehicle 40 approaches the speed measuring device 30, and decreases as it moves away. Therefore, the control unit 11 may change the notification level according to the amount of pulsed light received by the first light receiving element 122. For example, the control unit 11 may raise the notification level when the intensity of the pulsed light is increasing, and lower the notification level when it is decreasing. Also, the control unit 11 may determine that the speed measuring device 30 is not present if the amount of pulsed light received is below a threshold. As described above, the control unit 11 can provide the user with notification according to the positional relationship between the light receiving unit 12 and the speed measuring device 30.

[0143] As ambient light, there may also be light used by sensors for detecting other vehicles, as exemplified by inter-vehicle sensors. In such cases, light with the same frequency as the pulsed light Lout may be used. Even in such cases, it is expected that the possibility of false alarms will be reduced by referring to the pulse interval or the intensity of the pulsed light received by the electronic device 10.

[0144] <1-3-4. Notification of whether imaging was performed> After performing notification control, the control unit 11 may perform control to notify whether an image has been taken or not, depending on whether a predetermined light has been detected. When an image is taken by the imaging unit 32, the strobe 33 emits light. Therefore, after performing notification control, the control unit 11 may further notify that an image has been taken if it detects the light from the strobe 33. Alternatively, after performing notification control, the control unit 11 may notify that an image has not been taken if it does not detect the light from the strobe 33. This allows the user to understand whether the vehicle 40 has been photographed or not. Note that light from the strobe 33 may be received using the light receiving unit 12 or another light receiving unit.

[0145] [2. Second Embodiment] In this embodiment, the electronic device 10 has a function to notify the presence of the speed measuring device 30 even when it does not receive pulsed light and microwaves. The electronic device in this embodiment may or may not have some or all of the functions of the first embodiment described above.

[0146] <2-1. Configuration of the second embodiment> Figure 19 is a diagram illustrating the system outline of this embodiment. As shown in Figure 19, there are various types of roads. For example, on road Ar1, which is also used as a school route called a green belt, it is of particular importance to adhere to the speed limit for vehicles 40, and the possibility of installing a speed measuring device 30 is considered higher than on other types of roads Ar2. Therefore, the control unit 11 should notify the presence of a speed measuring device 30 when the electronic equipment 10 is located on a predetermined type of road.

[0147] <2-2. Operation of the second embodiment> Figure 20 is a flowchart showing the operation of the control unit 11 of the electronic device 10. The control unit 11 acquires location information from the GPS receiver 16 (step S31). Next, the control unit 11 determines whether the current location indicated by the location information is within a predetermined area (step S32). Here, the control unit 11 determines whether the vehicle 40 is on a green belt based on the current location and the data stored in the storage unit 18. If the control unit 11 determines "YES" in step S32, it performs notification control (step S33). Notification control includes, for example, control to display a notification screen on the display unit 13.

[0148] Figure 21 shows an example of a notification screen. The notification screen shown in Figure 21 is a screen in which window W3 is placed on top of the map screen described above. Window W3 contains an icon M3 indicating the presence of a speed measuring device 30 and a message indicating the presence of a speed measuring device, "You are in a speed enforcement warning area." Icon M3 is designed so that the user can recognize that speed enforcement is being carried out at a location-based location. That is, for example, icon M3 is different from icons M1 and M2. The notification control may also include control to output a notification sound from speaker 14. In this case, the control unit 11 should output the sound "You are in a speed enforcement warning area" from speaker 14. The notification control may also include other controls, for example, control to illuminate light-emitting unit 23. The predetermined area is not limited to a green belt, but may also be a one-way road or other types of road.

[0149] In this way, the presence of the light-emitting device can be notified based on its location, so its presence can be notified even without receiving pulsed light from the speed measuring device 30.

[0150] [3. Third Embodiment] In this embodiment, the electronic device 10 has multiple light-receiving units that receive pulsed light.

[0151] Figure 22 is a block diagram showing the electrical configuration of the electronic device 10. In this example, the electronic device 10 includes three light-receiving units 12A, 12B, and 12C. The configurations of the light-receiving units 12A, 12B, and 12C can be the same as those of the light-receiving unit 12, except for the characteristics of the wavelength selection unit. Note that the display unit 13 to the cable terminal unit 24, which were explained in Figure 6, are omitted from Figure 22.

[0152] Figure 23 shows the characteristics of the first wavelength selection unit 121 and the second wavelength selection unit 123 of the light receiving units 12A, 12B, and 12C in this embodiment. Figure 23(a) corresponds to the light receiving unit 12A, Figure 23(b) to the light receiving unit 12B, and Figure 23(c) to the light receiving unit 12C. As shown in Figures 23(a) to (c), the wavelength of the pulsed light intended for reception differs for each of the light receiving units 12A, 12B, and 12C. As shown by the solid line in Figure 23(a), the first wavelength selection unit 121 of the light receiving unit 12A transmits light in the wavelength range including a specific wavelength λout1, in this case the wavelength range from wavelength λ11a to wavelength λ11b, and blocks light in different wavelength ranges. As shown by the dashed line in Figure 23(a), the second wavelength selector 123 blocks light in the wavelength region including the specific wavelength λout1, in this case the wavelength region from wavelength λ21a to wavelength λ21b, and transmits light in a different wavelength region. As shown by the solid line in Figure 23(b), the first wavelength selector 121 of the light receiving unit 12B transmits light in the wavelength region including the specific wavelength λout2, in this case the wavelength region from wavelength λ12a to wavelength λ12b, and blocks light in a different wavelength region. As shown by the dashed line in Figure 23(b), the second wavelength selector 123 blocks light in the wavelength region including the specific wavelength λout2, in this case the wavelength region from wavelength λ22a to wavelength λ22b, and transmits light in a different wavelength region. As shown by the solid line in Figure 23(c), the first wavelength selection unit 121 of the light receiving unit 12C transmits light in the wavelength region including the specific wavelength λout3, in this case from wavelength λ13a to wavelength λ13b, and blocks light in other wavelength regions. The second wavelength selection unit 123, as shown by the dashed line in Figure 23(c), blocks light in the wavelength region including the specific wavelength λout3, in this case from wavelength λ23a to wavelength λ23b, and transmits light in other wavelength regions. λout1, out2, and out3 are, for example, 850nm, 905nm, and 950nm, but are not limited to these and may be 1900nm, etc.

[0153] The control unit 11 detects the speed measuring device 30 based on the first signal Sig1 and the second signal Sig2 from any of the light receiving units 12A, 12B, or 12C, and notifies that the speed measuring device 30 is present. According to this embodiment, even if there are multiple speed measuring devices 30 with different wavelengths of light emitted by the electronic equipment 10, or if the wavelength of light emitted by the speed measuring device 30 is changed, the presence of the speed measuring device 30 can be notified.

[0154] The characteristics of multiple light-receiving units 12 may be made identical. In this case, as shown in Figure 24, light-receiving units 12A, 12B, and 12C may be provided at different locations on the vehicle 40. Here, light-receiving unit 12A is provided in the left front part, light-receiving unit 12B in the center front part, and light-receiving unit 12C in the right front part. This makes it possible to estimate the direction of arrival of the laser based on the laser reception timing of the light-receiving units 12A, 12B, and 12C. For example, if the laser is coming from the left front, the reception timing of light-receiving unit 12A will be relatively earlier, and if it is coming from the right front, the reception timing of light-receiving unit 12C will be relatively earlier. Furthermore, the control unit 11 may inform the user of the direction from which the pulsed light is coming.

[0155] Furthermore, the speed measuring unit 31 emits pulsed light onto a mirror that rotates at a constant speed, and emits the reflected pulsed light Lout from this mirror. Therefore, the timing of receiving the pulsed light Lout in each of the light receiving units 12A, 12B, and 12C will vary depending on, for example, the rotation speed of the mirror, the position of the light receiving units 12A, 12B, and 12C, and the distance between the light receiving units 12A, 12B, and 12C and the speed measuring device 30. Accordingly, the control unit 11 may detect the speed measuring device 30 based on the timing of receiving the pulsed light Lout in the light receiving units 12A, 12B, and 12C.

[0156] The light-receiving units 12A, 12B, and 12C may each receive light from different directions. For example, the orientation of the light-receiving elements in the light-receiving units 12A, 12B, and 12C may be differed by 20 degrees each. This may help suppress the decrease in detection accuracy due to the installation position of the speed measuring device 30. In this embodiment, it is preferable to have two or four or more light-receiving units.

[0157] [4. Configuration of the light-receiving unit 12] Next, we will describe an example configuration of the light-receiving unit 12 that can be applied to each of the embodiments described above. Figure 25 shows an example of the circuit configuration of the light-receiving unit 12. The first light-receiving element 122 is here a photodiode PD1. Light is incident on the light-receiving surface of the photodiode PD1 via the first wavelength selection unit 121. The cathode of PD1 is connected to the high-potential power line, and the anode is connected to one end of resistor R1. The other end of resistor R1 is grounded. The input terminal of the output control circuit A1 is commonly connected to the anode of photodiode PD1 and one end of resistor R1. The output terminal of the output control circuit A1 is connected to the negative input terminal of the differential amplifier AMP. The output control circuit A1 is, for example, an amplifier that adjusts the signal level. The second light-receiving element 124 is here a photodiode PD2. Light is incident on the light-receiving surface of the photodiode PD2 via the second wavelength selection unit 123. The cathode of photodiode PD2 is connected to the high-potential power line, and the anode is connected to one end of resistor R2. The other end of resistor R2 is grounded. The input terminal of output control circuit A2 is commonly connected to the anode of photodiode PD2 and one end of resistor R2. The output terminal of output control circuit A2 is connected to the positive input terminal of differential amplifier AMP. Output control circuit A2 is, for example, an amplifier that adjusts the signal level. A signal corresponding to the difference in the amount of light received by photodiodes PD1 and PD2 is output from the output terminal of differential amplifier AMP. The control unit 11 detects the speed measuring device 30 based on this difference. The control unit 11 may detect the speed measuring device 30 based on the signal after it has been amplified by the differential amplifier AMP.

[0158] [5. External configuration of electronic device 10] Figure 26 is a six-view drawing showing an example of the external configuration of the electronic device 10. In this example, the front of the housing of the electronic device 10 is provided with a display unit 13, a light-emitting unit 23, and an illuminance sensor 201 of the sensor unit 20. A speaker 14 is provided to output sound from the upper end surface of the housing 100. A mounting section 21 (i.e., an SD card slot) for inserting an SD card (registered trademark) is provided on the right end surface of the housing 100. A light-receiving unit 12 is provided on the upper right part of the back of the housing 100. In addition, a power switch 221 and a DC jack 222 of the power supply unit 22 are provided on the lower left part of the back of the housing 100. Area 104 is the area where the model name and serial number are written.

[0159] [6. Other embodiments of notification control performed by the electronic device 10] Next, other embodiments of the information notification control performed by the electronic device 10 will be described. In the following notification controls, the notification controls described above may be combined as appropriate. <6-1. Notification regarding pulsed light Lout (fixed type)> The control unit 11 performs a first notification control to notify the presence of the fixed speed measuring device 30. Figure 27 shows an example of a notification screen displayed when the electronic device 10 receives pulse light Lout from the fixed speed measuring device 30. As shown in Figure 27, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40 and information display areas TA1, TA2, TB1, and TB2 are superimposed on a map M11. Information display areas TA1 and TA2 are displayed when pulse light Lout is received, respectively. Information display area TA1 is located in the lower right of the display screen. Information display area TA1 displays the attributes of the speed measuring device 30 and the status of the vehicle 40. As attributes of the speed measuring device 30, information display area TA11 displays the string "laser" TA11, which means that the speed measuring device 30 corresponds to an optical method, and an icon TA12 that resembles the speed measuring device 30. The information display area TA1 further displays the string TA13 (in this case, 60 km / h) indicating the current speed of the vehicle 40 as the status of the vehicle 40. In this way, the electronic device 10 can make the user aware of at least one of the attributes of the speed measuring device 30 and the status of the vehicle 40. The attributes of the speed measuring device may be other attributes, such as the estimated distance from the vehicle 40. The information display area TA1 may also display the notification level if it can be specified. The status of the vehicle 40 may indicate other driving conditions besides speed, such as engine speed.

[0160] Information display area TA2 is located in the lower left of the display screen. Information display area TA2 displays an animated image that includes an image that mimics the speed measuring device 30. The animated image is an image that gives the viewer the impression that the image is moving by continuously switching between multiple still images (frames) at predetermined time intervals. In this way, the electronic device 10 can easily make the user aware that there is a speed measuring device 30 approaching the vehicle 40. Information display area TB1 is located in the upper right of the display screen and displays the address of the current location. Information display area TB2 is located in the upper left of the display screen and displays the current time. The control unit 11 may be configured to provide notification by predetermined sound in addition to notification by display.

[0161] Figures 28 and 29 show examples of animation images displayed in the information display area TA2. In Figures 28 and 29, the images in each frame are displayed in the order indicated by the arrows. When the image in the bottom right frame of Figure 28 is displayed, the image in the top left frame of Figure 29 is displayed next. When the image in the bottom right frame of Figure 29 is displayed, the display returns to the image in the top left frame of Figure 28. As shown in Figure 28, the animation image includes image TA21 showing the side of the road, image TA22 mimicking a speed measuring device, and image TA23 visually representing the area illuminated by pulsed light emitted from the speed measuring device. As shown in Figures 28 and 29, in the animation image, the vehicle approaches the speed measuring device as time progresses, and after the closest approach, an image showing the speed measuring device from a position far away (see the frame enclosed by the dashed line) is displayed. Then, in the animation image, the vehicle approaches the speed measuring device again as time progresses. The control unit 11 displays an animation in which the images of each frame are shown in the order described above, while it is receiving the pulse light Lout. When the control unit 11 no longer detects the presence of the optical speed measuring device 30, it stops the notification immediately or after a predetermined time. This predetermined time may be, for example, 3 seconds. The first frame in the animation may be an image showing the speed measuring device as seen from the position furthest away from the device (see the frame enclosed by the dashed line).

[0162] <6-2. Notification regarding pulsed light Lout (mobile type)> The control unit 11 performs a second notification control to notify the presence of the mobile speed measuring device 30. The second notification control is a different notification control from the first notification control. Figure 30 shows an example of a notification screen displayed when the electronic device 10 receives pulse light Lout from the mobile speed measuring device 30. As shown in Figure 30, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40 and information display areas TA1, TA3, TB1, and TB2 are superimposed on the map M11. The information display areas TA1, TB1, and TB2 are the same as the information display areas TA1, TB1, and TB2 described in Figure 27. Information display area TA3 is displayed when pulse light Lout is received. Information display area TA3 is located in the lower left of the display screen. Information display area TA1 displays the attributes of the speed measuring device 30 and the status of the vehicle 40. Information display area TA3 displays an animated image including an image that mimics the speed measuring device 30. The control unit 11 may be configured to provide notification by a predetermined sound in addition to notification by display. Furthermore, an icon indicating the location of the speed measuring device 30 may be placed on the map M11.

[0163] Figures 31 and 32 show examples of animated images displayed in the information display area TA3. In Figures 31 and 32, the images in each frame are displayed in the order indicated by the arrows. When the image in the bottom right frame of Figure 31 is displayed, the image in the top left frame of Figure 32 is displayed next. When the image in the bottom right frame of Figure 31 is displayed, the display returns to the image in the top left frame of Figure 32. As shown in Figure 31, the animated image divides the image area into left and right sections using diagonal lines. The left section contains image TA31 showing the surroundings of the road, image TA32 mimicking a speed measuring device, and target image TA33 surrounding image TA32. The right section contains image T34 showing the surroundings of the road, image TA35 mimicking a speed measuring device, and target image TA36 surrounding image TA35. As shown in Figures 31 and 32, in the animation, as time progresses, the speed measuring device is approached, and the target images TA33 and TA36 repeatedly enlarge and shrink, changing their size periodically. After approaching the speed measuring device, an image showing the speed measuring device as seen from a position far away from it is displayed. Then, the image showing the device approaching the speed measuring device again as time progresses is displayed. During the period when the pulse light Lout is being received, an animation is displayed in which the images of each frame are shown in the order described above. When the control unit 11 no longer detects the presence of the optical speed measuring device 30, it stops the notification immediately or after a predetermined time. This predetermined time may be 3 seconds. The first frame in the animation may be an image showing the speed measuring device as seen from the position furthest away from it.

[0164] <6-3. Information regarding radar systems> The control unit 11 performs a third notification control to notify the presence of a radar-type speed measuring device in response to the reception of microwave radio waves. Figure 33 shows an example of a notification screen when the electronic device 10 receives light from a radar-type speed measuring device. As shown in Figure 33, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40, an icon I12 indicating the installation location of the radar-type speed measuring device, and information display areas TA4, TA5, TB1, and TB2 are superimposed on the map M11. Information display areas TB1 and TB2 are the same as the information display areas TB1 and TB2 described in Figure 27. Information display area TA4 displays the attributes of the speed measuring device and the status of the vehicle 40. As attributes of the speed measuring device, information display area TA44 displays the string "Radar," which means that it corresponds to a radar system, and "Lv.5," which indicates the notification level according to the intensity of the radio waves from the speed measuring device, as well as an icon TA42 indicating that it is a radar-type speed measuring device. Information display area TA4 displays the status of the vehicle 40, specifically the string TA43 (in this case, 88 km / h) indicating the current speed of the vehicle 40. Information display area TA5 is located in the lower left of the display screen. Information display area TA5 displays an animated image, including an image that mimics a speed measuring device. The control unit 11 may be configured to provide notification by a predetermined sound in addition to the display notification.

[0165] Figures 34 and 35 show examples of animated images displayed in the information display area T5 of Figure 33. In Figures 34 and 35, the images in each frame are displayed in the order indicated by the arrows. When the image at the bottom right of Figure 34 is displayed, the image at the top left of Figure 35 is displayed next. When the image at the bottom right of Figure 35 is displayed, the display returns to the image at the top left of Figure 34. As shown in Figures 34 and 35, the animated image includes an image TA51 showing the side of the road, an image TA52 mimicking a speed measuring device, and a ring-shaped image TA53 mimicking microwaves emitted from the speed measuring device. As shown in Figures 34 and 35, the animated image approaches the speed measuring device over time, and furthermore, image TA53 repeatedly expands and contracts, changing its size periodically as it approaches the viewer. In the animation, after approaching the speed measuring device, an image showing the speed measuring device from a position farther away from it (see the frame enclosed by the dashed line) is displayed. Then, in the animation, the vehicle is shown approaching the speed measuring device again as time progresses. During the period when a radar-type speed measuring device is detected, an animation is displayed showing the images in the order described above. When the control unit 11 no longer detects the presence of a radar-type speed measuring device, it stops the notification immediately or after a predetermined time. This predetermined time may be 3 seconds. The period from when the presence of the speed measuring device is no longer detected until the notification is stopped may be the same for optical and radar-type speed measuring devices, but may be different. The first frame in the animation may be an image showing the speed measuring device from the position furthest away from it (see the frame enclosed by the dashed line).

[0166] Figure 36 shows the relationship between received microwaves (referred to as "radar waves" in Figure 36) and the notification method. The control unit 11 identifies the received radar waves and controls the notification accordingly. As shown in Figure 36(a), the radar waves include stealth waves that emit radio waves only at the moment a predetermined stealth speed enforcement device measures, normal radar waves, new radar waves corresponding to the K-band and X-band, and cancellation notifications. The cancellation notification is a function that automatically registers GPS location information when passing through a place that emits radio waves and causes a false alarm, such as an automatic door, and cancels the radar notification when radio waves are received on the second or subsequent passes. As shown in Figure 36(a), the control unit 11 changes the emission color of the light-emitting unit 23 according to the notification level. Also, as shown in Figure 36(b), the control unit 11 changes the notification sound (e.g., electronic sound) emitted from the speaker 14 according to the distance between the electronic device 10 and the microwave source.

[0167] <6-4. Notification Regarding Other Types of Speed ​​Measuring Devices> In addition to the above, if a speed measuring device is detected, the control unit 11 displays an information display area corresponding to the detection method in the lower right corner of the notification screen. As shown in Figure 37(a), in the case of an LH system, the information display area TA6 is displayed. As shown in Figure 37(b), in the case of a loop coil, the information display area TA7 is displayed. The control unit 11 may also display animation images for other speed measuring methods, but it may choose not to display them for some or all methods.

[0168] <6-5. Notifications Regarding Collision Warnings> As shown in Figure 39(a), the electronic device 10 works in conjunction with the sensor device 90 to provide a collision warning. A collision warning is an example of a warning based on the relative position of vehicle 40 and other vehicles, and is a function that warns when there is a risk of the vehicle colliding with another vehicle. The sensor device 90 has the function of a distance sensor that detects the distance to other vehicles ahead. The distance sensor detects the distance using an infrared method and outputs the detected distance to the electronic device 10. The sensor device 90 and the electronic device 10 are connected via a wired or wireless communication cable. The control unit 11 performs a fourth warning control based on the relative position of vehicle 40 and other vehicles. The relative position is determined here based on the distance between vehicles. The fourth warning control is a control that provides a collision warning.

[0169] Figure 38 shows an example of a notification screen related to collision warnings. Figure 38(a) is a screen related to collision warnings, which warns when approaching a stationary vehicle ahead. On this screen, the map M11 displays an icon I11 indicating the position of vehicle 40, an information display area TC11, and an information display area TC12 indicating the current speed. Figure 38(b) is a screen related to departure warnings, which warns when the vehicle ahead starts moving and vehicle 40 is stopped. On this screen, the map M11 displays an icon I11 indicating the position of vehicle 40, an information display area TC21, and an information display area TC22 indicating the current speed. Figure 38(c) is a screen related to excessive proximity warnings, which warns when the distance between vehicle 40 and the vehicle ahead falls below a threshold while driving. On this screen, the map M11 displays an icon I11 indicating the position of vehicle 40, an information display area TC31, and an information display area TC32 indicating the current speed. The control unit 11 should, in addition to the screen display described above, also provide an audible notification when issuing a collision warning. The notification time can be, for example, 5 seconds, but it can be any other time. As shown in Figure 38(d), the control unit 11 should change the sound according to the content of the notification.

[0170] <6-6. Notification regarding warnings about distracted driving and drowsy driving> The control unit 11 performs a fifth notification control to notify the status of the occupants of the vehicle 40 based on images from a camera that captures the interior of the vehicle 40. The occupants are those who are in the vehicle 40, and may be the driver, but may also be other occupants. As shown in Figure 39(a), the electronic device 10 works in conjunction with the camera 70 to provide notification regarding warnings related to distracted driving and drowsy driving. The camera 70 is a camera that captures images of the interior of the vehicle. Based on the captured images, the camera 70 detects the user's status and outputs information corresponding to that status to the electronic device 10. The camera 70 and the electronic device 10 are connected via a wired or wireless communication cable. The camera 70 captures at least the user's face. The camera 70 detects the orientation of the user's face and the direction of their gaze and notifies information according to the detection results. The camera 70 is mounted above the windshield 42, which is higher than the user's eye level, using a predetermined mounting member. The camera 70 may be mounted on the rearview mirror 43, the dashboard 41, or other locations.

[0171] As shown in Figure 39(b), the control unit 11 issues a distraction warning if the user's face is turned to the side by a predetermined angle from the front. Figure 40(a) is an example of a notification screen that warns of distraction. On this screen, the map M11 displays an icon I11 indicating the position of the vehicle 40, an information display area TD11, and an information display area TD12 indicating the current speed. Figure 39(c) is an example of a screen related to a drowsy driving warning. If the user closes both eyes for about 1 second or more, the control unit 11 displays a notification screen warning of drowsy driving, as shown in Figure 40(b). On this screen, the map M11 displays an icon I11 indicating the position of the vehicle 40, an information display area TD21, and an information display area TD22 indicating the current speed. If the user closes both eyes for about 3 seconds or more, as shown in Figures 39(c) and 40(c), the control unit 11 changes the background color and displays a notification screen warning of drowsy driving. On this screen, the map M11 displays an icon I11 indicating the position of vehicle 40, an information display area TD31, and an information display area TD32 indicating the current speed. In addition to the screen display described above, the control unit 11 also provides audible alerts when issuing warnings related to distracted or drowsy driving. As shown in Figures 39(c) and 41, the control unit 11 may change the sound of the warning depending on at least one of the duration of the eyes being closed and the number of times the warning has been issued.

[0172] <6-7.GPS warning> Next, the GPS warning will be explained. The GPS warning is a control that issues a warning when the position measured by the GPS receiver 16 is in a predetermined positional relationship with the object to be notified. The predetermined relationship may be when the vehicle and the object to be notified have approached to a predetermined distance. The GPS warning may also include the warning control described in <6-2. Warning related to pulse light Lout (mobile type)>. Figure 42 is a diagram showing the GPS warning. There are various warning methods depending on the settings. If the alarm 1000m switching (initial value) is set, the control unit 11 may display the warning screen from the standby screen when it is 1km away from the object to be notified. If the alarm 500m switching is set, the control unit 11 may display the warning screen from the standby screen when it is 500m away from the object to be notified. If the standby screen is fixed, the control unit 11 may display the standby screen regardless of the distance to the object to be notified.

[0173] In the case of a GPS warning, the control unit 11 should, if the object to be notified is located at an angle of 25 degrees or more to the left or right of the front of the vehicle 40's direction of travel, add an audio message indicating the direction of the object, such as "left" or "right," when issuing the warning. This makes it easier for the user to understand the direction of the object to be notified.

[0174] <6-8. Notification Control> The control unit 11 may display the animation image described above regardless of the location and time of the electronic device 10 when the pulse light Lout is received, but it may also change the animation image depending on at least one of the location and time. The animation image may be displayed using a photograph or computer-generated image of the site where the speed enforcement device is installed.

[0175] Figure 43 is a table illustrating the notification control performed by the electronic device 10. In Figure 43, "○" indicates a notification control that is permitted to be performed in parallel with the first or second notification control that notifies the presence of an optical speed measuring device, and "×" indicates a notification control that is not permitted. The control unit 11 should stop the third notification control during the period when the first or second notification control is being performed. In this way, when notifying the presence of the speed measuring device 30, the presence of a radar-type speed measuring device can be avoided. Furthermore, the control unit 11 should also avoid notifying the presence of another type of speed measuring device even if it detects the presence of another type of speed measuring device during the period when the notification screen for pulsed light reception is displayed. The other type is often a radar type, and it can be assumed that microwaves have been received. If pulsed light results in fewer false detections of speed measuring devices than radar waves, the accuracy of the speed measuring device notification will improve. Also, if the presence of any speed measuring device is notified, the user will consciously try to drive safely, so there will be little inconvenience.

[0176] The control unit 11 should perform the fourth notification control in parallel with the first or second notification control. As shown in Figure 44, the control unit 11 should provide notification regarding collision warnings during the period when the notification screen for pulsed light reception is displayed. This is based on the idea that collision warnings are high-priority warnings. For example, when the control unit 11 provides a collision warning while the notification screen for pulsed light reception is displayed, it will display the information shown in Figure 44. In this example, information display areas TA1, TA2, and TC1 are displayed simultaneously. It is also preferable that departure warnings, too-close warnings, and lane departure warnings be handled similarly. In this way, the control unit 11 can provide a collision warning even when the vehicle is approaching the speed measuring device 30 when a notification regarding collision warnings becomes necessary.

[0177] The control unit 11 should stop the fifth notification control during the period when the first notification control or the second notification control is being performed. The control unit 11 should also refrain from issuing warnings regarding distracted or drowsy driving during the period when the notification screen for receiving pulsed light is being displayed. In this way, when the need for a collision warning arises, the control unit 11 can issue a collision warning even when it should issue a warning regarding the user's distracted or drowsy driving.

[0178] The control unit 11 should perform the fourth notification control in parallel with the third notification control. When the presence of a radar-type speed measuring device is detected and its notification screen is displayed, a collision warning notification is issued. This is based on the idea that a collision warning is a high-priority warning. For example, when the control unit 11 detects a radar-type speed measuring device and displays its notification screen, if it issues a collision warning, it will display the information shown in Figure 45. In this example, information display areas TA4, TA5, and TC1 are displayed simultaneously. It is also advisable to perform similar notifications for departure warnings, too-close warnings, and lane departure warnings. On the other hand, the control unit 11 should stop the fifth notification control during the period when the third notification control is being performed. In this way, when the presence of the speed measuring device 30 is notified, warnings related to distracted driving or drowsy driving are not issued.

[0179] The notification control of the electronic device 10 may be configured in a manner other than that shown in the table in Figure 43. When a first event and a second event occur simultaneously as events to be notified, the control unit 11 may notify the first event, which has a higher priority, while stopping the notification for the second event, which has a lower priority. This makes it easier for the user to be aware of the occurrence of the first event, which has a higher priority. The control unit 11 may also notify both the first and second events simultaneously. This allows the user to be aware of information about both the first and second events. The control unit 11 may also notify three or more events simultaneously. The control unit 11 may also notify the occurrence of three or more events simultaneously. The control unit 11 may also notify the notification periods for the first and second events to be the same, but may also not notify them. The combination of the first and second events may be predetermined at the design stage, or it may be set by the user. Furthermore, when two or more notification controls are performed in parallel, the display notifications may be performed in parallel, but at least one of the audible notifications may be stopped.

[0180] Furthermore, the electronic device 10 may refrain from providing notification using either the optical or radar method, or both, when the vehicle 40's speed is below a predetermined speed. This is because if the vehicle 40 is traveling at the predetermined speed, there are relatively few safety issues, and therefore notification is unnecessary. However, if the vehicle 40 is traveling on a road of a predetermined type, such as a green belt, the electronic device 10 may provide notification using either the optical or radar method, or both. The predetermined speed may be, for example, 30 km / h, but it may be any other speed. In this way, depending on the vehicle 40's position, if the presence of the speed measuring device 30 should be notified, it can be notified.

[0181] Furthermore, it is preferable that the electronic device 10 has a cancellation function that corresponds to the radar system, but does not have a cancellation function that corresponds to the optical system. This is because false alarms that can occur with the radar system are less likely to occur with the optical system.

[0182] Furthermore, the electronic device 10 may also provide notification regarding the content and timing of notification of information concerning the notification target object, as shown in the tables in Figures 46 to 48.

[0183] [7. Mechanism of Electronic Devices 10] Figure 49 is a perspective view showing an example of the external configuration of the electronic device 10. Figures 50 and 51 are six-view drawings showing an example of the external configuration of the electronic device 10. Figure 50 shows the front view, top view, right side view, bottom view, and left side view of the electronic device 10. Figure 51 shows the rear view of the electronic device 10. In this example, the housing 100 of the electronic device 10 is divided into a first housing 1001 located on the front side and a second housing 1002 located on the rear side. The front of the first housing 1001 is provided with a display unit 13, a light-emitting unit 23, and an illuminance sensor 201 of the sensor unit 20. The display area of ​​the display unit 13 is located in the opening on the front of the first housing 1001. A speaker 14 is provided to output sound from the upper end surface of the second housing 1002. The right end surface of the housing 100 is provided with a mounting section 21 (i.e., an SD card slot) for inserting an SD card. A light-receiving unit 12 is provided in the upper right part of the back of the housing 100. Additionally, a power switch 221 and a DC jack 222 for the power supply unit 22 are provided in the lower left part of the back of the housing 100.

[0184] As shown in Figure 51, a lid 1003 is provided on the back of the second housing 1002. The lid 1003 is located slightly to the upper right of the second housing 1002 when viewed from the back. The lid 1003 is a detachable lid for the second housing 1002 and is longer in the left-right direction than in the up-down direction. The lid 1003 is a light-transmitting portion formed of a material that transmits at least pulsed light Lout. The lid 1003 may be made of the same material as the housing 100, but may also be made of a different material. The lid 1003 is made of resin or other material. The lid 1003 may be made of a material that blocks visible light and may also function as a visible light cut filter, but this is not required. The lid 1003 may be made of a translucent or transparent material. Alternatively, instead of the lid 1003, a light-transmitting portion that transmits at least pulsed light Lout may be formed on the back of the housing 100.

[0185] Figure 52 is a rear view showing the second housing 1002 with the lid 1003 removed. As shown in Figure 52, the second housing 1002 has a first window 101 and a second window 102. The first window 101 and the second window 102 are openings for guiding external light into the interior of the housing 100. However, the first window 101 and the second window 102 may have components such as lenses that transmit light of at least a specific wavelength. The first window 101 and the second window 102 are arranged with a predetermined distance between them in the left-right direction. The first window 101 and the second window 102 are circular, but they may have other shapes. Pulsed light enters the interior of the housing 100 through the first window 101 and the second window 102. If the lid 1003 is made of a translucent or transparent material, the first window 101 and the second window 102 are visible to the user. This can sometimes be aesthetically pleasing.

[0186] Figure 53 is an exploded perspective view of the electronic device 10. As shown in Figures 53(a) and (b), the housing 100 of the electronic device 10 houses, in order from the first housing 1001 side, a display unit 13, a first circuit board 1010, and a second circuit board 1030. The first circuit board 1010 is a rectangular circuit board that is longer in the left-right direction than in the up-down direction in a plan view. The display unit 13 is mounted on the first surface of the first circuit board 1010, which is on the front side. A control circuit 1331 is mounted on the same first surface of the first circuit board 1010. The control circuit 1331 may implement some or all of the functions of the control unit 11. The control circuit 1331 may be an integrated circuit (IC), for example. Here, there is only one control circuit 1331, but it may be replaced with two or more control circuits. A microwave receiver 15 is mounted on the second surface of the first circuit board 1010, which is opposite to the first surface. The microwave receiver 15 is approximately rectangular in shape. The second housing 1002 is screwed to the first housing 1001 to accommodate these components.

[0187] Figure 54 is a rear view showing the electronic device 10 with the second housing 1002 removed. Figures 55, 56, and 57 are perspective views showing the internal configuration of the electronic device 10 in this state. The second substrate 1030 is positioned on the rear side of the first substrate 1010, overlapping the first substrate 1010. The second substrate 1030 is approximately L-shaped in plan view. This shape is due to the fact that the area where the microwave receiving unit 15 is located is cut out of the second substrate 1030. This arrangement reduces the increase in the thickness of the electronic device 10 compared to the case where the second substrate 130 overlaps the microwave receiving unit 15. The light receiving unit 12 is mounted on the first region Ar3 of the second substrate 1030, which is long in the vertical direction. The first wavelength selection unit 121 and the first light receiving element 122 are provided facing the first window 101. A second wavelength selection unit 123 and a second light-receiving element 124 are provided facing the second window 102.

[0188] The first wavelength selection unit 121 and the first photodetector 122, as well as the second wavelength selection unit 123 and the second photodetector 124 facing the second window 102, are housed in a shielding case 1031. The shielding case 1031 is made of a conductive material (e.g., metal) and is a component that prevents the elements of the photodetector 12 from generating noise due to external electromagnetic waves. The source of electromagnetic waves is an electrical component such as a drive unit that drives the wipers provided on the vehicle 40. The shielding case 1031 has a partition wall that separates the space in which the first photodetector 122 is housed from the space in which the second photodetector 124 is housed. This partition wall also hinders the propagation of pulsed light. In this way, the signals output by the first photodetector 122 and the second photodetector 124 are less susceptible to electromagnetic noise than when they are not shielded with a conductive material. Furthermore, the presence of the partition reduces the likelihood that light transmitted through the first wavelength selection unit 121 will be received by the second light-receiving element 124, and that light transmitted through the second wavelength selection unit 123 will be received by the first light-receiving element 122.

[0189] In the second circuit board 1030, the GPS receiver 16 and speaker 14 are mounted in the second region Ar4. The second region Ar4 is shorter vertically than the first region Ar3 and protrudes upward from the first region Ar3. In the GPS receiver 16, the GPS module is mounted on the first front surface and the GPS antenna is mounted on the second rear surface. To ensure upward directivity for the GPS antenna, it is positioned above the microwave receiver 15. Also, to secure space for the GPS receiver 16, the second region Ar4 in the second circuit board 1030 protrudes upward from the first region Ar3. The microwave receiver 15 is located below the GPS receiver 16 and speaker 14. The mounting section 21 is mounted on the left side of the first circuit board 1010. Below the mounting section 21 are the power switch 221, DC jack 222, and button battery 223 of the power supply unit 22. The button battery 223 is the internal power supply for the electronic device 10. Furthermore, the wireless module 171 of the communication unit 17 is mounted on the front side of the second substrate 1030, opposite to the first region Ar3.

[0190] Figure 58 shows a photograph of the second substrate 1030. Figure 58(a) is a view from the rear, and Figure 58(b) is a view from the front. In Figure 58(a), the GPS receiver 16 is mounted in the area indicated by "(16)", and the speaker 14 is mounted in the area indicated by "(14)". In addition, the light receiving unit 12 is mounted in the area enclosed by the white line on the second substrate 1030. Figure 59 shows the electrical configuration of the light receiving unit 12. The first light receiving element 122 is here a photodiode PD1. Light is incident on the light receiving surface of the photodiode PD1 via the first wavelength selection unit 121. The cathode of PD1 is connected to the high-potential power line, and the anode is connected to one end of resistor R1. The other end of resistor R1 is grounded. The input terminal of amplifier IC1(1 / 2) is commonly connected to the anode of photodiode PD1 and one end of resistor R1. The output terminal of amplifier IC1(1 / 2) is connected to the negative input terminal of differential amplifier AMP. The second photodetector 124 is a photodiode PD2. Light is incident on the photodiode PD2 via the second wavelength selector 123. The cathode of photodiode PD2 is connected to the high-potential power line, and its anode is connected to one end of resistor R2. The other end of resistor R2 is grounded. The input terminal of amplifier IC1(2 / 2) is commonly connected to the anode of photodiode PD2 and one end of resistor R2. The output terminal of amplifier IC1(2 / 2) is connected to the positive input terminal of differential amplifier AMP. Amplifier IC1(1 / 2) and amplifier IC1(2 / 2) output their outputs at half their original output. A signal corresponding to the difference in the amount of light received by photodiodes PD1 and PD2 is output from the output terminal of differential amplifier AMP. The control unit 11 detects the speed measuring device 30 based on this difference. The control unit 11 is amplified by a differential amplifier AMP, and after passing through amplifier Q1 and amplifier IC2(2 / 2), it detects the speed measuring device 30 based on the waveform-shaped signal.

[0191] Figure 60 is a graph showing an example of the filter characteristics of the first wavelength selector 121 and the second wavelength selector 123. The first wavelength selector 121 is a band-pass filter. As shown in Figure 60(a), it transmits light in the wavelength range including the target wavelength λout 905 nm and blocks light in other wavelength ranges. The width of the wavelength range through which light is transmitted is, for example, 20 nm, but it is more desirable for it to be narrower. The second wavelength selector 123 is, for example, a band-elimination filter. As shown in Figure 60(b), the second wavelength selector 123 blocks light in the wavelength range including the target wavelength λout and transmits light in other wavelength ranges that are not the target wavelength. The width of the wavelength range through which light is blocked is, for example, 20 nm, but it is more desirable for it to be narrower.

[0192] In Figure 60, the transmittance in the frequency range where light passes through is greater than 80%, and the transmittance in the frequency range where light is blocked is less than 15%. However, any transmittance that is practically acceptable is sufficient. The wavelength selector section should preferably exhibit a steep characteristic as illustrated in Figure 60, but it may also exhibit a broader characteristic.

[0193] When the second circuit board 1030 is further removed from the electronic device 10, the state shown in Figure 61 is obtained.

[0194] [8. Other examples of electronic devices] Figure 62 is a perspective view showing the external configuration of electronic device 80, which is another example of electronic device. Figure 63 is a perspective view showing the external configuration of electronic device 80 when viewed from the right front side with respect to the direction of travel of the vehicle. As shown in Figures 62 and 63, electronic device 80 is a box-shaped device with a roughly rectangular parallelepiped shape. Electronic device 80 does not have a display unit 13 and outputs various signals to external devices via a wired cable 81. Electronic device 80 may communicate with external devices via a wireless communication channel. Electronic device 80 is divided into a first housing 801 located above and a second housing 802 located below. A lid 803 is provided on the front side of electronic device 80. The lid 803, like the lid 1003, is a light-transmitting member formed of a material that transmits pulsed light.

[0195] Figures 64, 65, and 66 are perspective views showing the internal configuration of the electronic device 80. As shown in Figures 63-65, inside the electronic device 80, the first circuit board 810, the second circuit board 820, and the third circuit board 830 are arranged from bottom to top, spaced apart from each other. The button battery 811 is provided on the first circuit board 810 and is the internal power source of the electronic device 80. What distinguishes it from conventional electronic devices is that the light-receiving unit 841 is formed on the fourth circuit board 840 to receive pulsed light from the front of the vehicle's direction of travel, and the antenna unit 850 of the microwave receiving unit is arranged adjacent to it. The light-receiving unit 841 may have the same configuration as the light-receiving unit 12 and is electrically connected to the fourth circuit board 840. The fourth circuit board 840 is electrically connected to the first circuit board 810 via terminals not shown. The antenna unit 850 is the part of the microwave receiving unit that functions as an antenna. The antenna unit 850 is composed of a predetermined pattern formed on the circuit board. The processing circuit 851, which processes signals from the antenna section 850 of the microwave receiving section, is mounted on the second board 820. The GPS receiving section 860 is mounted above the third board 830. Under this configuration, the electronic device 80 performs notification control, outputting notifications using sound and displays to an externally connected output destination (for example, a conventional laser detector) via cable 81 to provide information. The functions related to this notification can be the same as those of the electronic device 10. The antenna section 850 is positioned adjacent to the fourth board 840. It is preferable that the normal direction of the antenna section 850 and the normal direction of the fourth board 840 intersect, but it is especially preferable that they be parallel.

[0196] In this way, it is possible to provide a technology that notifies users of the presence of a speed measuring device while minimizing changes from the existing system.

[0197] [9. Noise Reduction Methods] If the noise source is the circuit of the light-receiving unit 12 itself, lowering the amplifier gain to reduce the noise floor is an effective method. Conversely, improving the C / N ratio in the light-receiving unit allows for an increase in amplifier gain, which is desirable. Noise can originate from the amplifier circuit itself, and this is random noise. The amplifier circuit refers to the circuit portion rather than the photodiode. Therefore, to suppress noise, it is advisable to adopt a configuration in which the output of the light-receiving unit 12 is fed into two sets of amplifier circuits (amplifier circuit 1 and amplifier circuit 2). In this example, as shown in Figure 67, if we consider the noise peak exceeding the threshold Th of amplifier circuit 1 as peak N1, the signal peak when pulsed light is received as peak P1, the noise peak exceeding the threshold Th of amplifier circuit 2 as peak N2, and the signal when pulsed light is received as peak P2, then the probability that N1 and N2 coincide in time is very low, and P1 and P2 coincide. Therefore, if we consider the simultaneous detection of both N1 and N2 as the reception of pulsed light, it is thought that the noise reduction will be mitigated and the detection accuracy will improve. As shown in Figure 67, by using (P1+P2) / 2, if the peak values ​​exceeding the thresholds of the two circuits are out of sync, the peak values ​​can be reduced by adding them together and dividing by 2. A comparator may be used to determine whether or not such a peak value misalignment exists.

[0198] In this embodiment, since amplifier Q1 is the source of noise, it is preferable to configure amplifier Q1 to be replaceable with the amplifier of circuit 1, the amplifier of circuit 2, and a circuit that halves their outputs. Alternatively, an integrating circuit may be provided in the light receiving section 12. Alternatively, circuit 1 may be integrated using an integrating circuit with a capacitor or the like, while circuit 2 remains unchanged and a comparator is provided.

[0199] [10. Other Embodiments] (10-1) The electronic device 10 may be a system that issues an alarm when detecting a pattern of a reflective material that appears to have a police officer. The pattern of the reflective material is a pattern of the reflective material arranged at a predetermined location where a police officer is present. This pattern may be a pattern used for a predetermined signboard or a police officer's uniform. The electronic device 10 may use the in-vehicle camera 50 to acquire an image of the front of the vehicle 40, analyze this image, and detect the presence of a predetermined reflective material pattern. In this way, it is possible to notify the presence at a location where there is a high possibility of a police officer, and the possibility of false notification can be reduced. The alarm may be performed by display, sound, or a combination of these.

[0200] (10-2) In (10-1), it is preferable that the alarm is a speed limit enforcement alarm. The speed limit enforcement alarm may be an alarm indicating that it is approaching a speed limit enforcement location.

[0201] (10-3) As the pattern of the reflective material that appears to have a police officer as the detection target, a pattern including at least two or more of a horizontal line corresponding to the position of a person's waist, a vertical line corresponding to a police baton, a line corresponding to the horizontal position of a helmet, a line corresponding to a tasuki, and a line corresponding to the V shape of a vest may be used. For example, it is preferable that the lines are detected in the order of diagonal, horizontal, and vertical from above in particular.

[0202] (10-4) The electronic device 10 may perform the detection of the pattern of the reflective material that appears to have a police officer based on the detection of the reflection level corresponding to the retroreflective tape.

[0203] (10-5) The electronic device 10 may suppress the detection as a pattern of the reflective material that appears to have a police officer at a position higher than a person's height. As a suppression method, it is possible to not detect a portion above a certain height in advance. Also, even if the pattern is detected, it is not detected if it is above a certain height. Also, it may be a condition that all components of the pattern of the reflective material are included in the vertical height of a person (for example, within 2 m, etc.).

[0204] In (10-5), the electronic device 10 should also exclude the position corresponding to the road surface to prevent misinterpretation of stop lines on the road surface. Stop lines on the road surface consist of vertical and horizontal lines and may have a similar amount of light as retroreflection, so they should be excluded.

[0205] (10-6) The electronic device 10 may store location information of places where a reflective material pattern that makes it appear as if a police officer is present is pre-installed, and suppress the alarm at the stored locations.

[0206] (10-7) The electronic device 10 may change the manner of the alarm depending on the number of reflective material patterns detected that appear to indicate the presence of a police officer. For example, when one reflective material pattern that appears to indicate the presence of a police officer is detected, the enforcement alarm is not issued, and when multiple reflective material patterns that appear to indicate the presence of a police officer are detected, the enforcement alarm is issued.

[0207] (10-8) The electronic device 10 may suppress the alarm if only one reflective material pattern that appears to indicate the presence of a police officer is detected within a predetermined time. The electronic device 10 may decide whether to issue an alarm based on the number of detections within a predetermined time window. The predetermined time should be approximately 2 seconds.

[0208] (10-9) The electronic device 10 may detect the reflective material pattern that makes it appear as if the police officer is present based on the video signal captured by the camera installed in the drive recorder. This may allow detection from a distance greater than the detection range of pulsed light.

[0209] (10-10) The electronic device 10 should not perform the detection of the reflective material pattern that makes it appear as if a police officer is present in the rear, nor in the front in the passing lane, but rather in the left side of the driving lane.

[0210] (10-11) The electronic device 10 is equipped with a function to issue an alarm when it detects electromagnetic waves (e.g., pulsed light or microwaves) for measuring the speed of a vehicle traveling on a road. Even if it detects a reflective material pattern that makes it appear as if a police officer is present, if it also detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, the alarm for detecting electromagnetic waves for measuring the speed of a vehicle traveling on a road should be given priority, and the alarm for detecting a reflective material pattern that makes it appear as if a police officer is present should be suppressed.

[0211] (10-12) The electronic device 10 has a function to issue an alarm when it detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, and when it detects a reflective material pattern that makes it appear as if a police officer is present, and also detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, it is preferable to issue a different alarm than the alarm issued when it is detected alone (in particular, an alarm indicating a higher degree of urgency).

[0212] (10-13) The electronic device 10 may be equipped with an infrared detection device for detecting the presence or absence of objects, and may also be equipped with a function to determine (predict) the type of enforcement in conjunction with the detection of a reflective material pattern that appears to indicate the presence of a police officer. If there is no person and reflective material is present, it is highly likely to be just a speed camera. If there is a person and reflective material is present, it is highly likely to be a wide range of enforcement, including speed cameras. The control unit 11 may provide information based on the determination result of such a type. The notification may be different in either display or sound.

[0213] (10-14) The electronic device 10 should determine that if it recognizes a moving object that matches the Night Police pattern, it is a police officer rather than a Night Police sign. The control unit 11 calculates this by canceling out the vehicle's own behavior.

[0214] (10-15) Electronic device 10 shall have a function to suppress (e.g., not execute) night police warnings during the daytime (or when it is bright). It would be particularly good if it did not even process the recognition of night police signs.

[0215] [11. Other Embodiments] Furthermore, other embodiments will be described. Section [11. Other Embodiments] may include configurations based on ideas common to those described in other sections.

[0216] The electronic device 10 may have a protruding portion used for receiving pulsed light from the speed measuring device 30. For example, the electronic device 10 may have a shape in which at least a portion of the light-receiving unit 12 is provided protrudes more than other portions. A specific embodiment of such a configuration will be described below.

[0217] (11-1) The electronic device 10 may have a light incident part at a position that protrudes forward from the rear or side of the housing in the direction of travel of the vehicle (for example, in the direction normal to the display screen of the display unit). The incident part is the part of the electronic device 10 into which light received by the light receiving unit enters. The incident part is a part included in the external appearance of the electronic device 10. For example, the part of the electronic device 10 in which the cover portion 1003 described above is provided is an incident part, and the part in which the first window 101 or the second window 102 is provided is also an incident part.

[0218] This configuration allows for light reception at a more forward position, making it less susceptible to interference from obstacles that block the laser beam. In particular, when the system is configured to receive light that has passed through the windshield, the influence of light from the speed measuring device 30 refracted by the windshield can be reduced by positioning the incident part closer to the windshield. Especially when the display unit and the light receiving unit are integrated into a single housing, this configuration allows for simple and easy installation inside the vehicle, while also mitigating the aforementioned interferences.

[0219] In the example shown in Figure 68(a), the rear surface 1004 of the housing 100 of the electronic device 10 is provided with a first portion 10041 and a second portion 1042 that protrudes further forward in the direction of vehicle travel than the first portion 1041. The first portion 1041 is flat. The second portion 1032 is hemispherical in this case. Part or all of the second portion 1042 corresponds to the inlet portion.

[0220] The second part 1042 may be located, for example, above the center in the vertical direction of the rear surface 1004. There is a possibility that it is less likely to be affected by obstacles that block the light from the speed measurement device 30 compared to the case where it is below. The second part 1042 is provided on the right side of the center in the left - right direction of the rear surface 1004 when viewed from the rear side (it is preferably the side where the passenger compartment exists) in the traveling direction of the vehicle. Or, the second part 1042 may be provided on the left side of the center in the left - right direction of the rear surface 1004 when viewed from the rear side in the traveling direction of the vehicle. In this case, the incident part is located at a position closer to the speed measurement device 30 and on the left side in the traveling direction of the vehicle, which may be desirable from the viewpoint of light reception.

[0221] (11 - 2) The electronic device 10 may have an incident part at a position protruding from the rear surface or the side surface of the housing to the left side (or a direction parallel to the display screen of the display part) with respect to the traveling direction of the vehicle.

[0222] (11 - 3) The electronic device 10 may have an incident part at a position protruding from the rear surface or the side surface of the housing to the front - left direction (or a direction that intersects the normal line of the display screen of the display part 13 and is to the left) in the traveling direction of the vehicle. In this case, the incident part preferably has a surface with the diagonal left direction as the normal line direction.

[0223] In the example of FIG. 68(b), on the rear surface 1004A of the housing of the electronic device 10, a first part 1041 and a second part 10042A protruding to the front - left direction in the traveling direction of the vehicle with respect to the first part 1041A are provided. The second part 1042A is prismatic here. A part or all of the surface 1043 on the tip - side of the second part 1005B corresponds to the incident part. The surface 1043 is not a surface parallel to the first part 1041 and faces in a diagonal direction with respect to the traveling direction of the vehicle. In this case, the incident part is located at a position closer to the speed measurement device 30 and on the left side in the traveling direction of the vehicle, which may be desirable from the viewpoint of light reception.

[0224] Surface 1043 may be a flat surface, for example, but it may also include a curved portion facing forward and to the left (for example, it may include an arc or a sphere as the curved surface). The position on the back surface 1004A where the second portion 1042A is provided can be modified in various ways, similar to the position on the back surface 1004 where the second portion 1042 is provided.

[0225] Under this configuration, at least one of the light-receiving elements of the light-receiving section 12 may be provided inside the second section 1042A and arranged in the direction facing the surface 1043.

[0226] In configurations (11-1) to (11-3), the length in the protruding direction of the portion protruding from the rear of the housing (for example, the second portion 1042, 1042A) may be less than or greater than the thickness of the housing of the electronic device 10. In the example of Figure 69(a), the rear surface 1004B of the housing 100 of the electronic device 10 is provided with a first portion 1041 and a second portion 1042B that protrudes further forward in the direction of vehicle travel than the first portion 1041. The length in the protruding direction of the second portion 1042B is less than the thickness of the housing. In the example of Figure 69(b), the rear surface 1004C of the housing 100 of the electronic device 10 is provided with a first portion 1041 and a second portion 1042C that protrudes further forward in the direction of vehicle travel than the first portion 1041. The length in the protruding direction of the second portion 1042D is greater than the thickness of the housing.

[0227] In configurations (11-1) to (11-3), the portion protruding from the back of the housing may be rectangular, cubic, cylindrical, or other columnar in shape. The tip of this protruding portion may be a flat surface, an inclined surface tilted relative to the surface of the first portion 1041, a curved surface, or other shaped surface. At least a portion of the protruding portion may be shaped like a semi-circular arch, a sphere, a triangular prism, a lens, a prism, etc., to change the optical path or provide light focusing capabilities. A sensor may be placed at the destination of the changed optical path or light focusing.

[0228] (11-4) The incident part may be provided separately from the housing 100. The incident part may be provided in a part that is in physical contact with the housing 100, or in a part that is not in contact with it. For example, it is sufficient if the light incident on the incident part is received by the light receiving part, and a signal corresponding to the received light is supplied to the control unit 11. In this way, even if there are constraints on the position or orientation of the housing 100 from the viewpoint of the visibility of the display unit 13, for example, the position or orientation of the incident part can be adjusted so that it is easy to receive light from the speed measuring device 30.

[0229] The electronic device may include a connector for connecting wiring that outputs a signal corresponding to light received from the "separate unit" described above, and the control unit may perform notification control based on the signal corresponding to the light received and input via the connector.

[0230] As a "separate component" of (11-5) and (11-4), the inlet portion may be provided on a mounting member attached to the vehicle. In this case, the mounting member may be provided at the position of the inlet portion of (11-1) to (11-3). In this case, the mounting member may be attached to the housing by adhesive, fasteners or other methods.

[0231] As a "separate component" of (11-6) and (11-4), it would be appropriate to use a dashcam.

[0232] The "separate part" in (11-7) and (11-4) may be a mounting part for the drive recorder. This mounting part is a part for attaching the drive recorder to a predetermined mounting location on the vehicle. The mounting part may include, for example, a part that is physically connected to the drive recorder, and for example, a part that makes surface contact with the mounting location. The mounting member may be, for example, attached to the windshield of the vehicle, and may have an incident part on the mounting surface side of the windshield.

[0233] (11-8) The configuration is not limited to one in which the housing is equipped with a function for notification control, but the housing may also be equipped with a drive recorder function.

[0234] (11-9) The injection unit may be configured to be detachably attached to the housing. For example, the housing may be provided with a mounting portion for attaching the injection unit. The mounting portion may be provided with a fixing portion for fixing the injection unit.

[0235] (11-10) It is preferable to provide an adjustment means for adjusting the orientation of the incident part relative to the housing. The adjustment means may have a structure similar to that of adjusting the orientation of the camera in a mirror-type drive recorder. Alternatively, the housing may be equipped with a camera, and the orientation of the camera and the incident part may be adjusted independently.

[0236] (11-11) In the electronic device 10, the control unit 11 should record video and values ​​from various sensors before and after it determines that light has been received from the speed measuring device 30. The control unit 11 should also record information on whether or not the area in which the vehicle is located is within a predetermined area such as zone 30.

[0237] (11-12) In the electronic device 10, the control unit 11 is configured to record setting information related to notification (e.g., alarm) when light is received from the speed measuring device 30, along with its location information, etc.

[0238] (11-13) In a configuration in which the electronic device 10 performs notification control when it receives a predetermined radio wave (for example, microwave), the incident part is preferably positioned forward of the microwave receiving part 15 in the direction of travel of the vehicle. Here, being positioned forward means that the incident part is configured to protrude forward of the microwave receiving part 15.

[0239] (11-14) In a configuration in which the electronic device 10 performs notification control when the position information acquired from the GPS receiver 16 satisfies predetermined conditions, the inlet is positioned forward of the GPS receiver 16 in the direction of travel of the vehicle. Here, being positioned forward means that the inlet is configured to protrude forward of the microwave receiver 15. Here, the predetermined conditions may be that the current position indicated by the position information acquired from the GPS receiver 16 and the position indicated by the position information stored in the storage unit 18 are in a predetermined proximity relationship.

[0240] (11-15) In a configuration in which the electronic device 10 includes a light-emitting section 23 and other light-emitting sections, the incident section should be provided on the side opposite to the side on which the light-emitting section is provided. If the light-emitting section is provided on the front side of the housing 100, the light-emitting section should be provided on the rear side.

[0241] (11-16) The portion into which light enters to obtain the second amount of light corresponding to the second window 102 (hereinafter referred to as the "second incident portion") should be provided within the protruding portion in which the incident portion is provided. In this case, the second incident portion should be provided within the protruding portion in which the incident portion is provided, in the same orientation as the incident portion. Alternatively, the second incident portion should be provided within the protruding portion in which the incident portion is provided, in an orientation different from that of the incident portion.

[0242] (11-17) The second injection section may be provided in a part of the housing different from the protruding portion where the injection section is provided. The second injection section may be provided within the protruding portion where the injection section is provided, in the same orientation as the injection section. The second injection section may also be provided within the protruding portion where the injection section is provided, in an orientation different from that of the injection section.

[0243] (11-18) When the electronic device 10 has a predetermined proximity to at least one of the following: Zone 30, a single-lane road, a school, a kindergarten, or a nursery school, the control unit 11 of the electronic device 10 should increase the likelihood that it is a speed measuring device 30 or decrease the likelihood that it is a source of a false alarm when it determines that pulsed light has been received. Zone 30 is an area where a speed limit of 30 km / h is imposed in order to restrict the speed of vehicles traveling within the area and to control through traffic.

[0244] Optical speed measuring devices come in portable and fixed types, but portable devices are often moved and set up irregularly in various locations for measurement, requiring drivers to pay more attention. However, this method allows for more reliable notification in such locations. Furthermore, even if the possibility of false alarms increases in such locations, the inventors have found that these locations are particularly prone to accidents, so even if the possibility of false alarms increases, it can raise drivers' awareness of safety in such places.

[0245] (11-19) The control unit 11 of the electronic device 10 should increase the likelihood that it is a speed measuring device 30 or decrease the likelihood that it is a source of a false alarm when it determines that at least one of the following conditions is met: a predetermined time of day such as late at night, a predetermined weather condition such as bad weather, or driving on a predetermined road such as a multi-lane road.

[0246] The inventors found that portable devices are often not used for measurements in these situations because the possibility of mismeasurement increases. This approach can reduce false alarms, especially in these situations. In particular, in these situations, the possibility of false alarms increases because light from other vehicles, such as headlights, is more likely to enter the light-receiving part directly or indirectly through diffuse reflection, but this approach can reduce this problem as well.

[0247] (11-20) The second light-receiving element 124 may be used to detect the state of light other than the light from the speed measuring device 30. The control unit 11 of the electronic device 10 may detect the state of light other than the light from the speed measuring device 30 based on the light received by the second light-receiving element 124. The control unit 11 may, for example, have a function to change the brightness of the screen / light-emitting element (LED, etc.) according to the amount of ambient light, a function to switch the screen between daytime display and nighttime display, a function to detect whether the vehicle is driving in a tunnel, and a function to detect whether the wipers are moving. To determine whether the wipers are moving, it may be possible to detect whether the wipers are on Hi or Low based on the periodicity of light blocking.

[0248] In this way, if the electronic device 10 has a function to detect the light conditions around it and perform control based on the detection results, it becomes unnecessary to provide a separate sensor to detect the light conditions around the electronic device 10, thereby reducing costs and making it easier to miniaturize the device (housing).

[0249] (11-21) As previously explained, it is preferable for the light-receiving unit to be located outside the vehicle and the part that realizes the notification control function to be located inside the vehicle. Further, the following is preferable. The light-receiving unit should be located within the width range in the height direction of the vehicle's wheels (especially within the width range of the height of the license plate) and towards the front of the vehicle. The light-receiving unit may be installed on a camera installed outside the vehicle to capture images of the front or left front of the vehicle (in which case, a part of the left side may be included), or it may be configured to be installable adjacent to the camera. Preferably, the image captured by the camera and the signal corresponding to the light received by the light-receiving unit should be routed through a single cable. In this case, it is preferable that both signal lines be enclosed in the same sheath.

[0250] (11-22) The light-receiving unit should be located in front of the driver's seat inside the vehicle and at a height that includes the same height range as the material through which light is transmitted from outside the vehicle to the inside of the vehicle. This reduces the obstruction of light by the wipers on sunny days and enables more reliable detection.

[0251] The light-receiving unit should be positioned so as not to interfere with the initial position of the wiper as seen from inside the vehicle. The light-receiving unit should be positioned as low as possible on the vehicle. This reduces the obstruction of the forward view while driving and minimizes the obstruction of light from the speed measuring device 30, allowing for more reliable detection of the speed measuring device 30. The light-receiving unit can be positioned, for example, at the location of the license plate. The light-receiving unit should be positioned on the left side in the direction of travel of the vehicle. Since the light from the speed measuring device 30 is emitted diagonally from the left-hand sidewalk towards the vehicle, the possibility of it being obscured by the shadow of a preceding vehicle can be reduced. In particular, when driving with a preceding vehicle a few meters in front of the vehicle, the possibility of the light emitted diagonally from the left-hand sidewalk towards the vehicle being obstructed by the preceding vehicle and failing to be detected can be reduced. Furthermore, when the distance between the vehicle and the preceding vehicle changes, fluctuations in the detection of light from the speed measuring device 30 can be reduced.

[0252] The control unit 11 of the electronic device 10 may provide notification that it will be difficult to receive light from the speed measuring device 30 when the distance to the preceding vehicle is in a predetermined close state. The control unit 11 may change the settings related to the sensitivity of receiving light from the speed measuring device 30 depending on whether the distance to the preceding vehicle is in a predetermined close state or not. For example, the sensitivity may be increased when the distance to the preceding vehicle is in a predetermined close state compared to when it is not.

[0253] (11-23) The control unit 11 determines that the light is from the notification target object when it matches or is similar to the light pattern emitted from the speed measuring device 30. It may also determine that the light is not from the notification target object when it does not match or is not similar to this pattern. The light pattern emitted from the speed measuring device may be determined by the logic of the program. Information regarding the light pattern may be stored in advance in the storage means (for example, storage example 1: parameters from (11-24) to (11-26) below, storage example 2: information regarding the degree of change in light intensity over time from (11-24) to (11-26) below, etc.), and it may be determined whether it is similar to the stored pattern.

[0254] (11-24) The control unit 11 of the electronic device 10 may determine that the speed measuring device 30 is present when it receives light that changes between on and off at predetermined time intervals (for example, intervals of several tens of microseconds). The control unit 11 may not determine that the speed measuring device 30 is present when any other type of light is received. In this case, the on time may be on the order of nanoseconds, for example, and the off time may be on the order of several tens of microseconds.

[0255] The control unit 11 of the electronic device 10 may determine that the light is from the speed measuring device 30 when it detects that the device is periodically turned on for a predetermined on-time (for example, a very short time) and then turned off for a predetermined off-time that is longer than the predetermined on-time (a much longer time than the aforementioned very short time). The control unit 11 of the electronic device 10 may determine that any other light is not from the speed measuring device 30.

[0256] (11-25) The control unit 11 of the electronic device 10 may determine that the speed measuring device 30 is present when it receives light in which the amount of light changes periodically at predetermined time intervals (for example, several tens to several hundred ms) (for example, swept horizontally (left and right)). The control unit 11 may not determine that the speed measuring device 30 is present when it receives any other type of light.

[0257] In the configurations of (11-26), (11-24), and (11-25), the control unit 11 may determine that the speed measuring device 30 is present based on the light received at multiple timings. For example, if the control unit 11 determines that the speed measuring device 30 is present based on the light received at a predetermined number of timings, then the speed measuring device 30 is ultimately considered to be present.

[0258] (11-27) An electronic vehicle device (e.g., warning device) comprising an antenna unit and a display unit in separate housings, wherein the antenna unit is electrically connected to the display unit, and the display unit performs predetermined notification control (e.g., warning) based on signals received by the antenna unit, wherein a light receiving unit is provided in the housing of the antenna unit, or in a housing separate from the housing of the antenna unit and the housing of the display unit, and the display unit may have a function to provide notification (e.g., warning) regarding optical vehicle speed measurement based on signals regarding the light receiving state of the light receiving unit from the housing housing the light receiving unit. The antenna unit may be either the antenna of the GPS receiver or the antenna of the microwave receiver, or both. The antenna unit may be connected to the monitor unit by wire or wireless. The light receiving unit may have the same configuration as the light receiving unit 12, and is a light receiving unit for receiving light from the speed measuring device 30.

[0259] The housing of the antenna unit equipped with the light-receiving unit described in (11-28)(11-27), or the other housing equipped with the light-receiving unit, may be provided with a security function that causes a light-emitting element (e.g., an LED) to flash while the vehicle is stopped (e.g., a dummy light). The light-emitting element may be provided on the top surface of the housing, and the light-receiving unit may be provided on the rear side.

[0260] The "electrical connection" in (11-29) and (11-27) is performed by wire, and a relay unit having another housing is provided between the antenna unit and the display unit, and the relay unit has the function of supplying power to the electronic circuit of the housing having the light receiving unit and relaying the signals of the electronic circuit of the housing having the light receiving unit to the display unit.

[0261] (11-30) In a configuration comprising a GPS receiver antenna (i.e., a "GPS antenna"), a microwave receiver antenna, and a light receiver, it is preferable that the GPS antenna be positioned at the top of these components.

[0262] (11-31) In a configuration comprising a GPS antenna, a microwave receiver antenna, and a light receiver, the microwave receiver antenna and light receiver should be positioned in a location forward of the GPS antenna in the direction of travel.

[0263] (11-32) In a configuration that includes an antenna and a light-receiving unit for microwave reception, it is preferable to arrange them side by side in the left-right direction. In this case, it is preferable that they do not overlap in the vertical direction.

[0264] (11-33) In a configuration comprising a microwave receiver and a light receiver, the light receiver should be positioned above the antenna of the microwave receiver.

[0265] (11-34) The electronic circuit of the housing having a light-receiving unit should be equipped with a function to connect to a drive recorder, and the drive recorder should be equipped with a function to record video when light from the speed measuring device 30 is received by the light-receiving unit. The display unit should be equipped with a function to play back the recorded video when light from the speed measuring device 30 is received. This video is, for example, video from a predetermined period of previously recorded video.

[0266] (11-35) Electronic devices should be configured to receive light using optical fibers or other light-guiding tubes or other light-guiding members. For example, the GPS antenna, the microwave receiver antenna, and the light-receiving unit may not be able to be placed in ideal positions.

[0267] (11-36) Figure 70(a) shows an example of such a configuration. In this example, within the housing 1051, the microwave receiver antenna 1053 is positioned on the substrate 1052 on the front side in the direction of vehicle travel, and the light receiving unit 12 is positioned behind it. The GPS antenna 1054 is positioned so as to overlap the light receiving unit 12 in the vertical direction. The light guide member 1055 is positioned on one side of the antenna 1053 in the direction of vehicle travel. Light incident on the vehicle-front end face of the light guide member 1055 is guided to the opposite end face. The light receiving unit 12 faces the opposite end face. The light receiving unit 12 receives light emitted from the opposite end face. Note that the light guide member 1055 only needs to be positioned so that light from the front side in the direction of vehicle travel can be incident on it, and the arrangement of each member is not limited to the example described in Figure 70(a). Figure 70(b) is a view of this electronic device from above. As shown in Figure 70(b), the mounting problem can be improved if the light guide member 1055 is positioned to be rotatable around the rear axis 1056.

[0268] In addition, in the above explanation, where the components were positioned on the left side to account for light reception from the speed measuring device located on the left side, it may be reinterpreted as a configuration where the components are positioned on the right side, considering the possibility of light reflected from the median strip, etc.

[0269] (11-36) The light-receiving sensitivity of the visible light cut filter component, as exemplified by the lids 1003 and 803, changes depending on the surface condition. For example, the surface of the component may be a textured surface (a relatively rough surface), but it may also be a smoother surface (glossy and less rough) (for example, a polished surface), in which case an improvement in light-receiving sensitivity can be expected. In the case of a textured surface, light is diffused on the surface. It is thought that this effect makes it easier to obtain sensitivity even if the light-receiving direction is shifted laterally. On the other hand, the inventors thought that if the surface is polished, the light does not diffuse when it passes through the component that functions as a visible light cut filter, and the amount of light reaching the light-receiving part increases, thus increasing the sensitivity. Figure 71 shows the difference with and without textured processing.

[0270] In the case of a textured finish, it is advisable to ensure that the aesthetic appeal is not compromised. For example, it may be desirable for the inside of the casing to be invisible from the outside. If the area around the component that functions as a visible light cut filter has a textured finish or other pattern, the component itself should also have a similar pattern. The color of this part should be the same as the color of the casing when viewed from the outside, and should allow the light to be detected to pass through.

[0271] (11-37) The control unit 11 of the electronic device 10 may perform alarm control when it detects an image corresponding to the light from the speed measuring device 30 within the imaging area using a camera capable of imaging in the infrared region. The image corresponding to this light may be a flashing light (for example, an area with a small number of pixels (a range corresponding to a point)). The control unit 11 of the electronic device 10 may determine that the position of the image corresponding to this light in the captured image corresponds to the installation position of the speed measuring device. The control unit 11 of the electronic device 10 may also identify an area directly above the roadway and to the side of the driving lane (road shoulder position) using image recognition and determine whether there is a flashing light at that position.

[0272] (11-38) The visible light cut filter may be a separate component that passes through the lens after it, but it is preferable to make the lens itself out of a material that cuts visible light and not provide a separate visible light cut filter on the surface of the housing.

[0273] (11-39) It is preferable to provide an adjustment means that can adjust the orientation of the part where the incident part is provided (the protruding part described above). The adjustment means may be configured to change the orientation of the part where the incident part is provided when force is applied by a person's hand, and not change the orientation of the part where the incident part is provided when no force is applied by a person's hand. It is preferable that the adjustment means can be changed up, down, left, and right, but it is preferable that the orientation can be adjusted in the left and right directions at least. In particular, a display unit provided on the front of the housing and the adjustment means and incident part provided on the back of the housing yields excellent results. In particular, when installed on the right side in front of the driver's seat on the dashboard, the display unit is oriented so that the left side is forward so that the display screen is easy to see. In this case the light receiving unit will be facing the front right, making it difficult to receive light from the speed measuring device 30 which is often emitted from the front left side such as the roadside, but in this way the light receiving unit can be oriented in that direction, towards the direction of the light from the speed measuring device 30 which is often emitted from the front left side such as the roadside.

[0274] (11-40) The system should have a function to transmit information about the location where monitoring activity by the speed measuring device 30 was being conducted, based on instructions from the user or light received from the speed measuring device 30, to a server or other vehicle. In this case, the system should also have a function to transmit information about the location (for example, current location information from GPS) as well as information about the type of monitoring, such as that the location was where monitoring activity using light from the speed measuring device 30 was being conducted.

[0275] Furthermore, it is desirable to have a function that transmits information that distinguishes whether the post is from a user indicating a location where monitoring activities by the speed measuring device 30 were being conducted, or from an automatic post resulting from the reception of light from the speed measuring device 30. In addition, it is desirable to have a function that receives information posted to the server regarding locations where monitoring activities by the speed measuring device 30 were being conducted, and to have a function that notifies the user that the location is one where monitoring activities by the speed measuring device 30 were being conducted, as reported when the vehicle approaches the received location. At this time, it is desirable to receive information that distinguishes whether the post is from a user indicating a location where monitoring activities by the speed measuring device 30 were being conducted, or from an automatic post resulting from the reception of light from the speed measuring device 30, and to notify the user accordingly. The "approach of the vehicle to the received location" should be defined as approaching a distance longer than the detectable distance of the laser beam. For example, if the detectable distance of a normal laser beam is 500m, the determination of the vehicle approaching the received location should be set to 800m.

[0276] For example, after passing a location where monitoring activity by the posted speed measuring device 30 was being conducted, the system should have a function to notify the user whether or not monitoring activity by the speed measuring device 30 was being conducted, detect the user's voice or hand response, and send information to the server regarding whether or not monitoring activity by the speed measuring device 30 was being conducted at the location where the posted laser speed measuring device monitoring activity was being conducted. The system should also have a function to retrieve this information from the server and, for vehicles approaching that location, to notify them with additional information on whether or not monitoring activity by the speed measuring device 30 was being conducted, or to not notify them at all.

[0277] Alternatively, instead of transmitting the information to a server (for example, to a server connected to the internet via a wireless LAN and LTE wireless LAN router), or in conjunction with this, the information may be broadcast radio waves to the surrounding area or communicated with other radar detectors in the vicinity. This information may also be transmitted by relaying it between radar detectors in each vehicle using P2P or similar methods.

[0278] Regarding (11-41) and (11-40), the idea of ​​automatically posting and sharing data on the location of light reception from the speed measuring device 30 or the location of radar-type radio wave reception is considered a function that cannot be realized unless there is accurate registration of reception without misrecognition and a large number of users utilizing the network. Therefore, based on the idea that a system for posting to an SNS (Social Network System) can be used to allow many users to see the data, it may be configured as follows to promote the electronic device 10 or its provider (company) and ultimately lead to increased purchasing power. The SNS may be, for example, Twitter (registered trademark), Instagram (registered trademark), or other SNS.

[0279] When the control unit 11 of the electronic device 10 starts receiving pulsed light corresponding to the optical system or receiving radio waves corresponding to the radar system, it acquires an image captured by an in-vehicle camera (e.g., in-vehicle camera 50) and starts image recognition processing of the acquired image. This image recognition processing is the process of recognizing the image of the speed measuring device included in the captured image. The algorithm for the image recognition processing may be a known image recognition process. For example, image data showing images of optical and radar type speed enforcement devices are stored in the storage unit 18 in advance. The control unit 11 uses this image data to perform image recognition processing, for example, by pattern patching. Here, the control unit 11 may narrow down the image data used for image recognition processing depending on the form of pulsed light reception or radio wave reception. For example, if pulsed light is received, the control unit 11 may narrow down the image data to the image data of the optical system speed measuring device stored in the storage unit 18, and if radio waves are received, it may narrow down the image data to the image data of the radar system speed measuring device stored in the storage unit 18. The control unit 11 compares the image captured by the on-board camera 50 with the image shown by the filtered image data and determines whether a speed measuring device has been captured based on a value indicating the degree of similarity (in this case, a score value). The score value indicating the degree of similarity is, for example, larger the value the higher the degree of similarity. The score value is calculated using a known algorithm. For example, if the score value is above a threshold, the control unit 11 determines that a speed measuring device exists and proceeds with the posting process. For example, if the score value is below the threshold, the control unit 11 determines that a speed measuring device does not exist and does not proceed with the posting process. If the vehicle is not equipped with an image recognition camera such as the on-board camera 50, the control unit 11 determines whether there is any relevant public enforcement information or enforcement PoI (Point of Interest, i.e., enforcement location) when it starts receiving pulsed light or radio waves. If the control unit 11 determines that either of these exists, it proceeds with the posting process; otherwise, it does not proceed with the posting process.

[0280] The control unit 11 performs posting processing to post information such as location information indicating the position of the speed measuring device to the server via the communication unit 17. The control unit 11 generates data in a predetermined format, such as CSV (Comma-Separated Values), which includes, for example, latitude and longitude as location information indicating the position of the speed measuring device, date and time, type of electronic device 10 (e.g., manufacturer name, model or model number), name of the road being traveled, address of the current location, and comments for SNS, and uploads it to the server. Comments for SNS are, for example, a summary of the date and time, type of electronic device 10, name of the road being traveled, address of the current location, etc. To make the data sent from the electronic device 10 easier to handle, the server may sort the data, for example, by date and time and store it. The server automatically posts to SNS. The server may perform posting work while devising ways to gain followers by counting the number of people who agree with the post content (so-called "likes"). Captions and comments should use comments for SNS.

[0281] The control unit 11 of the electronic device 10 periodically monitors the server and, if the latest data has been updated, downloads the posted data and displays it on the map or as a ticker. This display can be turned on or off, and only the latest information can be displayed for those who want to see it. Here, for example, it displays "Wakkanai City, Hokkaido, with an icon on the map + ticker: National Route 238, portable speed camera enforcement in progress!"

[0282] Regarding the configurations of (11-42) and (11-41), the control unit 11 should continue to perform control to notify the presence of the speed measuring device 30 when the reception of pulsed light is interrupted after receiving the pulsed light, or when a vehicle ahead is recognized from the image of the on-board camera 50. In this way, the presence of the speed measuring device 30 can be notified even if the pulsed light from the speed measuring device 30 is blocked by the vehicle ahead.

[0283] Regarding the configurations of (11-43) and (11-41), the control unit 11 may upload to the server, along with location information, an image (e.g., a photograph) taken immediately before the detection ceased (e.g., immediately before passing the speed measuring device) when the intensity of pulsed light reception suddenly stops being detected from a state where it is above a predetermined level (e.g., when passing the location of the speed measuring device). In this way, the server can determine whether it is a false alarm or a real alarm by looking at the image. It is even better to upload the image taken by the rear camera to the server after the detection ceased (e.g., after passing the device). The control unit 11 may also configure other vehicle equipment (electronic devices 10 or on-board cameras) to take an image of the location of the speed measuring device and upload it automatically. In this case, the electronic devices 10 may distribute the location information of the speed measuring device to models without pulsed light reception capabilities and have them take a picture and upload it. Image information such as the timing of enforcement cancellation can be collected from many existing electronic devices. In this case, models with pulsed light reception capabilities should also upload the laser reception level.

[0284] (11-44) The control unit 11 may post on social media, either in the image of (11-43) or in its description, the manufacturer's logo or text of the electronic device 10, saying, "I'm so glad I had the XX radar~" (XX is the manufacturer's name). It is also good to include the type of electronic device 10 (for example, the model number). The control unit 11 may also include the vehicle speed at that time (for example, only if it was below the speed limit). The control unit 11 may also include the speed limit of the road. The control unit 11 may also include information about nearby facilities. For example, the control unit 11 might post, "I passed a laser speed camera near △△ with a speed limit of 60 km / h at 55 km / h. I'm so glad I had the XX radar~". The image should be a screenshot of the electronic device 10's screen. In particular, it should be a display screen with the image related to the electronic device 10's notification superimposed on the image captured by the drive recorder. At this time, it is preferable to use an image that mimics the outer frame of the radar screen (where the model name and function name are written) on the outside of the display screen (that is, an image of the casing of the electronic device 10 as seen from the front, representing the display area).

[0285] (11-45) The electronic device 10 may upload and share the locations where the notification was canceled by the cancellation function corresponding to the radar system to the above server via the network. In this way, false notifications can be prevented from the start even for automatic doors, etc., near roads that other users are driving on for the first time.

[0286] (11-46) Radar detectors may react to vending machines. Therefore, when an electronic device receives a specified radio wave (radar wave) while parked, it displays the message "Are there any vending machines nearby?" along with "Yes" and "No" buttons and accepts submissions. The electronic device sends the submitted data to a server. The server aggregates the submitted data and distributes it as a source of false alarms, such as vending machine points.

[0287] (11-47) By connecting the electronic device 10 to a drive recorder that supports mutual communication, power can be supplied to the drive recorder, and video / audio signals, operation signals, GPS information, and OBDII information can be communicated. Furthermore, it is equipped with an interlocking mode that automatically switches to the external input display when approaching a speed measuring device. When approaching a speed measuring device, the position of the speed measuring device's camera (for example, fixed in three patterns: top / left / right) is highlighted in red to notify the driver. The speed warning point alerts the driver at points where the maximum speed is likely to change and where enforcement is likely to occur. In addition, it is equipped with a normal / mirror image switching function, and the drive recorder can also be used as a backup camera.

[0288] [12. Other Embodiments] Regarding the configuration for widening the light acceptance angle of the photodetector by combining the lenses or mirrors described above, for example, the following configuration is adopted. Figure 72 is a diagram showing the configuration of the electronic device 10A of this embodiment as viewed from the upper right side of the rear. Figure 73 is a six-view drawing showing an example of the external configuration of the electronic device 10A of this embodiment. Figure 73 shows the front view, top view, right side view, bottom view, left side view, and rear view of the electronic device 10A. Hereinafter, elements that are the same as those described in [7. Mechanism of the electronic device 10] will be represented using the same reference numerals as those used in [7. Mechanism of the electronic device 10], and explanations will be omitted as appropriate.

[0289] The housing 100A of the electronic device 10A is divided into a first housing 1001 located on the front side and a second housing 1002A located on the rear side. The front of the first housing 1001 is provided with a display unit 13, a light-emitting unit 23, and an illuminance sensor 201 of the sensor unit 20. The display area of ​​the display unit 13 is located in the opening on the front of the first housing 1001. A speaker 14 is provided to output sound from the upper end surface of the second housing 1002A. A mounting section 21 (i.e., an SD card slot) for inserting an SD card is provided on the right end surface of housing 100A. A condensing lens 300 is provided in the upper right part of the back of housing 100A. A power switch 221 and a DC jack 222 of the power supply unit 22 are provided in the lower left part of the back of housing 100A.

[0290] A lens holder 1006 is provided on the rear of the second housing 1002A. The lens holder 1006 forms a window, which is an opening that allows the inside and outside of the housing 100A to pass through. When viewed from the rear side of the housing 100A, the lens holder 1006 has an elliptical shape with a major axis in the horizontal direction and a minor axis in the vertical direction. When the electronic equipment 10A is installed in a vehicle, the horizontal direction corresponds to the width direction of the vehicle, and the vertical direction corresponds to the height direction of the vehicle.

[0291] The focusing lens 300 is fitted into the lens holder 1006. The focusing lens 300 is part of the light receiving unit 400 and is positioned at a location corresponding to the light incident part described in the above embodiment. The lens holder 1006 and the focusing lens 300 are positioned towards the upper right of the second housing 1002A when viewed from the back of the second housing 1002A. For example, the focusing lens 300 is positioned on the back of the housing 100A at least above the center in the vertical direction and at least to the left of the direction of travel when viewed from the driver's seat side of the vehicle. This is because positioning the focusing lens 300 relatively high on the back of the second housing 1002A and on the shoulder side where the speed measuring device 30 is likely to be located makes it easier to receive light from the speed measuring device 30. The pulsed light Lout from the speed measuring device 30 is introduced into the housing 100A via the lens holder 1006 and the focusing lens 300. The condensing lens 300 is formed entirely of a light-transmitting material. The condensing lens 300 is transparent or translucent. The light-incident surface of the condensing lens 300 is aspherical and protrudes further back than the back surface of the housing 100A. The condensing lens 300 is an aspherical lens, and its configuration will be described in detail later. The condensing lens 300 is a lens that transmits at least pulsed light Lout and is made of a translucent or transparent material. This may contribute to the aesthetic appeal of the electronic device 10A.

[0292] Figure 74 shows the electronic device 10A with the second housing 1002A removed. Figure 75 shows the electronic device 10A with the condensing lens 300 further removed. Figure 76 shows the electronic device 10A with the filter 250 and shield plate 270 further removed.

[0293] A focusing lens 300 is provided in the second substrate 1030 at a position overlapping the first region Ar3. The focusing lens 300 is designed and manufactured to focus pulsed light Lout at a predetermined focal length position. The light-receiving element 410 receives the light focused by the focusing lens 300. The light-receiving element 410 is provided on the side of the second substrate 1030 opposite to the side with the focusing lens 300, in this embodiment, on the side where the first substrate 1010 is placed. Therefore, the light-receiving element 410 receives light that has passed through the light-transmitting portion 1033 provided in the second substrate 1030. The light-transmitting portion 1033 is a rectangular parallelepiped opening in this case. The light-receiving element 410 may be the same element as the first light-receiving element 122 or the second light-receiving element 124, but it differs from the above-described embodiment in that there is only one light-receiving element.

[0294] The filter 250 is an example of a wavelength selector corresponding to the first wavelength selector 121. The filter 250 is provided between the photodetector 410 and the focusing lens 300, and selectively transmits light of a specific wavelength λout from the incident light. The filter 250 can be removed in any configuration. The shield plate 270 is a shield made of, for example, aluminum or a conductive material, and is provided in a region surrounding three of the four sides of the light-transmitting section 1011. The shield plate 270 is intended to suppress the effects of static electricity and other factors on the photodetector 410 and other electronic components.

[0295] Figure 77 is a version of Figure 76 with the second substrate 1030 removed. The light-receiving element 410 is housed in a shield case 280. The shield case 280 is provided on the side of the first substrate 1010 opposite to the side with the condensing lens 300, and covers the entire light-receiving element 410. Such a shield case 280 performs the same function as the shield case 1031.

[0296] In this configuration, the light-receiving element 410 is positioned on the front surface of the electronic device 10A on the second substrate 1030. This arrangement allows for more reliable shielding in a simple manner, and because the first substrate 1010 is located between the light-receiving element 410 and the condensing lens 300, the space corresponding to the focal length can be effectively utilized. As a result, this contributes to the overall compactness of the housing 100. Similar effects can be expected if the light-receiving element 410 is positioned on the front or rear surface of the electronic device 10A on the first substrate 1010.

[0297] Figure 78 is a six-view drawing showing an example of the configuration of the focusing lens 300. The focusing lens 300 is an aspherical lens that focuses reflected light from the speed measuring device 30 and forms an image at a predetermined focusing position. The focusing lens 300 is an aspherical lens in which the light incident surface is aspherical. The focusing lens 300 includes an incident surface 310 and an exit surface 320. The incident surface 310 includes an aspherical curved surface 311 into which pulsed light from the speed measuring device 30 is incident. The incident surface 310 includes a curved surface 311 that is convex along the width direction of the vehicle. The curved surface 311 protrudes most at the center in the width direction of the vehicle. The curved surface 311 is also convex along the height direction of the vehicle. The curved surface 311 protrudes most at the center in the height direction of the vehicle. The curved surface 311 is, for example, parabolic, but any other shape consisting of a smooth curve is also acceptable.

[0298] The curved surface 311 has a length La in the width direction of the vehicle that is greater than its length Lb in the height direction. The curvature of the condensing lens 300 in the width direction of the vehicle is smaller than the curvature of the curve in the height direction of the vehicle. Thus, the condensing lens 300 curves more gently in the width direction of the vehicle than in the height direction of the vehicle.

[0299] The exit surface 312 is the surface from which light incident on the incident surface 310 (especially the curved surface 311) is emitted. The exit surface 312 is a flat surface. However, the exit surface 312 may be curved.

[0300] The focusing lens 300 guides pulsed light from the speed measuring device 30 to the position of the photodetector 410. The position of the focusing lens 300 is set according to its characteristics so that the light is focused to the position of the photodetector 410.

[0301] A flat surface 313 is provided around the curved surface 311 of the incident surface 310. Legs 314A and 314B are provided on a pair of opposing sides of the flat surface 313. The legs 314A and 314B are fixed to the first substrate 1010. Note that the flat surface 313 and the legs 314A and 314B are not essential components.

[0302] Because the condensing lens 300 in the above configuration is an aspherical lens, spherical aberration can be suppressed when imaging is performed by the photodetector 410 compared to when a spherical lens is used. The spot size obtained with an aspherical lens can be several orders of magnitude smaller than that obtained with a spherical lens. Based on this idea, it is conceivable that the condensing lens may be realized by a combination of multiple lenses that have less spherical aberration than a spherical lens.

[0303] When the speed measuring device 30 is located on the shoulder of the road, if the distance between the speed measuring device 30 and the vehicle is large, the pulsed light Lout is incident from almost directly in front, but as the vehicle approaches, the pulsed light Lout will be incident from the left. For this reason, the focusing lens 300 has a horizontal length La that is greater than Lb so that it can receive light at a wider receiving angle in the vehicle's width direction than in the vehicle's height direction. For example, the focusing lens 300 is designed to focus light incident at an incident angle of 40 degrees on both sides in the width direction and 20 degrees on both sides in the height direction. By relatively shortening the height direction length Lb of the curved surface 311, the focusing of light other than the pulsed light Lout is reduced. If the purpose is to receive light at a wide range of incident angles in the vehicle's width direction, the curved surface 311 may be flat along the vehicle's height direction.

[0304] Rather than positioning the photodetector 410 at the focal length of the condensing lens 300, it is preferable to position the photodetector 410 at a position shorter than the focal length. Because the curvature of the condensing lens 300 is small and bends light significantly, light around the condensing lens 300 tends to concentrate near the center of the optical axis, ahead of the focal length. By positioning the photodetector 410 ahead of the focal length, more light can be collected. In addition, light coming from a direction with a steep angle also passes near the center of the optical axis, ahead of the focal length. By positioning the photodetector 410 in front, light with a wide angle of incidence can be received.

[0305] The focusing lens 300 has characteristics that enable it to detect pulsed light from the speed measuring device 30 even if it is weak. As a result, the electronic device 10 can detect the presence of the speed measuring device 30 over an extremely wide area and long distance, and can quickly notify the device of its presence. In addition, as in the embodiment described above, a visible light cut filter may be provided on the incident surface side of the focusing lens 300, or the focusing lens 300 may be formed from a material that has a visible light cut function. This reduces the influence of visible light. The focusing lens 300 may also be an aspheric lens.

[0306] The focusing lens 300 may be positioned so that its optical axis is parallel to the front-rear direction of the vehicle, but it may also be tilted. In this case, if the optical axis of the focusing lens 300 is tilted to the left front with respect to the front-rear direction of the vehicle, it may be possible to receive pulsed light Lout from the speed measuring device 30 more easily.

[0307] The inventors conducted an experiment to confirm that an aspherical lens can receive light at a wide angle of incidence. As shown in Figure 79(a), a commercially available transparent acrylic half-round rod (radius 6.35 mm) was shaved down to a thickness of 3 mm and polished. A photodiode (PD) was used as the light-receiving element. The focal length was 3 mm at the back focus, and the lens was placed 1 mm above the light-receiving element to widen the upper field of view. Figure 79(b) is a table showing the relationship between the light source direction [deg] and the ATT value [dB] in this case. This confirmed that the horizontal acceptance angle, which is curved, is larger than the vertical acceptance angle.

[0308] Figure 80 shows an example of the electrical configuration of the light-receiving unit 400. The light-receiving element 410 is a photodiode in this case. The cathode of the light-receiving element 410 is connected to the high-potential power line, and the anode of the light-receiving element 410 is connected to one end of resistor R3. The other end of resistor R3 is grounded. The input terminal of amplifier AMP1 is commonly connected to the anode of the light-receiving element 410 and one end of resistor R3. Multiple amplifiers AMP2, ..., AMPN are connected in series after amplifier AMP1. The value of N is arbitrary. However, it is desirable that amplifiers AMP1 to AMPN are designed to amplify signals in the wavelength range of a specific wavelength λout. The output terminal of AMPN is connected to one input terminal of differential amplifier 430 (here, the positive input terminal), and the signal SIGN is input. The threshold level Thn is input to the other input terminal of differential amplifier 430 (here, the negative input terminal). The differential amplifier 430 functions as a comparator that outputs a signal corresponding to the difference between the signal SIGN and the threshold level Thn. The differential amplifier 430 outputs a positive potential signal when the signal SIGN is above the threshold level Thn, and a negative potential signal when the signal SIGN is below the threshold level Thn. The control unit 11 detects the presence of the speed measuring device 30 based on this difference between the signal SIGN and the threshold level Thn.

[0309] The control unit 11 may detect the presence of the speed measuring device 30 in the same manner as described above. For example, if the wavelength of the pulsed light is 905 nm, the control unit 11 may perform control to notify the presence of the speed measuring device 30 when pulsed light with a pulse interval of 80 ms (or including a range of less than 80 ms and / or more than 80 ms, which is within a certain range from the reference pulse interval) is received. Alternatively, the control unit 11 may perform control to notify the presence of the speed measuring device 30 when pulsed light with a pulse width (emission time) of 20 ms (or including a range of less than 20 ms and / or more than 20 ms, which is within a certain range from the reference pulse width) is received. The control unit 11 may also notify the presence of the speed measuring device 30 when pulsed light of a specific wavelength λout is received at least once. In this way, if there is a possibility that a speed measuring device 30 is present, its presence can be quickly notified and made known to the user.

[0310] [13. Variations of [12. Other Embodiments]] (13-1) As shown in Figure 81, the electronic device 10A may have a reflector 500. The reflector 500 is located at a position different from the optical path from the focusing lens 300 to the photodetector 410. The reflector 500 includes a reflective surface that reflects at least a portion of the light emitted from the focusing lens 300 toward the photodetector 410. The reflector 500 has a portion that surrounds the optical path and is preferably formed in a cylindrical shape that surrounds the optical path all around to increase the reflectivity. The diameter of the reflector 500 decreases as it approaches the photodetector 410. In this way, the amount of light received by the photodetector 410 from the speed measuring device 30 increases, so that the presence of the speed measuring device 30 can be indicated more reliably.

[0311] For example, the reflective section 500 may be arranged by bending a specular reflective sheet vertically into a semi-circular shape on the substrate side with the light-receiving element 410 facing inward. For example, the section from the incident part to the light-receiving element 410 may be made into a cylinder, with the inside of the cylinder being the mirror surface (or scattering surface).

[0312] (13-2) As shown in Figure 82, the electronic device 10A may have a reflector 600. The reflector 600 is provided on the optical path from the condensing lens 300 to the photodetector 410. The reflector 600 uses total internal reflection to reflect at least a portion of the light emitted from the emission surface 320 toward the photodetector 410. The reflector 600 is, for example, a columnar, rectangular prism, cone, or pyramidal medium provided between the condensing lens 300 and the photodetector 410, and may be a material that has the function of reflecting light, such as infrared-transmitting resin, glass, or optical fiber. The reflector 600 can be made of a material that transmits light of a specific wavelength. The reflector 600 may be realized using total internal reflection above the critical angle. For total internal reflection at the critical angle, the shape of the side of the reflector 500 may be flat, but it may also be made into a non-flat shape such as jagged. It is also conceivable to direct the light that is going out from the condensing lens 300 toward the inside. In this way, the amount of light received by the light-receiving element 410 from the speed measuring device 30 increases, making it possible to more reliably signal the presence of the speed measuring device 30.

[0313] (13-3) The vertical center position of the condensing lens 300 may be shifted upward from the light-receiving element 410. This is to ensure that light is properly incident on the light-receiving element 410 even when the main unit is tilted so that the upper part of the screen is in the back, in order to make the screen easier to see.

[0314] This configuration relates to the "widening of the upper field of view" described in Figure 79. In short, sensitivity to pulsed light is higher from above than from below in the vertical direction. When such a configuration is adopted in the electronic device 10A, if the display unit 13 (main screen) is installed at an upward angle so that it is easily visible from the driver's vehicle, the sensitive upper part (i.e., the part above the center in the vertical direction) becomes closer to horizontal, making it easier to receive pulsed light Lout.

[0315] (13-4) As shown in Figure 83, a collision warning system 700 may be provided that emits light toward the windshield 42 of the vehicle. The collision warning system 700 is positioned, for example, on or around the windshield 42. The collision warning system 700 emits light L1 of a predetermined wavelength toward the front of the vehicle and receives the reflected light to detect the presence of an object in front (for example, another vehicle or a building such as a wall) and the distance to the object, and notifies the user. When the collision warning system 700 is operating, ambient light L2, including reflected waves from the object in front or the windshield, may be received by the electronic device 10A. In this case, depending on the wavelength of the ambient light L2, there is a risk that the light from the collision warning system 700 may be mistaken for pulsed light Lout.

[0316] Figure 84 is a graph showing an example of the temporal change in the level of light received by the light receiving unit 400. In Figure 84, the vehicle is approaching the speed measuring device 30, and the level of pulsed light Lout is gradually increasing. The level of ambient light L2 represents the level of light originating from the collision warning system 700. In this example, if the threshold level Thn is set to Th1, the level of ambient light L2 is below the threshold level Th1, and the level of pulsed light Lout is above it, so there is no problem in detecting pulsed light Lout. However, if the threshold level is set to Th2, both the level of ambient light L2 and the level of pulsed light Lout are above the threshold level Th2. In this case, even if the speed measuring device 30 is to be detected based on the pulse interval, it will not be detected. Ideally, the threshold level Thn should be set optimally, but since the level of light from the collision warning system 700 differs depending on the vehicle type and model, setting it can be difficult. Therefore, the control unit 11 performs control to notify the presence of the speed measuring device 30 when the level of light of a specific wavelength received is above a threshold level, and also performs control to change the threshold level.

[0317] Figure 85 shows an example of the electrical configuration of the light receiving unit 400. In this example, the circuit configuration between the control unit 11 and the differential amplifier 430 differs from the configuration in Figure 80. One end of resistors R41, R42, and R43 are connected to each of the three terminals of the control unit 11. The other ends of resistors R41, R42, and R43 are connected to a power supply line Vcc to which a fixed voltage is applied via resistor R44. The control unit 11 selectively outputs a 1-bit signal indicating either "0" (low level) or "1" (high level) from the three terminals to which resistors R41, R42, and R43 are connected. The threshold level Thi changes according to this signal level. Here, the threshold level Thi is adjusted by a 3-bit signal, so there are 8 possible levels for the threshold level Thi. The level of the threshold level Thi changes according to this signal level. Here, "000" is the minimum, and the threshold levels increase in the order of Th1, Th2, Th8, in the order of "001", "010", ..., "111".

[0318] During a predetermined period, such as while the vehicle is running or while the engine is on, the control unit 11 increases the threshold level sequentially from Th1. In the example shown in Figure 86, the control unit 11 repeatedly receives ambient light L2 at a high frequency, so it determines that ambient light is present. In this case, the control unit 11 raises the threshold level to Th2. However, since the control unit 11 repeatedly receives ambient light L2 at a high frequency, the threshold level Th2 is not optimized. In this case, the control unit 11 determines that ambient light is present and raises the threshold level to Th3. Then, the control unit 11 determines whether it repeatedly receives ambient light L2 at a high frequency. In this case, the control unit 11 does not repeatedly receive ambient light L2 at a high frequency, so it has optimized the threshold level. If the ambient light L2 is repeatedly received at a high frequency even after raising the threshold level to Th3, the control unit 11 raises the threshold level to Th4. The subsequent control is the same.

[0319] When the control unit 11 sets a threshold level, it performs this adjustment at predetermined timings. These timings are, for example, at predetermined intervals. At the adjustment timing, the control unit 11 lowers the set threshold level Thi by one step to Thi-1. Then, when the control unit 11 repeatedly receives ambient light L2 at a high frequency, it raises the threshold level Thi-1 by one step to reset it to threshold level Thi. If ambient light L2 is not repeatedly received at a high frequency, the control unit 11 lowers it by another step to Thi-2. When the control unit 11 repeatedly receives ambient light L2 at a high frequency, it raises the threshold level Thi-2 by one step back to Thi-1 and sets it to this threshold level. If ambient light L2 is not repeatedly received at a high frequency, the control unit 11 lowers the threshold level further to Th-3. Subsequent control is performed similarly. In this way, the threshold level can be optimized at all times. Furthermore, since the circuit contains noise caused by the amplifier's input noise, it is desirable that resistors R41 to R44 be set so that the threshold level Th1 exceeds the level of this noise NS. Also, the threshold levels Th1 to Th8 do not have to be equally spaced; the spacing can be larger as the threshold level increases, or smaller near the lower and upper limits, and larger near the middle. In addition, the number of threshold level steps (number of resistors) is not limited to this, and may be less than 8 steps or more than 8 steps. Furthermore, other configurations are also acceptable for making the threshold level Thi variable.

[0320] Figure 87 shows an example of a modified electrical configuration of the light receiving unit 400. As described above, when the control unit 11 varies the threshold, there is a period at a certain interval during which light is repeatedly received at a high frequency, and during this time, the reception of pulsed light Lout cannot be properly determined. Therefore, as shown in Figure 87, the signal SIGN may be input to one input terminal of the differential amplifier 440 (here, the positive input terminal) and the threshold level Thi+1 may be input to the other input terminal (here, the negative input terminal) of the differential amplifier 430. The method for defining the threshold level Thi+1 may be the same as the method for defining the threshold level Thi. The output terminal of the differential amplifier 440 is connected to the control unit 11. The control unit 11 sets the threshold level so that the level from the differential amplifier 440 is high and the level from the differential amplifier 430 is low, and does not change the threshold level during this time. Then, the control unit 11 raises the threshold level when both are low and lowers the threshold level when both are high. Furthermore, the system is not limited to the collision warning system 700; it can also handle light from other devices and other ambient light sources. Examples of ambient light sources that can be handled include infrared rays from remote controllers, laser light from road surveying equipment, laser light from automatic braking systems of other vehicles, and sunlight. For example, a filter in the light receiving unit suppresses the misidentification of infrared rays from remote controllers and laser light from road surveying equipment as pulsed light from speed measuring devices, and the control unit's functions suppress the misidentification of laser light from automatic braking systems of other vehicles and sunlight as pulsed light from speed measuring devices.

[0321] [14. Other examples of electronic devices] Figure 88 is a diagram showing the external configuration of electronic device 80A, which adopts the configuration described in [12. Other Embodiments] to the electronic device 80 described in Figure 62. Figures 89 and 90 are six-view drawings showing an example of the external configuration of electronic device 80A. Figure 89 shows the front view, top view, right side view, bottom view, and left side view of electronic device 80A. Figure 90 shows the rear view of electronic device 80A. A condensing lens 300 is provided on the rear side of electronic device 80A.

[0322] Figures 91, 92, and 93 show the internal configuration of the electronic device 80A. The difference between the electronic device 80A and the electronic device 80 is that the light-receiving element 843 is formed on the fourth substrate 840 to receive pulsed light. The light-receiving element 843 can have the same configuration as the light-receiving element 410. The light-receiving element 843 is provided on the side of the fourth substrate 840 that faces the side of the condensing lens 300. Therefore, the light-receiving element 843 receives light that has passed through the light-transmitting portion 842 provided on the fourth substrate 840. The light-transmitting portion 842 is a rectangular parallelepiped opening in this case. The filter 870 performs the same function as the filter 250. The shield plate 880 performs the same function as the shield plate 270. The light-receiving element 843 is housed in the shield case 890. The shield case 890 performs the same function as the shield case 280. The same effects as the electronic device 10A can be obtained with such an electronic device 80A.

[0323] [15. Other Embodiments] Regarding configurations that combine lenses or mirrors to widen the light acceptance angle of a photodetector, for example, electronic devices with the following configuration may be provided. Figure 94 is a diagram showing the external configuration of the electronic device 900 of this embodiment. Figure 94(a) is a view of the electronic device 900 from the upper right side of the front side. Figure 94(b) is a view of the electronic device 900 from the upper right side of the rear side. Figure 95 is a six-view diagram showing an example of the external configuration of the electronic device 900. Figure 95 shows a front view, top view, right side view, bottom view, left side view, and rear view of the electronic device 900.

[0324] The electronic device 900 has a rectangular parallelepiped shape, with its width being longer than its height. The electronic device 900 is of a size and weight that allows users to easily carry it. For example, the electronic device 900 has a width (horizontal length) of 48 mm, a height (vertical length) of 34 mm, a depth of 13 mm, and a weight of 16 g. The housing 900A of the electronic device 900 is divided into a first housing 901 located on the front side and a second housing 902 located on the rear side. The front side of the first housing 901 is provided with a light-emitting section 911, an operating section 912, and a sound-emitting section 913A.

[0325] The light-emitting unit 911 emits a predetermined light. The light-emitting unit 911 includes, for example, a light-emitting diode. The light-emitting unit 911 emits light according to the operating state of the electronic device 900. The light-emitting unit 911 is located slightly to the lower right of the first housing 901 when viewed from the front. The light-emitting unit 911 emits white light when the electronic device 900 is in standby mode. The light-emitting unit 911 emits blue light when the electronic device 900 is being operated. The light-emitting unit 911 emits a flashing red light when the electronic device 900 is receiving pulse light Lout. Note that the relationship between the operating state and the light-emitting state is not limited to this, and the light-emitting color and timing (e.g., flashing frequency and number of flashes) can be varied in various ways.

[0326] The control unit 912 accepts user input. The control unit 912 is located slightly to the lower right of the first housing 901 when viewed from the front, and is positioned to the right of the light-emitting unit 911. In this case, the control unit 912 functions as a volume button. The control unit 912 is operated by the user, for example, to adjust the volume of alarm sounds or other sounds, or to mute the alarm sound emitted when the pulse light Lout is received. In this case, the control unit 912 accepts a press operation, but it may also be an operation unit that accepts slide, touch, or other operations.

[0327] The sound-emitting unit 913A emits a predetermined sound. The sound-emitting unit 913A has a plurality of holes located towards the upper right of the first housing 901 when viewed from the front. The sound-emitting unit 913A outputs sound through these multiple holes. The sound-emitting unit 913A outputs alarm sounds and other sounds.

[0328] A DC jack 914 for receiving power input from a power source is provided on the left side of the housing 900A. For example, a cigarette lighter plug cord or a power cable is connected to the DC jack 914. A mounting portion 917 for attaching the first mounting member 940 and the second mounting member 950, which will be described later, is provided on the rear of the second housing 902. Thus, the mounting portion 917 is a mounting portion shared by the first mounting member 940 and the second mounting member 950. The mounting portion 917 is located near the center in the width direction of the second housing 902 when viewed from the rear side, and is located near the lower end of the second housing 902. The mounting portion 917 has a pair of grooves 9171 and 9172. The pair of grooves 9171 and 9172 are provided at a predetermined distance from each other in the width direction of the electronic device 900, and each extends in the vertical direction. The first mounting member 940 and the second mounting member 950, which will be described later, can be attached to and detached from the pair of grooves 9171 and 9172. The first mounting member 940 and the second mounting member 950 may be further fixed to the second housing 902 using fasteners such as screws.

[0329] A lens holder 915 is provided on the rear of the second housing 902. The lens holder 915 forms a window, which is an opening that allows the inside and outside of the housing 900A to pass through. The lens holder 915 may have the same shape as the lens holder 1006 described above, and when viewed from the rear side of the housing 900A, it is an elliptical shape with a major axis in the width direction and a minor axis in the vertical direction. When the electronic device 900 is installed in a vehicle, the width direction corresponds to the width direction of the vehicle, and the vertical direction corresponds to the height direction of the vehicle. The second housing 902 is screwed to the first housing 901 using screws 918 and 919 at both ends in the width direction when viewed from the rear side.

[0330] The focusing lens 920 is fitted into the lens holder 915. The focusing lens 920 is part of the light receiving section 920A in the electronic device 900 and is located at a position corresponding to the light incident section. The focusing lens 920 may have the same configuration as the focusing lens 300. The lens holder 915 and the focusing lens 920 are located on the upper right side of the second housing 902 when viewed from the rear side of the second housing 902. For example, the focusing lens 920 is positioned on the rear side of the housing 900A at least above the center in the vertical direction, and at least to the left of the direction of travel of the vehicle when viewed from the driver's seat side of the vehicle. This is because positioning the focusing lens 920 relatively high on the rear side of the second housing 902 and on the shoulder side where the speed measuring device 30 is likely to be located may make it easier to receive light from the speed measuring device 30. The pulsed light Lout from the speed measuring device 30 is introduced into the housing 900A via the lens holder 915 and the focusing lens 920.

[0331] Figure 96 shows the electronic device 900 with the second housing 902 removed. Figure 97 shows the electronic device 900 with the condensing lens 300 further removed. Figure 98 shows the electronic device 900 with the first housing 901 removed.

[0332] A circuit board 930 is provided inside the housing 900A. The circuit board 930 is a roughly rectangular shape, longer in the width direction than in the vertical direction, and is almost identical in shape and dimensions to the front of the first housing 901 and the back of the second housing 902. On the circuit board 930, a light-receiving section 920A (condensing lens 920) is provided at a position slightly to the upper right when viewed from the back side. The condensing lens 920 is designed and manufactured to concentrate pulsed light Lout at a predetermined focal length position. The light-receiving element 931 receives the light concentrated by the condensing lens 920. The electronic device 900 has a light-receiving element 931 as one of its light-receiving elements. The light-receiving element 931 may have the same configuration as the light-receiving element 410. The light-receiving element 931 is provided on the side of the circuit board 930 opposite to the side where the condensing lens 920 is located, which in this embodiment is the front side of the electronic device 900. Therefore, the light-receiving element 931 receives light that has passed through the light-transmitting portion 932 provided in the substrate 930. In this case, the light-transmitting portion 932 is a rectangular parallelepiped-shaped opening.

[0333] Filter 933 may have the same configuration as filter 250 and is an example of a wavelength selector corresponding to the first wavelength selector 121. Filter 933 is provided between the light-receiving element 931 and the focusing lens 920 and selectively transmits light of a specific wavelength λout from the incident light. Filter 933 may be removed in any configuration. Shielding plate 934 is a shield made of, for example, aluminum or a conductive material and is provided in the region surrounding three of the four sides of the light-transmitting section 932. Shielding plate 934 is intended to suppress the effects of static electricity on the light-receiving element 931 and other electronic components. The light-receiving element 931 is housed in shielding case 935. Shielding case 935 is provided on the side of the substrate 930 opposite to the side where the focusing lens 920 is located, in this embodiment on the front side of the electronic device 900, and covers the entire light-receiving element 931. Such shielding case 936 performs the same function as shielding case 280.

[0334] In this manner, the light-receiving element 931 is positioned on the front surface of the substrate 930 of the electronic device 900. This arrangement allows for more reliable shielding in a simple manner, and because the substrate 930 is located between the light-receiving element 931 and the condensing lens 920, the space corresponding to the focal length can be effectively utilized. As a result, this also contributes to making the electronic device 900 as a whole more compact.

[0335] The speaker 913 constitutes part of the sound emission unit 913A and outputs sound. The speaker 913, the operation unit 912, the DC jack 914, and the light receiving unit 920A (light receiving element 921) are electrically connected to the control unit 916. The control unit 916 controls each part of the electronic device 90 and is, for example, a computer including an arithmetic processing circuit and memory. The control unit 916 may be provided on the side of the circuit board 930 where the condensing lens 920 is located, or on the opposite side. The control unit 916 may provide notification in response to the reception of pulse light Lout in the same manner as the control unit 11 described in [12. Other Embodiments] above. Also, when the control unit 11 receives pulse light Lout, it may make the light-emitting unit 911 emit red light or emit an alarm sound using the speaker 913. The control unit 916 controls the output of the alarm sound according to the result of volume adjustment in response to the operation of the operation unit 912. The control unit 916 may perform the same control as in the other embodiments described above, except for the control of the display unit.

[0336] The electronic device 900 configured as described above is mounted to the vehicle using the first mounting member 940 and the second mounting member 950 selectively. The first mounting member 940 is a member for mounting the electronic device 900 to the dashboard and is also called a dashboard mounting bracket. The second mounting member 950 is also called a suspended mounting stay.

[0337] Figure 99 shows the electronic device 900 mounted on the dashboard using the first mounting member 940. Figure 99(a) is a view of the electronic device 900 from the upper right of the front side. Figure 99(b) is a view of the electronic device 900 from the upper right of the rear side. Figure 100 shows the external configuration of the first mounting member 940. Figure 101 is a diagram illustrating the method of mounting the electronic device 900 using the first mounting member 940.

[0338] The first mounting member 940 includes a base portion 941, a socket portion 942, a ball stud 943, and a mounting portion 944. The base portion 941 is the part that is attached to the dashboard of the vehicle. The bottom surface of the base portion 941 is attached to the dashboard using a fixing member such as an adhesive sheet or double-sided tape as described in Japanese Patent No. 5958927 (Figure 101(a)). The base portion 941 includes a socket portion 942 having a space that opens to the front. The ball portion of the ball stud 943 is mounted on the socket portion 942. The socket portion 942 and the ball stud 943 mounted on the socket portion 942 constitute a ball joint mechanism. The ball stud 943 changes its orientation up, down, left, and right when subjected to external force while mounted on the socket portion 942. A mounting portion 944 is provided on the front side of the ball stud 943. The mounting portion 944 is mounted on the mounting portion 917 of the electronic device 900. The mounting portion 944 has a pair of protrusions 9441 and 9442 that protrude to the left and right sides when viewed from the front. Protrusion 9441 protrudes further forward than other parts of the mounting portion 944 and protrudes to the right when viewed from the front. Protrusion 9442 protrudes further forward than other parts of the mounting portion 944 and protrudes to the left when viewed from the front. Protrusion 9441 is inserted into groove 9171, and protrusion 9442 is inserted into groove 9172. When the mounting portion 944 is mounted on the mounting portion 917, it is located between the pair of grooves 9171 and 9172 in the electronic device 900. When the mounting portion 944 is mounted on the mounting portion 917, the protrusions 9441 and 9442 are inserted into grooves 9171 and 9172 respectively, and the mounting portion 944 is moved from bottom to top (Figure 101(b)). After this installation, the base portion 941 is attached to the mounting area (mounting surface) of the dashboard (Figure 101(c)). With the installation completed in this way, the electronic device 900 can receive external forces and change its orientation up, down, left, and right while mounted on the first mounting member 940 (Figure 101(d)). The user can orient the electronic device 900 in the desired direction.

[0339] The mounting portion 944 may be configured to allow the height of the mounted electronic device 900 to be changed. The mounting portion 944 may be, for example, a curved arm-shaped member, and the height of the electronic device 900 may be changed by rotating the mounting orientation by 180 degrees in the vertical direction. For example, the position of the electronic device 900 may be raised and the front of the electronic device 900 may face slightly upward. Other configurations are also possible for allowing the height of the electronic device to be changed. For example, a pair of protrusions 9441 and 9442 may be provided on the mounting portion 944 at positions shifted above or below the center in the vertical direction, so that the electronic device can be attached even when inverted. Such mounting using the first mounting member 940 may be applied to any electronic device described herein. In particular, when applied to an electronic device having a display unit (e.g., display unit 13) on the front (e.g., electronic device 10), the position of the display unit is raised and faces slightly upward from the horizontal direction, making the display unit easier for the user to see.

[0340] Figure 102 shows how the electronic device 900 is suspended and mounted using the second mounting member 950. Figure 102(a) is a view of the electronic device 900 from the upper right of the front side. Figure 102(b) is a view of the electronic device 900 from the upper right of the rear side. Figures 103 to 105 show the external configuration of the second mounting member 950. Figure 106 is a diagram illustrating the method of mounting the electronic device 900 using the second mounting member 950.

[0341] The second mounting member 950 is a plate-shaped member formed from a metal such as aluminum. The second mounting member 950 has a first portion 951, a second portion 952, and a third portion 953. The first portion 951 is a plate-shaped portion. The first portion 951 supports the electronic device 900 by its upper surface contacting the bottom surface of the electronic device 900.

[0342] The second portion 952 is a plate-shaped portion connected to the first portion 951 and substantially perpendicular to the first portion 951. The second portion 952 is shorter in width than the first portion 951. The second portion 952 supports the electronic device 900 by contacting the back surface of the electronic device 900 with one surface of the second portion 952. As a portion that is mounted on the mounting portion 917 of the electronic device 900, the second portion 952 has a pair of protrusions 9521 and 9522 that protrude to the left and right sides when viewed from the front. Protrusion 9521 protrudes further to the front than the other portions of the second portion 952 and protrudes to the right when viewed from the front. Protrusion 9522 protrudes further to the front than the other portions of the second portion 952 and protrudes to the left when viewed from the front. The protrusion 9521 is inserted into the groove 9171, and the protrusion 9522 is inserted into the groove 9172, thereby attaching it to the second portion 952 (Figure 106(c)).

[0343] The second part 952 further has a notch 9523. The notch 9523 is cut out so that it does not overlap with the condensing lens 920 when the second mounting member 950 is attached to the electronic device 900. In this way, the second part 952 is configured not to cover the condensing lens 920 from the back side. The notch 9523 may be cut out in a shape that follows the outer edge of the lens holder 915, for example. This ensures that the contact area between the second part 952 and the electronic device 900 is maintained while preventing the light receiving of the light receiving unit 920A from being obstructed by the second part 952. Of course, the notch 9523 may be cut out in other shapes as long as it does not obstruct this light receiving.

[0344] The third part 953 is a plate-shaped part connected to the second part 952. The third part 953 is attached (e.g., glued) to the mounting part using a fixing member such as double-sided tape, with its upper surface serving as the mounting surface. The third part 953 may be longer in the width direction than the second part 952 and even longer in the width direction than the first part 951. The third part 953 is configured to be bendable along the boundary portion 9531, and can change its orientation relative to the second part 952 in response to external forces. The boundary portion 9531 is the part that forms the boundary between the third part 953 and the second part 952. The boundary portion 9531 has a reduced width dimension to facilitate bending, but a hinge-like member may be provided. The second mounting member 950 is bent in response to external forces and maintains its bent state (shape) even after the external force has been removed.

[0345] When the user installs the device, the orientation of the third part 953 relative to the second part 952 should be adjusted according to the shape of the mounting area in the vehicle, in this embodiment, the inclination of the windshield. For example, the mounting area (attachment location) should be decided in advance, and the angle of the second mounting member 950 should be adjusted by bending it so that the electronic device 900 is as horizontal as possible to the road. As shown in Figures 106(a) and (d), the third part 953 is attached to the mounting area C1, which is the gap area between the ceiling C2 and the windshield C3 (it may also be the area near the upper edge of the windshield C3), using double-sided tape. The gap area may be recognizable to the user as a black border. If the mounting area C1 is, for example, the area behind the rearview mirror, it is desirable that the electronic device 900 is hidden behind the rearview mirror for people inside the vehicle. If the third part 953 is formed to be longer in the width direction, it is easier to secure the adhesive area of ​​the second mounting member 950 to the mounting area C1, and more stable fixing of the electronic device 900 is possible. Mounting part C1 is fixed to the third part 953, for example, using double-sided tape. In this way, when the electronic device 900 is mounted using the second mounting member 950, safety standards are met. Furthermore, since the electronic device 900 receives pulse light Lout from the speed measuring device 30 at a relatively high position, its reception is less likely to be obstructed by obstacles such as vehicles in front. In addition, in certain vehicle models, the area near the upper edge of the vehicle's windshield may be configured to have a higher light transmittance than other parts. For this reason as well, using the second mounting member 950 makes it easier for the electronic device 900 to receive pulse light Lout. Therefore, by mounting using the second mounting member 950, the electronic device 900 can perform control that issues more accurate warnings. Furthermore, with this type of mounting, the electronic device 900 becomes less visible from inside or outside the vehicle, which may be desirable in terms of the aesthetics of the vehicle's interior. Also, the mounting location may be a part other than the windshield, for example, the back of the rearview mirror.

[0346] [16. Other examples of electronic devices] In this embodiment, a configuration in which the electronic device 80A described in [14. Other Examples of Electronic Devices] is mounted by suspension will be described. Figures 107 to 109 show how the electronic device 80A is mounted by suspension using the mounting member 960. Figure 107(a) is a view of the electronic device 80A from the upper right on the rear side of the electronic device 80A. Figure 107(b) is a view of the electronic device 80A from the upper right on the rear side of the electronic device 80A. Figure 108 is a view of the electronic device 80A from below. Figure 109(a) is a view of the electronic device 80A from the upper right on the rear side of the electronic device 80A when the mounting angle is changed. Figure 109(b) is a view of the electronic device 80A from the upper right on the rear side of the electronic device 80A when the mounting angle is changed. Figures 110 to 111 show the external configuration of the mounting member 960. The mounting member 960 includes a portion that can be bent in response to an external force, and even after the external force is removed, it maintains its bent state (shape).

[0347] The mounting member 960 is a plate-shaped member formed from a metal such as aluminum. The mounting member 960 has a first portion 961, a second portion 962, a third portion 963, a fourth portion 964, a fifth portion 965, and a sixth portion 966. The first portion 961 is a plate-shaped portion. The longitudinal direction of the first portion 961 corresponds to the depth direction of the electronic device 80A. The length of the first portion 961 in the longitudinal direction is approximately the same as or longer than the length of the electronic device 80A in the depth direction. The upper surface of the first portion 961 and the electronic device 80A are fixed together using an adhesive member such as double-sided tape, but fasteners or other methods may be used. The sixth portion 966 is connected to one end of the first portion 961. The sixth portion 966 is configured to be bendable along the boundary portion 9661 and can change its orientation relative to the first portion 961 when subjected to external force. The boundary portion 9661 is the boundary between the first portion 961 and the sixth portion 966. The boundary portion 9661 has a reduced widthwise dimension to facilitate bending, but a hinge-like member may be provided.

[0348] In the states shown in Figures 107 and 108, the upper surfaces of the first part 961 and the sixth part 966 are on the same plane. In this case, the electronic device 80A is supported by the upper surfaces of the first part 961 and the sixth part 966 contacting the bottom surface of the electronic device 80A. On the other hand, in the state shown in Figure 109, the sixth part 966 is bent downward by approximately 180 degrees from the state shown in Figures 107 and 108, and is in contact with the bottom surface of the first part 961. In this case, the electronic device 80A is supported by the upper surface of the first part 961 contacting the bottom surface of the electronic device 80A. The reason why the device can take on these two states will be explained later.

[0349] The second part 962 is a plate-shaped part connected to the first part 961 and approximately perpendicular to the first part 961. The height of the second part 962 is approximately the same as, or longer than, the height of the electronic device 80A. The second part 962 may support the electronic device 80A by one side contacting the front of the electronic device 80A. The third part 963 is a plate-shaped part connected to the second part 962 and approximately perpendicular to the second part 962. The third part 963 has a surface approximately parallel to the first part 961, but its length (corresponding to the depth of the electronic device 80A) is shorter than the depth of the first part 961. The width (short side) of the second part 962 and the third part 963 are approximately the same. When the electronic device 80A is supported by being sandwiched from three sides by the first part 961 (and further by the sixth part 966), the second part 962, and the third part 963, it is expected that the electronic device 80A will be held more stably.

[0350] The fourth portion 964 is a plate-shaped portion connected to the third portion 963. The fourth portion 964 is configured to be bendable along the boundary portion 9641, and can change its orientation relative to the third portion 963 in response to external forces. The boundary portion 9641 is the portion that forms the boundary between the fourth portion 964 and the third portion 963. The boundary portion 9641 has a reduced widthwise dimension to facilitate bending, but a hinge-like member may be provided.

[0351] The fifth part 965 is a plate-shaped part connected to the fourth part 964. The upper surface of the fifth part 965 is used as a mounting surface and is attached (e.g., glued) to the mounting site using a fixing member such as double-sided tape. The fifth part 965 is configured to be bendable along the boundary portion 9651 and can change its orientation relative to the fourth part 964 when subjected to external force. The boundary portion 9651 is the boundary between the fifth part 965 and the fourth part 964. The boundary portion 9651 has a reduced width to facilitate bending, but a hinge-like member may be provided. The orientation of the fourth part 964 relative to the third part 963 and the orientation of the fifth part 965 relative to the fourth part 964 should be adjusted according to the shape of the mounting site in the vehicle, and in this embodiment, the inclination of the windshield.

[0352] Figure 112 shows a side view of the electronic device 80A mounted on the windshield using the mounting member 960. Figure 112(a) shows the case where the inclination angle of the windshield is 30 degrees with respect to the horizontal, and Figure 112(b) shows the case where the inclination angle of the windshield is 60 degrees with respect to the horizontal.

[0353] In the example shown in Figure 112(a), the upper surface of the sixth part 966 is located on the same plane as the upper surface of the first part 961. The electronic device 80A is positioned on the upper surfaces of the first part 961 and the sixth part 966, and is positioned as close to the windshield as possible. This arrangement allows the electronic device 80A to be positioned closer to the windshield when the slope of the windshield is relatively gentle. Therefore, the electronic device 80A is more likely to receive the pulsed light Lout compared to, for example, the case where the sixth part 966 is not present.

[0354] On the other hand, in the example of Figure 112(b), the sixth part 966 is bent downwards from the first part 961. The electronic device 80A is positioned on the upper surface of the first part 961 and is not in contact with the sixth part 966. In this configuration, when the slope of the windshield is relatively steep, the sixth part 966 retracts downwards from the windshield, allowing the electronic device 80A to be positioned closer to the windshield. Therefore, for example, compared to the case where the sixth part 966 is not bendable, the electronic device 80A is more likely to receive the pulsed light Lout.

[0355] Therefore, by using the mounting member 960, the electronic device 80A can be controlled to issue more accurate alarms regardless of the inclination angle of the mounting area on the vehicle. In addition, using the mounting member 960 has the same effect as using the second mounting member 950. Even if the mounting member 960 is configured without the sixth part 966, the mounting member 960 still provides the function of supporting the electronic device 80A.

[0356] [17. Other Embodiments] A stay (dashboard mounting stay) that can be attached to the mounting portion 917 of the electronic device 900 described in [15. Other Embodiments] to fix the electronic device 900 to the dashboard may be used as a mounting member. As shown in Figure 113, this stay 970 is made of a metal such as aluminum. The stay 970 has a plate-shaped first portion 971 whose lower surface is attached to the dashboard using a fixing member such as an adhesive sheet or double-sided tape (double-sided tape for the main body), a plate-shaped second portion 972 perpendicular to the first portion 971, and a pair of protrusions 973 and 974 that protrude from the second portion 972 on both the left and right sides. The protrusion 973 protrudes further forward than the second portion 972 and protrudes to the right when viewed from the front. The protrusion 974 protrudes further forward than the second portion 972 and protrudes to the left when viewed from the front. The pair of protrusions 973 and 974 can be attached to grooves 9171 and 9172 of the mounting portion 917 of the electronic device 900, respectively. The stay 970 may also be further fixed to the second housing 902 of the electronic device 900 using fasteners such as screws.

[0357] In addition, [15. Other Embodiments], [16: Other Embodiments] and [17: Other Embodiments] describe cases in which electronic devices without a display unit are mounted on the dashboard or suspended in mid-air. However, electronic devices with a display unit may also be mounted on the dashboard or suspended in mid-air.

[0358] Figure 114 shows the six-view drawing of the second mounting member 950 described above, and Figure 115 shows the six-view drawing of the mounting member 960 described above. In Figures 114 and 115, the front view is in the center, with the top view (plan view) above it, the left side view to the left, the right side view to the right, the bottom view below it, and the rear view below the bottom view.

[0359] [18. Variation] (18-1) The focusing lens 300 may be a cylindrical lens or a linear Fresnel lens. In the latter case, the focusing lens 300 will be thinner. Alternatively, two cylindrical lenses may be arranged in a cross pattern to form a point image on the light-receiving element, or linear Fresnel lenses may be arranged in a cross pattern.

[0360] In the configuration of (18-2)(18-1), a filter that extracts and transmits light of a specific wavelength may be placed between the two lenses.

[0361] In the configuration of (18-3)(18-1), the focal position of only one of the lenses may be shifted from the position of the light-receiving element.

[0362] (18-4) As the light-receiving element, an APD (avalanche photodiode), MPPC (multi-pixel-photon-counter), etc. may be used.

[0363] (18-5) Electronic devices may emit an alarm when the spectrum is spectrally separated using a prism or the like and detected by a photodetector at a specific wavelength (for example, 905 nm). Incident light to photodetectors corresponding to other wavelengths may be treated as a source of false alarms.

[0364] (18-6) A light receiving unit may be provided on the front of the electronic device to receive light from the rear. For example, it may be compatible with tracking lasers (lasers from police cars). The electronic device may (a) record rear camera footage for 10 seconds before and 1 minute after rear detection is no longer performed, triggered by the reception of a tracking laser. The electronic device may (b) change the content of the alarm depending on whether the light is received from the front or the rear. The electronic device may (c) receive either the light from the front or the light from the rear at a sensor at the end of an optical fiber.

[0365] (18-7) Electronic devices may emit a predetermined sound (for example, "Gattsoodo!") when they receive a predetermined number of radar waves per second (for example, 21 times).

[0366] (18-8) Electronic devices may recognize the type of speed camera by image recognition of a camera (e.g., an in-vehicle camera 50) and issue a warning about that type. When the user says, "Was that a speed camera?", the device returns "Yes" or "No" based on the image recognition result.

[0367] (18-9) The electronic device may be equipped with optical means (lenses, etc.) that concentrate the half-angle of one incident light to about 3 degrees or less on each side (whereas currently it is about 5 degrees) and receive light from the speed measuring device 30.

[0368] (18-10) A light-receiving element with a sensor area of ​​less than 1 mm may be used to receive laser light from a speed enforcement device. Currently, the sensor area is approximately 1 mm.

[0369] (18-11) Flocked paper may be attached to the portion surrounding the optical path between the optical means (e.g., the condensing lens 300) and the light-receiving element 410 (where the black tape is currently located) or an anti-reflective material may be applied.

[0370] (18-12) An aperture member that narrows the optical path may be provided between the optical means (e.g., the condensing lens 300).

[0371] (18-13) The light-gathering lens 300 may have polished incident and exit surfaces. There may be a difference in the degree of polishing between the incident and exit surfaces. The exit surface should not be polished to a smooth finish.

[0372] (18-14) It is acceptable not to provide a visible light cut material on the outer surface of the housing. It is acceptable to provide a transparent cover material on the outer surface of the housing. It is acceptable to make it possible to see at least a part of the components of the bandpass filter when looking from the outer side of the housing. It is acceptable to make it possible to see at least a part of the components of the photodetector when looking from the outer side of the housing.

[0373] (18-15) The condensing lens 300 should, for example, have a maximum thickness of 3 mm or 4 mm or less. Doing so will improve the transmittance.

[0374] (18-16) The condensing lens 300 may be formed by two-color molding of a visible light-cutting material and a transparent material. For example, the lens may be formed from the transparent material and a visible light-cutting plate may be placed behind the lens. For example, the lens of the other material may be pressed and fixed to the housing with a plate of one material. The condensing lens 300 and the lens holder that holds the condensing lens 300 may be formed integrally and brought into contact with the second substrate 1030 which has a surface perpendicular to the optical axis of the condensing lens 300 and has a light-receiving part 400. The lens holder may be configured such that when a part of the holder is inserted into a hole made in the second substrate 1030 that has a surface for the lens holder, the light-receiving part will be at the optical axis position (when the lens holder is pressed by the second substrate 1030, it will automatically align with the optical axis and tilt will be suppressed).

[0375] (18-17) A hole corresponding to the center of the condensing lens 300 may be made on the lens holder side.

[0376] (18-18) Electronic devices may record the spot-dancing state of the laser beam using an onboard camera. Recording should be done from the start to the end of laser reception.

[0377] (18-19) Electronic equipment should record conditions such as fog using an in-vehicle camera. Recording should be done from the start to the end of pulsed light reception. Infrared light is affected by water droplets, so it is used to identify measurement errors.

[0378] (18-20) It is advisable to perform a process that outputs information from images captured by the in-vehicle camera to determine whether the speed camera (fixed or mobile) was properly installed and measuring speed.

[0379] (18-21) If radar waves are detected for a certain period of time or longer when an electronic device is powered on, a message such as "Is there another radar detector nearby? It is a product that emits severe interference waves. Please move it away." may be displayed.

[0380] [19. Modified examples of electronic devices having multiple light-receiving elements as in the first embodiment, etc.] (19-1) The first wavelength selection unit 121 may be configured to include a band-pass filter in place of the polarizing filter, or in conjunction with the polarizing filter.

[0381] (19-2) The second wavelength selection unit 123 is configured to include a filter in place of the polarizing filter, or in conjunction with the polarizing filter, so that when the pulse light Lout detection level is high and the detection level of other light is low, it is more reliably treated as an alarm target.

[0382] (19-3) Both the first light-receiving element 122 and the second light-receiving element 124 may be used for detecting pulsed light. In this case, both the first wavelength selection unit 121 and the second wavelength selection unit 123 may be filters with characteristics for selecting and receiving light of a specific wavelength.

[0383] (19-4) A cylindrical lens (of a size that maintains the width of the existing housing window) may be provided so as to span the two first photodetectors 122 and the second photodetector 124 (for example, a semicircular lens oriented laterally). The signals from the two first photodetectors 122 and the second photodetector 124 may be further added to the existing level detection unit, such as a light intensity detection balance circuit in which the output voltage becomes zero when the amount of light entering the two photodetectors is equal. The signals from the two photodiodes are detected by a circuit that can detect with high sensitivity when they rise together.

[0384] (19-5) The partition (shield) between the first photodetector 122 and the second photodetector 124 may be removed. This minimizes the need to change the housing structure to shorten the distance between the two photodiodes, or allows for sensitive detection.

[0385] (19-6) Japanese Patent Publication No. 6161429 describes a system in which two laser light sources are incident on and reflected from a polygon mirror, thereby scanning a wide area by scanning the laser irradiation direction horizontally around the polygon mirror. The lasers oscillate at intervals of, for example, 0.25°, and the data obtained from the scanning laser sensor, which is received by four light receiving units, is the distance distribution in a polar coordinate system around the sensor. This data is acquired with a period of 12.5 Hz (80 ms). When a light pattern corresponding to these parameters is detected, a notification is issued indicating that it is a laser speed camera. In particular, it is desirable to identify when a laser from a specific manufacturer is detected and to notify accordingly.

[0386] [20. Other Embodiments] As shown in Figure 118, electronic devices may have "OFF" and "AAC / CUSTOM" settings for radar sensitivity. "OFF" means that no alarm will be issued even if radar is received. Custom allows for detailed settings as follows. Previously, there was no setting to turn off the alarm display and alarm sound, so for example, setting the vehicle speed and alarm level to the minimum will reduce the number of alarms themselves, and as a result, reduce false alarms. The relationship between the mode and the notification control is as shown in Figure 118. The alarm speed setting can be set in 11 stages, for example, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 km / h or more. The alarm level setting can be set in 5 stages, ALL (alarm at all levels), level 2 or higher, level 3 or higher, level 4 or higher, and level 5 only. For example, in urban areas, where there are many sources of false alarms, it is good to not emit an alarm sound below a certain level. Electronic devices may display an alarm without emitting an alarm sound. Furthermore, the electronic device should ideally reduce the volume of its alarm sound if it receives radar waves / laser light for approximately 30 seconds or more. Alternatively, it may emit an alarm sound as shown in Figure 116.

[0387] [21. Other Embodiments] An "undercover police car warning" could be implemented using image recognition. Currently, undercover police cars (for pursuit-type speed enforcement) approach vehicles from behind. While it's not easy to identify such undercover police cars by their appearance alone, they do have several distinguishing features. Therefore, an "undercover police car warning" could be issued using these features along with location information of the enforcement location. For example, an electronic device could issue a warning if its current location information has a predetermined proximity relationship with the location information of a publicly announced enforcement location or enforcement POI, and if it recognizes the above features. The accuracy of the warning could be improved to once every 10 or 5 times, based on features such as the characteristics of the car (e.g., a specific car model), the number of people in the vehicle wearing blue uniforms, the license plate number (starting with a specific number), the number of occupants, whether it's pursuing from behind, and the difference in the car's movement before and after passing.

[0388] [22. Variant] This disclosure is not limited to the embodiments described above, and may be modified as appropriate without departing from the spirit of the invention.

[0389] (Variation 1) The control unit 11 may determine the presence or absence of a speed measuring device based on a digital value corresponding to the amount of light received in the case of an optical system, and an analog value corresponding to the received radio waves in the case of a radar system. This is because the intensity of radio waves may change more smoothly with distance than the intensity of light. In addition, the control unit 11 may determine the presence or absence of reception of pulsed light or microwaves by varying the duration of reception, such as 3 seconds in the case of an optical system and 1 second in the case of a radar system. These durations may be the same.

[0390] (Modification 2) The electronic device 10 may have a dedicated light-emitting unit to notify the presence of an optical speed measuring device when it is detected. In this case, the electronic device 10 will not illuminate this light-emitting unit to notify the presence of the other type of speed measuring device. The electronic device 10 may also choose not to illuminate this light-emitting unit except when it has detected the presence of an optical speed measuring device. Furthermore, the electronic device 10 may illuminate the light-emitting unit with a specific color or pattern when it detects the presence of an optical speed measuring device. This light-emitting unit may be light-emitting unit 23, or it may be a separate light-emitting unit.

[0391] (Variation 3) The first wavelength selector 121 and the second wavelength selector 123 do not necessarily have to be band-pass filters. The first wavelength selector 121 and the second wavelength selector 123 may be composed of, for example, a combination of a low-pass filter and a high-pass filter. Alternatively, the second wavelength selector 123 may be a low-pass filter, as shown in the characteristics of Figure 118(a). In this example, the second wavelength selector 123 transmits light in the wavelength region lower than wavelength λ2a and blocks light in the wavelength region higher than that. The second wavelength selector 123 may also be a high-pass filter, as shown in the characteristics of Figure 118(b). In this example, the second wavelength selector 123 transmits light in the wavelength region higher than wavelength λ2b and blocks light in the wavelength region lower than that. Even in this case, the amount of light received by the second signal Sig2 is extremely small during the period when the pulsed light Lout is being received. The light-receiving unit 12 receives not only the pulsed light Lout that is the target of reception, but also ambient light. However, ambient light generally has a wide wavelength range in which its energy is distributed. Therefore, even when the light-receiving unit 12 receives ambient light that is periodically switched on and off, the amount of light received is expected to be large. For this reason, if the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is small, that is, if the difference is greater than or equal to the threshold, it can be estimated that the pulsed light Lout has been received. On the other hand, if the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is also large, that is, if the difference is less than the threshold, it can be estimated that the possibility of the pulsed light Lout being received is low. Therefore, with the electronic device 10, by receiving light using the first light-receiving element 122 and the second light-receiving element 124, it can be expected that the detection accuracy of the speed measuring device 30 will be improved. Furthermore, the first wavelength selection unit 121 and the second wavelength selection unit 123 may be configured using optical elements other than filters, such as prisms.

[0392] (Modification 4) In the embodiment described above, the light-receiving unit 12 had two light-receiving elements, a first light-receiving element 122 and a second light-receiving element 124, but it can also be configured to have only one. Figure 119 shows the configuration of the electronic device 10 in this modified example. In this example, the light-receiving unit 12 does not have the first light-receiving element 122 and the second light-receiving element 124, but has a light-receiving element 128. The light-receiving element 128 may have the same configuration as the first light-receiving element 122 or the second light-receiving element 124. Furthermore, the electronic device 10 in this modified example has a drive unit 60. The drive unit 60 moves the first wavelength selection unit 121 and the second wavelength selection unit 123 in accordance with the control of the control unit 11. The drive unit 60 has, for example, a motor and gears. During the operation of the electronic device 10, the control unit 11 moves the first wavelength selection unit 121 and the second wavelength selection unit 123 so as to alternately cover the light-receiving surface of the light-receiving element 128. Specifically, as shown in Figure 120(a), the control unit 11 first places the first wavelength selection unit 121 on the light-receiving surface of the light-receiving element 128. The control unit 11 then acquires the signal obtained from the light-receiving element 128 at this time as the first signal Sig1. Next, as shown in Figure 120(b), the control unit 11 first moves the first wavelength selection unit 121 away from the light-receiving surface of the light-receiving element 128 and places the second wavelength selection unit 123 on the light-receiving surface. The control unit 11 then acquires the signal obtained from the light-receiving element 128 at this time as the second signal Sig2. Based on the first signal Sig1 and the second signal Sig2, the control unit 11 detects the speed measuring device 30.

[0393] (Variation 5) In the embodiment described above, the light-receiving unit 12 had two light-receiving elements, a first light-receiving element 122 and a second light-receiving element 124, but it is preferable to have three or more light-receiving elements. Even in this case, the control unit 11 can improve the detection accuracy of the speed measuring device 30 by selecting different wavelength ranges of light for each of the three or more light-receiving elements.

[0394] (Experimental variation 6) In the above description, the light receiving unit 12 had at least one set of wavelength selection unit and light receiving element. Alternatively, the light receiving unit 12 may have a configuration that does not have a wavelength selection unit but has at least one light receiving element. For example, the light receiving unit 12 may receive a third amount of light received when a specific wavelength is selected and received, instead of a second amount of light received which is the amount of light received at a wavelength different from the specific wavelength. In this case, the control unit 11 may perform control to notify the presence of the speed measuring device 30 based on the second amount of light received and the third amount of light received.

[0395] Furthermore, the light receiving unit 12 may receive incident light using a single light receiving element. The control unit 11 may then perform control to notify the presence of the speed measuring device 30 based on the pulse width or pulse interval determined based on the amount of light received by the light receiving unit 12. The method using pulse width or pulse interval may be the same as the modified version of the first embodiment described above. The control unit 11 may also perform control to notify the presence of the speed measuring device 30 if at least one pulse light Lout of waveform is received.

[0396] (Example 7) The light-receiving element may be an image sensor found in a camera such as a dashcam. For example, the control unit 11 acquires images captured by the in-vehicle camera 50 and performs image analysis. It is desirable that the in-vehicle camera is one that does not have an infrared cut filter, in order to prevent pulsed light Lout from being blocked. Then, if the control unit 11 detects a specific pattern of light as a result of the image analysis, it performs control to notify the presence of the speed measuring device 30. The control unit 11 may detect the specific pattern of light based on changes in brightness that indicate that it is light of a specific wavelength. If the control unit 11 detects a specific pattern of light, it may record captured images for a period corresponding to the period of light reception. This period is, for example, one minute before and after the timing when the specific pattern of light was received, but is not limited to this.

[0397] (Variation 8) The electronic device 10 may detect the speed measuring device 30 located behind the vehicle 40. In this case, the light receiving unit 12 should be positioned to receive pulsed light from the vehicle 40.

[0398] (Extreme variation 9) When the electronic device 10 detects the speed measuring device 30, it may upload information such as location information indicating the position of the speed measuring device 30 to the server. The server may be a server that provides social networking services, or a server that manages and distributes update information regarding the notification target.

[0399] The user may be asked in advance, or at each detection or transmission timing, whether or not to allow the electronic device 10 to transmit location information. Obtaining prior consent reduces the burden on the user. The server should store the location information and distribute it to other electronic devices 10. When an electronic device receives location information from the server, it will issue a notification when it approaches the location indicated by that information. The notification should be made in the manner already described, but the control unit 11 may display information that clearly indicates that the notification is based on posted information, such as an icon. Furthermore, notifications based on posted information should be made only within a predetermined period from the detection of the presence of a speed measuring device or the timing of location information transmission, because enforcement is often carried out at set times.

[0400] Furthermore, the system described herein is applicable not only to the detection of speed measuring devices but also to the detection of light-emitting devices that emit light of a specific wavelength.

[0401] (Variation 10) Some of the configurations and operations described in the embodiments described above may be omitted or modified. For example, the electronic device 10 may be compatible with optical systems but not radar systems. Also, for example, the position, shape, and size of each component in the electronic device 10 are merely examples. Furthermore, the light-receiving unit 12 may be provided outside the electronic device 10. For example, the light-receiving unit 12 may be provided in a predetermined location in the vehicle 40, such as inside the license plate, hood, door mirror, or grille. In this case, the control unit 11 may acquire a signal from the light-receiving unit 12 via the communication unit 17.

[0402] (Variation 11) Furthermore, the control unit 11 may determine whether the speed measuring device 30 was present, and if it determines that at least the speed measuring device 30 was present, it may output a signal indicating the determination result to an external device. This external device may also notify that the speed measuring device 30 was present. The present invention can also be specified by a control device (for example, a control module) incorporated into the electronic device 10 that has the same functions as the control unit 11.

[0403] (Example 12) The GPS receiver in the above-described embodiment can be reinterpreted as a GNSS receiver having an antenna that receives signals from the Global Navigation Satellite System (GNSS) and a processing circuit that processes the received signals. Positioning by GNSS is generally commonly referred to as GPS positioning. The position information obtained by the positioning process using this GNSS receiver is information that represents the positioning point of the electronic device 10 in coordinate form, and includes at least latitude and longitude information.

[0404] (Example 13) In electronic devices using the aforementioned lenses (e.g., focusing lenses 300, 950), a lens angle adjustment function may be added. This would allow for compensation of the discrepancy between the laser reception field of view and the direction of vehicle travel. For example, the electronic device may be configured such that a lens device equipped with a lens is mounted on a housing by a mechanism that allows its orientation to be changed vertically and / or horizontally. In this case, the user can adjust the orientation of the lens device to point the lens in the desired direction.

[0405] The scope of the present invention is not limited to the configurations explicitly described in the specification, but also includes combinations of various aspects of the present invention disclosed herein. While the configurations for which patent protection is sought are specified in the appended claims, the present inventors intend to include configurations not currently specified in the claims within the scope of the claims in the future.

[0406] The present invention is not limited to the configurations described in the embodiments above. The components of each embodiment and modification described above may be arbitrarily selected and combined. Furthermore, any component of each embodiment and modification may be arbitrarily combined with any component described in the means for solving the invention or any component that embodies any component described in the means for solving the invention. The present invention intends to obtain rights to these as well through amendments or divisional applications of this application. In addition, even if there is a description such as "in the case of..." or "when...", it is not meant to be a configuration that is limited to that case or time. Configurations that do not fall under these cases or times are also disclosed, and the present invention intends to obtain rights to them as well. Furthermore, even if there is a sequence of descriptions, it is not limited to that order. Configurations with some parts deleted or the order rearranged are also disclosed, and the present invention intends to obtain rights to them as well.

[0407] Furthermore, the applicant intends to obtain rights to the overall design or a partial design by filing an application for amendment to the design application. The drawing depicts the entire device with solid lines, but it is a drawing that includes not only the overall design but also partial designs claimed for parts of the device. For example, it is a drawing that includes not only a partial design for a part of the device, but also a partial design for a part of the device regardless of whether it is a part or not. A part of the device may be a part of the device's components, or a part of a component. The applicant intends to obtain rights not only to the overall design, but also to a partial design in which any part of the solid lines in the drawing is represented by dashed lines. [Explanation of symbols]

[0408] 10:Electronic equipment 10A:Electronic equipment 11: Control Unit 12: Light receiving part 12A: Light receiving part 12B: Light receiving part 12C: Light receiving part 13:Display section 14: Speaker 15: Microwave receiver 16: GPS receiver 17: Communications Department 18: Storage part 19:Operation section 20: Sensor section 21: Mounting part 22: Power supply section 23: Light-emitting part 24: Cable terminal section 30: Speed ​​measuring device 31: Speed ​​measurement section 32: Imaging Unit 33: Strobe 40: Vehicles 41: Dashboard 42: Windshield 43: Rearview mirror 50: In-car camera 60: Drive unit 70: Camera 80:Electronic equipment 80A:Electronic equipment 81: Cable 90: Sensor device 100: Cabinet 100A: Enclosure 101: Window 1 102: Second Window 103: Bulkhead 104: Area 121: First wavelength selector 122: First photodetector 123: Second wavelength selector 124: Second photodetector 125: Interface 126: Visible light cut filter 127: Visible light cut filter 128: Photodetector 171: Wireless module 201: Illuminance sensor 221: Power switch 222: DC Jack 223: Button battery 250: Filter 270: Shield Plate 300: Focusing lens 310:Incidence plane 311: Curved surface 312: Exit surface 313: Flat surface 314A: Legs 314B: Legs 400: Light receiving part 410: Photodetector 430: Differential amplifier 440: Differential amplifier 500:Reflector 600:Reflector 801: First cabinet 802: Second cabinet 803: Lid 810: First board 820: Second board 830: Third board 840: Fourth board 841: Light receiving part 842:Transparent part 843: Photodetector 850: Antenna section 851: Processing circuit 860: GPS receiver 870: Filter 880: Shield Plate 900:Electronic equipment 900A: Chassis 901: First cabinet 902: Second cabinet 911: Light-emitting part 912:Operation unit 913: Speaker 913A: Sound emitting part 914: DC Jack 915: Lens holder 916: Control Unit 917: Mounting part 918: Screw 919: Screw 920: Focusing lens 920A: Light receiving section 921: Photodetector 930: Circuit board 931: Photodetector 932: Translucent part 933: Filter 934: Shield Plate 935: Shield Case 936: Shield Case 940: First mounting member 941: Base 942: Socket part 943: Ball Stud 944: Mounting part 950: Second mounting member 951: Part 1 952:Second part 953: 3rd part 960: Mounting components 961: Part 1 962:Second part 963: 3rd part 964: Part 4 965: Part 5 966: Part 6 970: Stay 971: Part 1 972:Second part 973:Protrusion 974:Protrusion 1001: First cabinet 1002: Second cabinet 1002A: Second enclosure 1003: Lid 1006: Lens holder 1010: First board 1030: Second board 1031: Shield Case 1033:Transparent part 1331: Control circuit

Claims

1. It is an electronic device, Light receiving section, Control unit and Equipped with, The light-receiving unit receives incident light using a single light-receiving element, The control unit is equipped with a function to notify the presence of a speed measuring device if the pulse width or pulse interval falls within a certain range from a reference pulse width or pulse interval, based on a predetermined pulse width or pulse interval and a pulse width or pulse interval determined based on the amount of light received by the light receiving unit. electronic equipment.

2. The control unit is equipped with a function to notify the presence of a speed measuring device when pulse light of at least one waveform is received. The electronic device according to claim 1.

3. The light-receiving unit does not have a wavelength selection unit, but has at least one light-receiving element. The electronic device according to claim 1 or 2.

4. A light-receiving element is the image sensor that a camera has. The electronic device according to any one of claims 1 to 3.

5. The control unit is equipped with a function to acquire images captured by the camera and perform image analysis. The electronic device according to claim 4.

6. A program for a computer to implement the functions of an electronic device described in any one of claims 1 to 5.

Images