Optical sensing navigation system and electronic equipment with same
By placing the sensor module inside the filter cover and integrating the emitting light source and sensor chip, the problems of complex structure and large size of the optical finger navigation module are solved, and a more miniaturized, low-cost and highly reliable optical sensing navigation system is achieved.
Patent Information
- Application Number
- CN202423117383.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Existing optical finger navigation modules have a complex structure, many optical components, and a large overall structure, which increases the difficulty and cost of design and testing.
The sensor module is set inside the filter cover, and the emitting light source and sensor chip are integrated in the sensor module. The filter cover protects the sensor module and optimizes the light path, reduces external interference, and simplifies the structure.
It improves the data accuracy and reliability of the sensor module, reduces the module size, reduces the production cost, and supports low-power mode to extend the standby time.
Smart Images
Figure CN223461857U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical sensing navigation technical field, especially optical sensing navigation system and electronic device with it. BACKGROUND
[0002] Optical finger navigation (OFN) is a technology that recognizes human finger actions through optical displacement tracking sensors. It can stably recognize various operations of human fingers, including recognizing moving distance, moving direction and knocking times, etc. OFN module is a common accessory in today's electronic products, and its working principle is as follows: infrared rays are emitted to the finger by the LED (light emitting diode) installed around the sensing area of the sensor chip, part of the infrared rays will be reflected back when meeting the finger, and then the reflected infrared rays are returned to the sensing area through the light shield and the lens, the sensing area quantizes these reflected infrared rays into data, calculates the direction and speed of finger movement, and then outputs in the form of relative coordinates.
[0003] At present, the finger navigation product is mainly realized through the design of tracking non-finger objects and the design of using lenses and other optical devices. The design of tracking non-finger objects refers to the way of simulating finger track by tracking the motion track of a non-finger but finger-operated measured object (such as trackball module). However, the design needs to consider the material, color, size and fixing method of the measured object, which increases the design and test difficulty and cost, and the overall structure of the device is large. The design of using lenses and other optical devices refers to the way of using additional lenses and other optical devices to control the light path and assist the sensor reading (such as the existing OFN module).
[0004] Please refer to Figure 1 , Figure 1 The structure schematic diagram of an OFN module in the related art is schematically shown. As shown in Figure 1 , the OFN module includes a PCB board 11 and an infrared light emitter 12, a light-shield touch panel 13, an optical lens group 14 (including a lens 141 and a prism 142), a light-shield cover 15 and a chip 16 integrated with photosensitive elements (such as photodiode array) and processing / control circuit integrated on the PCB board 11. It can be seen from Figure 1 that the OFN module structure is complex, and the optical lens size and the required multi-layer light path structure need to be designed, the optical devices are more, the overall thickness of the module is basically fixed, and the volume is large. The volume of the processing chip module on the market is also large, and the cost is high. Moreover, the infrared light emitter 12 and the chip 16 are not integrated, and the circuit needs to be designed additionally. INVENTION CONTENTS
[0005] The utility model discloses a purpose at providing a kind of optical sensing navigation system and electronic equipment with it, to solve the structure complex of OFN module, more optical devices and one or more problems of overall structure larger etc.
[0006] To achieve the above object, the utility model discloses a kind of optical sensing navigation system, including sensor module, optical filter cover and circuit board, the sensor module is located in the optical filter cover inside, the sensor module and the optical filter cover are fixedly connected with the circuit board;The sensor module is provided with emitter and sensor chip;The emitter is configured to irradiate the moving object in the upper region of the optical filter cover;The sensor chip is configured to receive the light reflected by the moving object, and the movement state of the moving object is obtained according to reflected light.
[0007] Optionally, the sensor module includes an optical tracking sensor, the optical tracking sensor has opposite first and second surfaces, the emitter and the sensor chip are embedded on the first surface, and the second surface is fixedly connected with the circuit board.
[0008] Optionally, the emitter includes a vertical cavity surface emitting laser or an infrared light emitter, and the emitter is located at the center position of the projection of the optical filter cover on the plane of the emitter.
[0009] Optionally, the wavelength range of the emitter includes 650nm-1000nm.
[0010] Optionally, the inner surface of the optical filter cover is parallel to the first surface and is attached thereto, or the inner surface of the optical filter cover is inclined to the first surface and has a gap.
[0011] Optionally, the outer surface of the optical filter cover is convex outward to form a curved surface.
[0012] Optionally, the material of the optical filter cover includes infrared-transparent acrylic, and the infrared-transparent wavelength range of the optical filter cover includes 650nm-1000nm.
[0013] Optionally, the projection shape of the optical filter cover on the circuit board includes a circle or a rectangle.
[0014] Optionally, the moving object includes a user's finger.
[0015] To achieve the above object, the utility model further provides an electronic device, the electronic device is installed with the optical sensing navigation system of any one of the above.
[0016] Compared with the prior art, the optical sensing navigation system and the electronic device with the same have the following beneficial effects:
[0017] The optical sensing navigation system provided by the utility model, through the sensor module being arranged inside the light filter cover, not only can protect the sensor module from dirt, dust, water source and other pollution from outside, but also can reduce the interference of other light sources from outside on the sensor module, so that the accuracy and reliability of the chip data acquired by the sensor module can be improved.
[0018] Further, the sensor module comprises an optical tracking sensor, the optical tracking sensor has opposite first and second surfaces, the emitting light source and the sensor chip are embedded on the first surface, and the second surface is fixedly connected with the circuit board.
[0019] Since the electronic device provided by the utility model and the optical sensing navigation system of any one of the above belong to the same inventive concept, the electronic device provided by the utility model has at least all the advantages of the optical sensing navigation system provided by the utility model, and the advantages of the electronic device provided by the utility model are described in the description of the advantages of the optical sensing navigation system provided by the utility model, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a structural schematic view of an OFN module provided in the prior art;
[0021] Figure 2 It is a specific example diagram of the optical sensing navigation system provided by the utility model embodiment one;
[0022] Figure 3 It is Figure 2 The position relation between the light filter cover and the sensor module is shown in the schematic view;
[0023] Figure 4 It is a structural schematic view of the sensor module provided by the utility model embodiment one;
[0024] Figure 5 It is another specific example diagram of the optical sensing navigation system provided by the utility model embodiment one;
[0025] Figure 6 It is Figure 5 The position relation between the light filter cover and the sensor module is shown in the schematic view;
[0026] Figure 7 It is still another specific example diagram of the optical sensing navigation system provided by the utility model embodiment one;
[0027] Figure 8 It is Figure 7 The position relation between the light filter cover and the sensor module is shown in the schematic view;
[0028] The following is the description of the reference signs:
[0029] 11-PCB board, 12-infrared light emitter, 13-shading touch panel, 14-optical lens group, 141-lens, 142-prism, 15-shading cover, 16-chip, 21-sensor module, 211-emitting light source, 212-sensor chip, 22-light filter cover, 23-circuit board. DETAILED DESCRIPTION
[0030] The optical sensing navigation system and the electronic device having the same are further described in detail below in combination with the accompanying drawings and specific embodiments. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the accompanying drawings are in a very simplified form and all use non-precise proportions, which are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more apparent and easy to understand, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the conditions of the implementation of the present application. Any modification of structure, change of proportion relationship or adjustment of size, as long as it is the same or similar to the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. The specific design features of the present application disclosed in this paper include, for example, specific dimensions, directions, positions and shapes, which will be determined partly by the specific application and use environment. In addition, in the following description of the embodiments, sometimes the same reference signs are used to represent the same parts or parts with the same function between different drawings, and the repeated description is omitted.
[0031] Embodiment one
[0032] The present embodiment provides an optical sensing navigation system. Specifically, please refer to Figures 2 to 8 , Figure 2 for a specific example of the optical sensing navigation system provided by the present embodiment; Figure 3 for Figure 2 the position relationship between the light filter cover and the sensor module is shown in the schematic view; Figure 4 for the structure of the sensor module provided by the present embodiment; Figure 5 for another specific example of the optical sensing navigation system provided by the present embodiment;
[0033] Figure 6 for Figure 5 the position relationship between the light filter cover and the sensor module is shown in the schematic view; Figure 7 for another specific example of the optical sensing navigation system provided by the present embodiment; Figure 8 for Figure 7 the position relationship between the light filter cover and the sensor module is shown in the schematic view. From Figures 2 to 8It can be seen that the optical sensing navigation system comprises a sensor module 21, a light filter cover 22 and a circuit board 23, the sensor module 21 is located inside the light filter cover 22, and the sensor module 21 and the light filter cover 22 are fixedly connected with the circuit board 23; the sensor module 21 is provided with a light emitting source 211 and a sensor chip 212; the light emitting source 211 is configured to irradiate a moving object located in an upper region of the light filter cover 22; the sensor chip 212 is configured to receive light reflected by the moving object and obtain a movement state of the moving object according to the reflected light. Thus, the optical sensing navigation system provided by the embodiment can not only protect the sensor module 21 from pollution such as dirt, dust and water from the outside, but also reduce the interference of other light sources from the outside on the sensor module 21, thereby improving the accuracy and reliability of the chip data obtained by the sensor module 21. Further, by integrating the light emitting source 211 and the sensor chip 212 in the sensor module 21, it is not necessary to additionally design a circuit and install various optical devices, so that the structure of the sensor module 21 is simpler, the volume of the sensor module 21 can be reduced, the overall volume of the optical sensing navigation system is smaller, and the manufacturing cost of the optical sensing navigation system is also reduced. The optical sensing navigation system provided by the embodiment can irradiate the moving object located in the upper region of the light filter cover 22 by the light emitting source 211 in the sensor module 21, the light encountering the moving object is reflected back to the sensing area of the sensor chip 212 in the sensor module 21, the sensor chip 212 can receive the light reflected by the moving object, and obtain the movement state of the moving object according to the reflected light.
[0034] It should be noted that, as can be understood by those skilled in the art, the moving object includes but is not limited to a user's finger, a metal product, an acrylic product, a leather product and the like, as long as the moving object can reflect light. Exemplarily, when the moving object is a user's finger, the optical sensing navigation system is an optical finger navigation system, and various operations of the finger can be stably recognized by the optical finger navigation system. In addition, the present application does not make too many limitations on whether the moving object is in contact with the light filter cover 22, as long as the light generated by the light emitting source 211 can be reflected back to the sensing area of the sensor chip 212 through the moving object. Exemplarily, in some exemplary embodiments, the moving object can be in contact with the outer surface of the light filter cover 22; in other embodiments, the moving object can also not be in contact with the outer surface of the light filter cover 22, but maintain a distance of 1-5 mm from the outer surface of the light filter cover 22.
[0035] Exemplarily, in some of the exemplary embodiments, the sensor module 21 is welded on the circuit board 23, and the light filter 22 is fixed on the circuit board 23 by means of dispensing.
[0036] It should be noted that, as can be understood by those skilled in the art, the circuit board 23 includes but is not limited to a flexible printed circuit (FPC).
[0037] Preferably, the sensor module 21 comprises an optical tracking sensor (OTS sensor) having opposite first and second surfaces, the light emitting source 211 and the sensor chip 212 being embedded on the first surface, and the second surface being fixedly connected with the circuit board 23. Thus, by adopting the optical tracking sensor, the optical tracking sensor supports sleep and low power consumption mode switching, has lower power consumption, and can prolong the total standby working time. In addition, the data accuracy, stability and application scene reliability of the optical tracking sensor are all tested, and have reliable data support, and can be stably applied to various application scenes.
[0038] It should be noted that the specific model and manufacturer of the optical tracking sensor are not limited in the utility model.
[0039] Further, the light emitting source 211 comprises a vertical cavity laser emitter or an infrared light emitter, and the light emitting source 211 is located at the center position of the projection of the light filter 22 on the plane where the light emitting source 211 is located. Thus, the light can be uniformly distributed in the light filter 22, so as to improve the utilization rate of light and make the light more uniformly irradiate to the surface of the finger.
[0040] Preferably, the wavelength range of the light emitting source 211 comprises 650nm-1000nm. Thus, the interference of the environmental light source can be further reduced, so as to further improve the accuracy and reliability of the chip data acquired by the sensor module 21.
[0041] Exemplarily, in some of the exemplary embodiments, the light emitting source 211 comprises a vertical cavity laser emitter with a wavelength of 850nm.
[0042] Exemplarily, please continue to refer to Figure 2 As Figure 2As shown in some of the exemplary embodiments, the inner surface of the light filter 22 is arranged in parallel with the first surface and is attached to the first surface. In this way, the light filter 22 can effectively reduce the interference of other light sources on the sensor module 21; by arranging the inner surface of the light filter 22 in parallel with the first surface of the sensor module 21 and attaching the inner surface to the first surface, the light generated in the sensor module 21 can be prevented from being reflected by the inner surface of the light filter 22 to the sensor chip 212, thereby improving the accuracy and reliability of the chip data obtained by the sensor module 21.
[0043] For example, please continue to refer to Figure 5 and Figure 7 As shown in some of the exemplary embodiments, the inner surface of the light filter 22 is arranged in parallel with the first surface and is attached to the first surface. In this way, the light filter 22 can effectively reduce the interference of other light sources on the sensor module 21; by arranging the inner surface of the light filter 22 in parallel with the first surface of the sensor module 21 and attaching the inner surface to the first surface, the light generated in the sensor module 21 can be prevented from being reflected by the inner surface of the light filter 22 to the sensor chip 212, thereby improving the accuracy and reliability of the chip data obtained by the sensor module 21. Figure 5 and Figure 7 As shown in some of the exemplary embodiments, the inner surface of the light filter 22 is arranged in parallel with the first surface and is attached to the first surface. In this way, the light filter 22 can effectively reduce the interference of other light sources on the sensor module 21; by arranging the inner surface of the light filter 22 in parallel with the first surface of the sensor module 21 and attaching the inner surface to the first surface, the light generated in the sensor module 21 can be prevented from being reflected by the inner surface of the light filter 22 to the sensor chip 212, thereby improving the accuracy and reliability of the chip data obtained by the sensor module 21.
[0044] It should be noted that, as can be understood by those skilled in the art, the inclination angle of the inner surface of the light filter 22 and the gap between the inner surface of the light filter 22 and the first surface can be reasonably set according to the actual application scenario.
[0045] In addition, when the inner surface of the light filter 22 is arranged obliquely with the first surface and a gap is left, the outer surface of the light filter 22 can be arranged in parallel with the first surface of the sensor module 21, and the outer surface of the light filter 22 can also be arranged obliquely and consistent with the inclination angle of the inner surface of the light filter 22.
[0046] Preferably, the outer surface of the light filter 22 is convex outward to form a curved surface. In this way, the user experience can be improved.
[0047] Further, the material of the light filter 22 includes infrared transparent acrylic, and the infrared transparent band of the light filter 22 includes 650nm-1000nm. In this way, not only can the interference of the environmental light source be effectively reduced, but also the loss of light can be effectively reduced, and the utilization rate of light can be improved.
[0048] Preferably, the projection shape of the light filter 22 on the circuit board 23 includes a circle or a rectangle. It should be noted that, as can be understood by those skilled in the art, the shape of the light filter 22 can be reasonably set according to the actual application scenario.
[0049] Embodiment two
[0050] The electronic device provided by the embodiment has at least all the advantages of the optical sensing navigation system provided by each of the above embodiments, and the advantages of the electronic device provided by the embodiment are described in the description of the advantages of the optical sensing navigation system provided by each of the above embodiments, which will not be repeated here.
[0051] In summary, the optical sensing navigation system and the electronic device having the same have the following advantages: the optical sensing navigation system comprises a sensor module, a light filter cover and a circuit board, the sensor module is located inside the light filter cover, and the sensor module and the light filter cover are fixedly connected with the circuit board; the sensor module is provided with a light emitting source and a sensor chip; the light emitting source is configured to irradiate a moving object located in an upper region of the light filter cover; the sensor chip is configured to receive light reflected by the moving object and obtain a movement state of the moving object according to the reflected light. Thus, the optical sensing navigation system provided by the embodiment can protect the sensor module from pollution such as dirt, dust and water from the outside, and can reduce the interference of other light sources from the outside on the sensor module, thereby improving the accuracy and reliability of the chip data obtained by the sensor module. Further, by integrating the light emitting source and the sensor chip in the sensor module, it is not necessary to design additional circuits and install various optical devices, so that the structure of the sensor module is simpler, the volume of the sensor module can be reduced, the overall volume of the optical sensing navigation system is smaller, and the manufacturing cost of the optical sensing navigation system is also reduced. The optical sensing navigation system provided by the embodiment can irradiate the moving object located in the upper region of the light filter cover by the light emitting source in the sensor module, and the light reflected by the moving object can be reflected back to the sensing area of the sensor chip in the sensor module. At the same time, the light filter cover protects the sensor module and optimizes the optical path, so that the sensor chip can receive the light reflected by the moving object and obtain the movement state of the moving object according to the reflected light.
[0052] Further, the sensor module comprises an optical tracking sensor, the optical tracking sensor has opposite first and second surfaces, the emitting light source and the sensor chip are embedded on the first surface, and the second surface is fixedly connected with the circuit board. Thus, the optical sensing navigation system provided by the utility model has lower power consumption and can prolong the total standby working time by adopting the optical tracking sensor, which supports sleep and low power consumption mode switching. In addition, the data accuracy, stability and reliability of the optical tracking sensor in various application scenarios are tested, and the data is reliable, so the optical tracking sensor can be stably applied to various application scenarios.
[0053] Since the electronic device provided by the utility model belongs to the same inventive concept as the optical sensing navigation system described in any of the above, the electronic device provided by the utility model has all the advantages of the optical sensing navigation system provided by the utility model. For the advantages of the electronic device provided by the utility model, please refer to the related description of the advantages of the optical sensing navigation system provided by the utility model. Here, no further description is given.
[0054] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the utility model technical solutions.
Claims
1. An optical sensing navigation system, characterized by The optical sensing navigation system comprises a sensor module, a light filter cover and a circuit board, the sensor module is located inside the light filter cover, and the sensor module and the light filter cover are fixedly connected with the circuit board; the sensor module is provided with a light emitting source and a sensor chip; The light emitting source is configured to irradiate a moving object located in an upper region of the light filter cover; The sensor chip is configured to receive reflected light of the moving object and obtain a motion state of the moving object according to the reflected light.
2. An optical sensing navigation system as claimed in claim 1, characterized in that The sensor module comprises an optical tracking sensor, the optical tracking sensor has opposite first and second surfaces, the light emitting source and the sensor chip are embedded on the first surface, and the second surface is fixedly connected with the circuit board.
3. The optical sensing navigation system of claim 1, wherein, The light emitting source comprises a vertical cavity surface emitting laser or an infrared light emitter, and the light emitting source is located at a central position of a projection of the light filter cover on a plane where the light emitting source is located.
4. The optical sensing navigation system of claim 1, wherein, The wavelength range of the light emitting source includes 650nm-1000nm.
5. The optical sensing navigation system of claim 2, wherein, An inner surface of the light filter cover is arranged in parallel with the first surface and is attached thereto; or the inner surface of the light filter cover is arranged in an inclined manner with a gap.
6. The optical sensing navigation system of claim 1, wherein, An outer surface of the light filter cover is convex outward to form a curved surface.
7. The optical sensing navigation system of claim 1, wherein, The material of the light filter cover comprises infrared transparent acrylic, and the infrared transparent wavelength range of the light filter cover includes 650nm-1000nm.
8. The optical sensing navigation system of claim 1, wherein, The projection shape of the light filter cover on the circuit board comprises a circle or a rectangle.
9. The optical sensing navigation system of claim 1, wherein, The moving object comprises a user's finger.
10. An electronic device, comprising: The electronic device is provided with the optical sensing navigation system as claimed in any one of claims 1 to 9.