Optical transmissive display device, light control method and program

Abstract

According to the present disclosure, an optical transmissive display device is provided, which is provided with: a conductor to which a voltage for changing the transmittance of a light control element and a voltage for outputting electromagnetic waves for communication are applied in a time-division manner; and an optically transparent member on which the conductor is provided and through which light transmitted through the light control element is transmitted. With this configuration, the space occupied by the light control element and the antenna can be reduced in a configuration in which the light control element and the antenna are provided.

Description

Technical Field

[0001] The present disclosure relates to a light-transmitting display device, a dimming method, and a program. Background Art

[0002] The following Patent Document 1 describes a conventional display device such as a head mounted display (HMD) which is mounted on a user's head to be configured to change the transmittance of a display to adjust the amount of external light, thereby providing a clear image for the user to view.

[0003] Reference List

[0004] Patent Literature

[0005] Patent Document 1: JP 5884576 B2 Summary of the invention

[0006] Technical issues

[0007] In some cases, these display devices have a communication function for wireless communication with the outside. In this configuration, each display device includes an antenna for wireless communication. At the same time, when the display device includes an antenna for wireless communication and a dimming element for changing the transmittance, the space occupied by these components is limited, resulting in the problem of degradation of the communication function through the antenna or the function of the dimming element. In addition, when the space occupied by these components increases, it will lead to the problem of reduced effective space for arranging other components.

[0008] Therefore, in a configuration including a dimming element and an antenna, it is necessary to suppress the space occupied by the dimming element and the antenna.

[0009] Solution to the problem

[0010] According to the present disclosure, a light-transmitting display device is provided, which includes: a conductor to which a voltage for changing the transmittance of a dimming element and a voltage for outputting electromagnetic waves for communication are applied in a time-division manner; and a light-transmitting member that is provided with the conductor and transmits light that passes through the dimming element.

[0011] Furthermore, according to the present disclosure, there is provided a dimming method including: causing a conductor to function as a dimming element that changes transmittance during a first period of time; and causing the conductor to function as an antenna for communication during a second period of time.

[0012] Furthermore, according to the present disclosure, there is provided a program causing a computer to function as: a unit causing a conductor to function as a dimming element that changes transmittance during a first period of time; and a unit causing the conductor to function as an antenna for communication during a second period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram showing switching between the electrode wiring of the dimming element and the directional pattern wiring for the antenna by a switch.

[0014] Figure 2 is a schematic diagram showing the dynamic change of the voltage Vin.

[0015] Figure 3 3 is a characteristic diagram showing a time waveform showing the relationship between the voltage Vin to the wiring, the transmittance T, and the ON state of the RF communication.

[0016] Figure 4 Schematic diagram showing a “transmittance table” showing a correspondence table between transmittance and the on time of application of V1.

[0017] Figure 5 is a schematic diagram showing an example of a correction table.

[0018] Figure 6 It is a table showing the correspondence between the detection value of the ambient light sensor and the set value of the transmittance.

[0019] Fig. 7A is a schematic diagram showing an example of an antenna pattern.

[0020] Figure 7B is a schematic diagram showing an example of an antenna pattern.

[0021] Figure 7C is a schematic diagram showing an example of an antenna pattern.

[0022] Fig.7D is a schematic diagram showing an example of an antenna pattern.

[0023] Figure 8 is a schematic diagram showing the configuration of a system according to the present embodiment.

[0024] Fig. 9 It is shown by Figure 8 Flowchart of a process performed by a system. DETAILED DESCRIPTION

[0025] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that in this specification and the drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals and numbers, and repeated description thereof will be omitted.

[0026] Note that the description will be given in the following order.

[0027] 1. Overview

[0028] 2. Switching between the electrode wiring for the dimming element and the directional pattern wiring for the antenna by means of a switch

[0029] 3. Set value and allowable value of transmittance of dimming element

[0030] 4. Correction of manufacturing deviations of dimming components

[0031] 5. Through automatic dimming control

[0032] 6. Antenna pattern examples

[0033] 7. System Configuration Example

[0034] 8. Processing performed in the system

[0035] 9. Adaptation of time periods for dimming and antennas

[0036] 10. Example of dimming element

[0037] 11. Conclusion

[0038] 1. Overview

[0039] In this embodiment, a transmissive display device such as an HMD (also referred to as see-through display glasses, smart glasses, etc.) mounted on the user's head is assumed, and in the transmissive display device, a dimming element is mounted on a combiner (glass portion) and the dimming element has a variable transmittance, so that the transmissive display device can be used as sunglasses. The transmittance adjusted by the dimming element enables the display content to be clearly viewed even under environmental conditions such as direct sunlight.

[0040] At the same time, the display device includes an antenna for external communication that performs external wireless communication, for example, for displaying according to the result of the communication. In this embodiment, the electrode wiring and the antenna pattern of the dimming element are composed of the same conductor, the electrode wiring and the antenna pattern of the dimming element are switched by the switch, and the driving voltage value is dynamically changed in synchronization with the switching.

[0041] 2. Switching between the electrode wiring for the dimming element and the directional pattern wiring for the antenna by means of a switch

[0042] Figure 1 : is a schematic diagram showing a configuration example related to switching between the electrode wiring of the dimming element and the directivity pattern wiring for the antenna by a switch according to the present embodiment. Figure 1The conductor 100 shown in FIG. 1 is used as both an electrode wiring of a dimming element and an antenna. The conductor 100 is connected to a switch 200 via a wiring 110. The conductor 100 is connected to a dimming element power supply 300 or an RF module 400 via a switch 200. When the conductor 100 is connected to the RF module 400, the conductor 100 is connected to the RF module 400 via an impedance matching circuit 500. The reflection caused by the impedance difference is suppressed as much as possible by the impedance matching circuit 500. In addition, the conductor 100 is connected to the RF module 400 to output electromagnetic waves for communication, and thus operates as an antenna.

[0043] The dimming element power supply 300 is driven (DC drive) with a direct current voltage as a first voltage to output an output voltage V1 to the switch 200. At the same time, the RF module 400 is driven (AC drive) with an alternating current voltage as a second voltage to output an output voltage V2 to the switch 200. When the conductor 100 is connected to the dimming element power supply 300 or the RF module 400, the switch 200 is operated to switch the path in a time-division manner. Therefore, the conductor 100 is connected to one of the dimming element power supply 300 and the RF module 400 in a time-division manner. In synchronization with the switching path, the voltage Vin of the wiring 110 is dynamically changed between V1 (DC drive) and V2 (AC drive).

[0044] Note that the dimming element power supply 300 has a wiring impedance of 0Ω and thus provides a fast response. Meanwhile, although the RF module 400 has a wiring impedance of about 50Ω, reflection due to the impedance difference is suppressed as much as possible by the impedance matching circuit 500 .

[0045] Figure 2 1 is a schematic diagram showing the dynamic change of the voltage Vin applied to the conductor 100 via the wiring 110. Figure 2 As shown in FIG. 1 , when the voltage V1 from the dimming element power supply 300 is applied to the conductor 100 , the dynamic change of the voltage V1 alternately switches between off and on. That is, the voltage V1 is applied to the conductor 100 as a rectangular wave.

[0046] In addition, when the voltage V2 from the RF module 400 is applied to the conductor 100, the dynamic change of the voltage V2 shows an AC waveform (alternating current waveform) for RF communication. The voltage V2 is a relatively weak voltage. The voltage V2 is an AC waveform voltage, and thus the conductor 100 can be used as an antenna.

[0047] 3. Set value and allowable value of transmittance of dimming element

[0048] As described above, in the case where the conductor 100 is used as both a dimming element and an antenna, the voltage V1 and the voltage V2 are applied to the conductor 100 in a time-division manner. At this time, if the disconnected state of the driving voltage for the dimming element is maintained for a long time in the portion where the conductor 100 operates as an antenna, the transmittance of the dimming element returns to the maximum value, and the user perceives the change in transmittance. Therefore, the on-time of the dimming element and the on-time of the RF communication are adjusted so that the user is less likely to feel the change in transmittance and the transmittance further drops below the predetermined allowable value. At this time, the transmittance changes over time between the set value and the predetermined allowable value. Note that the allowable value may be an actual measured value obtained by subjective evaluation. The drive of the dimming element is inserted into the RF communication in a time-division manner, and therefore the RF communication is a communication performed at time intervals such as beacons. The set value and the predetermined allowable value may be set by the user, or may be set based on information obtained from various sensors such as an illuminance sensor and a gyro sensor. For example, the user input is set by a touch input to a touch pad mounted on the HMD or by recognizing a user's gesture by an imaging device mounted on the HMD.

[0049] Figure 3 1 is a characteristic diagram showing a time waveform showing the relationship between the voltage Vin applied to the conductor 100 via the wiring 110, the transmittance T of the dimming element and the on time of the RF communication. Figure 3 As shown in , until time t0 the dimming element is off and the transmittance of the dimming element is about 80%. When the first dimming is turned on at time t0, a voltage V1 (DC drive) is applied to the conductor 100. Therefore, the transmittance T decreases to a set value.

[0050] Next, at time t1, application of voltage V1 to conductor 100 is disconnected, and voltage V2 (AC drive) is applied to conductor 100. Thereafter, voltage V1 (DC drive) is applied to conductor 100 at time t2. During the period from time t1 to time t2, application of voltage V1 to conductor 100 is disconnected, and thus transmittance T rises from the set value to the allowable value. Thereafter, voltage V2 (AC drive) is applied to conductor 100 at time t3.

[0051] As described above, when the driving voltage value is 0V for a long time, the transmittance of the dimming element returns to the maximum value, and the user perceives the change in transmittance. Therefore, adjusting the on-time of the dimming element and the on-time of the RF communication makes it less likely that the user will feel the change in transmittance, and further reduces the set value of the transmittance below the allowable value. In addition, the on-time of the dimming element is limited to the first time period, and the on-time of the RF communication is limited to the second time period.

[0052] In addition, a voltage V1 (DC drive) is applied to the conductor 100 at time t4, and a voltage V2 (AC drive) is applied to the conductor 100 at time t5. After time t5, the voltage V1 and the voltage V2 are alternately applied to the conductor 100. During time t0 to time t1, time t2 to time t3, and time t4 to time t5, the dimming element is turned on. At the same time, during time t1 to time t2 and time t3 to time t4, and from time t5, the antenna is turned on. As described above, applying the voltage V1 and the voltage V2 to the conductor 100 in a time-division manner makes it possible to operate the conductor 100 as a dimming element and an antenna.

[0053] According to the characteristics of the dimming element constituted by the conductor 100, the on time for applying the voltage V1 to the conductor 100 varies according to the set value of the transmittance of the dimming element. Figure 4 1 is a schematic diagram showing a “transmittance table” showing correspondence between the transmittance of the dimming element, the dimming on time for applying the voltage V1 to the conductor 100 , and the RF on time for turning on the RF antenna.

[0054] Figure 4 The "transmittance table" shown in defines the relationship between the set value of transmittance [%], the allowable value of transmittance [%], the dimming on time [s] of turning on the dimming element, and the RF on time [s] of turning on the RF antenna. Figure 4 In the example shown in , the permissible value of the transmittance has a value increased by 10% from the set value of the transmittance. Note that the dimming off time to turn off the dimming element corresponds to the RF on time, and the RF off time to turn off the RF antenna corresponds to the dimming on time.

[0055] like Figure 3 As shown in , when the RF antenna is turned on and the application of the voltage V1 to the conductor 100 is disconnected, the transmittance T rises from the set value to the allowable value. At this time, the allowable value of the transmittance is set to increase the set value of the transmittance by 10% or less, and therefore, when the voltage V2 is applied to the conductor 100, the transmittance does not exceed the allowable value, which suppresses the user from perceiving the change in the transmittance.

[0056] In addition, Figure 4 In the example shown in FIG. 1 , the dimming on time for applying the voltage V1 to the conductor 100 is constantly set to five seconds. In addition, the RF on time for applying the voltage V2 to the conductor 100 is determined according to the set value of the transmittance, and Figure 4 In the example of , the RF on time is set to the same value as the set value of the transmittance. Therefore, the length of the time period during which the voltage is applied to the RF antenna varies according to the transmittance. Figure 4 As shown in the transmittance table, the higher the transmittance, the longer the RF on time.

[0057] exist Figure 4 The relationship between the allowable value of transmittance and the RF on time relative to the set value of transmittance can be expressed by the following formula. In the following formula, the set value of transmittance is X [%], the allowable value of transmittance is Yt [%], and the RF on time is Yr [s].

[0058] Yt=X×1.1

[0059] Yr=X

[0060] Notice, Figure 4 The “transmittance table” shown in FIG. 1 is an example, and the relationship between the set value of the transmittance, the allowable value of the transmittance, the dimming on time, and the RF on time is not limited to Figure 4 The example shown in .

[0061] In addition, for example, when it is not necessary to reduce the transmittance of the dimming element (for example, when used in a dark place), the conductor 100 may not be used as a wiring for changing the transmittance of the dimming element, but only as an antenna. In this configuration, the dimming on time is zero. In addition, for example, for use in an airplane mode, etc., the conductor 100 may not be used as an antenna, but as a wiring for applying a voltage to the dimming element. In this configuration, the RF on time is zero. As described above, when the conductor 100 is used as an RF antenna or a dimming element, it is not necessary to switch in a time-division manner by the switch 200.

[0062] 4. Correction of manufacturing deviations of dimming components

[0063] The manufacturing deviation of the conductor 100 used as the wiring for applying the voltage to the dimming element causes the deviation of the driving voltage value for the dimming element relative to the set value of the transmittance. Therefore, a correction table of the driving voltage value relative to the set value of the transmittance is provided according to the manufacturing deviation of the dimming element to correct the deviation based on the correction table.

[0064] Figure 5 is a schematic diagram showing an example of an offset correction table. Figure 5 An example of a table for correcting deviations of the driving voltage value of the dimming element with respect to the set value of the transmittance of 5%, 10%, and 20% is shown. Figure 5 Design targets (design values) of driving voltage values ​​relative to each of set values ​​of transmittance (5%, 10%, and 20%) and actual driving voltage values ​​of each of three dimming elements (IDs: 1 to 3) are shown.

[0065] like Figure 5As shown in , for the dimming element with ID: 1, the design target of the driving voltage value matches the actual driving voltage value. At the same time, for the dimming element with ID: 2, the design target of the driving voltage value relative to the set value of 5% of the transmittance is 1.5V, while the actual driving voltage value is 1.4V. In addition, for the dimming element with ID: 3, the design target of the driving voltage value relative to the set value of 5% of the transmittance is 1.5V, while the actual driving voltage value is 1.7V. Therefore, relative to the driving voltage of 1.5V as the design target, 1.5V is applied to drive the dimming element with ID: 1, 1.4V is applied to drive the dimming element with ID: 2, and 1.7V is applied to drive the dimming element with ID: 3. Therefore, the set value of the transmittance can be set to 5% in any dimming element.

[0066] More specifically, in a display device having a dimming element with ID: 1, the Figure 5 The driving voltage value indicated in the row of ID: 1 in the deviation correction table is stored. Similarly, in a display device having a dimming element of ID: 2, the driving voltage value indicated in the row of ID: 1 in the deviation correction table is obtained during manufacturing. Figure 5 The driving voltage value in the row of ID: 2 in the deviation correction table is obtained in the manufacturing process, and in the display device having the dimming element of ID: 3, the driving voltage value in the row of ID: 2 in the deviation correction table is stored in the deviation correction table, and in the display device having the dimming element of ID: 3, the driving voltage value in the row of ID: 2 in the deviation correction table is obtained in the manufacturing process, Figure 5 The driving voltage value in the row of ID: 3 in the display device is stored in the deviation correction table. Then, in each of the display devices having the dimming elements of ID: 1 to ID: 3, during dimming by the dimming element, the driving voltage value stored in the deviation correction table is applied to the dimming element according to the set value of the transmittance (5%, 10% or 20%).

[0067] As described above, a deviation of the driving voltage value relative to the set value of the transmittance occurs due to the manufacturing deviation of the dimming element. Therefore, for each dimming element, a deviation correction table for correcting the driving voltage value relative to the set value of the transmittance is provided to correct the deviation. The deviation correction table is stored in each display device, and therefore, the set value of the transmittance can be set to a desired value in consideration of the manufacturing deviation of the dimming element.

[0068] 5. Through automatic dimming control

[0069] In this embodiment, an operation mode (automatic dimming mode) of automatically changing the transmittance according to the brightness of the external ambient light can be provided. In this mode, the ambient light sensor included in the display device is used to automatically adjust the set value of the transmittance according to the detection value of the ambient light sensor.

[0070] Figure 6 is a table showing the correspondence between the detection value of the ambient light sensor and the set value of the transmittance. Figure 6As shown in , the larger the detection value of the ambient light sensor, that is, the brighter the external ambient light, the lower the set value of the transmittance. Therefore, when the outside is brighter, the transmittance decreases, and therefore, for example, the display device can be used comfortably even in direct sunlight, and the visibility of the display on the display device can be improved.

[0071] As described above, in the automatic dimming mode in which the transmittance is automatically changed according to the brightness of the ambient light, the ambient light sensor included in the display device may be used to automatically adjust the set value of the transmittance according to the detection value of the ambient light sensor.

[0072] 6. Antenna pattern examples

[0073] FIG. 7A to FIG. 7D is a schematic diagram showing an example of an antenna pattern. FIG. 7A to FIG. 7D Each shows a state where the display device is viewed from the front. Fig. 7A A basic form of an antenna pattern is shown, and an example is shown in which a dimming element is formed on each of two combiners (light transmission members) 10. Each of the two combiners 10 is attached to each of the right eye and the left eye of the user.

[0074] Fig. 7A The basic form shown in FIG. 1 comprises two conductors 100a and 100b and a connector 120 arranged at the midpoint of the upper portion of the combiner 10. Fig. 7A The left side of FIG. 1 shows the conductor 100 a and the conductor 100 b used as wiring for applying a voltage to the dimming element, and the right side shows the conductor 100 a and the conductor 100 b used as an RF antenna.

[0075] In FIG. 7A , when conductors 100a and 100b are used as wiring for applying voltage to a dimming element, one conductor 100a is a positive electrode and the other conductor 100b is a negative electrode. When conductors 100a and 100b are used as RF antennas, conductors 100a and 100b serve as antenna patterns.

[0076] exist Fig. 7A On the right side, L indicates the dipole antenna length and is set to be approximately 0.5 cm to 15 cm. When L is converted to frequency, L is approximately 2 GHz to 60 GHz. Therefore, Fig. 7A The basic antenna pattern shown in is suitable for Bluetooth (registered trademark) (BT), Wi-Fi, millimeter wave communication, etc. Note that for convenience, the relative dielectric constant of the dimming element is set to 1.0. In addition, Fig. 7A In , the directivity of the antenna is horizontal to the ground.

[0077] Figure 7B A first modification of the antenna pattern is shown. The first modification shows Fig. 7A The basic form of the two dimming elements is similarly formed as an example, and an example of a multi-band antenna is shown. Figure 7B , the length L of the left dipole antenna and the length L' of the right dipole antenna are not equal and have a relationship represented by the formula L≠L'. For example, L = 12.5 cm and L' = 5.8 cm. Therefore, the 2.4 GHz band and the 5 GHz band can be used at the same time, and a multi-band antenna can be realized.

[0078] Figure 7C A second modification of the antenna pattern is shown and is shown with Fig. 7A and Figure 7B Compared to the example of changing the directivity of the antenna. Two conductors 100a and 100b are arranged on the horizontal side and the vertical side of the combiner 10. The connector 120 can be arranged at any position on the periphery. For example, when the connector 120 is located at one of the four corners of the combiner 10, a directivity of 45 degrees diagonally to the ground can be provided.

[0079] Fig.7D An example is shown in which the dimming element includes one combiner 10. One combiner 10 is located in front of the right eye and the left eye of the user and covers the right eye and the left eye. The length L of the dipole antenna is about 0.5 cm to 80 cm, and the frequency is about 375 MHz to 60 GHz. Therefore, the present invention can be applied to single-segment mobile digital broadcasting, millimeter wave communication, etc.

[0080] 7. System Configuration Example

[0081] Figure 8 1 is a schematic diagram showing a configuration of a system 1000 of a display device according to the present embodiment. Figure 8 As shown in , system 1000 includes a conductor 100, a switch 200, a dimming element power supply 300, an RF module 400, a CPU 600, an ambient light sensor 700, a transmittance table 800, a light sensor table 810, a deviation correction table 820, a user interface 900 and a display unit 950.

[0082] Ambient light sensor 700 is a reference Figure 6 The sensor for detecting the brightness of the external ambient light described above. As described above, the larger the detection value of the ambient light sensor 700, the lower the set value of the transmittance. The transmittance table 800 corresponds to Figure 4 In addition, the light sensor table 810 corresponds to Figure 6 , and the deviation correction table 820 corresponds to Figure 5 The transmittance table 800, the light sensor table 810, and the deviation correction table 820 are stored in a storage unit, for example, a ROM included in the display device.

[0083] The RF module 400 has a function as a wireless communication unit for external wireless communication. As described above, Bluetooth (registered trademark), Wi-Fi, millimeter wave communication, One-seg mobile digital broadcasting, etc. can be appropriately used as a wireless communication standard. Note that the wireless communication system is not limited to this.

[0084] The user's operation is input to the user interface 900. The user can operate the user interface 900 to perform various operations, such as setting a set value of transmittance.

[0085] The display unit 950 is provided at the combiner 10 and presents information viewed by the user. That is, the display unit 950 functions as a display unit for a see-through glass display provided on the combiner 10. Specifically, the display unit 950 is configured to display information acquired from the outside by the RF module 400.

[0086] The CPU 600 refers to the table values ​​of the transmittance table 800, the light sensor table 810, and the deviation correction table 820 and the user settings, determines a signal indicating a voltage value (driving voltage value) and a power-on / power-off timing of the dimming element, and sends the signal to the dimming element power supply 300. In addition, the CPU 600 determines an on / off timing for the RF module 400, and sends the on / off timing to the RF module 400.

[0087] Furthermore, the CPU 600 transmits a signal indicating the power-on / power-off timing for the dimming element and a signal indicating the on / off timing for the RF module 400 to the switch 200 as an on / off signal for the switch 200 .

[0088] When the transmittance setting value is predetermined by user setting, etc., refer to Figure 4 , and determines the dimming on time and the RF on time according to the set value of the transmittance. Therefore, the CPU 600 is enabled to determine the power on / off timing for the dimming element to send the power on / off timing to the dimming element power supply 300. Similarly, the CPU 600 is enabled to determine the on / off timing for the RF module 400 and send the on / off timing to the RF module 400.

[0089] Note that after the RF module 400 itself is turned off, a process for establishing communication when the power is turned on is required. Therefore, the RF module 400 itself is always turned on, thereby preventing the RF module 400 itself from being turned off. The on time of the RF module 400 corresponds to the time when the radio transmission of the RF module 400 is enabled.

[0090] As described above, the CPU 600 is enabled to refer to the set value of the transmittance Figure 4The transmittance table 800 shown in FIG. 8 determines the power-on / power-off timing for the dimming element and the on / off timing for the RF module 400 .

[0091] In addition, by referring to Figure 5 The CPU 600 is configured to determine the voltage value according to the set value of the transmittance and send the voltage value to the dimming element power supply 300.

[0092] When the set value of transmittance is predetermined by user setting or the like, the permissible value of transmittance, the dimming on time, the RF on time, the voltage value for driving the dimming element, etc. are determined based on the predetermined set value of transmittance.

[0093] In addition, when determining the set value of the transmittance based on the detection value of the ambient light sensor 700, the CPU 600 is enabled to refer to the Figure 6 The table is used to determine the set value of the transmittance according to the detection value of the ambient light sensor 700. Therefore, the allowable value of the transmittance, the dimming on time, the RF on time, the voltage value for driving the dimming element, etc. are determined based on the set value of the transmittance according to the detection value of the ambient light sensor 700.

[0094] 8. Processing performed in the system

[0095] Fig. 9 It is shown by Figure 8 Flowchart of processing performed by system 1000. Fig. 9 The processing shown in is basically performed by the CPU 600 and is performed in each time period in which a predetermined control is performed. First, in step S10, the driving voltage value for the dimming element is corrected with reference to the deviation correction table 820, and the driving voltage value is determined. In the next step S12, it is determined whether the automatic dimming mode is turned on, and if the automatic dimming mode is turned on, the process proceeds to step S14.

[0096] In step S14, the detection value of the ambient light sensor 700 is read. In the next step S16, the light sensor table 810 is referenced, and the set value of the transmittance is determined according to the detection value of the ambient light sensor 700. In the next step S18, the transmittance table 800 is referenced and the on / off time of the dimming element and the on / off time of the RF module 400 are set. After step S18, the process ends.

[0097] Furthermore, if the automatic dimming mode is off in step S12, the process proceeds to step S20. In step S20, it is determined whether the dimming element is in the first on state, and if the dimming element is in the first on state, the process proceeds to step S22. In step S22, the set value of the transmittance is read. Here, the operation mode is not the automatic dimming mode, and therefore the set value of the transmittance set by the user setting or the like is read.

[0098] In the next step S24, the transmittance table 800 is referred to, and the on / off time of the dimming element and the on / off time of the RF module 400 are set based on the set value of the transmittance. After step S24, the process ends.

[0099] If the dimming element is not in the first on state in step S24, the process ends. In this case, the on / off time of the dimming element and the on / off time of the RF module 400 set in step S24 when the dimming element is in the first on state are applied.

[0100] 9. Adaptation of time periods for dimming and antennas

[0101] Figure 4 The set value of transmittance, the allowable value of transmittance, the relationship between the dimming on time and the RF on time shown in can be changed by user settings. Figure 4 The relationship between the set value of transmittance, the allowable value of transmittance, the dimming on-time, and the RF on-time shown in may be changed according to the type of application of the display device.

[0102] In the case of a change by user setting, the user operates the user interface 900 and thus can change a set value of transmittance, an allowable value of transmittance, a dimming on time, and an RF on time.

[0103] In addition, in the case of making changes according to the type of application of the display device, an RF mode that prioritizes the use of a conductor as an RF antenna, a dimming mode that prioritizes the use of a conductor as a wiring for applying a voltage to a dimming element, etc. may be set. For example, in the case of an application with a large amount of external communication, the RF mode is set to prioritize the function of the RF antenna and suppress the use as a wiring for applying a voltage to the dimming element. In this case, the RF on time is relatively increased and the dimming on time is reduced.

[0104] In addition, in the case of giving priority to the visibility of the display, the function of the dimming element is given priority to make the display clearly viewable. For example, when the visibility of the image to be displayed is enhanced under outdoor use conditions or when an alarm is displayed, the visibility of the display is enhanced. In this case, the dimming on time is relatively increased while the RF on time is reduced. In an emergency, the RF on time can be set to zero to temporarily disconnect the communication. This control that gives priority to the visibility of the display makes it possible to clearly view the display of highly urgent information or the user's information.

[0105] As described above, in the case of changing according to the application, it is assumed that the dimming is changed by giving priority to the function of the RF antenna and the communication function is changed by giving priority to the dimming function. Therefore, the dimming on time and the RF on time can be optimally adjusted, and the time period of the dimming on time and the RF on time can be optimally adjusted.

[0106] 10. Example of dimming element

[0107] For example, as the dimming element, an electrochromic element or a liquid crystal shutter may be used. The electrochromic element switches transmittance by oxidation or reduction reaction according to an applied voltage. The liquid crystal shutter is an optical filter using the characteristics of liquid crystal that changes light transmittance by applying a voltage.

[0108] When the dimming element includes an electrochromic element, the dimming element 14 is formed by holding a flat electrochromic element between two flat transparent electrodes. Oxidation or reduction reaction of the electrochromic element occurs according to voltage applied to transparent electrodes on both sides of the electrochromic element, thereby controlling transmittance.

[0109] 11. Conclusion

[0110] As described above, according to the present embodiment, in the display device in which the dimming element is mounted on the combiner 10, the conductor 100 is configured for both the electrode wiring of the dimming element and the RF antenna and is switched by the switch 200. Then, the driving voltage values ​​for the dimming element and the RF antenna are dynamically changed in synchronization with the switching by the switch 200. Therefore, in addition to the antenna function of the conductor 100, the responsiveness of the dimming element can be improved.

[0111] In addition, when switching the switch 200, the on-time of the dimming element and the on-time of the RF communication are adjusted while the RF antenna is turned on, so that the transmittance does not exceed the pre-set allowable value of the transmittance, and therefore, the user is less likely to feel the change in transmittance during switching.

[0112] In addition, a table for correcting the driving voltage value for each dimming element is provided to correct the deviation of the transmittance due to the manufacturing deviation of the dimming element, and the transmittance is optimally adjusted without being affected by the manufacturing deviation of the dimming element. In addition, in the automatic dimming mode, the ambient light sensor 700 is used to realize automatic adjustment of the transmittance according to the brightness of the ambient light.

[0113] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the technical scope of the present disclosure is not limited to these examples. Those skilled in the art can obviously find various alternatives and modifications within the technical concept described in the claims, and it should be understood that they will naturally fall within the technical scope of the present disclosure.

[0114] In addition, the effects described herein are merely illustrative or exemplary effects, and are not restrictive. That is, together with or in place of the above effects, the technology according to the present disclosure can achieve other effects that are obvious to those skilled in the art based on the description herein.

[0115] Furthermore, the present technology may also be configured as follows.

[0116] (1) A light transmission display device comprising:

[0117] a conductor to which a voltage for changing the transmittance of the dimming element and a voltage for outputting an electromagnetic wave for communication are applied in a time-division manner; and

[0118] A light-transmitting member is provided with the conductor and transmits the light having passed through the dimming element.

[0119] (2) The light-transmitting display device according to (1), wherein the dimming element applies a first voltage to the conductor in a first period of time to change the transmittance of the dimming element.

[0120] (3) The light-transmitting display device according to (2), wherein a second voltage is applied to the conductor in the second period to output electromagnetic waves for communication.

[0121] (4) The light-transmitting display device according to (3), comprising:

[0122] a switch that switches between a first voltage and a second voltage applied to the conductor,

[0123] Wherein, a first voltage is applied to the conductor from the dimming element power supply during a first time period, and a second voltage is applied to the conductor from the RF module during a second time period.

[0124] (5) The light transmissive display device according to (3) or (4), wherein a time interval of the first period or the second period is changed according to a transmittance that is a predetermined transmittance.

[0125] (6) The light-transmitting display device according to any one of (3) to (5), wherein the second period of time is longer as the transmittance is higher.

[0126] (7) The light transmission type display device according to any one of (2) to (6), wherein the transmittance increases from the beginning to the end of the first period with a predetermined allowable value as an upper limit.

[0127] (8) The light-transmitting display device according to any one of (1) to (7), wherein the transmittance is determined according to the brightness of surrounding ambient light, and the transmittance is set lower as the ambient light is brighter.

[0128] (9) The light transmissive display device according to any one of (2) to (7), wherein the first voltage is corrected based on a correction table storing a relationship between the first voltage and transmittance corresponding to manufacturing variations of the dimming element.

[0129] (10) The light-transmitting display device according to any one of (1) to (9), wherein the light-transmitting display device is a head-mounted display, and the light-transmitting member is arranged in front of eyes of a user.

[0130] (11) The light-transmitting display device according to (10), comprising a display unit that provides a display visible to a user.

[0131] (12) The light transmission display device according to any one of (1) to (11), including a mode in which the function as an antenna takes precedence over the function as a dimming element.

[0132] (13) The light transmission display device according to (12), wherein the mode is set according to the amount of communication with the outside via the antenna.

[0133] (14) The light transmission display device according to (11), wherein the conductor includes a mode in which a function of controlling transmittance of a dimming element takes precedence over a function as an antenna, depending on a type of application.

[0134] (15) The light transmission display device according to (14), wherein when the application prioritizes visibility of the display, the conductor prioritizes a function of controlling the transmittance of the dimming element.

[0135] (16) The light-transmitting display device according to any one of (1) to (15), wherein the dimming element includes an electrochromic element.

[0136] (17) The light-transmitting display device according to any one of (1) to (15), wherein the dimming element includes a liquid crystal shutter.

[0137] (18) A dimming method, comprising:

[0138] causing the conductor to function as a dimming element that varies transmittance during a first period of time; and

[0139] The conductor is caused to function as an antenna for communications during a second period of time.

[0140] (19) A program that causes a computer to:

[0141] a unit causing the conductor to function as a dimming element that changes transmittance during a first period of time; and

[0142] The element causes the conductor to function as an antenna for communication during a second period of time.

[0143] Reference numerals list

[0144] 10 Combiner

[0145] 100 Conductor

[0146] 200 Switch

[0147] 300 Dimming Component Power Supply

[0148] 400 RF Module

[0149] 700 Ambient Light Sensor

[0150] 800 Transmittance Table

[0151] 810 Light Sensor Table

[0152] 820 Bias Correction Table

[0153] 900 User Interface

[0154] 950 Display Unit

Claims

1. A light-transmitting display device, comprising: a conductor configured to be applied with a voltage for changing the transmittance of the dimming element and a voltage for outputting an electromagnetic wave for communication in a time-division manner; as well as a light-transmitting member including the conductor, wherein the light-transmitting member is configured to transmit light having passed through the dimming element, wherein The dimming element applies a first voltage to the conductor in a first time period to change the transmittance of the dimming element, and The transmittance increases from the beginning to the end of the first time period with a specific allowable value as an upper limit.

2. The light transmission display device according to claim 1, wherein: A second voltage is applied to the conductor in a second period of time to output the electromagnetic wave for communication.

3. The light-transmitting display device according to claim 2, further comprising: a switch configured to switch the first voltage and the second voltage applied to the conductor, The first voltage is applied to the conductor from a dimming element power supply during the first time period, and the second voltage is applied to the conductor from an RF module during the second time period.

4. The light transmission display device according to claim 2, wherein: A time interval of the first period or the second period is changed according to the transmittance as a specific transmittance.

5. The light transmission display device according to claim 2, wherein: The transmittance is proportional to the length of the second time period.

6. The light transmission display device according to claim 1, wherein: The transmittance is based on the brightness of the ambient light, and the transmittance is inversely proportional to the brightness of the ambient light.

7. The light transmission display device according to claim 1, wherein: The first voltage is corrected based on a correction table, and the correction table stores a relationship between the first voltage and the transmittance based on a manufacturing variation of the dimming element.

8. The light transmission display device according to claim 1, wherein: The light-transmitting display device is a head-mounted display, and the light-transmitting member is located in front of the user's eyes in a wearable state. 9 . The light-transmissive display device according to claim 8 , further comprising a display unit configured to provide a display viewable by the user.

10. The light transmission type display device according to claim 1, further comprising a mode in which a function as an antenna takes priority over a function as the dimming element.

11. The light transmission display device according to claim 10, wherein: The mode is based on the amount of communication with the outside world conducted through the antenna.

12. The light transmission display device according to claim 9, wherein: Depending on the type of application, the conductor may include a mode in which the function of controlling the transmittance of the dimming element takes precedence over the function as an antenna.

13. The light transmission display device according to claim 12, wherein: When the application prioritizes visibility of the display, the conductor is configured to prioritize the function of controlling the transmittance of the dimming element.

14. The light-transmitting display device according to claim 1, wherein: The dimming element includes an electrochromic element.

15. The light transmission display device according to claim 1, wherein: The dimming element includes a liquid crystal shutter.

16. A dimming method, comprising: The control conductor acts as a dimming element to change the transmittance during a first time period; as well as controlling the conductor to function as an antenna for communication during a second time period, wherein: The dimming element applies a first voltage to the conductor during the first time period to change the transmittance of the dimming element, and The transmittance increases from the beginning to the end of the first time period with a specific allowable value as an upper limit.

17. A computer-readable medium comprising computer-executable instructions, which, when executed by a computer, cause the computer to perform operations comprising: The control conductor acts as a dimming element to change the transmittance during a first time period; as well as controlling the conductor to function as an antenna for communication during a second time period, wherein: The dimming element applies a first voltage to the conductor during the first time period to change the transmittance of the dimming element, and The transmittance increases from the beginning to the end of the first time period with a specific allowable value as an upper limit.

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