TWI879252B - Optical sensor and glasses - Google Patents

Abstract

The present disclosure provides an optical sensor including a light source, a light sensing element, and a photoelectric conversion element. The light source is used to emit signal light. The light sensing element is on a side of the light source and is on the signal light path of the signal light for receiving ambient light and transmitting the signal light. A transmittance of the light sensing element changes according to a light intensity of the ambient light, so as to adjust a light intensity of the signal light transmitted from the light sensing element. The photoelectric conversion element is on a side of the optical sensing element away from the light source, and is used to receive the signal light from the optical sensing element and output a voltage modulated signal according to the signal light received. The present disclosure also provides a glasses.

Description

Optical sensor and glasses

The present application relates to a head-mounted device, and more particularly to a light sensor and glasses comprising the light sensor.

Previously, augmented reality (AR) or mediated reality (MR) glasses usually include an ambient light sensor. The ambient light sensor is used to receive ambient light so that the glasses can adjust the screen brightness according to the ambient light. The ambient light sensor is generally a complementary metal oxide semiconductor (CMOS). On the one hand, the frequency response range of CMOS is relatively wide, resulting in the reception of infrared or ultraviolet light in the ambient light, making it difficult to adjust the screen brightness for ambient light of a specific wavelength, and the signal output by CMOS is easily affected by temperature. On the other hand, the signal directly output by CMOS is nonlinear and needs to be converted by circuits before it can correspond to and control the ambient light brightness of a specific wavelength.

The first aspect of the present application provides a photo sensor, comprising: A photo sensor, comprising: A light source, for emitting signal light; A photosensitive component, located on one side of the light source and on the optical path of the signal light, for receiving ambient light and transmitting the signal light, changing its own light transmittance according to the light intensity of the ambient light, thereby adjusting the light intensity of the signal light after being transmitted from one side of the photosensitive component to the other side of the photosensitive component; and A photoelectric conversion component, located on one side of the photosensitive component away from the light source, for receiving the signal light after being transmitted by the photosensitive component, and outputting a voltage-modulated signal according to the received signal light.

Furthermore, the aforementioned light source may be one or more light-emitting components, each of which is used to emit the aforementioned signal light, and the wavelength of the aforementioned signal light is the operating wavelength of the aforementioned photoelectric conversion component.

Furthermore, the signal light is transmitted through the light sensing component and then incident on the photoelectric conversion component as incident light, and the intensity of the voltage modulation signal changes with the intensity of the incident light.

Furthermore, the aforementioned photosensitive component includes a substrate and a photochromic coating formed on the surface of the aforementioned substrate, and the aforementioned substrate is located between the aforementioned light source and the aforementioned photochromic coating; the aforementioned substrate is used to carry the aforementioned photochromic coating, and the aforementioned photochromic coating is used to change its own light transmittance according to the light intensity of the aforementioned ambient light, thereby adjusting the light intensity of the aforementioned signal light after it is transmitted from one side of the aforementioned photosensitive component to the other side of the aforementioned photosensitive component; or The aforementioned photosensitive component includes a photochromic film, and the aforementioned photochromic film is used to change its own light transmittance according to the light intensity of the aforementioned ambient light, thereby adjusting the light intensity of the aforementioned signal light after it is transmitted from one side of the aforementioned photosensitive component to the other side of the aforementioned photosensitive component.

Furthermore, the aforementioned photoelectric conversion component can be a photoresistor.

The second aspect of the present application provides a pair of spectacles, comprising a frame and a lens fixed on the frame; The frame is embedded with any of the aforementioned optical sensors.

Furthermore, the light sensing component includes a first surface facing the light source, a second surface facing the photoelectric conversion component, and two opposite side surfaces between the first surface and the second surface, one of the side surfaces is exposed to the ambient light, and the photoelectric conversion component is isolated from the ambient light.

Furthermore, the lens includes a lens substrate and an electrochromic module disposed on one side of the lens substrate. The electrochromic module is electrically connected to the photoelectric conversion component and is used to change its own transmittance according to the voltage modulation signal output by the photoelectric conversion component.

Furthermore, the electrochromic module includes a first transparent conductive layer, a second transparent conductive layer, and an electrochromic layer disposed between the first transparent conductive layer and the second transparent conductive layer. The voltage modulation signal is applied to the first transparent conductive layer and the second transparent conductive layer to control the transmittance of the electrochromic layer.

Furthermore, the aforementioned glasses also include a switch circuit embedded in the aforementioned frame, the aforementioned switch circuit is electrically connected to the aforementioned photoelectric conversion component and the aforementioned electrochromic module, respectively, and is used to control whether the circuits where the aforementioned photoelectric conversion component and the aforementioned electrochromic module are located are turned on; When the aforementioned switch circuit controls the aforementioned photoelectric conversion component and the aforementioned electrochromic module to be turned on, the aforementioned electrochromic module changes its own transmittance according to the aforementioned voltage modulation signal.

Furthermore, when the aforementioned light sensor is isolated from the aforementioned ambient light, the aforementioned switch circuit switches the working state of the aforementioned glasses, and the aforementioned working state is divided into a first state and a second state; when the aforementioned glasses are in the first state, the transmittance of the aforementioned lens is constant; when the aforementioned glasses are in the second state, the transmittance of the aforementioned lens changes with the changes in the aforementioned ambient light.

When the ambient light of the aforementioned light sensor and glasses changes, the transmittance of the light sensing component changes, causing the light intensity received by the photoelectric conversion component from the light source to change, thereby changing the resistance value of the photoelectric conversion component. When the resistance value of the photoelectric conversion component changes, the amplitude of the output voltage modulation signal changes, that is, the voltage applied to the two ends of the electrochromic module changes, causing the transmittance of the electrochromic module to change, thereby changing the ambient brightness seen by the human eye. Compared with the previous technology, on the one hand, since the photoelectric conversion component is used to sense the signal light emitted by the light source, not directly sense the ambient light, its working wavelength is not affected by the wavelength of the ambient light, but only related to the wavelength of the signal light emitted by the light source, so it can work under ambient light of any wavelength. On the other hand, since the light sensing component can be designed to change its own transmittance for ambient light of a specific wavelength, the light sensor outputs a voltage modulation signal for ambient light of a specific wavelength, so when the light sensor is used in glasses, it also allows the glasses to change the transmittance of the lens for ambient light of a specific wavelength, thereby changing the ambient brightness seen by the human eye and increasing the contrast of the image displayed by the glasses.

As shown in FIG1 , the glasses 1 provided in the embodiment of the present application include: two lenses 10, a light sensor 20 and a frame 40. The frame 40 is provided with two mounting positions, and the two lenses 10 are fixedly mounted in the two mounting positions. The light sensor 20 is embedded in any part of the frame 40. In this embodiment, the light sensor 20 is embedded in the leg of the frame 40.

The glasses 1 of the present application are AR or MR glasses, which can work in a first state and a second state. When the glasses 1 work in the first state, the two lenses 10 can display AR or MR images, and the light sensor 20 is used to convert the ambient light _LC into a voltage modulation signal. The transmittance of the lens 10 changes with the change of the voltage modulation signal, thereby reducing the influence of the brightness of the ambient light _LC on the brightness of the AR or MR image displayed by the glasses 1; when the glasses 1 work in the second state, the transmittance of the two lenses 10 does not change with the ambient light _LC , and is used to transmit or reflect the ambient light _LC .

In this embodiment, the two lenses 10 have basically the same structure and function, and one of the lenses 10 is used as an example for explanation. Please refer to FIG. 2 , the lens 10 includes a transparent lens substrate 11, an electrochromic module 13 disposed on one side of the lens substrate 11, and a display function layer 12 disposed on the side of the electrochromic module 13 away from the lens substrate 11. The lens substrate 11 is disposed on a side close to the ambient light _LC , and the display function layer 12 is disposed on a side close to the eyes.

The lens substrate 11 can be a transparent plane lens, a transparent myopia lens or a transparent hyperopia lens. The transparent plane lens is suitable for users with normal vision, the transparent myopia lens is suitable for users with myopia, and the transparent hyperopia lens is suitable for users with hyperopia. According to different user needs, different transparent lenses can be selected as the lens substrate 11 to improve the user's use effect.

The display function layer 12 is used to display images. The images displayed by the display function layer 12 are superimposed on the real environment, so that the human eye can observe AR or MR images. The display function layer 12 includes a waveguide sheet that can transmit light signals and project the image in the glasses 1 to the display image area.

The electrochromic module 13 includes a first transparent conductive layer 14, a second transparent conductive layer 15, and an electrochromic layer 16 located between the first transparent conductive layer 14 and the second transparent conductive layer 15. The electrochromic layer 16 is electrically connected to the first transparent conductive layer 14 and the second transparent conductive layer 15, respectively.

In this embodiment, the first transparent conductive layer 14 and the second transparent conductive layer 15 can be made of transparent conductive materials such as tin-doped indium oxide (ITO) or aluminum-doped zinc oxide (AZO). These materials have a large bandgap and only absorb ultraviolet light but not visible light.

The electrochromic layer 16 includes an electrochromic material layer 16a, an ion storage layer 16b, and an electrolyte layer 16c disposed between the electrochromic material layer 16a and the ion storage layer 16b. The electrochromic material layer 16a and the ion storage layer 16b can be composed of electrochromic materials. The electrochromic materials can be inorganic electrochromic materials such as tungsten trioxide, or polythiophene and Its derivatives, viologens, tetrathiafulvalene, metal phthalocyanine compounds and other organic electrochromic materials, the electrochromic layer 16a and the ion storage layer 16b can have opposite color changing properties; the material of the electrolyte layer 16c can be a solution or solid material such as lithium perchlorate (LiClO₄), aluminum perchlorate (Al(ClO₄)₃) or zinc chloride (ZnCl₂).

Electrochromism in this article refers to the reversible color change of materials under the action of an electric field. The essence of electrochromism is that electrochromic materials undergo electrochemical oxidation-reduction reactions under the action of an external electric field, and the color of the material changes by gaining and losing electrons.

The electrochromic module 13 is electrically connected to the light sensor 20. When the light sensor 20 converts the received ambient light L _C into a voltage modulation signal, the electrochromic module 13 receives the voltage modulation signal, that is, the voltage applied to the first transparent conductive layer 14 and the second transparent conductive layer 15 changes according to the aforementioned voltage modulation signal, so that the transmittance of the electrochromic layer 16 in the electrochromic module 13 changes with the change of the voltage, thereby reducing the influence of the brightness of the ambient light L _C on the brightness of the image displayed by the display function layer 12. When the brightness of the ambient light _LC is detected to be high, the transmittance of the electrochromic layer 16 decreases, so that the brightness of the ambient light _LC is reduced when it passes through the electrochromic layer 16 and reaches the display function layer 12, thereby reducing the difference between the brightness of the ambient light _LC and the brightness of the image displayed by the display function layer 12, so that the brightness of the ambient light _LC when it passes through the electrochromic layer 16 and reaches the display function layer 12 can be consistent with the brightness of the displayed image; when the brightness of the ambient light _LC is detected to be dark, the transmittance of the electrochromic layer 16 increases, and the brightness of the ambient light LC is reduced. The brightness reduction degree of the ambient light L _C when passing through the electrochromic layer 16 and reaching the display function layer 12 becomes smaller, so that the brightness of the ambient light L _C when passing through the electrochromic layer 16 and reaching the display function layer 12 is not much different from the brightness of the displayed image.

In this embodiment, an electrochromic module 13 is disposed between the display function layer 12 and the lens substrate 11, and the electrochromic module 13 is electrically connected to the light sensor 20, so that the electrochromic module 13 can automatically change the transmittance under different ambient light _LC irradiation, thereby reducing the influence of the brightness of the ambient light _LC on the brightness of the image displayed by the display function layer 12, improving the imaging quality of the glasses in different environments, and further ensuring the user's good visual effect.

When the light sensor 20 senses the change of the ambient light L _C , it converts the ambient light L _C into a voltage modulated signal and outputs it to the electrochromic module 13. The electrochromic module 13 receives the voltage modulated signal, that is, applies a control voltage between the first transparent conductive layer 14 and the second transparent conductive layer 15. The electrochromic material layer 16a undergoes an oxidation-reduction reaction under the action of the control voltage, and the transmittance changes. When the electrochromic material layer 16a undergoes an oxidation-reduction reaction, the ion storage layer 16b plays a role in storing corresponding anti-ions and maintaining the charge balance of the entire system. Among them, when the ion storage layer 16b uses an electrochromic material with a color change performance opposite to that of the electrochromic layer 16a, such as the ion storage layer 16b uses a cathode reduction color change material and the electrochromic layer 16a uses an anode oxidation color change material, it also has the effect of color superposition or complementation.

Please refer to FIG. 3 , the optical sensor 20 includes a light source 21, a light sensing component 22, and a photoelectric conversion component 23. The light source 21 is used to emit signal light _LS ; the light sensing component 22 is located on one side of the light source ₂₁ and on the optical path of the signal light LS, and is used to receive ambient light _LC and transmit signal light _LS , and changes its own light transmittance according to the light intensity of the ambient light _LC , thereby adjusting the light intensity of the signal light _LS after being transmitted from one side of the light sensing component to the other side of the light sensing component; the photoelectric conversion component 23 is located on one side of the light sensing component 22 far from the light source 21, and is used to receive the signal light _LS after being transmitted by the light sensing component 22, and output a voltage modulation signal according to the received signal light _LS .

The light sensing component 22 includes a substrate 22 a and a photochromic coating 22 b, and is located between the light source 21 and the photoelectric conversion component 23 .

The light source 21 may be a light emitting diode (LED) or a vertical-cavity surface-emitting laser (VCSEL), or a light emitting component composed of a plurality of arrays of LEDs or VCSELs; the length range of the light source 21 is 0.1-3 mm, the thickness range is 30-300 mm, and the luminance range is 1-1000 mW.

The photochromic coating 22b in the photosensitive component 22 is composed of a photochromic material. After being irradiated by ambient light L _C of a specific wavelength, the color of the photochromic material changes significantly, thereby changing the transmittance of the photosensitive component 22. Therefore, the photosensitive component 22 can change its own transmittance in response to ambient light L _C of a specific wavelength. The photosensitive component 22 can be composed of a substrate 22a and a photochromic coating 22b, or it can include only one layer of photochromic film. The thickness of the photosensitive component 22 ranges from 0.1 to 3 mm, the length ranges from 0.5 to 5 mm, the width ranges from 0.5 to 5 mm, and the shape is square, rectangular or circular.

The photoelectric conversion component 23 is mainly composed of a photoresistor. The photoelectric conversion component 23 directly receives the signal light _LS but not the ambient light _LC . Therefore, the photoelectric conversion component 23 is related to the wavelength of the signal light emitted by the light source 21, and is not related to the wavelength of the ambient light _LC . Therefore, under any wavelength of ambient light _LC , the photoelectric conversion component 23 can change its own resistance value according to the light intensity of the signal light _LS , thereby changing the size of the output voltage modulation signal. Among them, the material of the photoresistor can be selected from cadmium sulfide (CdS), cadmium selenide (CdSe), gallium arsenide (GaAs) or silicon (Si), with a length range of 0.1~5mm, a thickness range of 0.5~3mm, a bright resistance of 1~300KΩ, and a dark resistance of 0.1~10MΩ.

In this embodiment, the photosensitive component 22 includes a first surface 221 facing the light source 21, a second surface 223 facing the photoelectric conversion component 23, and two opposite side surfaces 225 located between the first surface 221 and the second surface 223. The signal light _LS emitted by the light source 21 is incident from the first surface 221, and is emitted from the second surface 223 through the photosensitive component 22, and is received by the photoelectric conversion component 23. Among them, one opposite side surface 225 is exposed to the ambient light _LC , and the other opposite side surface 225 is isolated from the ambient light _LC . The light source 21 and the photoelectric conversion component 23 are completely buried in the lens frame 40 and isolated from the ambient light _LC .

The signal light L _S is incident on the photoelectric conversion component 23 through the photosensitive component 22. When the ambient light L _C irradiates the photosensitive component 22, the photochromic coating 22b in the photosensitive component 22 absorbs electromagnetic radiation, causing the color of the photochromic coating 22b to change, thereby causing the light transmittance of the photosensitive component 22 to automatically change under the irradiation of the ambient light L C. Therefore, when the ambient light L C irradiates the photosensitive component 22, the photochromic coating 22b in the photosensitive component 22 absorbs electromagnetic radiation, causing the color of the photochromic coating 22b to change, thereby causing the light transmittance of the photosensitive component 22 to automatically change under the irradiation of the ambient light L _C. After the light intensity of _C changes, the intensity of the incident light received by the photoelectric conversion component 23 will change. The resistance value of the photoelectric conversion component 23 changes with the change of the intensity of the incident light. The electrical signal output by the photoelectric conversion component 23 changes with the change of the resistance value of the photoelectric conversion component 23, so that the optical sensor 20 realizes the function of converting the optical signal into an electrical signal.

The glasses 1 further include a switch circuit 30, a power supply 41 and a resistor 42 embedded in the frame 40. In this embodiment, the switch circuit 30, the power supply 41 and the resistor 42 are all embedded in the temple of the frame 40 near the light sensor 20. Please refer to FIG. 4 together. The switch circuit 30 includes a transistor 31, a JK flip-flop 32 and an inverter 33, all of which are located on a printed circuit board (PCB). The switch circuit 30 is used to control the working state of the glasses 1, the power supply 41 provides voltage for the circuit, and the resistor 42 is used to cooperate with the photoelectric conversion component 23 to adjust the voltage received by the inverter 33.

The transistor 31 can be a triode or a field effect transistor. Both the triode and the field effect transistor include three electrodes. The three electrodes of the triode are the base, the collector and the emitter. The three corresponding electrodes of the field effect transistor are the gate, the drain and the source. In this embodiment, the base or the gate of the transistor 31 is called the first electrode 31a, the collector or the drain is called the second electrode 31b, and the emitter or the source is called the third electrode 31c.

The two input terminals of the JK flip-flop 32 are connected to the output terminal of the inverter 33. The output terminal of the JK flip-flop 32 is connected to the first electrode 31a of the transistor 31. The input terminal of the inverter 33 is connected to the first terminal 23a of the photoelectric conversion component 23 in the light sensor 20. The second electrode 31b of the transistor 31 is connected to one terminal of the electrochromic module 13 far away from the photoelectric conversion component 23. The third electrode 31c of the transistor 31 is connected to the first terminal 41a of the power source 41. A switch is connected between them, the first transparent conductive layer 14 in the electrochromic module 13 is connected to the first end 23a of the photoelectric conversion component 23 through a wire, the second transparent conductive layer 15 is connected to the first end 41a of the power source 41 through a wire, the second end 23b of the photoelectric conversion component 23 is connected to the second end 41b of the power source 41 through a wire, and a resistor 42 is connected between the first end 23a of the photoelectric conversion component 23 and the first end 41a of the power source 41 through a wire, thereby forming a complete circuit structure as shown in FIG. 4.

In the switch circuit 30, when the ambient light _LC received by the light sensor 20 is blocked by the hand, the photoelectric conversion component 23 outputs a first voltage signal, the inverter 33 converts the first voltage signal into a second voltage signal, and after the two input ends of the JK flip-flop 32 receive the second voltage signal respectively, the signal at the output end switches between the first voltage signal and the second voltage signal. When the first electrode 31a of the transistor 31 receives the first voltage signal, the transistor 31 is in the on state, establishing the connection between the electrochromic module 13 and the circuit, so that the electrochromic module 13 changes its own transmittance according to the ambient light _LC brightness; when the first electrode 31a of the transistor 31 receives the second voltage signal, the transistor 31 is in the off state, disconnecting the electrochromic module 13 from the circuit, and the transmittance of the electrochromic module 13 remains unchanged.

In the embodiment of the present application, when the ambient light L _C received by the light sensor 20 is blocked by the hand, the switch circuit 30 switches the working state of the glasses 1; when the glasses 1 work in the first state, the electrical connection between the electrochromic module 13 in the lens 10 and the power source 41 is established, and the light sensor 20 receives the ambient light L C _C is converted into a voltage modulated signal, and the photoelectric conversion component 23 transmits the voltage modulated signal to the electrochromic module 13. The transmittance of the electrochromic layer 16 in the electrochromic module 13 changes with the voltage modulated signal, thereby changing the brightness of the AR or MR image displayed by the glasses 1. When the glasses 1 work in the second state, the electrochromic module 13 in the lens 10 is electrically disconnected from the power source 41, the electrochromic layer 16 in the electrochromic module 13 remains transparent, and the lens 10 is used to transmit or reflect the ambient light _LC .

In summary, the embodiment of the present application has the following beneficial effects: When the ambient light _LC changes, the transmittance of the light sensing component 22 changes, causing the light intensity received by the photoelectric conversion component 23 from the light source 21 to change, thereby changing the resistance value of the photoelectric conversion component 23. When the resistance value of the photoelectric conversion component 23 changes, the amplitude of the output voltage modulation signal changes, that is, the voltage applied to the two ends of the electrochromic module 13 changes, causing the transmittance of the electrochromic module 13 to change, thereby reducing the influence of the brightness of the ambient light _LC on the brightness of the image displayed by the display function layer 12. Compared with the prior art, on the one hand, since the photoelectric conversion component 23 is used to sense the signal light _LS emitted by the light source 21, rather than directly sensing the ambient light _LC , its operating wavelength is not affected by the wavelength of the ambient light _LC , but is only related to the wavelength of the signal light _LS emitted by the light source 21, so it can work under ambient light _LC of any wavelength. On the other hand, since the light sensing component 22 is designed to change its own transmittance in response to the ambient light L _C of a specific wavelength, the light sensor 20 outputs a voltage modulation signal in response to the ambient light L _C of a specific wavelength. Therefore, when the light sensor 20 is applied to the glasses 1, the glasses 1 can also change the transmittance of the lens 10 in response to the ambient light L _C of a specific wavelength, thereby reducing the difference between the brightness of the ambient light L _C and the brightness of the image displayed by the display function layer 12.

Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

1: glasses 10: lens 11: lens substrate 12: display function layer 13: electrochromic module 14: first transparent conductive layer 15: second transparent conductive layer 16: electrochromic layer 16a: electrochromic material layer 16b: ion storage layer 16c: electrolyte layer 20: light sensor 21: light source 22: light sensing component 221: first surface 223: second surface 225: opposite side 22a: substrate 22b: photochromic coating 23: photoelectric conversion component 23a: first end of photoelectric conversion component 23b: second end of photoelectric conversion component _LC : ambient light L _S :Signal light 30:Switch circuit 31:Transistor 31a:Transistor first electrode 31b:Transistor second electrode 31c:Transistor third electrode 32:JK flip-flop 33:Inverter 40:Mirror frame 41:Power supply 41a:Power supply first terminal 41b:Power supply second terminal 42:Resistor

FIG1 is a schematic diagram of the three-dimensional structure of the glasses according to an embodiment of the present application.

FIG. 2 is a schematic diagram of the cross-sectional structure of the lens in FIG. 1 along line II-II.

FIG3 is a schematic diagram of the cross-sectional structure of the optical sensor of the embodiment of the present application.

FIG. 4 is a schematic diagram of the circuit structure of the light sensor and the electrochromic module of the embodiment of the present application.

20: Light sensor

21: Light source

22: Light sensing component

221: First surface

223: Second surface

225: Relative side

22a: Base material

22b: Photochromic coating

23: Photoelectric conversion components

L _C : Ambient light

L _S :Signal light

Claims (10)

A light sensor, the improvement of which is that it comprises: a light source for emitting signal light; a light sensing component, located on one side of the light source and on the optical path of the signal light, for receiving ambient light and transmitting the signal light, changing its own light transmittance according to the light intensity of the ambient light, thereby adjusting the light intensity of the signal light after being transmitted from one side of the light sensing component to the other side of the light sensing component; and a photoelectric conversion component, located on one side of the light sensing component away from the light source, for receiving the signal light after being transmitted by the light sensing component, and outputting a voltage-modulated signal according to the received signal light; The aforementioned photosensitive component includes a substrate and a photochromic coating formed on the surface of the aforementioned substrate, and the aforementioned substrate is located between the aforementioned light source and the aforementioned photochromic coating; the aforementioned substrate is used to carry the aforementioned photochromic coating, and the aforementioned photochromic coating is used to change its own light transmittance according to the light intensity of the aforementioned ambient light, thereby adjusting the light intensity of the aforementioned signal light after it is transmitted from one side of the aforementioned photosensitive component to the other side of the aforementioned photosensitive component; or The aforementioned photosensitive component includes a photochromic film, and the aforementioned photochromic film is used to change its own light transmittance according to the light intensity of the aforementioned ambient light, thereby adjusting the light intensity of the aforementioned signal light after it is transmitted from one side of the aforementioned photosensitive component to the other side of the aforementioned photosensitive component. The optical sensor as described in claim 1, wherein the light source may be one or more light-emitting components, each of which is used to emit the signal light, and the wavelength of the signal light is the operating wavelength of the photoelectric conversion component. The optical sensor as described in claim 1, wherein the signal light is transmitted through the optical sensing component and then incident on the photoelectric conversion component as incident light, and the intensity of the voltage-modulated signal changes with the intensity of the incident light. A light sensor as described in claim 1, wherein the aforementioned photoelectric conversion component may be a photoresistor. A pair of spectacles, the improvement of which comprises a frame and a lens fixed on the frame; The frame is embedded with a light sensor as described in any one of claims 1 to 4. The eyeglasses as described in claim 5, wherein the light sensing component includes a first surface facing the light source, a second surface facing the photoresistor, and two opposite side surfaces between the first surface and the second surface, one of the side surfaces is exposed to ambient light, and the photoresistor is isolated from the ambient light. The eyeglasses as described in claim 5, wherein the lens comprises a lens substrate and an electrochromic module disposed on one side of the lens substrate, the electrochromic module being electrically connected to the photoelectric conversion component and configured to change its own transmittance according to the voltage modulation signal output by the photoelectric conversion component. The glasses as described in claim 7, wherein the electrochromic module includes a first transparent conductive layer, a second transparent conductive layer, and an electrochromic layer disposed between the first transparent conductive layer and the second transparent conductive layer, and the voltage modulation signal is applied to the first transparent conductive layer and the second transparent conductive layer to control the transmittance of the electrochromic layer. The glasses as described in claim 7, wherein the glasses further include a switch circuit embedded in the frame, the switch circuit electrically connected to the photoelectric conversion component and the electrochromic module, respectively, for controlling whether the circuits of the photoelectric conversion component and the electrochromic module are turned on; When the switch circuit controls the circuits of the photoelectric conversion component and the electrochromic module to be turned on, the electrochromic module changes its own transmittance according to the voltage modulation signal. The glasses as described in claim 9, wherein when the aforementioned light sensor is isolated from the aforementioned ambient light, the aforementioned switch circuit switches the working state of the aforementioned glasses, and the aforementioned working state is divided into a first state and a second state; when the aforementioned glasses are in the first state, the transmittance of the aforementioned lens is constant; when the aforementioned glasses are in the second state, the transmittance of the aforementioned lens changes with the change of the aforementioned ambient light.

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