WO2019071560A1

WO2019071560A1 - Image sensing unit, image sensor and display device

Info

Publication number: WO2019071560A1
Application number: PCT/CN2017/106011
Authority: WO
Inventors: 李谋涛; 于泽
Original assignee: 深圳芯启航科技有限公司
Priority date: 2017-10-13
Filing date: 2017-10-13
Publication date: 2019-04-18

Abstract

An image sensing unit (100), an image sensor (200) and a display device (1000), comprising a photosensitive element (10), a light-transmitting region (20) and a non-light transmitting region (30), the photosensitive element (10) being disposed in the non-light transmitting region (30); the light-transmitting region (20) at least may transmit visible light and infrared light, the photosensitive element (10) receiving infrared light that is reflected by an object and converting the infrared light into an electric signal; an image sensing unit (100) that comprises the photosensitive element (10), the light-transmitting region (20) and the non-light transmitting region (30) enables the light-transmitting region (20) to transmit transmittable visible light and infrared light, and enables the photosensitive element (10) to receive infrared light that is reflected by an object and convert the infrared light into an electric signal such the image sensing unit (100) has the functions of transmitting visible light and acquiring infrared light, thereby achieving good compatibility between the image sensing unit (100) and a display screen, while biometric images may be acquired when the screen is turned off.

Description

Description: Inventive name: an image sensing unit, an image sensor and a display device

[0001] This solution belongs to the field of image sensing technology, and in particular, to an image sensing unit, an image sensor, and a display device.

Background technique

[0002] With the continuous development of science and technology, biometric image sensing technologies such as fingerprint recognition, facial recognition, vein recognition, and iris recognition are widely used in smart terminals such as mobile phones, check-in machines, door locks, etc., which improves the security of smart terminals. performance.

technical problem

[0003] Existing optical bio-image sensors are generally not compatible with the display screen of the terminal, and although some optical biosensors are compatible with the display screen, the biometric images cannot be efficiently collected after the screen is turned off. Problem solution

Technical solution

[0004] A first aspect of the embodiments of the present disclosure provides an image sensing unit including a photosensitive element, a light transmitting region, and an opaque region, wherein the photosensitive element is disposed in the opaque region;

[0005] The light transmissive area is at least permeable to visible light and infrared light, and the photosensitive element receives infrared light reflected by the object and converts it into an electrical signal.

In one embodiment, the photosensitive element comprises any one of a photodiode, a photoresistor, a charge coupled device, or a complementary metal oxide semiconductor.

[0007] A second aspect of the embodiments of the present disclosure provides an image sensor including a light transmissive substrate and a plurality of the image sensing units, wherein the plurality of image sensing units are arranged in an array on the substrate s surface.

In one embodiment, the substrate is a glass substrate or a plastic-based flexible substrate.

[0009] In one embodiment, the photosensitive element is electrically connected to an external signal processing module, and the infrared light emitting module is electrically connected to the external light emitting driving module;

[0010] The illumination driving module controls the infrared light emitting module to emit infrared light, the photosensitive element receives infrared light reflected by an object and converts into an electrical signal, and the signal processing module processes the electrical signal To the digital signal.

[0011] In one embodiment, the image sensor further includes a plurality of electronic switching units equal in number to the plurality of image sensing units, each of the photosensitive elements and one of the electronic switching units being one by one Corresponding to an electrical connection, the electronically-off unit is connected between the photosensitive element and the signal processing module;

[0012] The electronic switching unit accesses a control signal, and controls a corresponding photosensitive element and the signal processing module to be electrically connected or disconnected according to the control signal.

[0013] In one embodiment, the signal processing module includes a signal amplifying unit and a data processing unit, and the signal amplifying unit is electrically connected to the photosensitive element and the data processing unit;

And [0014] the signal amplifying unit amplifies the electrical signal, and the data processing unit processes the amplified electrical signal into a digital signal.

[0015] In an embodiment, the signal processing module further includes a filtering unit, and the filtering unit is electrically connected to the signal amplifying unit and the data processing unit;

[0016] The filtering unit filters the amplified electrical signal, and the data processing unit processes the filtered electrical signal into a digital signal.

[0017] A third aspect of the embodiments of the present disclosure provides a display device, including a backlight module, a display module, a display control module, a filter, a signal processing module, and the image sensor, where the backlight module includes An illumination driving module, a light concentrating plate and an infrared light emitting module;

[0018] the backlight module, the display control module, the display module, and the filter are sequentially stacked

The image sensor is disposed between the filter and the display module or between the display module and the backlight module, and an area of the image sensor is less than or equal to an area of the display module, The display control module and the display module are electrically connected, the signal processing module is electrically connected to the image sensor, the light emitting driving module is electrically connected to the infrared light emitting module, and the filter is transparent to light infrared light. And visible light;

[0019] The signal processing module controls the infrared light emitting module to emit infrared light, and the infrared light emitting module emits infrared light, and the infrared light is uniformly emitted after being transmitted through the light homogenizing plate, and the uniformly emitted infrared light is transmitted through The display control module, the display module and the light transmissive area of the image sensor and the filter, the filter filters the optical signal reflected by the object to obtain reflected infrared light, and the image sensor receives The reflected infrared light is converted into an electrical signal, and the signal processing module processes the electrical signal For digital signals;

And [0020] the display control module controls the display module to emit visible light, and the visible light is transmitted through the light transmissive area of the image sensor and the filter.

[0021] A fourth aspect of the embodiments of the present disclosure provides a display device, including a backlight module, a display module, a display control module, a filter, a signal processing module, and the image sensor, where the backlight module includes a light emitting driving module, a light concentrating plate, a visible light emitting module, and the infrared light emitting module;

[0022] the backlight module, the display control module, the display module, and the filter are sequentially stacked, and the image sensor is disposed between the filter and the display module or the display Between the module and the backlight module, the area of the image sensor is less than or equal to the area of the display module, the display control module and the display module are electrically connected, and the signal processing module and the image sensor are electrically The light-emitting driving module is electrically connected to the visible light emitting module and the infrared light emitting module, and the filter transmits light infrared light and visible light;

[0023] The illumination driving module controls the infrared light emitting module to emit infrared light, and the infrared light emitting module emits infrared light, and the infrared light is uniformly transmitted after being transmitted through the light homogenizing plate, and the display control module controls the The display module transmits the uniformly emitted infrared light, and the uniformly emitted infrared light also passes through the transparent region of the image sensor and the filter, and the filter performs an optical signal reflected by the object. Filtering to obtain reflected infrared light, the image sensor receives the reflected infrared light and converts it into an electrical signal, and the signal processing module processes the electrical signal into a digital signal;

[0024] The light-emitting driving module controls the visible light emitting module to emit light, the visible light emitting module emits visible light, and the display control module controls the display module to display, the visible light transmits light through the image sensor The area and the filter are emitted.

Advantageous effects of the invention

Beneficial effect

[0025] The embodiment of the present invention provides an image sensing unit including a photosensitive element, a light transmitting area, and an opaque area, so that the light transmitting area transmits visible light and infrared light, so that the photosensitive element can receive the object reflection. The infrared light is converted into an electrical signal, so that the image sensing unit has a visible light transmission function and an infrared light collection function, so that the image sensing unit can be well compatible with the display screen, and the creature can be collected after the screen is turned off. Feature image. Brief description of the drawing

DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present solution, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are some implementations of the present solution. For example, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic structural diagram of an image sensing unit according to Embodiment 1 of the present application;

2 is a schematic structural diagram of an image sensor according to Embodiment 2 of the present embodiment;

3 is a schematic structural diagram of an image sensor according to Embodiment 3 of the present embodiment;

4 is a schematic structural diagram of an image sensor according to Embodiment 4 of the present embodiment;

5 is a schematic structural diagram of a display device according to Embodiment 5 of the present embodiment;

6 is a schematic structural diagram of a display device provided in Embodiment 6 of the present solution.

Embodiments of the invention

[0033] In the following description, for the purposes of illustration and description, reference However, it will be apparent to those skilled in the art that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention.

[0034] In order to explain the technical solutions described in the present solution, the following description will be made by way of specific embodiments.

[0035] Embodiment 1:

As shown in FIG. 1 , an embodiment of the present invention provides an image sensing unit 100 including a photosensitive element 10 , a light transmitting region 20 , and an opaque region 30 . The photosensitive element 10 is disposed in an opaque manner. The light-transmitting region 20 is permeable to at least visible light and infrared light, and the light-receiving element 10 is configured to receive infrared light reflected by the object and convert it into an electrical signal.

[0037] In a specific application, the photosensitive member may specifically include any type of photoelectric conversion device, and may further include a peripheral circuit connected to the photoelectric conversion device.

[0038] In one embodiment, the photosensitive element comprises a photodiode, a photoresistor, a charge coupled component or a complementary Any of metal oxide semiconductors.

[0039] In a specific application, the light-transmitting region specifically refers to a transparent region that is at least transparent to visible light and infrared light, and may be made of a transparent glass substrate, a plastic substrate, or any feasible light-transmitting material. In one embodiment, the light transmissive region may also pass through other invisible light, such as ultraviolet light.

[0040] In a specific application, the opaque region may be made of a material such as opaque plastic or carbon fiber. The light-transmitting region and the opaque region may be integrally formed or closely adhered together by any means to form a thin plate structure, and the shape thereof may be generally set as needed, for example, a circle, an ellipse, a rectangle, or the like.

[0041] It is exemplarily shown in FIG. 1 that the photosensitive element 10, the light transmitting region 20, and the opaque region 30 are both rectangular.

[0042] In a specific application, the image sensing unit can be applied to an image sensor as a photosensitive pixel unit in the image sensor.

[0043] In a specific application, the image sensor composed of the photosensitive pixel unit can be applied to a terminal including a display screen such as a mobile phone, a tablet computer, a notebook computer, a personal digital assistant, etc., and can be well compatible with the display screen of the terminal, so that the display screen Biometric image capture is available regardless of whether it is bright or off.

[0044] In a specific application, the display screen may be any type of display device, for example, a thin film transistor liquid crystal display (TFT-LCD, Thin Film Transistor-Liquid Crystal)

Display), OLED (Organic Electroluminescence Display) display, QLED (Quantum Dot Light Emitting Diodes) display, etc.

[0045] Embodiment 2:

As shown in FIG. 2, an embodiment of the present disclosure provides an image sensor 200 including a transparent substrate 210 and a plurality of image sensing units 100. The plurality of image sensing units 100 are arranged in an array. On the surface of the substrate 210, the substrate 210 can transmit at least visible light and infrared light.

[0047] In a specific application, the substrate may be a glass substrate, a plastic substrate or a transparent substrate made of other materials.

[0048] In one embodiment, the substrate is a glass substrate or a plastic-based flexible substrate.

[0049] In a particular application, a plurality of image sensing units can be arranged in an array of any shape on the surface of the substrate. example For example, circular arrays, rectangular arrays, regular hexagonal arrays, and the like.

[0050] As shown in FIG. 2, the image sensor 200 is exemplarily shown to include a 4x4 array of image sensing units.

In a specific application, the number of image sensing units included in the image sensor can be set according to actual needs.

[0051] Embodiment 3:

As shown in FIG. 3, in one embodiment of the present solution, the photosensitive element 10 is electrically connected to the external signal processing module 300, and the infrared light emitting module 400 is electrically connected to the external light emitting driving module 410.

[0053] In a specific application, the infrared light emitting module may specifically include an infrared diode, an infrared LED lamp, an infrared cold cathode fluorescent lamp or an infrared LED lamp array, and may also include other peripheral circuits.

[0054] FIG. 3 exemplarily shows that the infrared light emitting module 400 is an infrared diode, and the photosensitive element 10 is a photodiode.

[0055] In a specific application, the signal processing module may be a single chip microcomputer, a control chip, a central processing unit (Centra 1 Processing Unit, CPU), or other general purpose processor, a digital signal processor (DSP), ASIC (Application Specific Integrated

Circuit, ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

[0056] In this embodiment, the illumination driving module is configured to control the infrared light emitting module to emit infrared light, and the photosensitive element is configured to receive infrared light reflected by the object and convert it into an electrical signal, and the signal processing module is configured to process the electrical signal. Digital signal.

[0057] In a specific application, the illumination driving module may be a dimmer, a switching device, or a pulse frequency control signal may be output to control a pulse frequency modulator or a chip that emits periodic pulsed infrared light by the infrared light emitting module. It can also be a logic circuit with corresponding functions.

[0058] Embodiment 4:

As shown in FIG. 4, in an embodiment of the present solution, based on the structure shown in FIG. 3, the image sensor 200 further includes a plurality of electronic switching units 220 equal in number to the plurality of image sensing units 100. Each photosensitive element 10 is electrically connected to an electronic switching unit 220, and the electronic switching unit 220 is connected between the photosensitive element 10 and the signal processing module 300. [0060] Only one electronic switching unit 220 and one photosensitive unit 10 are exemplarily shown in FIG.

[0061] In this embodiment, the electronic switching unit is configured to access the control signal, and control the corresponding photosensitive element and the signal processing module to be electrically connected or disconnected according to the control signal, and the photosensitive element is connected to the signal processing module, The signal processing module processes the electrical signal output by the photosensitive element to obtain a digital signal, and the signal transmitting module does not emit light when the connection is broken.

[0062] In a specific application, the electronic switching unit may specifically include at least one electronic type of any type, such as a triode, a field effect transistor, and the like, and may include other peripheral circuits.

[0063] The electronically-off unit 220 is exemplarily shown in FIG. 4 as a field effect transistor.

As shown in FIG. 4, in the embodiment, the signal processing module 300 specifically includes a signal amplifying unit 310 and a data processing unit 320. The signal amplifying unit 310 is electrically connected to the photosensitive element 10 and the data processing unit 320.

[0065] In this embodiment, the signal amplifying unit is configured to amplify the electrical signal, and the data processing unit is configured to process the amplified electrical signal into a digital signal.

[0066] In a specific application, the signal amplifying unit may specifically be a signal amplifier or a corresponding logic circuit, and the data processing unit may be an analog-to-digital converter or a logic circuit having a corresponding function, and the data processing unit may be a processor or have corresponding functions. Logic circuit.

As shown in FIG. 4, in the embodiment, the signal processing module 300 further includes a filtering unit 330, and the filtering unit 3

30 is electrically coupled to signal amplifying unit 320 and data processing unit 330.

[0068] In this embodiment, the filtering unit is configured to filter the amplified electrical signal, and the data processing unit is configured to process the filtered electrical signal into a digital signal.

[0069] In a specific application, the filtering unit may specifically include a filtering circuit composed of parallel filtering capacitors and resistors, and may also be other types of filtering circuits or devices.

[0070] Embodiment 5:

[0071] As shown in FIG. 5, an embodiment of the present disclosure provides a display device 1000 including a backlight module 500, a display module 600, a display control module 700, a filter 800, a signal processing module 300, and an image sensor. 200. The backlight module 500 includes a light emitting driving module (not shown), a light absorbing plate 510, and an infrared light emitting module 400.

[0072] As shown in FIG. 5, in this embodiment, the backlight module 500, the display control module 700, the display module 600, and The filter 800 is sequentially stacked, and the image sensor 200 is disposed between the filter 800 and the display module 600.

[0073] In a specific application, the image sensor may also be disposed between the display module and the backlight module or in the same layer as the display module. In Fig. 5, the image sensor 200 is exemplarily shown disposed between the filter 800 and the display module 600.

[0074] In a specific application, the image sensor is a large area image sensor whose area is comparable to the area of the display module.

[0075] In one embodiment, the area of the image sensor is less than or equal to the area of the display module.

[0076] As shown in FIG. 5, the area of the image sensor in this embodiment is equal to the area of the display module.

As shown in FIG. 5, in the embodiment, the display control module 700 and the display module 600 are electrically connected, the signal processing module 300 is electrically connected to the image sensor 200, and the illumination driving module is electrically connected to the infrared light emitting module 400.

The filter 800 transmits light infrared light and visible light.

In the present embodiment, the filter is used to filter the optical signal reflected by the object, and the object is reflected back to transmit the infrared light to the image sensor.

[0079] In a specific application, after performing biometric image acquisition, the function of the filter is to reflect or absorb the light signal that is not needed by the image sensor, and the infrared light required by the image sensor is not collected. The filter can transmit visible light. Specifically, a filter having a light transmission band and a wavelength range equivalent to or close to the infrared light may be selected.

[0080] In one embodiment, the filter is an infrared trichromatic filter that transmits infrared, red, green, and blue light. It is prepared by a special coating process, which can transmit infrared light, red light, green light and blue light, so that the display module can display three primary color images as well as images of light, such as fingerprints, veins and irises.

[0081] In a specific application, the display module is an LED display, an OLED (Organic Electroluminescence Display) display or a QLED (Quantum Dot Light Emitting Diodes)

, quantum dot light emitting diode) display. The display module can self-illuminate under the control of the display control module. Therefore, the visible light module is not required to be disposed in the backlight module, and the display device can also be normally displayed.

[0082] In a specific application, the infrared light emitting module may be disposed on a bottom surface or a side surface of the light homogenizing plate.

[0083] As shown in FIG. 5, an exemplary embodiment shows that the infrared light emitting module is disposed on the side of the light homogenizing plate. [0084] In the present embodiment, the display device 1000 further includes a transparent cover 00.

[0085] In a specific application, the transparent cover may specifically be a glass cover or a touch display panel.

[0086] In this embodiment, the illumination driving module controls the infrared light emitting module to emit infrared light, and the infrared light emitting module emits infrared light, and the infrared light is uniformly transmitted after passing through the light homogenizing plate, and the uniformly emitted infrared light passes through the display control module. The light-transmitting area of the display module and the image sensor and the filter, the filter filters the optical signal reflected by the object to obtain reflected infrared light, the image sensor receives the reflected infrared light and converts it into an electrical signal, and the signal processing module converts the electrical signal Processed as a digital signal;

[0087] The display control module controls the display module to emit visible light, and the visible light is transmitted through the light transmitting area of the image sensor and the filter.

[0088] The image sensor in the display device provided by the embodiment can achieve good integration with the display module, so that the display device can realize the collection of the biometric image in the bright screen or the off-screen state, and the image sensor can also be applied. The full-screen biometric image acquisition function of the full-screen display device is realized by the full-screen display device.

[0089] Embodiment 6:

As shown in FIG. 6 , an embodiment of the present disclosure provides a display device 2000 including a backlight module 500 , a display module 600 , a display control module 700 , a filter 800 , a signal processing module 300 , and an image sensor. 200. The backlight module 500 includes a light emitting driving module (not shown), a light absorbing plate 510, a visible light emitting module _900, and an infrared light emitting module 400.

As shown in FIG. 6, in the embodiment, the backlight module 500, the display control module 700, the display module 600, and the filter 800 are sequentially stacked, and the image sensor 200 is disposed on the filter 800 and the display module 600. Between

[0092] In a specific application, the image sensor may also be disposed between the display module and the backlight module or in the same layer as the display module. In Fig. 6, the image sensor 200 is exemplarily shown disposed between the filter 800 and the display module 600.

[0093] In a specific application, the image sensor is a large area image sensor whose area is comparable to the area of the display module.

[0094] In one embodiment, the area of the image sensor is less than or equal to the area of the display module.

[0095] As shown in FIG. 6, the area of the image sensor in this embodiment is equal to the area of the display module. As shown in FIG. 6, in the embodiment, the display control module 700 and the display module 600 are electrically connected, the signal processing module 300 is electrically connected to the image sensor 200, and the light-emitting driving module and the visible light emitting module and the infrared light emitting module 400 are connected. Electrically connected, the filter 800 transmits light infrared light and visible light.

In this embodiment, the filter is used to filter the light signal reflected by the object, and the object is reflected back to transmit the infrared light to the image sensor.

[0098] In a specific application, after performing biometric image acquisition, the function of the filter is to reflect or absorb the light signal that is not needed by the image sensor, and the infrared light required by the image sensor is not used for image acquisition of the infrared image. The filter can transmit visible light. Specifically, a filter having a light transmission band and a wavelength range equivalent to or close to the infrared light may be selected.

[0099] In one embodiment, the filter is an infrared trichromatic filter that transmits infrared, red, green, and blue light. It is prepared by a special coating process, which can transmit infrared light, red light, green light and blue light, so that the display module can display three primary color images as well as optical biological images such as fingerprints, veins and irises.

[0100] In a specific application, the display module is a TFT-LCD (Thin Film Transistor-Liquid Crystal Display). Correspondingly, the display control module is specifically a TFT (Thin Film Transistor) liquid crystal driving chip. The display control module controls the display of the display module by adjusting the magnitude of the voltage applied to the display module and adjusting the optical axis orientation of the liquid crystal particles in the display module.

[0101] In a specific application, the visible light emitting module may specifically include an LED lamp, a cold cathode fluorescent lamp or an LED lamp array or other peripheral circuits.

[0102] In a specific application, the visible light emitting module and the infrared light emitting module may be disposed on a bottom surface or a side surface of the light homogenizing plate.

[0103] As shown in FIG. 6, exemplarily shown that the visible light emitting module 900 and the infrared light emitting module 400 are disposed on the side of the light absorbing plate.

[0104] In the present embodiment, the display device 2000 further includes a transparent cover 00.

[0105] In a specific application, the transparent cover may specifically be a glass cover or a touch display panel.

[0106] In this embodiment, the illumination driving module controls the infrared light emitting module to emit infrared light, and the infrared light emitting module emits infrared light, and the infrared light is uniformly transmitted after passing through the light homogenizing plate, and the display control module controls the display module to transmit through The uniformly emitted infrared light, the uniformly emitted infrared light also passes through the light transmitting area of the image sensor and the filter, and the filter filters the reflected light signal of the object to obtain reflected infrared light, and the image sensor receives the reflected infrared light and Converted into an electrical signal, the signal processing module processes the electrical signal into a digital signal;

[0107] The illuminating driving module controls the visible light emitting module to emit light, and the visible light emitting module emits visible light. The display control module controls the display module to display, and the visible light passes through the light transmitting area of the image sensor and the filter is emitted.

[0108] The present embodiment provides a display device combining a large-area image sensor and a display module, which can realize a full-screen biometric image acquisition function of the display device without using a capacitive touch signal acquisition device, and can be applied to a full-screen display device. .

The above-mentioned embodiments are only used to explain the technical solutions of the present solution, and are not limited thereto; although the present solution has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the spirit and scope of the technical solutions of the embodiments of the present embodiments. It should be included in the scope of protection of this program.

Claims

Claim

An image sensing unit, comprising: a photosensitive element, a light transmitting region and an opaque region, wherein the photosensitive element is disposed in the opaque region;

The light transmissive area is permeable to at least visible light and infrared light, and the photosensitive element receives infrared light reflected by the object and converts it into an electrical signal.

The image sensing unit according to claim 1, wherein the photosensitive member comprises any one of a photodiode, a photoresistor, a charge coupled device, or a complementary metal oxide semiconductor.

An image sensor comprising: a light transmissive substrate and a plurality of image sensing units according to any one of claims 1 or 2, wherein the plurality of image sensing units are arranged in an array on the substrate The surface of the substrate is at least transparent to visible light and infrared light.

The image sensor according to claim 3, wherein the substrate is a glass substrate or a plastic-based flexible substrate.

The image sensor according to claim 4, wherein the photosensitive element is electrically connected to an external signal processing module, and the infrared light emitting module is electrically connected to the external light emitting driving module;

The illumination driving module controls the infrared light emitting module to emit infrared light, the photosensitive element receives infrared light reflected by the object and converts into an electrical signal, and the signal processing module processes the electrical signal to obtain a digital signal.

The image sensor according to claim 5, wherein said image sensor further comprises a plurality of electronic switching units equal in number to said plurality of image sensing units, each of said photosensitive elements and said one of said electrons The switching units are electrically connected one by one, and the electronic switching unit is connected between the photosensitive element and the signal processing module;

The electronic switching unit accesses a control signal, and controls a corresponding photosensitive element and the signal processing module to be electrically connected or disconnected according to the control signal.

The image sensor according to any one of claims 5 or 6, wherein the signal processing module includes a signal amplifying unit and a data processing unit, and the signal amplifying unit is electrically connected to the photosensitive element and the data processing unit connection; The signal amplifying unit amplifies the electrical signal, and the data processing unit processes the amplified electrical signal into a digital signal.

The image sensor according to claim 7, wherein the signal processing module further comprises a filtering unit, wherein the filtering unit is electrically connected to the signal amplifying unit and the data processing unit;

The filtering unit filters the amplified electrical signal, and the data processing unit processes the filtered electrical signal into a digital signal.

[Claim 9] A display device, comprising: a backlight module, a display module, a display control module, a filter, a signal processing module, and the image sensor according to any one of claims 3 to 8, The backlight module includes a light-emitting drive module, a light-sharing plate, and an infrared light-emitting module; the backlight module, the display control module, the display module, and the filter are sequentially stacked, and the image sensor is disposed in the Between the filter and the display module or between the display module and the backlight module, the area of the image sensor is less than or equal to the area of the display module, and the display control module and the display module are electrically Connecting, the signal processing module is electrically connected to the image sensor, the light emitting driving module is electrically connected to the infrared light emitting module, the filter is transparent to light infrared light and visible light; and the light emitting driving module controls The infrared light emitting module emits infrared light, and the infrared light passes through the light diffusing plate The emitted, uniformly emitted infrared light is transmitted through the display control module, the display module and the light transmissive area of the image sensor, and the filter, and the filter filters the optical signal reflected by the object to be reflected. Infrared light, the image sensor receives the reflected infrared light and converts it into an electrical signal, the signal processing module processes the electrical signal into a digital signal; the display control module controls the display module to emit visible light, The visible light is transmitted through the light transmitting region of the image sensor and the filter.

[Claim 10] A display device, comprising: a backlight module, a display module, a display control module, a filter, a signal processing module, and the image sensor according to any one of claims 3 to 8, The backlight module includes an illumination driving module, a light homogenizing plate, a visible light emitting module, and the infrared light emitting module; The backlight module, the display control module, the display module, and the filter are sequentially stacked, and the image sensor is disposed between the filter and the display module or the display module and the Between the backlight modules, the area of the image sensor is less than or equal to the area of the display module, the display control module and the display module are electrically connected, and the signal processing module is electrically connected to the image sensor. The illuminating driving module is electrically connected to the visible light emitting module and the infrared light emitting module, and the filter transmits light infrared light and visible light;

The illumination driving module controls the infrared light emitting module to emit infrared light, the infrared light emitting module emits infrared light, the infrared light is uniformly transmitted after being transmitted through the light homogenizing plate, and the display control module controls the display module The uniformly emitted infrared light is transmitted through the transparent region of the image sensor and the filter through the uniformly emitted infrared light, and the filter filters the optical signal reflected by the object to be reflected. Infrared light, the image sensor receives the reflected infrared light and converts it into an electrical signal, and the signal processing module processes the electrical signal into a digital signal;

The illuminating driving module controls the visible light emitting module to emit light, the visible light emitting module emits visible light, and the display control module controls the display module to display, the visible light passes through the transparent region and the image sensor The filter is emitted.