CN113984201A - Ambient light sensing structure and display panel - Google Patents
Ambient light sensing structure and display panel Download PDFInfo
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- CN113984201A CN113984201A CN202111295969.2A CN202111295969A CN113984201A CN 113984201 A CN113984201 A CN 113984201A CN 202111295969 A CN202111295969 A CN 202111295969A CN 113984201 A CN113984201 A CN 113984201A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4204—Photometry, e.g. photographic exposure meter using electric radiation detectors with determination of ambient light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13318—Circuits comprising a photodetector
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Abstract
The application provides an ambient light sensing structure and a display panel, the ambient light sensing structure comprises a first light sensing part, the first light sensing part comprises a first light sensor and a light condensing module, the light condensing module is used for converging first light rays of an incident substrate to obtain converged light rays, the first light sensor receives the converged light rays and obtains converged light intensity corresponding to the converged light rays, and the first light intensity of the first light rays is obtained by calculating the converged light intensity and the intensity enhancement coefficient of the light condensing module; the second light sensing part comprises a second light sensor and a light divergence module, the light divergence module is used for diverging the second light of the incident substrate to obtain divergent light, the second light sensor receives the divergent light and obtains divergent light intensity corresponding to the divergent light, second light intensity of the second light is calculated according to the divergent light intensity and the intensity attenuation coefficient of the divergent light module, and the ambient light sensing structure can alternatively output the first light intensity or the second light intensity as the light intensity of the current ambient light.
Description
Technical Field
The application relates to the technical field of display, in particular to an ambient light sensing structure and a display panel.
Background
In the field of medium and small-size display, a full-screen technology becomes the current key research and development direction, namely how to realize the screen occupation maximization of a human-computer interaction interface through the development of related technologies. The first generation of full-screen technology mainly focuses on the fact that the screen size proportion is changed from 16:9 to 18+:9, the second generation of full-screen technology further compresses the upper, lower, left and right boundaries of the screen, even a flexible folding technology is adopted to maximize the visible area, and the other recent trend of the full-screen technology is how to further fuse sensors of a display terminal, such as fingerprint identification, a camera, facial identification, distance sensing and the like, into the display area of the display screen, so that the display screen gradually transitions from a simple display interface to a full sensing and interaction interface.
Currently, the mainstream display technologies include LCD and OLED, wherein LCD is a passive light emitting technology, and the light and dark control of light is realized by illuminating the liquid crystal cell through a whole backlight structure, and OLED technology adopts a one-by-one OLED pixel to actively emit light, because of the advantages of high contrast, light weight, thinness, flexibility, foldability, and the like. In order to narrow the gap between LCD and OLED, how to break the LCD in-screen sensing technology becomes an important direction of whether the LCD technology can continue to occupy a place in the mainstream of the current full-screen era.
LCD in-screen sensing technology can bring many derived added values to LCDs, including in-screen fingerprints, in-screen ambient light, and even in-screen TOF, among others. At present, a conventional design scheme of in-plane integrated ambient light sensing is to arrange a group of photosensitive structures in a frame area, but because the variation range of ambient light is very large, the monitoring precision and the monitoring range are difficult to be considered at the same time.
Disclosure of Invention
The application provides an ambient light sensing structure and display panel, can solve the technical problem that hardly compromise on monitoring precision and the monitoring range.
In order to solve the above problems, the technical solution provided by the present application is as follows:
an ambient light sensing structure, comprising at least:
the first light sensing part comprises a first light sensor and a light condensation module, the light condensation module is used for converging first light rays incident to the substrate to obtain converged light rays, the first light sensor receives the converged light rays and obtains converged light intensity corresponding to the converged light rays, and the first light intensity of the first light rays is calculated according to the converged light intensity and the intensity enhancement coefficient of the light condensation module; and
the second light sensing part comprises a second light sensor and a light divergence module, the light divergence module is used for diverging second light rays of an incident substrate to obtain divergent light rays, the second light sensor receives the divergent light rays and obtains divergent light intensity corresponding to the divergent light rays, second light intensity of the second light rays is calculated according to the divergent light intensity and an intensity attenuation coefficient of the light divergence module, and the ambient light sensing structure can alternatively output the first light intensity or the second light intensity as the light intensity of current ambient light.
In some embodiments, the ambient light sensing structure further includes a control unit and a reference light sensing portion, the control unit is electrically connected to the first light sensing portion, the second light sensing portion and the reference light sensing portion, the reference light sensing portion can directly receive a third light beam passing through the substrate and obtain a third light intensity of the third light beam, the control unit determines whether the third light intensity is within a threshold range defined by a first threshold and a second threshold, if the third light intensity is within the threshold range, the control unit outputs the third light intensity as the light intensity of the current ambient light, and if the third light intensity is not within the threshold range, the control unit selectively outputs the first light intensity or the second light intensity as the light intensity of the current ambient light.
In some embodiments, if the light intensity is not within the threshold range, the reference light sensing part further determines, according to the received third light, that the third light is a weak light intensity signal or a strong light intensity signal, and if the third light is the weak light intensity signal, the control unit outputs the first light intensity as the light intensity of the current ambient light; and when the signal is a strong light intensity signal, the control unit outputs the second light intensity as the light intensity of the current ambient light.
In some embodiments, the light-gathering module includes a first lens and a second lens, the second lens includes a first upper groove, the first lens is disposed in the first upper groove, and the refractive index of the second lens is greater than the refractive index of the first lens; the light scattering module comprises a third lens and a fourth lens, the fourth lens comprises a second upper groove, the third lens is arranged on the second upper groove, and the refractive index of the fourth lens is smaller than that of the third lens.
In some embodiments, a projection area of the light incident surface of the first lens in a light incident direction is larger than an area of the first photosensitive region of the first photosensor; the projection area of the light incident surface of the third lens in the light incident direction is larger than the area of the second photosensitive area of the second photosensor.
In some of these embodiments, the second lens includes a first lower groove, the first light sensor being located in the first lower groove; the fourth lens includes a second lower groove, and the second light sensor is located in the second lower groove.
In some of these embodiments, ambient light sensing structure includes the light adjustment structure layer, the light adjustment structure layer includes two relative conductive film that set up and sets up two the liquid crystal layer between the conductive film, the light adjustment structure layer is vertically divided into first region and second region at least, first region the voltage that conductive film loaded is different with the second region the voltage that conductive film loaded, first region is used for the spotlight, the second region is used for light to disperse.
The invention also relates to a display panel.
A display panel, comprising:
an array substrate;
the color film substrate is arranged opposite to the array substrate;
a liquid crystal layer between the array substrate and the color film substrate, an
The ambient light sensing structure is arranged between the array substrate and the color film substrate, the ambient light sensing structure is electrically connected with the array substrate, ambient light can be incident to the ambient light sensing structure through the color film substrate, and the ambient light sensing structure is as claimed in any one of claims 1 to 6.
In some embodiments, a light-shielding layer is further disposed on a surface of the color film substrate facing the array substrate, the light-shielding layer is provided with at least two light incident holes, the at least two light incident holes are respectively disposed corresponding to the first lens and the third lens included in the ambient light sensing structure, and the size of the light incident hole is smaller than the size of the light incident surface of the first lens and the size of the light incident surface of the third lens.
In some embodiments, the display panel is longitudinally divided into at least a first region and a second region, and a voltage applied across the liquid crystal layer in the first region is different from a voltage applied across the liquid crystal layer in the second region.
Compared with the prior art, the ambient light sensing structure and the display panel at least comprise a first light sensing part and a second light sensing part, wherein the first light sensing part comprises a first light sensor and a light condensing module, the light condensing module is used for condensing first light rays of an incident substrate to obtain condensed light rays, the first light sensor receives the condensed light rays and obtains condensed light intensity corresponding to the condensed light rays, and the first light intensity of the first light rays is calculated according to the condensed light intensity and the intensity enhancement coefficient of the light condensing module; the second light sensing part comprises a second light sensor and a light divergence module, the light divergence module is used for diverging second light rays of an incident substrate to obtain divergent light rays, the second light sensor receives the divergent light rays and obtains divergent light intensity corresponding to the divergent light rays, second light intensity of the second light rays is calculated according to the divergent light intensity and an intensity attenuation coefficient of the light divergence module, the environment light sensing structure can selectively output first light intensity or the second light intensity as light intensity of current environment light according to intensity of the environment light, and the technical effects that monitoring precision and a monitoring range can be met are achieved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a functional block diagram of an ambient light sensing structure included in the display panel shown in fig. 1;
FIG. 3 is a light path diagram of the display panel provided in FIG. 2 in operation;
fig. 4 is a schematic cross-sectional view of a display panel according to yet another embodiment of the present disclosure.
Description of the reference numerals
100. 110-ambient light sensing structure; 1-an array substrate; 2-color film substrate
10-a first light sensing section; 12-a first light sensor; 14-a light-gathering module;
20-a second light sensing section; 22-a second light sensor; 24-a light spreading module;
30-a reference light-sensing section; 140-a first lens; 142-a second lens;
240-third lens; 242-a fourth lens; 101-a first upper groove; 50-a control unit;
103-a second upper groove; 201-a first lower groove; 203-a second lower groove;
6-light adjusting structure layer; 4-a light-shielding layer; 40-light inlet holes; 105-a first photosensitive region;
205-a second photosensitive area; 200. 300-a display panel; 210-a first area; 220-a second area;
111-a first light; 121-a second light ray; 131-a third light;
113-converging the light; 123-divergent light rays.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. The ambient light sensing structure and the display panel of the present application are described in detail with reference to the embodiments below.
Example 1
Referring to fig. 1, fig. 1 is a display panel 200 according to the present invention. The display panel 200 includes: an array substrate 1, a color filter substrate 2, a liquid crystal layer (not shown), and an ambient light sensing structure 100. The display panel 200 includes a display area and a non-display area, the ambient light sensing structure 100 is disposed in the non-display area, and the color film substrate 2 can transmit light at the position of the non-display area. That is, the color filter substrate 2 is transparent in the non-display region, so that the external ambient light can be incident on the ambient light sensing structure 100.
The display panel 200 is a liquid crystal display panel. The ambient light sensing structure 100 may automatically adjust the screen brightness according to the brightness of the external environment, and may also automatically turn on a flash lamp or perform light supplement when photographing according to the external environment. In the present embodiment, a conventional external photosensitive device is integrated inside the array substrate 1, and more specifically, the light sensor of the ambient light sensing structure 100 is integrated on the array substrate 1, so that the thickness of the display panel 200 can be reduced, and the cost can be reduced.
The array substrate 1 is a conventional structure, and includes: the liquid crystal display panel comprises a substrate, a plurality of pixel units arranged on the substrate, a grid line, a data line and a switch element. The grid line and the data line are positioned on the substrate base plate, cross each other and are insulated with each other to define a plurality of pixel units; the switching element is located in the pixel unit and connected with the grid line and the data line. In some examples, the switching element is a thin film transistor including a gate electrode, a source electrode, a drain electrode, a semiconductor layer, and a gate insulating layer. The semiconductor layer is located right above the gate electrode and is connected to the source electrode and the drain electrode, respectively. The gate insulating layer covers the gate electrode and is configured to insulate the gate electrode from the source electrode, the drain electrode, and the semiconductor layer.
The color film substrate 2 is arranged opposite to the array substrate 1. The color film substrate 2 is formed with color resin and a black matrix, the color resin corresponds to the pixel electrode on the array substrate 1, and the black matrix corresponds to the area of the array substrate 1 except the pixel electrode.
A liquid crystal layer is arranged between the color film substrate 2 and the array substrate 1, and conductive films are respectively arranged on two opposite sides of the liquid crystal layer. It can be understood that the conductive films are respectively located on the surfaces of the color film substrate 2 and the array substrate 1, and liquid crystal molecules can deflect when a voltage is applied to the conductive films. It is understood that the liquid crystal layer is disposed in the display region, but since the ambient light sensing structure 100 in this embodiment is disposed in the non-display region, the liquid crystal layer is not shown in fig. 1.
In this embodiment, a light-shielding layer 4 is further disposed on a surface of the color filter substrate 2 facing the array substrate 1, and the light-shielding layer 4 is provided with a plurality of light incident holes 40. The light-shielding layer 4 here may be black ink. That is, the light shielding layer 4 is used to block the light inside the display panel 200 from exiting, and the light incident hole 40 is used to enable the external light to enter the corresponding ambient light sensing structure 100.
The ambient light sensing structure 100 is disposed between the array substrate 1 and the color film substrate 2, the ambient light sensing structure 100 is electrically connected to the array substrate 1, and ambient light can enter the ambient light sensing structure 100 through the color film substrate 2 and the light inlet 40.
Referring to fig. 1-2, the ambient light sensing structure 100 includes: a first light receiving section 10, a second light receiving section 20, a reference light receiving section 30, and a control unit 50. The control unit 50 is electrically connected to the first light receiving unit 10, the second light receiving unit 20, and the reference light receiving unit 30.
Specifically, referring to fig. 3, the first light sensing portion 10 includes a first light sensor 12 and a light condensing module 14, where the light condensing module 14 is configured to condense a first light 111 incident on a substrate (herein, a color film substrate 2) to obtain a condensed light 113, the first light sensor 12 receives the condensed light 113 and obtains a condensed light intensity corresponding to the condensed light 113, and calculates a first light intensity of the first light 111 according to the condensed light intensity and an intensity enhancement coefficient K1(K1>1) of the light condensing module 14. The substrate is preferably a transparent substrate, and does not affect the accuracy of detection of the ambient light intensity. That is to say, the light condensing module 14 deflects the incident direction of the light, so as to increase the light incident on the first photosensitive area 105 of the first light sensor 12, and prevent the detection accuracy of the ambient light sensing structure 100 from decreasing due to too weak light intensity of the first light 111.
Specifically, the second light sensing section 20 includes a second photosensor 22 and a light diverging module 24. The light scattering module 24 is configured to scatter a second light 121 incident on the substrate to obtain a scattered light 123, and the second optical sensor 22 receives the scattered light 123, obtains a scattered light intensity corresponding to the scattered light 123, and calculates a second light intensity of the second light 121 according to the scattered light intensity and an intensity attenuation coefficient K2(K2<1) of the light scattering module 24.
The ambient light sensing structure 100 can selectively output the first light intensity or the second light intensity as the light intensity of the current ambient light according to the intensity of the ambient light. That is to say, the light scattering module 24 deflects the incident direction of the light, so as to reduce the incident light reaching the second light sensor 22, and prevent the detection accuracy of the ambient light sensing structure 100 from decreasing due to too strong light intensity of the second light 121.
Specifically, the reference light sensing unit 30 can directly receive the third light beam 131 transmitted through the substrate and obtain the third light intensity of the third light beam 131, the control unit 50 determines whether the third light intensity is within a threshold range defined by the first threshold and the second threshold, and if the third light intensity is within the threshold range, the control unit 50 outputs the third light intensity as the light intensity of the current ambient light.
If the light intensity is not within the threshold range, the reference light sensing part 30 further determines, according to the received third light 131, that the third light 131 is a weak light intensity signal or a strong light intensity signal, and if the third light 131 is the weak light intensity signal, the control unit 50 outputs the first light intensity as the light intensity of the current ambient light; when the signal is a strong light intensity signal, the control unit 50 outputs the second light intensity as the light intensity of the current ambient light.
The intensity enhancement coefficient K1 is a ratio of the light intensity obtained by the first light-receiving section 10 to the light intensity obtained by the reference light-receiving section 30 at the same light intensity. The intensity attenuation coefficient K2 is a ratio of the light intensity obtained by the second light receiving unit 20 to the light intensity obtained by the reference light receiving unit 30 at the same light intensity. The intensity enhancement factor and the intensity attenuation factor are calibrated prior to forming the ambient light sensing structure 100.
In this embodiment, the first photosensor 12, the second photosensor 22, and the reference photosensitive section 30 may be implemented by thin film transistors.
Specifically, in this embodiment, the light condensing module 14 includes a first lens 140 and a second lens 142, the first lens 140 includes a first upper groove 101, the second lens 142 is disposed in the first upper groove 101, and a refractive index of the second lens 142 is greater than a refractive index of the first lens 140. The shape of the first upper groove 101 is matched with the shape of the second lens 142, so that the second lens 142 can be just positioned in the first upper groove 101, and the light incident surface of the second lens 142 is flush with the upper surface of the first lens 140. In this way, the light collecting module 14 can be made thin.
The light diverging module 24 includes a third lens 240 and a fourth lens 242, the third lens 240 includes a second upper groove 103, the fourth lens 242 is disposed in the second upper groove 103, and the refractive index of the fourth lens 242 is smaller than the refractive index of the third lens 240.
Preferably, in this embodiment, a projection area of the light incident surface of the first lens 140 in the light incident direction is larger than an area of the first photosensitive region 105 of the first photosensor 12; the projection area of the light incident surface of the third lens 240 in the light incident direction is larger than the area of the second photosensitive region 205 of the second photosensor 22.
The second lens 142 includes a first lower groove 201, and the first photosensor 12 is located in the first lower groove 201; the fourth lens 242 includes a second lower groove 203, and the second light sensor 22 is located in the second lower groove 203, so that the overall size of the ambient light sensing structure 100 can also be reduced.
In this embodiment, the light shielding layer 4 is provided with at least two light incident holes 40, the at least two light incident holes 40 are respectively disposed corresponding to the first lens 140 and the third lens 240 included in the ambient light sensing structure 100, and the size of the light incident hole 40 is smaller than the size of the light incident surfaces of the first lens 140 and the third lens 240. Therefore, the light entering through the light inlet 40 can pass through the light scattering module 24 or the light focusing module 14, and the light scattering module 24 or the light focusing module 14 adjusts the light transmission direction. In the present embodiment, the number of the light entrance holes 40 is three, and corresponds to the positions of the first light receiving unit 10, the second light receiving unit 20, and the reference light receiving unit 30.
In the present invention, since the ambient light sensing structure 100 includes the first light sensor 12, the second light sensor 22 and the reference light sensing section 30, therefore, each light sensor only needs to sense the luminous flux in a certain sensing range, and the situation that the light intensity is too strong and the light intensity is detected by only one light sensor, the range exceeds the light sensor and can not be detected, or the light intensity is too weak and the light intensity is detected by only one light sensor and can not be detected by the light sensor is avoided, in the invention, each light sensor has a corresponding detection range, therefore, the detection range of the light intensity is expanded, and because the light sensors with different light sensitive ranges or light sensitive precisions are used for detection from weak light to strong light, therefore, the light intensity value output by the ambient light sensing structure 100 of the present invention is more accurate, and the technical problem of considering both the monitoring precision and the monitoring range is solved.
Referring to fig. 3, the ambient light sensing structure 100 works according to the following principle: the control unit 50 determines whether the third light intensity corresponding to the third light ray 131 is within a threshold range defined by the first threshold and the second threshold according to the third light ray 131 received by the reference light sensing unit 30, and if the third light intensity is within the threshold range, the control unit 50 outputs the third light intensity as the light intensity of the current ambient light. For example, the threshold range is between 10lux and 150lux, and the third light intensity is 30lux, which is within 10lux and 150lux of the threshold range, the third light intensity is the current light intensity of the ambient light.
If the light intensity is not within the threshold range, the reference light sensing portion 30 further determines that the third light beam 131 is a weak light intensity signal or a strong light intensity signal according to the received third light beam 131. When the third light intensity obtained by the reference light sensing part 30 is 0.2lux, the control unit 50 determines that the light of the ambient light is too weak, and the control unit 50 determines that the third light 131 is a weak light intensity signal, the light condensing module 14 needs to be used for condensing the first light 111, so that more first light 111 can be incident to the first light sensing area 105 of the first light sensor 12, the first light sensing area 105 of the first light sensor 12 obtains the condensed light intensity corresponding to the condensed light 113, the first light intensity of the first light 111 is calculated according to the condensed light intensity and the intensity enhancement coefficient of the light condensing module 14, and the control unit 50 outputs the first light intensity as the light intensity of the current ambient light.
When the third light intensity obtained by the reference light-sensing portion 30 is 200lux, which means that the ambient light is too strong and directly reaches the maximum threshold of the reference light-sensing portion 30, and there is a possibility of explosion, the control unit 50 determines that the light of the current ambient light is too strong, that is, the control unit 50 determines that the third light 131 is a strong light intensity signal, the light-diverging module 24 needs to be used to diverge the second light 121, so that less second light 121 enters the second light-sensing area 205 of the second light sensor 22, the second light-sensing area 205 of the second light sensor 22 obtains the divergent light intensity corresponding to the divergent light 123, and the second light intensity of the second light 121 is calculated according to the divergent light intensity and the intensity attenuation coefficient of the light-diverging module 24, and the control unit 50 outputs the second light intensity as the light intensity of the current ambient light.
It is to be understood that, for the sake of convenience of description, the light ray incident on the first light sensing section 10 is referred to as a first light ray 111, the light ray incident on the second light sensing section 20 is referred to as a second light ray 121, and the light ray incident on the reference light sensing section 30 is referred to as a third light ray 131; in fact, since the first light 111, the second light 121, and the third light 131 are in the same ambient light condition, the light intensities of the first light 111, the second light 121, and the third light 131 are the same.
Example 2
Referring to fig. 4, fig. 4 is a display panel 300 according to a second embodiment of the present application. The display panel 300 provided in the second embodiment is substantially the same as the display panel 200 provided in the first embodiment, except that: in the present embodiment, the display panel 300 includes an ambient light sensing structure 110 different from the ambient light sensing structure 100 of the first embodiment.
In the present embodiment, the ambient light sensing structure 110 includes a light adjusting structure layer 6 in addition to the first light sensing portion 10, the second light sensing portion 20, the reference light sensing portion 30 and the control unit 50. The light modifying structure layer 6 includes conductive films (not shown) and a liquid crystal layer (not shown) disposed between the conductive films. The liquid crystal layer is obtained by mixing liquid crystal, polymer and photo-initiated cross-linking agent according to a preset proportion and then curing the mixture through ultraviolet irradiation at a certain temperature. The liquid crystal layer has the property of changing the transmittance electrically, namely the electric field intensity between the two conductive films can be adjusted by adjusting the voltage loaded on the two conductive films, so that the adjustment of the refractive index state of liquid crystal droplets in the liquid crystal layer is realized, and finally the adjustment of the throughput of incident light can be realized.
The display panel 200 is longitudinally divided into at least a first region 210 and a second region 220, a voltage applied to two ends of the liquid crystal layer of the first region 210 is different from a voltage applied to the liquid crystal layer of the second region 220, the first region 210 is used for condensing light, and the second region 220 is used for diverging light. It is understood that the display panel 200 may be further divided into a first region 210, a second region 220 and a third region (not shown) in the longitudinal direction, where the third region corresponds to the reference photosensitive section 30 of the first embodiment.
That is, in this embodiment, the non-display region is also provided with a liquid crystal layer instead of the light condensing module 14 and the light diverging module 24 in the first embodiment, and the adjustment of the refractive index state of the liquid crystal droplets in the liquid crystal layer is further realized by adjusting the electric field intensity between the two conductive films, so as to finally realize the adjustment of the throughput of the incident light.
Compared with the prior art, the ambient light sensing structure 100 and the display panels 200 and 300 provided by the present application, in addition to the reference light sensing portion 30, further include a first light sensor 12, a light condensing module 14, a second light sensor 22 and a light diverging module 24, when the light flux sensed by the reference light sensing portion 30 is smaller than the first threshold, the control unit 50 can calculate the light intensity of the current ambient light according to the second light flux of the light rays penetrating through the substrate and converged by the light condensing module 14 and the intensity enhancement coefficient of the light condensing module 14, and output the light intensity; when the luminous flux of benchmark sensitization portion 30 sensing is greater than during the second threshold value, light scattering module 24 scatters the light that sees through the base plate and incides to second light sensor 22, control unit 50 reaches according to the second luminous flux of second light sensor 22 sensing light scattering module 24's intensity attenuation coefficient confirms current ambient light's luminous intensity and output to strengthen less strong light, scatter stronger light, realized the monitoring of the ambient light of different intensity according to intensity enhancement coefficient or intensity attenuation coefficient again, realized the technological effect that monitoring accuracy and monitoring range can both satisfy.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. An ambient light sensing structure, comprising at least:
the first light sensing part comprises a first light sensor and a light condensation module, the light condensation module is used for converging first light rays incident to the substrate to obtain converged light rays, the first light sensor receives the converged light rays and obtains converged light intensity corresponding to the converged light rays, and the first light intensity of the first light rays is calculated according to the converged light intensity and the intensity enhancement coefficient of the light condensation module; and
the second light sensing part comprises a second light sensor and a light divergence module, the light divergence module is used for diverging second light rays of an incident substrate to obtain divergent light rays, the second light sensor receives the divergent light rays and obtains divergent light intensity corresponding to the divergent light rays, second light intensity of the second light rays is calculated according to the divergent light intensity and an intensity attenuation coefficient of the light divergence module, and the ambient light sensing structure can alternatively output the first light intensity or the second light intensity as the light intensity of current ambient light.
2. The ambient light sensing structure according to claim 1, further comprising a control unit and a reference light sensing portion, wherein the control unit is electrically connected to the first light sensing portion, the second light sensing portion and the reference light sensing portion, the reference light sensing portion is capable of directly receiving a third light beam transmitted through the substrate and obtaining a third light intensity of the third light beam, the control unit determines whether the third light intensity is within a threshold range defined by a first threshold and a second threshold, if so, the control unit outputs the third light intensity as the light intensity of the current ambient light, and if not, the control unit alternatively outputs the first light intensity or the second light intensity as the light intensity of the current ambient light.
3. The ambient light sensing structure of claim 2, wherein if the ambient light sensing structure is not within the threshold range, the reference light sensing portion further determines, according to the received third light, that the third light is a weak light intensity signal or a strong light intensity signal, and if the third light is the weak light intensity signal, the control unit outputs the first light intensity as the light intensity of the current ambient light; and when the signal is a strong light intensity signal, the control unit outputs the second light intensity as the light intensity of the current ambient light.
4. The ambient light sensing structure of claim 1, wherein the light condensing module comprises a first lens and a second lens, the second lens comprises a first upper groove, the first lens is disposed in the first upper groove, and a refractive index of the second lens is greater than a refractive index of the first lens; the light scattering module comprises a third lens and a fourth lens, the fourth lens comprises a second upper groove, the third lens is arranged on the second upper groove, and the refractive index of the fourth lens is smaller than that of the third lens.
5. The ambient light sensing structure of claim 4, wherein a projection area of the light incident surface of the first lens in the light incident direction is larger than an area of the first light sensing region of the first light sensor; the projection area of the light incident surface of the third lens in the light incident direction is larger than the area of the second photosensitive area of the second photosensor.
6. The ambient light sensing structure of claim 5, wherein the second lens includes a first lower recess, the first light sensor being located in the first lower recess; the fourth lens includes a second lower groove, and the second light sensor is located in the second lower groove.
7. The ambient light sensing structure of claim 1, wherein the ambient light sensing structure comprises a light adjusting structure layer, the light adjusting structure layer comprises two oppositely disposed conductive films and a liquid crystal layer disposed between the two conductive films, the light adjusting structure layer is longitudinally divided into at least a first region and a second region, the voltage loaded on the conductive film of the first region is different from the voltage loaded on the conductive film of the second region, the first region is used for condensing light, and the second region is used for light diffusion.
8. A display panel, comprising:
an array substrate;
the color film substrate is arranged opposite to the array substrate;
a liquid crystal layer between the array substrate and the color film substrate, an
The ambient light sensing structure is arranged between the array substrate and the color film substrate, the ambient light sensing structure is electrically connected with the array substrate, ambient light can be incident to the ambient light sensing structure through the color film substrate, and the ambient light sensing structure is as claimed in any one of claims 1 to 6.
9. The display panel according to claim 8, wherein a light-shielding layer is further disposed on a surface of the color film substrate facing the array substrate, the light-shielding layer is provided with at least two light inlets, the at least two light inlets are respectively disposed corresponding to the first lens and the third lens included in the ambient light sensing structure, and a size of the light inlet is smaller than sizes of light incident surfaces of the first lens and the third lens.
10. The display panel according to claim 8, wherein the display panel is longitudinally divided into at least a first region and a second region, and a voltage applied across the liquid crystal layer in the first region is different from a voltage applied across the liquid crystal layer in the second region.
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