CN113984201B - Ambient light sensing structure and display panel - Google Patents
Ambient light sensing structure and display panel Download PDFInfo
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- CN113984201B CN113984201B CN202111295969.2A CN202111295969A CN113984201B CN 113984201 B CN113984201 B CN 113984201B CN 202111295969 A CN202111295969 A CN 202111295969A CN 113984201 B CN113984201 B CN 113984201B
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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 environment light sensing structure and a display panel, wherein the environment light sensing structure comprises a first photosensitive part, the first photosensitive 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 is used for receiving the condensed light rays and obtaining 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 an 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 the 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 divergent light intensity and intensity attenuation coefficient of the divergent module, and the ambient light sensing structure can alternatively output the first light intensity or the second light intensity as light intensity of 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-small-size display, the comprehensive screen technology becomes the current key research and development direction, namely, how to realize the maximization of the screen occupation ratio of the man-machine interaction interface through the development of related technologies. The first generation of comprehensive screen technology mainly focuses on the change of the screen size ratio from 16:9 to 18:9, the second generation of comprehensive screen is to further compress the boundaries of the screen up, down, left and right, and even to maximize the visual area by adopting a flexible folding technology, and the other trend of the recent comprehensive screen is how to further fuse the fingerprint recognition, camera, face recognition, distance sensing and other sensors of the display terminal into the display area of the display screen, so that the display screen gradually transits from a simple display interface to a comprehensive perception and interaction interface.
The current mainstream display technology includes LCD and OLED, in which LCD is a passive light emitting technology, and the brightness control of light is realized by illuminating the liquid crystal cell with the whole backlight structure, while OLED technology adopts active light emission of each OLED pixel, which has advantages of high contrast, light weight, flexibility, and foldability. To reduce the gap between LCD and OLED, how to break down LCD in-screen sensing technology is an important direction of whether LCD technology can continue to occupy a place in the mainstream of the current full-screen era.
LCD on-screen sensing technology can bring many derived added value to LCDs, including on-screen fingerprints, on-screen ambient light, even on-screen TOF, etc. The conventional design scheme of in-plane integrated environment light sensing is to arrange a group of photosensitive structures in a frame area, but the monitoring precision and the monitoring range are difficult to be considered due to the very large variation range of the environment light.
Disclosure of Invention
The application provides an ambient light sensing structure and display panel, can solve the technical problem that it is difficult to compromise on monitoring accuracy and the monitoring scope.
In order to solve the problems, the technical scheme provided by the 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 gathering module, wherein the light gathering module is used for gathering first light rays of an incident substrate to obtain gathered light rays, the first light sensor receives the gathered light rays and obtains gathered light intensity corresponding to the gathered light rays, and the first light intensity of the first light rays is calculated according to the gathered light intensity and the intensity enhancement coefficient of the light gathering module; and
the second light sensing part comprises a second light sensor and a light divergence module, wherein 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 intensities corresponding to the divergent light rays, second light intensities of the second light rays are calculated according to the divergent light intensities and intensity attenuation coefficients of the light divergence module, and the ambient light sensing structure can alternatively output the first light intensities or the second light intensities to serve as light intensities of current ambient light.
In some embodiments, the ambient light sensing structure further includes a control unit and a reference light sensing portion, where 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 the third light transmitted through the substrate and obtain a third light intensity of the third light, the control unit determines whether the third light intensity is within a threshold range defined by the first threshold and the second threshold, if the third light intensity is within the threshold range, the control unit outputs the third light intensity as a light intensity of the current ambient light, and if the third light intensity is not within the threshold range, the control unit alternatively outputs the first light intensity or the second light intensity as a light intensity of the current ambient light.
In some embodiments, if the first light intensity is not within the threshold range, the reference light sensing portion further determines that the third light is a weak light intensity signal or a strong light intensity signal according to the received third light, and if the third light is a 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 strong signal, the control unit outputs the second light intensity as the light intensity of the current ambient light.
In some embodiments, the condensing 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 a refractive index of the second lens is greater than a refractive index of the first lens; the light divergence module comprises a third lens and a fourth lens, the fourth lens comprises a second upper groove, the third lens is arranged in 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 the light incident direction is larger than an area of the first photosensitive area 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 light sensor.
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 comprises a second lower groove, and the second light sensor is positioned in the second lower groove.
In some embodiments, the ambient light sensing structure includes a light adjustment structure layer, the light adjustment structure layer includes two conductive films disposed opposite to each other and a liquid crystal layer disposed between the two conductive films, the light adjustment structure layer is longitudinally divided into at least a first region and a second region, a voltage applied to the conductive films in the first region is different from a voltage applied to the conductive films in the second region, the first region is used for condensing light, and the second region is used for dispersing light.
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, and
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 enter the ambient light sensing structure through the color film substrate, and the ambient light sensing structure is any one of the ambient light sensing structures.
In some embodiments, a light shielding layer is further disposed on a surface of the color film substrate facing the array substrate, at least two light incident holes are formed in the light shielding layer, 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 a size of the light incident holes is smaller than a size of light incident surfaces of the first lens and 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 to the liquid crystal layer in the second region.
Compared with the prior art, the environment 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 is used for receiving the condensed light rays and acquiring 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 an 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, and the environment light sensing structure can alternatively output first light intensity or second light intensity as the light intensity of current environment light according to the intensity of the environment light, so that the technical effects that both monitoring precision and monitoring range can be met are achieved.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific 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 disclosure.
FIG. 2 is a schematic diagram of functional modules of an ambient light sensing structure included in the display panel provided in FIG. 1;
FIG. 3 is a light path diagram of the display panel of FIG. 2 in operation;
fig. 4 is a schematic cross-sectional view of a display panel according to another embodiment of the disclosure.
Description of the reference numerals
100. 110-an ambient light sensing structure; 1-an array substrate; 2-color film substrate
10-a first photosensitive part; 12-a first light sensor; 14-a light gathering module;
20-a second photosensitive part; 22-a second light sensor; 24-a light divergence module;
30-a reference photosensitive part; 140-a first lens; 142-a second lens;
240-a third lens; 242-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-a light-adjusting structural layer; 4-a light shielding layer; 40-entering the light hole; 105—a first photosensitive region;
205-a second photosensitive region; 200. 300-a display panel; 210-a first region; 220-a second region;
111-a first ray; 121-a second ray; 131-third ray;
113-converging light; 123-divergent light.
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 will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. The following describes the ambient light sensing structure and the display panel of the present application in detail with reference to specific embodiments.
Example 1
Referring to fig. 1, fig. 1 is a schematic diagram of a display panel 200 according to the present invention. The display panel 200 includes: the color film comprises an array substrate 1, a color film 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 is capable of transmitting light at the position of the non-display area. That is, the color film substrate 2 is transparent in the non-display area, so that the ambient light from the outside can be incident to the ambient light sensing structure 100.
The display panel 200 is a liquid crystal display panel. The ambient light sensing structure 100 can automatically adjust the brightness of the screen according to the brightness of the external environment, or automatically turn on a flash or supplement light when photographing according to the external environment. In the present embodiment, the conventional externally hung photosensitive device is integrated inside the array substrate 1, and more specifically, the photosensor 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 has a conventional structure, for example, including: the liquid crystal display device comprises a substrate, a plurality of pixel units, gate lines, data lines and switching elements, wherein the pixel units, the gate lines, the data lines and the switching elements are arranged on the substrate. The grid lines and the data lines are positioned on the substrate and mutually crossed and mutually insulated to define a plurality of pixel units; the switching element is located in the pixel unit and connected with the gate 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 directly 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 a color resin corresponding to the pixel electrode on the array substrate 1 and a black matrix corresponding to the region 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 a voltage is applied to the conductive films, so that the liquid crystal molecules can deflect. It will be appreciated that the liquid crystal layer is disposed in the display region, but since the ambient light sensing structure 100 in the present 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 the surface of the color film 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 may be black ink. That is, the light shielding layer 4 blocks the light emitted from the display panel 200, and the light incident hole 40 allows 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 energy is incident to the ambient light sensing structure 100 through the color film substrate 2 and the light incident hole 40.
Referring to fig. 1-2, the ambient light sensing structure 100 includes: a first photosensitive part 10, a second photosensitive part 20, a reference photosensitive part 30 and a control unit 50. The control unit 50 is electrically connected to the first photosensitive portion 10, the second photosensitive portion 20, and the reference photosensitive portion 30.
Specifically, referring to fig. 3, the first photosensitive 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 referred to as 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 the 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 herein preferably refers to a transparent substrate, and does not affect the detection of the accuracy of the ambient light intensity. That is, the 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 being reduced due to too weak light intensity of the first light 111.
Specifically, the second photosensitive portion 20 includes a second photosensor 22 and a light-dispersing module 24. The light diverging module 24 is configured to diverge the second light 121 incident on the substrate to obtain a diverging light 123, and the second light sensor 22 receives the diverging light 123 and obtains a diverging light intensity corresponding to the diverging light 123, and calculates a second light intensity of the second light 121 according to the diverging light intensity and an intensity attenuation coefficient K2 (K2 < 1) of the light diverging module 24.
The ambient light sensing structure 100 can alternatively output the first light intensity or the second light intensity as the current ambient light intensity according to the intensity of the ambient light. That is, the light diverging 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 intensity of the second light 121 from being too strong, which results in a technical problem of reduced detection accuracy of the ambient light sensing structure 100.
Specifically, the reference light receiving portion 30 can directly receive the third light 131 transmitted through the substrate and obtain the third light intensity of the third light 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 first light intensity is not within the threshold value range, the reference light sensing unit 30 further determines that the third light 131 is a weak light intensity signal or a strong light intensity signal according to the received third light 131, and if the third light 131 is a weak light intensity signal, the control unit 50 outputs the first light intensity as the light intensity of the current ambient light; in case of 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-sensing section 10 to the light intensity obtained by the reference light-sensing section 30 for the same light intensity. The intensity attenuation coefficient K2 is a ratio of the light intensity obtained by the second light-sensing section 20 to the light intensity obtained by the reference light-sensing section 30 in the same light intensity. The intensity enhancement coefficient and the intensity decay coefficient 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 portion 30 can be implemented by thin film transistors.
Specifically, in the present embodiment, the 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 the refractive index of the second lens 142 is greater than that 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. Thus, the light collecting module 14 can be thinned.
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 that of the third lens 240.
Preferably, in the present embodiment, the projected area of the light incident surface of the first lens 140 in the light incident direction is larger than the area of the first photosensitive area 105 of the first light sensor 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 area 205 of the second photosensor 22.
The second lens 142 includes a first lower recess 201, and the first photosensor 12 is located in the first lower recess 201; the fourth lens 242 includes a second lower groove 203, and the second photosensor 22 is located in the second lower groove 203, so that the overall size of the ambient light sensing structure 100 can 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 disposed corresponding to the first lens 140 and the third lens 240 of the ambient light sensing structure 100, respectively, and the size of the light incident holes 40 is smaller than the sizes of the light incident surfaces of the first lens 140 and the third lens 240. Therefore, the light entering through the light entrance hole 40 can pass through the light diverging module 24 or the light converging module 14, and the light diverging module 24 or the light converging module 14 adjusts the light transmission direction. In the present embodiment, the number of light entrance holes 40 is three, and corresponds to the positions of the first light receiving portion 10, the second light receiving portion 20, and the reference light receiving portion 30, respectively.
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 portion 30, each light sensor only needs to sense the light flux of a certain sensing range, so that the condition that the light intensity is too strong and the light intensity cannot be monitored when only one light sensor is used for detecting the light intensity exceeds the light sensor and the light intensity cannot be monitored or the light intensity is too weak and the light intensity cannot be detected when only one light sensor is used for detecting the light intensity is avoided.
Referring to fig. 3, the working principle of the ambient light sensing structure 100 is as follows: the control unit 50 determines, according to the third light ray 131 received by the reference light receiving unit 30, 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, 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 the threshold range of 10lux and 150lux, and the third light intensity is the light intensity of the current ambient light.
If the third light ray 131 is not within the threshold range, the reference light sensing unit 30 further determines that the third light ray 131 is a weak light intensity signal or a strong light intensity signal based on the received third light ray 131. When the third light intensity obtained by the reference light sensing portion 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 is required to condense the first light 111, so that more first light 111 can be incident on 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, and calculates the first light intensity of the first light 111 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 value of the reference light sensing portion 30, and there is a possibility that the control unit 50 determines that the current ambient light is too strong, that is, the control unit 50 determines that the third light 131 is a strong light signal, the light divergence module 24 needs to diverge the second light 121, so that less second light 121 is incident on the second light sensing region 205 of the second light sensor 22, the second light sensing region 205 of the second light sensor 22 obtains the divergent light intensity corresponding to the divergent light 123, and calculates the second light intensity of the second light 121 according to the divergent light intensity and the intensity attenuation coefficient of the light divergence module 24, and the control unit 50 outputs the second light intensity as the light intensity of the current ambient light.
It will be appreciated that, for convenience of description, the light incident on the first light sensing portion 10 is referred to as a first light 111, the light incident on the second light sensing portion 20 is referred to as a second light 121, and the light incident on the reference light sensing portion 30 is referred to as a third light 131; in fact, since the first light 111, the second light 121 and the third light 131 are under the same ambient light condition, the light intensities corresponding to the first light 111, the second light 121 and the third light 131 are all 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 by the second embodiment is substantially the same as the display panel 200 provided by the first embodiment, except that: in this 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 this embodiment, the ambient light sensing structure 110 includes the 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 adjustment 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 photoinitiated crosslinking 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 electrically changing transmittance, 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 refractive index state of liquid crystal microdroplets in the liquid crystal layer can be adjusted, 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, the voltage applied across the liquid crystal layer in the first region 210 is different from the voltage applied across the liquid crystal layer in the second region 220, the first region 210 is used for condensing light, and the second region 220 is used for dispersing 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, and the third region corresponds to the reference light receiving portion 30 of the first embodiment.
That is, in the present embodiment, the non-display area is also provided with a liquid crystal layer instead of the light condensing module 14 and the light dispersing module 24 in the first embodiment, and the adjustment of the refractive index state of the liquid crystal droplet in the liquid crystal layer is further achieved by adjusting the electric field intensity between the two conductive films, so that the adjustment of the throughput of the incident light can be finally achieved.
Compared with the prior art, the present application provides an ambient light sensing structure 100 and display panels 200 and 300, which includes, in addition to the reference light sensing portion 30, a first light sensor 12, a light gathering module 14, a second light sensor 22, and a light diverging module 24, wherein when the light flux sensed by the reference light sensing portion 30 is smaller than the first threshold value, the control unit 50 can calculate and output the light intensity of the current ambient light according to the second light flux of the light transmitted through the substrate and the intensity enhancement coefficient of the light gathering module 14, which are gathered by the light gathering module 14; when the light flux sensed by the reference light sensing portion 30 is greater than the second threshold, the light diverging module 24 diverges the light transmitted through the substrate and enters the second light sensor 22, and the control unit 50 determines the light intensity of the current ambient light according to the second light flux sensed by the second light sensor 22 and the intensity attenuation coefficient of the light diverging module 24 and outputs the light intensity, so as to enhance the weaker light, diverge the stronger light, and realize the monitoring of the ambient light with different intensities according to the intensity enhancement coefficient or the intensity attenuation coefficient, thereby realizing the technical effects that both the monitoring precision and the monitoring range can be satisfied.
In summary, although the present application has been described with reference to the preferred embodiments, the preferred embodiments are not intended to limit the application, and those skilled in the art can make various modifications and adaptations without departing from the spirit and scope of the application, and the scope of the application is therefore defined by the claims.
Claims (8)
1. An ambient light sensing structure comprising at least:
the first light sensing part comprises a first light sensor and a light gathering module, wherein the light gathering module is used for gathering first light rays of an incident substrate to obtain gathered light rays, the first light sensor receives the gathered light rays and obtains gathered light intensity corresponding to the gathered light rays, and the first light intensity of the first light rays is calculated according to the gathered light intensity and the intensity enhancement coefficient of the light gathering 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 intensities corresponding to the divergent light rays, second light intensities of the second light rays are calculated according to the divergent light intensities and intensity attenuation coefficients of the light divergence module, and the ambient light sensing structure can alternatively output the first light intensities or the second light intensities as light intensities of current ambient light;
the reference light sensing part can directly receive third light transmitted through the substrate and acquire third light intensity of the third light;
the control unit is electrically connected with the first light sensing part, the second light sensing part and the reference light sensing part, judges whether the third light intensity is in a threshold range defined by a first threshold value and a second threshold value, if the third light intensity is in the threshold range, the control unit outputs the third light intensity as the light intensity of the current environment light, if the third light intensity is not in the threshold range, the reference light sensing part also judges that the third light intensity is a weak light intensity signal or a strong light intensity signal according to the received third light, and if the third light intensity is a weak light intensity signal, the control unit outputs the first light intensity as the light intensity of the current environment light; and when the signal is a strong light strong signal, the control unit outputs the second light intensity as the light intensity of the current ambient light.
2. The ambient light sensing structure of claim 1, wherein the 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 divergence module comprises a third lens and a fourth lens, the fourth lens comprises a second upper groove, the third lens is arranged in the second upper groove, and the refractive index of the fourth lens is smaller than that of the third lens.
3. The ambient light sensing structure of claim 2, wherein a projected area of the light incident surface of the first lens in the light incident direction is larger than an area of the first photosensitive area 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 light sensor.
4. The ambient light sensing structure of claim 3, wherein the second lens comprises a first lower recess, the first light sensor being located in the first lower recess; the fourth lens comprises a second lower groove, and the second light sensor is positioned in the second lower groove.
5. The ambient light sensing structure of claim 1, wherein the ambient light sensing structure comprises a light adjusting structure layer comprising two oppositely disposed conductive films and a liquid crystal layer disposed between the two conductive films, the light adjusting structure layer being longitudinally divided into at least a first region and a second region, the conductive films of the first region being loaded with a different voltage than the conductive films of the second region, the first region being for concentrating light and the second region being for dispersing light.
6. 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, and
the environment light sensing structure is arranged between the array substrate and the color film substrate, the environment light sensing structure is electrically connected with the array substrate, environment light energy is incident to the environment light sensing structure through the color film substrate, and the environment light sensing structure is the environment light sensing structure according to any one of claims 1-5.
7. The display panel according to claim 6, 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 incident holes, the at least two light incident holes are disposed corresponding to the first lens and the third lens of the ambient light sensing structure, and the size of the light incident holes is smaller than the sizes of the light incident surfaces of the first lens and the third lens.
8. The display panel according to claim 6, wherein the display panel is divided into at least a first region and a second region in a longitudinal direction, and a voltage applied across the liquid crystal layer in the first region is different from a voltage applied to the liquid crystal layer in the second region.
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| WO2008149706A1 (en) * | 2007-06-07 | 2008-12-11 | Sharp Kabushiki Kaisha | Display device, touch panel, and detection method |
| CN101409049B (en) * | 2007-10-12 | 2011-04-27 | 群康科技(深圳)有限公司 | Liquid crystal display apparatus and display lightness regulating method thereof |
| JP5381833B2 (en) * | 2009-07-31 | 2014-01-08 | セイコーエプソン株式会社 | Optical position detection device and display device with position detection function |
| US20110063341A1 (en) * | 2009-09-15 | 2011-03-17 | Wendell Knicely | Method and system for correction, measurement and display of images |
| WO2013013230A2 (en) * | 2011-07-21 | 2013-01-24 | Jonathan Arnold Bell | Wearable display devices |
| CN106679803B (en) * | 2016-12-06 | 2018-12-11 | 广东欧珀移动通信有限公司 | The control method of sensor module, terminal and screen intensity |
| CN107426428A (en) * | 2017-07-26 | 2017-12-01 | 北京小米移动软件有限公司 | Electronic equipment and display lightness regulating method |
| CN107422571B (en) * | 2017-09-20 | 2020-08-21 | 京东方科技集团股份有限公司 | Display panel, device and control method thereof |
| CN107966209B (en) * | 2017-11-22 | 2020-07-07 | Oppo广东移动通信有限公司 | Ambient light detection method, ambient light detection device, storage medium, and electronic apparatus |
| CN110146161B (en) * | 2019-06-10 | 2021-08-13 | Oppo广东移动通信有限公司 | Method and device for detecting ambient illumination intensity and terminal |
| CN111781756A (en) * | 2020-06-05 | 2020-10-16 | 北京小米移动软件有限公司 | Display module, manufacturing method thereof and electronic equipment |
| CN111947774A (en) * | 2020-08-21 | 2020-11-17 | 深圳市汇顶科技股份有限公司 | Screen down environment optical sensor assembly and electronic equipment |
| CN112161703B (en) * | 2020-09-27 | 2023-10-27 | 深圳市汇顶科技股份有限公司 | Ambient light sensing device and electronic equipment |
| CN112577599A (en) * | 2020-12-23 | 2021-03-30 | 昆山龙腾光电股份有限公司 | Calibration method and calibration device for optical sensor and display module |
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