CN113093425A - Display panel and display device - Google Patents
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- CN113093425A CN113093425A CN202110351203.5A CN202110351203A CN113093425A CN 113093425 A CN113093425 A CN 113093425A CN 202110351203 A CN202110351203 A CN 202110351203A CN 113093425 A CN113093425 A CN 113093425A
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- 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
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- 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
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- G—PHYSICS
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- 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
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- 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
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- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The present application relates to a display panel and a display device, the display panel including: a substrate having a display area; a plurality of sub-pixels and at least one photo-sensor group on the display area, each photo-sensor group including at least two photo-sensors; the plurality of sub-pixels are distributed in rows and columns, each optical sensor is located in an area between two adjacent sub-pixels on the substrate, and the optical sensors in the same optical sensor group are connected in parallel, so that the optical sensors do not need to occupy the space of a non-display area of the display panel, the improvement of the screen occupation ratio is facilitated, the accumulation of light induction signals output by the plurality of optical sensors is realized, the intensity value of the light induction signals obtained by reading can be large enough, and the light induction sensitivity of the display panel can be improved.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
Currently, ambient light sensors are essential for smart phones. The ambient light sensor is mainly composed of a photosensitive element, and can sense the ambient light condition and inform the processing chip to automatically adjust the backlight brightness of the display. For example, when the ambient brightness is high, the lcd using the ambient light sensor will automatically turn to high brightness; when the external environment is dark, the display can be adjusted to low brightness, so that the power consumption of the product can be reduced. Therefore, the ambient light sensor can prolong the working time of the battery to the maximum extent to play a role in energy conservation, and also help the display to provide soft pictures so as to improve the visual experience of a user.
However, the ambient light sensor in the current mobile phone is a plug-in module and is arranged at the upper boundary of the mobile phone, which is not beneficial to the improvement of the screen occupation ratio of the mobile phone.
[ summary of the invention ]
An object of the present application is to provide a display panel and a display device to improve a screen ratio of the display panel.
In order to solve the above problem, embodiments of the present application provide a display panel including a substrate having a display area; a plurality of sub-pixels and at least one photo-sensor group on the display area, each photo-sensor group including at least two photo-sensors; the multiple sub-pixels are distributed in rows and columns, each light sensor is located in an area between two adjacent sub-pixels on the substrate, and the light sensors in the same light sensor group are connected in parallel.
Wherein, the display panel still includes: at least one first signal line and at least one second signal line on the substrate; the optical sensors connected in parallel in each optical sensor group are electrically connected with a corresponding first signal line and a corresponding second signal line, the first signal line is used for providing working voltage for the optical sensors, and the second signal line is used for reading optical sensing signals output by the optical sensors.
The plurality of optical sensors are distributed in rows and columns, and each optical sensor group is a row or column optical sensor correspondingly.
Wherein, the display panel still includes: and the thin film transistor layer is positioned between the substrate and the plurality of sub-pixels and comprises a thin film transistor, the thin film transistor comprises a grid layer, a grid insulating layer and a source drain layer which are sequentially arranged on the substrate, and the optical sensor and the grid layer are arranged in the same layer or the same layer as the source drain layer.
The thin film transistor layer further comprises a plurality of scanning lines extending along the row direction and a plurality of data lines extending along the column direction, the scanning lines and the gate layer are arranged on the same layer, the data lines and the source drain layer are arranged on the same layer, the scanning lines are located between two adjacent rows of sub-pixels, and the data lines are located between two adjacent columns of sub-pixels.
Wherein, the display panel still includes: and the shading layer covers the area between the two adjacent sub-pixels and does not cover the light sensor.
The sub-pixels comprise pixel electrode layers and color filter layers which are sequentially far away from the substrate, and the shading layer is located between the color filter layers of the two adjacent sub-pixels.
The light sensor and the pixel electrode layer are arranged on the same layer.
The sub-pixels comprise pixel electrode layers, light emitting layers and a common electrode layer which are sequentially far away from the substrate, and the shading layer is located between the light emitting layers of the two adjacent sub-pixels.
In order to solve the above problem, an embodiment of the present application further provides a display device including the display panel of any one of the above and a driving circuit, wherein the driving circuit is configured to supply a driving voltage to the display panel.
The beneficial effect of this application is: different from the prior art, the display panel and the display device provided by the application comprise a substrate with a display area, a plurality of sub-pixels and at least one optical sensor group, wherein the sub-pixels and the at least one optical sensor group are positioned on the display area, each optical sensor group comprises at least two optical sensors, the sub-pixels are distributed in rows and columns, each optical sensor is positioned in an area between two adjacent sub-pixels on the substrate, and the optical sensors in the same optical sensor group are connected in parallel, so that the optical sensors do not need to occupy the space of the non-display area of the display panel, the improvement of the screen occupation ratio is facilitated, the accumulation of light sensing signals output by the optical sensors is realized, the strength value of the light sensing signals obtained by reading can be large enough, and the light sensing sensitivity of the display panel can be ensured.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a display panel in the prior art;
fig. 2 is a schematic structural diagram of a display panel provided in an embodiment of the present application;
fig. 3 is another schematic structural diagram of a display panel provided in an embodiment of the present application;
fig. 4 is a schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.
[ detailed description ] embodiments
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
In the conventional display panel, as shown in fig. 1, the display panel 10 includes a display area 10A and a non-display area 10B located at the periphery of the display area 10A, for example, the non-display area 10B located at a position of a bezel on the display panel 10. Moreover, in order to realize the ambient light detection function of the display panel 10, the optical sensor 11 is generally integrated in the non-display area 10B of the display panel, but since the optical sensor 11 needs to occupy the space of the non-display area in the display panel 10, and in order to meet the ambient light sensing sensitivity requirement of the display panel 10, the area of the optical sensor 11 needs to be large enough but not small enough to ensure that the optical sensor 11 can collect enough light, and further can output the light sensing signal intensity value meeting the monitoring requirement. Therefore, the conventional display panel has the problem that the space occupied by the optical sensor in the non-display area is large, and the screen occupation ratio is influenced.
In order to improve the screen occupation ratio of the display panel, the technical scheme adopted by the application is to integrate a plurality of optical sensors in the display area of the display panel and connect the plurality of optical sensors in parallel, so that the accumulation of light induction signals output by the plurality of optical sensors is realized while the screen occupation ratio of the display panel is improved, and the light induction sensitivity of the display panel is not influenced even if the optical sensors with smaller use areas are used, and the larger light induction signal intensity value can be read.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure, and as shown in fig. 2, the display panel 20 includes a substrate 21 having a display area 21A, and a plurality of sub-pixels 22 and at least one photo sensor group located on the display area 21A. Each photosensor group can include at least two photosensors 23. The plurality of sub-pixels 22 may be arranged in rows and columns in the display area 21A. Moreover, the photo sensors 23 may be located in the area between two adjacent sub-pixels 22 on the substrate 21, for example, as shown in fig. 2, each photo sensor 23 may be located between two adjacent sub-pixels 22 in the same column, or each photo sensor 23 may be located between two adjacent sub-pixels 22 in the same row, or at least one photo sensor 23 is located between two adjacent sub-pixels 22 in the same column, and at least one photo sensor 23 is located between two adjacent sub-pixels 22 in the same row.
Specifically, as shown in fig. 2, the display area 21A may include a photosensitive area 21A-1 (e.g., an upper frame area of the display area 21A that is not easily blocked by a user of the display panel). The display area 21A is correspondingly provided with sub-pixels 22, so that the display area 21A can display images, that is, the sub-pixels 22 can be distributed on the whole display area 21A. The photo-sensing area 21A-1 is not only provided with the sub-pixels 22, but also provided with the photo-sensors 23, that is, the photo-sensors 23 are only distributed on the photo-sensing area 21A-1 of the display area 21A, so that not only can the image be displayed on the photo-sensing area 21A-1, but also the intensity of the ambient light incident into the display panel 20 can be monitored, and further the display panel 20 can automatically adjust the brightness of the display panel according to the monitoring result.
In this embodiment, at most one photo sensor 23 is disposed between two adjacent sub-pixels 22, and since the space between two adjacent sub-pixels 22 is limited, that is, the area requirement on the photo sensors 23 disposed between two adjacent sub-pixels 22 cannot be too large, the photo sensors 23 in the same photo sensor group (that is, all the photo sensors 23 included in the same photo sensor group) are connected in parallel, so as to sum up the photo sensing signals (for example, currents) output by the multiple photo sensors 23 belonging to the same photo sensor group, thereby avoiding the problem that the intensity value of the photo sensing signal output by the photo sensor 23 cannot meet the monitoring requirement due to the insufficient area of the photo sensors 23.
It is understood that the area of the photo sensors 23, the number of the photo sensors 23 included in the photo sensor group (i.e., the number of the photo sensors 23 connected in parallel), and the performance of the photo sensors 23 are related to each other. For example, the higher the External Quantum Efficiency (EQE) of the photosensor 23, the smaller the total area corresponding to the photosensor 23 may be, and/or the fewer the number of photosensors 23 connected in parallel may be.
In an embodiment, as shown in fig. 2, the photo sensors 23 may also be arranged in rows and columns (for example, the photo sensors 23 may be arranged in rows and columns on the photo sensing area 21A-1), each photo sensor group may be a row or a column of photo sensors 23, and the photo sensors 23 may be located between two adjacent sub-pixels 22 arranged in the same column. Specifically, as shown in fig. 2, on the photosensitive area 21A-1 of the substrate 21, the photo sensors 23 may be disposed between any two adjacent sub-pixels 22 arranged in the same column, the number of columns corresponding to the photo sensors 23 is the same as the number of columns of the sub-pixels 22, for example, 3 to 6 columns, and meanwhile, the number of rows of the photo sensors 23 is the same as the number of rows of the sub-pixels 22, for example, 8 to 10 rows. Moreover, it can be understood that the number of columns and the number of rows of the optical sensors 23 should be appropriate, and under the condition that the accumulated value of the intensities of the light sensing signals output by the optical sensors 23 connected in parallel meets the monitoring requirement, the number of columns and the number of rows of the optical sensors 23 may be as small as possible, so as to avoid the problem that the distances between the optical sensors 23 connected in parallel are large, so that the light collected by each other has obvious differences, and further the accuracy of monitoring the ambient light intensity is reduced.
In the above embodiment, the material of the substrate 21 may be glass or a hard resin, or may be one of organic polymers such as a polyimide, polycarbonate, polyethylene terephthalate, and polyether sulfone substrate. The light sensor 23 is used for collecting ambient light incident through the display panel 20, specifically, the light sensor 23 may be any device capable of sensing light energy and converting the light energy into an electrical signal, and the light sensor 23 may be classified into four types, namely an ambient light sensor, an infrared light sensor, a solar light sensor and an ultraviolet light sensor, according to the type of light energy that the light sensor can sense.
Specifically, the optical sensor 23 may include a photosensitive layer, which can generate a photoelectric effect when sensing a light signal (e.g., visible light), and the material of the photosensitive layer may be a silicon-rich compound such as silicon-rich silicon oxide, silicon-rich silicon nitride, silicon-rich silicon oxynitride, and the like. Further, the optical sensor 23 may further include an input end and an output end disposed at two sides of the photosensitive layer, wherein the input end and the output end may be made of transparent conductive materials such as indium tin oxide, so that the light signal can enter the photosensitive layer of the optical sensor 23 through the input end and the output end of the optical sensor 23.
In this embodiment, the sub-pixel 22 may be a red sub-pixel (R), a green sub-pixel (G), a blue sub-pixel (B), or a white sub-pixel (W), and the four sub-pixels 22 are respectively used for displaying red, green, blue, and white. In some embodiments, as shown in fig. 3, the display panel 20 may only include a red sub-pixel (R), a green sub-pixel (G), and a blue sub-pixel (B), and each pixel point in the display panel 20 is composed of sub-pixels 22 of three colors of R/G/B. In other embodiments, the display panel 20 may further include a red sub-pixel (R), a green sub-pixel (G), a blue sub-pixel (B), and a white sub-pixel (W), and each pixel point in the display panel 20 is composed of sub-pixels 22 of four colors of R/G/B/W.
Specifically, as shown in fig. 3, the display panel 20 may further include at least one first signal line (not shown) and at least one second signal line 24A/24B/24C on the substrate 21, wherein the optical sensor 23 connected in parallel in each optical sensor group may be electrically connected to a corresponding one of the first signal lines and a corresponding one of the second signal lines 24A/24B/24C, the first signal line may be electrically connected to the input end of the optical sensor 23 to provide an operating voltage for the optical sensor 23, and the second signal line 24A/24B/24C may be electrically connected to the output end of the optical sensor 23 to read the optical sensing signal output by the optical sensor 23.
In an embodiment, when the number of the photo sensor groups is plural, the photo sensors 23 in different photo sensor groups may be connected to different second signal lines 24A/24B/24C, as shown in fig. 3, the first column of photo sensors 23 from left to right in fig. 3 may be used as a photo sensor group, the photo sensors 23 included in the first column may be connected to the second signal line 24A together, the second column of photo sensors 23 from left to right in fig. 3 may be used as a photo sensor group, the photo sensors 23 included in the second column of photo sensors 23 may be connected to the second signal line 24B together, and the third column of photo sensors 23 from left to right in fig. 3 may be used as a photo sensor group, the photo sensors 23 included in the third column of photo sensors 23 may be connected to the second signal line 24C together. In addition, the subsequent display panel 20 may respectively read the light sensing signals output by each light sensor group through the second signal lines 24A/24B/24C, sum the read light sensing signals to obtain an average value, and then may automatically adjust the brightness of the display panel according to the calculated average value.
Specifically, when the number of the photo sensor groups is multiple, the photo sensors 23 in different photo sensor groups may also be connected to the same first signal line to ensure that the operating voltages obtained by the photo sensors 23 in different photo sensor groups from the first signal line are consistent, so as to reduce the influence of the difference of the operating voltages on the accuracy of the monitoring results of the plurality of photo sensor groups.
In a specific implementation, the first signal line and the second signal line 24A/24B/24C may be both located on the display area 21A (for example, as shown in fig. 3, both located on the photo-sensing area 21A-1 included in the display area 21A) to reduce the interconnection length between the first signal line and the photo-sensor 23 and the second signal line 24A/24B/24C. In other embodiments, the substrate 21 may further include a non-display area (not shown) located at a periphery of the display area 21A, and at least one of the first signal line and the second signal line 24A/24B/24C may be located on the non-display area, so as to prevent the first signal line and the second signal line 24A/24B/24C from occupying an area between two adjacent sub-pixels 22 on the display area 21A of the substrate 21, thereby facilitating the arrangement of the light sensor 23 with a larger area in the area between two adjacent sub-pixels 22 on the display area 21A.
In one embodiment, as shown in fig. 4, the display panel 20 may further include a thin film transistor layer between the substrate 21 and the plurality of sub-pixels 22, and the thin film transistor layer may include a plurality of thin film transistors distributed in an array, and a plurality of scan lines extending in a row direction and a plurality of data lines extending in a column direction. The thin film transistor may include a gate layer 251, a gate insulating layer 252, a source/drain layer 253, and a planarization layer 254, which are sequentially disposed on the substrate 21. The scan line may be disposed in the same layer as the gate layer 251, the data line may be disposed in the same layer as the source/drain layer 253, and the scan line may be located between two adjacent rows of sub-pixels 22, or the scan line may be located between two adjacent rows of sub-pixels 22 and one row of photo sensors 23, the data line may be located between two adjacent rows of sub-pixels 22, and two adjacent gate lines and two adjacent data lines 102 crossing the two adjacent gate lines may jointly define one sub-pixel 22. In some embodiments, the scan line may also be located between a row of adjacent sub-pixels 22 and a row of adjacent photo sensors 23 on the photosensitive area 21A-1 of the substrate 21 to avoid the scan line being located above or below the photo sensors 23 and blocking the photo sensors 23.
Specifically, the display panel 20 may further include a gate driver (not shown) and a data driver (not shown), the gate driver may be electrically connected to the corresponding gate lines, and the data lines may be electrically connected to the data driver. In some embodiments, the display panel 20 may further include a photosensor driver (not shown) electrically connected to the at least one first signal line to output an operating voltage for driving the photosensor 23 to activate to the corresponding photosensor 23 through the first signal line, and it is understood that the driving circuit of the photosensor 23 and the driving circuit of the sub-pixel 22 are independent from each other in this embodiment, so as to realize independent control of turning on or off the photosensor 23.
In one embodiment, the photosensor 23 may be disposed in the same layer as the gate layer 251 or in the same layer as the source/drain layer 253, for example, as shown in fig. 4, the photosensor 23 may be disposed in the same layer as the gate layer 251 and may be formed in the same step. Thus, the working procedure is saved.
In other embodiments, the light sensor 23 may be disposed on the same layer as the gate insulating layer 252 or on the same layer as the planarization layer 254. For example, a groove may be formed on the surface of the gate insulating layer 252 away from the substrate 21, and the corresponding optical sensor 23 may be located in the groove, and in a specific implementation, the optical sensor 23 may be formed in the groove through a deposition process, so that an additional fixing member for the optical sensor 23 is not required, which is beneficial to implementing a light and thin design of the display panel, and further beneficial to reducing the manufacturing cost of the display panel.
It is to be understood that the optical sensor 23 and the first and second signal lines 24A/24B/24C may be disposed in the same layer or in different layers, and when the optical sensor 23 and the first and second signal lines 24A/24B/24C are not disposed in the same layer, the optical sensor 23 and the first and second signal lines 24A/24B/24C may be electrically connected through an interlayer via.
In some embodiments, the display panel 20 may further include a buffer layer 26 between the substrate 21 and the thin-film transistor layer, and accordingly, the light sensor 23 may be disposed on the same layer as the buffer layer 26. The buffer layer 26 may include a silicon nitride layer and a silicon oxide layer sequentially far from the substrate 21, and the buffer layer 26 may enable the thin film transistor layer to be more stably deposited on the substrate 21, thereby facilitating improvement of stability of the display panel.
In some embodiments, as shown in fig. 4, the thin film transistor may include a polysilicon layer 255 and a dielectric layer 256 sequentially disposed on the substrate 21, the polysilicon layer 255 and the dielectric layer 256 being located between the substrate 21 and the gate layer 251. The photo sensor 23 may be disposed in the same layer as the polysilicon layer 255 or in the same layer as the dielectric layer 256.
In the above embodiment, the display panel 20 may further include a light shielding layer (not shown), where the light shielding layer (e.g., a black matrix) covers a region between two adjacent sub-pixels and does not cover the photo sensor 23. Specifically, the display panel 20 may be a liquid crystal display panel or an organic light emitting display panel. Moreover, when the display panel 20 is a liquid crystal display panel, each sub-pixel 22 may include a pixel electrode layer 221 and a color filter layer (not shown) sequentially separated from the substrate 21, and the light shielding layer may be disposed on the same layer as the color filter layer, and may be specifically located between the color filter layers of two adjacent sub-pixels 22. The color filter layer is used to determine the emission color of the corresponding sub-pixel 22, and the light shielding layer does not cover (or shield) the light sensor 23, so that ambient light can be incident on the light sensor 23.
Specifically, the color filter layer may include a red filter layer (R color resist), a green filter layer (G color resist), a blue filter layer (B color resist), and a white filter layer (W color resist). Among them, the red filter layer (R color resistor) may allow red light to pass therethrough, the green filter layer (G color resistor) may allow green light to pass therethrough, the blue filter layer (B color resistor) may allow blue light to pass therethrough, and the white filter layer (W color resistor) may allow white light to pass therethrough. In addition, in a specific implementation, the light-shielding layer may be provided with a through hole to expose the optical sensor 23, so as to prevent the optical sensor 23 from being shielded by the light-shielding layer and being unable to receive ambient light.
In other embodiments, when the display panel 20 is an organic light emitting display panel, the sub-pixels 22 may include a pixel electrode layer 221, a light emitting layer (not shown) and a common electrode layer (not shown) sequentially separated from the substrate 21, the light shielding layer may be disposed in the same layer as the light emitting layer, and may be specifically located between the light emitting layers of two adjacent sub-pixels 22, and the light shielding layer does not cover (or shield) the light sensor 23, so that ambient light can be incident on the light sensor 23.
Specifically, the light emitting layer may include a red light emitting layer, a green light emitting layer, a blue light emitting layer, and a white light emitting layer. Wherein, the red light emitting layer can emit red light, the green light emitting layer can emit green light, the blue light emitting layer can emit blue light, and the white light emitting layer can emit white light. In addition, in a specific implementation, the light-shielding layer may be provided with a through hole to expose the optical sensor 23, so as to prevent the optical sensor 23 from being shielded by the light-shielding layer and being unable to receive ambient light.
In some embodiments, the light sensor 23 may be disposed on the same layer as the pixel electrode layer 221 of the sub-pixel, and may be specifically located between the pixel electrode layers 221 of two adjacent sub-pixels 22. In a specific implementation, the photo sensor 23 and the pixel electrode layer 221 may be formed together in the same process, which is advantageous for saving the process.
Different from the prior art, the display panel of this embodiment, including the base plate that has the display area, and be located a plurality of sub-pixels and at least one optical sensor group on the display area, each optical sensor group includes two at least optical sensors, a plurality of sub-pixels are row column distribution, every optical sensor is located the region between two adjacent sub-pixels on the base plate, the optical sensor in same optical sensor group parallel connection, thereby, make optical sensor no longer need occupy the space in display panel non-display area, be favorable to improving the screen occupation ratio, and realized the accumulation of the photoinduction signal that a plurality of optical sensors output, in order to ensure that the photoinduction signal intensity value that reads to obtain can be big enough, and then can ensure the photoinduction sensitivity of display panel.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. As shown in fig. 5, the display device 50 includes a driving circuit for supplying a driving voltage to the display panel 51 and the display panel 51 of any of the above embodiments.
The display panel 51 includes a substrate having a display area, and a plurality of sub-pixels and at least one photo sensor group located on the display area, each photo sensor group includes at least two photo sensors, the plurality of sub-pixels are distributed in rows and columns, each photo sensor is located in a region between two adjacent sub-pixels on the substrate, and the photo sensors in the same photo sensor group are connected in parallel.
Specifically, the light sensor may collect ambient light incident on the display panel 51 and convert the collected ambient light into an electrical signal (e.g., current). The display panel 51 may further include a controller electrically connected to the optical sensor, and capable of receiving an electrical signal output by the optical sensor and adjusting the light emitting brightness of the display panel 51 according to the electrical signal. The controller may be a Central Processing Unit (CPU), a microprocessor, or the like.
For example, for a specific adjustment mode, when the light sensor detects that the light intensity of the ambient light is greater than a preset light intensity, the light sensor collects the current ambient light and sends an electrical signal, and the controller receives the electrical signal and controls the light-emitting brightness of the display panel 51 to be greater than a preset brightness value according to the electrical signal, so that a user can clearly see the content displayed by the display device 50 in a strong light environment. Or, when the light sensor detects that the light intensity of the ambient light is smaller than the preset light intensity, the light sensor collects the current ambient light and sends an electrical signal, and the controller can receive the electrical signal and control the light emitting brightness of the display panel 51 to be smaller than the preset brightness value according to the electrical signal, so as to improve the contrast of the display panel 51 in the display device 50, and thus, a user can clearly see the content displayed by the display device 50 in a low-light environment.
In some embodiments, the display panel 51 may be a liquid crystal display panel or an organic light emitting display panel, and when the display panel 51 is a liquid crystal display panel, the display device 50 may further include a backlight module located on one side of the substrate back ion pixel and the light sensor, and the light intensity detected by the light sensor in the display device 50 may be from two aspects, namely, the light intensity in the space where the display device 50 is located on the one hand, and the light leakage from the backlight module toward the light sensor on the other hand, that is, the actual ambient light corresponding to the display device 50 is equal to the light intensity detected by the light sensor minus the light leakage from the backlight module toward the light sensor on the other hand. Accordingly, the display device 50 described above can adaptively adjust the emission luminance of the display panel 51 according to the actual ambient light, thereby contributing to reduction of power consumption.
In other embodiments, the display device 50 may further include a light shielding member located between the backlight module and the light sensor, where the light shielding member is used to shield light incident from the backlight module to the light sensor, so as to reduce light leakage interference of the backlight module to the light sensor, and enable the display device 50 to obtain actual ambient light directly according to the intensity of the light detected by the light sensor, thereby helping to ensure the accuracy of detection of the light sensor, and further ensuring the accurate adjustment of the brightness of the display panel 51 by the display device 50.
Different from the prior art, the display device in this embodiment integrates the plurality of optical sensors in the display area of the display panel, and connects the plurality of optical sensors in parallel, so that the display area of the display panel is increased, and simultaneously, accumulation of the light sensing signals output by the plurality of optical sensors is realized, so that even if the optical sensor with a small use area is used, a large light sensing signal intensity value can be read, and further, it can be ensured that the light sensing sensitivity of the display panel is not affected.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A display panel, comprising:
a substrate having a display area;
a plurality of sub-pixels and at least one photosensor group located on the display area, each photosensor group including at least two photosensors;
the plurality of sub-pixels are distributed in rows and columns, each light sensor is located in a region between two adjacent sub-pixels on the substrate, and the light sensors in the same light sensor group are connected in parallel.
2. The display panel according to claim 1, characterized in that the display panel further comprises:
at least one first signal line and at least one second signal line on the substrate; the optical sensors connected in parallel in each optical sensor group are electrically connected with a corresponding one of the first signal lines and a corresponding one of the second signal lines, the first signal lines are used for providing working voltage for the optical sensors, and the second signal lines are used for reading light sensing signals output by the optical sensors.
3. The display panel of claim 1, wherein the photo sensors are arranged in rows and columns, and each photo sensor group corresponds to one row or one column of the photo sensors.
4. The display panel according to claim 1, characterized in that the display panel further comprises:
the thin film transistor layer is positioned between the substrate and the plurality of sub-pixels and comprises a thin film transistor, the thin film transistor comprises a grid layer, a grid insulating layer and a source drain layer which are sequentially arranged on the substrate, and the optical sensor and the grid layer are arranged in the same layer or the source drain layer is arranged in the same layer.
5. The display panel of claim 4, wherein the thin-film transistor layer further comprises a plurality of scan lines extending along a row direction and a plurality of data lines extending along a column direction, the scan lines are disposed in the same layer as the gate layer, the data lines are disposed in the same layer as the source and drain layers, the scan lines are disposed between two adjacent rows of the sub-pixels, and the data lines are disposed between two adjacent columns of the sub-pixels.
6. The display panel according to claim 1, further comprising a light shielding layer covering a region between two adjacent sub-pixels and not covering the light sensor.
7. The display panel according to claim 6, wherein the sub-pixels comprise a pixel electrode layer and a color filter layer which are sequentially away from the substrate, and the light shielding layer is located between the color filter layers of two adjacent sub-pixels.
8. The display panel according to claim 7, wherein the light sensor is disposed on the same layer as the pixel electrode layer.
9. The display panel according to claim 6, wherein the sub-pixels comprise a pixel electrode layer, a light emitting layer and a common electrode layer which are sequentially away from the substrate, and the light shielding layer is located between the light emitting layers of two adjacent sub-pixels.
10. A display device comprising a display panel according to any one of claims 1 to 9 and a driving circuit for supplying a driving voltage to the display panel.
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| CN202110351203.5A CN113093425A (en) | 2021-03-31 | 2021-03-31 | Display panel and display device |
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| CN202110351203.5A CN113093425A (en) | 2021-03-31 | 2021-03-31 | Display panel and display device |
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Application publication date: 20210709 |