CN116386533A - Display panel, brightness control method thereof and display device - Google Patents
Display panel, brightness control method thereof and display device Download PDFInfo
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- CN116386533A CN116386533A CN202310357612.5A CN202310357612A CN116386533A CN 116386533 A CN116386533 A CN 116386533A CN 202310357612 A CN202310357612 A CN 202310357612A CN 116386533 A CN116386533 A CN 116386533A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application provides a display panel, a brightness control method thereof and a display device. The display panel comprises a display area and a non-display area which is arranged around the display area, wherein an acquisition data line, a frame control signal line and a plurality of photosensitive units are arranged in the non-display area. Each photosensitive unit comprises a photosensitive module and a switch module. The photosensitive module is used for sensing the brightness of the environment light to obtain a detection signal. The switch module comprises a first connecting end, a second connecting end and a control end, wherein the first connecting end is electrically connected with the acquisition data line, the second connecting end is electrically connected with the photosensitive module, and the control end is electrically connected with the frame control signal line. The switch module is conducted in response to the frame control signal transmitted by the frame control signal line, so that the detection signal output by the photosensitive module is transmitted to the acquisition data line, and the detection signal is output through the acquisition data line. The display panel provided by the application multiplexes the internal part of the circuit structure and the control signal to collect the ambient light brightness, and the equipment structure can be simplified.
Description
Technical Field
The present disclosure relates to the field of display panels, and particularly to a display panel, a brightness control method thereof, and a display device.
Background
Currently, the mainstream display technologies are LCD (Liquid Crystal Display ) technology and OLED (Organic Light-Emitting Diode) technology, in which display brightness has an important effect on the display effect of the display device, so in order to provide a comfortable use experience, some of the existing display devices have a brightness automatic adjustment function. However, in the existing display device, a photosensor is generally disposed outside the display panel to detect the intensity of ambient light, and the structure is complex and the manufacturing cost is high.
Disclosure of Invention
In view of this, the main purpose of the present application is to provide a display panel, a brightness control method thereof, and a display device, which are aimed at solving the problems of complex structure and high manufacturing cost of the existing display device that the photosensor is disposed outside the display panel.
To achieve the above object, a first aspect of the present application provides a display panel, which includes a display area and a non-display area surrounding the display area, wherein an acquisition data line, a frame control signal line and a plurality of photosensitive units are disposed in the non-display area. Each photosensitive unit comprises a photosensitive module and a switch module. The photosensitive module is used for sensing the brightness of the environment light to obtain a detection signal. The switch module comprises a first connecting end, a second connecting end and a control end, wherein the first connecting end is electrically connected with the acquisition data line, the second connecting end is electrically connected with the photosensitive module, and the control end is electrically connected with the frame control signal line. The switch module is conducted in response to the frame control signal transmitted by the frame control signal line, so that the detection signal output by the photosensitive module is transmitted to the acquisition data line, and the detection signal is output through the acquisition data line.
The display panel provided by the embodiment of the application is characterized in that the acquisition data line, the frame control signal line, the photosensitive module and the switch module are arranged in the non-display area, and the switch module is conducted in response to the frame control signal transmitted by the frame control signal line, so that the detection signal output by the photosensitive module is transmitted to the acquisition data line, and the detection signal is output by the acquisition data line.
Optionally, the display panel further includes a control module, the control module is electrically connected with the acquisition data line, and the control module is configured to obtain a detection signal output by the acquisition data line, and adjust display brightness of the display panel according to the detection signal output by the acquisition data line.
Optionally, the frame control signal line is a frame start signal line or a frame end signal line.
Optionally, a plurality of rows of sub-pixel units are disposed in the display area, the plurality of photosensitive units are arranged along the row direction and are close to the edge of the display area, and the number of the plurality of photosensitive units is equal to the number of the sub-pixel units in one row.
The second aspect of the present application also provides a brightness control method of a display panel, where the brightness control method is applied to the display panel, and the brightness control method includes: outputting a frame control signal to each photosensitive unit through a frame control signal line, and controlling the switch module in each photosensitive unit to be conducted, so that each photosensitive module transmits a detection signal to an acquisition data line through the conducted switch module, wherein the detection signal is obtained by sensing the ambient light brightness by the photosensitive module; acquiring a detection signal through the acquisition data line; and adjusting the display brightness of the display panel according to the detection signal.
Optionally, the acquiring the detection signal through the acquisition data line includes: and acquiring detection signals through the acquisition data line according to a preset frequency.
Optionally, the adjusting the display brightness of the display panel according to the detection signal includes: determining a target brightness parameter corresponding to the detection signal according to the detection signal and a preset brightness parameter mapping table; wherein, the preset brightness parameter mapping table records the mapping relation between a plurality of detection signal values and a plurality of target brightness parameters; and adjusting the display panel to display brightness corresponding to the target brightness parameter.
Optionally, before determining the target brightness parameter corresponding to the detection signal according to the detection signal and a preset brightness parameter mapping table, the brightness control method further includes: and judging whether the time interval between the last time of executing the brightness adjustment step and the current time is larger than or equal to a preset time interval. The determining, according to the detection signal and a preset brightness parameter mapping table, a target brightness parameter corresponding to the detection signal includes: if the time interval between the last execution of the brightness adjustment step and the current time is greater than or equal to the preset time interval, determining a target brightness parameter corresponding to the detection signal according to the detection signal and a preset brightness parameter mapping table; and if the time interval between the last time of executing the brightness adjustment step and the current time is smaller than the preset time interval, controlling the display panel to keep the current display brightness.
Optionally, the frame control signal line is a frame start signal line; the frame control signal is output to each photosensitive unit through the frame control signal line, and the switch module in each photosensitive unit is controlled to be conducted, so that each photosensitive module transmits detection signals to the acquisition data line through the conducted switch module, and the frame control signal line comprises: when each frame starts, a frame control signal is output to each photosensitive unit through a frame start signal line, and the switch modules in each photosensitive unit are controlled to be conducted, so that each photosensitive module transmits a detection signal to the acquisition data line through the conducted switch modules.
The third aspect of the present application also provides a display device, which includes a housing, a power module, and the display panel described above; the power supply module is electrically connected with the display panel and is used for providing working power supply for the array substrate; the shell is used for fixing the display panel and the power supply module.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
FIG. 1 is a schematic diagram of a conventional display panel;
FIG. 2 is a timing chart of driving signals of the display panel shown in FIG. 1;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 4 is a graph showing the relationship between the current output by the photosensitive module in FIG. 3 and the ambient light;
fig. 5 is a flowchart of a brightness control method of a display panel according to an embodiment of the present application;
FIG. 6 is a detailed flow chart of step 630 in FIG. 5;
FIG. 7 is a detailed flow chart of step 633 of FIG. 6;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.
The reference numerals are explained as follows:
Non-display area 12
Frame control signal line 122
Sub-pixel unit P
Virtual pixel unit DP
Virtual data line DD
Photosensitive module 1211
Switch module 1212
Binding portion 13
Display device 1
Frame start signal line STV
Frame termination signal line RST
Clock signal line CLK
First non-display sub-area 1201
Second non-display sub-region 1202
The following detailed description will further illustrate the application in conjunction with the above-described figures.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without undue burden, are within the scope of the present application.
In the description of the present application, it should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a conventional display panel 100'. The display panel 100' includes a display area 11 and a non-display area 12 disposed around the display area 11.
A plurality of data lines 111 extending along a column direction and a plurality of scan lines (not shown) extending along a row direction are disposed in the display area 11, and the plurality of data lines 111 and the plurality of scan lines intersect to define a plurality of sub-pixel units P, and each data line 111 is electrically connected to a column of sub-pixel units P.
The non-display area 12 is mainly used for routing circuit wires, and coating a Seal adhesive (Seal) to Seal the liquid crystal box to prevent liquid crystal from overflowing and water vapor from invading, maintain the peripheral thickness of the liquid crystal box, and adhere the array substrate and the color film substrate. Specifically, the GDL (Gate drive less) circuits and GDL traces of the display panel 100' are disposed in the non-display area 12 (i.e., the first non-display sub-area 1201 and the second non-display sub-area 1202) on the left and right sides of the display area 11, and include, for example, a frame start signal line STV, a frame end signal line RST and a clock signal line CLK disposed under a Black Matrix (BM). As shown in fig. 2, the frame start signal line STV is used to output a frame start signal STV at the start of each frame to activate the GDL circuit. The clock signal line CLK is used for outputting a plurality of clock signals (e.g., CLK1 to CLK 8) to control the start GDL circuit to sequentially output a plurality of scan signals to the plurality of scan lines, and to scan the plurality of rows of sub-pixel units P line by line. The frame termination signal line RST is for outputting a frame termination signal RST at the end of each frame to control the GDL circuit to stop outputting a scan signal. Further, the input ends of the GDL traces are all disposed On the binding portion 13, and a Chip On Film (COF) is further disposed On the binding portion 13, where the Chip On Film is a die-soft Film packaging technology for fixing a circuit (IC) On a flexible circuit board, and the Chip is combined with a flexible substrate circuit by using a flexible additional circuit board as a carrier for packaging the Chip, or a single-finger non-packaged Chip.
In the display area 11, a coupling capacitance exists between adjacent data lines 111, and thus, a data signal transmitted in the data line 111 may be affected by the coupling capacitance. It can be understood that the data lines 111 are uniformly distributed on the left and right sides of each data line 111 in the middle of the display area 11, that is, coupling capacitors exist between each data line 111 in the middle of the display area 11 and the data lines 111 on the left and right sides, in contrast, only one data line 111 is on the side of the two data lines 111 on the left and right sides of the display area 11, for example, the data line 111 on the right side of the display area 11 shown in fig. 1 is only one data line 111 on the left side, and no data line 111 is on the right side, that is, coupling capacitors exist between the two data lines 111 on the left and right sides of the display area 11 and one data line 111. Then, the influence of the coupling capacitance on the two data lines 111 at the left and right edges of the display area 11 is inconsistent with the influence of the coupling capacitance on the data lines 111 at the middle, so that the stability of the data signals transmitted by the two data lines 111 at the left and right edges of the display area 11 is affected.
In order to keep the coupling capacitances of the two data lines 111 at the left and right edges of the display area 11 substantially consistent with the coupling capacitances of the data lines 111 in the middle, a virtual data line DD and a row of virtual pixel units DP (dummy pixel) are respectively disposed in the non-display areas 12 (i.e., the first non-display sub-area 1201 and the second non-display sub-area 1202) at the left and right sides of the display area 11 of the conventional display panel 100'. The dummy pixel unit DP is connected to the dummy data signal output by the dummy data line DD, so that the coupling capacitances of the two data lines 111 at the left and right edges of the display area 11 and the coupling capacitances of the data lines 111 in the middle can be substantially kept consistent, thereby improving the stability of the data signal transmitted by the two data lines 111 at the left and right edges of the display area 11.
In addition, the conventional display panel 100' is generally provided with a photosensor on the outside to detect the intensity of ambient light to realize an automatic brightness adjustment function, and has a complex structure and high manufacturing cost.
In view of this, referring to fig. 2, an embodiment of the present application provides a display panel 100, where the display panel 100 includes a display area 11 and a non-display area 12 disposed around the display area 11, and an acquisition data line 123, a frame control signal line 122, and a plurality of photosensitive units 121 are disposed in the non-display area 12.
Each of the photosensitive units 121 includes a photosensitive module 1211 and a switching module 1212. The photosensitive module 1211 is used for sensing the brightness of the ambient light to obtain a detection signal.
The switch module 1212 includes a first connection terminal electrically connected to the acquisition data line 123, a second connection terminal electrically connected to the photosensitive module 1211, and a control terminal electrically connected to the frame control signal line 122. Wherein the switching module 1212 is turned on in response to the frame control signal transmitted from the frame control signal line 122, thereby transmitting the detection signal output from the photosensitive module 1211 to the acquisition data line 123 to output the detection signal through the acquisition data line 123. The detection signal can reflect the ambient light brightness, so that the display panel 100 can adjust the display brightness according to the ambient light brightness.
According to the display panel 100 provided by the embodiment of the application, the acquisition data line 123, the frame control signal line 122, the photosensitive module 1211 and the switch module 1212 are arranged in the non-display area 12, and the switch module 1212 is conducted in response to the frame control signal transmitted by the frame control signal line 122, so that the detection signal output by the photosensitive module 1211 is transmitted to the acquisition data line 123, and the detection signal is output through the acquisition data line 123, so that the partial circuit structure and the control signal inside the display panel 100 are multiplexed, the acquisition of the ambient light brightness is realized, the utilization rate of elements can be improved, and the equipment structure can be simplified.
Further, the display panel 100 further includes a control module 14 electrically connected to the collection data line 123, where the control module 14 is configured to obtain a detection signal output by the collection data line 123, and adjust the display brightness of the display panel 100 according to the detection signal output by the collection data line 123.
Further, the type of the light-opening module 1212 includes a thin film transistor (Thin Film Transistor, TFT). The light-opening module 1212 may employ an amorphous silicon thin film transistor (a-Si TFT), or a low temperature polysilicon thin film transistor (LTPS TFT), or an Oxide semiconductor thin film transistor (Oxide TFT), for example. The first connection end, the second connection end and the control end of the light-on module 1212 respectively correspond to the source electrode, the drain electrode and the gate electrode of the thin film transistor. The detection signal transmitted by the photosensitive module 1211 to the collection data line 123 through the on-state switching module 1212 is a current signal. As shown in fig. 4, the photosensitive module 1211 outputs different currents according to the brightness of the ambient light. Wherein, the current value of the current signal output by the collection data line 123 to the control module 14 is the sum of the current value of the current signal transmitted by each photosensitive unit 121 to the collection data line 123.
Optionally, the display panel 100 further includes an acquisition module (not shown) electrically connected between the acquisition data line 123 and the control module 14, where the acquisition module is configured to acquire a current signal transmitted by the acquisition data line and output the current signal to the control module 14.
The display panel 100 may be an LCD (LiquidCrystal Display ) for example. As shown in fig. 3, the frame control signal line 122 may be a frame start signal line STV, so that the frame start signal line STV and the frame start signal STV may be multiplexed, and no additional wiring and signal generating circuit are required, so that the utilization rate of the device may be improved. And, multiplexing the frame start signal STV to control the photosensitive unit 121 to detect the ambient light brightness, so that the detection can be performed once per frame of picture, and the power consumption can be reduced. Of course, in other embodiments, the frame control signal line 122 may also be the frame termination signal line RST. In other embodiments, the display panel 100 may be an OLED (Organic Light-Emitting Diode) display screen, and the frame control signal line 122 may be a start signal line or a reset signal line of a driving circuit in the OLED display screen.
Further, the layout positions of the plurality of photosensitive modules 1211 are the same as the layout positions of at least part of the dummy pixel units DP of the display panel 100 'in fig. 1, that is, at least part of the dummy pixel units DP in the existing display panel 100' are replaced by photosensitive materials and exposed to ambient light, so that the plurality of photosensitive modules 1211 can be obtained, one switch module 1212 is correspondingly arranged for each photosensitive module 1211, and the second connection end of the switch module 1212 is electrically connected with the photosensitive module 1211, so that the plurality of photosensitive units 121 can be obtained. The collection data line 123 may be a virtual data line DD in the existing display panel 100', so no additional wiring is required. The collecting data line 123 is disposed near the edge of the display area 11, and preferably, the distance between the collecting data line 123 and the adjacent data line 111 is equal to the distance between two adjacent data lines 111 in the display area 11.
Further, the non-display area 12 comprises a first non-display sub-area 1201 and a second non-display sub-area 1202 extending in the column direction and located on opposite sides of the display area 11.
In an embodiment, the photosensitive cells 121 may be disposed only in the first non-display sub-area 1201 or the second non-display sub-area 1202, that is, at least part of the dummy pixel cells DP in the first non-display sub-area 1201 or the second non-display sub-area 1202 of the existing display panel 100' are replaced with photosensitive material and exposed to ambient light, so as to form the plurality of photosensitive cells 121. Illustratively, the number of the plurality of photosensitive cells 121 is equal to the number of the sub-pixel cells P in a column, and the plurality of photosensitive cells 121 are arranged in the column direction and are located between the acquisition data line 123 and the frame control signal line 122. Preferably, the distance between any two adjacent photosensitive units 121 is approximately equal to the distance between two adjacent sub-pixel units P in the column direction of the display area 11, that is, the photosensitive units 121 are approximately aligned with the sub-pixel units P, so that the stability of the frame control signal transmitted by the frame control signal line 122 can be improved.
In another embodiment, the photosensitive units 121, one of the frame control signal lines 122, and one of the collection data lines 123 may be disposed in each of the first non-display sub-area 1201 and the second non-display sub-area 1202, that is, all the dummy pixel units DP in the existing display panel 100' are replaced by photosensitive materials and exposed to ambient light, so as to form the plurality of photosensitive units 121, that is, the number of photosensitive units 121 in each of the first non-display sub-area 1201 and the second non-display sub-area 1202 is equal to the number of sub-pixel units P in one column, and the photosensitive units 121 in the same non-display sub-area are arranged along the column direction and between the collection data lines 123 and the frame control signal lines 122. In this way, the coupling capacitances of the two data lines 111 at the left and right edges of the display area 11 can be substantially consistent with the coupling capacitances of the data lines 111 in the middle, so that the stability of the data signals transmitted by the two data lines 111 at the left and right edges of the display area 11 can be improved.
Referring to fig. 5, the present application further provides a brightness control method of a display panel, which is applied to the display panel 100 according to any one of the above embodiments, and specifically includes the following steps:
in step 610, a frame control signal is output to each photosensitive unit 121 through the frame control signal line 122 to control the switch module 1212 in each photosensitive unit 121 to be turned on, so that each photosensitive module 1211 transmits a detection signal to the acquisition data line 123 through the turned-on switch module 1212. Wherein the detection signal is obtained by sensing the ambient light level by the photosensitive module 1211.
In step 620, a detection signal is acquired through the acquisition data line 123.
Optionally, in one embodiment, the frame control signal line 122 is a frame start signal line. The step 610 specifically includes: at the beginning of each frame, a frame control signal is output to each photosensitive unit 121 through a frame start signal line, and the switch module 1212 in each photosensitive unit 121 is controlled to be turned on, so that each photosensitive module 1211 transmits a detection signal to the acquisition data line 123 through the turned-on switch module 1212. Therefore, the frame start signal line STV and the frame start signal STV can be multiplexed, and no additional wiring or signal generating circuit is required, so that the utilization rate of the element can be improved. And, multiplexing the frame start signal STV to control the photosensitive unit 121 to detect the ambient light brightness, so that the detection can be performed once per frame of picture, and the power consumption can be reduced. Of course, in other embodiments, the frame control signal line 122 may also be the frame termination signal line RST.
Optionally, in one embodiment, the step 620 specifically includes: according to a preset frequency, a detection signal is acquired through the acquisition data line 123. The preset frequency is illustratively obtained once for 1-2 s. It can be appreciated that in practical applications, the frequency of change in ambient light brightness is very low compared to the switching frequency of the picture frames. In the display process, each time a frame of picture is displayed, the acquisition data line 123 outputs a detection signal, and if each detection signal is processed, the operation amount is definitely increased, so that the detection data is acquired according to the preset frequency, and the power consumption can be saved.
Further, referring to fig. 6, the step 630 specifically includes:
in step 631, it is determined whether the time interval between the time when the brightness adjustment step was last performed and the current time is greater than or equal to a preset time interval. If the time interval between the last time the brightness adjustment step was performed and the current time is greater than or equal to the preset time interval, step 632 is performed. If the time interval between the last time the brightness adjustment step was performed and the current time is less than the preset time interval, step 634 is performed.
In step 634, the display panel 100 is controlled to maintain the current display brightness.
For example, the preset time interval may be 10s, so that the display panel 100 can be prevented from frequently adjusting the brightness to cause the display screen to suddenly turn on or off, and the visual experience of the user can be improved.
Further, referring to fig. 7, the step 633 specifically includes:
step 6332, determining whether a difference between the target brightness parameter and the current display brightness parameter is greater than a preset difference. If the difference between the target brightness parameter and the current display brightness parameter is greater than the preset difference, step 6333 is performed. If the difference between the target brightness parameter and the current display brightness parameter is less than or equal to the preset difference, step 634 is performed. The luminance parameter may be a luminance percentage, and the preset difference may be 10% by way of example. Thus, when the change of the ambient light brightness is small, the human eyes cannot feel the change of the brightness, and the brightness can not be adjusted, so that the power consumption can be reduced.
According to the brightness control method of the display panel, the frame control signal is output to each photosensitive unit 121 through the frame control signal line 123, the switch module 1212 in each photosensitive unit 121 is controlled to be conducted, so that each photosensitive module 1211 transmits a detection signal to the acquisition data line 123 through the conducted switch module 1212, the detection signal is acquired through the acquisition data line 123, and the display brightness of the display panel 100 is adjusted according to the detection signal, and therefore, the frame control signal in the display panel 100 is multiplexed, the acquisition of the ambient brightness is realized, the utilization rate of elements can be improved, and the equipment structure can be simplified.
Referring to fig. 8, based on the same inventive concept, the present application further provides a display device 1, where the display device 1 includes the display panel 100, the housing 200, and the power module 300 according to any of the above embodiments. The display panel 100 is electrically connected to the power module 300. The power module 300 is configured to provide a working power for the array substrate 100. The housing 200 is used for fixing the display panel 100 and the power module 300.
The displayed device 1 may be, for example, any product with a display function such as a notebook computer, a display, a television, a mobile phone, a tablet computer, etc.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The display panel comprises a display area and a non-display area arranged around the display area, and is characterized in that an acquisition data line, a frame control signal line and a plurality of photosensitive units are arranged in the non-display area;
wherein each photosensitive unit includes:
the photosensitive module is used for sensing the brightness of the environment light to obtain a detection signal; and
the switch module comprises a first connecting end, a second connecting end and a control end, wherein the first connecting end is electrically connected with the acquisition data line, the second connecting end is electrically connected with the photosensitive module, and the control end is electrically connected with the frame control signal line; the switch module is conducted in response to the frame control signal transmitted by the frame control signal line, so that the detection signal output by the photosensitive module is transmitted to the acquisition data line, and the detection signal is output through the acquisition data line.
2. The display panel of claim 1, wherein the display panel further comprises:
the control module is electrically connected with the acquisition data line and is used for acquiring detection signals output by the acquisition data line and adjusting the display brightness of the display panel according to the detection signals output by the acquisition data line.
3. The display panel according to claim 1 or 2, wherein the frame control signal line is a frame start signal line or a frame end signal line.
4. The display panel of claim 1, wherein a plurality of rows of sub-pixel units are disposed in the display area, the plurality of light sensing units are arranged along the row direction and are disposed near the edge of the display area, and the number of the plurality of light sensing units is equal to the number of the sub-pixel units in one row.
5. A luminance control method of a display panel, applied to the display panel according to any one of claims 1 to 4, characterized by comprising:
outputting frame control signals to each photosensitive unit through the frame control signal lines, and controlling the switch modules in each photosensitive unit to be conducted, so that each photosensitive module transmits detection signals to the acquisition data line through the conducted switch modules; wherein the detection signal is obtained by sensing the ambient light brightness by the photosensitive module;
acquiring a detection signal through the acquisition data line; and
and adjusting the display brightness of the display panel according to the detection signal.
6. The method for controlling brightness of a display panel according to claim 5, wherein the acquiring the detection signal through the acquisition data line comprises:
and acquiring detection signals through the acquisition data line according to a preset frequency.
7. The method of controlling brightness of a display panel according to claim 5, wherein adjusting the display brightness of the display panel according to the detection signal comprises:
determining a target brightness parameter corresponding to the detection signal according to the detection signal and a preset brightness parameter mapping table; wherein, the preset brightness parameter mapping table records the mapping relation between a plurality of detection signal values and a plurality of target brightness parameters; and
and adjusting the display panel to display brightness corresponding to the target brightness parameter.
8. The method for controlling brightness of a display panel according to claim 7, wherein before determining the target brightness parameter corresponding to the detection signal according to the detection signal and a preset brightness parameter mapping table, the method further comprises:
judging whether the time interval between the last time of executing the brightness adjustment step and the current time is greater than or equal to a preset time interval;
the determining, according to the detection signal and a preset brightness parameter mapping table, a target brightness parameter corresponding to the detection signal includes:
if the time interval between the last execution of the brightness adjustment step and the current time is greater than or equal to the preset time interval, determining a target brightness parameter corresponding to the detection signal according to the detection signal and a preset brightness parameter mapping table; and
and if the time interval from the last execution of the brightness adjustment step to the current time is smaller than the preset time interval, controlling the display panel to keep the current display brightness.
9. The method of controlling brightness of a display panel according to claim 5, wherein the frame control signal line is a frame start signal line; the frame control signal is output to each photosensitive unit through the frame control signal line, and the switch module in each photosensitive unit is controlled to be conducted, so that each photosensitive module transmits detection signals to the acquisition data line through the conducted switch module, and the frame control signal line comprises:
when each frame starts, a frame control signal is output to each photosensitive unit through a frame start signal line, and the switch modules in each photosensitive unit are controlled to be conducted, so that each photosensitive module transmits a detection signal to the acquisition data line through the conducted switch modules.
10. A display device, comprising:
a housing;
a power module; and
the display panel of any one of claims 1-4, electrically connected to the power module; the power supply module is used for providing a working power supply for the array substrate; the shell is used for fixing the display panel and the power supply module.
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