Display device and driving method thereof

Abstract

The present application discloses a display device and a driving method thereof, wherein the display panel includes a plurality of drive switches and an electrochromic layer, wherein the electrochromic layer is provided on at least a portion of the drive switches; the drive circuit includes a control module, a switching module, and a dimming module; the control module controls the drive switch to enter a drive phase or a photosensitive phase, and the switching module controls the light transmittance of the electrochromic layer according to the phase of the drive switch; when the drive switch enters the drive phase, the drive switch drives the corresponding pixel, and the switching module switches the electrochromic layer to an opaque state; when the drive switch enters the photosensitive phase, the switching module switches the electrochromic layer to at least a partially transparent state, corresponding to the drive switch receiving external ambient light. Through the above design, the problem of a reduced display aperture ratio due to the presence of an ambient light sensor can be avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a driving method thereof. Background Art

[0002] As people become more and more dependent on mobile terminals, in order to ensure that users adapt to the brightness of the mobile terminal screen, when the ambient light becomes brighter, the mobile terminal will adjust the screen brightness accordingly; when the ambient light becomes darker, the mobile terminal will adjust the screen brightness accordingly.

[0003] Currently, mobile devices typically incorporate built-in ambient light sensors that detect the brightness of the surrounding light and automatically adjust the screen brightness. However, these sensors not only take up space on the device but also reduce the screen-to-body ratio, affecting the aperture ratio. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a display device and a driving method thereof, so as to avoid the problem that the presence of an ambient light sensor causes a reduction in the display aperture ratio.

[0005] The embodiment of the present application discloses a display device, which includes a display panel and a driving circuit for driving the display panel. The display panel includes multiple data lines and multiple scan lines, and the multiple data lines and multiple scan lines are divided into multiple pixel areas. The display panel includes multiple driving switches and an electrochromic layer. The multiple driving switches are arranged one by one in the corresponding pixel areas and connected to the corresponding data lines and scan lines; the electrochromic layer is arranged on at least some of the driving switches to control the amount of received light corresponding to the driving switches; the driving circuit includes a control module, a switching module and a dimming module. The control module is connected to the driving switch to control the driving switch to enter a driving stage or Sensing stage; the switching module is connected to the electrochromic layer and the control module, and controls the light transmittance of the electrochromic layer according to the stage of the driving switch; the dimming module is connected to the driving switch, and adjusts the data signal output to the data line according to the current signal output by the driving switch in the sensing stage; wherein, when the driving switch enters the driving stage, the driving switch receives the data signal and drives the corresponding pixel, and the switching module switches the electrochromic layer to an opaque state; when the driving switch enters the sensing stage, the driving switch receives the blank signal, and the switching module switches the electrochromic layer to an at least partially transparent state, corresponding to the driving switch receiving external ambient light.

[0006] Optionally, the driving circuit includes a gate driving circuit and a source driving circuit, the gate driving circuit is connected to the scan line, and the source driving circuit is respectively connected to the data line, the control module and the dimming module; when the driving switch enters the driving stage, the gate driving circuit outputs a scanning signal to the scan line, and the source driving circuit outputs a data signal to the data line; when the driving switch enters the photosensitive stage, the gate driving circuit outputs a scanning signal to the scan line, and the source driving circuit outputs a blank signal to the data line.

[0007] Optionally, the electrochromic layer includes a plurality of electrochromic strips, the length direction of the electrochromic strips is the same as the length direction of the scanning line, and each of the electrochromic strips covers a row of the driving switches; and the switching module is integrated in the gate driving circuit.

[0008] Optionally, the gate drive circuit includes multiple gate drive units, the switching module includes multiple switching units, each of the switching units drives the corresponding electrochromic strip, and the switching units are integrated one-to-one in the gate drive unit. When the gate drive unit outputs a scanning signal to the corresponding row scan line, the switching unit simultaneously outputs a switching signal to the electrochromic strip in the same row to control the light transmittance of the electrochromic strip.

[0009] Optionally, the electrochromic layer includes a plurality of electrochromic strips, the length direction of the electrochromic strips is the same as the length direction of the data lines, and each of the electrochromic strips covers a column of the driving switches.

[0010] Optionally, the multiple electrochromic strips include a first electrochromic strip and a second electrochromic strip. When the driving switch enters the photosensitivity stage, the switching module switches the first electrochromic strip to a fully transparent state, and the switching module switches the second electrochromic strip to an opaque state; the dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch under the first electrochromic strip and the current signal output by the driving switch under the second electrochromic strip.

[0011] Optionally, the first electrochromic strip and the second electrochromic strip are arranged adjacent to each other.

[0012] Optionally, the multiple electrochromic strips include a first electrochromic strip, a second electrochromic strip and a third electrochromic strip. When the driving switch enters the photosensitivity stage, the switching module switches the first electrochromic strip to a fully transparent state, the switching module switches the second electrochromic strip to an opaque state, and the switching module switches the third electrochromic strip to a translucent state; the dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch under the first electrochromic strip, the current signal output by the driving switch under the second electrochromic strip and the current signal output by the driving switch under the third electrochromic strip.

[0013] Optionally, the light-sensing stage is located in a blank stage between two adjacent frames.

[0014] The present application also discloses a method for driving a display device, which is used to drive the display device described above. The method includes:

[0015] Display step: driving the switch to receive the data signal, driving the corresponding pixel, and the switching module switches the electrochromic layer to an opaque state;

[0016] Detection step: the driving switch receives a blank signal, and the switching module switches the electrochromic layer to at least a partially transparent state;

[0017] Dimming step: The dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch in the detecting step.

[0018] The beneficial effects of the embodiments of the present application are as follows: the embodiments of the present application enable the driving switch to enter the driving stage or the photosensitivity stage through the control module, and control the light transmittance of the electrochromic layer through the switching module, so that when the display panel is displaying normally, the driving switch enters the driving stage, the electrochromic layer switches to an opaque state, the driving switch is not affected by the ambient light, and can drive the corresponding pixels normally; when the display panel needs to detect the ambient light to adjust the screen brightness according to the brightness of the ambient light, the driving switch enters the photosensitivity stage, and the electrochromic layer switches to an at least partially transparent state, so that at least a part of the driving switch can receive the ambient light passing through the electrochromic layer, and the brightness of the ambient light is detected according to the leakage current effect. Finally, the dimming module adjusts the brightness of the display panel according to the detection result of the driving switch on the ambient light in the photosensitivity stage, thereby achieving the effect of adaptive dimming. Through the above-mentioned design, the embodiment of the present application directly reuses the driving switch that originally drives the pixels in the display panel as an ambient light sensor. By adjusting the received signal of the driving switch to switch the state of the driving switch, the driving switch can be used to drive the pixels and detect the ambient light brightness. Therefore, there is no need to add an additional ambient light sensor in the display panel, thereby not reducing the screen-to-body ratio of the display panel and avoiding reducing the aperture ratio of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0020] Figure 1 is a planar schematic diagram of a display device provided in the first embodiment of the present application;

[0021] Figure 2 is a schematic cross-sectional view of a display device provided in the first embodiment of the present application;

[0022] Figure 3 is a planar schematic diagram of another display device provided in the first embodiment of the present application;

[0023] Figure 4 This is a timing diagram provided by the first embodiment of the present application;

[0024] Figure 5 This is a flow chart of a driving method for a display device provided in the first embodiment of the present application;

[0025] Figure 6 is a planar schematic diagram of a display device provided in the second embodiment of the present application;

[0026] Figure 7 is a schematic diagram of an implementation method of the second embodiment of the present application;

[0027] Figure 8 is a schematic diagram of another implementation method in the second embodiment of the present application;

[0028] Figure 9 is a schematic diagram of another implementation method in the second embodiment of the present application;

[0029] Figure 10 It is a plan view of a display device provided in the third embodiment of the present application.

[0030] Among them, 10, display device; 100, display panel; 100A, array substrate; 100B, color film substrate; 110, data line; 120, scan line; 130, drive switch; 140, electrochromic layer; 141, electrochromic strip; 142, first electrochromic strip; 143, second electrochromic strip; 144, third electrochromic strip; 150, pixel electrode; 160, color resistor; 170, black matrix; 171, opening; 180, flat layer; 190, common electrode; 200, drive circuit; 210, control module; 220, switching module; 221, switching unit; 230, dimming module; 240, gate drive circuit; 241, gate drive unit; 250, source drive circuit. DETAILED DESCRIPTION

[0031] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0032] In addition, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense, and may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] like Figure 1As shown, as a first embodiment of the present application, a display device 10 includes a display panel 100 and a driving circuit 200 for driving the display panel 100. The display panel 100 includes a plurality of data lines 110 and a plurality of scan lines 120. The plurality of data lines 110 and the plurality of scan lines 120 divide the display area of ​​the display panel 100 into a plurality of pixel regions arranged in an array. The display panel 100 also includes a plurality of drive switches 130 and an electrochromic layer 140. The plurality of drive switches 130 are disposed one by one within corresponding pixel regions and connected to the corresponding data lines 110 and scan lines 120. The electrochromic layer 140 is disposed on at least some of the drive switches 130 and is used to control the amount of light received by the corresponding drive switches 130.

[0034] It can be understood that “the electrochromic layer 140 is arranged on at least a portion of the driving switches 130” means that the electrochromic layer 140 can cover all the driving switches 130 in the display panel 100, or it can only cover the driving switches 130 of one pixel area, or a row, or a column, or an individual number of driving switches 130.

[0035] It can be understood that “the electrochromic layer 140 is provided on at least a portion of the driving switch 130 for controlling the amount of light received by the corresponding driving switch 130” means that the electrochromic layer 140 can control the amount of light received by the driving switch 130 covered thereunder, and by adjusting the electrochromic layer 140, the driving switch 130 thereunder can receive external ambient light or cannot receive external ambient light.

[0036] Moreover, in the display panel 100, in addition to the newly added electrochromic layer 140 in the embodiment of the present application, other film layer structures, such as a passivation layer, a black matrix, etc., are also provided above the driving switch 130. However, in the embodiment of the present application, if the other structures above the driving switch 130 except the electrochromic layer 140 are transparent structures, there is no need to adjust the structure above the driving switch 130; if there is an opaque structure above the driving switch 130 in addition to the electrochromic layer 140, it is necessary to design an opening in this opaque structure so that the driving switch 130 can receive external light.

[0037] Combine Figure 1 and Figure 2As shown, taking the display panel 100 as a liquid crystal panel as an example, the display panel 100 includes an array substrate 100A and a color filter substrate 100B arranged opposite each other. The drive switch 130, data line 110, and scan line 120 are all arranged on the array substrate 100A. The gate of the drive switch 130 is connected to the scan line 120, the source of the drive switch 130 is connected to the data line 110, and the drain of the drive switch 130 is connected to the pixel electrode 150 on the array substrate 100A. At the same time, the color filter substrate 100B is provided with a color resist 160, a black matrix 170, a planarization layer 180, and a common electrode 190. The black matrix 170 is arranged between adjacent color resists 160, the planarization layer 180 is arranged on the color resist 160 and the black matrix 170, and the common electrode 190 is arranged on the planarization layer 180. The portion where the black matrix 170 overlaps with the drive switch 130 is provided with an opening 171, that is, the portion where the black matrix 170 covers the drive switch 130 is formed as a through hole. As for the electrochromic layer 140 , it can be disposed on either the array substrate 100A or the color filter substrate 100B, which is not limited here.

[0038] Of course, the display panel 100 in the embodiment of the present application can also be an organic light-emitting diode (OLED) display panel or other types of display panels. When an organic light-emitting diode (OLED) display panel is used, each pixel has a control switch in addition to the driving switch 130, or even more other types of switches. However, the control module 210 and the dimming module 230 are still only connected to the driving switch 130, and the electrochromic layer 140 also covers at least part of the driving switch 130.

[0039] In the embodiment of the present application, the drive switch 130 is a thin-film transistor structure, specifically an amorphous silicon thin-film transistor structure. The drive switch 130 not only receives data signals and controls the current transmitted to the pixel electrode to drive the pixel, but also generates a photocurrent when the semiconductor of the drive switch 130 is exposed to light. This photocurrent can be used to detect the ambient light intensity and, in turn, adjust the brightness of the display panel 100, achieving an adaptive dimming effect.

[0040] like Figure 1As shown, in the embodiment of the present application, the driving circuit 200 includes a control module 210, a switching module 220 and a dimming module 230. The control module 210 is connected to the driving switch 130 to control the driving switch 130 to enter the driving stage or the photosensitive stage; the switching module 220 is connected to the electrochromic layer 140 and the control module 210 to control the light transmittance of the electrochromic layer 140 according to the stage of the driving switch 130; the dimming module 230 is connected to the driving switch 130 to control the light transmittance of the electrochromic layer 140 according to the stage of the driving switch 130; The current signal output in the stage adjusts the data signal output to the data line 110; wherein, when the driving switch 130 enters the driving stage, the driving switch 130 receives the data signal, drives the corresponding pixel, and the switching module 220 switches the electrochromic layer 140 to an opaque state; when the driving switch 130 enters the light-sensing stage, the driving switch 130 receives the blank signal, and the switching module 220 switches the electrochromic layer 140 to an at least partially transparent state, so that the driving switch 130 below the electrochromic layer 140 receives external ambient light.

[0041] It can be understood that the source of the driving switch 130 is connected to the data line 110, and the data line 110 provides a data signal for the source of the driving switch 130; the "blank signal" means that the driving switch 130 does not receive the driving signal. When the driving switch 130 enters the photosensitivity stage, the current output by the driving switch 130 is due to the semiconductor of the driving switch 130 being exposed to light; of course, regardless of whether the driving switch 130 is in the driving stage or the photosensitivity stage, the gate of the driving switch 130 will receive the control signal, so that the driving switch 130 is in the on state.

[0042] It can be understood that "the electrochromic layer 140 is switched to at least a partially transparent state" can be understood as, when only a portion of the pixel area, or a portion of the drive switches 130, or an individual drive switch 130 needs to be subjected to ambient light detection, it is only necessary to control the electrochromic layer 140 in the corresponding area above these drive switches 130 to switch to a transparent state; in this case, it is only necessary to divide the electrochromic layer 140 into multiple independent parts so that the electrochromic layers 140 corresponding to the drive switches 130 in different areas can be controlled independently. When it is necessary to perform ambient light detection on all the drive switches 130 in the display area, it is necessary to switch the entire electrochromic layer 140 to a transparent state. In this case, the entire electrochromic layer 140 can be designed as a whole so that the electrochromic layer 140 is controlled as a whole, or the electrochromic layer 140 can be divided into multiple independent parts so that the electrochromic layers 140 corresponding to the drive switches 130 in different areas can be controlled independently.

[0043] Of course, according to actual conditions, the electrochromic layer 140 can also be switched to a semi-transparent state so that only a portion of the ambient light is irradiated onto the drive switch 130 to meet different needs.

[0044] In the embodiment of the present application, the control module 210 enables the driving switch 130 to enter the driving stage or the photosensing stage, and the switching module 220 is used to control the light transmittance of the electrochromic layer 140, so that when the display panel 100 is displaying normally, the driving switch 130 enters the driving stage, and the electrochromic layer 140 switches to an opaque state. The driving switch 130 is not affected by the ambient light and can normally drive the corresponding pixel; when the display panel 100 needs to detect the ambient light to adjust the screen brightness according to the brightness of the ambient light, the driving switch 130 enters the photosensing stage, and the electrochromic layer 140 switches to an at least partially transparent state, so that at least a part of the driving switch 130 can receive the ambient light passing through the electrochromic layer 140, and the brightness of the ambient light is detected according to the leakage current effect. Finally, the dimming module 230 adjusts the brightness of the display panel 100 according to the detection result of the driving switch 130 on the ambient light in the photosensing stage, thereby achieving the effect of adaptive dimming. Through the above-mentioned design, the embodiment of the present application directly reuses the driving switch 130 that originally drives the pixels in the display panel 100 as an ambient light sensor. By adjusting the received signal of the driving switch 130 to switch the state of the driving switch 130, the driving switch 130 can be used to drive the pixels and detect the ambient light brightness. Therefore, there is no need to add an additional ambient light sensor to the display panel 100, thereby not reducing the screen-to-body ratio of the display panel 100 and avoiding reducing the aperture ratio of the display panel 100.

[0045] In this embodiment, the electrochromic layer 140 is a monolithic layered structure that covers all drive switches 130 in the entire display area. At this time, the switching module 220 adjusts the electrochromic layer 140 to the same transparent state everywhere. When the drive switch 130 enters the driving phase, the switching module 220 switches the electrochromic layer 140 as a whole to an opaque state; when the drive switch 130 enters the light-sensing phase, the switching module 220 switches the electrochromic layer 140 as a whole to a transparent state. This design facilitates the control of the electrochromic layer 140. At the same time, when light-sensing detection is required, since the electrochromic layer 140 is switched to a transparent state as a whole, each drive switch 130 can receive ambient light from all directions in front of it, ensuring that the ambient light received by each drive switch 130 is similar or even identical, thereby improving detection accuracy.

[0046] In this embodiment, when light-sensing detection is required, the switching module 220 can control all driving switches 130 in the display area to enter the light-sensing stage, or it can only control part of the driving switches 130 in the display area to enter the light-sensing stage. The specific selection can be made according to actual conditions and is not limited here.

[0047] As a specific implementation method, the dimming module 230 is connected to all the driving switches 130 at the same time. When light detection is required, the switching module 220 controls all the driving switches 130 in the display area to enter the light sensing stage. The dimming module 230 detects the ambient light brightness based on the current output by all the driving switches 130 during light detection. Specifically, the average value of the current output by all the driving switches 130 is used to detect the ambient light brightness, and then the adjustment size of the data current is calculated to avoid the situation where the abnormality of individual driving switches 130 causes abnormal dimming.

[0048] like Figure 3 As shown, in some embodiments, the driving circuit 200 further includes a gate driving circuit 240 and a source driving circuit 250. The gate driving circuit 240 is connected to the scan line 120, and the source driving circuit 250 is respectively connected to the data line 110, the control module 210, and the dimming module 230. When the driving switch 130 enters the driving phase, the gate driving circuit 240 outputs a scanning signal to the scan line 120, and the source driving circuit 250 outputs a data signal to the data line 110. When the driving switch 130 enters the light-sensing phase, the gate driving circuit 240 outputs a scanning signal to the scan line 120, and the source driving circuit 250 outputs a blank signal to the data line 110.

[0049] It can be understood that no matter whether the driving switch 130 enters the driving stage or the photosensing stage, the gate driving circuit 240 outputs a control signal to the gate of the driving switch 130 to turn on the driving switch 130; when the driving switch 130 enters the driving stage, the source driving circuit 250 inputs a data signal to the source of the driving switch 130, so that the driving switch 130 controls the pixel to emit light; when the driving switch 130 enters the photosensing stage, the source driving circuit 250 does not input any signal to the source of the driving switch 130. At this time, the photocurrent generated by the driving switch 130 under the illumination of light is transmitted to the source driving circuit 250 and the dimming module 230 through the original data line 110, so that the dimming module 230 obtains the detection result of the driving switch 130, and then adjusts the subsequent data current size to achieve the purpose of dimming the display panel 100. Through the above design, the embodiment of the present application does not change the connection design between the driving switch 130 and the gate driving circuit 240 and the source driving circuit 250 in the display panel 100. By reusing the data line 110, no additional connection design for the driving switch 130 is added, thereby avoiding the problem of increased connections in the display area leading to a decrease in the display aperture ratio.

[0050] In some embodiments, the dimming module 230 may also be connected to the source or drain of the driving switch 130 by adding a new wiring in the display panel 100 .

[0051] like Figure 4 As shown, during normal display, the display panel 100 has a blank period (b) between two adjacent display frames (a), which can also be understood as a frame interval. Specifically, the clock signal CLK is a waveform signal in display frame a and a low-level signal in blank period (b). The reset signal Reset is a low-level signal in display frame a and a high-level signal in blank period (b). The data signal Source is a low-voltage signal in both display frame a and blank period (b). The electrochromic layer voltage ALS is a low-level signal in display frame a and a high-level signal in blank period (b), thereby switching to a transparent state in blank period (b).

[0052] The embodiment of the present application utilizes this time period, and through the control module 210, the drive switch 130 enters the photosensitive stage during the blank phase and enters the driving stage during the display frame. Since the embodiment of the present application places the photosensitive stage in the blank phase between two adjacent frames, at this time, the gate drive circuit 240 controls the drive switch 130 to open, the source drive circuit 250 stops inputting signals to the drive switch 130, and the switching module 220 switches the electrochromic layer 140 to a transparent state. With this arrangement, there is no need to change the display effect of the picture, and the ambient light brightness can be detected once between every two display frames, achieving the effect of real-time monitoring and real-time adjustment of the brightness of the display panel 100, thereby improving the dimming accuracy and dimming efficiency.

[0053] In other embodiments, the light-sensing stage may also be located within the display frame. Since there are many display frames every second, if only one display frame is changed, the human eye will not notice it, and thus the display effect will not be affected.

[0054] In some embodiments, light detection may be enabled after a certain period of time, such as 1 second or 2 seconds, and light detection does not need to be performed in every frame, thereby reducing the amount of calculation of the display device 10 .

[0055] The embodiment of the present application can also flexibly switch the light-sensing stage to a blank stage or a display frame through the control module 210, so as to improve the adaptability to ambient light while also realizing more diversified light-sensing functions, thereby improving the applicability of the display device 10. For example, in some embodiments, when the ambient light brightness is high, the light-sensing stage can be switched to the blank stage. At this time, since the ambient light has a greater impact on the driving switch 130, switching the light-sensing stage to the blank stage will not affect the normal display of the display panel 100; or, when the ambient light brightness is weak or less obvious, the light-sensing stage is switched to the blank stage. At this time, the display panel 100 does not emit light, and the driving switch 130 is more sensitive to the ambient light detection, thereby improving the detection accuracy; or, when the ambient light changes significantly or more obviously, the light-sensing stage is switched to the display frame, avoiding the detection of ambient light and dimming calculation during the blank stage, thereby saving the power consumption of the display device 10.

[0056] In some embodiments, it is also possible to cache and analyze the video data voltage of a certain time period in the future (application scenario for playing videos), and through pre-caching, data blocking or pure color picture detection and other methods, identify the time when the frame difference is large (between two frames with large differences such as transitions in the video), or the time when the pure black picture is inserted into the photosensitive stage, so that its impact on human perception is reduced to a very small level.

[0057] like Figure 5 As shown, the embodiment of the present application further provides a method for driving a display device, for driving the display device 10 as described above, the driving method comprising:

[0058] Display step: driving the switch to receive the data signal, driving the corresponding pixel, and the switching module switches the electrochromic layer to an opaque state;

[0059] Detection step: the driving switch receives a blank signal, and the switching module switches the electrochromic layer to at least a partially transparent state;

[0060] Dimming step: The dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch in the detecting step.

[0061] The embodiment of the present application saves the screen-to-body ratio of the display panel 100 by driving the switch 130 to be reused as an ambient light sensor, and greatly reduces the user's flicker perception by dynamically inserting the light-sensing stage into the display frame or blank stage, thereby improving the display effect of the panel; compared with the traditional external light sensor solution or the solution of setting a light sensor separately in the panel border area, the technical solution of the present application can reduce the production cost of the display device 10, and also has the advantages of timeliness, precision, and more diversified ambient light intensity detection, and can be more adaptable to the design of multi-scene dimming optimization, greatly improving the market competitiveness of the display device 10 in the present application.

[0062] like Figure 6 As shown, as a display device provided in the second embodiment of the present application, compared to the first embodiment, the electrochromic layer 140 in this embodiment adopts a multiple strip design. Specifically, the electrochromic layer 140 includes multiple electrochromic strips 141. The length direction of the electrochromic strips 141 is the same as the length direction of the scan lines 120. Each electrochromic strip 141 covers a row of the drive switches 130, so that one electrochromic strip 141 controls the light sensitivity of the drive switches 130 in a row. Through this design, the state of each electrochromic strip 141 can be individually controlled to meet more detection requirements. Moreover, the electrochromic strips 141 can also be used for other functional designs. For example, when the width of each electrochromic strip 141 is similar to or equal to the width of a pixel, if a pixel or a row of pixels in the display panel 100 abnormally emits white light, the electrochromic strips 141 above the row of pixels can be adjusted to an opaque state to prevent the pixels in the row from emitting light, thereby achieving a repair effect.

[0063] In some embodiments, the width of the electrochromic strip 141 is smaller than the width of the pixel and is equal to or slightly larger than the width of the driving switch 130. At this time, the electrochromic strip 141 only covers the driving switch 130 and does not cover the excess pixel area, thereby avoiding the problem of light loss caused by more light passing through the electrochromic strip 141.

[0064] In some embodiments, the switching module 220 is integrated into the gate driving circuit 240 to reduce the space occupied by the switching module 220 in the display panel 100 and facilitate circuit design. Of course, in other embodiments, the switching module 220 can also be independently set in the border area of ​​the display panel 100.

[0065] Further, such as Figure 7As shown, the gate driving circuit 240 includes a plurality of gate driving units 241 , and the switching module 220 includes a plurality of switching units 221 . Each of the switching units 221 drives the corresponding electrochromic strip 141 to individually control the light transmittance of each electrochromic strip 141 .

[0066] Furthermore, the switching units 221 are integrated into corresponding gate drive units 241 in a one-to-one correspondence. When the gate drive unit 241 outputs a scan signal to the corresponding row of scan lines 120, the switching unit 221 simultaneously outputs a switching signal to the electrochromic stripes 141 in the same row, thereby controlling the light transmittance of the electrochromic stripes 141. With this design, when the gate drive unit 241 turns on the drive switches 130 in each row, the switching unit 221 also controls the electrochromic stripes 141 in the same row. This allows for simultaneous control of the electrochromic stripes 141, without affecting the normal display of the image.

[0067] like Figure 8 As shown, in some embodiments, the plurality of electrochromic strips 141 include first electrochromic strips 142 and second electrochromic strips 143, that is, one or more electrochromic strips 141 in the electrochromic layer 140 are first electrochromic strips 142, and one or more electrochromic strips 141 are second electrochromic strips 143. When the driving switch 130 enters the light-sensing stage, the switching module 220 switches the first electrochromic strips 142 to a fully transparent state and the switching module 220 switches the second electrochromic strips 143 to an opaque state; the dimming module 230 adjusts the data signal output to the data line 110 based on the current signal output by the driving switch 130 below the first electrochromic strips 142 and the current signal output by the driving switch 130 below the second electrochromic strips 143.

[0068] Because the light sensor or drive switch 130 is also affected by conditions such as temperature when sensing ambient light, the detection result of the ambient light intensity may be biased. Based on this, the embodiment of the present application controls the first electrochromic strip 142 above a portion of the drive switch 130 to switch to a fully transparent state in the light-sensitive state, so that the drive switch 130 in this portion can receive ambient light, and controls the second electrochromic strip 143 above another portion of the drive switch 130 to switch to an opaque state, so that the drive switch 130 in this portion cannot receive ambient light. Finally, the dimming module 230 obtains an accurate ambient light detection result based on the difference between the detection values ​​of the two portions of the drive switch 130, thereby improving the detection accuracy of the ambient light intensity.

[0069] Furthermore, the first electrochromic strip 142 and the second electrochromic strip 143 are disposed adjacent to each other. Since the chip, circuit, or some components of the display device 10 generate heat when operating for a long period of time, resulting in uneven temperatures across the display panel 100, in order to prevent the drive switches 130 below the first electrochromic strip 142 and the second electrochromic strip 143 from being at different temperatures, the embodiment of the present application disposes the first electrochromic strip 142 and the second electrochromic strip 143 adjacent to each other, reducing the spacing between the first electrochromic strip 142 and the second electrochromic strip 143. This, in turn, reduces the spacing between the drive switches 130 below the first electrochromic strip 142 and the second electrochromic strip 130, thereby mitigating the problem of deviations in detection results caused by different temperatures of the drive switches 130.

[0070] like Figure 9 As shown, in some embodiments, the plurality of electrochromic strips 141 include a first electrochromic strip 142, a second electrochromic strip 143 and a third electrochromic strip 144. When the driving switch 130 enters the photosensitivity stage, the switching module 220 switches the first electrochromic strip 142 to a fully transparent state, the switching module 220 switches the second electrochromic strip 143 to an opaque state, and the switching module 220 switches the third electrochromic strip 144 to a translucent state; the dimming module 230 adjusts the data signal output to the data line 110 according to the current signal output by the driving switch 130 below the first electrochromic strip 142, the current signal output by the driving switch 130 below the second electrochromic strip 143 and the current signal output by the driving switch 130 below the third electrochromic strip 144.

[0071] Compared to a design with only one set of control detection, the embodiment of the present application adopts a two-set control detection design, that is, the embodiment of the present application comprehensively detects the ambient light intensity based on the three states of the drive switch 130. In the light-sensing stage, the first part of the drive switch 130 can receive all the ambient light because the first electrochromic strip 142 above it switches to a fully transparent state; the second part of the drive switch 130 cannot receive the ambient light because the second electrochromic strip 143 above it switches to an opaque state; the third part of the drive switch 130 can only receive half or part of the ambient light because the third electrochromic strip 144 above it switches to a translucent state. The embodiment of the present application uses the difference in photocurrent size of these three parts of the drive switch 130 to calibrate the temperature effect and eliminate the noise interference of the internal circuit of the panel, thereby increasing the accuracy of the contrast light sensing signal calibration.

[0072] Furthermore, the first electrochromic strips 142 , the second electrochromic strips 143 and the third electrochromic strips 144 are disposed adjacent to each other to reduce the problem of deviation in detection results caused by uneven temperature in the display panel 100 .

[0073] Of course, in other embodiments, the electrochromic layer 140 may also be designed in a block shape or other shapes, which can be selected according to actual conditions and is not limited here.

[0074] like Figure 10 As shown, as a display device 10 provided as a third embodiment of the present application, compared to the first embodiment, the electrochromic layer 140 includes a plurality of electrochromic strips 141. The length direction of the electrochromic strips 141 is the same as the length direction of the data lines 110. Each electrochromic strip 141 covers a column of the drive switches 130. This embodiment of the present application can adjust the light transmittance above each column of the drive switches 130 to meet light sensing requirements in different directions.

[0075] For the specific design of the electrochromic strip 141 , reference may be made to the description in the second embodiment, and no further details will be given here.

[0076] In an embodiment of the present application, the switching module 220 can be located in the border area of ​​the display panel 100 and arranged opposite to the source driving circuit 250. At this time, the connection between the switching module 220 and the electrochromic strip 141 is located in the fan-out area on one side of the display panel 100, and the connection between the source driving circuit 250 and the data line 110 is located in the fan-out area on the other side of the display panel 100, avoiding the problem of too many lines in the fan-out area on the same side of the source driving circuit 250, which leads to an increase in the border size.

[0077] It should be noted that the limitations on the various steps involved in this solution do not limit the order of the steps without affecting the implementation of the specific solution. The steps written in front can be executed first, later, or even simultaneously. The solutions of different embodiments can be combined and applied without conflict. As long as this solution can be implemented, it should be regarded as falling within the scope of protection of this application.

[0078] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. A display device comprising a display panel and a driving circuit for driving the display panel, wherein the display panel comprises a plurality of data lines and a plurality of scan lines, wherein the plurality of data lines and the plurality of scan lines divide a plurality of pixel areas, wherein: The display panel includes: a plurality of driving switches, each of the plurality of driving switches being disposed in a corresponding pixel region and connected to a corresponding data line and a scan line; and an electrochromic layer, disposed on at least a portion of the drive switch, for controlling the amount of received light corresponding to the drive switch; The driving circuit includes: A control module, connected to the driving switch, controlling the driving switch to enter a driving stage or a light-sensing stage; a switching module connected to the electrochromic layer and the control module, and controlling the light transmittance of the electrochromic layer according to the stage of the driving switch; and a dimming module connected to the driving switch, and adjusting the data signal output to the data line according to the current signal output by the driving switch in the light-sensing stage; Among them, when the driving switch enters the driving stage, the driving switch receives a data signal and drives the corresponding pixel, and the switching module switches the electrochromic layer to an opaque state; when the driving switch enters the light-sensing stage, the driving switch receives a blank signal, and the switching module switches the electrochromic layer to at least a partially transparent state, corresponding to the driving switch receiving external ambient light.

2. The display device according to claim 1, wherein The driving circuit includes a gate driving circuit and a source driving circuit, the gate driving circuit is connected to the scan line, and the source driving circuit is respectively connected to the data line, the control module and the dimming module; When the driving switch enters the driving stage, the gate driving circuit outputs a scanning signal to the scanning line, and the source driving circuit outputs a data signal to the data line; when the driving switch enters the photosensitive stage, the gate driving circuit outputs a scanning signal to the scanning line, and the source driving circuit outputs a blank signal to the data line.

3. The display device according to claim 2, wherein The electrochromic layer includes a plurality of electrochromic strips, the length direction of the electrochromic strips is the same as the length direction of the scanning lines, and each of the electrochromic strips covers a row of the driving switches; The switching module is integrated into the gate driving circuit.

4. The display device according to claim 3, wherein The gate drive circuit includes multiple gate drive units, and the switching module includes multiple switching units. Each switching unit drives the corresponding electrochromic strip. The switching units are integrated one-to-one in the gate drive unit. When the gate drive unit outputs a scan signal to the corresponding row scan line, the switching unit simultaneously outputs a switching signal to the electrochromic strip in the same row to control the light transmittance of the electrochromic strip.

5. The display device according to claim 2, wherein The electrochromic layer includes a plurality of electrochromic strips, the length direction of the electrochromic strips is the same as the length direction of the data lines, and each of the electrochromic strips covers a column of the driving switches.

6. The display device according to claim 3 or 5, wherein: The plurality of electrochromic strips include a first electrochromic strip and a second electrochromic strip, and when the driving switch enters the light-sensing stage, the switching module switches the first electrochromic strip to a fully transparent state, and the switching module switches the second electrochromic strip to an opaque state; The dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch under the first electrochromic stripe and the current signal output by the driving switch under the second electrochromic stripe.

7. The display device according to claim 6, wherein The first electrochromic strip and the second electrochromic strip are arranged adjacent to each other.

8. The display device according to claim 3 or 5, wherein: The plurality of electrochromic strips include a first electrochromic strip, a second electrochromic strip, and a third electrochromic strip. When the driving switch enters the light-sensing stage, the switching module switches the first electrochromic strip to a fully transparent state, the switching module switches the second electrochromic strip to an opaque state, and the switching module switches the third electrochromic strip to a semi-transparent state. The dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch under the first electrochromic stripe, the current signal output by the driving switch under the second electrochromic stripe, and the current signal output by the driving switch under the third electrochromic stripe.

9. The display device according to claim 1, wherein The light-sensing stage is located in the blank stage between two adjacent frames.

10. A method for driving a display device, for driving the display device according to any one of claims 1 to 9, characterized in that: The driving method includes: Display step: driving the switch to receive the data signal, driving the corresponding pixel, and the switching module switches the electrochromic layer to an opaque state; Detection step: the driving switch receives a blank signal, and the switching module switches the electrochromic layer to at least a partially transparent state; Dimming step: The dimming module adjusts the data signal output to the data line according to the current signal output by the driving switch in the detecting step.

Images