Display panel, display device and control method for brightness of display device

Abstract

The invention provides a display panel, display equipment and a brightness control method of the display equipment. The array substrate comprises a first substrate, a data line, a gate line, a first common electrode and a shading electrode, the opposite substrate comprises a second substrate, a color filter layer, a second common electrode and a first shading layer; the liquid crystal layer is arranged between the array substrate and the opposite substrate; the array substrate further comprises a first common electrode and a pixel electrode, the first common electrode is arranged between the two adjacent data lines, a gap is formed between the first common electrode and the first data line in the two adjacent data lines, and the shading electrode covers the data lines and the gap; the opposite substrate further comprises a first shading layer, the projection of the first shading layer on the array substrate covers the data lines, the gate lines and the first common electrodes, and a light-transmitting area is formed in the area, opposite to the interval, of the opposite substrate. According to the technical scheme, the screen flash problem of the display equipment in the VRR mode in the related technology can be solved.

Description

Technical Field

[0001] The embodiments of the present application relate to display device technology, and more specifically, to a display panel, a display device, and a method for controlling the brightness of a display device. Background Art

[0002] At present, in order to ensure that when a display device plays a video image with a fixed frame rate, the picture will not be delayed, stuck, or torn due to the inconsistency between the field frequency signal frequency of the display device and the input image frame rate, the variable refresh rate technology is introduced in the relevant technology, and the field frequency signal frequency of the display device is kept consistent with the image frame rate by continuously adjusting the field frequency signal to avoid the display device screen tearing or stuttering. For example, for game videos, the pictures output by the game console are usually frame-locked, and the number of frames of different games is also different, which can easily cause the display device to tear the picture. The variable refresh rate (VRR) can adjust the display refresh frequency (i.e., the field frequency signal frequency) to keep it consistent with the input image frame rate, that is, when the game frame number increases, the refresh rate of the display also increases, so that the user can get a smoother visual experience. When the game frame number decreases, the refresh rate of the display also decreases to reduce the power consumption of the display.

[0003] However, in the variable refresh rate mode, for LCD display devices, the brightness of the image displayed on the display panel is different under field rate signals of different frequencies. If the frequency of the field rate signal changes more dramatically, the image brightness of the display panel will change more significantly, and the display device will flicker, affecting the user experience.

[0004] Therefore, it is necessary to provide a display device to solve the problem of screen flickering when the display device is in a variable refresh rate mode. Summary of the invention

[0005] The present application provides a display panel, a display device, a method for controlling the brightness of a display device, and a display device. Application of the technical solution of the present application can effectively solve the problem of screen flickering in a display device in a VRR mode in the related art.

[0006] In a first aspect, an embodiment of the present application provides a display panel, the display panel comprising:

[0007] An array substrate, the array substrate comprising a first substrate and a plurality of data lines, a plurality of gate lines, a light shielding electrode, a first common electrode and a pixel electrode arranged on the first substrate, the data lines and the gate lines are crisscrossed to form a pixel unit, the first common electrode is arranged between two adjacent data lines, there is a gap between the first common electrode and one of the two adjacent data lines, the light shielding electrode covers the data line and the gap, and the pixel electrode is arranged between the two data lines;

[0008] An opposite substrate is arranged opposite to the array substrate, and includes a second substrate, a color filter layer arranged on the second substrate, and a second common electrode arranged on a side of the color filter layer away from the second substrate;

[0009] A liquid crystal layer is disposed between the array substrate and the opposite substrate;

[0010] The opposite substrate also includes a first shading layer, which blocks part of the color filter layer. The projection of the first shading layer on the array substrate covers the data lines and the gate lines. The area on the opposite substrate opposite to the interval forms a light-transmitting area.

[0011] In some embodiments, the data line has a first edge away from the first common electrode and a second edge close to the first common electrode, the first boundary of the first light shielding layer is flush with the first edge of the data line, and the second boundary of the first light shielding layer is flush with the second edge of the data line.

[0012] In some embodiments, the data line has a first edge away from the first common electrode and a second edge close to the first common electrode, the first boundary of the first light shielding layer is flush with the first edge of the data line, the second boundary of the first light shielding layer extends into the interval and has a distance between the second edge of the data line, and the length L1 of the distance satisfies the length L2 of the interval:

[0013] 1 / 7≤L1 / L2≤1 / 5.

[0014] In some embodiments, the opposing substrate also includes a second shading layer, which blocks part of the color filter layer. The projection of the second shading layer on the array substrate covers the first common electrode, and the area between the first shading layer and the second shading layer of the opposing substrate forms a light-transmitting area.

[0015] In some embodiments, the first common electrode has a first edge away from the pixel electrode and a second edge close to the pixel electrode, the first boundary of the second shading layer is flush with the first edge of the first common electrode, and the second boundary of the second shading layer is flush with the second edge of the first common electrode.

[0016] An embodiment of the present application provides a display panel, which includes: an array substrate, an opposite substrate, and a liquid crystal layer.

[0017] An array substrate, the array substrate comprising a first substrate, a TFT circuit disposed on the array substrate, and a pixel electrode connected to the TFT circuit;

[0018] An opposite substrate is arranged opposite to the array substrate, and the substrate comprises a second substrate and a color filter layer arranged on the second substrate;

[0019] A liquid crystal layer is disposed between the array substrate and the opposite substrate;

[0020] The opposing substrate includes a first area opposite to the pixel electrode and a second area other than the first area. The second area has a coated area coated with a black matrix and a light-transmitting area. A shading electrode is also provided on the array substrate. The projection of the shading electrode on the opposing substrate covers at least part of the light-transmitting area.

[0021] In a second aspect, the present application provides a display device, and the display device includes the above-mentioned display panel.

[0022] In some embodiments, the display device further includes: a power supply, a controller, and a backlight source, and the controller includes a whole machine controller and a panel controller; wherein,

[0023] The power supply is connected to the whole machine controller and the backlight source respectively; the power supply is used to provide power supply signals to the whole machine controller and the backlight source; the whole machine controller is connected to the panel controller and is configured to supply power to the panel controller and provide image signals, and the light shielding electrode is connected to the panel controller;

[0024] The whole machine controller is configured to: send an image signal to the panel controller;

[0025] The panel controller is configured to: receive an image signal, determine a frequency interval in which a field rate signal frequency corresponding to the image signal is located, determine an adjustment voltage of the light-shielding electrode according to the frequency interval in which the field rate signal frequency is located, and adjust the voltage of the light-shielding electrode based on the adjustment voltage of the light-shielding electrode.

[0026] In a third aspect, the present application provides a method for controlling the brightness of a display device, which is applied to the above-mentioned display device, and the method includes:

[0027] The whole machine controller sends an image signal to the panel controller;

[0028] The panel controller receives the image signal and determines the frequency interval where the field rate signal frequency corresponding to the image signal is located;

[0029] The panel controller adjusts the voltage of the light shielding electrode of the display device according to the frequency interval of the field rate signal.

[0030] In some embodiments, the step of the controller determining the adjustment voltage of the light shielding electrode according to the frequency of the field frequency signal includes:

[0031] When the field rate signal frequency at the current acquisition moment is in the first frequency interval, the panel controller sets the voltage of the light-shielding electrode to the first voltage; when the field rate signal frequency at the current acquisition moment is in the second frequency interval, the panel controller sets the voltage of the light-shielding electrode to the second voltage.

[0032] The frequency values ​​of the field frequency signals in the first frequency interval are all smaller than those in the second frequency interval, and the absolute value of the voltage difference between the first voltage and the second common electrode is larger than the absolute value of the voltage difference between the second voltage and the second common electrode.

[0033] According to the technical solution of the present application, a plurality of data lines are arranged on the array substrate, a first common electrode is arranged between two adjacent data lines, a gap is provided between the first common electrode and the first data line of the two adjacent data lines, and the light of the backlight source can penetrate the gap and enter the liquid crystal layer. The opposite substrate also includes a first light shielding layer, and the first light shielding layer is designed to project on the array substrate to cover the data lines and gate lines, so that the area on the opposite substrate opposite to the gap forms a light-transmitting area. On the one hand, this arrangement blocks the top of the data lines and gate lines through the first light shielding layer. Even if the metal wiring and the second common electrode on the opposite substrate form a capacitor, causing the arrangement of the liquid crystal to change and transmit light, so that part of the light is transmitted, the first light shielding layer will also block this part of the light transmission to ensure normal display. On the other hand, the first light shielding layer can form a light-transmitting area in the area opposite to the interval on the opposite substrate, and the top and bottom of the liquid crystal layer located below the light-transmitting area are respectively provided with a second common electrode and a light-shielding electrode, and the deflection of the liquid crystal can be adjusted by adjusting the voltage difference between the second common electrode and the light-shielding electrode, thereby adjusting the brightness of the display panel, and appropriately reducing the voltage difference between the second common electrode and the light-shielding electrode when the frequency value of the frequency signal of the display device increases. When the frequency value of the frequency signal of the display device decreases, the voltage difference between the second common electrode and the light-shielding electrode is appropriately increased, so that the display device can achieve brightness compensation in the VRR mode. Therefore, the present application increases a light-transmitting gap on the display panel by changing the structure of the display panel, thereby increasing the aperture ratio of the pixel. At the same time, a second common electrode and a light-shielding electrode are arranged at the top and bottom of the liquid crystal layer at the light-transmitting gap, so that the brightness compensation in the VRR mode can be achieved by adjusting the brightness at the light-transmitting gap, effectively reducing the screen flickering phenomenon of the display device in the VRR mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0035] Figure 1 A schematic structural diagram of an array substrate in the related art is shown;

[0036] Figure 2 A schematic structural diagram of a first display panel in the related art is shown;

[0037] Figure 3 A schematic structural diagram of a second display panel in the related art is shown;

[0038] Figure 4 A schematic diagram of brightness change of a display device provided in this application;

[0039] Figure 5 A schematic diagram of the structure of the first display panel provided in this application;

[0040] Figure 6 A schematic diagram of the structure of a second display panel provided in this application;

[0041] Figure 7 A schematic structural diagram of an array substrate of a display panel provided in the present application;

[0042] Figure 8 A schematic diagram of the structure of a display device provided in this application;

[0043] Fig. 9 A schematic diagram of a flow chart of a first method for controlling brightness of a display device provided in the present application;

[0044] Fig.10 A schematic flow chart of a second method for controlling the brightness of a display device provided in the present application.

[0045] Reference numerals:

[0046] 10. Display panel; 11. Light-transmitting area; 12. Non-light-transmitting area; 13. Pixel display area; 14. Pixel non-display area;

[0047] 100, array substrate; 110, first substrate; 120, data line; 121, first data line; 122, second data line; 130, gate line; 140, light shielding electrode; 150, first common electrode; 160, pixel electrode; 170, spacer; 180, thin film transistor;

[0048] 200, counter substrate; 210, second substrate; 220, color filter layer; 230, second common electrode; 240, light shielding layer; 241, first light shielding layer; 242, second light shielding layer;

[0049] 300, liquid crystal layer;

[0050] 20. Display device;

[0051] 400, power supply;

[0052] 510, whole machine controller; 520, panel controller;

[0053] 700. Backlight. DETAILED DESCRIPTION

[0054] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0055] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0056] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0057] A conventional liquid crystal display panel includes an array substrate (TFT substrate), an opposite substrate (color filter substrate / CF substrate), and a liquid crystal layer interposed between the array substrate and the opposite substrate.

[0058] Figure 1 A schematic structural diagram of an array substrate in the related art is shown.

[0059] like Figure 1 As shown, the array substrate 100 includes a data line 120, a gate line 130, a first common electrode 150, a light shielding electrode 140, a thin film transistor 180 and a pixel electrode 160. The data line 120 and the gate line 130 are perpendicular to each other and define a pixel area.

[0060] Specifically, there are n horizontal gate lines and 3m vertical data lines on the array substrate, defining (3m×n) pixels, which are arranged in a matrix at a certain interval. There are three types of pixels, red (R), green (G) and blue (B), on the opposite substrate, with the number of each type of pixel being (m×n), and they are also arranged in a matrix at a certain interval. Each pixel dot on the display panel is composed of three sub-pixels of red, green and blue on the opposite substrate, and each sub-pixel (unit pixel) corresponds one-to-one to a unit pixel on the array substrate.

[0061] The pixel electrode 160 and the thin film transistor 180 are disposed in the pixel region, and the pixel electrode 160 is electrically connected to the data line 120 and the gate line 130 through the thin film transistor 180. The pixel region includes a pixel display region (pixel opening region) 13 and a non-pixel display region (pixel non-opening region) 14.

[0062] The pixel display area 13 forms a liquid crystal capacitor through the pixel electrode 160 on the array substrate 100 and the second common electrode 230 on the opposite substrate 200. By controlling the voltage difference between the two, the liquid crystal molecules are deflected, allowing a certain amount of light to pass through, thereby realizing display. Various metal wirings (data lines 120, gate lines 130, etc.) are distributed in the non-pixel display area 14. The metal wirings and the second common electrode 230 on the opposite substrate 200 will also form a capacitor, allowing part of the light to pass through, causing display abnormalities. Therefore, in order to display normally, a light shielding layer is usually set to prevent light leakage, display abnormalities, etc. in certain scenes.

[0063] At present, there are two ways of shading in the industry, specifically:

[0064] like Figure 2 As shown, in the first way, a black matrix is ​​disposed in the opposite substrate 200 as a light shielding layer 240 to shield the metal wiring on the array substrate 100 .

[0065] like Figure 3 As shown, the second method is to set a shading electrode 140 (transparent ITO layer) in the array substrate 100, so that the voltage of the shading electrode 140 is equal to the second common electrode 230, to ensure that the liquid crystal molecules are vertical, control the corresponding area without light transmission, thereby achieving the effect of shading.

[0066] However, in VRR mode, for display devices, due to the inconsistent pixel penetration rates under field frequency signals of different frequencies, the brightness of the image displayed on the display panel is different. If the frequency of the field frequency signal changes more drastically, the image brightness of the display panel will change more significantly, and the display device will flicker, affecting the user experience.

[0067] In a display device, the transmittance of the liquid crystal can be controlled by controlling the magnitude of the voltage loaded on the liquid crystal layer. Specifically, when the display device is working, each time the image displayed on the display panel is refreshed, the charge on the capacitor in parallel with the liquid crystal layer is lost once along the turned-on switch tube, and the voltage value at both ends of the liquid crystal layer will decrease. As the voltage value at both ends of the liquid crystal layer decreases, the deflection angle of the liquid crystal will also decrease, and the light that can pass through the liquid crystal unit of the light-emitting element will also decrease, resulting in a decrease in the brightness of the display panel. The slower the display screen is updated, the lower the frequency of the corresponding field frequency signal of the display device, and the more charge in the corresponding control circuit is lost through the switch tube. Therefore, the brightness of the display panel is different at different field frequency signals. Figure 4 As shown, Figure 4 A schematic diagram of brightness change of a display device provided by the present application. In the figure, the horizontal axis represents the frequency value of the field frequency signal, and the vertical axis represents the brightness value. It can be seen that the greater the field frequency signal, the higher the displayed brightness. When the field frequency signal in the display device changes dramatically, the display brightness will also change dramatically, causing the display device screen to flicker, affecting the user experience.

[0068] The present embodiment provides a display panel 10, which includes an array substrate 100. A data line 120 and a first common electrode 140 are arranged on the array substrate 100, so that a gap is formed between the data line 120 and the first common electrode 140, and a light-transmitting area is formed at the gap. By controlling the amount of light transmitted in the area, the transmittance of the entire pixel is compensated, and the display panel 100 can be applied to brightness compensation in the VRR mode.

[0069] The specific structure of the display panel 10 of this embodiment is described below with reference to the accompanying drawings.

[0070] Figure 5 A schematic diagram of the structure of a display panel provided in this application; Figure 7 A schematic structural diagram of an array substrate of a display panel provided in the present application.

[0071] like Figure 5 and Figure 7 As shown, the display panel 10 of this embodiment includes: an array substrate 100 , an opposite substrate 200 , and a liquid crystal layer 300 .

[0072] The array substrate 100 includes a first substrate 110 and a plurality of data lines 120, a plurality of gate lines 130, a light shielding electrode 140, a first common electrode 150 and a pixel electrode 160 disposed on the first substrate 110. The data lines 120 and the gate lines 130 are crisscrossed to form a pixel unit. The first common electrode 150 is disposed between two adjacent data lines 120. The first common electrode 150 and one of the two adjacent data lines (such as Figure 5There is a gap between the first data line 121 shown in the figure, the light shielding electrode covers the data line and the gap, and the pixel electrode is arranged between the first common electrode and the other of the two adjacent data lines (such as Figure 5 between the first data lines 122 shown.

[0073] It should be noted that the first substrate 110 is also called a TFT glass substrate and can be made of 0.5-0.7 mm thick alkali-free glass. The data line 120 and the gate line 130 are metal lines disposed on the first substrate 110. The first common electrode 150 is a thin film structure, and the first common electrode is formed of indium tin oxide (Indium-TinOxide, ITO). The pixel electrode 160 is a thin film structure, and the pixel electrode is formed of indium tin oxide.

[0074] The counter substrate 200 is arranged opposite to the array substrate 100, and the counter substrate 200 includes a second substrate 210, a color filter layer 220 arranged on the second substrate 210, and a second common electrode 230 arranged on the side of the color filter layer 220 away from the second substrate 210. Among them, the second substrate 210 is also called a CF glass substrate, and its material is the same as that of the first substrate 110. The color filter layer 220 is an RGB filter film for transmitting R, G, and B three-color light. The second common electrode 230 is a thin film structure, also known as a second common electrode ITO, and the second common electrode is formed of indium tin oxide (Indium-TinOxide, ITO).

[0075] The liquid crystal layer 300 is disposed between the array substrate 100 and the opposite substrate 200 , and the voltage on both sides of the liquid crystal layer 300 can be adjusted through the hole to change the crystal arrangement state in the liquid crystal layer, thereby changing the light transmittance.

[0076] Furthermore, the first common electrode 150 is arranged between two adjacent data lines 120, and there is a gap 170 between the first common electrode 150 and the first data line 121 of the two adjacent data lines 120, the shading electrode 140 covers the data line 120 and the gap 170, and the pixel electrode 160 is arranged between the first common electrode 150 and the second data line 122 of the two adjacent data lines 120; the opposing substrate 200 also includes a first shading layer 241, the first shading layer 241 blocks part of the color filter layer 220, and the projection of the first shading layer 241 on the array substrate 100 covers the data line 120 and the gate line 130, and the area on the opposing substrate 200 opposite to the gap 170 forms a light-transmitting area 11.

[0077] By applying the technical solution of this embodiment, a plurality of data lines 120 are arranged on the array substrate 100, a first common electrode 150 is arranged between two adjacent data lines 120, a gap 170 is provided between the first common electrode 150 and the first data line 121 of the two adjacent data lines 120, and light from the backlight source can pass through the gap 170 and enter the liquid crystal layer 300. The opposing substrate 200 also includes a first light-shielding layer 241. In the present embodiment, the first light-shielding layer 241 is designed to project onto the array substrate 100 to cover the data line 120 and the gate line 130. The area covered by the first light-shielding layer 241 forms a non-light-transmitting area 12, and the area on the opposing substrate 200 opposite to the gap 170 forms a light-transmitting area 11. This arrangement, on the one hand, blocks the top of the data line 120 and the gate line 130 through the first light-shielding layer 241. Even if a capacitor is formed between the metal wiring and the second common electrode 230 on the opposing substrate 200, causing the arrangement of the liquid crystal to change and become light-transmitting, allowing part of the light to pass through, the first light-shielding layer 241 will also block this part of the light-transmitting area to ensure that the display contrast meets the requirements.

[0078] On the other hand, the first light shielding layer 241 can form a light-transmitting area 11 in the area opposite to the spacer 170 on the counter substrate 200. The top and bottom of the liquid crystal layer below the light-transmitting area 11 respectively have a second common electrode 230 and a light-shielding electrode 140. The deflection of the liquid crystal can be adjusted by adjusting the voltage difference between the second common electrode 230 and the light-shielding electrode 140, thereby changing the transmittance and adjusting the brightness of the display panel 10. When the frequency value of the frequency signal of the display device increases, the voltage difference between the second common electrode 230 and the light-shielding electrode 140 is reduced, so that the brightness of the display device is reduced. When the frequency value of the frequency signal of the display device decreases, the voltage difference between the second common electrode 230 and the light-shielding electrode 140 is increased, so that the brightness of the display device is improved, so that the display device can achieve brightness compensation in the VRR mode.

[0079] Therefore, in this embodiment, by changing the structure of the display panel, a light-transmissive gap 170 is added to the display panel, thereby increasing the aperture ratio of the pixel. At the same time, a second common electrode 230 and a light-shielding electrode 140 are arranged at the top and bottom of the liquid crystal layer 300 at the light-transmissive gap 170, so that brightness compensation in the VRR mode can be achieved by adjusting the brightness at the light-transmissive gap 170, effectively reducing the screen flicker phenomenon of the display device in the VRR mode.

[0080] It should be noted that the first light shielding layer 241 is BM (Black matrix).

[0081] It should also be noted that, when the display device is in a non-VRR mode, the voltage of the light-shielding electrode is equal to the voltage of the second common electrode 230 , thus achieving a normal light-shielding effect.

[0082] Furthermore, if Figure 5 As shown, in some embodiments, the data line 120 has a first edge away from the first common electrode 150 and a second edge close to the first common electrode 150, the first boundary of the first light-shielding layer 241 is flush with the first edge of the data line 120, and the first boundary of the first light-shielding layer 241 is flush with the first edge of the data line 120.

[0083] The above structure can effectively shield the data line 120 by making the boundary of the first light shielding layer 241 flush with the edge of the data line 120, thereby reducing the risk of low contrast when the display device displays an image. On the other hand, the above arrangement can also ensure the light-transmitting area above the gap 170, thereby increasing the aperture ratio of the pixel and further reducing the screen flicker phenomenon of the display device in the VRR mode.

[0084] Of course, in other embodiments, the boundary of the first light-shielding layer 241 may not strictly correspond to the edge of the data line 120. Specifically, the data line 120 has a first edge away from the first common electrode 150 and a second edge close to the first common electrode 150. The first boundary of the first light-shielding layer 241 is flush with the first edge of the data line 120. The second boundary of the first light-shielding layer 241 extends into the interval 170 and has a distance from the second edge of the data line 120. The length L1 of the distance satisfies the length L2 of the interval 170: 1 / 7≤L1 / L2≤1 / 5.

[0085] This arrangement enables the first light shielding layer to have a better light shielding effect and ensure the contrast of the display device. At the same time, it can also leave enough space above the interval 170 to increase the aperture ratio of the pixel, so that the display device can reduce the screen flicker phenomenon in the VRR mode. However, it should be noted that the second boundary extension of the first light shielding layer 241 should not exceed the excessive distance of the second edge of the data line 120, which will cause the pixel aperture ratio to be insufficient, and then cause the pixel area that can be adjusted for brightness in accordance with the VRR mode to become smaller, which is not conducive to alleviating the screen flicker phenomenon in the VRR mode. Therefore, the distance L1 between the second boundary of the first light shielding layer 241 and the second edge of the data line 120 and the length L2 of the interval 170 can satisfy: 1 / 7≤L1 / L2≤1 / 5, and the screen flicker phenomenon can be reduced when the display device is in the VRR mode while ensuring the contrast of the display device.

[0086] Exemplarily, the ratio of L1 / L2 may be 1 / 7, 1 / 6 or 1 / 5.

[0087] In some embodiments, the counter substrate 200 may further be provided with a second light shielding layer 242. Figure 6 This is a schematic diagram of the structure of the second display panel provided in this application. Specifically, Figure 6 As shown, the second light shielding layer 242 shields part of the color filter layer 220, and the projection of the second light shielding layer 242 on the array substrate 100 covers the first common electrode 150. The area between the first light shielding layer 241 and the second light shielding layer 242 of the opposite substrate 200 forms a light-transmitting area 11, and the first light shielding layer 241 and the second light shielding layer 242 form a non-light-transmitting area 12. This arrangement can also ensure the light shielding effect of the light shielding layer while increasing the pixel aperture ratio, so that the display device has a higher contrast.

[0088] Continue to refer to Figure 6 As shown, the first common electrode 150 has a first edge away from the pixel capacitor and a second edge close to the pixel capacitor, the first boundary of the second shading layer 242 is flush with the first edge of the first common electrode 150, and the first boundary of the first shading layer 241 is flush with the first edge of the first common electrode 150.

[0089] This arrangement enables the second light shielding layer 242 to shield the first common electrode 150 , while also ensuring the aperture ratio of the pixel, thereby reducing screen flicker when the display device is in VRR mode while ensuring the contrast of the display device.

[0090] In other embodiments, the display panel 10 may further include: an array substrate 100, an opposing substrate 200, and a liquid crystal layer 300. The array substrate 100 includes a first substrate 110, a TFT circuit disposed on the array substrate 100, and a pixel electrode 160 connected to the TFT circuit; the opposing substrate 200 is disposed opposite to the array substrate 100, and the substrate includes a second substrate 210 and a color filter layer 220 disposed on the second substrate 210; the liquid crystal layer 300 is disposed between the array substrate 100 and the opposing substrate 200; the opposing substrate 200 includes a first area opposite to the pixel electrode 160 and a second area other than the first area, the second area having a coating area coated with a black matrix and a light-transmitting area that can transmit light, and a light-shielding electrode 140 is also disposed on the array substrate 100, and the projection of the light-shielding electrode on the opposing substrate 200 covers at least part of the light-transmitting area.

[0091] In the display panel of the above embodiment, the counter substrate 200 includes a first area opposite to the pixel electrode 160 and a second area other than the first area. The first area is used for R, G, and B display of the pixel. A TFT circuit is arranged on the array substrate corresponding to the second area. The second area includes a coating area coated with a black matrix and a light-transmitting area that can transmit light. The coating area can be used to shield the metal wires in the TFT circuit, and the light-transmitting area is used for light transmission. It should be noted that the top of the liquid crystal layer in the light-transmitting area has a second common electrode and the bottom has a light-shielding electrode. The deflection of the liquid crystal can be adjusted by adjusting the voltage difference between the second common electrode 230 and the light-shielding electrode 140, thereby changing the transmittance and adjusting the brightness of the display panel 10. When the frequency value of the frequency signal of the display device increases, the voltage difference between the second common electrode 230 and the light-shielding electrode 140 is reduced, so that the brightness of the display device is reduced. When the frequency value of the frequency signal of the display device decreases, the voltage difference between the second common electrode 230 and the light-shielding electrode 140 is increased, so that the brightness of the display device is improved, so that the display device can achieve brightness compensation in the VRR mode. Therefore, this embodiment increases the aperture ratio of the pixel by changing the structure of the display panel, adding a light-transmissive gap 170 on the display panel. At the same time, a second common electrode 230 and a light-shielding electrode 140 are arranged at the top and bottom of the liquid crystal layer 300 at the light-transmissive gap 170, so that the brightness compensation in the VRR mode can be achieved by adjusting the brightness at the light-transmissive gap 170, effectively reducing the screen flicker phenomenon of the display device in the VRR mode.

[0092] Figure 8 A schematic diagram of the structure of a display device provided in this application, such as Figure 5 and Figure 8 As shown, this embodiment further provides a display device 20 , and the display device 20 includes the above-mentioned display panel 10 .

[0093] The display principle of the display panel is described below.

[0094] The display panel of the TFT-LCD display device mainly includes the following parts: backlight source (not shown), lower polarizer (not shown), array substrate, liquid crystal layer 300, opposite substrate, upper polarizer (not shown). Only polarized light in a specific direction can pass completely. The direction of the upper polarizer is perpendicular to the lower polarizer. If no treatment is added in the middle, only black can be displayed on the final screen. Therefore, a liquid crystal layer is added between the upper polarizer and the lower polarizer. When the light passing through the lower polarizer passes through the liquid crystal layer, the polarization direction is changed by the liquid crystal molecules, so that it can pass through the upper polarizer smoothly, so that white will be displayed on the screen. To achieve the control of the black mouth, it is necessary to be able to control the external electric field of the liquid crystal layer. When the external electric field changes, the orientation of the liquid crystal molecules changes, and you can choose between changing the light direction and keeping it unchanged.

[0095] The control of the electric field is achieved through the TFT switch on the array substrate. The full name of TFT switch is thin film field effect transistor, which is a three-terminal device, actually a type of MOS, which plays a switch role. Generally speaking, the source is connected to the display data signal, the gate is connected to the switch control signal, and the drain is output to the liquid crystal and the corresponding pixel capacitor.

[0096] The display panel 10 is a matrix structure, and each intersection of the matrix corresponds to a TFT switch. The drive signal provided by GateDriver controls the gate switch status of different rows of TFTs, and the data signal provided by Source Driver is sent to the source of different columns of TFTs. When the gate line signal turns on the TFT, the signal line charges the liquid crystal and the storage capacitor from the source to save the data. When the gate line signal turns off the TFT, the high impedance ROFF cuts off the circuit to prevent the data from being changed.

[0097] In order to display colors, a color filter layer needs to be added. A pixel is composed of three liquid crystal cells, corresponding to the three colors of RGB. By controlling different colors at the same time, various colors can be displayed after mixing. When observing the screen under a magnifying glass, it can be found that each pixel is composed of three parts of RGB. At the same time, if you look closely, you can find that each RGB point is not a complete rectangle, but has a part missing. This missing piece is where the TFT switch is located. The total number of colors that can be displayed is determined by the number of bits of the digital signal. For example, an 8-bit RGB signal has 255 grayscales for each of the three RGB colors, and a total of about 16.7M colors can be displayed.

[0098] Specifically, the display device 20 includes, in addition to the display panel 10, a power supply 400, a controller, and a backlight source 700; wherein the controller includes a whole machine controller 510 and a panel controller 520, the power supply 400 is respectively connected to the whole machine controller 510 and the backlight source 700, and is used to provide power supply signals to the whole machine controller 510 and the backlight source 700; the whole machine controller 510 is connected to the panel controller 520, and is configured to supply power to the panel controller 520 and provide image signals, and the shading electrode 140 is connected to the panel controller 520.

[0099] Specifically, the whole machine controller 510 is configured to send an image signal to the panel controller 520; the panel controller 520 is configured to determine the adjustment voltage of the shading electrode according to the frequency interval of the field rate signal frequency, and adjust the voltage of the shading electrode based on the adjustment voltage of the shading electrode.

[0100] In the display device of this embodiment, when in VRR mode, the whole machine controller 510 can send an image signal to the panel controller 520, and the panel controller 520 can receive the image signal and determine the adjustment voltage of the light shielding electrode according to the frequency interval of the field frequency signal. For example, when the field frequency signal frequency at the current acquisition moment is in the first frequency interval, the panel controller 520 sets the voltage of the light shielding electrode to the first voltage; when the field frequency signal frequency at the current acquisition moment is in the second frequency interval, the panel controller 520 sets the voltage of the light shielding electrode to the second voltage. At the same time, the panel controller 520 can also adjust the voltage of the light shielding electrode based on the adjustment voltage of the light shielding electrode. Specifically, the field frequency signal frequency values ​​in the first frequency interval are all less than the field frequency signal frequency values ​​in the second frequency interval, and the absolute value of the voltage difference between the first voltage and the second common electrode is greater than the absolute value of the voltage difference between the second voltage and the second common electrode. When the field frequency signal frequency at the current acquisition moment increases from the first frequency interval to the second frequency interval, it means that the field frequency signal frequency increases, and the pixel penetration rate is high at this time. Correspondingly, the brightness of the display device is reflected, and the brightness will be enhanced. At this time, the panel controller 520 can adjust the voltage of the light shielding electrode from the first voltage to the second voltage. Since the absolute value of the voltage difference between the first voltage and the second common electrode is greater than the absolute value of the voltage difference between the second voltage and the second common electrode, it means that at this time, the voltage difference between the light shielding electrode 140 and the second common electrode 230 is small, thereby reducing the brightness of the display device to achieve brightness balance of the display device. Similarly, when the frequency of the field signal at the current acquisition moment is reduced from the second frequency interval to the second frequency interval, it means that the frequency of the field signal is reduced. At this time, the penetration rate of the pixel is low. Correspondingly, reflected in the brightness of the display device, the brightness will be reduced. At this time, the panel controller 520 can adjust the voltage of the light shielding electrode from the second voltage to the first voltage. Since the absolute value of the voltage difference between the first voltage and the second common electrode is greater than the absolute value of the voltage difference between the second voltage and the second common electrode, it means that at this time, the voltage difference between the light shielding electrode 140 and the second common electrode 230 increases, thereby increasing the brightness of the display device to achieve brightness balance of the display device. Therefore, the display device of this embodiment improves the structure of the display panel 10 to increase the aperture ratio of the pixels, and adjusts the voltage of the light-shielding electrode 140 through the whole machine controller 510 and the panel controller 520 to achieve brightness compensation for the display panel in the VRR mode.

[0101] Fig. 9 A flow chart of a first method for controlling the brightness of a display device provided in an embodiment of the present application, which is applied to Figure 4 The display device shown in the figure comprises the following steps:

[0102] S101: The whole machine controller 510 sends an image signal to the panel controller 520;

[0103] S102: The panel controller 520 receives an image signal and determines a frequency interval where a field rate signal corresponding to the image signal is located;

[0104] S103: The panel controller 520 adjusts the voltage of the light shielding electrode of the display device according to the frequency interval of the field rate signal.

[0105] The method provided in this embodiment can refer to the solution description on the corresponding device side. Its implementation principle and technical effects are similar and will not be repeated here.

[0106] Fig.10 A flow chart of a second method for controlling the brightness of a display device provided in an embodiment of the present application is shown in the figure. The method includes the following steps:

[0107] S201: The whole machine controller 510 sends an image signal to the panel controller;

[0108] S201: The panel controller 520 receives an image signal and determines a field rate signal frequency corresponding to the image signal;

[0109] S203: when the frequency of the field rate signal at the current acquisition moment is in the first frequency interval, the panel controller sets the voltage of the light shielding electrode to the first voltage; when the frequency of the field rate signal at the current acquisition moment is in the second frequency interval, the panel controller sets the voltage of the light shielding electrode to the second voltage;

[0110] The frequency values ​​of the field frequency signals in the first frequency interval are all smaller than those in the second frequency interval, and the absolute value of the voltage difference between the first voltage and the second common electrode is larger than the absolute value of the voltage difference between the second voltage and the second common electrode.

[0111] The method provided in this embodiment can refer to the solution description on the corresponding device side. Its implementation principle and technical effects are similar and will not be repeated here.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0113] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display panel, characterized in that: The display panel comprises: An array substrate, the array substrate comprising a first substrate and a plurality of data lines, a plurality of gate lines, a light shielding electrode, a first common electrode and a pixel electrode arranged on the first substrate, the data lines and the gate lines being crisscrossed to form a pixel unit, the first common electrode being arranged between two adjacent data lines, a gap being provided between the first common electrode and one of the two adjacent data lines, the light shielding electrode covering the data line and the gap, and the pixel electrode being arranged between the first common electrode and the other of the two adjacent data lines; an opposite substrate, arranged opposite to the array substrate, the opposite substrate comprising a second substrate, a color filter layer arranged on the second substrate, a first light shielding layer, and a second common electrode arranged on a side of the color filter layer away from the second substrate; A liquid crystal layer is disposed between the array substrate and the opposite substrate; The opposing substrate also includes a first shading layer, which blocks part of the color filter layer. The projection of the first shading layer on the array substrate covers the data lines, the gate lines, and the first common electrode lines. The area on the opposing substrate opposite to the interval forms a light-transmitting area.

2. The display panel according to claim 1, characterized in that: The data line has a first edge away from the first common electrode and a second edge close to the first common electrode, a first boundary of the first light shielding layer is flush with the first edge of the data line, and a second boundary of the first light shielding layer is flush with the second edge of the data line.

3. The display panel according to claim 1, characterized in that: The data line has a first edge away from the first common electrode and a second edge close to the first common electrode, the second boundary of the first light shielding layer extends into the interval and has a distance between the second edge of the data line, and the length L1 of the distance satisfies the length L2 of the interval: 1 / 7≤L1 / L2≤1 / 5.

4. The display panel according to any one of claims 1 to 3, characterized in that: The array substrate also includes a second shading layer, which blocks part of the color filter layer. The projection of the second shading layer on the array substrate is flush with the edge of the first common electrode. The area between the first shading layer and the second shading layer of the opposing substrate forms the light-transmitting area.

5. The display panel according to claim 4, characterized in that: The first common electrode has a first edge away from the pixel electrode and a second edge close to the pixel electrode, the first boundary of the second shading layer is flush with the first edge of the first common electrode, and the second boundary of the second shading layer is flush with the first edge of the first common electrode of an adjacent pixel.

6. A display panel, characterized in that: The display panel comprises: An array substrate, the array substrate comprising a first substrate, a TFT circuit disposed on the array substrate, and a pixel electrode connected to the TFT circuit; An opposite substrate, arranged opposite to the array substrate, the substrate comprising a second substrate and a color filter layer arranged on the second substrate; A liquid crystal layer is disposed between the array substrate and the opposite substrate; The opposing substrate includes a first area opposite to the pixel electrode and a second area other than the first area, wherein the second area has a coating area coated with a black matrix and a light-transmitting area. A light-shielding electrode is also provided on the array substrate, and the projection of the light-shielding electrode on the opposing substrate covers at least part of the light-transmitting area.

7. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 6.

8. The display device according to claim 7, characterized in that The display device further includes: a power supply, a controller and a backlight source, wherein the controller includes a whole machine controller and a panel controller; wherein, The power supply is connected to the whole machine controller and the backlight source respectively; the power supply is used to provide power supply signals to the whole machine controller and the backlight source; the whole machine controller is connected to the panel controller and is configured to supply power to the panel controller and provide image signals, and the light shielding electrode is connected to the panel controller; The whole machine controller is configured to: send an image signal to the panel controller; The panel controller is configured to: receive the image signal, and determine the frequency interval in which the field rate signal frequency corresponding to the image signal is located, determine the adjustment voltage of the light-shielding electrode according to the frequency interval in which the field rate signal frequency is located, and adjust the voltage of the light-shielding electrode based on the adjustment voltage of the light-shielding electrode.

9. A method for controlling the brightness of a display device, characterized in that: Applied to the display device as claimed in claim 8, the method comprises: The whole machine controller of the display device sends an image signal to the panel controller; The panel controller receives an image signal and determines a frequency interval where a field rate signal corresponding to the image signal is located; The panel controller adjusts the voltage of the light shielding electrode of the display device according to the frequency interval where the frequency of the field rate signal is located.

10. The method for controlling the brightness of a display device according to claim 9, characterized in that: The step of the panel controller determining the voltage of the light shielding electrode according to the frequency of the field rate signal comprises: When the field rate signal frequency at the current acquisition moment is in the first frequency interval, the panel controller sets the voltage of the light-shielding electrode to the first voltage; when the field rate signal frequency at the current acquisition moment is in the second frequency interval, the panel controller sets the voltage of the light-shielding electrode to the second voltage. The frequency values ​​of the field rate signals in the first frequency interval are all smaller than the frequency values ​​of the field rate signals in the second frequency interval, and the absolute value of the voltage difference between the first voltage and the second common electrode is larger than the absolute value of the voltage difference between the second voltage and the second common electrode.

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