Display panel and display device
By introducing a thickness detection unit into the liquid crystal display panel, the substrate spacing is detected and the pixel brightness is adjusted, thus solving the problem of uneven liquid crystal cell thickness and improving the display effect.
Patent Information
- Application Number
- CN202511072545.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2025-10-31
AI Technical Summary
Existing liquid crystal display devices suffer from uneven liquid crystal cell thickness due to variations in the cell-forming process of sealing the liquid crystal or different bending and extrusion pressures during manufacturing, and lack of detection structures, which affects the display effect.
A thickness detection unit is introduced into the display panel, including a first circuit layer, a variable resistance bridge, and a second circuit layer. By detecting the spacing between the substrates where the pixels are located, the brightness of the pixels is adjusted to balance the cell thickness.
By detecting the substrate spacing and adjusting the pixel brightness, the problem of yellowing or bluish discoloration of the display panel caused by uneven cell thickness was improved, thus enhancing the display quality.
Smart Images
Figure CN120871484A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of semiconductor device technology, and more particularly to a display panel and display device. Background Technology
[0002] Due to the advantages of LCD screens such as low cost, low power consumption, small size, and low radiation, the display industry is rapidly developing towards larger and thinner LCD screens. However, existing LCD display devices suffer from uneven cell thickness due to issues such as inconsistent cell sealing processes or varying bending and extrusion pressures during manufacturing, and lack a structure to detect cell thickness. Summary of the Invention
[0003] This application provides a display panel and display device that can determine the display panel cell thickness by detecting the distance between the corresponding pixels on the first substrate and the second substrate.
[0004] In a first aspect, this application provides a display panel, including a first substrate, a thickness detection unit, a pixel layer, and a second substrate stacked sequentially; the thickness detection unit includes a first circuit layer, a variable resistance bridge, and a second circuit layer stacked sequentially along the thickness direction of the display panel, the side of the first circuit layer away from the variable resistance bridge facing the first substrate, the side of the second circuit layer away from the variable resistance bridge facing the pixel layer, and the first circuit layer or the second circuit layer having a groove into which the variable resistance bridge can extend.
[0005] In one feasible approach, the pixel layer includes multiple pixels; the number of variable resistance bridges is multiple, the multiple variable resistance bridges are spaced apart, and each variable resistance bridge corresponds to at least one pixel; the variable resistance bridge is located on the side of the pixel corresponding to the variable resistance bridge that is away from the second substrate.
[0006] In one feasible approach, the groove is disposed on one side of the second circuit layer facing the variable resistance bridge. The variable resistance bridge includes a support post and a conductive medium. The support post has a through hole, the conductive medium passes through the through hole, and one end of the conductive medium is in contact with the first circuit layer. The other end of the conductive medium extends into the groove and is in contact with the sidewall of the groove.
[0007] In one feasible approach, the conductive medium protrudes from the surface of the support post away from the first circuit layer, and the size of the conductive medium protruding from the surface of the support post away from the first circuit layer is less than or equal to the size of the groove along the thickness direction of the display panel.
[0008] In one feasible approach, a groove is disposed on one side of the first circuit layer facing the variable resistance bridge. The variable resistance bridge includes a support post and a conductive medium. The support post has a through hole, the conductive medium passes through the through hole, and one end of the conductive medium contacts the second circuit layer. The other end of the conductive medium extends into the groove and contacts the sidewall of the groove.
[0009] In one feasible approach, the conductive medium protrudes from the surface of the support post away from the second circuit layer, and the size of the conductive medium protruding from the surface of the support post away from the second circuit layer is less than or equal to the size of the groove along the thickness direction of the display panel.
[0010] In one feasible embodiment, the display panel further includes a first insulating layer, a second insulating layer, and a switching circuit layer; the switching circuit layer is disposed on the side of the first substrate facing the thickness detection unit; the first insulating layer is disposed on the side of the switching circuit layer facing the thickness detection unit; and the second insulating layer is disposed on the side of the pixel layer facing the thickness detection unit. When the groove is disposed on the side of the second circuit layer facing the variable resistance bridge, the dimension of the second insulating layer along the thickness direction of the display panel is larger than the dimension of the groove along the thickness direction of the display panel; when the groove is disposed on the side of the first circuit layer facing the variable resistance bridge, the dimension of the first insulating layer along the thickness direction of the display panel is larger than the dimension of the groove along the thickness direction of the display panel.
[0011] In one feasible approach, a variable resistance bridge is used to measure the spacing between its corresponding pixel and the first substrate. Each pixel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the pixel is used to control the luminous intensity of the red sub-pixel, green sub-pixel, and blue sub-pixel respectively according to the spacing measured by its corresponding variable resistance bridge.
[0012] In one feasible approach, controlling the luminous intensity of the red, green, and blue sub-pixels based on the spacing measured by their corresponding variable resistance bridges includes: the spacing between the first and second substrates having a set value. When the spacing between the first and second substrates is the set value, the luminous intensity of the red sub-pixel is a first set brightness, the luminous intensity of the green sub-pixel is a second set brightness, and the luminous intensity of the blue sub-pixel is a third set brightness. When the spacing measured by the thickness detection unit is greater than the set value, the luminous intensity of the red sub-pixel is less than the first set brightness, the luminous intensity of the green sub-pixel is less than the second set brightness, and the luminous intensity of the blue sub-pixel is greater than or equal to the third set brightness. When the spacing measured by the thickness detection unit is less than the set value, the luminous intensity of the red sub-pixel is greater than or equal to the first set brightness, the luminous intensity of the green sub-pixel is greater than or equal to the second set brightness, and the luminous intensity of the blue sub-pixel is less than the third set brightness.
[0013] Secondly, this application also provides a display device, including a control circuit and a display panel as described in the first aspect, wherein the control circuit is electrically connected to a thickness detection unit and a pixel layer.
[0014] The display panel and display device provided in this application can detect the change in the spacing between the first substrate and the second substrate at the corresponding position of a pixel using a thickness detection unit, and determine the cell thickness at the corresponding position of the pixel based on the change in spacing. A variable resistance bridge in the thickness detection unit is electrically connected to the first circuit layer and the second circuit layer. The contact area between the variable resistance bridge and the groove disposed in the second circuit layer or the first circuit layer is different, resulting in different resistance values and different charge rates through the variable resistance bridge. The second circuit layer or the first circuit layer receives the charge rates of the variable resistance bridge between the first substrate and the second substrate corresponding to different pixels and transmits these charge rates to the control unit to detect the cell thickness of the display panel at that position, thereby improving the display quality of the display panel. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.
[0016] Figure 1 A schematic diagram of the structure of the display panel liquid crystal cell when the thickness is normal, as provided in this application;
[0017] Figure 2 A schematic diagram of the structure of the display panel liquid crystal cell provided in this application when the thickness is too high;
[0018] Figure 3 A schematic diagram of the structure of the display panel liquid crystal cell provided in this application when the thickness is relatively low;
[0019] Figure 4 A schematic diagram of another display panel provided in this application;
[0020] Figure 5 The control logic diagram of the display device provided in this application.
[0021] Attached image annotations:
[0022] 1-First substrate, 2-Thickness detection unit, 3-Pixel layer, 4-Second substrate, 5-Switch circuit layer, 6-First insulating layer; 7-Second insulating layer, 21-First circuit layer, 22-Variable resistance bridge, 23-Support pillar, 24-Conductive dielectric, 25-Second circuit layer; 31-Pixel, 32-Red sub-pixel, 33-Green sub-pixel, 34-Blue sub-pixel, 35-Light-shielding layer;
[0023] 81-Control circuit, 82-Display panel, 83-Scanning drive circuit, 84-Data drive circuit. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.
[0025] Please see Figure 1 This is a structural diagram of the display panel provided in this application. The display panel includes a first substrate 1, a switching circuit layer 5, a first insulating layer 6, a thickness detection unit 2, a second insulating layer 7, a pixel layer 3, and a second substrate 4, which are stacked sequentially. The switching circuit layer 5 is disposed on the side of the first substrate 1 facing the thickness detection unit 2; the first insulating layer 6 is disposed on the side of the switching circuit layer 5 facing the thickness detection unit 2; and the second insulating layer 7 is disposed on the side of the pixel layer 3 facing the thickness detection unit 2. The pixel layer 3 includes a plurality of pixels 31, and each pixel 31 includes a red sub-pixel 32, a green sub-pixel 33, and a blue sub-pixel 34. A light-shielding layer 35 is disposed between every two adjacent pixels 31 and between every two adjacent sub-pixels to distinguish the red, green, and blue light and the light of each pixel 31. In this application, the switching circuit layer 5 can be a TFT (Thin Film Transistor) for controlling the on / off state of current in the display panel; the first insulating layer 6 is used to protect the metal circuits in the underlying switching circuit layer 5 and fill the gaps between the metal circuit layers; the second insulating layer 7 is used to fill the gap between the pixel layer 3 and the thickness detection unit 2 and to prevent static electricity generation. When the thicknesses of the constituent media of the switching circuit layer, the first insulating layer, the first substrate, the second substrate, and the thickness detection unit itself are fixed, the thickness detection unit determines the cell thickness of the display panel at the corresponding pixel position by detecting the change in the distance between the first substrate and the second substrate at the corresponding pixel position.
[0026] The thickness detection unit 2 includes a first circuit layer 21, a variable resistance bridge 22, and a second circuit layer 25 arranged sequentially along the thickness direction of the display panel. The side of the first circuit layer 21 away from the variable resistance bridge 22 faces the first substrate 1, and the side of the second circuit layer 25 away from the variable resistance bridge 22 faces the pixel layer 3. There are multiple variable resistance bridges 22, spaced apart, with each variable resistance bridge 22 corresponding to at least one pixel 31. The variable resistance bridge 22 is located on the side of the pixel 31 corresponding to it that faces away from the second substrate 4. Each variable resistance bridge 22 can detect the distance between the first and second substrates at the location corresponding to at least one pixel 31. The second circuit layer 25 has a groove into which the variable resistance bridge 22 can move, and the groove is located on the side of the second circuit layer 25 facing the variable resistance bridge 22.
[0027] The display panel and display device provided in this application can not only monitor the distance between the first substrate and the second substrate at the corresponding position of the corresponding pixel, but also adjust the light emission brightness of the corresponding pixel according to the distance, so as to improve the problem of yellowing or bluish discoloration of the display panel caused by uneven cell thickness. In this application, the first circuit layer 21 can be indium tin oxide (ITO) as a signal input layer; the second circuit layer 25 can be indium tin oxide (ITO) as a signal receiving output layer; the first circuit layer 21 is connected to the switching circuit layer 5 through a metal wire, and the electrical signal transmitted from the switching circuit layer 5 is transmitted to the second circuit layer 25 through the variable resistance bridge 22. After receiving the electrical signal, the second circuit layer 25 transmits the electrical signal to the control circuit through the metal wire, and then the control circuit adjusts the light emission brightness of the pixel 31 in the pixel layer 3 according to the change of the electrical signal. Each variable resistance bridge 22 corresponds to at least one pixel 31. By detecting the change of resistance value of the variable resistance bridge 22 at the corresponding position of the corresponding pixel 31, the thickness of the liquid crystal cell of the display panel at that position is determined, and the brightness of the corresponding pixel 31 is adjusted by the control unit. The variable resistance bridge 22 is movably connected to the second circuit layer 25. The resistance value of the variable resistance bridge 22 depends on the contact area between the variable resistance bridge 22 and the groove provided on the second circuit layer 25 facing the variable resistance bridge 22. An increase in the contact area decreases the resistance of the variable resistance bridge 22, increasing the speed at which the electrical signal passes through it; conversely, a decrease in the contact area increases the resistance of the variable resistance bridge 22, decreasing the speed at which the electrical signal passes through it. The second circuit layer 25 receives the electrical signal information at the corresponding position of the corresponding pixel 31, transmits it back to the control circuit, and then the control circuit adjusts the brightness of the corresponding pixel 31 according to the design.
[0028] The variable resistance bridge 22 includes a support post 23 and a conductive medium 24. The support post 23 has a through hole, through which the conductive medium 24 protrudes and extends from the surface of the support post 23 away from the first circuit layer 21. One end of the conductive medium 24 contacts the first circuit layer 21, and the end of the conductive medium 24 protruding from the support post 23 away from the first circuit layer 21 extends into a groove and contacts the sidewall of the groove. The surface dimension of the conductive medium 24 is less than or equal to the dimension of the groove along the thickness direction of the display panel. In this application, the support post 23 can be an organic photolithography material with a certain elastic recovery capability, used to support the first circuit layer 21 and the second circuit layer 25. The conductive medium 24 is a metal or semiconductor medium with conductive properties, such as graphene, gold, or silver, used to transmit electrical signals between the first circuit layer 21 and the second circuit layer 25.
[0029] The distance between the first substrate 1 and the second substrate 4 has a set value. Under this set value, the display panel displays white light. When the distance between the first substrate 1 and the second substrate 4 is the set value, the luminance of the red sub-pixel 32 is the first set luminance, the luminance of the green sub-pixel 33 is the second set luminance, and the luminance of the blue sub-pixel 34 is the third set luminance. The white light displayed by the display panel is a mixture of red, green, and blue primary colors. However, because the transmittance of the green sub-pixel 33 is higher than that of the red sub-pixel 32, and the transmittance of the red sub-pixel 32 is higher than that of the blue sub-pixel 34 (e.g., green:red:blue = 8:3:1), under the already designed optics, assuming the white light is normal, if other conditions remain unchanged, and the distance between the first substrate 1 and the second substrate 4 is greater than the set value, the ratio of green light transmitted by the green sub-pixel 33 to red light transmitted by the red sub-pixel 32 is much greater than the ratio of blue light transmitted by the blue sub-pixel 34. This results in an imbalance of the red, green, and blue ratios, causing the white light to lean towards yellow (green and red light mix to form yellow light), resulting in a yellowish appearance of the panel. Similarly, when the distance between the first substrate 1 and the second substrate 4 is less than a set value, the ratio of green and red light transmission is much smaller than the ratio of blue light transmission, resulting in an imbalance in the red-green-blue ratio. This causes white light to lean towards blue light (green and red light decrease, while blue light increases in the mixing ratio, causing the panel to appear bluish). In this application, the distance between the first substrate 1 and the second substrate 4 is compared with a set value, and the luminous brightness of the red sub-pixel 32, green sub-pixel 33, and blue sub-pixel 34 in the corresponding pixel 31 is adjusted, thus solving the problem of yellowing or bluish discoloration of the display panel caused by uneven cell thickness.
[0030] Please see Figure 2 , Figure 2 When the distance between the first substrate 1 and the second substrate 4 is greater than a set value, that is, the distance measured by the thickness detection unit 2 is greater than the set value, the contact area between the conductive medium 24 and the sidewall of the groove is reduced, the resistance of the variable resistance bridge 22 is increased, and the passage speed of the electrical signal through the variable resistance bridge 22 is reduced. The second circuit layer 25 receives the electrical signal with reduced passage speed and transmits the electrical signal with reduced passage speed to the control circuit. The control circuit transmits the electrical signal that adjusts the light emission brightness of the pixel 31 to the pixel layer 3 through the metal wire, so that the light emission brightness of the red sub-pixel 32 is less than the first set brightness, the light emission brightness of the green sub-pixel 33 is less than the second set brightness, and the light emission brightness of the blue sub-pixel 34 is greater than or equal to the third set brightness.
[0031] Please see Figure 3 , Figure 3When the distance between the first substrate 1 and the second substrate 4 is less than a set value, that is, the distance measured by the thickness detection unit 2 is less than the set value, the contact area between the conductive medium 24 and the sidewall of the groove increases, the resistance of the variable resistance bridge 22 decreases, and the transmission speed of the electrical signal through the variable resistance bridge 22 increases. The second circuit layer 25 receives the electrical signal with the increased transmission speed and transmits the electrical signal with the increased transmission speed to the control circuit, so that the light emission brightness of the red sub-pixel 32 is greater than or equal to the first set brightness, the light emission brightness of the green sub-pixel 33 is greater than or equal to the second set brightness, and the light emission brightness of the blue sub-pixel 34 is less than the third set brightness.
[0032] When the groove is provided on the side of the second circuit layer 25 facing the variable resistance bridge 22, the dimension of the second insulating layer 7 along the thickness direction of the display panel is larger than the dimension of the groove along the thickness direction of the display panel. This ensures that the second insulating layer 7 has sufficient thickness to accommodate the groove of the second circuit layer 25.
[0033] Please see Figure 4 , Figure 4 This application describes the case where the recess in the display panel is located on the side of the first circuit layer 21 facing the variable resistance bridge 22. In this case, the first circuit layer 21 is a signal receiving and output layer, and the second circuit layer 25 is a signal input layer. The second circuit layer 25 is connected to the switching circuit layer 5 via a metal wire, transmitting the electrical signal from the switching circuit layer 5 to the first circuit layer 21 via the variable resistance bridge 22. After receiving the electrical signal, the first circuit layer 21 transmits the signal to the control circuit via the metal wire. The control circuit then adjusts the brightness of the pixels 31 in the pixel layer 3 according to the changes in the electrical signal. Each variable resistance bridge 22 corresponds to at least one pixel 31. By detecting the change in resistance of the variable resistance bridge 22 at the corresponding position of the pixel 31, the thickness of the liquid crystal cell of the display panel at that position is determined, and the brightness of the corresponding pixel 31 is adjusted by the control unit. The variable resistance bridge 22 is movably connected to the first circuit layer 21. The resistance of the variable resistance bridge 22 depends on the contact area between the variable resistance bridge 22 and the groove on the first circuit layer 21 facing the variable resistance bridge 22. An increase in the contact area decreases the resistance of the variable resistance bridge 22, increasing the speed at which electrical signals pass through it; conversely, a decrease in the contact area increases the resistance of the variable resistance bridge 22, decreasing the speed at which electrical signals pass through it. The first circuit layer 21 receives electrical signal information from the corresponding position of the corresponding pixel 31 and transmits it back to the control circuit, which then adjusts the brightness of the corresponding pixel 31 according to the design. The variable resistance bridge 22 includes a support post 23 and a conductive medium 24. The support post 23 has a through-hole, through which the conductive medium 24 protrudes and extends from the surface of the support post 23 away from the first circuit layer 21. One end of the conductive medium 24 contacts the second circuit layer 25, and the protruding end of the conductive medium 24 extends into the groove and contacts the sidewall of the groove.
[0034] When the distance between the first substrate 1 and the second substrate 4 is greater than the set value, the distance measured by the thickness detection unit 2 is greater than the set value. At this time, the contact area between the conductive medium 24 and the sidewall of the groove is reduced, the resistance of the variable resistance bridge 22 is increased, and the transmission speed of the electrical signal through the variable resistance bridge 22 is reduced. The first circuit layer 21 receives the electrical signal with reduced transmission speed and transmits the electrical signal with reduced transmission speed to the control circuit. The control circuit transmits the electrical signal that adjusts the light emission brightness of the pixel 31 to the pixel layer 3 through the metal wire, so that the light emission brightness of the red sub-pixel 32 is less than the first set brightness, the light emission brightness of the green sub-pixel 33 is less than the second set brightness, and the light emission brightness of the blue sub-pixel 34 is greater than or equal to the third set brightness.
[0035] When the distance between the first substrate 1 and the second substrate 4 is less than the set value, the distance measured by the thickness detection unit 2 is less than the set value. At this time, the contact area between the conductive medium 24 and the sidewall of the groove increases, the resistance of the variable resistance bridge 22 decreases, and the transmission speed of the electrical signal through the variable resistance bridge 22 increases. The first circuit layer 21 receives the electrical signal with the increased transmission speed and transmits the electrical signal with the increased transmission speed to the control circuit, so that the light emission brightness of the red sub-pixel 32 is greater than or equal to the first set brightness, the light emission brightness of the green sub-pixel 33 is greater than or equal to the second set brightness, and the light emission brightness of the blue sub-pixel 34 is less than the third set brightness.
[0036] When the groove is located on the side of the first circuit layer 21 facing the variable resistance bridge 22, the dimension of the first insulating layer 6 along the thickness direction of the display panel is larger than the dimension of the groove along the thickness direction of the display panel. This ensures that the first insulating layer 6 has sufficient thickness to accommodate the groove of the first circuit layer 21.
[0037] Please see Figure 5 , Figure 5 This is a control logic diagram of the display device provided in this application. The control circuit 81 is responsible for controlling the switching on and off of the display panel 82 and adjusting the brightness of the pixels 31. After the control circuit 81 transmits the control signal to the scanning drive circuit 83, the scanning drive circuit 83 scans and detects the working state of the display panel 82, and turns on the display panel 82 through the switching circuit layer 5. The control unit simultaneously transmits signals from the first circuit layer 21 to the first circuit layer 21 to control the electrical signals transmitted from the first circuit layer 21 to the second circuit layer 25. After the thickness unit in the display panel 82 detects a change in the speed of the electrical signal passing through the variable resistance bridge 22, it transmits the signal indicating this speed change to the control circuit 81 through the second circuit layer 25. After analyzing the signal from the second circuit layer 25, the control circuit 81 transmits the pixel 31 brightness adjustment signal to the pixel layer 3 in the display panel 82 through the data drive circuit 84 to adjust the brightness of the pixels in the pixel layer 3.
[0038] The pixel layer 3 of the display panel 82 has multiple pixels 31, each pixel 31 including a red sub-pixel 32, a green sub-pixel 33, and a blue sub-pixel 34. The spacing between the first substrate 1 and the second substrate 4 of the display panel 82 has a set value. When the spacing between the first substrate 1 and the second substrate 4 is the set value, the luminance of the red sub-pixel 32 is a first set luminance, the luminance of the green sub-pixel 33 is a second set luminance, and the luminance of the blue sub-pixel 34 is a third set luminance. When the spacing measured by the thickness detection unit 2 is greater than the set value, the transmission speed of the electrical signal through the variable resistance bridge 22 decreases. The second circuit layer 25 receives the electrical signal indicating the decrease in transmission speed and transmits it to the control circuit 81. The control circuit 81 transmits an electrical signal adjusting the luminance of the pixel 31 to the pixel layer 3 through the data drive circuit 84, so that the luminance of the red sub-pixel 32 is less than the first set luminance, the luminance of the green sub-pixel 33 is less than the second set luminance, and the luminance of the blue sub-pixel 34 is greater than or equal to the third set luminance. When the spacing measured by the thickness detection unit 2 is less than the set value, the speed of the electrical signal passing through the variable resistance bridge 22 increases. The second circuit layer 25 receives the electrical signal with the increased speed and transmits it to the control circuit 81. The control circuit 81 transmits the electrical signal that adjusts the brightness of the pixel 31 to the pixel layer 3 through the data driving circuit 84, so that the brightness of the red sub-pixel 32 is greater than or equal to the first set brightness, the brightness of the green sub-pixel 33 is greater than or equal to the second set brightness, and the brightness of the blue sub-pixel 34 is less than the third set brightness.
[0039] The display panel and display device provided in this application detect the thickness variation of the upper and lower substrates of the liquid crystal cell using a thickness detection unit, and adjust the brightness of each pixel in the pixel layer accordingly based on the thickness variation. A variable resistance bridge in the thickness detection unit electrically connects the first and second circuit layers. Different contact areas between the variable resistance bridge and the second circuit layer correspond to different resistance values and different charge rates passing through the bridge. The second circuit layer receives the charge rates between the first and second substrates corresponding to different pixels and transmits these rates to the control unit. After analyzing the charge rates, the control unit transmits brightness adjustment signals to the pixel layer, causing the corresponding pixels to adjust their brightness. This improves the image quality problem caused by uneven cell thickness and enhances the display quality of the display panel.
[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0041] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0042] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0043] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.
[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A display panel, characterized in that, It includes a first substrate, a thickness detection unit, a pixel layer, and a second substrate that are stacked sequentially. The thickness detection unit includes a first circuit layer, a variable resistance bridge, and a second circuit layer arranged sequentially along the thickness direction of the display panel. The side of the first circuit layer away from the variable resistance bridge faces the first substrate, and the side of the second circuit layer away from the variable resistance bridge faces the pixel layer. The first circuit layer or the second circuit layer has a groove into which the variable resistance bridge can extend.
2. The display panel as described in claim 1, characterized in that, The pixel layer includes multiple pixels; The number of variable resistance bridges is multiple, and the multiple variable resistance bridges are arranged at intervals. Each variable resistance bridge corresponds to at least one pixel. The variable resistance bridge is located on the side of the pixel corresponding to the variable resistance bridge that is away from the second substrate.
3. The display panel as described in claim 1, characterized in that, The groove is disposed on the side of the second circuit layer facing the variable resistance bridge. The variable resistance bridge includes a support post and a conductive medium. The support post has a through hole, the conductive medium passes through the through hole, and one end of the conductive medium is in contact with the first circuit layer. The other end of the conductive medium extends into the groove and is in contact with the side wall of the groove.
4. The display panel as described in claim 3, characterized in that, The conductive medium protrudes from the surface of the support post away from the first circuit layer, and the size of the conductive medium protruding from the surface of the support post away from the first circuit layer is less than or equal to the size of the groove along the thickness direction of the display panel.
5. The display panel as described in claim 1, characterized in that, The groove is disposed on the side of the first circuit layer facing the variable resistance bridge. The variable resistance bridge includes a support post and a conductive medium. The support post has a through hole, the conductive medium passes through the through hole, and one end of the conductive medium is in contact with the second circuit layer. The other end of the conductive medium extends into the groove and is in contact with the side wall of the groove.
6. The display panel as described in claim 5, characterized in that, The conductive medium protrudes from the surface of the support post away from the second circuit layer, and the size of the conductive medium protruding from the surface of the support post away from the second circuit layer is less than or equal to the size of the groove along the thickness direction of the display panel.
7. The display panel as described in claim 1, characterized in that, The display panel further includes a first insulating layer, a second insulating layer, and a switching circuit layer; The switching circuit layer is disposed on the side of the first substrate facing the thickness detection unit; the first insulating layer is disposed on the side of the switching circuit layer facing the thickness detection unit; the second insulating layer is disposed on the side of the pixel layer facing the thickness detection unit. When the groove is disposed on the side of the second circuit layer facing the variable resistance bridge, the dimension of the second insulating layer along the thickness direction of the display panel is larger than the dimension of the groove along the thickness direction of the display panel; When the groove is disposed on the side of the first circuit layer facing the variable resistance bridge, the dimension of the first insulating layer along the thickness direction of the display panel is larger than the dimension of the groove along the thickness direction of the display panel.
8. The display panel as described in claim 2, characterized in that, The variable resistance bridge is used to measure the spacing between its corresponding pixel and the first substrate; Each pixel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the pixel is used to control the luminous brightness of the red sub-pixel, the green sub-pixel, and the blue sub-pixel respectively according to the spacing measured by the corresponding variable resistance bridge.
9. The display panel according to claim 8, characterized in that, The step of controlling the luminous intensity of the red sub-pixel, the green sub-pixel, and the blue sub-pixel respectively based on the spacing measured by the corresponding variable resistance bridge includes: The spacing between the first substrate and the second substrate has a set value; When the distance between the first substrate and the second substrate is a set value, the luminous brightness of the red sub-pixel is a first set brightness, the luminous brightness of the green sub-pixel is a second set brightness, and the luminous brightness of the blue sub-pixel is a third set brightness. When the spacing measured by the thickness detection unit is greater than a set value, the luminance of the red sub-pixel is less than the first set luminance, the luminance of the green sub-pixel is less than the second set luminance, and the luminance of the blue sub-pixel is greater than or equal to the third set luminance. When the spacing measured by the thickness detection unit is less than a set value, the luminance of the red sub-pixel is greater than or equal to the first set luminance, the luminance of the green sub-pixel is greater than or equal to the second set luminance, and the luminance of the blue sub-pixel is less than the third set luminance.
10. A display device, characterized in that, It includes a control circuit and a display panel as claimed in any one of claims 1-9, wherein the control circuit is electrically connected to the thickness detection unit and the pixel layer.