Display panel, design method thereof, and display device

Abstract

The embodiments of the present application provide a display panel, a design method thereof, and a display device, which relate to the field of display technology. The color film substrate of the display panel includes a retaining wall, which is intended to ensure the transmittance of the display panel, and effectively reduce the risk of cross-color by physically blocking the cross-color light path, thereby improving the precision requirements of the alignment process for the cross-color problem. In the design method of the display panel, the alignment offset value can be pre-set according to the level of the process and equipment, and the spatial color difference of the main pixel can be calculated according to the height value of the retaining wall. When the color difference is greater than the threshold, the height value of the retaining wall is adjusted until the color difference is less than or equal to the threshold. This method can form the same effect as adjusting the alignment offset value or increasing the width of the black matrix by adjusting the height value of the retaining wall, which not only ensures the transmittance of the display panel, but also realizes the reasonable design of the height of the retaining wall, which is conducive to reducing costs and avoiding waste, and can also avoid the retaining wall being too high to affect the display effect.

Description

Technical Field

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

[0002] Currently, display panel product development is trending towards higher pixel density, pushing pixel design to its limits. Pixel sizes are shrinking, and the proportion of color crosstalk is increasing under the same alignment conditions. To avoid color crosstalk, transmittance must be sacrificed or alignment accuracy must be improved, significantly increasing the control requirements for production equipment and process. Summary of the Invention

[0003] The present application proposes a design method for a display panel, aiming to effectively reduce the risk of cross-color while ensuring the transmittance of the display panel, improve the precision requirements of the alignment process for the cross-color problem, and improve the display quality of the display panel.

[0004] The display panel design method includes the following steps L01 to L06:

[0005] L01: Calculate the first light effect of the main pixel of the display panel, where the first light effect is the light effect when the array substrate and the color filter substrate are aligned without shifting.

[0006] L02: Set the alignment offset value between the array substrate and the color filter substrate.

[0007] L03: Calculating a second light effect of the main pixel of the display panel according to the alignment offset value, where the second light effect is a light effect when the array substrate and the color filter substrate are aligned with each other.

[0008] L04: Calculate the third light effect of the adjacent pixels of the main pixel based on the height value of the retaining wall on the color filter substrate. The retaining wall is set between the main pixel and the adjacent pixel. The third light effect is the light effect of the adjacent pixel on the main pixel when the array substrate and the color filter substrate are offset.

[0009] L05: Calculate the spatial color difference of the main pixel according to the first light effect, the second light effect, and the third light effect.

[0010] L06: When the color difference is greater than the threshold, adjust the height of the retaining wall until the color difference is less than or equal to the threshold.

[0011] In some embodiments, the design method further includes: obtaining a light efficiency curve of the display panel.

[0012] Calculating the first light effect of the main pixel of the display panel includes: determining a first integral interval when the main pixel is aligned without shifting; and simulating the first integral interval according to a light effect curve of the display panel to obtain the first light effect.

[0013] In some embodiments, the design method further includes: obtaining a light efficiency curve of the display panel.

[0014] Calculating the second light effect of the main pixel of the display panel includes: determining a second integral interval of the main pixel in a case of alignment shift; and simulating the second integral interval according to a light effect curve of the display panel to obtain the second light effect.

[0015] In some embodiments, the design method further includes: obtaining a light efficiency curve of the display panel, and fitting to obtain a curve equation of the light efficiency curve.

[0016] Calculating the third light effect of the adjacent pixels of the main pixel includes: determining a third integral interval in which the adjacent pixels affect the main pixel; substituting the third integral interval into the curve equation for integration to obtain the third light effect.

[0017] In some embodiments, determining the third integral interval in which the adjacent pixels affect the main pixel includes: calculating the upper limit value of the third integral interval based on the height value of the retaining wall, the width of the black matrix between the main pixel and the adjacent pixels, the box spacing and the alignment offset value between the array substrate and the color film substrate.

[0018] In some embodiments, the height of the retaining wall is h, the width of the black matrix between the main pixel and the adjacent pixel is B, the cell spacing between the array substrate and the color filter substrate is G, the alignment offset value is Δx, and the upper limit of the third integral interval is

[0019]

[0020] In some embodiments, Then there is

[0021] In some embodiments, according to a reference integral interval in which adjacent pixels affect the main pixel, a light efficiency curve of the display panel in the reference integral interval is obtained, and a curve equation of the light efficiency curve is obtained by fitting.

[0022] In some embodiments, the alignment offset value is set according to the alignment process and alignment equipment of the array substrate and the color filter substrate.

[0023] In a second aspect, the present application also provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are run on a computer, the computer executes the design method mentioned in any embodiment mentioned in the first aspect above.

[0024] In a third aspect, the present application also provides a computer program product, which includes computer program instructions. When the computer program instructions are executed on a computer, the computer program instructions enable the computer to execute the design method mentioned in any embodiment mentioned in the first aspect above.

[0025] In a fourth aspect, the present application further provides a display panel comprising an array substrate and a color filter substrate arranged relative to each other, wherein the color filter substrate comprises a substrate, a black matrix, a plurality of color resist layers, and a retaining wall. The black matrix is ​​arranged on a side of the substrate close to the array substrate, the black matrix comprises a plurality of openings, and a color resist layer is arranged in one opening. The retaining wall is arranged on a side of the black matrix close to the array substrate, and the orthographic projection of the retaining wall on the substrate is located between the orthographic projections of two adjacent openings on the substrate. In a direction perpendicular to the substrate, the height of the retaining wall is determined by the design method mentioned in any embodiment mentioned in the first aspect above.

[0026] In some embodiments, the retaining wall and the black matrix are made of the same material.

[0027] In a fifth aspect, the present application further provides a display device comprising the display panel mentioned in any embodiment of the fourth aspect, and a backlight module, wherein the backlight module is arranged on a side of the array substrate of the display panel away from the color film substrate.

[0028] In an embodiment of the present application, the display panel includes an array substrate and a color filter substrate arranged relative to each other, and the color filter substrate includes a substrate, a black matrix, a plurality of color resist layers, and a retaining wall. The black matrix is ​​arranged on the side of the substrate close to the array substrate, and the black matrix includes a plurality of openings, and a color resist layer is arranged in one opening. The retaining wall is arranged on the side of the black matrix close to the array substrate, and the orthographic projection of the retaining wall on the substrate is located between the orthographic projections of two adjacent openings on the substrate. By providing the retaining wall, the risk of cross-color can be effectively reduced by physically blocking the cross-color light path while ensuring the transmittance of the display panel, thereby improving the precision requirements of the alignment process for the cross-color problem.

[0029] In a display panel design method, the alignment offset value between the array substrate and the color filter substrate can be pre-set based on the process and equipment level. The spatial color difference of the main pixel can be calculated based on the height of the retaining wall on the color filter substrate. If the color difference exceeds a threshold, the height of the retaining wall is adjusted until the color difference is less than or equal to the threshold. This method, by adjusting the height of the retaining wall, achieves the same effect as adjusting the alignment offset value or increasing the black matrix width. This method not only ensures the transmittance of the display panel but also allows for a reasonable design of the retaining wall height, reducing costs, avoiding waste, and preventing the display effect from being affected by excessive retaining wall height.

[0030] The above-mentioned display device has the same structure and beneficial technical effects as the display panels provided in some of the above-mentioned embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions of this application, the following briefly introduces the drawings required for use in some embodiments of this application. Obviously, the drawings described below are only drawings of some embodiments of this application. For those skilled in the art, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and do not represent the actual dimensions of the products or the actual processes of the methods involved in the embodiments of this application.

[0032] Figure 1 This is a cross-color viewing angle optical path diagram under normal alignment conditions;

[0033] Figure 2 This is a cross-color viewing angle optical path diagram under the condition of offset;

[0034] Figure 3 A schematic diagram of a display panel design method provided in an embodiment of the present application;

[0035] Figure 4 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0036] Figure 5 for Figure 4 An equivalent simplified schematic diagram of the display panel shown;

[0037] Figure 6 A schematic diagram of a structure of a display panel alignment offset provided in an embodiment of the present application;

[0038] Figure 7 for Figure 6 Equivalent simplified schematic diagram of the display panel shown

[0039] Figure 8 A simulated light effect curve diagram provided in an embodiment of the present application;

[0040] Figure 9 A simulated light efficiency curve diagram of a reference integral interval provided in an embodiment of the present application;

[0041] Figure 10 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the embodiments described are only some embodiments of the present application, not all embodiments. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0043] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, that is, meaning "including, but not limited to."

[0044] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0045] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed connection, detachable connection, or integration; it can be directly connected or indirectly connected through an intermediate medium. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other.

[0046] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0047] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0048] Exemplary embodiments are described herein with reference to cross-sectional views that are idealized exemplary drawings. In the drawings, the thickness of layers and the areas of regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0049] As mentioned in the background technology, as the pixel density of display panels increases, pixel design tends to its limit. The reduction in pixel size, the finer conductive layer width and narrower black matrix width within the pixel, and the higher alignment accuracy requirements increase the risk of color crosstalk in the display panel.

[0050] Conventional color crosstalk determination methods generally refer to observing at a 60° viewing angle and finding that, under a certain lighting screen, the display area is partially or entirely mixed with other colors, resulting in abnormal display. Figure 1 and Figure 2 As shown, Figure 1 This is a cross-color viewing angle optical path diagram under normal alignment conditions. Figure 2 This is a cross-color viewing angle optical path diagram under the condition of offset.

[0051] Taking a liquid crystal display panel as an example, the display panel includes an array substrate 1, a color filter substrate 2, and a liquid crystal layer 3. The color filter substrate 2 includes a black matrix 21 and multiple color resist layers 22. The multiple color resist layers 22 include a red sub-pixel color resist layer 221, a green sub-pixel color resist layer 222, and a blue sub-pixel color resist layer 223. The multiple color resist layers 22 are disposed within multiple openings of the black matrix 21. Assuming that the display panel only illuminates the red image, that is, the liquid crystal in the liquid crystal layer 3 directly below the red sub-pixel color resist layer 221 is deflected, allowing polarized light to pass through the red sub-pixel color resist layer 221 and be observed.

[0052] by Figure 1 or Figure 2 For example, if, under the cross-color inspection viewing angle, the liquid crystal in liquid crystal layer 3 directly below the red sub-pixel color filter layer 221 deflects, allowing polarized light to pass through the adjacent blue sub-pixel color filter layer 223, and the color difference reaches a level discernible to the human eye, the display panel is determined to have a cross-color problem. Under the cross-color inspection viewing angle, the light observed by the human eye is a mixture of red and blue colors. The degree of color mixing is affected by the full-pixel light effect. The higher the light effect at the pixel edge, the higher the degree of cross-color, and the greater the cross-color risk.

[0053] In order to avoid the problem of poor display, the related art adopts methods such as increasing the width of the black matrix 21 or reducing the cell thickness G of the display panel. However, these methods will affect the transmittance of the display panel.

[0054] To solve the above problems, the present application proposes a display panel and a design method thereof, which can effectively reduce the risk of cross-color and improve the image display quality by physically blocking the cross-color light path.

[0055] like Figure 3 As shown, Figure 3 A schematic diagram of a display panel design method provided in an embodiment of the present application is shown. Figure 4 A schematic structural diagram of a display panel provided in an embodiment of the present application.

[0056] The display panel includes an array substrate 1 and a color filter substrate 2, which are arranged relative to each other. The color filter substrate 2 includes a substrate 20, a black matrix 21, multiple color resist layers 22, and retaining walls 23. The black matrix 21 is disposed on the side of the substrate 20 closest to the array substrate 1. The black matrix 21 includes multiple openings V1, with one color resist layer 22 disposed within each opening V1. The retaining walls 23 are disposed on the side of the black matrix 21 closest to the array substrate 1. The orthographic projection of the retaining wall 23 on the substrate 20 is located between the orthographic projections of two adjacent openings V1 on the substrate 20.

[0057] The design method of the display panel 10 includes the following steps L01 to L06:

[0058] L01: Calculate the first light effect A of the main pixel M1 of the display panel 10. The first light effect A is the light effect when the array substrate 1 and the color filter substrate 2 are aligned without shifting.

[0059] The main pixel M1 here is the sub-pixel of the color corresponding to the detected image during the cross-color detection process. Figure 4 As shown, the display panel 10 includes a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B. During the cross-color detection process of the red image of the display panel 10, the red sub-pixel R is the main pixel M1 in this process, and the green sub-pixel G or the blue sub-pixel B corresponds to the adjacent pixel M2 of the main pixel M1.

[0060] Figure 4 The figure shows that the array substrate 1 and the color filter substrate 2 are aligned without offset. For easier understanding and explanation of the cross-color problem, please refer to Figure 5 , Figure 5 for Figure 4 An equivalent simplified schematic diagram of the display panel is shown.

[0061] The array substrate 1 includes a conductive layer 11, which is arranged opposite to the black matrix 21. Figure 4 Taking the black matrix 21 and the conductive layer 11 at a certain point on the XY plane as an example, the array substrate 1 and the color filter substrate 2 are aligned without offset, that is, a coordinate system is established with the center of the conductive layer 11 as the zero point, and the center of the black matrix 21 is located on the Y axis.

[0062] L02: Setting the alignment offset value Δx between the array substrate 1 and the color filter substrate 2 .

[0063] For example, in some embodiments, the alignment offset value Δx may be set according to the alignment process and alignment equipment of the array substrate 1 and the color filter substrate 2 .

[0064] like Figure 6 As shown, Figure 6 This is a schematic diagram of a structure of a display panel alignment offset provided by an embodiment of the present application. Figure 7 for Figure 6 The equivalent simplified schematic diagram of the display panel is shown. Figure 4 Compared to the display panel shown, Figure 6 The display panel shown is equivalent to the color filter substrate 2 being offset to the right by Δx relative to the array substrate 1 .

[0065] L03 : Calculating a second light effect B of the main pixel M1 of the display panel 10 according to the alignment offset value Δx. The second light effect B is a light effect when the array substrate 1 and the color filter substrate 2 are aligned and offset.

[0066] For example, combined with Figure 6 As shown, the main pixel M1 is a red sub-pixel R, the adjacent pixel M2 is a blue sub-pixel B, and the second light effect B is the light effect of the red sub-pixel R when the color filter substrate 2 is offset to the right by Δx relative to the array substrate 1 .

[0067] L04: Calculate the third light effect C of the adjacent pixel M2 of the main pixel M1 based on the height h of the retaining wall 23 on the color filter substrate 2. The retaining wall 23 is arranged between the main pixel M1 and the adjacent pixel M2. The third light effect C is the light effect of the adjacent pixel M2 affecting the main pixel M1 when the array substrate 1 and the color filter substrate 2 are offset. That is, when only the main pixel M1 is lit, after the liquid crystal directly below the color resist layer of the main pixel M1 is deflected, part of the polarized light can pass through the color resist layer of the adjacent pixel M2, thereby affecting the displayed image.

[0068] For example, combined with Figure 6 As shown, the main pixel M1 is a red sub-pixel R, and the adjacent pixel M2 is a blue sub-pixel B. The third light effect C is the edge light effect when the color filter substrate 2 is offset to the right by Δx relative to the array substrate 1, and when only the red sub-pixel R is turned on, the polarized light corresponding to the red sub-pixel R passes through the color resist layer of the blue sub-pixel B.

[0069] L05: Calculate the spatial color difference ΔE of the main pixel M1 according to the first light effect A, the second light effect B, and the third light effect C.

[0070] The spatial color difference ΔE here can be calculated according to the CIE standard.

[0071] L06: When the color difference ΔE is greater than the threshold, adjust the height h of the retaining wall 23 until the color difference ΔE is less than or equal to the threshold.

[0072] The threshold value here can be determined based on empirical values, and may be different for different products or when different colors are mixed in the same picture.

[0073] Combine Figure 4 and Figure 6 It can be understood that both the alignment offset value Δx and the height h of the retaining wall 23 will affect the risk of cross-color.

[0074] In the related art, the display panel is not provided with a retaining wall 23 (equivalent to the height h of the retaining wall 23 being 0), and the cross-color simulation method is: continuously setting the alignment offset value Δx to calculate the first light effect A, the second light effect B, and the third light effect C as well as the color difference ΔE. When the color difference ΔE is greater than the threshold, the alignment offset value Δx is adjusted until the color difference ΔE is less than or equal to the threshold. This calculation process is relatively cumbersome, and it is necessary to continuously set the alignment offset value Δx to calculate the light effect and color difference ΔE, that is, it is necessary to gradually approach the boundary value of the alignment offset value Δx through multiple calculations. Moreover, in special cases, in order to avoid cross-color problems, some products have higher requirements for the alignment offset value Δx. Once the requirements cannot be met, the pixel design must be modified to avoid cross-color problems by sacrificing parameters such as transmittance. For example, the inventors of the present application found that, in conventional designs, based on simulation calculations, the alignment accuracy needs to satisfy the alignment offset value Δx≤±1.8μm to avoid the risk of cross-color. However, this accuracy requirement exceeds the limit of process capabilities and cannot be achieved in practice. In order to avoid cross-color, in principle, the method of increasing the width of the black matrix 21 can be adopted, but this will reduce the transmittance of the sub-pixel.

[0075] The method proposed in this embodiment does not require changing the pixel design. The alignment offset value Δx can be pre-set based on the process and equipment level. By adjusting the height h of the retaining wall 23, the same effect as adjusting the alignment offset value Δx or increasing the width of the black matrix 21 can be achieved. That is, the retaining wall 23 is used to block the direction of the cross-color light path. Under the cross-color viewing angle, the possibility of polarized light in the liquid crystal layer directly below the color filter layer of the main pixel M1 after deflection is reduced from passing through the color filter layer of the adjacent pixel M2. In addition, this method is conducive to achieving a reasonable design of the retaining wall 23. For example, for a general display panel, when the retaining wall 23 is not required (that is, the height h of the retaining wall 23 is 0) and the cross-color problem can be avoided, the display panel can be provided with no retaining wall 23, which is conducive to reducing costs and avoiding waste. Alternatively, for some display panels with high pixel density or high light transmittance requirements, this method can achieve a reasonable design of the height of the retaining wall 23, which can avoid the retaining wall 23 being too small to effectively block the cross-color light path, and also avoid the retaining wall 23 being too high, which may cause the support box thickness to potentially affect the display panel.

[0076] Based on this, this method can not only effectively reduce the risk of color crosstalk, but also improve the accuracy requirements of the alignment process for the color crosstalk problem, and can also ensure the transmittance of the display panel.

[0077] In some embodiments, the design method further includes: obtaining a light effect curve of the display panel 10, for example, by software simulation, and in some embodiments, fitting the light effect curve equation y=f(x).

[0078] For example, Figure 8 As shown, Figure 8 This is a simulated light effect curve diagram provided by an embodiment of the present application, wherein the ordinate represents transmittance and the abscissa represents position coordinates.

[0079] In some embodiments, calculating the first light effect A of the main pixel M1 of the display panel 10 includes: determining a first integral interval [X 11 , X 12 ], according to the light efficiency curve, the first integral interval [X 11 , X 12 ] to simulate and obtain the first light effect A.

[0080] For example, in some embodiments, Figure 5 As shown, assuming that the height of the retaining wall 23 is h, the width of the black matrix 21 between the main pixel M1 and the adjacent pixel M2 is B, the cell spacing between the array substrate 1 and the color filter substrate 2 is G, the pixel size is P, and the width of the conductive layer 11 is S, the first integral interval is That is to say Then, the first light effect A can be obtained through software simulation.

[0081] In some embodiments, calculating the second light effect B of the main pixel M1 of the display panel includes: determining a second integral interval [X 21 , X 22 ], according to the light efficiency curve, the second integral interval [X 21 , X 22 ] to simulate and obtain the second light effect B.

[0082] For example, in some embodiments, the alignment offset value is Δx, such as Figure 7 As shown, its parameters have the same meaning as Figure 5 , then the second integration interval is That is to say Then, the second light effect B can be obtained through software simulation.

[0083] In some embodiments, calculating the third light effect C of the adjacent pixel M2 of the main pixel M1 includes: determining a third integral interval [X 31 , X 32 ], the third integral interval [X 31 , X 32 ]Substitute into the curve equation y=f(x) and integrate to obtain the third light effect C.

[0084] Typically, the third integral interval is relatively small and limited to a certain fixed region. Therefore, only a partial interval of the light efficiency curve may be fitted to obtain the curve equation y=f(x) of the light efficiency curve, which is beneficial to simplify calculations.

[0085] For example, in some embodiments, the third integral interval [X 31 , X 32 ] includes: calculating the third integral interval [X according to the height h of the retaining wall 23, the width of the black matrix 21 between the main pixel M1 and the adjacent pixel M2, the cell spacing G between the array substrate 1 and the color filter substrate 2, and the alignment offset value Δx. 31 , X 32 ] upper limit value X 32 .

[0086] Since the height h of the retaining wall 23 can be equivalent to the effect of adjusting the alignment offset value Δx, in this design method, the height h of the retaining wall 23 is brought into the calculation process, which is beneficial to reducing the range of the third integral interval and simplifying the fitting and integral calculation process. For example, in the related method, the display panel does not have a retaining wall 23, and the third integral interval is In the embodiment of the present application, the retaining wall 23 can block the cross-color light path. Figure 7 As shown, using the principle of similar triangles, we can know that Based on this, it can be calculated that the upper limit of the third integral interval in the embodiment of the present application is Also because Therefore

[0087]

[0088] For example, in some embodiments, the purpose of introducing the barrier 23 is to reduce the light efficiency integral of adjacent pixels when the alignment is offset, that is, there must be That is to say Then there is

[0089] Based on this, the minimum height of the retaining wall 23 can be calculated. That is, in the display panel, the height of the retaining wall 23 must meet In order to effectively block the cross-color light path.

[0090] For example, the inventors have found that, assuming an alignment process accuracy of Δx = 3 μm, a black matrix 21 width of B = 5.5 μm, a cell pitch between the array substrate 1 and the color filter substrate 2 of G = 3.5 μm, a pixel size of P = 30.7 μm, and a conductive layer 11 width of S = 2.6 μm, using the above design method, the height h of the retaining wall 23 is at least 1.59 μm. This height is significantly smaller than the height of the spacers in the liquid crystal layer 3 and therefore does not affect the support cell thickness or the image display.

[0091] In some embodiments, according to a reference integral interval in which the adjacent pixel M2 affects the main pixel M1 , a light efficiency curve of the display panel in the reference integral interval is obtained, and a curve equation of the light efficiency curve is obtained by fitting.

[0092] Affected by factors such as pixel design and the minimum spacing between adjacent sub-pixels, the light effect curve of cross-color simulation is a wavy curve, and the entire range cannot be expressed by a polynomial. Figure 8 As an example of the light effect curve shown in FIG. 1 , in some embodiments, the reference integral interval in which the adjacent pixel M2 affects the main pixel M1 only involves Figure 8 The curve in the dotted box, i.e. the calculation related to the height h of the retaining wall 23, only involves Figure 8 The curve in the dotted box is a section of the curve, so we can only fit the curve equation of this section of the light effect curve, which can greatly reduce the amount of calculation. Figure 9 As shown, Figure 9 A simulated light efficiency curve diagram of a reference integral interval provided in an embodiment of the present application. Figure 9 The reference integration interval shown corresponds to Figure 8 The first part F1 in the dotted box is Figure 8 The second portion F2 within the dashed box is almost a vertical curve and is therefore not considered for fitting.

[0093] Based on this, the curve equation of the reference integral interval light efficiency curve can be expressed by a polynomial, which is conducive to simplifying the calculation process.

[0094] For example, the inventors discovered that, assuming an alignment process accuracy of Δx = 3 μm, a width of the black matrix 21 of B = 5.5 μm, a cell pitch between the array substrate 1 and the color filter substrate 2 of G = 3.5 μm, a pixel size of P = 30.7 μm, and a width of the conductive layer 11 of S = 2.6 μm, according to the above design method, the first light effect A corresponds to the first integral interval of [2.75, 27.95], the second light effect B corresponds to the second integral interval of [5.75, 30.95], and the third light effect C corresponds to the third integral interval of [1.3, 9.625 / h + 0.25].

[0095] Taking the main pixel M1 as the red sub-pixel R as an example, first, the three stimulus values ​​RX, RY, and RZ of the red sub-pixel R are simulated and calculated without offset. Correspondingly, the three color coordinates are It is understood that the tristimulus values ​​of the green sub-pixel G are GX, GY, and GZ, and the tristimulus values ​​of the blue sub-pixel B are BX, BY, and BZ. The tristimulus values ​​are determined according to the backlight unit and the color resist layer.

[0096] The pixel simulation light effect curve obtained by software simulation is fitted to obtain a curve equation y=f(x).

[0097] Taking a red screen followed by green light as an example, according to the light effect curve of the display panel, the first integration interval is simulated to obtain the first light effect A, and the second integration interval is simulated to obtain the second light effect B. The third integration interval is substituted into the curve equation y = f(x) for integration to obtain the third light effect C.

[0098] Taking the offset red picture string green light as an example, the tristimulus values ​​of the offset red sub-pixel R are Correspondingly, the color coordinates after offset are

[0099] According to CIE standards, spatial color difference in By substituting the color coordinates before and after the offset into the calculation, the spatial color difference ΔE can be calculated, and compared with the empirical value to determine whether cross-color occurs.

[0100] For example, as shown in Table 1 below, when the alignment offset is 3 μm, if the spatial color difference ΔE is greater than the empirical value shown in the table below, it can be considered that cross-color occurs in the display panel.

[0101]

[0102] Table 1

[0103] In a second aspect, the present application also provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are run on a computer, the computer executes the design method mentioned in any embodiment mentioned in the first aspect above.

[0104] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards, and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0105] In a third aspect, the present application further provides a computer program product, for example, stored on a non-transitory computer-readable storage medium. The computer program product includes computer program instructions that, when executed on a computer, cause the computer to perform the design method described in any of the embodiments of the first aspect.

[0106] In a fourth aspect, the present application also provides a display panel, such as Figure 4 As shown, along the direction Z perpendicular to the substrate 20, the height h of the retaining wall 23 is determined by the design method mentioned in any one of the embodiments mentioned in the first aspect above. By setting the retaining wall 23, the risk of cross-color can be effectively reduced by physically blocking the cross-color light path while ensuring the transmittance of the display panel 10, and the precision requirement of the alignment process for the cross-color problem can be improved. And according to the design method mentioned in any one of the embodiments mentioned in the first aspect above, by adjusting the height value h of the retaining wall 23, the same effect as adjusting the alignment offset value Δx or increasing the width of the black matrix 21 can be formed, which not only ensures the transmittance of the display panel 10, but also realizes the reasonable design of the height of the retaining wall 23, which is conducive to reducing costs and avoiding waste, and can also avoid the retaining wall 23 being too high to affect the display effect.

[0107] In some embodiments, the retaining wall 23 and the black matrix 21 are made of the same material, for example, both materials may include chromium, chromium oxide, or black resin.

[0108] In a fifth aspect, the present application also provides a display device, such as Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application. The display device 50 includes the display panel 10 mentioned in any embodiment of the fourth aspect above, and a backlight module 51. The backlight module 51 is disposed on a side of the array substrate 1 of the display panel 10 that is away from the color filter substrate 2. The backlight module 51 provides light for the display panel 10, ultimately allowing the display device 50 to display relevant images.

[0109] The display device 50 may be any device that displays either moving (e.g., video) or stationary (e.g., still images), and whether textual or graphical. More specifically, it is contemplated that the embodiments described may be implemented in or associated with a variety of electronic devices, such as, but not limited to, mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, video cameras, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., speedometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), and the like.

[0110] The display device 50 provided in the embodiment of the present application can reduce the risk of cross-color and improve the precision requirements of the alignment process for the cross-color problem. By adjusting the height value h of the retaining wall 23, the same effect as adjusting the alignment offset value Δx or increasing the width of the black matrix 21 can be achieved, which is beneficial to ensure that the transmittance is not affected by the process capabilities. In addition, through the reasonable design of the height of the retaining wall 23, it is possible to avoid the height of the retaining wall 23 being too small to effectively block the cross-color light path, and to avoid the height of the retaining wall 23 being too high, thereby causing the support box thickness to have a potential impact on the picture display.

[0111] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in this application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for designing a display panel, characterized in that: include: Calculating a first light effect of a primary pixel of a display panel; The first light effect is the light effect when the array substrate and the color filter substrate are aligned without shifting; Setting an alignment offset value between the array substrate and the color filter substrate; Calculating a second light effect of a primary pixel of the display panel according to the alignment offset value; The second light effect is a light effect when the array substrate and the color filter substrate are offset from each other; Calculating the third light effect of the adjacent pixel of the main pixel according to the height value of the retaining wall on the color filter substrate; the retaining wall is arranged between the main pixel and the adjacent pixel; The third light effect is the light effect of the adjacent pixel affecting the primary pixel when the array substrate and the color filter substrate are offset from each other; Calculating a spatial color difference of the primary pixel according to the first light effect, the second light effect, and the third light effect; When the color difference is greater than a threshold, the height of the retaining wall is adjusted until the color difference is less than or equal to the threshold.

2. The design method according to claim 1, characterized in that: The design method further includes: Obtaining a light efficiency curve of the display panel; Calculating a first light effect of a primary pixel of a display panel includes: Determining a first integration interval of the main pixel when the main pixel is not shifted; The first integral interval is simulated according to the light effect curve of the display panel to obtain the first light effect.

3. The design method according to claim 1, characterized in that: The design method further includes: Obtaining a light efficiency curve of the display panel; Calculating a second light effect of a primary pixel of the display panel includes: determining a second integration interval of the main pixel in a case of alignment shift; The second integral interval is simulated according to the light effect curve of the display panel to obtain the second light effect.

4. The design method according to claim 1, characterized in that: The design method further includes: Obtaining a light effect curve of the display panel, and fitting a curve equation of the light effect curve; Calculating a third light effect of a pixel adjacent to the primary pixel, comprising: determining a third integral interval in which the adjacent pixel affects the primary pixel; The third integral interval is substituted into the curve equation for integration to obtain the third light effect.

5. The design method according to claim 4, characterized in that: Determining a third integral interval in which the adjacent pixel affects the primary pixel includes: The upper limit of the third integral interval is calculated according to the height of the retaining wall, the width of the black matrix between the main pixel and the adjacent pixel, the cell spacing between the array substrate and the color filter substrate, and the alignment offset value.

6. The design method according to claim 4 or 5, characterized in that: Assume that the height of the retaining wall is h, the width of the black matrix between the main pixel and the adjacent pixel is B, the cell spacing between the array substrate and the color filter substrate is G, and the alignment offset value is Δx; The upper limit of the third integral interval is 7. The design method according to claim 6, characterized in that: Then there is 8. The design method according to claim 4, characterized in that: According to a reference integral interval in which the adjacent pixels affect the main pixel, a light efficiency curve of the display panel in the reference integral interval is obtained, and a curve equation of the light efficiency curve is obtained by fitting.

9. The design method according to claim 1, characterized in that: The alignment offset value is set according to an alignment process and an alignment device between the array substrate and the color filter substrate.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer program instructions, which, when executed on a computer, enable the computer to execute the design method according to any one of claims 1 to 9.

11. A computer program product, characterized in that The computer program product comprises computer program instructions, and when the computer program instructions are executed on a computer, the computer program instructions cause the computer to execute the design method according to any one of claims 1 to 9.

12. A display panel, characterized in that: The display panel includes an array substrate and a color filter substrate that are arranged opposite to each other, and the color filter substrate includes a substrate, a black matrix, a plurality of color resist layers and a retaining wall; The black matrix is ​​arranged on a side of the substrate close to the array substrate, the black matrix includes a plurality of openings, and a color resist layer is arranged in one opening; The retaining wall is provided on a side of the black matrix close to the array substrate, and the orthographic projection of the retaining wall on the substrate is located between the orthographic projections of two adjacent openings on the substrate; In a direction perpendicular to the substrate, the height of the retaining wall is determined by the design method according to any one of claims 1 to 9.

13. The display panel according to claim 12, wherein: The retaining wall is made of the same material as the black matrix.

14. A display device, characterized in that: include: The display panel according to claim 12 or 13; The backlight module is arranged on a side of the array substrate of the display panel away from the color filter substrate.

Images