Display panel, design method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a design method thereof and a display device, and relates to the technical field of display. The color film substrate of the display panel comprises a retaining wall, and aims to effectively reduce the color crossing risk and improve the precision requirement of the color crossing problem on the alignment process through a method of physically shielding a color crossing light path under the condition of ensuring the transmittance of the display panel. In the design method of the display panel, an alignment deviation value can be preset according to the process and the level of equipment, the spatial chromatic aberration of a main pixel can be calculated according to the height value of a retaining wall, and under the condition that the chromatic aberration is larger than a threshold value, the height value of the retaining wall is adjusted until the chromatic aberration is smaller than or equal to the threshold value. According to the method, the same effect of adjusting the alignment deviation value or increasing the width of the black matrix can be formed by adjusting the height value of the retaining wall, the transmittance of the display panel is guaranteed, reasonable design of the height of the retaining wall can be achieved, cost can be reduced, waste can be avoided, and the situation that the display effect is affected due to the fact that the retaining wall is too high can be avoided.

Description

Technical Field

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

[0002] At present, the development of display panel products tends to higher pixel density, pixel design tends to the limit, pixel size is getting smaller and smaller, and the proportion of cross-color is getting larger under the same alignment conditions. In order to avoid cross-color, it is usually necessary to sacrifice transmittance or improve alignment accuracy, which greatly increases 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 processes 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 deviation.

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

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

[0008] L04: Calculate 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 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 of the main pixel when the alignment is not offset; simulating the first integral interval according to the 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; 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 effect curve of the display panel, and fitting to obtain a curve equation of the light effect curve.

[0016] Calculating the third light effect of the neighboring pixels of the main pixel includes: determining a third integral interval in which the neighboring 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 value 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 further provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are executed 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 cause 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, which includes an array substrate and a color filter substrate arranged relatively 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 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 material of the barrier ribs is the same as that of the black matrix.

[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 that are arranged relatively 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, 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 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. By setting 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 the design method of the display panel, the alignment offset value of the array substrate and the color filter substrate 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 on the color filter substrate. When the color difference is greater than a 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 achieve 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.

[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] In order to more clearly illustrate the technical solution in the present application, the following is a brief introduction to the drawings required for use in some embodiments of the present application. Obviously, the drawings described below are only drawings of some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, not the actual size of the product involved in the embodiments of the present application, or the actual process of the method.

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

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

[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 diagram of the structure 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] Fig. 9 A simulated light effect curve diagram of a reference integral interval provided in an embodiment of the present application;

[0041] Fig.10 A schematic diagram of the structure 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 described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present application.

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

[0044] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, 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 the present application, unless otherwise specified, "plurality" means two or more.

[0045] When describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For example, when describing some embodiments, the term "connection" 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 an 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 between the layer or element and the other layer or substrate.

[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 area 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 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 reach 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 in a certain light-on screen, the display area is partially or entirely mixed with other colors, resulting in abnormal display of the screen. 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, wherein the color filter substrate 2 includes a black matrix 21 and a plurality of color resist layers 22, the plurality of 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, and the plurality of color resist layers 22 are arranged in a plurality of openings of the black matrix 21. Assuming that the display panel only lights up the red screen, that is, the liquid crystal in the liquid crystal layer 3 directly below the red sub-pixel color resist layer 221 is deflected, and polarized light can be observed through the red sub-pixel color resist layer 221.

[0052] by Figure 1 or Figure 2 As shown in the figure, for example, if the liquid crystal in the liquid crystal layer 3 directly below the red sub-pixel color-resistance layer 221 is deflected so that polarized light can pass through the adjacent blue sub-pixel color-resistance layer 223 under the cross-color inspection viewing angle, and the color difference reaches a level that the human eye can distinguish, it is determined that the display panel has 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, and the degree of color mixing is affected by the full pixel light effect. The higher the light effect at the edge of the pixel, the higher the degree of cross-color and the greater the risk of cross-color.

[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] In order 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 picture 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, Figure 4 A schematic diagram of the structure 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 opposite to each other. The color filter substrate 2 includes a substrate 20, a black matrix 21, a plurality of color resist layers 22 and a retaining wall 23. The black matrix 21 is arranged on a side of the substrate 20 close to the array substrate 1. The black matrix 21 includes a plurality of openings V1, and one color resist layer 22 is arranged in one opening V1. The retaining wall 23 is arranged on a side of the black matrix 21 close to the array substrate 1, and 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 processes L01 to L06:

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

[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 deviation. 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, and the conductive layer 11 is arranged opposite to the black matrix 21. Figure 4 Taking a certain black matrix 21 and conductive layer 11 on the XY plane as an example, the array substrate 1 and the color filter substrate 2 are aligned without deviation, 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] Exemplarily, in some embodiments, the alignment offset value Δx may be set according to an alignment process and an alignment device of the array substrate 1 and the color filter substrate 2 .

[0064] like Figure 6 As shown, Figure 6 A schematic diagram of a display panel alignment offset structure provided in an embodiment of the present application, Figure 7 for Figure 6 An 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: Calculate the 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 the 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: According to the height value h of the retaining wall 23 on the color filter substrate 2, the third light effect C of the adjacent pixel M2 of the main pixel M1 is calculated. 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 on 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 under 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 display 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: According to the first light effect A, the second light effect B and the third light effect C, calculate the spatial color difference ΔE of the main pixel M1.

[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 here can be determined based on experience, and the threshold may be different for different products or when different colors are mixed in the same picture.

[0073] Combination Figure 4 and Figure 6 It can be understood that both the alignment offset value Δx and the height value 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 and the color difference ΔE, and when the color difference ΔE is greater than the threshold, adjusting the alignment offset value Δx until the color difference ΔE is less than or equal to the threshold. The calculation process is relatively cumbersome, and it is necessary to continuously set the alignment offset value Δx to calculate the light effect and the 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 high 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 discovered that, in conventional designs, based on simulation calculations, the alignment accuracy needs to satisfy the alignment offset value Δx≤±1.8μm in order to avoid the risk of cross-color. However, this accuracy requirement exceeds the limit of process capabilities and cannot be achieved in practice. 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 need to change the pixel design, and the alignment offset value Δx can be pre-set according to the level of the process and equipment. 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, that is, the retaining wall 23 is used to block the direction of the cross-color light path, and under the cross-color viewing angle, the possibility of polarized light passing through the color resistance layer of the adjacent pixel M2 after the liquid crystal deflection in the liquid crystal layer directly below the color resistance layer of the main pixel M1 is reduced. In addition, this method is conducive to realizing the 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 value 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, the method can be used to realize the 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 can avoid the retaining wall 23 being too high, thereby causing the support box thickness to have a potential impact on the display panel.

[0076] Based on this, the 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, the light effect curve can be obtained by software simulation. In addition, in some embodiments, the light effect curve equation y=f(x) can be obtained by fitting.

[0078] For example, Figure 8 As shown, Figure 8 A simulated light effect curve diagram provided in 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, for 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, then 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 neighboring pixel M2 of the main pixel M1 includes: determining a third integral interval [X] of the influence of the neighboring pixel M2 on the main pixel M1. 31 , X 32 ], the third integral interval [X 31 , X 32 ] is substituted into the curve equation y=f(x) and integrated to obtain the third light effect C.

[0084] Usually, the third integral interval is relatively small and is limited to a certain fixed area. Only a partial interval of the light efficiency curve can be fitted to obtain the curve equation y=f(x) of the light efficiency curve, which is conducive to simplifying the calculation.

[0085] Exemplarily, 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 the design method, the height h of the retaining wall 23 is brought into the calculation process, which is conducive 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 is not provided with 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 wall 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 satisfy In order to effectively block the cross-color light path.

[0090] For example, the inventors have found through research that, assuming that the alignment process accuracy is Δx=3μm, the width of the black matrix 21 is B=5.5μm, the cell spacing between the array substrate 1 and the color filter substrate 2 is G=3.5μm, the pixel size is P=30.7μm, and the width of the conductive layer 11 is S=2.6μm. Substituting into the above design method, the height h of the retaining wall 23 is at least 1.59μm, which is much smaller than the height of the spacer in the liquid crystal layer 3, and therefore will not affect the support cell thickness and the screen display.

[0091] In some embodiments, according to the reference integral interval in which the adjacent pixel M2 affects the main pixel M1 , the light efficiency curve of the display panel in the reference integral interval is obtained, and the 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 dashed box, i.e., the calculation related to the height h of the retaining wall 23, only involves Figure 8 The curve in the dashed 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. Fig. 9 As shown, Fig. 9 A simulated light efficiency curve diagram of a reference integral interval provided in an embodiment of the present application. Fig. 9 The reference integration interval shown corresponds to Figure 8 The first part F1 in the dashed 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 helpful to simplify the calculation process.

[0094] For example, the inventors have found that, assuming that the alignment process accuracy is Δx=3μm, the width of the black matrix 21 is B=5.5μm, the cell spacing between the array substrate 1 and the color filter substrate 2 is G=3.5μm, the pixel size is P=30.7μm, and the width of the conductive layer 11 is S=2.6μm. 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 without offset are simulated and calculated. Correspondingly, the three color coordinates are It can be 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 the red picture and green light as an example, according to the light effect curve of the display panel, the first integral interval is simulated to obtain the first light effect A, and the second integral interval is simulated to obtain the second light effect B. The third integral 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 three stimulus values ​​of the offset red sub-pixel R are Correspondingly, the color coordinates after offset are

[0099] According to CIE standard, spatial color difference in By bringing the color coordinates before and after the offset into the calculation, the spatial color difference ΔE can be calculated, and it can be 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 further provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are executed 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, the computer program product is stored on a non-transitory computer-readable storage medium. The computer program product includes 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 mentioned in any embodiment mentioned in the first aspect above.

[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 material of the retaining wall 23 and the black matrix 21 is the same, for example, the material thereof may include chromium, chromium oxide, or black resin.

[0108] In a fifth aspect, the present application also provides a display device, such as Fig.10 As shown, Fig.10 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, and a backlight module 51, the backlight module 51 is arranged on a side of the array substrate 1 of the display panel 10 away from the color filter substrate 2. The backlight module 51 provides a light source for the display panel 10, and finally enables the display device 50 to display relevant images.

[0109] The display device 50 described above can be any device that displays, whether in motion (e.g., video) or fixed (e.g., still image), and whether text or images. More specifically, it is contemplated that the embodiments described can 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, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controls and / or displays, displays of camera views (e.g., displays of rear-view 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), etc.

[0110] The display device 50 provided in the embodiment of the present application can reduce the risk of cross-color mixing and improve the precision requirements of the alignment process for the cross-color mixing 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 is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that a person skilled in the art can think of within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope 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 deviation; 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 on the primary pixel when the array substrate and the color filter substrate are offset from each other; Calculating the 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 value, the height value of the retaining wall is adjusted until the color difference is less than or equal to the threshold value.

2. The design method according to claim 1, characterized in that: The design method further comprises: Obtaining a light efficiency curve of the display panel; Calculating a first light effect of a primary pixel of a display panel includes: Determine a first integration interval of the main pixel when the alignment is not offset; 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 comprises: 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 primary pixel when the primary pixel is offset; 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 comprises: Acquire a light effect curve of the display panel, and obtain a curve equation of the light effect curve by fitting; Calculating the third light effect of the adjacent pixels of the primary pixel, comprising: Determining a third integral interval in which the adjacent pixel affects the primary pixel; Substituting the third integral interval into the curve equation for integration, the third light effect is obtained.

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 the 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, and when the computer program instructions are executed on a computer, the computer is enabled 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 comprises an array substrate and a color filter substrate which are arranged opposite 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; Along 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, characterized in that: The material of the retaining wall is the same as that of 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 film substrate.

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