Display panel and display device

Abstract

The invention discloses a display panel and a display device, relates to the technical field of display, and aims to improve the display effect. The display panel comprises a display area, a non-display area and a transition pixel area located between the display area and the non-display area, a color film substrate and an array substrate of the display panel are oppositely arranged, the color film substrate comprises a black matrix, and the black matrix comprises a first part located in the transition pixel area and a second part located in the non-display area. The thickness of the first part is smaller than that of the second part. Moreover, the first spacer is arranged on the side, close to the array substrate, of the first part, the second spacer is arranged on the side, close to the array substrate, of the second part, and the height of the first spacer is larger than that of the second spacer. The height of the first spacer is larger than that of the second spacer, and the supporting design of the transition pixel area and the non-display area is improved, so that the supporting heights of all the areas tend to be consistent, and the problem of display yellowing is avoided.

Description

Technical Field

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

[0002] In the field of display technology, products with rounded corners, V-shaped or U-shaped grooves, round holes and other special shapes have become the norm. For these special-shaped products, the boundary of the display area is prone to uneven brightness or inconsistent colors (display mura), such as yellowing or bluish, which affects the user experience. Summary of the invention

[0003] The present application provides a display panel and a display device, aiming to improve the problem of yellowing or bluish display and enhance the display effect.

[0004] In a first aspect, the present application provides a display panel, comprising a display area, a non-display area, and a transition pixel area between the display area and the non-display area. The display panel comprises an array substrate, a color filter substrate, a first spacer, and a second spacer. The color filter substrate is arranged opposite to the array substrate, and the color filter substrate comprises a black matrix, and the black matrix comprises a first part located in the transition pixel area, and a second part located in the non-display area. Along the direction in which the color filter substrate is opposite to the array substrate, the thickness of the first part is less than the thickness of the second part. In addition, the first spacer is arranged on a side of the first part close to the array substrate, and the second spacer is arranged on a side of the second part close to the array substrate. Along the direction in which the color filter substrate is opposite to the array substrate, the height of the first spacer is greater than the height of the second spacer.

[0005] In the above-mentioned embodiments of the present application, based on the different thicknesses of the black matrix in different areas, a design with multiple spacers of different heights is adopted. For example, the thickness of the black matrix in the first part of the transition pixel area is less than the thickness in the second part of the non-display area. By setting the height of the first spacer located on the first part to be greater than the height of the second spacer located on the second part, the height of the top of the first spacer is close to the top of the second spacer. In the transition pixel area and the non-display area, the support height of the spacers tends to be consistent, thereby improving the yellowing or bluish problems caused by uneven box thickness and improving the display effect.

[0006] In some embodiments, an orthographic projection area of ​​an end surface of the first spacer away from the color filter substrate on the color filter substrate is smaller than an orthographic projection area of ​​an end surface of the second spacer away from the color filter substrate on the color filter substrate.

[0007] In some embodiments, the array substrate includes a first area and a second area, the outer boundary of the orthographic projection of the first spacer on the array substrate coincides with the outer boundary of the first area, the outer boundary of the orthographic projection of the second spacer on the array substrate coincides with the outer boundary of the second area, and no spacer is provided in the first area and the second area. The black matrix also includes a third part located in the display area, and the thickness of the third part is less than the thickness of the first part. The display panel also includes a third spacer and a fourth spacer, the third spacer is arranged on a side of the third part close to the array substrate, and the fourth spacer is arranged on a side of the array substrate close to the color filter substrate, and the third spacer and the fourth spacer are against each other. The area of ​​the orthographic projection of the end face of the second spacer away from the color filter substrate on the color filter substrate is smaller than the area of ​​the orthographic projection of the end face of the third spacer away from the color filter substrate on the color filter substrate.

[0008] In some embodiments, the end surface of the first spacer away from the color filter substrate has a first distance from the array substrate, the end surface of the second spacer away from the color filter substrate has a second distance from the array substrate, and the first distance is equal to the second distance.

[0009] In some embodiments, the black matrix further includes a fourth portion located in the display area, and the thickness of the fourth portion is less than the thickness of the first portion. The display panel further includes a fifth spacer and a sixth spacer, the fifth spacer is arranged on a side of the fourth portion close to the array substrate, the sixth spacer is arranged on a side of the array substrate close to the color filter substrate, and the fifth spacer and the sixth spacer are opposite and spaced apart. The end surface of the fifth spacer away from the color filter substrate has a third distance from the end surface of the sixth spacer away from the array substrate, and the first distance, the second distance and the third distance are all equal.

[0010] In some embodiments, the display panel further includes a plurality of pixels, the plurality of pixels are arranged in the display area and the transition pixel area, and each pixel includes a plurality of sub-pixels. The black matrix further includes a plurality of openings, each of which exposes a sub-pixel. The plurality of openings include a first opening, a second opening, and a third opening arranged in the first portion of the black matrix, the first opening, the second opening, and the third opening corresponding to sub-pixels of different pixels, the distances between the first opening, the second opening, and the third opening and the display area increase in sequence, and the areas of the orthographic projections of the first opening, the second opening, and the third opening on the color film substrate decrease in sequence.

[0011] In some embodiments, the multiple openings also include a fourth opening arranged in the display area, and the shapes of the orthographic projections of the first opening, the second opening, and the third opening on the color film substrate are the same as the shape of the orthographic projection of the fourth opening on the color film substrate, and the area of ​​the orthographic projection of the first opening on the color film substrate is less than or equal to the area of ​​the orthographic projection of the fourth opening on the color film substrate.

[0012] In some embodiments, the sub-pixel includes a middle region and a peripheral region surrounding the middle region, and the first opening, the second opening, and the third opening are all disposed in the middle region of the corresponding sub-pixel.

[0013] In some embodiments, the display panel also includes a first pixel, a second pixel, and a third pixel arranged in a transition pixel area, and the distances between the first pixel, the second pixel, and the third pixel and the display area increase successively, and the grayscale percentages of the first pixel, the second pixel, and the third pixel decrease successively.

[0014] In a second aspect, the present application further provides a display device, comprising a display panel and a backlight module as mentioned in any one of the embodiments of the first aspect, wherein the backlight module is arranged on a side of the array substrate of the display panel away from the color film substrate.

[0015] The display device provided in the embodiment of the present application improves the support design of the transition pixel area and the non-display area. By setting the height of the first spacer to be greater than the height of the second spacer, the support heights of each area tend to be consistent, thereby avoiding the yellowing problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0018] Figure 2 A diagram showing the steps for preparing a spacer provided in an embodiment of the present application;

[0019] Figure 3 A top view of a display panel provided in an embodiment of the present application;

[0020] Figure 4 for Figure 3 A partial enlarged view of the display panel at position P is shown;

[0021] Figure 5A to Figure 5E A schematic diagram of various shielding methods for grayscale pixels in the related art;

[0022] Figure 6 A schematic diagram of a pixel dark area in the related art;

[0023] Figure 7 A top view of another display panel provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] 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.

[0026] 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."

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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 conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include deviations in shape due to, for example, manufacturing. 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.

[0032] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] In the related technologies, some display products related to the display technology field, such as mobile phones and computers, have special-shaped designs such as rounded corners, V-shaped or U-shaped grooves, and round holes. With the upgrading of consumption, technological progress, and appearance requirements, the demand for special shapes in display products is increasing. For these special-shaped products, taking rounded corners or round holes as an example, the four corners of the display area need to be rounded or a round hole needs to be designed in the center area, and the pixels near the arc boundary of the rounded corners or round holes need to be partially blocked with a black matrix.

[0034] During the preparation process, since the black matrix is ​​an organic material, the black matrix is ​​less and less affected by the etching of the developer in the arc boundary and the area outside, that is, the transition pixel area and the non-display area, and its thickness is inconsistent with the display area. From the display area to the non-display area, the thickness of the black matrix gradually increases. On this basis, the spacers set on the black matrix in different areas will make the support height of different areas inconsistent, which will cause the display panel box thickness to be uneven, and then cause the display to be yellow or bluish.

[0035] In view of the above problems, an embodiment of the present application provides a display panel, which aims to improve the problem of yellowing or bluish edges of special-shaped products and enhance the display effect.

[0036] like Figure 1 As shown, Figure 1 This is a cross-sectional view of a display panel provided in an embodiment of the present application. The display panel 1 includes a display area A1, a non-display area A3, and a transition pixel area A2 located between the display area A1 and the non-display area A3.

[0037] The non-display area A3 includes the peripheral area surrounding the display area A1, and also includes areas such as the camera hole located in the display area A1. In order to improve the display effect, a transition pixel area A2 is usually provided between the display area A1 and the non-display area A3 to achieve a grayscale transition display effect, thereby making the edge display effect smoother.

[0038] like Figure 1 As shown, the display panel 1 includes an array substrate 11 and a color filter substrate 12 that are arranged opposite to each other, wherein the color filter substrate 12 includes a substrate 10 and a black matrix 13 located on the substrate 10, and the black matrix 13 includes a first portion 131 located in a transition pixel area A2 and a second portion 132 located in a non-display area A3. Figure 1In the Z-axis direction shown, the thickness of the first part 131 is less than the thickness of the second part 132.

[0039] The display panel 1 further includes a first spacer 141 and a second spacer 142. The first spacer 141 is disposed on the side of the first part 131 close to the array substrate 11, and the second spacer 142 is disposed on the side of the second part 132 close to the array substrate 11. Along the direction in which the color filter substrate 12 faces the array substrate 11, the height of the first spacer 141 is greater than the height of the second spacer 142. That is, along the Z-axis direction, if the height of the first spacer 141 is set as H1 and the height of the second spacer 142 is set as H2, then H1 > H2.

[0040] In the above embodiments of the present application, based on the different thicknesses of the black matrix 13 in different regions, a design with different heights of multiple spacers is adopted. For example, the thickness of the first part 131 of the black matrix 13 in the transition pixel region A2 is less than the thickness of the second part 132 in the non-display region A3. By setting the height of the first spacer 141 located on the first part 131 to be greater than the height of the second spacer 142 located on the second part 132, the heights of the top ends of the first spacer 141 and the second spacer 142 are made close. In the transition pixel region A2 and the non-display region A3, the support heights of the spacers are made to tend to be consistent, thereby improving problems such as yellowing or bluing caused by uneven cell thickness and enhancing the display effect.

[0041] In some embodiments, as Figure 1 shown, the first spacer 141 includes an end face P1 away from the color filter substrate 12, and the second spacer 142 includes an end face P2 away from the color filter substrate 12. The area of the orthographic projection of the end face P1 of the first spacer 141 on the color filter substrate 12 is less than the area of the orthographic projection of the end face P2 of the second spacer 142 on the color filter substrate 12, which can be briefly recorded as P1 < P2. This is associated with H1 > H2. For details, please refer to the following:

[0042] As Figure 2 shown, Figure 2 is a step diagram for preparing spacers provided by an embodiment of the present application. It can be understood that this preparation process refers to exposing and developing the spacer layer 140 under the shielding of each masking area of the mask plate 30 to obtain the required spacers. For example, under the shielding of the masking area 31, the first spacer 141 is finally formed, and under the shielding of the masking area 32, the second spacer 142 is finally formed.

[0043] During the preparation process, the mask area corresponding to the first spacer 141 and the second spacer 142 is an opaque area. During the process of forming the first spacer 141 and the second spacer 142, light will be diffracted to the bottom of the mask area, and a part of the spacer layer 140 blocked by the opaque mask area will also be removed by development. The amount of removal has a certain relationship with the size of the mask area. In other words, it is reflected in the spacer finally formed, that is, the smaller the mask area, the less part is removed by development, and the corresponding spacer is higher.

[0044] Based on the above, by setting the area of ​​the mask region 31 to be smaller than the area of ​​the mask region 32, the portion of the spacer layer 140 located below the mask region 31 is removed less, and the portion of the spacer layer 140 located below the mask region 32 is removed more, and the height H1 of the first spacer 141 formed finally is greater than the height H2 of the second spacer 142. On this basis, combined with the thickness difference between the first portion 131 and the second portion 132, it is beneficial to make the support heights of the transition pixel area A2 and the non-display area A3 tend to be consistent, thereby avoiding problems such as yellowing or bluishness caused by uneven cell thickness.

[0045] Moreover, since the area of ​​the mask region 31 is smaller than the area of ​​the mask region 32, the shielding area of ​​the spacer layer 140 by the mask region 31 is smaller than the shielding area of ​​the spacer layer 140 by the mask region 32, and the area of ​​the end surface P1 of the first spacer 141 finally formed is smaller than the area of ​​the end surface P2 of the second spacer 142.

[0046] In some embodiments, Figure 1 As shown, the array substrate 11 includes a first area 111 and a second area 112, the outer boundary of the orthographic projection of the first spacer 141 on the array substrate 11 coincides with the outer boundary of the first area 111, and the outer boundary of the orthographic projection of the second spacer 142 on the array substrate 11 coincides with the outer boundary of the second area 112, and no spacers are arranged in the first area 111 and the second area 112 of the array substrate 11, that is, no spacers are arranged at the corresponding positions of the first spacer 141 on the array substrate 11, and no spacers are arranged at the corresponding positions of the second spacer 142 on the array substrate 11, so that a distance is left between the first spacer 141 and the second spacer 142 and the array substrate 11, so that the first spacer 141 and the second spacer 142 are not in contact with the array substrate 11, and a buffer space for deformation can be provided for the box body to avoid stress concentration and damage to the array substrate 11 and the color filter substrate 12 under the action of external force.

[0047] Furthermore, when the deformation of the box body reaches a certain degree, the box body will abut against the first spacer 141 and the second spacer 142 , and the first spacer 141 and the second spacer 142 can play a role of auxiliary support.

[0048] For example, Figure 1 As shown, the end surface P1 of the first spacer 141 has a first distance H10 from the array substrate 11, and the end surface P2 of the second spacer 142 has a second distance H20 from the array substrate 11, and the first distance H10 is equal to the second distance H20. It should be noted that "equal" here includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0049] It can be understood that, when the thickness of the first part 131 is less than the thickness of the second part 132, the height of the first spacer 141 is prepared to be greater than the height of the second spacer 142, so that the sum of the thicknesses of the first spacer 141 and the first part 131 is equal to the sum of the thicknesses of the second spacer 142 and the second part 132, so that after the array substrate 11 and the color film substrate 12 are boxed, the first distance H10 and the second distance H20 are equal, and the supporting heights of the transition pixel area A2 and the non-display area A3 are equal, which effectively improves the problem of yellowing or bluish edges of the display area and enhances the display effect.

[0050] like Figure 1 As shown, the black matrix 13 further includes a third portion 133 located in the display area A1, and the thickness of the third portion 133 is less than the thickness of the first portion 131. The display panel 1 further includes a third spacer 143 and a fourth spacer 144. The third spacer 143 is arranged on a side of the third portion 133 close to the array substrate 11, and the fourth spacer 144 is arranged on a side of the array substrate 11 close to the color filter substrate 12, and the third spacer 143 and the fourth spacer 144 abut against each other. Different from the first spacer 141 and the second spacer 142 which play an auxiliary supporting role, the third spacer 143 and the fourth spacer 144 abut against each other to play a main supporting role to ensure the thickness of the cell.

[0051] Exemplarily, the spacing distance H34 between the third spacer 143 and the fourth spacer 144 is ≤0, and H34=0 means that the end surfaces of the third spacer 143 and the fourth spacer 144 just touch each other, and the sum of the height H3 of the third spacer 143, the height H4 of the fourth spacer 144 and the thickness of the third part 133 is the box thickness H0 of the display panel 1.

[0052] Furthermore, the third spacer 143 includes an end surface P3 away from the color filter substrate 12, and the area of ​​the orthographic projection of the end surface P2 of the second spacer 142 on the color filter substrate 12 is smaller than the area of ​​the orthographic projection of the end surface P3 of the third spacer 143 on the color filter substrate 12, which can be simply referred to as P2 <P3。

[0053] See also Figure 2During the preparation process, the mask area 33 corresponding to the third spacer 143 is also a light-proof area, and the light will be diffracted to the bottom of the mask area 33, and a part of the spacer layer 140 blocked by the mask area 33 will also be removed by development. Combined with the "corresponding relationship between the mask area area and the spacer height formed by the corresponding area" mentioned above, the appropriate mask area area can be adjusted to generate a spacer with a suitable height.

[0054] For example, Figure 1 As shown, by setting the area of ​​the mask region 33 to be larger than the area of ​​the mask region 32, a smaller amount of the spacer layer 140 located below the mask region 32 is removed, and a larger amount of the spacer layer 140 located below the mask region 33 is removed, and a height H3 of the third spacer 143 finally formed is smaller than a height H2 of the second spacer 142, such that H1>H2>H3.

[0055] On this basis, combined with the thickness difference among the first part 131, the second part 132 and the third part 133, a fourth spacer 144 is provided on the array substrate 11. The fourth spacer 144 and the third spacer 143 play a major supporting role to ensure the thickness of the box and avoid problems such as yellowing or bluish.

[0056] Furthermore, since the area of ​​the mask region 33 is larger than that of the mask region 32, the shielding area of ​​the spacer layer 140 by the mask region 33 is larger than that by the mask region 32, and the area of ​​the end surface P3 of the third spacer 143 formed finally is larger than the area of ​​the end surface P2 of the second spacer 142, that is, P1 <P2<P3。

[0057] In some embodiments, Figure 1 As shown, the black matrix 13 further includes a fourth portion 134 located in the display area A1, and the thickness of the fourth portion 134 is less than the thickness of the first portion 131. The display panel 1 further includes a fifth spacer 145 and a sixth spacer 146, the fifth spacer 145 is disposed on a side of the fourth portion 134 close to the array substrate 11, and the sixth spacer 146 is disposed on a side of the array substrate 11 close to the color filter substrate 12, and the fifth spacer 145 and the sixth spacer 146 are opposite to each other and spaced apart.

[0058] Furthermore, the fifth spacer 145 includes an end surface P4 away from the color filter substrate 12, the sixth spacer 146 includes an end surface P5 away from the array substrate 11, a third distance H56 is provided between the end surface P4 of the fifth spacer 145 and the end surface P5 of the sixth spacer 146, and the first distance H10, the second distance H20 and the third distance H56 are all equal. Similarly, it should be noted that the "equal" here includes absolute equality and approximate equality.

[0059] In the examples of this application, see Figure 2 During the preparation process, the mask area 34 corresponding to the fifth spacer 145 is a low transmittance area, for example, the transmittance is 30%. Compared with the mask area 33 corresponding to the third spacer 143 which is opaque, under the same exposure amount, more of the spacer layer 140 is developed and removed below the mask area 34, so that the height H5 of the fifth spacer 145 is smaller than the height H3 of the third spacer 143, then H5<H3<H2

[0060] Similar to the functions of the first distance H10 and the second distance H20 , the third distance H56 can also be used to provide a buffer space for deformation, thereby preventing stress concentration and damage to the array substrate 11 and the color filter substrate 12 due to external force.

[0061] It can be understood that, in combination with the specific thicknesses of the first part 131, the second part 132 and the fourth part 134, the heights of the first spacer 141, the second spacer 142, the fifth spacer 145 and the sixth spacer 146 are reasonably designed during the preparation process, so that the sum of the thicknesses of the first spacer 141 and the first part 131 is equal to the sum of the thicknesses of the second spacer 142 and the second part 132, and is equal to the sum of the thicknesses of the fourth part 134, the fifth spacer 145 and the sixth spacer 146, so that the first distance H10, the second distance H20 and the third distance H56 are all equal.

[0062] By setting the first distance H10, the second distance H20 and the third distance H56 to be equal, the support heights of the display area A1, the transition pixel area A2 and the non-display area A3 of the entire display panel are uniform and consistent, so that the box thickness of the display panel 1 is consistent, avoiding problems such as yellowing or bluishness caused by uneven box thickness, and improving the display effect.

[0063] Figure 3 A top view of a display panel provided in an embodiment of the present application; Figure 4 for Figure 3 A partial enlarged view of the display panel at position P is shown.

[0064] like Figure 3 As shown, the display panel 1 further includes a plurality of pixels 60, each pixel 60 including a plurality of sub-pixels 70. Figure 3 As shown in the dotted box, a pixel 60 includes three sub-pixels 70. Multiple pixels 60 are arranged in the display area A1 and the transition pixel area A2. For the convenience of distinction, the pixels in the display area A1 are called "normal pixels" and the pixels in the transition pixel area A2 are called "grayscale pixels". ​

[0065] On the display panel 1, the black matrix 13 further includes a plurality of openings 40, each of which exposes a sub-pixel 70. Figure 3 As shown, the plurality of openings 40 include a first opening 41, a second opening 42 and a third opening 43 arranged in the first portion 131 of the black matrix 13, the first opening 41, the second opening 42 and the third opening 43 correspond to sub-pixels 70 of different pixels 60, the distances between the first opening 41, the second opening 42 and the third opening 43 and the display area A1 increase successively, and the areas of the orthographic projections of the first opening 41, the second opening 42 and the third opening 43 on the color film substrate 12 decrease successively.

[0066] like Figure 4 As shown, it can be understood that the dividing line 51 is a visual dividing line defined artificially. Taking the rounded corner of a product as an example, the dividing line 51 can be understood as the rounded arc of the visual product boundary, and is not a physical structure in the display panel 1. Similarly, the boundary line 52 parallel thereto can be understood as the boundary between the transition pixel area and the display area, and is not a physical structure in the display panel 1.

[0067] In order to achieve a good display effect, the pixels near the arc boundary of the rounded corner or the round hole need to be partially blocked by the black matrix, so that the grayscale pixel display brightness decreases in the direction from the display area A1 to the non-display area A3. Through reasonable brightness transition, the visual display jaggedness of the dividing line 51 is reduced.

[0068] For example, Figure 4 As shown, the distances between the multiple pixels 60 located in the transition pixel area A2, such as the grayscale pixel 61, the grayscale pixel 62, and the grayscale pixel 63 and the display area A1 increase sequentially, the first opening 41 exposes the sub-pixel 70 of the grayscale pixel 61, the second opening 42 exposes the sub-pixel 70 of the grayscale pixel 62, and the third opening 43 exposes the sub-pixel 70 of the grayscale pixel 63.

[0069] Under the same light conditions, the brightness of each pixel is related to the light transmittance of the pixel. The smaller the pixel opening area, the lower the light transmittance, and the lower the brightness. Therefore, the areas of the orthographic projections of the first opening 41, the second opening 42, and the third opening 43 on the color filter substrate 12 are reduced in sequence, so that the brightness of the corresponding sub-pixels under the same light conditions can be reduced in sequence, and accordingly, the brightness of the corresponding grayscale pixels 61, grayscale pixels 62, and grayscale pixels 63 are also reduced in sequence. By analogy, a gradual change in brightness from the display area A1 to the non-display area A2 can be achieved near the dividing line 51, which weakens the sawtooth effect and improves the display effect.

[0070] The method of controlling the brightness by shielding the pixels through the black matrix 13 and controlling the size of the opening area corresponding to the grayscale pixels in the transition pixel area A2 can form a more ideal pixel configuration during the product production process, which is beneficial to the configuration of the subsequent drive system. For example, under ideal conditions, the transition pixel area A2 and the display area A1 can use the same light conditions, and there is no need to adjust the drive signal of each grayscale pixel in the transition pixel area A2 through a complex algorithm, so that a gradual change in light and dark can be achieved.

[0071] However, if the occlusion area or occlusion method is unreasonable, there will be obvious jagged visual effects, resulting in poor display effects. At present, there are four common ways for the black matrix 13 to occlude pixels: (1) occlude the upper or lower side of the pixel; (2) occlude the upper and lower sides of the pixel and divide them equally; (3) occlude the left or right side of the pixel; (4) a combination of the first three. For example, Figure 5A to Figure 5E As shown, Figure 5A to Figure 5E Schematic diagram of various shielding methods for grayscale pixels in related technologies. Figure 5A Shown is how to block the top side of a pixel. Figure 5B Shown is how to block the bottom side of a pixel. Figure 5C The following is a method of blocking the upper and lower sides of the pixel and dividing them equally. Figure 5D This shows how to block the left side of a pixel. Figure 5E Shown is how the right side of the pixel is occluded.

[0072] The shielding method in the above related technology is only shielding based on the percentage of the overlapping area between the dividing line 51 and the grayscale pixel, that is, the area of ​​the grayscale pixel between the dividing line 51 and the boundary line 52 before shielding is used as the opening area corresponding to the grayscale pixel, and the rest is shielded by the black matrix 13.

[0073] This processing method is too simple, and can achieve the design effect for products with a large radius of the dividing line 51 or a large pixel resolution. However, for products with a small radius of the dividing line 51 or a small pixel resolution, such as products with a radius less than 1.0mm or a pixel resolution less than 180, the visual jaggedness will become more obvious.

[0074] In addition, in some cases, the brightness (or light transmittance) of the grayscale pixel formed by simply determining the size of the opening area based on the overlap area percentage deviates from the expected value. Figure 6 Schematic diagram of a pixel dark area in the related art, such as Figure 6 Area B shown in the dotted box will cause a dark area to appear because the liquid crystal deflection is disordered and cannot be deflected to the ideal angle according to the applied voltage value. If the pixel opening area is determined simply based on the percentage of overlapping area, its light transmittance will be lower than the expected value, resulting in low brightness of this part of the final display.

[0075] Based on this, the display panel in the embodiment of the present application adds a pixel correction process in the process of preparing the opening 40 of the black matrix 13: after drawing the opening of the black matrix 13 corresponding to the grayscale pixel according to the overlapping area of ​​the grayscale pixel and the dividing line 51, simulate the light passing through the opening of the black matrix 13 corresponding to the grayscale pixel, and collect the light transmittance. Then, according to the light transmittance of the grayscale pixel, adjust the opening area of ​​the black matrix 13 corresponding to the grayscale pixel until the light transmittance reaches the preset transmittance, thereby obtaining the final opening area of ​​the black matrix 13 corresponding to the grayscale pixel. By adding the above-mentioned pixel correction process, the brightness of the grayscale pixel can be made to match the dividing line 51 more closely, so that the display effect is closer to reality.

[0076] In some embodiments, Figure 4 As shown, the multiple openings 40 also include a fourth opening 44 arranged in the display area A1, and the shapes of the orthographic projections of the first opening 41, the second opening 42 and the third opening 43 on the color film substrate 12 are all the same as the shape of the orthographic projection of the fourth opening 44 on the color film substrate 12, and the area of ​​the orthographic projection of the first opening 41 on the color film substrate 12 is less than or equal to the area of ​​the orthographic projection of the fourth opening 44 on the color film substrate 12.

[0077] For example, after the above pixel correction process, the overlap area percentage of the grayscale pixel 62 is determined to be 30%, then the area of ​​the second opening 42 corresponding to the corresponding sub-pixel 70 is 30% of the area of ​​the fourth opening 44 corresponding to the corresponding sub-pixel 70 of the normal pixel 64 in the display area, and the shape of the second opening 42 is the same as the shape of the fourth opening 44. The openings corresponding to other pixels are similar.

[0078] In the embodiment of the present application, a new shielding method is adopted so that the opening 40 corresponding to the sub-pixel 70 of the grayscale pixel is proportionally scaled with the opening corresponding to the sub-pixel 70 of the normal pixel in the display area A1, thereby optimizing the shielding method of the black matrix 13, which is beneficial to forming a visually uniform and consistent display effect, and is beneficial to a smoother display with less jaggedness.

[0079] In some embodiments, Figure 4 As shown, the sub-pixel 70 includes a middle region 71 and a peripheral region 72 surrounding the middle region 71 , and the first opening 41 , the second opening 42 and the third opening 43 are all disposed in the middle region 71 of the corresponding sub-pixel 70 .

[0080] and Figure 5A to Figure 5ECompared with the blocking method of grayscale pixels in the related art shown in the figure, the embodiment of the present application is equivalent to that the sub-pixel opening in the transition pixel area A2 is obtained by proportionally reducing the sub-pixel opening in the display area A1 according to the corresponding area percentage, and the effective display area is placed in the middle area 71 of each sub-pixel 70, that is, the center position of the effective display area coincides with the center position of the middle area 71. Accordingly, the distance between the effective display area of ​​each sub-pixel 70 in the grayscale pixel and the normal pixel can remain unchanged, which is conducive to improving the display effect. Compared with the blocking method of the related art, the configuration of the embodiment of the present application can make the display smoother and less jagged, and can still have a good display effect in products with lower pixel resolution.

[0081] Figure 7 A top view of another display panel provided in an embodiment of the present application, in which a square area represents a pixel 60. In some embodiments, such as Figure 7 As shown, the display panel 1 further includes a first pixel 61, a second pixel 62, and a third pixel 63 disposed in the transition pixel area A2. The distances between the first pixel 61, the second pixel 62, and the third pixel 63 and the display area A1 increase in sequence, and the grayscale percentages of the first pixel 61, the second pixel 62, and the third pixel 63 decrease in sequence. The grayscale percentage here can be understood as the percentage of the grayscale value of the second pixel 62 and the third pixel 63 to the grayscale value of the first pixel 61, respectively, with the grayscale value of the first pixel 61 closest to the display area A1 as the reference value (that is, 100%).

[0082] The grayscale percentage here is adjusted by adjusting the voltage value applied by the driving circuit to the corresponding pixel, that is, if the actual display is still not ideal after being shielded by the black matrix 13, the driving signal of the relevant grayscale pixel can be locally fine-tuned to adjust the luminous brightness. By reasonably adjusting the relationship between the grayscale values ​​of the pixels in the transition pixel area A2, a good transition effect is formed, the abruptness of the actual display is reduced, and the display effect is improved.

[0083] For example, Figure 7 In the display panel 1 shown, after the final opening is determined according to the overlap area percentage and the aforementioned pixel correction process, the opening area of ​​the black matrix corresponding to the first pixel 61 is taken as the reference value (i.e., 100%), the opening area of ​​the black matrix corresponding to the second pixel 62 is 95%, and the opening area of ​​the black matrix corresponding to the third pixel 63 is 30%. If the grayscale value displayed by the first pixel 61 is 100%, the grayscale value displayed by the second pixel 62 is 95%, and the grayscale value displayed by the third pixel 63 is 30%.

[0084] Under this grayscale configuration, when the display image is identified as unqualified, for example, when there are visual "black spots" or obvious jaggedness in the display, the relevant pixel is identified as a display jagged pixel. For example, the second pixel 62 is identified as a display jagged pixel.

[0085] After that, the grayscale value of the jagged pixel is fine-tuned by adjusting the driving voltage value, and the above-mentioned process of "identifying the jagged pixel" and "fine-tuning the grayscale value of the jagged pixel" is repeated until the display is free of jaggedness. For example, the driving voltage value applied to the relevant sub-pixel of the second pixel 62 can be adjusted to reduce the grayscale value of the second pixel 62 to 80%, thereby achieving a smooth transition of the display brightness of the transition pixel area A2 and eliminating the "black spot" or jaggedness.

[0086] The above method of fine-tuning the display brightness of grayscale pixels through a driving circuit can further optimize the display effect based on the hardware structure, making the display smoother.

[0087] In a second aspect, the present application also provides a display device, such as Figure 8 As shown, Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0088] The display device 2 includes the display panel 1 and the backlight module 21 mentioned in any one of the embodiments of the first aspect, wherein the backlight module 21 is arranged on a side of the array substrate 11 of the display panel 1 away from the color filter substrate 12. The backlight module 21 provides a light source for the display panel 1, and finally enables the display device 2 to display relevant images.

[0089] The display device 2 described above can be any device that displays, whether in motion (e.g., video) or fixed (e.g., still image) and whether text or image. 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.

[0090] The display device 2 provided in the embodiment of the present application improves the support design of the transition pixel area A2 and the non-display area A3. By setting the height of the first spacer 141 to be greater than the height of the second spacer 142, the support heights of each area tend to be consistent, thereby avoiding the problem of yellowing or bluish display.

[0091] And in some embodiments, the areas of the orthographic projections of the first opening 41, the second opening 42 and the third opening 43 on the color film substrate 12 decrease successively, so that the light transmittance of the corresponding sub-pixels decreases successively, and the brightness of the corresponding sub-pixels decreases successively, thereby achieving a display effect in which the brightness of the corresponding pixels gradually decreases, which can weaken the jagged effect.

[0092] 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 display panel, characterized in that: It includes a display area, a non-display area and a transition pixel area between the display area and the non-display area; The display panel comprises: An array substrate; a color filter substrate, arranged opposite to the array substrate; the color filter substrate comprises a black matrix, the black matrix comprises a first portion located in the transition pixel area, and a second portion located in the non-display area; along the direction in which the color filter substrate is opposite to the array substrate, the thickness of the first portion is less than the thickness of the second portion; A first spacer and a second spacer, wherein the first spacer is arranged on a side of the first portion close to the array substrate, and the second spacer is arranged on a side of the second portion close to the array substrate; along the direction in which the color film substrate is relative to the array substrate, the height of the first spacer is greater than the height of the second spacer.

2. The display panel according to claim 1, characterized in that: An area of ​​an orthographic projection of an end surface of the first spacer away from the color filter substrate on the color filter substrate is smaller than an area of ​​an orthographic projection of an end surface of the second spacer away from the color filter substrate on the color filter substrate.

3. The display panel according to claim 2, characterized in that: The array substrate comprises a first region and a second region, the outer boundary of the orthographic projection of the first spacer on the array substrate coincides with the outer boundary of the first region, the outer boundary of the orthographic projection of the second spacer on the array substrate coincides with the outer boundary of the second region, and no spacer is provided in the first region and the second region; The black matrix further includes a third portion located in the display area, the thickness of the third portion is less than the thickness of the first portion; the display panel further includes a third spacer and a fourth spacer, the third spacer is arranged on a side of the third portion close to the array substrate, the fourth spacer is arranged on a side of the array substrate close to the color filter substrate, and the third spacer abuts against the fourth spacer; An area of ​​an orthographic projection of an end surface of the second spacer away from the color filter substrate on the color filter substrate is smaller than an area of ​​an orthographic projection of an end surface of the third spacer away from the color filter substrate on the color filter substrate.

4. The display panel according to claim 1, characterized in that: An end surface of the first spacer away from the color filter substrate is at a first distance from the array substrate, and an end surface of the second spacer away from the color filter substrate is at a second distance from the array substrate; The first distance is equal to the second distance.

5. The display panel according to claim 4, characterized in that: The black matrix further includes a fourth portion located in the display area, and a thickness of the fourth portion is smaller than a thickness of the first portion; The display panel further includes a fifth spacer and a sixth spacer, wherein the fifth spacer is disposed on a side of the fourth portion close to the array substrate, and the sixth spacer is disposed on a side of the array substrate close to the color film substrate, and the fifth spacer and the sixth spacer are opposite to each other and spaced apart; An end surface of the fifth spacer away from the color filter substrate is at a third distance from an end surface of the sixth spacer away from the array substrate; the first distance, the second distance and the third distance are all equal.

6. The display panel according to claim 1, characterized in that: The display panel further comprises a plurality of pixels, wherein the plurality of pixels are arranged in the display area and the transition pixel area, and each pixel comprises a plurality of sub-pixels; The black matrix further comprises a plurality of openings, each opening exposing a sub-pixel; The multiple openings include a first opening, a second opening, and a third opening arranged in a first portion of the black matrix, the first opening, the second opening, and the third opening corresponding to sub-pixels of different pixels; the distances between the first opening, the second opening, and the third opening and the display area increase successively, and the areas of the orthographic projections of the first opening, the second opening, and the third opening on the color film substrate decrease successively.

7. The display panel according to claim 6, characterized in that: The multiple openings also include a fourth opening arranged in the display area, and the shapes of the orthographic projections of the first opening, the second opening and the third opening on the color film substrate are all the same as the shape of the orthographic projection of the fourth opening on the color film substrate, and the area of ​​the orthographic projection of the first opening on the color film substrate is less than or equal to the area of ​​the orthographic projection of the fourth opening on the color film substrate.

8. The display panel according to claim 6 or 7, characterized in that: The sub-pixel includes a middle area and a peripheral area surrounding the middle area, and the first opening, the second opening and the third opening are all arranged in the middle area of ​​the corresponding sub-pixel.

9. The display panel according to claim 1, characterized in that: The display panel further includes a first pixel, a second pixel and a third pixel disposed in the transition pixel region, and the distances between the first pixel, the second pixel and the third pixel and the display region increase in sequence; The grayscale percentages of the first pixel, the second pixel and the third pixel decrease in sequence.

10. A display device, characterized in that: include: The display panel according to any one of claims 1 to 9; The backlight module is arranged on a side of the array substrate of the display panel away from the color film substrate.

Images