Color filter, display panel and forming method of color filter

By designing the multi-layer color resistance layer structure of color filters, the black matrix layer is eliminated, and the problem of high production costs of traditional color filters is solved, and efficient light shading performance and simplified process flow is achieved.

CN119882301APending Publication Date: 2025-04-25INESA DISPLAY MATERIALS
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Patent Information

Application Number
CN202411863493.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-04-25

AI Technical Summary

Technical Problem

Traditional color filters require a black matrix process during the production process, resulting in high production costs and complex processes.

Method used

A color filter is designed, which includes a plurality of color resistance layers, each color resistance layer has a color development part, a non-color development part and a light shielding part. The light shielding parts of each color resistance layer are overlapped, and the black matrix layer is omitted.

Benefits of technology

By having the large optical density value of the light-shielding portions of the laminated multiple color resistance layers, the light-shielding performance can be effectively guaranteed, the possibility of light leakage can be reduced, the process flow can be simplified, and the production cost can be reduced.

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Abstract

The invention discloses a color filter, a display panel and a forming method of the color filter, the color filter comprises a plurality of color resistance layers, the color resistance layers are stacked on a substrate, each color resistance layer is provided with at least one color resistance unit, each color resistance unit is provided with a color developing part, two non-color developing parts and a shading part, each shading part comprises a first shading sub-part and a second shading sub-part, and the first shading sub-part and the second shading sub-part are arranged on the substrate. The two non-developing parts are adjacent, the first sub-shading part is located between the two non-developing parts, the second sub-shading part is located between the developing part and one non-developing part, the developing parts of the color resistance units in the color resistance layers are staggered, and the shading parts of the color resistance layers are overlapped. The light density value of the light shielding parts of the multiple stacked color resistance layers is large, the light shielding performance can be effectively guaranteed, and the possibility of light leakage is reduced; moreover, the shading parts of the color resistance layers are overlapped, so that the optical density values of all areas of the shading parts of the color resistance layers stacked on the substrate are equal, the shading effects are similar, and the performance stability of the color filter and the display panel is improved.
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Description

Technical Field

[0001] The present invention relates to a semiconductor manufacturing process, and in particular to a color filter, a display panel and a method for forming the color filter. Background Art

[0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as LCD TVs, mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or laptop screens, etc., and dominates the field of flat panel displays.

[0003] Liquid crystal display panels usually include an array substrate, a color filter substrate, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. For a traditional vertical alignment (VA) type liquid crystal display panel, a thin film transistor (TFT) arranged in a matrix is ​​usually arranged on the array substrate, and a color filter layer for filtering light, a black matrix (BM) for shading and preventing different colors of light from mixing, and a columnar spacer (PS) for supporting the cell gap of the liquid crystal layer between the array substrate and the color filter substrate are usually arranged on the color filter substrate.

[0004] However, current color filters leave much to be desired. Summary of the invention

[0005] The problem solved by the present invention is how to omit the traditional black matrix manufacturing process and reduce the production cost of the color filter while ensuring the light shielding effect.

[0006] In order to solve the above problems, the present invention provides a color filter, comprising: a substrate; a plurality of color resist layers, wherein the plurality of color resist layers are stacked on the substrate, the color resist layer has at least one color resist unit, and the color resist units each have a color developing portion, two non-color developing portions and a light shielding portion, the light shielding portion comprises a first sub-light shielding portion and a second sub-light shielding portion, the two non-color developing portions are adjacent, the first sub-light shielding portion is located between the two non-color developing portions, and the second sub-light shielding portion is located between the color developing portion and one non-color developing portion, the color developing portions of the color resist units in each color resist layer are staggered with each other, and the light shielding portions of each color resist layer overlap.

[0007] Optionally, the color developing portion and the non-color developing portion have the same area.

[0008] Optionally, among the plurality of color-resist layers, a light-shielding portion of the color-resist layer closest to the substrate is in direct contact with the substrate.

[0009] Optionally, the optical density value of the light-shielding portion of the plurality of stacked color-resist layers is greater than a preset optical density threshold.

[0010] Optionally, the color-resist layer further includes: a light-shielding peripheral portion, wherein the light-shielding peripheral portion surrounds the color-resist unit; and the light-shielding peripheral portions of each color-resist layer overlap.

[0011] Optionally, among the plurality of color-resist layers, a light-shielding outer peripheral portion of the color-resist layer closest to the substrate is in direct contact with the substrate.

[0012] Optionally, the width of the first sub-light-shielding portion is in the range of 5 μm to 15 μm; the width of the second sub-light-shielding portion is in the range of 5 μm to 15 μm.

[0013] Optionally, the number of the color resist layers is greater than or equal to 3.

[0014] Optionally, the color resist layer includes: a blue color resist layer, a green color resist layer and a red color resist layer.

[0015] Optionally, it also includes: a planar layer located on the multi-layer color resist layer.

[0016] Optionally, it also includes: a support column located on the flat layer.

[0017] Correspondingly, the technical solution of the present invention further provides a display panel, which includes the color filter as described in any one of the above items.

[0018] Correspondingly, the technical solution of the present invention also provides a method for forming a color filter, comprising: providing a substrate; forming a color resist layer, the color resist layer having at least one color resist unit, the color resist units each having a color developing portion, two non-color developing portions and a shading portion, the shading portion comprising a first sub-shading portion and a second sub-shading portion, the two non-color developing portions are adjacent, the first sub-shading portion is located between the two non-color developing portions, and the second sub-shading portion is located between the color developing portion and one non-color developing portion; stacking a plurality of the color resist layers on the substrate, the color developing portions of the color resist units in each color resist layer are staggered with each other, and the shading portions of each color resist layer overlap.

[0019] Optionally, the step of forming the color resist layer includes: providing an initial color resist layer; forming a mask layer on the initial color resist layer, wherein the mask layer exposes a portion of the surface of the initial color resist layer; and etching the initial color resist layer using the mask layer as a mask to form the color resist layer.

[0020] Optionally, the step of forming the mask layer includes: providing a photomask; forming an initial mask layer on the initial color resist layer; and exposing and developing the initial mask layer using the photomask as a mask template to form the mask layer.

[0021] Optionally, the mask is a Slit mask.

[0022] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0023] In the color filter of the technical solution of the present invention, the shading parts of each color resist layer overlap, and the optical density value of the shading parts of the stacked multiple color resist layers is relatively large, which can effectively ensure the shading performance and effectively reduce the possibility of light leakage; and the shading parts of each color resist layer overlap, so that the optical density values ​​of each area of ​​the shading parts of the multiple color resist layers stacked on the substrate are equal, so that the shading effects of each area of ​​the shading parts of the multiple color resist layers stacked on the substrate are similar, thereby improving the performance stability of the color filter and the display panel.

[0024] In an optional solution of the present invention, among the plurality of color-resist layers, the light-shielding portion of the color-resist layer closest to the substrate is in direct contact with the substrate. That is, no black matrix layer is provided between the color-resist layer and the substrate, and the light-shielding portion of the stacked plurality of color-resist layers has a larger optical density value, which plays the role of a black matrix layer to avoid light leakage, simplifies the process flow and reduces production costs.

[0025] In an optional solution of the present invention, the optical density value of the light-shielding portion of the multiple stacked color-resist layers is greater than a preset optical density threshold. That is, the optical density value of the light-shielding portion of the multiple stacked color-resist layers is greater than the preset optical density threshold, and the optical density value of the light-shielding portion of the multiple stacked color-resist layers is relatively large, which can effectively ensure the light-shielding performance and reduce the possibility of light leakage from the light-shielding portion of the multiple stacked color-resist layers.

[0026] In an optional solution of the present invention, the color-resist layer further comprises: a light-shielding peripheral portion, the light-shielding peripheral portion surrounds the color-resist unit; the light-shielding peripheral portions of each layer of the color-resist layer overlap. The light-shielding peripheral portions of the stacked multiple color-resist layers have a larger optical density value, which can effectively ensure the light-shielding performance and reduce the possibility of light leakage from the light-shielding peripheral portions of the stacked multiple color-resist layers.

[0027] In the method for forming a color filter of the technical solution of the present invention, the shading parts of each color resist layer overlap, and the optical density value of the shading parts of the stacked multiple color resist layers is relatively large, which can effectively ensure the shading performance and effectively reduce the possibility of light leakage; and the shading parts of each color resist layer overlap, so that the optical density values ​​of each area of ​​the shading parts of the multiple color resist layers stacked on the substrate are equal, so that the shading effects of each area of ​​the shading parts of the multiple color resist layers stacked on the substrate are similar, thereby improving the performance stability of the color filter and the display panel.

[0028] In an optional solution of the present invention, the light mask is a Slit light mask. The widths of the first sub-light shielding portion and the second sub-light shielding portion are relatively small, and the use of a Slit light mask can meet the size requirements of the first sub-light shielding portion and the second sub-light shielding portion, thereby reducing the possibility of light leakage in the light shielding portion of the stacked multiple color resist layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an assembly diagram of a color filter in the prior art;

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of a color filter in the prior art;

[0031] Figure 3 is a top view of a color resist layer in accordance with an embodiment of the present invention;

[0032] Figure 4 is a top view of a color resist layer in accordance with an embodiment of the present invention;

[0033] Figure 5 is a top view of a color resist layer in accordance with an embodiment of the present invention;

[0034] Figure 6 is a top view of a plurality of color resist layers stacked in an embodiment of the present invention;

[0035] Figure 7 is an assembly diagram of a color filter according to an embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the cross-sectional structure of a color filter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] As can be seen from the background technology, the color filter in the prior art still has problems. The reasons for the problems are analyzed below:

[0038] Please refer to Figure 1 and Figure 2 A color filter comprises: a substrate 100; a plurality of color resist layers 101, wherein the plurality of color resist layers 101 are stacked on the substrate 100, the color resist layer 101 has at least one color resist unit U, and each of the color resist units U has a color developing portion A, a non-color developing portion B, and a first light shielding portion C, the non-color developing portion B is adjacent to the color developing portion A, the first light shielding portion C is located between the non-color developing portion B and the color developing portion A, and the color developing portions A of the color resist units U in each color resist layer 101 are staggered with each other.

[0039] The color-resist layer 101 further includes a light-shielding peripheral portion D, wherein the light-shielding peripheral portion D surrounds the color-resist unit U.

[0040] The number of the color resist layers 101 is greater than or equal to 3. Specifically, in this embodiment, the number of the color resist layers 101 is 3. The color resist layers 101 include a blue color resist layer 1011 , a green color resist layer 1012 , and a red color resist layer 1013 .

[0041] The red color resist layer 1013 , the green color resist layer 1012 , and the blue color resist layer 1011 are stacked to form a light shielding stack layer 102 at the overlapping portion of the red color resist layer 1013 , the green color resist layer 1012 , and the blue color resist layer 1011 .

[0042] However, the light shielding effect of each part of the light shielding stack 102 is not consistent. The light shielding stack 102 is divided into a first sub-layer 1021 extending along the first direction X and a second sub-layer 1022 extending along the second direction Y. This is because the first sub-layer 1021 is obtained by stacking the light shielding peripheral portion D of three color resist layers, namely, the red color resist layer 1013, the green color resist layer 1012 and the blue color resist layer 1011, while the second sub-layer 1022 is obtained by stacking the first light shielding portion C of two color resist layers, namely, the red color resist layer 1013, the green color resist layer 1012 and the blue color resist layer 1011. This causes the optical density values ​​of the first sub-layer 1021 and the second sub-layer 1022 to be unequal, resulting in inconsistent light shielding effects in various areas of the light shielding stack 102, which affects the performance stability of the color filter and the display panel.

[0043] In order to solve the technical problem, the present invention provides a color filter, comprising: a substrate; a plurality of color resist layers, wherein the plurality of color resist layers are stacked on the substrate, the color resist layer has at least one color resist unit, and the color resist units each have a color developing portion, two non-color developing portions and a light shielding portion, the light shielding portion comprises a first sub-light shielding portion and a second sub-light shielding portion, the two non-color developing portions are adjacent, the first sub-light shielding portion is located between the two non-color developing portions, and the second sub-light shielding portion is located between the color developing portion and one non-color developing portion, the color developing portions of the color resist units in each color resist layer are staggered with each other, and the light shielding portions of each color resist layer overlap.

[0044] In the color filter of the technical solution of the present invention, the light-shielding parts of each color-resistance layer overlap, and the light-shielding parts of the stacked multiple color-resistance layers have a large optical density value, which can effectively ensure the light-shielding performance and effectively reduce the possibility of light leakage; and the light-shielding parts of each color-resistance layer overlap, so that the light-shielding parts of the multiple color-resistance layers stacked on the substrate have equal optical density values ​​in each region, so that the light-shielding effects of the light-shielding parts of the multiple color-resistance layers stacked on the substrate are similar, which improves the performance stability of the color filter and the display panel. .

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] Please refer to Figure 8 , the color filter includes: a substrate 200.

[0047] The substrate 200 provides support for the color resist layer 201. Specifically, in some embodiments of the present invention, the material of the substrate 200 is glass.

[0048] Please refer to Figures 3 to 8 The color filter comprises: a plurality of color resist layers 201, wherein the plurality of color resist layers 201 are stacked on the substrate 200, wherein the color resist layer 201 has at least one color resist unit U, wherein each color resist unit U has a color developing portion A, two non-color developing portions B and a light shielding portion, wherein the light shielding portion comprises a first sub-light shielding portion C and a second sub-light shielding portion D, wherein the two non-color developing portions B are adjacent, wherein the first sub-light shielding portion C is located between the two non-color developing portions B, and the second sub-light shielding portion D is located between the color developing portion A and one non-color developing portion B, wherein the color developing portions A of the color resist units U in each color resist layer 201 are staggered with each other, and the light shielding portions of each layer of the color resist layer 201 are overlapped.

[0049] A plurality of color resist layers 201, that is, the number of the color resist layers 201 is greater than or equal to 3. Specifically, in some embodiments of the present invention, please refer to Figures 3 to 5 , the number of the color resist layers 201 is 3. The color resist layers 201 include: a blue color resist layer 2011 , a green color resist layer 2012 , and a red color resist layer 2013 .

[0050] Specifically, in some embodiments of the present invention, please continue to refer to Figures 3 to 5 , the number of the color resistance units U is 2, the color resistance units U are arranged in sequence along the first direction X, the color development portion A extends along the second direction Y, and the second direction Y is perpendicular to the first direction X. In other embodiments, the color resistance units can be other values.

[0051] The color-developing portions A of the color-resistance units U in each color-resistance layer 201 are staggered, that is, the projections of the color-developing portions A of each color-resistance layer 201 on the surface of the substrate 200 do not overlap. Figures 3 to 7 As shown, the color development parts A of each color resist layer 201 are staggered with each other, so that no crosstalk occurs between the color development parts A of each color resist layer 201 stacked on the substrate 200 .

[0052] Specifically, in some embodiments of the present invention, the color developing portion A and the non-color developing portion B have the same area.

[0053] Specifically, in some embodiments of the present invention, the width of the first sub-light shielding portion C is in the range of 5 μm to 15 μm. The width of the first sub-light shielding portion C is: the size of the first sub-light shielding portion C along the first direction X. The width of the second sub-light shielding portion D is in the range of 5 μm to 15 μm. The width of the second sub-light shielding portion D is: the size of the second sub-light shielding portion D along the first direction X.

[0054] Please continue to refer to Figures 3 to 8 , the light-shielding portions of the plurality of color-resist layers 201 are stacked to form a light-shielding stack 202. Specifically, in some embodiments of the present invention, the light-shielding stack 202 includes two first sub-light-shielding portions C of the color-resist layers 201, and one second sub-light-shielding portion D of the color-resist layer 201. The optical density value of each color-resist layer 201 ranges from 1 to 2. That is, the optical density value of the blue color-resist layer 2011 ranges from 1 to 2, the optical density value of the green color-resist layer 2012 ranges from 1 to 2, and the optical density value of the red color-resist layer 2013 ranges from 1 to 2. The sum of the optical density values ​​of the light-shielding portions of the plurality of color-resist layers 201 after stacking is greater than a preset optical density threshold. The optical density threshold is 3. The light-shielding portions of each layer of the color-resist layer 201 overlap, so that the optical density value of the light-shielding portion of the stacked color-resist layer 201 is greater than the optical density threshold, which can effectively ensure the light-shielding performance and effectively reduce the possibility of light leakage.

[0055] Specifically, in some embodiments of the present invention, please refer to Figures 3 to 8 , among the plurality of color-resist layers 201, the light-shielding portion of the color-resist layer 201 closest to the substrate 200 is in direct contact with the substrate 200. That is, no black matrix layer is disposed between the light-shielding portion of the color-resist layer 201 and the substrate 200, and the light-shielding portion of the stacked plurality of color-resist layers 201 has a larger optical density value, which plays the role of a black matrix layer to prevent light leakage, and simplifies the process flow and reduces the production cost.

[0056] Please continue to refer to Figures 3 to 8 The color-resist layer 201 further includes: a light-shielding peripheral portion E, wherein the light-shielding peripheral portion E surrounds the color-resist unit U.

[0057] Specifically, the light-shielding peripheral portion E includes: a first sub-peripheral portion F extending along the first direction X and a second sub-peripheral portion G extending along the second direction Y. The width of the second sub-peripheral portion G is in the range of 5μm to 15μm. The width of the second sub-peripheral portion G is the size of the second sub-peripheral portion G along the first direction X. The width of the first sub-peripheral portion F is greater than the widths of the first sub-light-shielding portion C and the second sub-light-shielding portion D, and the width of the first sub-peripheral portion F is the size of the first sub-peripheral portion F along the second direction Y.

[0058] Please continue to refer to Figures 3 to 8 , the light-shielding peripheral portions E of each color-resist layer 201 overlap. The light-shielding peripheral portions E of the multiple stacked color-resist layers 201 form a part of the light-shielding stacked layer 202. The light-shielding peripheral portions E of each color-resist layer 201 overlap, so that the optical density value of the light-shielding peripheral portions E of the stacked color-resist layers 201 is greater than the optical density threshold, which can effectively ensure the light-shielding performance and effectively reduce the possibility of light leakage.

[0059] Specifically, in some embodiments of the present invention, each area of ​​the light-shielding stack 202 is obtained by stacking three layers of color-resistance layers 201, so that the optical density value of each area of ​​the light-shielding stack 202 is equal, and the light-shielding effect of each area of ​​the light-shielding stack 202 is similar, thereby improving the performance stability of the color filter and the display panel.

[0060] Among the plurality of color resist layers 201, the light shielding peripheral portion E of the color resist layer 201 closest to the substrate 200 is in direct contact with the substrate 200. That is, no black matrix layer is provided between the light shielding peripheral portion E of the color resist layer 201 and the substrate 200, the optical density value of the light shielding peripheral portion E of the stacked plurality of color resist layers 201 is relatively large, and the optical density value of the light shielding peripheral portion E of the stacked color resist layers 201 is close to the optical density value of the traditional black matrix, so that the light shielding effect of the light shielding peripheral portion E of the stacked color resist layers 201 is close to the light shielding effect of the traditional black matrix (Black Matrix, BM), which simplifies the process and reduces the production cost.

[0061] Please refer to Figure 8 The color filter includes: a flat layer 203 located on the multi-layer color resist layer 201.

[0062] In order to ensure uniform thickness of the color filter, a flat layer 203 is formed on the color resist layer 201. Specifically, in some embodiments of the present invention, the thickness of the flat layer 203 is in the range of 1.5 μm to 2 μm. The flatness of the flat layer 203 is ≤ 0.3 μm.

[0063] Please refer to Figure 8 , the color filter includes: a support column 204 located on the flat layer 203.

[0064] When the array substrate 200 of the liquid crystal display panel and the substrate 200 of the color filter are attached to each other, the support pillars 204 support the array substrate 200 to play a supporting role.

[0065] Correspondingly, an embodiment of the present invention further provides a display panel, wherein the display panel includes the color filter as described in any one of the above items, which will not be described in detail herein.

[0066] Accordingly, the present invention also provides a method for forming a color filter. Figures 3 to 8 , including: providing a substrate 200; forming a color resist layer 201, wherein the color resist layer 201 has at least one color resist unit U, each of the color resist units U has a color developing portion A, two non-color developing portions B and a light shielding portion, the light shielding portion includes a first sub-light shielding portion C and a second sub-light shielding portion D, the two non-color developing portions B are adjacent, the first sub-light shielding portion C is located between the two non-color developing portions B, and the second sub-light shielding portion D is located between the color developing portion A and one non-color developing portion B; stacking a plurality of the color resist layers 201 on the substrate 200, the color developing portions A of the color resist units U in each color resist layer 201 are staggered, and the light shielding portions of each layer of the color resist layer 201 are overlapped.

[0067] The steps of forming the color resist layer 201 include: providing an initial color resist layer (not shown); forming a mask layer on the initial color resist layer, wherein the mask layer exposes a portion of the surface of the initial color resist layer; and etching the initial color resist layer using the mask layer as a mask to form the color resist layer 201.

[0068] The step of forming the mask layer includes: providing a photomask; forming an initial mask layer on the initial color resist layer 201; and exposing and developing the initial mask layer using the photomask as a mask template to form the mask layer.

[0069] The light mask is a Slit light mask. The purpose of using the Slit light mask is that the widths of the first sub-light shielding portion C and the second sub-light shielding portion D are relatively small, and the use of the Slit light mask can meet the size requirements of the first sub-light shielding portion C and the second sub-light shielding portion D, thereby reducing the possibility of light leakage from the first sub-light shielding portion C and the second sub-light shielding portion D of the stacked plurality of color resist layers 201.

[0070] In summary, the light-shielding portions of each color-resisting layer 201 overlap, and the light-shielding peripheral portions E of each color-resisting layer 201 overlap. The light-shielding portions and the light-shielding peripheral portions E of the stacked multiple color-resisting layers 201 form the light-shielding stack 202. The light-shielding stack 202 has a large optical density value, which can effectively ensure the light-shielding performance and effectively reduce the possibility of light leakage; and the light-shielding portions and the light-shielding peripheral portions E of each color-resisting layer 201 overlap, so that the optical density values ​​of the light-shielding stack 202 stacked on the substrate 200 are equal, so that the light-shielding effects of each area of ​​the light-shielding stack 202 stacked on the substrate are similar, thereby improving the performance stability of the color filter and the display panel; in addition, the light-shielding portion of the color-resisting layer 201 closest to the substrate 200 is in direct contact with the substrate 200. That is, no black matrix layer is arranged between the color resist layer 201 and the substrate 200, and the light density value of the light shielding part of the stacked multiple color resist layers 201 is relatively large, which plays the role of the black matrix layer to avoid light leakage, simplifies the process flow and reduces the production cost.

[0071] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A color filter, characterized in that: include: substrate; A plurality of color resist layers, wherein the plurality of color resist layers are stacked on the substrate, the color resist layers have at least one color resist unit, and the color resist units each have a color developing portion, two non-color developing portions, and a light shielding portion, the light shielding portion includes a first sub-light shielding portion and a second sub-light shielding portion, the two non-color developing portions are adjacent, the first sub-light shielding portion is located between the two non-color developing portions, and the second sub-light shielding portion is located between the color developing portion and one non-color developing portion, the color developing portions of the color resist units in each color resist layer are staggered with each other, and the light shielding portions of each color resist layer overlap.

2. The color filter according to claim 1, wherein: The color developing portion and the non-color developing portion have the same area.

3. The color filter according to claim 1, wherein: Among the plurality of color-resist layers, a light-shielding portion of the color-resist layer closest to the substrate is in direct contact with the substrate.

4. The color filter according to claim 1, wherein: The optical density value of the light-shielding portion of the plurality of stacked color-resist layers is greater than a preset optical density threshold.

5. The color filter according to claim 1, wherein: The color-resist layer further includes: a light-shielding peripheral portion, the light-shielding peripheral portion surrounding the color-resist unit; The light-shielding peripheral portions of the various color-resist layers overlap.

6. The color filter according to claim 5, wherein: Among the plurality of color-resist layers, a light-shielding peripheral portion of the color-resist layer closest to the substrate is in direct contact with the substrate.

7. The color filter according to claim 1, wherein: The width of the first sub-light-shielding portion is in the range of 5 μm to 15 μm; the width of the second sub-light-shielding portion is in the range of 5 μm to 15 μm.

8. The color filter according to claim 1, wherein: The number of the color resist layers is greater than or equal to 3.

9. The color filter according to claim 1 or 8, characterized in that: The color resist layer includes: a blue color resist layer, a green color resist layer and a red color resist layer.

10. The color filter according to claim 1, wherein: Also includes: A planar layer is located on the plurality of color resist layers.

11. The color filter according to claim 10, wherein: Also includes: A support column is located on the flat layer.

12. A display panel, characterized in that: The invention comprises the color filter as claimed in any one of claims 1 to 11.

13. A method for forming a color filter, characterized in that: include: providing a substrate; Forming a color resist layer, the color resist layer having at least one color resist unit, each of the color resist units having a color developing portion, two non-color developing portions and a light shielding portion, the light shielding portion comprising a first sub-light shielding portion and a second sub-light shielding portion, the two non-color developing portions are adjacent, the first sub-light shielding portion is located between the two non-color developing portions, and the second sub-light shielding portion is located between the color developing portion and one non-color developing portion; A plurality of the color resist layers are stacked on the substrate, the color developing parts of the color resist units in each color resist layer are staggered, and the light shielding parts of each color resist layer are overlapped.

14. The method for forming a color filter according to claim 13, wherein: The step of forming the color resist layer comprises: Providing an initial color resist layer; forming a mask layer on the initial color resist layer, wherein the mask layer exposes a portion of the surface of the initial color resist layer; The initial color resist layer is etched using the mask layer as a mask to form the color resist layer.

15. The method for forming a color filter according to claim 14, wherein: The step of forming the mask layer comprises: Provide a light mask; forming an initial mask layer on the initial color resist layer; The initial mask layer is exposed and developed using the photomask as a mask template to form the mask layer.

16. The method for forming a color filter according to claim 15, wherein: The photomask is a Slit photomask.