Display panel, display device and preparation method

Abstract

The invention relates to the technical field of display panels, particularly provides a display panel, a display device and a preparation method, and aims to solve the problem that a black matrix is easy to have defects in an existing preparation method. In order to achieve the purpose, the display panel comprises an organic insulation pattern, a first color film pattern and a black matrix which are located on a packaging layer, the organic insulation pattern is provided with a first opening, and the first color film pattern comprises a first color film pattern part located in a first opening area and a second color film pattern part located on the organic insulation pattern; the black matrix is located on the second color film pattern part. The material layer forming the black matrix is arranged on the material layer forming the first color film pattern, and the material layer forming the first color film pattern can be arranged to be relatively flat, so that the thickness of the material layer forming the black matrix at each position is relatively uniform, and the thickness consistency of the black matrix formed after development is relatively good and is not easy to remain.

Description

Technical Field

[0001] The present disclosure relates to the technical field of display panels, and specifically provides a display panel, a display device, and a manufacturing method thereof. Background Art

[0002] In the structure of some display panels, an organic insulating pattern and a black matrix are arranged under the color film layer. Due to process defects, the degree of development during the formation of the black matrix is ​​difficult to control, and excessive development often causes the edge of the shading layer to peel off and allow light to pass through, or insufficient development causes a larger range of the shading layer. Summary of the invention

[0003] The present disclosure aims to solve the problems of the prior art and provides a display panel, a display device and a manufacturing method thereof.

[0004] In a first aspect, the present disclosure provides a display panel, comprising: a substrate; a light-emitting unit layer located on the substrate, comprising a first color light-emitting element, a second color light-emitting element and a third color light-emitting element defined by a pixel defining layer; an encapsulation layer located on the light-emitting unit; an organic insulating pattern and a first opening area, a second opening area and a third opening area surrounded by the organic insulating pattern, wherein the orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate, and the first opening area, the second opening area and the third opening area correspond to the first color light-emitting element, the second color light-emitting element and the third color light-emitting element respectively; a first color color film pattern, comprising a first color film pattern portion located in the first opening area and a second color film pattern portion located on the organic insulating pattern; a black matrix, located on the second color film pattern portion; a second color color film pattern, at least comprising a third color film pattern portion located in the second opening area; a third color color film pattern, at least comprising a fourth color film pattern portion located in the third opening area; the refractive index of the organic insulating pattern is less than the refractive index of any one of the first color color film pattern, the second color color film pattern and the third color color film pattern.

[0005] In some exemplary embodiments, the spacing between the orthographic projection edge of the organic insulating pattern on the substrate and the orthographic projection edge of the pixel defining layer on the substrate is -2μm to 4μm; and / or, the spacing between the orthographic projection edge of the second color filter pattern portion on the substrate and the orthographic projection edge of the pixel defining layer on the substrate is 0μm to 6μm; and / or, the spacing between the orthographic projection edge of the black matrix on the substrate and the orthographic projection edge of the pixel defining layer on the substrate is 3μm to 6μm.

[0006] In some exemplary embodiments, the width of the second color filter pattern portion is greater than 4 μm.

[0007] In some exemplary embodiments, the second color filter pattern further includes a fifth color filter pattern portion extending above the black matrix surrounding the second opening area; and / or the third color filter pattern further includes a sixth color filter pattern portion extending above the black matrix surrounding the third opening area.

[0008] In some exemplary embodiments, a width of the fifth color filter pattern portion or the sixth color filter pattern portion is greater than 6 μm.

[0009] In some exemplary embodiments, the thickness of the third color filter pattern portion and the fourth color filter pattern portion is greater than the thickness of the first color filter pattern portion.

[0010] In some exemplary embodiments, the surface of the first color filter pattern portion away from the substrate has a concave surface; and / or the second color filter pattern and / or the third color filter pattern contacts at least a portion of the sidewall of the black matrix.

[0011] In some exemplary embodiments, the colors of the first color filter pattern, the second color filter pattern, and the third color filter pattern are respectively one of red, green, and blue, and are different from each other.

[0012] In some exemplary embodiments, the display panel further includes a touch layer located between the organic insulation pattern and the encapsulation layer.

[0013] In some exemplary embodiments, the display panel further includes: a planarization layer covering the black matrix and the first color filter pattern, the second color filter pattern, and the third color filter pattern.

[0014] In a second aspect, the present disclosure provides a method for preparing a display panel, comprising: forming a light-emitting unit layer on a substrate, wherein the light-emitting unit layer comprises a first color light-emitting element, a second color light-emitting element and a third color light-emitting element defined by a pixel defining layer; forming an encapsulation layer on the light-emitting unit layer; forming an organic insulating pattern and a first opening area, a second opening area and a third opening area surrounded by the organic insulating pattern on the encapsulation layer, wherein an orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with an orthographic projection of the pixel defining layer on the substrate, and the first opening area, the second opening area and the third opening area are respectively aligned with the first color light-emitting element. The light element, the second color light-emitting element and the third color light-emitting element correspond to each other; a first color color filter layer is formed; a shading layer is formed on the first color color filter layer; the shading layer and the first color color filter layer are patterned, and only the first color color filter layer in the first opening area, the first color color filter layer and the shading layer on the organic insulation pattern are retained, wherein the retained first color color filter layer constitutes a first color color filter pattern, and the retained shading layer constitutes a black matrix; a second color color filter pattern and a third color color filter pattern are formed, wherein the second color color filter pattern at least includes a portion located in the second opening area, and the third color filter pattern at least includes a portion located in the third opening area.

[0015] In some exemplary embodiments, the light-shielding layer and the first color filter layer are patterned to retain only the first color filter layer in the first opening area, the first color filter layer and the light-shielding layer on the organic insulation pattern, including: denaturing the first color filter layer and the light-shielding layer in the second opening area and the third opening area and denaturing the light-shielding layer in the first opening area through a halftone mask; and removing the denatured light-shielding layer and the first color filter layer through development.

[0016] In some exemplary embodiments, forming the second color filter pattern and the third color filter pattern includes: forming the second color filter pattern to extend above the black matrix surrounding the second opening area; and / or forming the third color filter pattern to extend above the black matrix surrounding the third opening area.

[0017] In some exemplary embodiments, the method further includes: forming a planarization layer covering the black matrix and the first color filter pattern, the second color filter pattern, and the third color filter pattern.

[0018] In some exemplary embodiments, before forming the organic insulation pattern, the method further includes: forming a touch layer on the encapsulation layer.

[0019] In a third aspect, the present disclosure provides a display device, including a display panel prepared by the above method or the display device as described above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The display panel provided by the present disclosure includes: a substrate; a light-emitting unit layer located on the substrate, including a first color light-emitting element, a second color light-emitting element and a third color light-emitting element defined by a pixel defining layer; an encapsulation layer located on the light-emitting unit; an organic insulating pattern and a first opening area, a second opening area and a third opening area surrounded by the organic insulating pattern, wherein the orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate, and the first opening area, the second opening area and the third opening area correspond to the first color light-emitting element, the second color light-emitting element and the third color light-emitting element respectively; a first color color film pattern, including a first color film pattern portion located in the first opening area and a second color film pattern portion located on the organic insulating pattern; a black matrix, located on the second color film pattern portion; a second color color film pattern, at least including a third color film pattern portion located in the second opening area; a third color color film pattern, at least including a fourth color film pattern portion located in the third opening area; and a refractive index of the organic insulating pattern is less than the refractive index of any one of the first color color film pattern, the second color color film pattern and the third color color film pattern. The black matrix is ​​located on the first color film pattern, and the material layer forming the black matrix is ​​arranged on the material layer forming the first color film pattern. The material layer forming the first color film pattern can be arranged to be relatively flat, so that the thickness of the material layer forming the black matrix is ​​also relatively uniform in various places. In the process of forming the black matrix by using the composition process, the exposure degree of the material layer in various places is also roughly the same. Therefore, the thickness consistency of the black matrix formed after development is better and it is not easy to remain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings, in which:

[0023] Figure 1A It is a cross-sectional view of a display panel;

[0024] Figure 1B to Figure 1C It is a cross-sectional view of a display panel during the preparation process;

[0025] Figure 2 is a cross-sectional view of a display panel provided by at least one embodiment of the present disclosure;

[0026] Figure 3 is a cross-sectional view of another display panel provided by at least one embodiment of the present disclosure;

[0027] Figure 4 is a cross-sectional view of another display panel provided by at least one embodiment of the present disclosure;

[0028] Figure 5is a cross-sectional view of yet another display panel provided by at least one embodiment of the present disclosure;

[0029] FIG. 6A to FIG. 6C The present invention is a cross-sectional view of a display panel during the preparation process provided by at least one embodiment of the present disclosure.

[0030] Description of reference numerals:

[0031] 1. Substrate; 2. Light-emitting unit layer; EL1. First color light-emitting element; EL2. Second color light-emitting element; EL3. Third color light-emitting element; 21. Pixel defining layer; 3. Encapsulation layer; 4. Organic insulation pattern; 41. First opening area; 42. Second opening area; 43. Third opening area; 5. First color color filter pattern; 50. First color color filter layer; 51. First color filter pattern portion; 52. Second color filter pattern portion; 6. Black matrix; 60. Shading layer; 7. Second color color filter pattern; 71. Third color filter pattern portion; 72. Fifth color filter pattern portion; 8. Third color color filter pattern; 81. Fourth color filter pattern portion; 82. Sixth color filter pattern portion; 9. Planarization layer; 10. Touch layer; 101. First metal layer; 102. Second metal layer; 103. Touch insulation layer. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present disclosure and are not intended to limit the protection scope of the present disclosure.

[0033] It should be noted that in the description of the present disclosure, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In addition, it should be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0035] like Figure 1AAs shown, the display panel includes an array substrate, a light-emitting unit layer 2 and an encapsulation layer 3 which are arranged in sequence, and the light-emitting unit layer 2 includes a first color light-emitting element EL1, a second color light-emitting element EL2 and a third color light-emitting element EL3 defined by a pixel defining layer 21. The array substrate includes a substrate 1 and a TFT (Thin Film Transistor) functional device, and the TFT functional device is used to drive the first color light-emitting element EL1, the second color light-emitting element EL2 and the third color light-emitting element EL3 to emit light.

[0036] The encapsulation layer 3 has an organic insulating pattern 4 and a black matrix 6 on the side away from the substrate 1, and the orthographic projection of the black matrix 6 on the substrate 1 falls within the orthographic projection range of the organic insulating pattern 4 on the substrate 1. The organic insulating pattern 4 surrounds the first opening area 41, the second opening area 42 and the third opening area 43, and the first opening area 41, the second opening area 42 and the third opening area 43 are filled with the first color filter pattern 5, the second color filter pattern 6 and the third color filter pattern 7 respectively. The refractive index of the color filter pattern (the first color filter pattern 5, the second color filter pattern 6 and the third color filter pattern 7) is greater than the refractive index of the organic insulating pattern 4. After the light emitted from the light-emitting unit layer 2 is projected toward the side wall of the organic insulating pattern 4 through the color filter pattern, total reflection can occur, so that the light is reflected to the central area, thereby improving the light output rate.

[0037] Among them, Figure 1B and Figure 1C As shown, the process of forming the organic insulating pattern 4 and the black matrix 6 is as follows:

[0038] S1. An organic insulating pattern 4 is formed on a side of the encapsulation layer 3 away from the substrate 1 by a composition process. The organic insulating pattern 4 surrounds a first opening area 41, a second opening area 42 and a third opening area 43. The first opening area 41, the second opening area 42 and the third opening area 43 correspond to the light emission of the first color light-emitting element EL1, the second color light-emitting element EL2 and the third color light-emitting element EL3 respectively.

[0039] S2. A black matrix 6 is formed on the organic insulating pattern 4 by using a patterning process. Specifically, a light shielding layer 60 is first formed, the light shielding layer 60 covers the organic insulating pattern 4 and the first opening area 41, the second opening area 42 and the third opening area 43, and then the light shielding layer 60 is exposed through a mask, and then the light shielding layer 60 is developed, and a portion of the light shielding layer 60 located on the organic insulating pattern 4 is retained to form the black matrix 6.

[0040] Among them, it is difficult to completely remove the light-shielding layer 60 located on the side wall of the organic insulating pattern 4. If the development time is extended to remove the light-shielding layer 60 located on the side wall of the organic insulating pattern 4, the light-shielding layer 60 located on the top of the organic insulating pattern 4 will also be damaged, resulting in light leakage at the edge; if the development time is insufficient, it is difficult to effectively remove the light-shielding layer 60 located on the side wall of the organic insulating pattern 4, affecting the total reflection of light at the side wall of the organic insulating pattern 4, thereby affecting the light output rate.

[0041] Based on this, the present disclosure provides a display panel, comprising: a substrate; a light-emitting unit layer located on the substrate, comprising a first color light-emitting element, a second color light-emitting element and a third color light-emitting element defined by a pixel defining layer; an encapsulation layer located on the light-emitting unit; an organic insulating pattern and a first opening area, a second opening area and a third opening area surrounded by the organic insulating pattern, wherein the orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate, and the first opening area, the second opening area and the third opening area correspond to the first color light-emitting element, the second color light-emitting element and the third color light-emitting element respectively; a first color color film pattern, comprising a first color film pattern portion located in the first opening area and a second color film pattern portion located on the organic insulating pattern; a black matrix, located on the second color film pattern portion; a second color color film pattern, at least comprising a third color film pattern portion located in the second opening area; a third color color film pattern, at least comprising a fourth color film pattern portion located in the third opening area; a refractive index of the organic insulating pattern is less than the refractive index of any one of the first color color film pattern, the second color color film pattern and the third color color film pattern.

[0042] The display panels of some embodiments of the present disclosure are described below through several specific embodiments.

[0043] Figure 2 is a cross-sectional view of a display panel provided by at least one embodiment of the present disclosure.

[0044] like Figure 2 As shown, the display panel includes a substrate 1 and an array substrate (not shown in the figure), a light-emitting unit layer 2 and an encapsulation layer 3 sequentially arranged on the substrate 1. Among them, the light-emitting unit layer 2 includes a pixel defining layer 21, and the pixel defining layer 21 defines a first color light-emitting element EL1, a second color light-emitting element EL2 and a third color light-emitting element EL3. The array substrate is used to drive the first color light-emitting element EL1, the second color light-emitting element EL2 and the third color light-emitting element EL3 to emit light. For example, the colors emitted by the first color light-emitting element EL1, the second color light-emitting element EL2 and the third color light-emitting element EL3 can be the same (such as all white light) or different.

[0045] An organic insulating pattern 4 is provided on the encapsulation layer 3. The organic insulating pattern 4 surrounds and forms a first opening area 41, a second opening area 42 and a third opening area 43, and the first opening area 41, the second opening area 42 and the third opening area 43 expose the encapsulation layer 3. The first opening area 41, the second opening area 42 and the third opening area 43 correspond to the first color light emitting element EL1, the second color light emitting element EL2 and the third color light emitting element EL3, respectively. For example, the cross-sectional shape of the organic insulating pattern 4 is an upright trapezoid, and the slope angle of the side wall of the organic insulating pattern 4 is 50° to 85°.

[0046] For example, the distance d1 between the orthogonal projection edge of the organic insulating pattern 4 on the substrate 1 and the orthogonal projection edge of the pixel defining layer 21 on the substrate 1 is -2 μm to 4 μm. When the distance d1 between the orthogonal projection edge of the organic insulating pattern 4 on the substrate 1 and the orthogonal projection edge of the pixel defining layer 21 on the substrate 1 is a negative value, the orthogonal projection edge of the organic insulating pattern 4 on the substrate 1 exceeds the orthogonal projection range of the pixel defining layer 21 on the substrate 1; when the distance d1 between the orthogonal projection edge of the organic insulating pattern 4 on the substrate 1 and the orthogonal projection edge of the pixel defining layer 21 on the substrate 1 is a positive value, the orthogonal projection of the organic insulating pattern 4 on the substrate 1 falls within the orthogonal projection range of the pixel defining layer 21 on the substrate 1.

[0047] The packaging glue is provided with a color filter pattern and a black matrix 6. The color filter pattern includes a first color filter pattern 5, a second color filter pattern 7 and a third color filter pattern 8. For example, the colors of the first color filter pattern 5, the second color filter pattern 7 and the third color filter pattern 8 are respectively one of red, green and blue and are different from each other.

[0048] The first color filter pattern 5 covers the first opening area 41 and the organic insulating pattern 4. The portion of the first color filter pattern 5 located in the first opening area 41 is the first color filter pattern portion 51, and the portion located on the organic insulating pattern 4 is the second color filter pattern portion 52. For example, the color of the first color filter pattern 5 is any one of red, green, and blue. For example, the surface of the first color filter pattern portion away from the substrate is a concave surface. For example, the width d4 of the second color filter pattern portion 52 is greater than 4μm. For example, the spacing d2 between the orthographic projection edge of the second color filter pattern portion 52 on the substrate 1 and the orthographic projection edge of the pixel defining layer 21 on the substrate 1 is 0μm to 6μm.

[0049] The black matrix 6 is located above the second color filter pattern portion 52, and the orthographic projection of the black matrix 6 on the substrate 1 falls within the orthographic projection range of the second color filter pattern portion 52 on the substrate 1. For example, the distance d3 between the orthographic projection edge of the black matrix 6 on the substrate 1 and the orthographic projection edge of the pixel definition layer 21 on the substrate 1 is 3 μm to 6 μm.

[0050] The second color filter pattern 7 includes at least a third color filter pattern portion 71 located in the second opening area 42, and the third color filter pattern 8 includes at least a fourth color filter pattern portion 81 located in the third opening area 43, and the third color filter pattern portion 71 and the fourth color filter pattern portion 81 can both contact at least a portion of the sidewalls of the organic insulating pattern 4 and the black matrix 6. For example, the thickness of the third color filter pattern portion 71 and the fourth color filter pattern portion 81 is greater than the thickness of the first color filter pattern portion 51, so as to ensure that the third color filter pattern portion 71 and the fourth color filter pattern portion 81 can both contact at least a portion of the sidewalls of the organic insulating pattern 4 and the black matrix 6. For example, the thickness of the first color filter pattern portion 51 is greater than or equal to 3 μm.

[0051] The refractive index of the organic insulating pattern 4 is less than the refractive index of any one of the first color filter pattern 5, the second color filter pattern 7 and the third color filter pattern 8. After the light emitted from the light-emitting unit layer 2 (such as the first light-emitting unit, the second light-emitting unit and the third light-emitting unit) passes through the color filter pattern (such as the first color filter pattern 5, the second color filter pattern 7 and the third color filter pattern 8) and is directed to the side wall of the organic insulating pattern 4, total reflection can occur, so that the light is reflected to the central area, thereby improving the light extraction rate. For example, the refractive index of the organic insulating pattern 4 is 1.3-1.5, and the refractive index of the color filter pattern is 1.6-2.0.

[0052] Figure 3 is a cross-sectional view of another display panel provided by at least one embodiment of the present disclosure.

[0053] In some examples, such as Figure 3 As shown, the second color filter pattern 7 further includes a fifth color filter pattern portion 72 extending to the top of the black matrix 6 surrounding the second opening area 42, and the third color filter pattern 8 further includes a sixth color filter pattern portion 82 extending to the top of the black matrix 6 surrounding the third opening area 43. For example, the thickness of the first color filter pattern portion 5 is 2 μm to 4 μm, and the thickness of the third color filter pattern portion 71 and the fourth color filter pattern portion 81 is 3 μm to 6 μm. For example, the width d5 ​​of the fifth color filter pattern portion 72 and / or the width d6 of the sixth color filter pattern portion 82 is greater than 6 μm.

[0054] A planarization layer 9 is disposed on the color filter pattern, and the planarization layer 9 covers the first color filter pattern 5 , the second color filter pattern 7 , the third color filter pattern 8 and the black matrix 6 .

[0055] In some examples, the display panel further includes a touch layer 10, and the touch layer 10 is located between the organic insulation pattern 4 and the encapsulation layer 3. The touch layer 10 includes at least one metal film layer.

[0056] Figure 4 is a cross-sectional view of another display panel provided by at least one embodiment of the present disclosure.

[0057] For example, Figure 4 As shown, the touch layer 10 is a single-layer first metal layer 101 and a touch insulating layer 103 located on the first metal layer 101. For example, the first metal layer 101 is formed into first touch electrodes and second touch electrodes, wherein each first touch electrode and each second touch electrode are led out through a separate touch lead.

[0058] Figure 5 is a cross-sectional view of yet another display panel provided by at least one embodiment of the present disclosure.

[0059] For example, Figure 5 As shown, the touch control layer 10 includes a first metal layer 101 and a second metal layer 102 , and a touch control insulating layer 103 is disposed between the first metal layer 101 and the second metal layer 102 .

[0060] In the first example, the touch layer 10 is a self-capacitive touch structure, and the first metal layer 101 is formed into first touch electrodes and second touch electrodes, wherein the first touch electrodes are connected in series in one direction, and two adjacent second touch electrodes are electrically connected in another direction through the second metal layer 102.

[0061] In the second example, the touch layer 10 is a self-capacitive touch structure, and the second metal layer 102 is formed into first touch electrodes and second touch electrodes, wherein the first touch electrodes are connected in series in one direction, and two adjacent second touch electrodes are electrically connected through the first metal layer 101 in another direction.

[0062] In the third example, the touch layer 10 is a mutual capacitive touch structure, the first metal layer 101 is formed as a first touch electrode, and the second metal layer 102 is formed as a second touch electrode.

[0063] The present disclosure also provides a method for preparing a display panel, comprising: forming a light-emitting unit layer on a substrate, wherein the light-emitting unit layer comprises a first color light-emitting element, a second color light-emitting element and a third color light-emitting element defined by a pixel defining layer; forming an encapsulation layer on the light-emitting unit layer; forming an organic insulating pattern and a first opening area, a second opening area and a third opening area surrounded by the organic insulating pattern on the encapsulation layer, wherein the orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate, and the first opening area, the second opening area and the third opening area are respectively aligned with the first color light-emitting element, the second color light-emitting element and the third color light-emitting element. The second color light-emitting element corresponds to the third color light-emitting element; a first color color filter layer is formed; a shading layer is formed on the first color color filter layer; the shading layer and the first color color filter layer are patterned, and only the first color color filter layer in the first opening area, the first color color filter layer and the shading layer on the organic insulation pattern are retained, wherein the retained first color color filter layer constitutes a first color color filter pattern, and the retained shading layer constitutes a black matrix; a second color color filter pattern and a third color color filter pattern are formed, wherein the second color color filter pattern at least includes a portion located in the second opening area, and the third color filter pattern at least includes a portion located in the third opening area.

[0064] The following describes the method for preparing the display panel according to some embodiments of the present disclosure through several specific examples.

[0065] FIG. 6A to FIG. 6C yes Figure 2 The cross-sectional view of the display panel during the preparation process is shown.

[0066] The present disclosure provides a first method for preparing a display panel, comprising:

[0067] like Fig. 6A As shown, a substrate 1 is provided, and an array substrate (not shown in the figure), a light-emitting unit layer 2 and an encapsulation layer 3 are sequentially formed on the substrate 1. The light-emitting unit layer 2 includes a pixel defining layer 21, and the pixel defining layer 21 defines a first color light-emitting element EL1, a second color light-emitting element EL2 and a third color light-emitting element EL3. The array substrate is used to drive the first color light-emitting element EL1, the second color light-emitting element EL2 and the third color light-emitting element EL3 to emit light. For example, the colors emitted by the first color light-emitting element EL1, the second color light-emitting element EL2 and the third color light-emitting element EL3 may be the same (such as white light) or different.

[0068] For example, when the display panel is a flexible display panel, the provided substrate 1 may be a flexible substrate such as polyimide (PI), and when the display panel is a rigid display panel, the substrate 1 may be a rigid substrate such as glass or quartz.

[0069] An organic insulating pattern 4 and a first opening region 41, a second opening region 42 and a third opening region 43 surrounded by the organic insulating pattern 4 are formed on the encapsulation layer 3 by a patterning process. The first opening region 41, the second opening region 42 and the third opening region 43 correspond to the first color light emitting element EL1, the second color light emitting element EL2 and the third color light emitting element EL3, respectively. For example, a patterning process includes processes such as formation of photoresist, exposure, development and etching.

[0070] A first color filter pattern 5 and a black matrix 6 are sequentially formed on the organic insulating pattern 4 and the exposed encapsulation layer 3. For example, the first color filter pattern 5 covers the first opening area 41 and at least part of the organic insulating pattern 4, wherein the part of the first color filter pattern 5 not covering the first opening area 41 surrounds the second opening area 42 and the third opening area 43. For example, the black matrix 6 surrounds the first opening area 41, the second opening area 42 and the third opening area 43, and the orthographic projection of the black matrix 6 on the substrate 1 falls within the orthographic projection range of the first color filter pattern 5 on the substrate 1.

[0071] The process of sequentially forming the first color filter pattern 5 and the black matrix 6 on the organic insulating pattern 4 and the exposed encapsulation layer 3 mainly includes: forming a first color filter layer 50 on the organic insulating pattern 4 and the exposed encapsulation layer 3, and forming a light shielding layer 60 on the first color filter layer 50; patterning the light shielding layer 60 and the first color filter layer 50, and only retaining the first color filter layer 50 in the first opening area 41, the first color filter layer 50 and the light shielding layer 60 on the organic insulating pattern 4, wherein the retained first color filter layer 50 constitutes the first color filter pattern 5, and the retained light shielding layer 60 constitutes the black matrix 6. Since the light shielding layer 60 is located on the first color filter layer 50, and the first color filter layer 50 can be arranged relatively flat, the thickness of the light shielding layer 60 is relatively uniform at various locations, and the exposure degree of the light shielding layer 60 at various locations in the process of forming the black matrix 6 by the composition process is also roughly the same, so the thickness consistency of the black matrix 6 formed after the light shielding layer 60 is developed is good and it is not easy to remain.

[0072] For example, Figure 6B and Figure 6C As shown, a first color filter layer 50 is formed on the organic insulating pattern 4 and the exposed encapsulation layer 3, and a light shielding layer 60 is formed on the first color filter layer 50; the light shielding layer 60 is patterned by a composition process, and the light shielding layer 60 located above the first opening area 41, the second opening area 42 and the third opening area 43 is removed, and the retained light shielding layer 60 constitutes a black matrix 6; the first color filter layer 50 is patterned by a composition process, and the first color filter layer 50 located in the second opening area 42 and the third opening area 42 is removed, and the retained first color filter layer 50 is located in the first opening area 41 and below the black matrix 6 to constitute a first color filter pattern 5.

[0073] For example, combined with Figure 6C As shown, a half-tone mask is formed on the light-shielding layer 60, and the half-tone mask is semi-transparent at the first opening area 41 and fully transparent at the second opening area 42 and the third opening area 43; the half-tone mask is used for exposure, so that the first color filter layer 50 covering the second opening area 42 and the third opening area 43 is denatured and the light-shielding layer 60 covering the first opening area 41 is denatured, and most of the first color filter layer 50 covering the first opening area 41 is not denatured; the denatured light-shielding layer 60 and the first color filter layer 50 are removed by development, and the first color filter layer 50 retained after development constitutes the first color filter pattern 5, and the retained light-shielding layer 60 constitutes the black matrix 6. In this way, the first color filter pattern 5 and the black matrix 6 can be formed simultaneously with only one composition process, thereby simplifying the process flow.

[0074] Since the first color filter layer 50 is also exposed to a certain degree at the first opening area 41 , the first color filter pattern 5 formed after development forms a concave surface on the upper surface of the first opening area 41 .

[0075] like Figure 2 As shown, a second color filter pattern 7 and a third color filter pattern 8 are formed, wherein the second color filter pattern 7 at least includes a portion located in the second opening area 42 , and the third color filter pattern 8 at least includes a portion located in the third opening area 43 .

[0076] For example, Figure 2 As shown, the second color filter pattern 7 is only located in the second opening area 42, and the third color filter pattern 8 is only located in the third opening area 43. The thickness of the second color filter pattern 7 and the third color filter pattern 8 are both greater than the thickness of the first color filter pattern.

[0077] For example, Figure 3 As shown, the second color filter pattern 7 extends to the top of the black matrix 6 surrounding the second opening area 42 , and the third color filter pattern 8 extends to the top of the black matrix 6 surrounding the third opening area 43 .

[0078] A planarization layer 9 is formed, and the planarization layer 9 covers the black matrix 6 , the first color filter pattern 5 , the second color filter pattern 7 and the third color filter pattern 8 .

[0079] In some examples, before forming the organic insulating pattern 4, a touch layer 10 is formed on the encapsulation layer 3. The touch layer 10 includes at least one metal film layer.

[0080] For example, Figure 4As shown, the touch layer 10 is a single metal film layer. For example, the single metal film layer is formed into a first touch electrode and a second touch electrode, wherein each first touch electrode and each second touch electrode are led out through a separate touch lead.

[0081] For example, Figure 5 As shown, the touch control layer 10 includes a first metal layer 101 and a second metal layer 102 , and a touch control insulating layer 103 is disposed between the first metal layer 101 and the second metal layer 102 .

[0082] In summary, the method for manufacturing a display panel provided by the present disclosure has at least the following advantages:

[0083] (1) A first color filter layer 50 is formed on the organic insulating pattern 4 and the exposed encapsulation layer 3, and a light shielding layer 60 is formed on the first color filter layer 50; the light shielding layer 60 and the first color filter layer 50 are patterned, and only the first color filter layer 50 in the first opening area 41, the first color filter layer 50 and the light shielding layer 60 on the organic insulating pattern 4 are retained, wherein the retained first color filter layer 50 constitutes the first color filter pattern 5, and the retained light shielding layer 60 constitutes the black matrix 6. Since the light shielding layer 60 is located on the first color filter layer 50, and the first color filter layer 50 can be arranged relatively flat, the thickness of the light shielding layer 60 is relatively uniform at various locations. In the process of forming the black matrix 6 by the patterning process, the exposure degree of the light shielding layer 60 at various locations is also roughly the same. Therefore, the thickness consistency of the black matrix 6 formed after the light shielding layer 60 is developed is good and it is not easy to remain.

[0084] (2) A half-tone mask is formed on the light-shielding layer 60, wherein the half-tone mask is semi-transmissive at the first opening area 41 and fully transmissive at the second opening area 42 and the third opening area 43; exposure is performed using the half-tone mask to denature the first color filter layer 50 covering the second opening area 42 and the third opening area 43 and to denature the light-shielding layer 60 covering the first opening area 41, while most of the first color filter layer 50 covering the first opening area 41 is not denatured; the denatured light-shielding layer 60 and the first color filter layer 50 are removed by development, and the first color filter layer 50 retained after development constitutes the first color filter pattern 5, and the retained light-shielding layer 60 constitutes the black matrix 6. In this way, the first color filter pattern 5 and the black matrix 6 can be formed simultaneously with only one patterning process, thereby simplifying the process flow.

[0085] At least one embodiment of the present disclosure further provides a display device, including the above-mentioned display panel. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a car display screen, etc., and the embodiments of the present disclosure are not limited to this.

[0086] There are a few points to note:

[0087] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0088] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be intermediate elements.

[0089] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0090] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; A light-emitting unit layer located on the substrate includes a first color light-emitting element, a second color light-emitting element and a third color light-emitting element defined by a pixel defining layer; an encapsulation layer located on the light-emitting unit; an organic insulating pattern and a first opening region, a second opening region and a third opening region surrounded by the organic insulating pattern, wherein an orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with an orthographic projection of the pixel defining layer on the substrate, and the first opening region, the second opening region and the third opening region correspond to the first color light emitting element, the second color light emitting element and the third color light emitting element, respectively; A first color filter pattern, comprising a first color filter pattern portion located in the first opening area and a second color filter pattern portion located on the organic insulation pattern; A black matrix, located on the second color filter pattern portion; The second color filter pattern at least includes a third color filter pattern portion located in the second opening area; The third color filter pattern at least includes a fourth color filter pattern portion located in the third opening area; The refractive index of the organic insulating pattern is smaller than the refractive index of any one of the first color filter pattern, the second color filter pattern and the third color filter pattern.

2. The display panel according to claim 1, characterized in that: The distance between the orthographic projection edge of the organic insulating pattern on the substrate and the orthographic projection edge of the pixel definition layer on the substrate is -2 μm to 4 μm; and / or, The distance between the orthographic projection edge of the second color filter pattern portion on the substrate and the orthographic projection edge of the pixel definition layer on the substrate is 0 μm to 6 μm; and / or, The distance between the orthographic projection edge of the black matrix on the substrate and the orthographic projection edge of the pixel definition layer on the substrate is 3 μm to 6 μm.

3. The display panel according to claim 1, characterized in that: The width of the second color filter pattern portion is greater than 4 μm.

4. The display panel according to claim 1, characterized in that: The second color filter pattern further includes a fifth color filter pattern portion extending above the black matrix surrounding the second opening area; and / or, The third color filter pattern further includes a sixth color filter pattern portion extending above the black matrix surrounding the third opening area.

5. The display panel according to claim 4, characterized in that: The width of the fifth color filter pattern portion or the sixth color filter pattern portion is greater than 6 μm.

6. The display panel according to claim 1, characterized in that: The thickness of the third color filter pattern portion and the fourth color filter pattern portion is greater than the thickness of the first color filter pattern portion.

7. The display panel according to claim 1, characterized in that: The surface of the first color filter pattern portion away from the substrate is a concave surface; and / or, The second color filter pattern and / or the third color filter pattern are in contact with at least a portion of the sidewall of the black matrix.

8. The display panel according to claim 1, characterized in that: The colors of the first color filter pattern, the second color filter pattern and the third color filter pattern are respectively one of red, green and blue and are different from each other.

9. The display panel according to claim 1, characterized in that: The display panel further includes: A touch layer is located between the organic insulating pattern and the encapsulation layer.

10. The display panel according to claim 1, characterized in that: The display panel further includes: The planarization layer covers the black matrix and the first color filter pattern, the second color filter pattern and the third color filter pattern.

11. A method for preparing a display panel, characterized in that: include: forming a light-emitting unit layer on a substrate, wherein the light-emitting unit layer includes a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element defined by a pixel defining layer; forming an encapsulation layer on the light-emitting unit layer; forming an organic insulating pattern and a first opening region, a second opening region, and a third opening region surrounded by the organic insulating pattern on the encapsulation layer, wherein an orthographic projection of the organic insulating pattern on the substrate at least partially overlaps with an orthographic projection of the pixel defining layer on the substrate, and the first opening region, the second opening region, and the third opening region correspond to the first color light-emitting element, the second color light-emitting element, and the third color light-emitting element, respectively; forming a first color film layer; forming a light shielding layer on the first color filter layer; Patterning the light shielding layer and the first color filter layer, only retaining the first color filter layer in the first opening area, the first color filter layer on the organic insulation pattern and the light shielding layer, wherein the retained first color filter layer constitutes a first color filter pattern, and the retained light shielding layer constitutes a black matrix; A second color filter pattern and a third color filter pattern are formed, wherein the second color filter pattern at least includes a portion located in the second opening area, and the third color filter pattern at least includes a portion located in the third opening area.

12. The method for preparing a display panel according to claim 11, characterized in that: The step of patterning the light shielding layer and the first color filter layer to retain only the first color filter layer in the first opening area, the first color filter layer on the organic insulation pattern, and the light shielding layer includes: Denature the first color filter layer and the light shielding layer in the second opening area and the third opening area and denature the light shielding layer in the first opening area through a half-tone mask; The denatured light-shielding layer and the first color filter layer are removed by development.

13. The method for preparing a display panel according to claim 11, characterized in that: The forming of the second color filter pattern and the third color filter pattern comprises: forming the second color filter pattern to extend above the black matrix surrounding the second opening area; and / or The third color filter pattern is formed to extend above the black matrix surrounding the third opening area.

14. The method for preparing a display panel according to any one of claims 11 to 13, characterized in that: The method further comprises: A planarization layer is formed to cover the black matrix and the first color filter pattern, the second color filter pattern and the third color filter pattern.

15. The method for preparing a display panel according to any one of claims 11 to 13, characterized in that: Before forming the organic insulating pattern, the method further includes: A touch control layer is formed on the packaging layer.

16. A display device, characterized in that: The invention comprises a display panel prepared by the display device according to any one of claims 1 to 10 or the method according to any one of claims 11 to 15.

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