Display panel, display device and manufacturing method

Abstract

The present disclosure relates to the technical field of display panels, and specifically provides a display panel, a display device and a preparation method, aiming to solve the problem that the black matrix is prone to defects in the existing preparation method. To this end, the display panel provided by the present disclosure comprises an organic insulating pattern, a first color color film pattern and a black matrix on an encapsulation layer, the organic insulating pattern has a first opening, the first color color film pattern comprises a first color film pattern part in the first opening area and a second color film pattern part on the organic insulating pattern, and the black matrix is on the second color film pattern part. The material layer forming the black matrix is arranged on the material layer forming the first color color film pattern, and the material layer forming the first color color film pattern can be arranged relatively flat, so that the thickness of the material layer forming the black matrix is also relatively uniform everywhere, and the thickness consistency of the black matrix formed after development is good and is not prone to residual.

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 preparation method. BACKGROUND

[0002] In some structures of display panels, an organic insulating pattern and a black matrix are arranged below a color film layer. Due to process defects, the developing degree in the formation of the black matrix is difficult to control, and over-development often occurs, leading to peeling of the edge of the light shielding layer and light transmission, or under-development occurs, leading to a large range of the light shielding layer. SUMMARY

[0003] The present disclosure aims to solve the problems in the prior art and provide a display panel, a display device and a preparation method.

[0004] In a first aspect, the present disclosure provides a display panel, comprising: a substrate; a light emitting unit layer 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 on the light emitting unit layer; 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 a projection of the organic insulating pattern on the substrate at least partially overlaps with a 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 color film pattern, comprising a first color film pattern portion in the first opening region and a second color film pattern portion on the organic insulating pattern; a black matrix on the second color film pattern portion; a second color color film pattern, comprising at least a third color film pattern portion in the second opening region; a third color color film pattern, comprising at least a fourth color film pattern portion in the third opening region; and a refractive index of the organic insulating pattern is less than a 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, a distance between an edge of a projection of the organic insulating pattern on the substrate and an edge of a projection of the pixel defining layer on the substrate is -2 μm to 4 μm; and / or, a distance between an edge of a projection of the second color film pattern portion on the substrate and an edge of a projection of the pixel defining layer on the substrate is 0 μm to 6 μm; and / or, a distance between an edge of a projection of the black matrix on the substrate and an edge of a projection of the pixel defining layer on the substrate is 3 μm to 6 μm.

[0006] In some exemplary embodiments, a width of the second color film 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 over the black matrix surrounding the second opening area; and / or, the third color filter pattern further includes a sixth color filter pattern portion extending over the black matrix surrounding the third opening area.

[0008] In some exemplary embodiments, the 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 are in contact with at least a portion of the sidewalls 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 all different, and each is one of red, green, and blue.

[0012] In some exemplary embodiments, the display panel further includes a touch layer located between the organic insulating 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, this disclosure provides a method for fabricating a display panel, comprising: 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 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 region, the second opening region, and the third opening region are respectively adjacent to the first color light-emitting element. The components, a second color light-emitting element, and a third color light-emitting element correspond to each other; a first color filter layer is formed; a light-shielding layer is formed on the first color filter layer; the light-shielding layer and the first color filter layer are patterned, retaining only the first color filter layer in the first opening area, the first color filter layer on the organic insulating pattern, and the light-shielding layer, wherein the retained first color filter layer constitutes the first color filter pattern, and the retained light-shielding layer constitutes the black matrix; a second color filter pattern and a third color filter pattern are formed, wherein the second color filter pattern includes at least a portion located in the second opening area, and the third color filter pattern includes at least a portion located in the third opening area.

[0015] In some exemplary embodiments, the patterning of the light-shielding layer and the first color filter layer, retaining only the first color filter layer in the first opening area, the first color filter layer on the organic insulating pattern, and the light-shielding layer, includes: modifying the first color filter layer and the light-shielding layer in the second and third opening areas and modifying the light-shielding layer in the first opening area through a halftone mask; and removing the modified light-shielding layer and the first color filter layer by 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 over the black matrix surrounding the second opening region; and / or forming the third color filter pattern to extend over the black matrix surrounding the third opening region.

[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, the method further includes forming a touch layer on the encapsulation layer before forming the organic insulating pattern.

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

[0020] Compared with the prior art, this disclosure has the following beneficial effects:

[0021] The display panel provided in this disclosure includes: a substrate; a light-emitting unit layer 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 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 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 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, including a first color filter pattern portion located in the first opening region and a second color filter pattern portion located on the organic insulating pattern; a black matrix located on the second color filter pattern portion; a second color filter pattern, including at least a third color filter pattern portion located in the second opening region; a third color filter pattern, including at least a fourth color filter pattern portion located in the third opening region; and the refractive index of the organic insulating pattern is less than the refractive index of any one of the first color filter pattern, the second color filter pattern, and the third color filter pattern. The black matrix is ​​located on the first color film pattern. The material layer forming the black matrix is ​​set on the material layer forming the first color film pattern. The material layer forming the first color film pattern can be set relatively flat, so that the thickness of the material layer forming the black matrix is ​​relatively uniform in all places. During the process of forming the black matrix using the patterning process, the exposure degree of the material layer in all places is also roughly the same. Therefore, the thickness of the black matrix formed after development is relatively consistent and not easy to leave residue. Attached Figure Description

[0022] The preferred embodiments of this disclosure are described below with reference to the accompanying drawings, in which:

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

[0024] FIG. 1B - FIG. 1C It is a cross-sectional view of a display panel during its manufacturing process;

[0025] FIG. 2 This is a cross-sectional view of a display panel provided in at least one embodiment of the present disclosure;

[0026] FIG. 3 This is a cross-sectional view of another display panel provided in at least one embodiment of the present disclosure;

[0027] FIG. 4 This is a cross-sectional view of another display panel provided in at least one embodiment of the present disclosure;

[0028] FIG. 5This is a cross-sectional view of another display panel provided in at least one embodiment of the present disclosure;

[0029] FIG. 6A - FIG. 6C This is a cross-sectional view of a display panel during its manufacturing process, provided in at least one embodiment of this disclosure.

[0030] Explanation of reference numerals in the attached figures:

[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 insulating pattern; 41. First opening area; 42. Second opening area; 43. Third opening area; 5. First color filter pattern; 50. First color filter layer; 51. First color filter pattern section; 52. Second color filter pattern section; 6. Black matrix; 60. Light-shielding layer; 7. Second color filter pattern; 71. Third color filter pattern section; 72. Fifth color filter pattern section; 8. Third color filter pattern; 81. Fourth color filter pattern section; 82. Sixth color filter pattern section; 9. Planarization layer; 10. Touch layer; 101. First metal layer; 102. Second metal layer; 103. Touch insulating layer. Detailed Implementation

[0032] Preferred embodiments of the present disclosure will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present disclosure and are not intended to limit the scope of protection of the present disclosure.

[0033] It should be noted that in the description of this disclosure, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Furthermore, it should be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0035] like FIG. 1AAs shown, the display panel includes an array substrate, a light-emitting unit layer 2, and an encapsulation layer 3 arranged sequentially. 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. 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. The orthographic projection of the black matrix 6 onto the substrate 1 falls within the orthographic projection range of the organic insulating pattern 4 onto the substrate 1. The organic insulating pattern 4 surrounds and forms a first opening region 41, a second opening region 42, and a third opening region 43. The first opening region 41, the second opening region 42, and the third opening region 43 are filled with a first color filter pattern 5, a second color filter pattern 6, and a third color filter pattern 7, respectively. The refractive index of the color filter patterns (first color filter pattern 5, second color filter pattern 6, and third color filter pattern 7) is greater than the refractive index of the organic insulating pattern 4. Light emitted from the light-emitting unit layer 2 is reflected by total internal reflection after passing through the color filter patterns and hitting the sidewalls of the organic insulating pattern 4, thus improving the light extraction efficiency.

[0037] Among them, such as FIG. 1B and FIG. 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 the side of the encapsulation layer 3 away from the substrate 1 using a patterning process. The organic insulating pattern 4 surrounds and forms 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 using a patterning process. Specifically, a light-shielding layer 60 is first formed, which covers the organic insulating pattern 4 and the first opening area 41, the second opening area 42, and the third opening area 43. The light-shielding layer 60 is then exposed through a mask, and subsequently developed, retaining a portion of the light-shielding layer 60 located on the organic insulating pattern 4 to form the black matrix 6.

[0040] The light-shielding layer 60 located on the sidewall of the organic insulating pattern 4 is difficult to remove completely. If the development time is extended to remove the light-shielding layer 60 located on the sidewall 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 sidewall of the organic insulating pattern 4, affecting the total internal reflection of light at the sidewall 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 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 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 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 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, including a first color filter pattern portion located in the first opening region and a second color filter pattern portion located on the organic insulating pattern; a black matrix located on the second color filter pattern portion; a second color filter pattern, including at least a third color filter pattern portion located in the second opening region; a third color filter pattern, including at least a fourth color filter pattern portion located in the third opening region; and the refractive index of the organic insulating pattern is less than the refractive index of any one of the first color filter pattern, the second color filter pattern, and the third color filter pattern.

[0042] The following describes some embodiments of the display panel of this disclosure through several specific examples.

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

[0044] like FIG. 2 As shown, the display panel includes a substrate 1 and an array substrate (not shown), a light-emitting unit layer 2, and an encapsulation layer 3 sequentially disposed on the substrate 1. The light-emitting unit layer 2 includes a pixel defining layer 21, which 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 (e.g., all white light) or different.

[0045] An organic insulating pattern 4 is formed on the encapsulation layer 3. The organic insulating pattern 4 surrounds and forms a first opening region 41, a second opening region 42, and a third opening region 43, which are exposed on the encapsulation layer 3. 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, the cross-sectional shape of the organic insulating pattern 4 is an upright trapezoid, and the slope angle of the sidewalls 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 -2μm to 4μm. Specifically, 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 negative, 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 positive, 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 encapsulating adhesive has 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 all different, namely red, green, and blue.

[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 4 μm. For example, the distance 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 0 μm to 6 μm.

[0049] The black matrix 6 is located above the second color filter pattern portion 52, and the orthographic projection of the black matrix 6 onto the substrate 1 falls within the orthographic projection range of the second color filter pattern portion 52 onto the substrate 1. For example, the distance d3 between the edge of the orthographic projection of the black matrix 6 onto the substrate 1 and the edge of the orthographic projection of the pixel defining layer 21 onto 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 region 42, and the third color filter pattern 8 includes at least a fourth color filter pattern portion 81 located in the third opening region 43. Both the third color filter pattern portion 71 and the fourth color filter pattern portion 81 are capable of contacting 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 to ensure that both the third color filter pattern portion 71 and the fourth color filter pattern portion 81 are capable of contacting 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 that of any one of the first color filter pattern 5, the second color filter pattern 7, and the third color filter pattern 8. Light emitted from the light-emitting unit layer 2 (such as the first, second, and third light-emitting units) is incident on the sidewalls of the organic insulating pattern 4 via the color filter pattern (such as the first, second, and third color filter pattern 8), resulting in total internal reflection and reflecting the light to the central region, thereby increasing the light extraction efficiency. For example, the refractive index of the organic insulating pattern 4 is 1.3 to 1.5, and the refractive index of the color filter pattern is 1.6 to 2.0.

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

[0053] In some examples, such as FIG. 3 As shown, the second color filter pattern 7 further includes a fifth color filter pattern portion 72 extending above the black matrix 6 surrounding the second opening region 42, and the third color filter pattern 8 further includes a sixth color filter pattern portion 82 extending above the black matrix 6 surrounding the third opening region 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 provided on the color film pattern, which covers the first color film pattern 5, the second color film pattern 7, the third color film pattern 8, and the black matrix 6.

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

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

[0057] For example, such as FIG. 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 as 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.

[0058] FIG. 5 This is a cross-sectional view of another display panel provided in at least one embodiment of the present disclosure.

[0059] For example, such as FIG. 5 As shown, the touch layer 10 includes a first metal layer 101 and a second metal layer 102, and a touch 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 as a first touch electrode and a second touch electrode. The first touch electrode is connected in series in one direction, and two adjacent second touch electrodes are electrically connected through the second metal layer 102 in another direction.

[0061] In the second example, the touch layer 10 is a self-capacitive touch structure, and the second metal layer 102 is formed as a first touch electrode and a second touch electrode. The first touch electrode is 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 capacitance touch structure, the first metal layer 101 is formed as the first touch electrode, and the second metal layer 102 is formed as the second touch electrode.

[0063] This disclosure also provides a method for fabricating a display panel, comprising: 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 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 region, the second opening region, and the third opening region are respectively adjacent to the first color light-emitting element, the second color light-emitting element, and the third color light-emitting element defined by a pixel defining layer. The two-color light-emitting elements and the third-color light-emitting element correspond to each other; a first-color color filter layer is formed; a light-shielding layer is formed on the first-color color filter layer; the light-shielding 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 on the organic insulating pattern, and the light-shielding layer are retained, wherein the retained first-color color filter layer constitutes the first-color color filter pattern, and the retained light-shielding layer constitutes the black matrix; a second-color color filter pattern and a third-color color filter pattern are formed, wherein the second-color color filter pattern includes at least the portion located in the second opening area, and the third-color color filter pattern includes at least the portion located in the third opening area.

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

[0065] FIG. 6A - FIG. 6C yes FIG. 2 The image shown is a cross-sectional view of the display panel during its fabrication process.

[0066] This disclosure provides a method for manufacturing a first type of display panel, including:

[0067] like FIG. 6A As shown, a substrate 1 is provided, on which an array substrate (not shown), a light-emitting unit layer 2, and an encapsulation layer 3 are sequentially formed. The light-emitting unit layer 2 includes a pixel defining layer 21, which 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 (e.g., all white light) or different.

[0068] For example, when the display panel is a flexible display panel, the substrate 1 provided can be a flexible substrate such as polyimide (PI), and when the display panel is a rigid display panel, the substrate 1 can 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 using 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 single patterning process includes photoresist formation, 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 region 41 and at least a portion of the organic insulating pattern 4, wherein the portion of the first color filter pattern 5 not covering the first opening region 41 surrounds the second opening region 42 and the third opening region 43. For example, the black matrix 6 surrounds the first opening region 41, the second opening region 42, and the third opening region 43, and the orthographic projection of the black matrix 6 onto the substrate 1 falls within the orthographic projection range of the first color filter pattern 5 onto the substrate 1.

[0071] The process of sequentially forming a first color filter pattern 5 and a 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; 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, retaining only the first color filter layer 50 in the first opening area 41, the first color filter layer 50 on the organic insulating pattern 4, and the light-shielding layer 60, 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 set relatively flat, the thickness of the light-shielding layer 60 is relatively uniform in all places. During the process of forming the black matrix 6 using the patterning process, the exposure degree of the light-shielding layer 60 in all places is also roughly the same. Therefore, the black matrix 6 formed after the light-shielding layer 60 is developed has good thickness consistency and is not easy to leave residue.

[0072] For example, such as FIG. 6B and FIG. 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 using a patterning 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. The remaining light-shielding layer 60 forms a black matrix 6. The first color filter layer 50 is patterned using a patterning process, and the first color filter layer 50 located in the second opening area 42 and the second opening area 42 is removed. The remaining first color filter layer 50 is located inside the first opening area 41 and below the black matrix 6, forming a first color filter pattern 5.

[0073] For example, combining FIG. 6C As shown, a halftone mask is formed on the light-shielding layer 60. The halftone 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. Exposure is performed using the halftone mask, which denatures the first color filter layer 50 covering the second opening area 42 and the third opening area 43, and also denatures the light-shielding layer 60 covering the first opening area 41. Most of the first color filter layer 50 covering the first opening area 41 remains unchanged. The denatured light-shielding layer 60 and the first color filter layer 50 are removed by development. The remaining first color filter layer 50 after development forms the first color filter pattern 5, and the remaining light-shielding layer 60 forms the black matrix 6. In this way, the first color filter pattern 5 and the black matrix 6 can be formed simultaneously in only one patterning process, thereby simplifying the process flow.

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

[0075] like FIG. 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 includes at least a portion located in the second opening region 42, and the third color filter pattern 8 includes at least a portion located in the third opening region 43.

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

[0077] For example, such as FIG. 3 As shown, the second color film pattern 7 extends above the black matrix 6 surrounding the second opening area 42, and the third color film pattern 8 extends above the black matrix 6 surrounding the third opening area 43.

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

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

[0080] For example, such as FIG. 4As shown, the touch layer 10 is a single-layer metal film. For example, this single-layer metal film is formed as 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, such as FIG. 5 FIG. 6 As shown, the touch layer 10 includes a first metal layer 101 and a second metal layer 102, and a touch insulating layer 103 is disposed between the first metal layer 101 and the second metal layer 102.

[0082] In summary, the method for manufacturing the display panel provided in this 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 on the organic insulating pattern 4, and the light-shielding layer 60 are retained. 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 set relatively flat, the thickness of the light-shielding layer 60 is relatively uniform in all places. During the process of forming the black matrix 6 using the patterning process, the exposure degree of the light-shielding layer 60 in all places is also roughly the same. Therefore, the thickness of the black matrix 6 formed after the light-shielding layer 60 is developed is relatively uniform and not easy to leave residue.

[0084] (2) A halftone mask is formed on the light-shielding layer 60. The halftone 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. Exposure is performed using the halftone mask to denature the first color film 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. Most of the first color film layer 50 covering the first opening area 41 remains unchanged. The denatured light-shielding layer 60 and the first color film layer 50 are removed by development. The first color film layer 50 retained after development constitutes the first color film pattern 5, and the retained light-shielding layer 60 constitutes the black matrix 6. In this way, the first color film 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 this disclosure also provides a display device, including the display panel described above. The display device can be any product or component with display functionality, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, or vehicle display screen; the embodiments of this disclosure do not limit this.

[0086] The following points also need to be explained:

[0087] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0088] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0089] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0090] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, include: Substrate; The 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; The 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 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 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. The first color film pattern includes 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; The black matrix is ​​located on the pattern portion of the second color filter; The second color film pattern includes at least a third color film pattern portion located in the second opening area; The third color film pattern includes at least a fourth color film pattern portion located in the third opening area; The refractive index of the organic insulating pattern is less than that 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 defining 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 on the substrate and the orthographic projection edge of the pixel defining layer on the substrate is 0 μm to 6 μm; and / or, The distance between the orthogonal projection edge of the black matrix on the substrate and the orthogonal projection edge of the pixel defining 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 is greater than 4μm.

4. The display panel according to claim 1, characterized in that, The second color film pattern also includes a fifth color film pattern portion extending above the black matrix surrounding the second opening area; and / or, The third color film pattern also includes a sixth color film 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 6μm.

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 curved surface; and / or, The second color film pattern and / or the third color film pattern are in contact with at least a portion of the sidewalls of the black matrix.

8. The display panel according to claim 1, characterized in that, The colors of the first color film pattern, the second color film pattern, and the third color film pattern are all different, and each is one of red, green, and blue.

9. The display panel according to claim 1, characterized in that, The display panel also 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 also includes: A 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 manufacturing a display panel, characterized in that, include: A light-emitting unit layer is formed 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; An encapsulation layer is formed on the light-emitting unit layer; An organic insulating pattern and a first opening region, a second opening region, and a third opening region surrounded by the organic insulating pattern are formed 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 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 the first color filter layer; A light-shielding layer is formed on the first color filter layer; The light-shielding layer and the first color film layer are patterned, and only the first color film layer in the first opening area, the first color film layer on the organic insulating pattern, and the light-shielding layer are retained, wherein the retained first color film layer constitutes the first color film pattern, and the retained light-shielding layer constitutes the black matrix. A second color filter pattern and a third color filter pattern are formed, wherein the second color filter pattern includes at least a portion located in the second opening area, and the third color filter pattern includes at least a portion located in the third opening area.

12. The method for manufacturing a display panel according to claim 11, characterized in that, The patterning of the light-shielding layer and the first color filter layer, retaining only the first color filter layer in the first opening area, the first color filter layer on the organic insulating pattern, and the light-shielding layer, includes: The first color filter layer and the light-blocking layer in the second and third opening areas are modified by using a halftone mask, and the light-blocking layer in the first opening area is also modified. The denatured light-blocking layer and the first color film layer are removed by developing.

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

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

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

16. A display device, characterized in that, Includes a display panel prepared by any one of the display devices as claimed in claims 1-10 or by any one of the methods as claimed in claims 11 to 15.

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