Color resist film and display panel

Abstract

Provided in the present application are a color resist film and a display panel. The color resist film comprises a light-shielding layer and a color photoresist layer, wherein the light-shielding layer has a plurality of openings; and the color photoresist layer comprises a plurality of color filter units arranged corresponding to the plurality of openings. The color resist film further comprises refractive particles, wherein the refractive particles are arranged in at least one of red filter units, green filter units and blue filter units among the plurality of color filter units, and the refractive index of the refractive particles is less than the refractive index of the corresponding color filter units.

Description

Color film and display panel

[0001] This application claims priority to Chinese patent application No. 202311674808.3 filed on December 6, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display, and in particular to a color resist film and a display panel. Background Art

[0003] With the advancement of display technology, consumer electronics products that rely on display panels, such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, desktop computers, virtual reality (VR) display devices, and augmented reality (AR) display devices, have emerged in an endless stream. The rise of the "metaverse" concept has also attracted widespread consumer attention for VR / AR display devices, demonstrating their broad market application prospects.

[0004] VR / AR display devices are near-eye display devices, which have high requirements for the color gamut and overall thickness of the display panel. The color-resistance film, as an important filtering component in the display panel, has a significant impact on the color gamut and overall thickness of the display panel. However, in order to ensure the color gamut of the display panel, the thickness of the color-resistance film needs to be set to be relatively large, which makes it impossible to achieve lightweight and thinness, thereby making the overall thickness of the display panel larger. In addition, the increase in the thickness of the color-resistance film will also reduce the light transmittance of the display panel. Therefore, how to achieve lightweight and thinness while taking into account the color gamut requirements of the display panel, thereby improving the light transmittance, is an urgent problem that technicians in this field need to solve. Summary of the Invention

[0005] The present application provides a color-resistance film and a display panel, which can effectively solve the problem that the display panels in existing VR / AR display devices cannot take into account both color gamut and thinness, and have reduced light transmittance.

[0006] In a first aspect, the present application provides a color resist film, comprising: a light-shielding layer having a plurality of openings; a color resist layer comprising a plurality of color filter units, wherein the plurality of color filter units are arranged corresponding to the plurality of openings, and the plurality of color filter units include a plurality of red filter units, a plurality of green filter units, and a plurality of blue filter units; wherein the color resist film further comprises refractive particles, wherein the refractive particles are arranged in at least one of the red filter units, the green filter units, and the blue filter units, and the refractive index of the refractive particles is less than the refractive index of the corresponding color filter unit.

[0007] In a second aspect, the present application further provides a display panel, comprising a first substrate, a second substrate disposed opposite the first substrate, a liquid crystal layer disposed between the first and second substrates, and a backlight module disposed on a side of the first substrate facing away from the liquid crystal layer, wherein the first substrate and / or the second substrate comprises a color resist film; wherein the color resist film comprises:

[0008] a light-shielding layer, wherein the light-shielding layer has a plurality of openings;

[0009] The color photoresist layer includes a plurality of color filter units, wherein the plurality of color filter units are arranged corresponding to the plurality of openings, and the plurality of color filter units include a plurality of red filter units, a plurality of green filter units, and a plurality of blue filter units;

[0010] The color resist film further includes refractive particles, which are disposed in at least one of the red filter unit, the green filter unit, and the blue filter unit, and have a refractive index smaller than that of the corresponding color filter unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a first schematic plan view of a color resist film provided in some embodiments of the present application.

[0012] FIG2 a is a first cross-sectional schematic diagram taken along line AB in FIG1 of the embodiment of the present application.

[0013] FIG2 b is a second cross-sectional schematic diagram taken along line AB in FIG1 of the embodiment of the present application.

[0014] FIG2 c is a third cross-sectional schematic diagram taken along line AB in FIG1 of the embodiment of the present application.

[0015] FIG2 d is a fourth cross-sectional schematic diagram taken along line AB in FIG1 of the embodiment of the present application.

[0016] FIG2e is a fifth cross-sectional schematic diagram taken along line AB in FIG1 of the embodiment of the present application.

[0017] FIG2 f is a sixth cross-sectional schematic diagram along line AB in FIG1 of the embodiment of the present application.

[0018] FIG2g is a seventh cross-sectional schematic diagram taken along line AB in FIG1 of the embodiment of the present application.

[0019] FIG3 is a schematic cross-sectional view of a display panel provided in this application.

[0020] FIG4 is an eighth cross-sectional schematic diagram along line AB in FIG1 of the embodiment of the present application.

[0021] FIG5 is a second schematic plan view of a color resist film provided in some embodiments of the present application.

[0022] FIG6 is a schematic cross-sectional view taken along line AB in FIG5 of the embodiment of the present application. Modes for Carrying Out the Invention

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0024] In the description of this application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, and "at least one" means one, two, or more, unless otherwise specifically defined.

[0026] As shown in Figures 1 and 2a, in the first aspect, the present application provides a color resist film 10. The color resist film 10 used in the display panel can reduce the thickness of the color resist film 10 as much as possible while taking the color gamut into consideration, thereby achieving a thinner display panel.

[0027] In some embodiments of the present application, the color resist film 10 includes a light-shielding layer 11 and a color resist layer 12. The light-shielding layer 11 has a plurality of openings 111. The color resist layer 12 includes a plurality of color filter units 120. The plurality of color filter units 120 are arranged corresponding to the plurality of openings 111. The plurality of color filter units 120 include a plurality of red filter units 121, a plurality of green filter units 122, and a plurality of blue filter units 123. The color resist film 10 further includes refractive particles 13. The refractive particles 13 are arranged in at least one of the red filter units 121, the green filter units 122, and the blue filter units 123. The refractive index of the refractive particles 13 is less than the refractive index of the corresponding color filter unit 120.

[0028] In the color resist film 10 provided herein, at least one of the red filter unit 121, the green filter unit 122, and the blue filter unit 123 is provided with refractive particles 13, and the refractive index of the refractive particles 13 is lower than the refractive index of the corresponding color filter unit 120. Therefore, in a display panel application, when light emitted from a backlight module of the display panel and perpendicular to the color resist film 10 is incident on the color filter unit 120 provided with the refractive particles 13, the light impinging on the refractive particles 13 is angularly deflected due to the refractive index of the refractive particles 13 being lower than the refractive index of the color filter unit 120. As a result, the light continues to propagate in the color filter unit 120 in a direction not perpendicular to the color resist film 10, thereby extending the propagation path of the light in the color filter unit 120. This can further narrow the half-width (FWHM) of the corresponding color in the color filter unit 120, resulting in a purer color. This in turn improves the color gamut of the display panel when displaying the corresponding color, thereby enhancing the display quality of the display panel.

[0029] In addition, due to the provision of the refractive particles 13, the color resist film 10 can have a thinner thickness in the direction perpendicular to the color resist film 10, thereby extending the propagation path of the light in the color filter unit 120, thereby improving the color gamut of the display panel when displaying the corresponding color. Therefore, it can effectively improve the problem that the display panel including the color resist film 10 in the VR / AR display device cannot take into account both the color gamut and the lightness. In addition, due to the thinning of the color resist film 10, the light transmittance of the display panel can be further improved, thereby increasing the brightness of the display panel.

[0030] As shown in FIG2 a , in some embodiments of the present application, the red filter unit 121 , the green filter unit 122 , and the blue filter unit 123 are all provided with refractive particles 13 . That is, the red filter unit 121 is provided with refractive particles 13 , the green filter unit 122 is provided with refractive particles 13 , and the blue filter unit 123 is provided with refractive particles 13 . This allows the light emitted from the backlight module of the display panel and perpendicular to the color resist film 10 to enter the color filter units 120 of each color. The propagation paths of the light in the red filter unit 121 , the green filter unit 122 , and the blue filter unit 123 are all extended. This allows the half-value widths of the red filter unit 121 , the green filter unit 122 , and the blue filter unit 123 to be narrowed, making the red, green, and blue colors purer. This improves the color gamut of the display panel when displaying the red, green, and blue colors, thereby further improving the display quality of the display panel.

[0031] 2b-2g , in some embodiments of the present application, at least one color filter unit 120 is not provided with refractive particles 13. In this embodiment, the red filter unit 121, the green filter unit 122, and the blue filter unit 123 have different colors and are made of different materials. Therefore, when the color resist film 10 is applied to a display panel, the color gamut expression of the red filter unit 121, the green filter unit 122, and the blue filter unit 123 may differ.

[0032] For example, when the display panel needs to meet the color gamut standard a, the color gamut performance of the blue filter unit 123 in the display panel already meets the corresponding color gamut standard, but the color gamut performance of the red filter unit 121 and the green filter unit 122 in the display panel cannot meet the corresponding color gamut standard. In this case, the color resist film 10 can be configured to correspond to the structure shown in FIG. 2b , that is, the corresponding refractive particles 13 are only provided in the red filter unit 121 and the green filter unit 122.

[0033] For example, when the display panel needs to meet color gamut standard b, the color gamut performance of the green filter unit 122 in the display panel already meets the corresponding color gamut standard, but the color gamut performance of the red filter unit 121 and the blue filter unit 123 in the display panel cannot meet the corresponding color gamut standard. In this case, the color resist film 10 can be configured to correspond to the structure shown in FIG. 2 c , that is, the corresponding refractive particles 13 are only provided in the red filter unit 121 and the blue filter unit 123.

[0034] For example, when the display panel needs to meet the color gamut standard c, the color gamut performance of the red filter unit 121 in the display panel already meets the corresponding color gamut standard, but the color gamut performance of the green filter unit 122 and the blue filter unit 123 in the display panel cannot meet the corresponding color gamut standard. In this case, the color resist film 10 can be configured to correspond to the structure shown in FIG. 2d, that is, the corresponding refractive particles 13 are only provided in the green filter unit 122 and the blue filter unit 123.

[0035] For example, when the display panel needs to meet a color gamut standard of d, the color gamut performance of the green filter unit 122 and the blue filter unit 123 in the display panel already meets the corresponding color gamut standard, but the color gamut performance of the red filter unit 121 in the display panel does not meet the corresponding color gamut standard. In this case, the color resist film 10 can be configured to correspond to the structure shown in FIG. 2e , that is, the corresponding refractive particles 13 are only provided in the red filter unit 121.

[0036] For example, when the color gamut standard that the display panel needs to meet is e, the color gamut performance of the red filter unit 121 and the blue filter unit 123 in the display panel already meets their corresponding color gamut standards, but the color gamut performance of the green filter unit 122 in the display panel does not meet its corresponding color gamut standards. In this case, the color resist film 10 can be configured to correspond to the structure shown in FIG. 2f , that is, the corresponding refractive particles 13 are only provided in the green filter unit 122.

[0037] For example, when the color gamut standard that the display panel needs to meet is f, the color gamut performance of the red filter unit 121 and the green filter unit 122 in the display panel already meets the corresponding color gamut standard, but the color gamut performance of the blue filter unit 123 in the display panel does not meet the corresponding color gamut standard. In this case, the color resist film 10 can be configured to correspond to the structure shown in FIG. 2g , that is, the corresponding refractive particles 13 are only provided in the blue filter unit 123.

[0038] In some embodiments of the present application, the light shielding layer 11 has a certain thickness, and the opening 111 of the light shielding layer 11 extends through the light shielding layer 11 in a direction perpendicular to the light shielding layer 11. In display panel applications, the light shielding layer 11 is used to prevent color mixing between two adjacent color filter units 120 of different colors (such as adjacent red filter units 121 and adjacent green filter units 122, adjacent red filter units 121 and adjacent blue filter units 123, and adjacent blue filter units 123 and adjacent green filter units 122).

[0039] In some embodiments of the present application, in a direction perpendicular to the light-shielding layer 11, the thickness of the color photoresist layer 12 can be the same as the thickness of the light-shielding layer 11 and the depth of the opening 111, so as to avoid the problem of increased thickness of the color resist film 10 caused by the inconsistency between the thickness of the color photoresist layer 12 and the thickness of the light-shielding layer 11 and the depth of the opening 111, and to make the color resist film 10 as light and thin as possible.

[0040] 2a , in some embodiments of the present application, refractive particles 13 are disposed in the red filter unit 121 , the green filter unit 122 , and the blue filter unit 123 . The refractive particles 13 disposed in the red filter unit 121 , the refractive particles 13 disposed in the green filter unit 122 , and the refractive particles 13 disposed in the blue filter unit 123 are made of the same material, and their refractive indices are all less than 1.6.

[0041] In actual applications of display panels using the color resist film 10, researchers have found that when refractive particles 13 are provided in the red filter unit 121, the green filter unit 122, and the blue filter unit 123, providing refractive particles 13 made of the same material in the red filter unit 121, the green filter unit 122, and the blue filter unit 123 can significantly reduce the development cost of the color resist film 10. However, the refractive particles 13 of the same material have different abilities to narrow the half-peak width of color filter units 120 of different colors, which can easily lead to poor color gamut expression of display panels using the color resist film 10 when displaying certain colors. In the present application, the refractive particles 13 disposed in the red filter unit 121, the refractive particles 13 disposed in the green filter unit 122, and the refractive particles 13 disposed in the blue filter unit 123 are all made of a material with a refractive index less than 1.6. This allows the refractive particles 13 to be made of a uniform material and reduce costs. Furthermore, the differences in the half-value width narrowing capabilities of the refractive particles 13 of the same material for the color filter units 120 of different colors are minimized, thereby improving the overall color gamut expression of the display panel and further enhancing the display quality of the display panel.

[0042] In some embodiments of the present application, in a direction perpendicular to the light shielding layer 11 , the cross-sectional shape of the refractive particles 13 is circular.

[0043] In the color resist film 10 provided in the present application, since the cross-sectional shape of the refractive particles 13 is circular in the direction perpendicular to the light-shielding layer 11, the refractive particles 13 have a strong ability to deflect light, thereby enabling the deflection angle of the light incident on the color filter unit 120 to be larger, thereby increasing the field of view of the display panel using the color resist film 10, enabling the display panel to meet the wide-viewing angle display requirements of users of VR / AR display devices.

[0044] In some embodiments of the present application, the refractive particles 13 may have a hollow structure. The material of the refractive particles 13 may be an inorganic material, such as silicon dioxide, or an organic material, such as polystyrene, polymethyl methacrylate, etc.

[0045] In some embodiments of the present application, the maximum length of the cross section of the refractive particle 13 in any direction is less than 0.5 micrometers.

[0046] In some embodiments of the present application, when the refractive particles 13 are spherical, the maximum cross-sectional length of the refractive particles 13 in any direction is less than 0.5 microns, i.e., the diameter of the refractive particles 13 is less than 0.5 microns. When the refractive particles 13 are irregularly shaped, the maximum cross-sectional length of the refractive particles 13 in any direction is less than 0.5 microns, i.e., the maximum cross-sectional length of the refractive particles 13 in the direction of the maximum cross-sectional length is less than 0.5 microns. In the color resist film 10 provided in the present application, since the maximum cross-sectional length of the refractive particles 13 in any direction is less than 0.5 microns, the effect of the refractive particles 13 on the transmittance of the color filter unit 120 can be minimized, so that a display panel using the color resist film 10 can maintain maximum display brightness while taking into account the color gamut.

[0047] In some embodiments of the present application, the refractive particles 13 in the color filter unit 120 account for less than or equal to 5% of the volume of the corresponding color filter unit 120 .

[0048] In the color resist film 10 provided in the present application, in order to further reduce the impact of the refractive particles 13 on the transmittance of the color filter unit 120, the present application controls the volume proportion of the refractive particles 13 in the color filter unit 120 to less than 5% of the corresponding color filter unit 120 to ensure the maximum display brightness of the display panel.

[0049] In some embodiments of the present application, the refractive particles 13 in the color filter unit 120 account for a volume greater than or equal to 1% of the corresponding color filter unit 120 , so that a display panel using the color resist film 10 can ensure maximum display brightness while taking into account the color gamut.

[0050] In combination with Figures 1 and 4, the present application provides a color resist film 10. The structure of the color resist film 10 provided in Figure 4 is similar to the structure of the color resist film 10 provided in Figure 1 of the present application, and structural changes similar to those shown in Figures 2b to 2g can also be made. The same parts will not be repeated in this embodiment.

[0051] In some embodiments of the present application, in a direction perpendicular to the light shielding layer 11 , the cross-sectional shape of the refractive particles 13 is an ellipse, and the major axis of the ellipse is parallel to the direction perpendicular to the light shielding layer 11 .

[0052] As previously mentioned, because the cross-sectional shape of the refractive particles 13 is circular in the direction perpendicular to the light-shielding layer 11, the refractive particles 13 have a strong ability to deflect light, thereby enabling the light incident on the color filter unit 120 to be deflected at a larger angle, thereby increasing the viewing angle of the display panel using the color-resist film 10. This makes it impossible for the display panel using the color-resist film 10 to effectively meet the user's demand for a display panel with a small viewing angle. To improve this problem, in this embodiment, the cross-sectional shape of the refractive particles 13 in the direction perpendicular to the light-shielding layer 11 is an ellipse, and the major axis of the ellipse is parallel to the direction perpendicular to the light-shielding layer 11, thereby reducing the ability of the refractive particles 13 to deflect light incident on the color filter unit 120.

[0053] In some embodiments of the present application, the curvature of the ellipse is greater than the radius corresponding to the curvature and less than the ratio of the square of half the minor axis of the ellipse to half the major axis of the ellipse.

[0054] In some embodiments of the present application, the curvature of the ellipse is greater than the ratio of the square of half the minor axis of the ellipse to half the major axis of the ellipse, and less than the curvature of a circle with half the minor axis as the radius.

[0055] In this embodiment, the curvature of the ellipse is greater than the ratio of the square of half the minor axis of the ellipse to half the major axis of the ellipse, and less than the curvature of a circle with half the minor axis as the radius. This allows the refractive particles 13 to control the deflection angle of light incident on the color filter unit 120 within a reasonable range, further improving the display effect of a display panel using the color resist film 10 at a small viewing angle.

[0056] In some embodiments of the present application, the material of the refractive particles 13 includes polysiloxane.

[0057] Researchers further discovered that controlling the cross-sectional shape of each refractive particle 13 to be elliptical in a direction perpendicular to the light-shielding layer 11 is quite difficult, placing high demands on the material properties and production costs of the refractive particles 13. Therefore, the present application utilizes polysiloxane as the material for the refractive particles 13. This allows the cross-sectional shape of the polysiloxane in the refractive particles 13 to be adjusted by adjusting the reactant concentration and temperature during the hydrolysis-polycondensation preparation process. This allows the refractive particles 13 to have an elliptical cross-sectional shape in a direction perpendicular to the light-shielding layer 11.

[0058] In combination with Figures 5 and 6, the present application provides a color resist film 10. The structure of the color resist film 10 provided in Figure 5 of the present application is the same as or similar to the structure of the color resist film 10 provided in Figure 1 of the present application, and structural changes similar to those shown in Figures 2b to 2g can also be made. The same parts will not be repeated in this embodiment.

[0059] In some embodiments of the present application, the color resist film 10 further includes a reflective layer 14 . The reflective layer 14 includes a plurality of reflective units 141 . The reflective units 141 are disposed on sidewalls of the opening 111 and surround the color filter unit 120 .

[0060] In the color resist film 10 provided in the present application, the cross-sectional shape of the refractive particles 13 in the color filter unit 120 is circular in the direction perpendicular to the light shielding layer 11. As mentioned above, since the cross-sectional shape of the refractive particles 13 is circular in the direction perpendicular to the light shielding layer 11, the refractive particles 13 have a strong ability to deflect light, thereby enabling the deflection angle of the light incident on the color filter unit 120 to be larger, thereby making the field of view of the display panel using the color resist film 10 larger. However, researchers further discovered that since the refractive particles 13 have a strong ability to deflect light, the refractive particles 13 easily refract the light incident on the color filter unit 120 into the light shielding layer 11, causing part of the light to be absorbed by the light shielding layer 11, resulting in a loss of light efficiency, thereby reducing the maximum display brightness of the display panel using the color resist film 10 and increasing display power consumption. The present application provides a reflective unit 141 surrounding the color filter unit 120 on the side wall of the opening 111 of the light-shielding layer 11, thereby preventing light deflected at a large angle from being absorbed by the light-shielding layer 11, and part of the light reflected by the reflective unit 141 can be irradiated onto the refractive particles 13, thereby further extending the propagation path of the light, and further making the half-peak width of the color filter unit 120 of the corresponding color narrower and the color purer, further improving the color gamut of the display panel when displaying the corresponding color, and improving the display quality of the display panel.

[0061] It should be noted that the present application does not impose any restrictions on the cross-sectional shape of the refractive particles 13 in the color filter unit 120 in the direction perpendicular to the light-shielding layer 11. When the cross-sectional shape of the refractive particles 13 in the color filter unit 120 in the direction perpendicular to the light-shielding layer 11 is a shape other than a circle (such as an ellipse), the color resist film 10 including the reflective unit 141, when applied to a display panel, can still improve the color gamut of the display panel when displaying the corresponding color, thereby improving the display quality of the display panel.

[0062] The present application also provides a display panel, as shown in Figure 3, the display panel 20 includes: a first substrate 21; a second substrate 22, arranged opposite to the first substrate 21; a liquid crystal layer 23, arranged between the first substrate 21 and the second substrate 22; a backlight module 24, arranged on the side of the first substrate 21 away from the liquid crystal layer 23; wherein the first substrate 21 and / or the second substrate 22 includes a color resist film 10, and the structure of the color resist film 10 is the same as the structure of the color resist film 10 in the above-mentioned embodiments of the present application.

[0063] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0064] The above is a detailed introduction to the technical solutions provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A color resist film, comprising: A light shielding layer, wherein the light shielding layer has a plurality of openings; The color photoresist layer includes a plurality of color filter units, the plurality of color filter units are arranged corresponding to the plurality of openings, and the plurality of color filter units include a plurality of red filter units, a plurality of green filter units and a plurality of blue filter units; Wherein, the color-resist film further includes refractive particles, the refractive particles are arranged in at least one of the red filter unit, the green filter unit, and the blue filter unit, and the refractive index of the refractive particles is smaller than the refractive index of the corresponding color filter unit.

2. The color resist film according to claim 1, wherein: The red filter unit, the green filter unit and the blue filter unit are all provided with refractive particles.

3. The color resist film according to claim 2, wherein: The refractive particles arranged in the red filter unit, the refractive particles arranged in the green filter unit, and the refractive particles arranged in the blue filter unit are made of the same material, and their refractive indices are all less than 1.

6.

4. The color resist film according to claim 1, wherein: In a direction perpendicular to the light shielding layer, the cross-sectional shape of the refractive particles is circular.

5. The color resist film according to claim 1, wherein: In a direction perpendicular to the light shielding layer, the cross-sectional shape of the refractive particles is an ellipse, and the major axis of the ellipse is parallel to the direction perpendicular to the light shielding layer.

6. The color resist film according to claim 5, wherein: The curvature of the ellipse is greater than a ratio of a square of half of the minor axis of the ellipse to half of the major axis of the ellipse, and less than a curvature of a circle with half of the minor axis as a radius.

7. The color resist film according to claim 5, wherein: The curvature of the ellipse is greater than a radius corresponding to the curvature and less than a ratio of a square of half of a minor axis of the ellipse to half of a major axis of the ellipse.

8. The color resist film according to claim 5, wherein: The material of the refractive particles includes polysiloxane.

9. The color resist film according to any one of claims 4 to 8, wherein: The maximum length of the cross section of the refractive particles in any direction is less than 0.5 micrometers.

10. The color resist film according to claim 9, wherein: The refractive particles in the color filter unit account for less than or equal to 5% of the volume of the corresponding color filter unit.

11. The color resist film according to claim 1, wherein: The color resist film further includes a reflective layer, and the reflective layer includes a plurality of reflective units. The reflective units are arranged on the side walls of the opening and surround the color filter unit.

12. The color resist film according to claim 1, wherein: The thickness of the color photoresist layer may be the same as the thickness of the light shielding layer and the depth of the opening.

13. The color resist film according to claim 1, wherein: The material of the refractive particles includes inorganic material or organic material.

14. A display panel, wherein: The display panel includes a first substrate, a second substrate arranged opposite to the first substrate, a liquid crystal layer arranged between the first substrate and the second substrate, and a backlight module arranged on a side of the first substrate away from the liquid crystal layer, and the first substrate and / or the second substrate includes a color resist film; wherein the color resist film includes: A light shielding layer, wherein the light shielding layer has a plurality of openings; The color photoresist layer includes a plurality of color filter units, the plurality of color filter units are arranged corresponding to the plurality of openings, and the plurality of color filter units include a plurality of red filter units, a plurality of green filter units and a plurality of blue filter units; Wherein, the color-resist film further includes refractive particles, the refractive particles are arranged in at least one of the red filter unit, the green filter unit, and the blue filter unit, and the refractive index of the refractive particles is smaller than the refractive index of the corresponding color filter unit.

15. The display panel according to claim 14, wherein: The red filter unit, the green filter unit, and the blue filter unit are all provided with refractive particles, and the refractive particles provided in the red filter unit, the refractive particles provided in the green filter unit, and the refractive particles provided in the blue filter unit are made of the same material, and their refractive indices are all less than 1.

6.

16. The display panel according to claim 14, wherein: In a direction perpendicular to the light shielding layer, the cross-sectional shape of the refractive particles is circular.

17. The display panel according to claim 14, wherein: In a direction perpendicular to the light shielding layer, the cross-sectional shape of the refractive particles is an ellipse, and the major axis of the ellipse is parallel to the direction perpendicular to the light shielding layer.

18. The display panel according to claim 17, wherein: The curvature of the ellipse is greater than a ratio of a square of half of the minor axis of the ellipse to half of the major axis of the ellipse, and less than a curvature of a circle with half of the minor axis as a radius.

19. The display panel according to claim 17, wherein: The curvature of the ellipse is greater than a radius corresponding to the curvature and less than a ratio of a square of half of a minor axis of the ellipse to half of a major axis of the ellipse.

20. The display panel according to any one of claims 16 to 19, wherein: The maximum length of the cross section of the refractive particles in any direction is less than 0.5 micrometers.

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