Color film substrate, display panel, display device and preparation method

Abstract

The invention discloses a color film substrate, a display panel, a display device and a preparation method, relates to the technical field of display, and can solve the problem of low transmittance under pure white brightness of a TFT-LCD (Thin Film Transistor Liquid Crystal Display). The color film substrate comprises a substrate body. The light filtering layer is arranged on one side of the substrate, the light filtering layer comprises a shading structure, an optical structure and a multi-color light filtering film, the optical structure is arranged on the side, away from the substrate, of the shading structure, and the orthographic projection of the shading structure on the substrate and the orthographic projection of the optical structure on the substrate are at least partially overlapped; the filter film is arranged between the adjacent shading structures; the covering layer is arranged on one side, far away from the substrate, of the filter layer; the refractive index of the optical structure is smaller than that of the covering layer.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a color film substrate, a display panel, a display module, a display device, and a method for preparing a color film substrate. Background Art

[0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD) has the characteristics of small size, low power consumption, high image quality, no radiation and easy to carry, and has been rapidly developed in recent years. The contrast of TFT-LCD is the ratio of the transmittance under pure white brightness to the transmittance under pure black brightness. In the related art, the transmittance of TFT-LCD under pure white brightness is relatively low. Summary of the invention

[0003] The embodiments of the present application provide a color film substrate, a display panel, a display device and a preparation method, which can solve the problem of low transmittance under pure white brightness of TFT-LCD.

[0004] According to a first aspect of an embodiment of the present application, a color filter substrate is provided, comprising:

[0005] substrate substrate;

[0006] A filter layer, the filter layer is arranged on one side of the base substrate, the filter layer comprises a light shielding structure, an optical structure and filter films of multiple colors, the optical structure is arranged on a side of the light shielding structure away from the base substrate, the orthographic projection of the light shielding structure on the base substrate at least partially overlaps with the orthographic projection of the optical structure on the base substrate, and the filter film is arranged between adjacent light shielding structures;

[0007] A covering layer, the covering layer being arranged on a side of the filter layer away from the base substrate;

[0008] Wherein, the refractive index of the optical structure is smaller than the refractive index of the covering layer.

[0009] In some embodiments, the color filter substrate further includes:

[0010] A support column, the support column is located on a side of the cover layer away from the filter layer;

[0011] The material of the optical structure is the same as the material of the support column; or,

[0012] The material of the optical structure is different from the material of the supporting pillar.

[0013] In some embodiments, the orthographic projection of the optical structure on the substrate is a first projection, and the maximum dimension of the first projection in the first direction is a first dimension;

[0014] The orthographic projection of the light shielding structure on the first substrate is a second projection, and the maximum size of the second projection in the first direction is a second size;

[0015] The orthographic projection of the filter film on the first substrate is a third projection, and the maximum dimension of the third projection in the first direction is a third dimension;

[0016] The first direction is the direction of the plane where the line connecting two adjacent filter films is located;

[0017] The first size is equal to or smaller than the second size; and / or,

[0018] The angle between the side surface of the optical structure along the second direction and the plane where the substrate is located is in a range of 60° to 90°, and the second direction is a direction perpendicular to the plane where the substrate is located.

[0019] In some embodiments, the orthographic projection of the optical structure away from one end of the substrate is a fourth projection, and the size of the fourth projection in the first direction is a fourth size;

[0020] The orthographic projection of the optical structure close to one end of the substrate is a fifth projection, and the size of the fifth projection in the first direction is a fifth size;

[0021] The contact surface between the optical structure and the filter film includes a plane, and the fourth size is smaller than the fifth size; and / or,

[0022] The contact surface between the optical structure and the filter film includes a curved surface, and the fourth dimension is greater than the fifth dimension.

[0023] In some embodiments, the orthographic projection of the optical structure away from the end of the substrate is the fourth projection;

[0024] The orthographic projection of one end of the filter film close to the base substrate is the sixth projection;

[0025] The contact surface between the optical structure and the filter film includes a curved surface, and the fourth projection overlaps with the sixth projection.

[0026] In some embodiments, the sum of the thickness of the optical structure in the second direction and the thickness of the light shielding structure in the second direction is the first thickness, wherein the second direction is a direction perpendicular to the plane where the substrate is located;

[0027] The thickness of the filter film is a second thickness;

[0028] The first thickness is the same as the second thickness, and a surface of the optical structure away from the substrate is flush with a surface of the filter film away from the substrate; and / or,

[0029] The thickness of the optical structure in the second direction is the same as the thickness of the light shielding structure in the second direction.

[0030] In some embodiments, the optical structure and the light shielding structure are prepared using the same mask.

[0031] According to a second aspect of an embodiment of the present application, a display panel is provided, comprising:

[0032] The color filter substrate according to the first aspect, and an array substrate arranged opposite to the color filter substrate;

[0033] The liquid crystal layer is arranged between the array substrate and the color filter substrate.

[0034] According to a third aspect of the embodiments of the present application, a display device is provided, including:

[0035] The display panel as described in the second aspect, and the backlight module located on the light incident side of the display panel.

[0036] In some embodiments, when the wavelength of the output light of the backlight module is 633 nm, the refractive index of the cover layer is in the range of 1.54 to 1.55, and the refractive index of the optical structure is less than 1.5.

[0037] A fourth aspect of the embodiments of the present application provides a method for preparing a color filter substrate, comprising:

[0038] Providing a base substrate, and arranging a filter layer on one side of the base substrate, wherein the filter layer comprises a light-shielding structure, an optical structure, and filter films of multiple colors, the optical structure is arranged on a side of the light-shielding structure away from the base substrate, the orthographic projection of the light-shielding structure on the base substrate at least partially overlaps with the orthographic projection of the optical structure on the base substrate, and the filter film is arranged between adjacent light-shielding structures;

[0039] A covering layer is provided on a side of the filter layer away from the substrate, and the refractive index of the optical structure is smaller than the refractive index of the covering layer;

[0040] Wherein, the filter layer is provided on one side of the base substrate, comprising:

[0041] A patterned light shielding structure is provided on one side of the base substrate;

[0042] A patterned optical structure is provided on a side of the patterned light shielding structure away from the substrate;

[0043] Disposing a filter film between adjacent shading structures; or,

[0044] A patterned light shielding structure is provided on one side of the base substrate;

[0045] Disposing a filter film between the adjacent shading structures;

[0046] A patterned optical structure is arranged on a side of the patterned light-shielding structure away from the substrate.

[0047] The color filter substrate provided in the embodiment of the present application is provided with a filter layer on one side of the base substrate, wherein the filter layer includes a light-shielding structure, an optical structure and a filter film. By providing the optical structure on the side of the cover layer away from the first substrate, and providing the refractive index of the optical structure to be smaller than the refractive index of the cover layer, the optical path of the light is changed, so that the light that would have been blocked by the light-shielding structure is refracted by the optical structure, and the light path is changed, and the light can avoid the light-shielding structure and enter the filter film, and by providing the transmittance of the optical structure to be greater than the transmittance of the light-shielding structure, the light emission rate can be further improved, thereby improving the transmittance and display brightness of the display panel, thereby improving the contrast of the display panel and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0049] Figure 2 A schematic optical path diagram of a color filter substrate provided in an embodiment of the present application;

[0050] Figure 3 A schematic optical path diagram of a display panel provided in an embodiment of the present application;

[0051] Figure 4 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0052] Figure 5 A schematic optical path diagram of another color filter substrate provided in an embodiment of the present application;

[0053] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0054] Figure 7 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0055] Figure 8A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0056] Fig. 9 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0057] Fig.10 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0058] Fig.11 An enlarged view of a film layer of a display panel provided in an embodiment of the present application;

[0059] Fig.12 An enlarged view of a film layer of another display panel provided in an embodiment of the present application;

[0060] Fig.13 A schematic curve diagram of the flatness of a filter film provided in an embodiment of the present application;

[0061] Fig.14 A refractive index variation curve diagram of an optical structure provided in an embodiment of the present application;

[0062] Fig.15 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0063] Fig.16 A schematic structural diagram of a display device provided in an embodiment of the present application;

[0064] Fig.17 A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0066] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0067] In view of this, embodiments of the present application provide a display panel and a display device, which can improve the display effect.

[0068] According to a first aspect of the embodiments of the present application, a display panel is provided. Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. For example, Figure 1 As shown, the color filter substrate includes a base substrate 111, a filter layer 100 and a cover layer 400. The base substrate 111 can be a silicon wafer, a glass substrate or a flexible substrate. The filter layer 100 is arranged on one side of the base substrate 111. The filter layer 100 includes a light shielding structure 103, an optical structure 102 and a filter film 101 of multiple colors. The optical structure 102 is arranged on the side of the light shielding structure 103 away from the base substrate 111. The orthographic projection of the light shielding structure 103 on the base substrate 111 overlaps with the orthographic projection of the optical structure 102 on the base substrate 111 at least partially. The filter film 101 is arranged between adjacent light shielding structures 103. The cover layer 400 is arranged on the side of the filter layer 100 away from the base substrate 111. The refractive index of the optical structure 102 is less than the refractive index of the cover layer 400.

[0069] refer to Figure 1 In the case of the optical structure 102, the first light S1 incident from the cover layer 400 is refracted by the filter film 101 to the second light S2, and the second light S2 is refracted by the optical structure 102 to obtain the third light S3, which is deflected at the edge of the shading structure 103, and the third light S3 enters the filter film 101, thereby avoiding being blocked by the shading structure 103, and the light is gathered to be emitted at a positive viewing angle, thereby improving the light output efficiency of the display panel, improving the brightness of the display panel, and further improving the contrast. The transmittance of the optical structure is greater than the transmittance of the shading structure, and the absorption of light by the optical structure can be ignored, which greatly improves the utilization rate of light, and at the same time, a low-transmittance shading structure is used to ensure the shading effect.

[0070] Thin Film Transistor Liquid Crystal Display (TFT-LCD) has the characteristics of small size, low power consumption, high image quality, no radiation and easy to carry, and has been rapidly developed in recent years. The contrast of TFT-LCD is the ratio of the transmittance under pure white brightness to the transmittance under pure black brightness. In the related art, the transmittance of TFT-LCD under pure white brightness is relatively low.

[0071] Figure 2 A schematic optical path diagram of a color filter substrate provided in an embodiment of the present application. Figure 2 As shown, Figure 2 It is a color filter substrate in an existing LCD. When the optical structure 102 is not set, the refractive index of the filter film 101 is greater than that of the cover layer 400. Therefore, the first light S1 incident from the cover layer 400 is refracted by the filter film 101 to obtain the second light S2. The second light S2 is blocked by the shading structure 103 after passing through the filter film 101, thereby losing part of the transmittance.

[0072] The color filter substrate provided in the embodiment of the present application is provided with a filter layer on one side of the base substrate, wherein the filter layer includes a light-shielding structure, an optical structure and a filter film. By providing the optical structure on the side of the cover layer away from the first substrate, and providing the refractive index of the optical structure to be smaller than the refractive index of the cover layer, the optical path of the light is changed, so that the light that would have been blocked by the light-shielding structure is refracted by the optical structure, and the light path is changed, and the light can avoid the light-shielding structure and enter the filter film, and by providing the transmittance of the optical structure to be greater than the transmittance of the light-shielding structure, the light emission rate can be further improved, thereby improving the transmittance and display brightness of the display panel, thereby improving the contrast of the display panel and improving the display effect.

[0073] Illustratively, in an embodiment of the present application, the material of the optical structure is the same as the material of the support column.

[0074] In some other embodiments of the present application, the material of the optical structure is different from the material of the supporting column.

[0075] Figure 3A schematic optical path diagram of a display panel provided in an embodiment of the present application. In some embodiments, the light incident on the optical structure via the cover layer includes a first light ray S1, the incident angle of the first light ray S1 incident on the interface between the optical structure 102 and the cover layer 400 is a first incident angle a1, the angle range of the first incident angle a1 is 30° to 60°, and the first light ray S1 is used to be incident on the filter film 101 closest to the optical structure via the optical structure 102 and then emitted to the display side D. The deflection angle range of the first light ray S1 after entering the optical structure 102 is 3.1° to 9.1°.

[0076] When light enters different media, refraction occurs. The calculation formulas for the angle of incidence and the angle of refraction are as follows:

[0077] n 0 ×sinθ n0 =n 1 ×sinθ n1

[0078] In the formula, n0 is the refractive index of the incident light medium, n1 is the refractive index of the refracted light medium, and θ n0 is the incident angle, θ n1 is the refraction angle. From the formula, we can get that when light enters a medium with a high refractive index into a medium with a low refractive index, θ n1 >θ n0 , light diverges; when light enters a high refractive index medium from a low refractive index medium, θ n1 <θ n0 , the light converges. The light path diagram of the edge of the shading structure is as follows Figure 1 As shown, the edge of the light shielding structure 103 will be overlapped with the filter film 101, and the film layer arrangement is the base substrate 111, the filter film 101, and the cover layer 400. The refractive index of the filter film (>1.6) is higher than that of the cover layer 400 (1.55), so the light incident from the cover layer 400 is refracted by the filter film 101, and the refraction angle is small, the light is converged, and the light is blocked by the light shielding structure 103 after passing through the filter film 101, thereby losing part of the transmittance. By adding a low-refractive-index optical structure 102 to the light shielding structure 103, the light path can be changed. The light that would have been blocked by the edge of the light shielding structure 103 is changed after refraction, and can avoid the edge of the light shielding structure, thereby improving the transmittance and display brightness, and thus improving the contrast of the liquid crystal display.

[0079] According to the above formula, the lower the refractive index of the optical compensation structure material, the greater the deflection angle of the refracted light. The current refractive index of the support column material is relatively low, at around 1.5. The optical compensation structure can be made using the current PS material, so the refractive index of the optical compensation structure should be below 1.5. The lower the refractive index of the optical compensation structure, the better the refraction effect can be achieved.

[0080] For example, Figure 3 As shown, the refractive index of the cover layer n0 = 1.55, the refractive index of the filter film 101 n1 = 1.65, and the optical compensation structure 102 uses the current support column material n2 = 1.5 for simulation calculation: when the first incident angle a1 of the first light S1 incident on the optical structure 102 is 30°, θ n2 -θ n1 =3.1°, that is, under this condition, the optical structure 102 can deflect the light by 3.1° compared with the filter film 101; when the first incident angle a1 of the first light S1 incident on the optical structure 102 is 60°, θ n2 -θ n1 =9.1°, that is, under this condition, the optical structure 102 can deflect the light by 9.1° compared with the filter film.

[0081] In some embodiments, reference Figure 1 The orthographic projection of the optical structure 102 on the base substrate 111 overlaps with the edge of the orthographic projection of the filter film 101 on the base substrate 111, which can prevent light from leaking between adjacent shading structures, so that the light at the edge of the shading structure can smoothly enter the filter film to avoid light leakage.

[0082] Exemplary, reference Figure 1 , the display panel includes a driving substrate 200 and a filter layer 100. The driving substrate 200 includes a first substrate 202 and a driving layer 201. The first substrate 202 may be a silicon wafer, a glass substrate or a flexible substrate. A pixel circuit is arranged in the driving layer 201. The pixel circuit may include a plurality of thin film transistors arranged in an array. The driving layer 201 is arranged on one side of the first substrate 202. The filter layer 100 is arranged on a side of the driving layer 201 away from the first substrate 202. The filter layer 100 includes a shading structure 103, an optical structure 102 and a filter film 101. The shading structure 103 is arranged on a side of the optical structure 102 away from the driving substrate 200. The orthographic projection of the shading structure 103 on the first substrate 202 overlaps with the orthographic projection of the optical structure 102 on the first substrate 202, and the filter film 101 is arranged between adjacent shading structures 103. The covering layer 400 is arranged between the filter layer and the driving substrate. By setting the refractive index of the optical structure 102 to be smaller than that of the covering layer 400, the refractive index of the optical structure is smaller than that of the shading structure, and the transmittance of the optical structure is greater than that of the shading structure, the light originally entering the shading structure enters the filter layer, thereby improving the display effect of the display panel.

[0083] Figure 4 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figure 5A schematic optical path diagram of another color filter substrate provided in an embodiment of the present application. The drawings in the present application are all cross-sectional views, and the cross-sections of the optical structure, the light shielding structure and the filter film are parallel to each other. , refer to Figure 4 , the orthographic projection of the optical structure 102 on the substrate 111 is a first projection, and the maximum size of the first projection in the first direction X is a first size L1, wherein the first direction is the direction of the plane where the line connecting two adjacent filter films is located, the first direction is parallel to the cross section of the optical structure 102, and the first direction X is parallel to the substrate 111. The orthographic projection of the light shielding structure 103 on the first substrate 202 is a second projection, and the maximum size of the second projection in the first direction X is a second size L2, and the orthographic projection of the filter film 101 on the first substrate 202 is a third projection, and the maximum size of the third projection in the first direction X is a third size L3.

[0084] For example, Figure 4 As shown, the first size L1 can be less than or equal to the second size L2, and the first projection covers the second projection, so that the orthographic projection boundary of the shading structure 103 on the base substrate 111 intersects with the orthographic projection boundary of the filter film 101 on the base substrate 111, thereby preventing the fourth light S4 emitted by the backlight module from leaking out from the gap between the shading structure 103 and the filter film 101 without passing through the filter film, resulting in white spots on the display screen.

[0085] For example, Figure 5 As shown, the angle between the side surface of the optical structure 103 along the second direction Y and the plane where the base substrate 111 is located is in the range of 60° to 90°, and the second direction Y is a direction perpendicular to the plane where the base substrate 111 is located. By setting the second angle and setting the first size L1 to be smaller than or equal to the second size L2, it is possible to prevent the fourth light S4 emitted by the backlight module from leaking from the gap between the light shielding structure 103 and the light filter 101 without passing through the light filter, resulting in white spots appearing on the display screen.

[0086] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figure 6 As shown, the first size L1 can be smaller than the third size L3, and there is an overlap between the third projection and the first projection, which can prevent light from leaking between adjacent shading structures, so that the light at the edge of the shading structure can smoothly enter the filter film, thereby improving the brightness and contrast of the display panel, and further improving the display effect of the display panel.

[0087] The display panel provided in the embodiment of the present application, by setting the first projection to cover the second projection, avoids the shading structure from blocking the light emitted from the optical structure, and ensures that more light enters the filter film after passing through the optical structure. By setting the overlap between the third projection and the first projection, it is possible to avoid light leakage between adjacent shading structures, so that the light at the edge of the shading structure can smoothly enter the filter film. It can not only ensure that more light can smoothly enter the filter film, but also avoid light leakage, greatly improving the display brightness and contrast of the display panel, and thus improving the display effect of the display panel.

[0088] In some embodiments, the orthographic projection of the end of the optical structure close to the first substrate 302 is the fourth projection, and the size of the fourth projection in the first direction X is the fourth size. The orthographic projection of the end of the optical structure away from the first substrate 202 is the fifth projection, and the size of the fifth projection in the first direction is the fifth size. By setting the optical structure, the shading structure and the filter film, on the one hand, the processing cost can be saved, and on the other hand, the quality of the display panel can be improved.

[0089] In some embodiments, the orthographic projection of the optical structure away from the end of the base substrate 111 is a fourth projection, and the size of the fourth projection in the first direction X is a fourth size. The orthographic projection of the optical structure close to the end of the base substrate is a fifth projection, and the size of the fifth projection in the first direction is a fifth size. By setting the optical structure, the shading structure and the filter film, on the one hand, the processing cost can be saved, and on the other hand, the quality of the display panel can be improved.

[0090] Figure 7 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. For example, Figure 7 As shown, the contact surface between the optical structure 102 and the filter film 101 includes a plane 104, and the fourth dimension L4 is smaller than the fifth dimension L5.

[0091] Exemplarily, the preparation process of the display panel may be: a light shielding structure 103 is arranged on one side of the first substrate 202, and an optical structure 102 is prepared on the light shielding structure 103 by exposure and development. The optical structure 102 is exposed using the same mask plate as the light shielding structure 103 during the exposure process, and the exposure pattern of the optical structure 102 is the same as the exposure pattern of the light shielding structure 103. The filter film 101 is uniformly coated between adjacent light shielding structures 103 by a coating device, and the thickness of the filter film 101 can be adjusted according to actual needs, and the filter film 101 with a suitable film thickness is formed by controlling the amount of glue applied and the coating speed of the coating machine. By setting the contact surface between the optical structure and the filter film to a plane, the fourth dimension L4 is smaller than the fifth dimension L5, so as to accurately control the size of the optical structure. By using the same mask plate to prepare the optical structure and the light shielding structure, the use of a mask plate can be reduced, the difficulty of process processing can be reduced, and the processing cost can be saved. After the optical structure is prepared, a second substrate can be obtained. The display panel can be obtained by bonding the second substrate to the driving substrate, with the side where the optical structure is located facing the driving substrate.

[0092] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. For example, Figure 8 As shown, the contact surface between the optical structure 102 and the filter film 101 includes a curved surface 105, and the fourth dimension L4 is greater than the fifth dimension L5. The manufacturing process of the display panel is: first, a light shielding structure is prepared on one side of the first substrate 202 by exposure and development, and then a filter film 101 is set between adjacent light shielding structures 103 by exposure and development, and then the optical structure 102 is prepared on the filter film by exposure and development. The optical structure 102 is exposed using the same mask plate as the light shielding structure 103 during the exposure process. The exposure pattern of the optical structure 102 is the same as the exposure pattern of the light shielding structure 103. The optical structure 102 of different shapes is formed by over-engraving, so that the fourth dimension L4 is greater than the fifth dimension L5, so as to accurately control the size of the optical structure. By using the same mask plate to prepare the optical structure and the light shielding structure, the use of a mask plate can be reduced, the difficulty of process processing can be reduced, and the processing cost can be saved. By adjusting the preparation order of the filter film and the optical structure, the optical structure can be used as a flattening between the filter films of different colors, so that the flattening effect of the subsequent film layer processing is better.

[0093] Exemplarily, the optical structure 102 is exposed using a mask different from that of the light shielding structure 103 during the exposure process, and the exposure pattern of the optical structure 102 is different from that of the light shielding structure 103, so that the fourth dimension L4 is greater than the fifth dimension L5, so as to form a curved surface 105 at the contact surface between the optical structure 102 and the filter film 101. By setting different masks, the size of the optical structure can be accurately controlled, so that the optical structure can be used as a flattening between filter films of different colors, so as to achieve a better flattening effect in subsequent film layer processing.

[0094] The color film substrate provided in the embodiment of the present application can reduce the processing difficulty of the display panel and save the processing cost of the display panel by using the same mask plate to prepare the shading structure and the optical structure. By adjusting the preparation order of the optical structure and the filter film, the flatness effect between the film layers can be improved, and the quality of the display panel can be improved. By adjusting the preparation method of the optical structure, the shading structure and the filter film, while improving the quality of the display panel, the difficulty of the process processing is reduced, the processing cost is saved, and the product diversity of the display panel is further improved.

[0095] In some embodiments, the orthographic projection of the end of the filter film away from the first substrate is the sixth projection. The contact surface between the optical structure and the filter film may include a plane, the fifth projection and the sixth projection overlap, and the film layer preparation order of the display panel is: first prepare the light shielding structure, then prepare the optical structure, and then prepare the filter film.

[0096] In some embodiments, the base substrate is used as the reference film layer, that is, the orthographic projection of the filter film close to one end of the base substrate is the sixth projection. The contact surface between the optical structure and the filter film may include a curved surface, the fourth projection and the sixth projection overlap, and the film layer preparation order of the display panel is: first prepare the light shielding structure, then prepare the filter film, and then prepare the optical structure. By setting different preparation orders between the film layers, the diversity of display panel products can be achieved.

[0097] In some embodiments, the sum of the thickness of the optical structure in the second direction and the thickness of the light shielding structure in the second direction is the first thickness, and the second direction is a direction perpendicular to the plane where the first substrate is located, wherein the second direction Y is a direction perpendicular to the plane where the substrate 111 is located. In the process of preparing the filter layer, the thickness of the filter film of at least one color can be set to the second thickness. By setting the first thickness to be the same as the second thickness, the flatness effect of the filter layer can be improved to facilitate the preparation of subsequent film layers.

[0098] Fig. 9 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Fig. 9As shown, the thickness of the optical structure 102 in the second direction Y is the same as the thickness of the light shielding structure 103 in the second direction, and the surface of the optical structure 102 on one side away from the base substrate 111 is flush with the surface of the filter film 101 on one side away from the base substrate 111. The thickness of the optical structure 102 in the second direction is a third thickness H3, and the thickness of the light shielding structure 103 in the second direction Y is a fourth thickness H4. By setting the third thickness to be the same as the fourth thickness, the consistency of the preparation of the optical structure and the light shielding structure can be improved, and the difficulty of processing the display panel can be reduced.

[0099] In some embodiments, the preparation order of the filter layer of the display panel may be: first prepare the shading structure, then prepare the optical structure, and then prepare the filter film. The preparation order of the filter layer of the display panel may also be: first prepare the shading structure, then prepare the filter film, and then prepare the optical structure. Among them, the optical structure and the shading structure are prepared by the same mask. The preparation order of the optical structure and the shading structure is different, and the mask plates used for the optical structure and the shading structure are the same, so that during the preparation process of the filter layer, the change of the optical path can be achieved, and the increase in the number of mask plates used can be avoided, thereby reducing the processing difficulty of the filter layer.

[0100] In some embodiments, a surface of the optical structure on one side close to the first substrate is flush with a surface of at least one color filter film on one side close to the first substrate, and the at least one color filter film can be any one of a red filter film, a green filter film, and a blue filter film. By setting the optical structure, the unoverlapped portion of the filter film is filled, and it is also beneficial to space the filter films of different colors, avoiding overlapping of the filter films of different colors to cause subsequent film layers to bulge, thereby reducing the step difference between the film layers and improving the flatness of the subsequent film layers.

[0101] For example, Figure 1As shown, the display panel includes a driving substrate 200 and a filter layer 100, the driving substrate 200 includes a first substrate 202 and a driving layer 201, and the filter layer 100 includes a shading structure 103, an optical structure 102 and a filter film 101. The driving layer 201 can be arranged on one side of the first substrate 202, the driving layer can be used to drive the pixel to emit light, and the filter layer 100 is used to filter the light emitted by the pixel. The shading structure 103 can be arranged on the side of the optical structure 102 away from the driving substrate 200, and the orthographic projection of the shading structure 103 on the first substrate 202 overlaps with the orthographic projection of the optical structure 102 on the first substrate 202. The shading structure 103 can avoid color mixing of light between adjacent pixels, avoid color deviation and improve color purity. The filter film 101 is arranged between adjacent shading structures 103. The filter film 101 can be arranged in the hollow of the shading structure. The filter film 101 can be used to filter light and transmit light of the target color. Different filter films are used to transmit light of different colors to achieve color display. The cover layer 400 is arranged between the filter layer 100 and the driving substrate 200. The optical structure 102 is arranged on the side of the cover layer 400 away from the first substrate 202. The refractive index of the optical structure 102 is less than the refractive index of the cover layer 400. The light emitted by the pixel enters the optical structure 102 with a low refractive index from the cover layer 400 with a high refractive index. The light diverges, so that the light that would have been blocked by the shading structure 103 is refracted by the optical structure 102, and the light path is changed. The light can avoid the shading structure 103 and enter the filter film 101.

[0102] Typically, commonly used display panels only have a black matrix and a filter structure. After the light from the display panel passes through multiple film layers, metal wires and the black matrix, it is easy to cause the transmittance and contrast of the display panel to become low, affecting the display effect of the display. However, because the shading structure can avoid the problem of color mixing between pixels, the shading structure still needs to be retained.

[0103] The display panel provided by the embodiment of the present application is provided with a driving layer on one side of the first substrate, and a light shielding structure, an optical structure and a filter film are provided on the side of the driving layer away from the first substrate. By providing the optical structure on the side of the cover layer away from the first substrate, and providing the refractive index of the optical structure to be smaller than the refractive index of the cover layer, the optical path of the light is changed, so that the light that would have been blocked by the light shielding structure is refracted by the optical structure, and the light can avoid the light shielding structure and enter the filter film, thereby improving the transmittance and display brightness of the display panel, and then improving the contrast of the display panel and improving the display effect.

[0104] It should be noted that the display panel provided in the embodiment of the present application is applicable to liquid crystal display technology and also to organic light-emitting semiconductor display technology. The display panel is applied to liquid crystal display, the driving layer drives the liquid crystal to flip, and the light enters the filter film after being refracted by the optical structure to realize the light emission of the display panel. The display panel is applied to organic light-emitting semiconductor display, the driving layer drives the light-emitting device to emit light, and the light enters the filter film after being refracted by the optical structure to realize the light emission of the display panel. The display panel in the present application can be compatible with display technologies such as liquid crystal display and organic light-emitting semiconductor display technology, thereby improving the compatibility of the display panel.

[0105] In some embodiments, the orthographic projection of the optical structure on the first substrate overlaps with the edge of the orthographic projection of the filter film on the first substrate. By arranging the orthographic projection of the optical structure on the first substrate to overlap with the edge of the orthographic projection of the filter film on the first substrate, light leakage between adjacent shading structures is avoided, so that light at the edge of the shading structure smoothly enters the filter film, thereby avoiding light leakage.

[0106] For example, Figure 1 As shown, the optical structure 102 is arranged on a side of the light shielding structure 103 away from the first substrate 202, and the filter film 101 is arranged between adjacent light shielding structures 103. The orthographic projection of the optical structure 102 on the first substrate 202 overlaps with the edge of the orthographic projection of the filter film 101 on the first substrate 202, and the light enters the optical structure 102 and then enters the filter film 101 after being refracted, which can prevent the light from leaking between the adjacent light shielding structures 103, so that the light at the edge of the light shielding structure can smoothly enter the filter film, thereby improving the display brightness of the display panel and further improving the display effect of the display panel.

[0107] Fig.10 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some embodiments, reference Fig.10The display panel further includes a base substrate 111, a liquid crystal layer 500 and a support column 501. The base substrate 111 is disposed on a side of the filter layer 100 away from the driving substrate 200, and the base substrate 111 can be used as a substrate for preparing the filter layer 100. The liquid crystal layer 500 is disposed between the driving substrate 200 and the filter layer 100. The cover layer 400 is disposed on a side of the optical structure 102 away from the base substrate 111, and the cover layer 400 is used to flatten the filter layer 100. The refractive index of the cover layer 400 is greater than the refractive index of the optical structure 102. The support column 501 is disposed between the cover layer 400 and the driving substrate 200, and the orthographic projection of the support column 501 on the base substrate 111 overlaps with the orthographic projection of the light shielding structure 103 on the base substrate 111. The support column 501 is used to support the substrates on both sides of the liquid crystal layer 500 to support the thickness of the liquid crystal box. The liquid crystal layer 500 is driven by the driving layer 201 to emit light, and the light enters the high refractive index covering layer 400 from the low refractive index liquid crystal layer 500. The driving layer 201 drives the liquid crystal in the liquid crystal layer 500 to flip and emit light, and the light enters the low refractive index optical structure 102 after passing through the high refractive index covering layer 400. The light is divergent, and the light originally entering the shading structure 103 is refracted into the filter film 101, thereby improving the display effect of the display panel.

[0108] Exemplary, reference Fig.10 The display panel further includes a conductive layer 600. The conductive layer 600 is disposed on the side of the base substrate 111 away from the filter layer. The conductive layer 600 can conduct static charges generated by the display panel to prevent charge accumulation on the surface of the display panel and avoid damage to the display panel.

[0109] Fig.11 This is an enlarged view of a film layer of a display panel provided in an embodiment of the present application. Fig.12 This is an enlarged view of the film layer of another display panel provided in an embodiment of the present application. Figures 11 to 12 As shown, the cover layer 400 is used to flatten the filter films of different colors.

[0110] Fig.13 A schematic curve diagram of the flatness of a filter film provided in an embodiment of the present application. For example, Fig.13 As shown, the ordinate represents the flatness of the cover layer 400. The first region A1 represents that the blue filter film B and the green filter film G are not overlapped, and the cover layer 400 has a depression at the position between the blue filter film B and the green filter film G, corresponding to the trough in the first region A1. The second region A2 represents that the red filter film R and the blue filter film B are overlapped, and the cover layer 400 has a protrusion at the position where the blue filter film B and the green filter film G overlap, corresponding to the peak in the second region A2.

[0111] like Fig.11As shown, when the blue filter film B and the green filter film G are not overlapped, the film surface of the cover layer 400 will have an obvious depression toward the base substrate 111, resulting in a decrease in the flatness of the film surface of the cover layer 400. In the embodiment of the present application, by adding an optical compensation structure between the filter films of different colors, the cover layer 400 is conducive to filling the non-overlapping parts of the filter films of different colors, reducing the depression of the film surface of the cover layer 400 and improving the flatness of the film surface of the cover layer 400.

[0112] like Fig.12 As shown, when the red filter film R and the blue filter film B overlap, the convexity of the film surface of the cover layer 400 will be more obvious at the overlap of the filter films of different colors, and the step difference will be larger, resulting in a decrease in the flatness of the film surface of the cover layer 400. In the embodiment of the present application, by adding an optical compensation structure between the filter films of different colors, it is beneficial to space the filter films of different colors, prevent the overlap of the filter films of different colors from causing the film surface of the cover layer 400 to bulge, thereby reducing the step difference and improving the flatness of the film surface of the cover layer 400.

[0113] Exemplarily, the lower the refractive index of the optical structure, the greater the deflection angle of the refracted light. The refractive index of the optical structure is less than 1.5, the refractive index of the filter film is greater than 1.6, the refractive index of the cover layer 400 ranges from 1.54 to 1.55, and the refractive index of the liquid crystal layer is less than 1.48. Exemplarily, when the refractive index of the cover layer 400 is 1.55 and the refractive index of the filter film is 1.65, the refractive index of the optical structure is set to 1.5. When the refractive index of the cover layer is 1.54 and the refractive index of the filter film is 1.8, the refractive index of the optical structure is set to 1.4. By setting an optical structure with a low refractive index, the deflection angle of the light becomes larger, and more light that originally enters the shading structure is refracted to the filter film, so as to improve the display brightness and contrast of the display panel.

[0114] In some embodiments, the covering layer is provided with grooves or vias, and the grooves or vias are used to embed the support columns to improve the stability of the support columns.

[0115] Exemplarily, one end portion of the support column close to the second substrate is embedded in a groove, and the groove can be set in the covering layer. The support column can also be embedded in the groove at one end portion away from the second substrate, and the groove can be set in the driving layer. The orthographic projection of the groove on the second substrate falls within the orthographic projection of the shading structure on the second substrate. Alternatively, one end portion of the support column close to the second substrate is embedded in a via hole, and the via hole can be set in the covering layer. Alternatively, one end portion of the support column away from the second substrate is embedded in a via hole, and the via hole can be set in the driving layer, and the orthographic projection of the via hole on the second substrate falls within the orthographic projection of the shading structure on the second substrate. By setting the groove or the via hole, the support column can be limited so that the support column stably supports the liquid crystal layer. To improve the stability of the display panel.

[0116] Exemplarily, the covering layer can be used as the base of the support column, and the improvement of the flatness of the covering layer can enhance the stability of the support column. In addition, after adding the optical structure, the film layer arrangement of the support column position changes from a shading structure, a filter film and a covering layer to a shading structure, an optical structure and a covering layer. In an embodiment of the present application, the elasticity of the material of the optical structure is higher than the elasticity of the material of the filter film. After the film layer arrangement of the support column position is changed to a shading structure, an optical structure and a covering layer, the film layer at the support column position has higher elasticity. When the liquid crystal display is subjected to pressure, the film layer at the support column position can provide a better buffering effect. As a result, the pressure resistance of the liquid crystal display is improved.

[0117] In some embodiments, the wavelength of the first light is in the range of 300 nm to 1000 nm, and the refractive index of the optical structure is related to the wavelength of the light. As the wavelength of the light increases, the refractive index of the optical structure gradually decreases.

[0118] Fig.14 The refractive index variation curve diagram of an optical structure provided in an embodiment of the present application is shown in FIG. Fig.14 As shown, the horizontal axis represents the wavelength of the first light S1, in nm, and the vertical axis represents the refractive index of the optical structure. When the wavelength of the first light S1 is 300 nm, the refractive index of the cover layer 400 can be set to 1.54, the refractive index of the filter film 101 can be set to 1.65, the refractive index of the optical structure 102 can be set to 1.53, and the refractive index of the liquid crystal layer 500 can be set to 1.48. When the wavelength of the first light S1 is 633 nm, the refractive index of the filter film 101 can be set to 1.6, the refractive index of the cover layer 400 can be set to 1.55, the refractive index of the optical structure 102 can be set to 1.52, and the refractive index of the liquid crystal layer 500 can be set to 1.44. When the wavelength of the first light S1 is 1000 nm, the refractive index of the cover layer 400 can be set to 1.54, the refractive index of the filter film 101 can be set to 1.8, the refractive index of the optical structure 102 can be set to 1.51, and the refractive index of the liquid crystal layer 500 can be set to 1.40. By providing an optical structure with a low refractive index, the deflection angle of the light is increased, and more light originally entering the light-shielding structure is refracted to the filter film, thereby improving the display brightness and contrast of the display panel.

[0119] According to a second aspect of the embodiments of the present application, a display panel is provided. Fig.15 A schematic structural diagram of a display panel provided for the implementation of this application. Fig.15 As shown, the display panel 2000 includes the color filter substrate 1000 of the first aspect and a driving substrate arranged opposite to the color filter substrate 1000 , and the liquid crystal layer is arranged between the color filter substrate and the driving substrate.

[0120] The display panel provided by the embodiment of the present application drives the liquid crystal in the liquid crystal layer to flip the outgoing light by setting a driving substrate, and sets a filter layer on one side of the substrate, sets the optical structure on the side of the cover layer away from the first substrate, and sets the refractive index of the optical structure to be smaller than the refractive index of the cover layer, so as to change the optical path of the light, so that the light that would originally be blocked by the shading structure is refracted by the optical structure, and the optical path is changed, and the light can avoid the shading structure and enter the filter film, and by setting the transmittance of the optical structure to be greater than the transmittance of the shading structure, the light emission rate can be further improved, thereby improving the transmittance and display brightness of the display panel, thereby improving the contrast of the display panel and improving the display effect.

[0121] According to a third aspect of the embodiments of the present application, a display device is provided. Fig.16 Schematic diagram of a display device provided in an embodiment of the present application. Fig.16 As shown, the display device 3000 includes the display panel 2000 of the second aspect, and a display module on the light incident side of the display panel.

[0122] The display device provided in the embodiment of the present application, the display module is used for emitting light, by setting a filter layer on one side of the substrate, wherein the filter layer includes a shading structure, an optical structure and a filter film. By setting the optical structure on the side of the cover layer away from the first substrate, and setting the refractive index of the optical structure to be less than the refractive index of the cover layer, the light emitted by the display module changes its optical path after passing through the filter layer, so that the light that would have been blocked by the shading structure changes its optical path after being refracted by the optical structure, and the light can avoid the shading structure and enter the filter film, and by setting the transmittance of the optical structure to be greater than the transmittance of the shading structure, the light emission rate can be further improved, thereby improving the transmittance and display brightness of the display panel, thereby improving the contrast of the display panel and improving the display effect.

[0123] In some embodiments, in combination Fig.14 As the wavelength of light increases, the refractive index will gradually decrease. When the wavelength of the outgoing light of the backlight module is 633, the refractive index of the cover layer ranges from 1.54 to 1.55, and the refractive index of the optical structure is less than 1.5.

[0124] According to a fourth aspect of the embodiments of the present application, a method for preparing a display panel is provided. Fig.17 The following is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application. Fig.17 As shown, the method for preparing the display panel includes:

[0125] S701: Provide a base substrate, and set a filter layer on one side of the base substrate. The filter layer includes a light-shielding structure, an optical structure, and filter films of multiple colors. The optical structure is set on the side of the light-shielding structure away from the base substrate. The orthographic projection of the light-shielding structure on the base substrate at least partially overlaps with the orthographic projection of the optical structure on the base substrate. The filter film is set between adjacent light-shielding structures.

[0126] Exemplarily, the substrate may be a silicon wafer, a glass substrate or a flexible substrate, the optical structure is arranged on a side of the light shielding structure away from the substrate, the orthographic projection of the light shielding structure on the substrate overlaps with the orthographic projection of the optical structure on the substrate, the filter film is arranged between adjacent light shielding structures, and the cover layer is arranged on a side of the filter layer away from the substrate.

[0127] S702: Disposing a covering layer on a side of the filter layer away from the base substrate, wherein the refractive index of the optical structure is smaller than the refractive index of the covering layer.

[0128] Exemplarily, the refractive index of the optical structure is less than that of the cover layer. The light incident from the cover layer is refracted by the optical structure and deflected at the edge of the light-shielding structure, and directly enters the filter film, thereby avoiding being blocked by the light-shielding structure, and focusing the light to be emitted at a normal viewing angle, thereby improving the light output efficiency of the display panel, improving the brightness of the display panel, and thus improving the contrast.

[0129] In some embodiments, a filter layer is provided on one side of the substrate, including:

[0130] Firstly, a patterned shading structure is arranged on one side of the base substrate, then a patterned optical structure is arranged on the side of the patterned shading structure away from the base substrate, and then a filter film is arranged between adjacent shading structures to obtain a color filter substrate.

[0131] In some embodiments, a filter layer is provided on one side of the base substrate, and the method may further include:

[0132] Firstly, a patterned shading structure is arranged on one side of the base substrate, then a filter film is arranged between adjacent shading structures, and then a patterned optical structure is arranged on the side of the patterned shading structure away from the base substrate to obtain a color filter substrate.

[0133] The embodiment of the present application adjusts the preparation order of the optical structure and the filter film so as to change the angle at which the light is deflected, thereby achieving different display effects.

[0134] The display device provided in the embodiment of the present application may include a television, a computer, a smart phone, a smart wearable device, a laptop computer, a tablet computer, etc. The smart wearable device may include a smart watch, an AR (augmented reality) device, a VR (virtual reality) device, etc.

[0135] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0136] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0137] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0138] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A color film substrate, characterized in that: include: substrate substrate; A filter layer, the filter layer is arranged on one side of the base substrate, the filter layer comprises a light shielding structure, an optical structure and filter films of multiple colors, the optical structure is arranged on a side of the light shielding structure away from the base substrate, the orthographic projection of the light shielding structure on the base substrate at least partially overlaps with the orthographic projection of the optical structure on the base substrate, and the filter film is arranged between adjacent light shielding structures; A covering layer, the covering layer being arranged on a side of the filter layer away from the base substrate; Wherein, the refractive index of the optical structure is smaller than the refractive index of the covering layer.

2. The color film substrate according to claim 1, characterized in that: Also includes: A support column, the support column is located on a side of the cover layer away from the filter layer; The material of the optical structure is the same as that of the support column; Alternatively, the material of the optical structure is different from the material of the supporting pillar.

3. The color film substrate according to claim 1, characterized in that: The orthographic projection of the optical structure on the substrate is a first projection, and the maximum size of the first projection in the first direction is a first size; The orthographic projection of the light shielding structure on the first substrate is a second projection, and the maximum size of the second projection in the first direction is a second size; The orthographic projection of the filter film on the first substrate is a third projection, and the maximum dimension of the third projection in the first direction is a third dimension; The first direction is the direction of the plane where the line connecting two adjacent filter films is located; The first size is equal to or smaller than the second size; and / or, The angle between the side surface of the optical structure along the second direction and the plane where the substrate is located is in a range of 60° to 90°, and the second direction is a direction perpendicular to the plane where the substrate is located.

4. The color film substrate according to claim 3, characterized in that: The orthographic projection of the optical structure away from one end of the substrate is a fourth projection, and the size of the fourth projection in the first direction is a fourth size; The orthographic projection of the optical structure close to one end of the substrate is a fifth projection, and the size of the fifth projection in the first direction is a fifth size; The contact surface between the optical structure and the filter film includes a plane, and the fourth size is smaller than the fifth size; and / or, The contact surface between the optical structure and the filter film includes a curved surface, and the fourth dimension is greater than the fifth dimension.

5. The color film substrate according to claim 1, characterized in that: The orthographic projection of the optical structure away from the end of the substrate is a fourth projection; The orthographic projection of one end of the filter film close to the base substrate is the sixth projection; The contact surface between the optical structure and the filter film includes a curved surface, and the fourth projection overlaps with the sixth projection.

6. The color film substrate according to claim 5, characterized in that: The sum of the thickness of the optical structure in the second direction and the thickness of the light shielding structure in the second direction is the first thickness, wherein the second direction is a direction perpendicular to the plane where the substrate is located; The thickness of the filter film is a second thickness; The first thickness is the same as the second thickness, and a surface of the optical structure away from the substrate is flush with a surface of the filter film away from the substrate; and / or, The thickness of the optical structure in the second direction is the same as the thickness of the light shielding structure in the second direction.

7. The color film substrate according to claim 6, characterized in that: The optical structure and the light shielding structure are prepared using the same mask plate.

8. A display panel, characterized in that: include: The color filter substrate according to any one of claims 1 to 7, and a driving substrate arranged opposite to the color filter substrate; The liquid crystal layer is arranged between the driving substrate and the color filter substrate.

9. A display device, characterized in that: include: The display panel as claimed in claim 8, and a backlight module located on the light incident side of the display panel.

10. The display device according to claim 9, characterized in that: When the wavelength of the outgoing light of the backlight module is 633 nm, the refractive index of the cover layer is in the range of 1.54 to 1.55, and the refractive index of the optical structure is less than 1.

5.

11. A method for preparing a color film substrate, characterized in that: include: Providing a base substrate, and arranging a filter layer on one side of the base substrate, wherein the filter layer comprises a light-shielding structure, an optical structure, and filter films of multiple colors, the optical structure is arranged on a side of the light-shielding structure away from the base substrate, the orthographic projection of the light-shielding structure on the base substrate at least partially overlaps with the orthographic projection of the optical structure on the base substrate, and the filter film is arranged between adjacent light-shielding structures; A covering layer is provided on a side of the filter layer away from the substrate; the refractive index of the optical structure is smaller than the refractive index of the covering layer; Wherein, the filter layer is provided on one side of the base substrate, comprising: A patterned light shielding structure is provided on one side of the base substrate; A patterned optical structure is provided on a side of the patterned light shielding structure away from the substrate; Disposing a filter film between adjacent shading structures; or, A patterned light shielding structure is provided on one side of the base substrate; Disposing a filter film between the adjacent shading structures; A patterned optical structure is arranged on a side of the patterned light-shielding structure away from the substrate.

Images