A color film substrate, display panel and display device

Abstract

The application provides a color film substrate, a display panel and a display device to improve the transmittance of the display panel and reduce the power consumption of the display panel. The color film substrate comprises a substrate, a black matrix layer located on one side of the substrate, a first optical structure layer located between the substrate and the black matrix layer, the first optical structure layer comprising a plurality of first optical structures, and a second optical structure layer covering one side of the first optical structure layer away from the substrate, and the refractive index of the second optical structure layer is lower than the refractive index of the first optical structure.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a color filter substrate, a display panel, and a display device. Background Technology

[0002] A liquid crystal display (LCD) is a device that uses liquid crystal molecules to change their optical properties under the influence of an electric field. It typically consists of multiple layers, including two transparent substrates coated with semiconductor elements, a transparent conductive layer, an alignment layer, a liquid crystal layer, and various filters.

[0003] Liquid crystal molecules exist in two states: a rotated state and a parallel state. When liquid crystal molecules are in a rotated state, light is distorted and cannot pass through the liquid crystal layer; when liquid crystal molecules are in a parallel state, light can pass through the liquid crystal layer. The principle of a liquid crystal display (LCD) utilizes this optical property of liquid crystal molecules. By applying an electric field to both sides of the liquid crystal layer, the orientation of the liquid crystal molecules is controlled, thereby controlling the transmission or blocking of light to display images. Specifically, the liquid crystal layer in an LCD is divided into many small pixels. Each pixel has a switch and a pair of conductive layers. When the switch is turned on and voltage is applied to these conductive layers, they generate an electric field. Under the influence of this electric field, the liquid crystal molecules tend to follow the direction of the electric field, thus changing the optical properties of the liquid crystal layer.

[0004] However, current LCD panels suffer from low transmittance and high power consumption. Utility Model Content

[0005] This application provides a color filter substrate, a display panel, and a display device to improve the transmittance of the display panel and reduce its power consumption. The color filter substrate includes:

[0006] Substrate;

[0007] A black matrix layer is located on one side of the substrate;

[0008] A first optical structure layer is located between the substrate and the black matrix layer, and the first optical structure layer includes: a plurality of first optical structures;

[0009] A second optical structure layer covers the side of the first optical structure layer that is away from the substrate, and the refractive index of the second optical structure layer is lower than that of the first optical structure layer.

[0010] In one possible implementation, the black matrix layer includes: a light-shielding portion and a plurality of openings; the orthographic projection of the first optical structure on the substrate overlaps with the orthographic projection of the openings on the substrate.

[0011] In one possible implementation, the central region of the first optical structure projected onto the substrate coincides with the central region of the opening projected onto the substrate; and the peripheral projection of the first optical structure onto the substrate overlaps with the projection of the light-shielding portion onto the substrate.

[0012] In one possible implementation, the black matrix layer includes: a plurality of open rows extending along a first direction and arranged along a second direction; the open rows include a plurality of the openings;

[0013] In the direction from the substrate to the first optical structure, the width of the first optical structure tends to decrease in the first direction and / or the second direction.

[0014] In one possible implementation, the first optical structure has a trapezoidal cross-sectional shape perpendicular to the substrate and parallel to the first direction and / or the second direction;

[0015] The first optical structure has a first surface facing away from the substrate; the width of the first surface in the first direction is less than the width of the opening in the first direction; and / or, the width of the first surface in the second direction is less than the width of the opening in the second direction.

[0016] In one possible implementation, the first optical structure has a second surface facing the substrate; the width of the second surface in the first direction is greater than the width of the opening in the first direction; and / or, the width of the second surface in the second direction is greater than the width of the opening in the second direction.

[0017] In one possible implementation, the first optical structure has a side surface connecting the first surface and the second surface; the light-shielding portion includes: a first light-shielding portion; the orthographic projection of the side surface on the substrate covers the orthographic projection of the first light-shielding portion on the substrate;

[0018] The width of the side in the first direction is greater than the width of the first light-shielding part in the first direction; and / or, the width of the side in the second direction is greater than the width of the first light-shielding part in the second direction.

[0019] In one possible implementation, the width of the opening in the second direction is greater than its width in the first direction;

[0020] The first optical structure has a first trapezoidal cross-sectional shape perpendicular to the substrate and parallel to the first direction, and the first trapezoid has a first base angle; the first optical structure has a second trapezoidal cross-sectional shape perpendicular to the substrate and parallel to the second direction, and the second trapezoid has a second base angle; the second base angle is greater than the first base angle.

[0021] In one possible implementation, the first optical structure has a triangular cross-sectional shape perpendicular to the substrate and parallel to the first direction and / or the second direction, a convex surface protruding towards the black matrix layer, or a concave surface recessed towards the substrate.

[0022] In one possible implementation, the substrate has a plurality of recesses on the side facing the black matrix layer, and the first optical structure is located within the recesses.

[0023] In one possible implementation, the black matrix layer includes: a light-shielding portion and a plurality of openings; the orthographic projection of the first optical structure on the substrate overlaps with the orthographic projection of the light-shielding portion on the substrate.

[0024] In one possible implementation, the first optical structure includes: a scattering body, and scattering particles distributed within the scattering body; the refractive index of the scattering particles is different from the refractive index of the scattering body.

[0025] In one possible implementation, the refractive index of the first optical structure is in the range of 1.6 to 2.0; and the refractive index of the second optical structure layer is in the range of 1.3 to 1.5.

[0026] This application also provides a display panel, which includes an array substrate and a color filter substrate as described in this application embodiment.

[0027] This application also provides a display device, which includes the display panel as described in this application embodiment.

[0028] In one possible implementation, the display device further includes: a backlight module;

[0029] The backlight module is located on the side of the color filter substrate away from the array substrate, and the backlight module is located on the side of the substrate away from the first optical structure layer. Attached Figure Description

[0030] Figure 1 for Figure 2A A schematic diagram of the cross-section along the dashed line AA';

[0031] Figure 2A This is a schematic diagram of the stacking of the black matrix layer and the first optical structure provided in an embodiment of this application;

[0032] Figure 2B for Figure 2A Schematic diagram of a single film layer of the black matrix layer;

[0033] Figure 2C for Figure 2A A schematic diagram of a single film layer in the first optical structure.

[0034] Figure 3 for Figure 1 Another schematic diagram has been added to indicate this.

[0035] Figure 4 for Figure 2A A schematic diagram of the cross-section along the dashed line BB';

[0036] Figure 5 Another cross-sectional schematic diagram of the color filter substrate provided in the embodiments of this application;

[0037] Figure 6 Another cross-sectional schematic diagram of the color filter substrate provided in the embodiments of this application;

[0038] Figure 7 Another cross-sectional schematic diagram of the color filter substrate provided in the embodiments of this application;

[0039] Figure 8 Another cross-sectional schematic diagram of the color filter substrate provided in the embodiments of this application;

[0040] Figure 9 Another cross-sectional schematic diagram of the color filter substrate provided in the embodiments of this application;

[0041] Figure 10 Another cross-sectional schematic diagram of the color filter substrate provided in the embodiments of this application;

[0042] Figure 11 A cross-sectional schematic diagram of a display device provided in an embodiment of this application;

[0043] Figure 12 Another cross-sectional schematic diagram of the display device provided in the embodiments of this application;

[0044] Figure 13 A schematic diagram illustrating a process for fabricating a first optical structure layer and a second optical structure layer, provided for an embodiment of this application.

[0045] Figure 14 This is a schematic diagram illustrating a process for fabricating a first optical structure layer and a second optical structure layer, provided in an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0047] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0048] As used herein, “approximately” or “substantially the same” includes the stated value and means within an acceptable range of deviations from the specific value, as determined by a person skilled in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., limitations of the measurement system). For example, “substantially the same” may mean a difference relative to the stated value within one or more standard deviations, or within ±30%, 20%, 10%, or 5%.

[0049] In the accompanying drawings, the thicknesses of layers, films, panels, regions, etc., are enlarged for clarity. Exemplary embodiments are described herein with reference to cross-sectional views that are schematic diagrams of idealized embodiments. Thus, deviations from the shapes shown in the drawings will be expected as a result of, for example, manufacturing techniques and / or tolerances. Therefore, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather include deviations in shape caused, for example, by manufacturing processes. For example, regions illustrated or described as flat may typically have rough and / or non-linear characteristics. Furthermore, sharp corners illustrated may be rounded. Thus, the regions shown in the figures are schematic in nature, and their shapes are not intended to illustrate the precise shapes of the regions, nor are they intended to limit the scope of the claims.

[0050] To keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted.

[0051] See Figure 1 , Figures 2A-2C As shown, where, Figure 1 It can be Figure 2A A schematic diagram of the cross-section along the dashed line AA'. Figure 2A This is a schematic diagram of the stacking of the black matrix layer and the first optical structure provided in an embodiment of this application. Figure 2B for Figure 2A Schematic diagram of a single film layer of the black matrix layer. Figure 2C for Figure 2A A schematic diagram of a single-layer optical structure in the present invention. This embodiment provides a color filter substrate, comprising:

[0052] Substrate 11;

[0053] A black matrix layer 12 is located on one side of the substrate 11; exemplarily, the black matrix layer 12 includes: a light-shielding portion 121 and a plurality of openings 122;

[0054] The first optical structure layer 13 is located between the substrate 11 and the black matrix layer 12. The first optical structure layer 13 includes a plurality of first optical structures 130.

[0055] The second optical structure layer 14 covers the side of the first optical structure layer 13 facing away from the substrate 11, and the refractive index of the second optical structure layer 14 is lower than that of the first optical structure 130. The first optical structure layer 13 and the second optical structure layer 14 are configured to improve the transmittance of the array substrate.

[0056] In this embodiment, by providing a first optical structure layer 13 and a second optical structure layer 14 on the color filter substrate, wherein the refractive index of the second optical structure layer 14 is lower than that of the first optical structure layer 130, the first optical structure layer 13 and the second optical structure layer 14 are configured to improve the transmittance of the array substrate, so that some light rays other than those directly opposite the opening of the black matrix layer can bypass the light-shielding part of the matrix layer and be emitted, so that some light blocked by the light-shielding part of the black matrix layer can also be used for display, thereby making full use of the backlight and improving the brightness of the display panel. The improvement of the brightness of the display panel can reduce the power consumption of the display panel.

[0057] For example, the refractive index of the first optical structure 130 ranges from 1.6 to 2.0; the refractive index of the second optical structure layer 14 ranges from 1.3 to 1.5. This allows for a large refractive index difference between the first optical structure 130 and the second optical structure layer 14, which is beneficial for efficient light emission. For example, the material of the first optical structure 130 may include resin. For example, the material of the second optical structure layer 14 may include resin. For example, the material of the first optical structure 130 may be different from the material of the second optical structure layer 14.

[0058] For example, the thickness of the first optical structure 130 in the direction perpendicular to the substrate 11 can range from 1.5 μm to 5 μm. For example, the thickness of the second optical structure 14 in the direction perpendicular to the substrate 11 can range from 2 μm to 40 μm.

[0059] In one possible implementation, see Figure 1 , Figures 2A-2C As shown, the orthographic projection of the first optical structure 130 onto the substrate 11 overlaps with the orthographic projection of the opening 122 onto the substrate 11. Exemplarily, the orthographic projection of the first optical structure 130 onto the substrate 11 can cover the orthographic projection of the opening 122 onto the substrate 11. Exemplarily, the first optical structure 130 can correspond one-to-one with the opening 122. Thus, by providing the first optical structure 130 for each opening 122, the light output at each opening 122 can be increased, thereby significantly improving the transmittance of the color filter substrate.

[0060] In one possible implementation, see Figure 1 , Figures 2A-2C As shown, the central region O1 of the first optical structure 130 projected onto the substrate 11 coincides with the central region O2 of the opening 122 projected onto the substrate 11; and the peripheral region of the first optical structure 130 projected onto the substrate 11 overlaps with the projection of the light-shielding portion 121 onto the substrate 11. That is, the central region of the first optical structure 130 coincides with the opening 122, and the peripheral region of the first optical structure 130 is located outside the opening 122, overlapping with the light-shielding portion 121 around the opening 122, so as to achieve complete coverage of the opening 122.

[0061] In one possible implementation, see Figure 1 , Figures 2A-2C As shown, the black matrix layer 12 includes: a plurality of opening rows 1220 extending along a first direction X and arranged along a second direction Y; the opening rows 1220 include a plurality of openings 122; in the direction from the substrate 11 to the first optical structure 130 (i.e., the third direction Z), the width d0 of the first optical structure 130 in the first direction X and / or the second direction Y tends to decrease. In this way, the side of the first optical structure 130 can have a certain tilt angle, which is beneficial for light to be emitted from more angles, thereby improving the transmittance of the color filter substrate.

[0062] In one possible implementation, see Figures 2A-2C , Figure 3 , Figure 4 As shown, where, Figure 3 for Figure 1 Another diagram has been added to indicate this. Figure 4 for Figure 2AA cross-sectional schematic diagram along the dashed line BB' shows that the first optical structure 130 has a trapezoidal cross-sectional shape perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y. The first optical structure 130 has a first surface S1 facing away from the substrate 11. The width a1 of the first surface S1 in the first direction X is less than the width c1 of the opening 122 in the first direction X; and / or, the width a2 of the first surface S1 in the second direction Y is less than the width c2 of the opening 122 in the second direction Y. That is, the orthographic projection of the opening 122 onto the substrate 11 covers the orthographic projection of the first surface S1 onto the substrate 11, i.e., the orthographic projection of the first surface S1 onto the substrate 11 is located within the orthographic projection of the opening 122 onto the substrate 11.

[0063] In one possible implementation, see Figures 2A-2C , Figure 3 , Figure 4 As shown, the first optical structure 130 has a second surface S2 facing the substrate 11; the width d1 of the second surface S2 in the first direction X is greater than the width c1 of the opening 122 in the first direction X; and / or, the width of the second surface S2 in the second direction Y is greater than the width c2 of the opening 122 in the second direction Y. That is, the orthographic projection of the second surface S2 onto the substrate 11 covers the orthographic projection of the opening 122 onto the substrate 11, that is, the orthographic projection of the opening 122 onto the substrate 11 is located within the orthographic projection of the second surface S2 onto the substrate 11. In this embodiment, the orthographic projection of the first surface S1 (top surface) of the first optical structure 130 is located within the orthographic projection of the opening 122, and a portion of the second surface S2 (bottom surface) of the first optical structure 130 is located outside the opening 122, thereby enabling at least a portion of the side surface of the first optical structure 130 to be located in the area where the opening 122 is located, which is beneficial for more light to exit from the opening 122 through the side surface, thereby improving the transmittance of the color filter substrate.

[0064] For example, d1 = c1 + c3 / 2; d2 = c2 + c4 / 2. For example, the display panel may have multiple sub-pixels; the width of the sub-pixel in the first direction X may be c1 + c3 / 2, and the width of the sub-pixel in the second direction Y may be c2 + c4 / 2. That is, the width d1 of the second surface S2 in the first direction X may be equal to the width of the sub-pixel in the first direction X, and the width d2 of the second surface S2 in the second direction Y may be equal to the width of the sub-pixel in the second direction Y.

[0065] In one possible implementation, see Figures 2A-2C , Figure 3 , Figure 4As shown, the first optical structure 130 has a side surface S3 connecting the first surface S1 and the second surface S2; the light-shielding part 12 includes: a first light-shielding part 1211; the orthographic projection of the side surface S3 on the substrate 11 covers the orthographic projection of the first light-shielding part 1211 on the substrate 11; for example, the orthographic projection of the first light-shielding part 1211 on the substrate 11 overlaps with the orthographic projection of the first optical structure 130 on the substrate 11, that is, the part of the light-shielding part 12 that overlaps with the orthographic projection of the first optical structure 130 can be used as the first light-shielding part 1211;

[0066] See Figures 2A-2C As shown, the maximum width b1 of the side surface S3 in the first direction X is greater than the width c3 of the first light-shielding portion 1211 in the first direction X; and / or, the maximum width b2 of the side surface S3 in the second direction Y is greater than the width c4 of the first light-shielding portion 1211 in the second direction Y. Thus, at least a portion of the side surface of the first optical structure 130 is located in the region where the opening 122 is located, which facilitates more light to exit from the opening 122 through the side surface, thereby improving the transmittance of the color filter substrate.

[0067] In one possible implementation, see Figures 2A-2C , Figure 3 , Figure 4 As shown, the width c2 of the opening 122 in the second direction Y is greater than the width c1 in the first direction X; the cross-sectional shape of the first optical structure 130 perpendicular to the substrate 11 and parallel to the first direction X is a first trapezoid W1, and the first trapezoid W1 has a first base angle α1; the cross-sectional shape of the first optical structure 130 perpendicular to the substrate 11 and parallel to the second direction Y is a second trapezoid W2, and the second trapezoid W2 has a second base angle α2; the second base angle α2 is greater than the first base angle α1. In this embodiment, when the width c2 of the opening 122 in the second direction Y is greater than the width c1 in the first direction X, the second base angle α2 of the second trapezoid W2 in the second direction Y is made greater than the first base angle α1 of the first trapezoid W1 in the first direction X, so as to match the width of the light-shielding part 121 in different directions, so that the side of the first optical structure 130 can cover part of the opening 122 in different directions, so that more light can be emitted in different directions, thereby improving the transmittance of the color filter substrate.

[0068] For example, the range of the first base angle α1 can be 35° to 45°. For example, the range of the first base angle α1 can be 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, or 45°. For example, the range of the second base angle α2 can be 45° to 55°. For example, the range of the second base angle α2 can be 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, or 55°.

[0069] In some embodiments, the second base angle α2 may also be equal to the first base angle α1. In this way, different sides of the first optical structure 130 can be fabricated simultaneously using a single mask process.

[0070] In one possible implementation, see Figure 5 As shown, the first optical structure 130 has a convex surface protruding towards the black matrix layer 12 in a cross-sectional shape perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y. In this embodiment, the convex surface protruding towards the black matrix layer 12 in a cross-sectional shape perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y can also improve the brightness of the display panel.

[0071] In one possible implementation, see Figure 6 As shown, the first optical structure 130 has a concave surface recessed towards the substrate 11 in a cross-sectional shape perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y. In this embodiment, the concave surface recessed towards the substrate 11 in a cross-sectional shape of the first optical structure 130 perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y can also improve the brightness of the display panel.

[0072] In one possible implementation, see Figure 7 As shown, the cross-sectional shape of the first optical structure 130 perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y is triangular. In this embodiment, the triangular cross-sectional shape of the first optical structure 130 perpendicular to the substrate 11 and parallel to the first direction X and / or the second direction Y can also improve the brightness of the display panel.

[0073] It is understood that the above is an illustrative description using the example of forming a first optical structure 130 on one side of the substrate 11. In some embodiments, the first optical structure 130 can also be formed by etching the substrate 11 to form multiple recesses and filling the recesses with a high refractive index material. That is, for example, see [link to relevant documentation]. Figure 8 As shown, the substrate 11 has a plurality of recesses P on the side facing the black matrix layer 12, and the first optical structure 130 is located within the recesses P. Exemplarily, as... Figure 8 As shown, the recess P can be an inverted trapezoid. For example, see [link to example]. Figure 9 As shown, the concave P can also be a triangle.

[0074] In some embodiments, see Figure 8 or Figure 9As shown, when the first optical structure 130 is formed by filling the depression P with a high refractive index material, in order to achieve complete filling of the depression P, a supplementary layer 133 can be formed above the depression P. The material of the supplementary layer 133 can be the same as the material of the first optical structure 130.

[0075] In one possible implementation, the first optical structure 130 can also be replaced by a microstructure with scattering capabilities, for example, see [link to relevant documentation]. Figure 10 As shown, the first optical structure 130 includes a scattering body 131 and scattering particles 132 distributed within the scattering body 131; the refractive index of the scattering particles 132 is different from that of the scattering body 131. The orthographic projection of the first optical structure 130 onto the substrate 11 overlaps with the orthographic projection of the light-shielding part 121 onto the substrate 11. In this embodiment, the first optical structure 130 includes a scattering body 131 and scattering particles 132 distributed within the scattering body 131. Through the scattering effect of the scattering particles 132, some light rays other than those directly opposite the opening of the black matrix layer can bypass the light-shielding part of the matrix layer and be emitted, thereby making full use of the backlight and improving the brightness of the display panel.

[0076] For example, the difference between the refractive index of the scattering particle 132 and the refractive index of the scattering body 131 can be 0.2 to 0.8. For example, the difference between the refractive index of the scattering particle 132 and the refractive index of the scattering body 131 can be 0.5 to 0.8. In this way, a larger refractive index difference is achieved between the two, thereby greatly improving the brightness of the display panel.

[0077] Based on the same inventive concept, this application also provides a display panel, which includes an array substrate 2 and a color filter substrate 1 as provided in this application embodiment.

[0078] Based on the same inventive concept, embodiments of this application also provide a display device, which includes a display panel as provided in embodiments of this application.

[0079] In one possible implementation, see Figure 11 As shown, the display device further includes a backlight module 4; the backlight module 4 is located on the side of the color filter substrate 1 away from the array substrate 2, and the backlight module 4 is located on the side of the substrate 11 away from the first optical structure layer 13. In this embodiment, the backlight module 4 is located on the side of the color filter substrate 1 away from the array substrate 2, that is, the light emitted from the backlight module 4 first passes through the color filter substrate 1, and then passes through the array substrate 2. In this way, the light from the backlight module 4 is first modulated by the first optical structure 130 on the color filter substrate 1, and then enters the other layers of the display panel, so that the light that was originally blocked can bypass the light-blocking parts such as the light-blocking black matrix layer, the gate layer metal, and the source layer metal, and be emitted from the array substrate side, thereby improving the brightness of the liquid crystal display panel.

[0080] For example, see Figure 11 As shown, the color filter substrate 1 may further include: a first planarization layer 11 located on the side of the black matrix layer 12 facing away from the substrate 11, and a first alignment film layer 15 located on the side of the first planarization layer 11 facing away from the substrate 11. For example, the first planarization layer 11 may be a low refractive index layer.

[0081] For example, see Figure 11 As shown, the color filter substrate 2 may include: an array substrate 21, a buffer layer 22 located on the side of the array substrate 21 facing the color filter substrate 1, a gate line layer 23 located on the side of the buffer layer 22 facing the color filter substrate 1, an insulating layer 24 located on the side of the gate line layer 23 facing the color filter substrate 1, a data line layer 25 located on the side of the insulating layer 24 facing the color filter substrate 1, a second planarization layer 26 located on the side of the data line layer 25 facing the color filter substrate 1, and a second alignment layer 27 located on the side of the second planarization layer 26 facing the color filter substrate 1.

[0082] For example, see Figure 11 As shown, the display panel may also include a liquid crystal layer 3 located between the color filter substrate 1 and the opposing substrate 2.

[0083] For example, the color filter substrate 1 may also have a color filter layer (not shown) on the side of the black matrix layer 12 away from the substrate 11. The color filter layer may include a variety of color filters with different light emission colors. For example, it may include a red color filter that transmits red light, a green color filter that transmits green light, and a blue color filter that transmits blue light.

[0084] It is understandable that the above is a schematic diagram illustrating the structure of the display panel and display device, using the trapezoidal cross-sectional shape of the first optical structure 130 as an example. Figures 5-10 The first optical structure 130 shown is an embodiment of a display panel and display device in other shapes, which can be referred to. Figure 11 As shown, the implementation of this application will not be described in detail here.

[0085] In some embodiments, see Figure 12 As shown, the first optical structure layer 13 and the second optical structure layer 14 can also be fabricated on the array substrate. For example, the first optical structure layer 13 can be located between the array substrate 21 and the buffer layer 22. The second optical structure layer 14 can be located between the first optical structure layer 13 and the buffer layer 22.

[0086] When the first optical structure 130 is located on the color filter substrate 1 or on the array substrate 2, the backlight module 4 can be disposed on the side closer to the first optical structure 130. That is, when the first optical structure 130 is located on the array substrate 2, the backlight module 4 can be located on the side of the array substrate 2 away from the color filter substrate 1. In this way, the array substrate 1 is closer to the backlight module 4, meaning that the light from the backlight module 4 is first modulated by the first optical structure 130 of the array substrate 2, and then passes through the color filter substrate. In this way, the part of the light that is blocked can also be used for display.

[0087] In some embodiments, when forming the first optical structure layer 13 and the second optical structure layer 14, a non-photosensitive high-refractive-index material can be used and dry etching can be employed. Figure 13 As shown, the process may include: aligning the mask for forming the first optical structure 130; then, coating a precursor film layer for forming the first optical structure 130; then, soft baking the coated precursor film layer; then, post-baking the coated precursor film layer to form a precursor film layer having a first film thickness, for example, the first film thickness may be 4 μm; then, coating a photoresist layer; then, patterning the photoresist layer under the cover of the mask; then, dry etching the precursor film layer; then, stripping away excess photoresist layer; then, coating a precursor film layer for the second optical structure layer; then, soft baking the precursor film layer for the second optical structure layer; then, post-baking the precursor film layer for the second optical structure layer to form a second optical structure layer having a second film thickness, for example, the second film thickness may be 30 μm.

[0088] In some embodiments, when forming the first optical structure layer 13 and the second optical structure layer 14, a photosensitive high-refractive-index material can be used and an imprinting process can be employed, combined with... Figure 14 As shown, the process may include: aligning the mask for forming the first optical structure 130; then, coating a precursor film layer for forming the first optical structure 130; then, soft baking the coated precursor film layer; then, laminating; then, ultraviolet light exposure for shaping; then, post-baking the coated precursor film layer; then, coating a precursor film layer for the second optical structure layer; then, soft baking the precursor film layer for the second optical structure layer; then, post-baking the precursor film layer for the second optical structure layer to form a second optical structure layer having a second film thickness, for example, the second film thickness may be 30 μm.

[0089] In this embodiment, when collimated backlighting is used as the backlight source, the transmittance of the display panel with the first and second optical structural layers can be increased by 35% compared to the transmittance of a display panel without the first and second optical structural layers. When ordinary non-collimated backlighting is used as the backlight source, the transmittance of the display panel with the first and second optical structural layers can be increased by 14% compared to the transmittance of a display panel without the first and second optical structural layers.

[0090] In specific implementations, in the embodiments of this disclosure, the display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of the display device are those that should be understood by those skilled in the art, and will not be described in detail here, nor should they be construed as limiting this disclosure.

[0091] Although preferred embodiments of this disclosure have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this disclosure.

[0092] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A color filter substrate, wherein, include: Substrate; A black matrix layer is located on one side of the substrate; A first optical structure layer is located between the substrate and the black matrix layer, and the first optical structure layer includes: a plurality of first optical structures; A second optical structure layer covers the side of the first optical structure layer that is away from the substrate, and the refractive index of the second optical structure layer is lower than that of the first optical structure layer.

2. The color filter substrate of claim 1, wherein, The black matrix layer includes: a light-shielding portion and a plurality of openings; the orthographic projection of the first optical structure on the substrate overlaps with the orthographic projection of the openings on the substrate.

3. The color filter substrate of claim 2, wherein, The first optical structure coincides with the opening in the center region of the orthographic projection of the substrate; and the periphery of the first optical structure overlaps with the light-shielding portion in the orthographic projection of the substrate.

4. The color filter substrate according to claim 2 or 3, wherein The black matrix layer includes: a plurality of open rows extending along a first direction and arranged along a second direction; the open rows include a plurality of the openings; In the direction from the substrate to the first optical structure, the width of the first optical structure tends to decrease in the first direction and / or the second direction.

5. The color filter substrate of claim 4, wherein, The first optical structure has a trapezoidal cross-sectional shape perpendicular to the substrate and parallel to the first direction and / or the second direction; The first optical structure has a first surface facing away from the substrate; the width of the first surface in the first direction is smaller than the width of the opening in the first direction; And / or, the width of the first surface in the second direction is less than the width of the opening in the second direction.

6. The color filter substrate of claim 5, wherein, The first optical structure has a second surface facing the substrate; the width of the second surface in the first direction is greater than the width of the opening in the first direction; And / or, the width of the second surface in the second direction is greater than the width of the opening in the second direction.

7. The color filter substrate of claim 6, wherein, The first optical structure has a side surface connecting the first surface and the second surface; the light-shielding portion includes: a first light-shielding portion; the orthographic projection of the side surface on the substrate covers the orthographic projection of the first light-shielding portion on the substrate; The width of the side in the first direction is greater than the width of the first light-shielding part in the first direction; and / or, the width of the side in the second direction is greater than the width of the first light-shielding part in the second direction.

8. The color filter substrate of claim 5, wherein, The width of the opening in the second direction is greater than its width in the first direction; The first optical structure has a first trapezoidal cross-sectional shape perpendicular to the substrate and parallel to the first direction, and the first trapezoid has a first base angle; the first optical structure has a second trapezoidal cross-sectional shape perpendicular to the substrate and parallel to the second direction, and the second trapezoid has a second base angle; the second base angle is greater than the first base angle.

9. The color filter substrate of claim 4, wherein, The first optical structure has a triangular cross-sectional shape perpendicular to the substrate and parallel to the first direction and / or the second direction, a convex surface protruding towards the black matrix layer, or a concave surface recessed towards the substrate.

10. The color filter substrate of claim 1, wherein, The substrate has multiple recesses on the side facing the black matrix layer, and the first optical structure is located within the recesses.

11. The color filter substrate of claim 1, wherein, The black matrix layer includes: a light-shielding portion and a plurality of openings; the orthographic projection of the first optical structure on the substrate overlaps with the orthographic projection of the light-shielding portion on the substrate.

12. The color filter substrate of claim 11, wherein, The first optical structure includes: a scattering body, and scattering particles distributed within the scattering body; the refractive index of the scattering particles is different from the refractive index of the scattering body.

13. The color filter substrate of claim 1, wherein, The refractive index of the first optical structure ranges from 1.6 to 2.0; the refractive index of the second optical structure layer ranges from 1.3 to 1.

5.

14. A display panel, wherein, It includes an array substrate and a color filter substrate as described in any one of claims 1-13.

15. A display device, wherein, Includes the display panel as described in claim 14.

16. The display device of claim 15, wherein, The display device further includes: a backlight module; The backlight module is located on the side of the color filter substrate away from the array substrate, and the backlight module is located on the side of the substrate away from the first optical structure layer.

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