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

Abstract

The invention discloses a color film substrate, a color film substrate preparation method and a display panel, and belongs to the technical field of display. The color film substrate comprises a substrate body, a plurality of color resistors and a plurality of black matrixes, the color resistors and the black matrixes are arranged on the substrate body, the black matrixes are arranged between the adjacent color resistors, and each black matrix comprises a cavity, a light filtering part and a light reflecting part; the light filtering piece and the light reflecting piece are arranged in the cavity; the color of the light filtering part is consistent with the color of one color resistor adjacent to the black matrix; the light filtering piece is used for filtering ambient light entering the cavity; the light reflecting part is used for reflecting the light filtered by the light filtering part to the color resistor. Therefore, the black matrix has the effect of absorbing ambient light, and meanwhile, the ambient light can be guided to the color resistor of the corresponding color by utilizing the light filtering piece and the light reflecting piece, so that the display effect of the color resistor is improved.

Description

Technical Field

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

[0002] Ambient light has a great impact on the display effect of the display panel. Black matrix is ​​often used to separate the RGB sub-pixels to prevent color crosstalk and light absorption. At present, the traditional black matrix only isolates color crosstalk and light absorption, while part of the ambient light will still be reflected and affect the display effect, and cannot be fully utilized. Summary of the invention

[0003] The embodiments of the present application provide a color film substrate, a method for preparing a color film substrate, and a display panel to solve the technical problem of low ambient light utilization.

[0004] According to a first aspect of an embodiment of the present application, a color film substrate is provided, comprising a substrate, a plurality of color resists and a plurality of black matrices arranged on the substrate, wherein the black matrix is ​​arranged between adjacent color resists, and each of the black matrices comprises: a cavity, a filter and a reflector; the filter and the reflector are arranged in the cavity; the color of the filter is consistent with the color of one of the color resists adjacent to the black matrix; the filter is used for filtering ambient light incident on the cavity; and the reflector is used for reflecting light filtered by the filter to the color resist.

[0005] In a possible implementation manner, an opening is formed on a side wall of the cavity close to the color resist; and the reflective element is used to reflect the light filtered by the filter element to the color resist through the opening.

[0006] In a possible embodiment, the black matrix also includes: a polarizing component; the polarizing component is disposed in the cavity, and the polarizing component is located above the filter, and the filter is located above the reflective element; the ambient light enters from above the cavity and enters the filter after polarization processing based on the polarizing component, and the light emitted by the color resist cannot pass through the polarizing component.

[0007] In one possible embodiment, the polarizing assembly includes: a first polarizer, a magneto-optical crystal and a second polarizer; the first polarizer is located above the magneto-optical crystal, and the magneto-optical crystal is located above the second polarizer; the angle of light after passing through the magneto-optical crystal matches the polarization angle of the second polarizer, and does not match the polarization angle of the first polarizer.

[0008] In a possible implementation, the angle of the light after passing through the magneto-optical crystal matches the polarization angle of the second polarizer, including: the angle of the light after passing through the magneto-optical crystal plus the polarization angle of the first polarizer is equal to the polarization angle of the second polarizer.

[0009] In a possible implementation manner, the first polarizer, the second polarizer, and the filter are arranged in parallel; and the reflector and the filter are arranged at a predetermined angle.

[0010] In a possible implementation manner, a cross section of the black matrix along the incident direction of the ambient light is a trapezoidal structure, and a short bottom side of the trapezoidal structure is located above a long bottom side of the trapezoidal structure.

[0011] According to a second aspect of an embodiment of the present application, a method for preparing a color filter substrate is also provided, for preparing the color filter substrate described in any one of the first aspects above, the method comprising: forming a cavity by pouring; forming a reflective element at the bottom of the cavity by coating; and attaching a filter element to the middle of the cavity.

[0012] In a possible implementation, the method further includes: attaching a second polarizer above the filter in the cavity; arranging a magneto-optical crystal above the second polarizer by coating; and attaching the first polarizer in the cavity above the magneto-optical crystal.

[0013] According to a third aspect of an embodiment of the present application, a display panel is also provided, comprising the color filter substrate, a liquid crystal layer and an array substrate as described in any one of the first aspects above, wherein the color filter substrate is arranged in a mating relationship with the array substrate, and the liquid crystal layer is arranged between the color filter substrate and the array substrate.

[0014] The embodiment of the present application proposes a color filter substrate, a method for preparing a color filter substrate, and a display panel. The color filter substrate includes a substrate, a plurality of color resists and a plurality of black matrices arranged on the substrate. The black matrix is ​​arranged between adjacent color resists, and each black matrix includes: a cavity, a filter and a reflector; the filter and the reflector are arranged in the cavity; the color of the filter is consistent with the color of a color resist adjacent to the black matrix; the filter is used to filter the ambient light entering the cavity; the reflector is used to reflect the light filtered by the filter to the color resist. In this way, on the basis of ensuring the light absorption effect of the black matrix based on the cavity, by arranging the filter and the reflector in the black matrix cavity, the ambient light is effectively converted into the color light required by the adjacent color resist, and reflected and guided into the color resist, so as to make full use of the ambient light to improve the color gamut and purity of the color resist, and further reduce the influence of the reflected ambient light on the display, thereby optimizing the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a structural schematic diagram of a color filter substrate provided in an embodiment of the present application;

[0017] Figure 2 It is a structural schematic diagram of a color filter substrate provided in an embodiment of the present application;

[0018] Figure 3 It is a structural schematic diagram of a color filter substrate provided in an embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of a process for preparing a color film substrate provided in an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0021] Figure 6 It is a structural schematic diagram of a black matrix provided in an embodiment of the present application;

[0022] Figure 7 This is a schematic diagram of an optical path provided in an embodiment of the present application.

[0023] Description of Reference Numerals

[0024] 1. Cavity; 2. Filter; 3. Reflector; 4. Polarizing assembly; 41. First polarizing element; 42. Magneto-optical crystal; 43. Second polarizing element. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] This embodiment provides a color film substrate. Figure 1 Schematic diagram of the structure of a color filter substrate provided in an embodiment of the present application. Figure 1 As shown, the color filter substrate may include: a substrate, a plurality of color resists and a plurality of black matrices arranged on the substrate, wherein the black matrices are arranged between adjacent color resists, and each of the black matrices includes: a cavity 1, a filter element 2 and a reflector 3;

[0028] The filter element 2 and the reflector 3 are arranged in the cavity 1; the color of the filter element 2 is consistent with the color of a color resistor adjacent to the black matrix; the filter element 2 is used to filter the ambient light incident into the cavity 1;

[0029] The reflector 3 is used to reflect the light filtered by the filter 2 to the color resistor.

[0030] In one embodiment, the black matrix may also be called a black matrix, etc., and a material for absorbing light may be coated in the cavity 1 of the black matrix. The cross section of the black matrix may be rectangular, trapezoidal or other shapes, and the cross section here refers to the cross section along the up and down direction.

[0031] In one embodiment, the cross section of the black matrix along the direction of the ambient light incidence is a trapezoidal structure, and the short bottom side of the trapezoidal structure is located above the long bottom side of the trapezoidal structure. The black matrix is ​​arranged between adjacent color resists, which may mean that there is a black matrix between every two adjacent color resists.

[0032] In one embodiment, the black matrix may be disposed adjacent to the color resist, for example, the color resist may be a color resist adjacent to a predetermined side of the black matrix, and the predetermined side may refer to the left side or the right side, etc. The color resist may be a sub-pixel, for example, the color resist may be a red color resist R, a green color resist G, or a blue color resist B, etc., and the color of the color resist may be red, green, or blue.

[0033] In one embodiment, the filter element 2 may be a filter, such as a micro filter, etc. The color of the ambient light after being filtered by the filter element 2 is the color of the filter element 2, that is, for example, when the color of the filter element 2 is red, the light filtered by the filter element 2 is red light, etc. The color of the filter element 2 is consistent with the color of the color resistance corresponding to the black matrix, and the color of the filtered light is consistent with the color of the color resistance.

[0034] In one embodiment, the reflector 3 may be a reflector sheet, such as a micro reflector sheet, etc. The reflector 3 may be disposed below the filter element 2, so that the ambient light entering the cavity 1 is first filtered by the filter sheet and then reflected by the reflector sheet.

[0035] In one embodiment, a reflective sheet may be disposed at the bottom of the cavity 1 , so that light reflected by the reflective sheet may be reflected from the bottom to the bottom of the color resist, thereby enhancing the display color gamut and color purity of the color resist.

[0036] In one embodiment, the filter can be arranged in the middle of the cavity 1, and the filter can be arranged parallel to the bottom surface of the cavity 1. The angle at which the reflector is arranged can be determined according to the position of the incident color resistance required for the reflected light.

[0037] In one embodiment, there are multiple color resists of the same color adjacent to the black matrix. The black matrix may include a filter 2 and multiple reflectors 3, and the multiple reflectors 3 may be used to reflect the light filtered by the filter 2 to the multiple color resists. The number of reflectors 3 may be equal to the number of color resists.

[0038] For example, if there are two red color resists adjacent to the black matrix, there are also two reflective elements 3 , which reflect the light filtered by the filter element 2 to the two red color resists respectively.

[0039] In one embodiment, there are multiple color resists of different colors adjacent to the black matrix. The black matrix may include multiple filters 2 and multiple reflectors 3, and the color of each filter 2 is consistent with the color of a color resist adjacent to the black matrix.

[0040] One reflector 3 may correspond to one filter 2 and one color resistor, and is used to reflect the light filtered by one filter 2 to the color resistor of the same color as the filter 2. Different reflectors 3 correspond to different filters 2 and color resistors. The number of filters 2 may be equal to the number of reflectors 3 and equal to the number of color resistors.

[0041] For example, if the adjacent color resists of the black matrix include one red color resist and one green color resist, the black matrix includes two filters a and b, and two reflectors c and d, the color of filter a is red, and the color of filter b is green. Reflector c can be used to reflect the light filtered by filter a to the red color resist, and reflector d can be used to reflect the light filtered by filter b to the green color resist.

[0042] In this way, on the basis of ensuring the light absorption effect of the black matrix based on the cavity 1, by arranging the filter 2 and the reflector 3 in the black matrix cavity 1, the ambient light is effectively converted into the color light required by the adjacent color resistance, and reflected and guided into the color resistance, thereby making full use of the ambient light to improve the color gamut and purity of the color resistance, and further reducing the impact of the reflected ambient light on the display, thereby optimizing the display effect.

[0043] In one embodiment, an opening is formed on a side wall of the cavity 1 close to the color resist;

[0044] The reflector 3 is used to reflect the light filtered by the filter 2 to the color resistor through the opening.

[0045] In one embodiment, the height of the opening may be consistent with the height of the reflector 3. For example, the angle set based on the reflector 3 may be used to reflect the vertical light filtered by the filter 2 into horizontal light to enter the color resist.

[0046] In one embodiment, the opening may be aligned with the bottom of the color resist, so that light reflected through the opening may enter the bottom of the color resist, thereby enhancing the display color gamut and color purity of the color resist.

[0047] In one embodiment, the opening is disposed on a side wall of the cavity 1 close to the color resist, that is, the color resist is located on a predetermined side of the black matrix, and the opening is opened on the side wall of the cavity 1 on the predetermined side.

[0048] In one embodiment, the size of the opening, such as the opening width, may be related to at least one of the size of the reflector 3 , the distance between the side wall where the opening is located and the color resist, and the brightness of the color resist.

[0049] In this way, by opening the side wall, the reflected color light can enter the color resist better, thereby further improving the color gamut and purity displayed by the color resist and further improving the utilization rate of the ambient light.

[0050] In some embodiments, Figure 2 As shown, the black matrix further includes: a polarizing component 4;

[0051] The polarizing component 4 is disposed in the cavity 1, and the polarizing component 4 is located above the filter 2, and the filter 2 is located above the reflector 3;

[0052] The ambient light is incident from the top of the cavity 1 and is incident on the filter 2 after being polarized by the polarizing component 4 , and the light emitted by the color resist cannot pass through the polarizing component 4 .

[0053] In one embodiment, the polarizing component 4 may include one or more polarizers, and light entering the polarizing component 4 from above may pass through the polarizing component 4 based on polarization processing, while light entering the polarizing component 4 from below cannot pass through the polarizing component 4 based on polarization processing.

[0054] In one embodiment, the polarizing component 4 is located above the optical filter 2 , and the polarizing component 4 and the optical filter 2 are arranged in parallel.

[0055] In one embodiment, the forward and reverse optical paths of the polarizing component 4 are different. The forward direction refers to the direction from top to bottom, and the forward optical path is in a polarized state. The reverse direction refers to the position from bottom to top, and the reverse optical path is in a closed state.

[0056] In one embodiment, light entering the polarizing component 4 from above can pass through the polarizing component 4 based on the forward polarization state, and light entering the polarizing component 4 from below cannot pass through the polarizing component 4 based on the reverse closed state.

[0057] Here, the forward polarization state may be formed based on a combination of forward polarization angles of a plurality of polarizers, and the reverse polarization state may be formed based on a combination of reverse polarization angles of a plurality of polarizers.

[0058] In this way, a unidirectional polarized light path is formed by the polarizing component 4, so that the ambient light is guided to the color resist to a certain extent, and the light emitted by the color resist is prevented from emitting out of the black matrix through the reflective element 3, which affects the display effect.

[0059] In some embodiments, Figure 3 As shown, the polarizing assembly 4 may include: a first polarizing element 41, a magneto-optical crystal 42 and a second polarizing element 43;

[0060] The first polarizer 41 is located above the magneto-optical crystal 42, and the magneto-optical crystal 42 is located above the second polarizer 43; the angle of the light after passing through the magneto-optical crystal 42 matches the polarization angle of the second polarizer 43, and does not match the polarization angle of the first polarizer 41.

[0061] In one embodiment, the polarizing assembly 4 includes a plurality of polarizers including: a first polarizer 41, a magneto-optical crystal 42, and a second polarizer 43. The first polarizer 41 may be a first polarizer, and the second polarizer 43 may be a second polarizer. The magneto-optical crystal 42 may rotate the light incident on the magneto-optical crystal 42 by a certain angle, i.e., an optical rotation angle, through the magnetic field generated inside. The optical rotation angle is positively correlated with the strength of the magnetic field generated inside.

[0062] In one embodiment, the angle of the light after passing through the magneto-optical crystal 42 matches the polarization angle of the second polarizer 43, which means that the light output after being polarized by the first polarizer 41 and the magneto-optical crystal 42 in sequence can completely pass through the second polarizer 43, that is, after the light polarized by the first polarizer 41 is input into the magneto-optical crystal 42, the angle of the light output based on the optical rotation angle and the optical rotation direction is consistent with the polarization angle of the second polarizer 43.

[0063] In one embodiment, for the ambient light incident from the top of the cavity 1, the polarization angle of the first polarizer 41 is 90°, and the output is 90° polarized light. After entering the magneto-optical crystal 42, the optical rotation angle of the magneto-optical crystal 42 can be 45°, and the optical rotation direction can be counterclockwise, then the optical rotation crystal rotates the 90° polarized light counterclockwise by 45°, and outputs 45° polarized light. The polarization angle of the second polarizer 43 is 45°, and the 45° polarized light can completely pass through the second polarizer 43.

[0064] In one embodiment, for the light from the color block entering from the bottom of the cavity 1, the light first passes through the second polarizer 43 with a polarization angle of 45°, and then outputs 45° polarized light. After entering the magneto-optical crystal 42, the 45° polarized light is still rotated 45° counterclockwise, and then 0° polarized light is output. At this time, for the first polarizer 41 with a polarization angle of 90°, the 0° polarized light cannot pass through the first polarizer 41.

[0065] In one embodiment, the angle of the light after passing through the magneto-optical crystal 42 does not match the polarization angle of the first polarizer 41, which may mean that the light output after being polarized by the second polarizer 43 and the magneto-optical crystal 42 in sequence cannot pass through the first polarizer 41, that is, after the light polarized by the second polarizer 43 is input into the magneto-optical crystal 42, the angle of the light output based on the optical rotation angle and the optical rotation direction is inconsistent with the polarization angle of the first polarizer 41.

[0066] In this way, by using a magneto-optical crystal 42 with a fixed rotation angle and rotation direction, two polarizers are used in the forward and reverse optical paths, so that the forward and reverse polarization angle combinations are different, thereby achieving the effect of allowing forward polarized light to pass through while the reverse optical path is closed, thereby preventing the light emitted by the color block from emitting from the black matrix through the reflective element 3, thereby affecting the display effect.

[0067] In one embodiment, the angle of the light after passing through the magneto-optical crystal 42 matches the polarization angle of the second polarizer 43, including:

[0068] The angle of the light after passing through the magneto-optical crystal 42 plus the polarization angle of the first polarizer 41 is equal to the polarization angle of the second polarizer 43 .

[0069] For example, the optical rotation direction of the magneto-optical crystal 42 is consistent with the polarization direction of the second polarizer 43 , and the angle of the light after passing through the magneto-optical crystal 42 plus the polarization angle of the first polarizer 41 is equal to the polarization angle of the second polarizer 43 .

[0070] Here, the angle of the light after passing through the magneto-optical crystal 42 may be the optical rotation angle of the magneto-optical crystal 42. The angle of the light after passing through the magneto-optical crystal 42 matches the polarization angle of the second polarizer 43, including: after the light polarized by the first polarizer 41 is input into the magneto-optical crystal 42, the angle of the light output based on the optical rotation angle and the optical rotation direction is consistent with the polarization angle of the second polarizer 43.

[0071] In one embodiment, the angle of the light after passing through the magneto-optical crystal 42 does not match the polarization angle of the first polarizer 41 , which may mean that the sum of the angle of the light after passing through the magneto-optical crystal 42 and the polarization angle of the second polarizer 43 is not equal to the polarization angle of the first polarizer 41 .

[0072] Here, the optical rotation angle may have positive or negative values. For example, when the optical rotation direction is counterclockwise, the optical rotation angle is a negative value, and when the optical rotation direction is clockwise, the optical rotation angle is a positive value.

[0073] Exemplarily, when the optical rotation angle is 45° and the optical rotation direction is counterclockwise, the polarization angle 90° of the first polarizer 41 and the optical rotation angle add up to 90°+(−45°)=45°.

[0074] In one embodiment, the polarization angle of the first polarizer 41 is 90°, the polarization angle of the second polarizer 43 is 45°, the optical rotation angle of the optical rotation crystal is 45°, and the optical rotation direction is counterclockwise.

[0075] In this way, by coordinating the optical rotation angle and the polarization angle, it is possible to accurately prevent the light from the color block from passing through the first polarizer 41, thereby better improving the display effect.

[0076] In one embodiment, the first polarizer 41 , the second polarizer 43 and the filter 2 are arranged in parallel; the reflector 3 and the filter 2 are arranged at a predetermined angle.

[0077] In one embodiment, the first polarizer 41, the second polarizer 43 and the filter 2 are arranged in parallel and perpendicular to the direction in which the ambient light enters the cavity 1. Here, the direction in which the ambient light enters the cavity 1 is the positive direction, which is from the top to the bottom.

[0078] In one embodiment, the first polarizer 41, the second polarizer 43 and the filter 2 can be arranged parallel to the bottom surface of the cavity 1. The predetermined angle at which the reflector is arranged can be determined according to the position of the incident color resistance required for the reflected light.

[0079] In this way, the parallel polarizing components 4 can receive the ambient light incident into the cavity 1 to the greatest extent, and the angle setting of the reflector 3 can more accurately guide the color light emitted by the filter 2 to the color resistor, thereby improving the light utilization rate.

[0080] In some embodiments, a cross section of the black matrix along the incident direction of the ambient light is a trapezoidal structure, and a short bottom side of the trapezoidal structure is located above a long bottom side of the trapezoidal structure.

[0081] Here, the incident direction of the ambient light may be an up and down direction.

[0082] In one embodiment, the cross-sections of the black matrix and the color resist along the direction of incidence of the ambient light are both trapezoidal structures, and the short bottom side of the trapezoidal structure in the color resist is located below the long bottom side of the trapezoidal structure, so that the arrangement of the color resist and the black matrix can fully utilize the space, and the color resist is wide at the top and narrow at the bottom, which is beneficial to luminous display, and the black matrix is ​​narrow at the top and wide at the bottom, which is beneficial to absorbing ambient light.

[0083] The present application embodiment provides a method for preparing a color film substrate, which is used to prepare the color film substrate described in any one or more of the above embodiments. Figure 4 Schematic diagram of a method for preparing a color filter substrate provided in an embodiment of the present application. Figure 4 As shown, the method may include:

[0084] S10: forming a cavity 1 by pouring;

[0085] S20: forming a reflective element 3 at the bottom of the cavity 1 by coating;

[0086] S30 : attaching the filter element 2 to the middle of the cavity 1 .

[0087] In one embodiment, step S10 may include: manufacturing a mold of the black matrix by injection molding and / or milling and other mold processing methods; and manufacturing a cavity 1 for molding the black matrix in the mold by pouring.

[0088] In one embodiment, step S10 may include: arranging a plurality of color resists on a substrate; and forming a cavity 1 between adjacent color resists by pouring. The cavity 1 is a cavity 1 of a black matrix between adjacent color resists.

[0089] In one embodiment, the size of the black matrix may be determined based on the size of the color resist, for example, may be several microns to tens of microns.

[0090] In one embodiment, step S20 may include: forming a reflective member 3 by coating at a position of the bottom of the cavity 1 away from the predetermined side wall. Here, the predetermined side is a side of the cavity 1 close to the color resist.

[0091] Exemplarily, the position at the bottom of the cavity 1 away from the predetermined side wall may be a bottom angle position at the bottom of the cavity 1 away from the predetermined side wall. The reflector 3 may be fixed at the bottom angle position at a predetermined angle.

[0092] In one embodiment, step S30 may include: using nanomanipulation technology to precisely attach the filter 2 to the middle of the cavity 1. For example, attaching to the middle of the cavity 1 may mean attaching the edges of the filter 2 to the side walls of the middle of the cavity 1.

[0093] Here, the filter element 2 may be parallel to the bottom surface of the cavity 1 , and the reflector 3 may be at a predetermined angle to the bottom surface of the cavity 1 .

[0094] In one embodiment, the distance between the filter 2 and the reflector 3 can be related to a predetermined angle set by the reflector 3. For example, the predetermined angle is the angle formed by the reflector 3 and the horizontal plane or the bottom surface of the cavity 1. The larger the predetermined angle, the smaller the distance can be, thereby improving the utilization rate of the color light output by the filter 2.

[0095] In this way, on the basis of ensuring the light absorption effect of the black matrix based on the cavity 1, by arranging the filter 2 and the reflector 3 in the black matrix cavity 1, the ambient light is effectively converted into the color light required by the adjacent color resistance, and reflected and guided into the color resistance, thereby making full use of the ambient light to improve the color gamut and purity of the color resistance, and further reducing the impact of the reflected ambient light on the display, thereby optimizing the display effect.

[0096] In one embodiment, the method may further include:

[0097] Attaching the second polarizer 43 above the filter 2 in the cavity 1;

[0098] A magneto-optical crystal 42 is arranged above the second polarizer 43 by coating;

[0099] A first polarizer 41 is attached to the cavity 1 above the magneto-optical crystal 42 .

[0100] Here, the above steps may be performed before step S20, before step S30, or after step S30.

[0101] In one embodiment, attaching the second polarizer 43 may include attaching the second polarizer 43 by nano-manipulation technology, and attaching the first polarizer 41 may include attaching the first polarizer 41 by nano-manipulation technology.

[0102] In one embodiment, attaching the second polarizer 43 above the filter 2 in the cavity 1 may include attaching an edge of the second polarizer 43 to a side wall above the filter 2 in the cavity 1 .

[0103] In one embodiment, attaching the first polarizer 41 in the cavity 1 may include: attaching an edge of the first polarizer 41 to a side wall in the cavity 1 .

[0104] In one embodiment, the first polarizer 41 , the second polarizer 43 and the filter 2 may be arranged in parallel.

[0105] In one embodiment, arranging the magneto-optical crystal 42 by coating may include: fixing the magneto-optical crystal 42 on the inner wall of the cavity 1 by coating.

[0106] It should be noted that the relevant meanings, specific implementation methods and relevant examples in the above method embodiments can refer to the relevant contents of the aforementioned color filter substrate embodiment part, which will not be repeated here.

[0107] In this way, by using a magneto-optical crystal 42 with a fixed rotation angle and rotation direction, two polarizers are used in the forward and reverse optical paths, so that the forward and reverse polarization angle combinations are different, thereby achieving the effect of allowing forward polarized light to pass through while the reverse optical path is closed, thereby preventing the light emitted by the color block from emitting from the black matrix through the reflective element 3, thereby affecting the display effect.

[0108] The present application also provides a display device, such as Figure 5 As shown, the display device includes the color filter substrate, liquid crystal layer and array substrate described in any one or more of the aforementioned embodiments, the color filter substrate and the array substrate are arranged in alignment, and the liquid crystal layer is arranged between the color filter substrate and the array substrate.

[0109] Here, the display device may be a display panel, a display array, a display module, etc.

[0110] In one embodiment, the array substrate comprises: an alignment film layer and a substrate, wherein the alignment film may include pixel electrodes. The alignment film layer in the array substrate is located between the substrate and the liquid crystal layer.

[0111] In one embodiment, the color filter substrate may further include: an alignment film layer and a common electrode layer. The common electrode layer is located between the alignment film layer and the black matrix in the color filter substrate.

[0112] In one embodiment, a black matrix is ​​disposed between every two adjacent color resists.

[0113] As a possible implementation, a black matrix is ​​provided, such as Figure 6 As shown, the black matrix is ​​a cavity structure, and the internal structure is composed of a micro reflector, a micro filter, a second polarizer, a magneto-optical crystal, and a first polarizer in sequence; the specific working process is that when ambient light enters the black matrix through the display panel substrate, when ambient light enters the first polarizer (assuming that the transmission axis angle, i.e., the polarization angle, is 90°), the light is transmitted at 90° and reaches the magneto-optical crystal cavity, the magneto-optical crystal generates a magnetic field so that the linear polarized light transmitted through the first polarizer at 90° rotates counterclockwise by 45° (the optical rotation angle is proportional to the magnitude of the magnetic field, assuming a rotation of 45°), the rotated 45° linear polarized light reaches the second polarizer (assuming that the transmission axis angle is 45°), the 45° linear polarized light is consistent with the transmission axis direction of the second polarizer, the light passes through the second polarizer, the light reaches the micro filter, the color light is projected through the micro filter, and the light is reflected by the micro reflector into the corresponding sub-pixel; due to the action of the first polarizer, the magneto-optical crystal, and the second polarizer, the light emitted by the sub-pixel cannot be reflected, as shown in FIG. Figure 7 shown.

[0114] In this embodiment, the preparation process of the black matrix specifically includes the following steps:

[0115] The mold of the black matrix is ​​made by injection molding, milling and other mold processing methods; the black matrix cavity is formed by pouring. The size of the black matrix generally depends on the specific application and needs to match the sub-pixel, usually a few microns to tens of microns; a micro reflector is coated on the bottom of the black matrix cavity; the micro filter is accurately attached to the middle of the cavity through nano-control technology; the first and second polarizers are attached in the same way, and the magneto-optical crystal can be plated to the inner wall of the cavity through coating technology; according to the principle of magneto-optical effect, the linearly polarized light passing through the first polarizer rotates through the magnetic field, and the angle of the second polarizer should be consistent with the optical rotation angle of the magneto-optical crystal, so that the light passes through.

[0116] The calculation method of the optical rotation angle of the magneto-optical crystal is: θ=VBL.

[0117] Where: θ is the optical rotation angle; L is the distance that light passes through the magneto-optical crystal (several microns to tens of microns); B is the magnetic flux density component parallel to the direction of light propagation (the magnetic flux density is set to a constant value, and its optical rotation angle is also a constant value); V is called the Verdet constant. The specific optical rotation angle only needs to be consistent with the angle of the second polarizer and cannot coincide with the transmission axis of the first polarizer.

[0118] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0119] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

[0120] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A color filter substrate, comprising a substrate, a plurality of color resists and a plurality of black matrices arranged on the substrate, wherein the black matrices are arranged between adjacent color resists, characterized in that: Each of the black matrices comprises: a cavity, a filter element and a reflective element; The filter and the reflector are arranged in the cavity; the color of the filter is consistent with the color of one of the color resistors adjacent to the black matrix; the filter is used to filter the ambient light incident into the cavity; The reflective element is used to reflect the light filtered by the filter element to the color resistor.

2. The color film substrate according to claim 1, characterized in that: An opening is formed on a side wall of the cavity close to the color resist; The reflective element is used to reflect the light filtered by the filter element to the color resist through the opening.

3. The color film substrate according to claim 1 or 2, characterized in that: The black matrix also includes: a polarizing component; The polarizing component is disposed in the cavity, and the polarizing component is located above the filter, and the filter is located above the reflective element; The ambient light is incident from the top of the cavity and is incident on the filter after polarization processing based on the polarizing component, and the light emitted by the color resist cannot pass through the polarizing component.

4. The color film substrate according to claim 3, characterized in that: The polarizing assembly comprises: a first polarizing element, a magneto-optical crystal and a second polarizing element; The first polarizer is located above the magneto-optical crystal, and the magneto-optical crystal is located above the second polarizer; the angle of light after passing through the magneto-optical crystal matches the polarization angle of the second polarizer, and does not match the polarization angle of the first polarizer.

5. The color film substrate according to claim 4, characterized in that: The angle of the light after passing through the magneto-optical crystal matches the polarization angle of the second polarizer, including: The angle of the light after passing through the magneto-optical crystal plus the polarization angle of the first polarizer is equal to the polarization angle of the second polarizer.

6. The color film substrate according to claim 4, characterized in that: The first polarizer, the second polarizer and the filter are arranged in parallel; the reflector and the filter are arranged at a predetermined angle.

7. The color film substrate according to claim 1, characterized in that: The cross section of the black matrix along the incident direction of the ambient light is a trapezoidal structure, and the short bottom side of the trapezoidal structure is located above the long bottom side of the trapezoidal structure.

8. A method for preparing a color film substrate, used for preparing the color film substrate according to any one of claims 1 to 7, characterized in that: The method comprises: Forming the cavity by pouring; A reflective element is formed at the bottom of the cavity by coating; The filter is attached to the middle part of the cavity.

9. The method for preparing a color film substrate according to claim 8, characterized in that: The method further comprises: Attaching a second polarizer above the filter in the cavity; Arranging a magneto-optical crystal above the second polarizer by coating; A first polarizer is attached in the cavity above the magneto-optical crystal.

10. A display panel, characterized in that: The display panel comprises: the color filter substrate according to any one of claims 1 to 7, a liquid crystal layer and an array substrate, the color filter substrate and the array substrate are arranged in alignment, and the liquid crystal layer is arranged between the color filter substrate and the array substrate.

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