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

Abstract

The application discloses a color film substrate, a preparation method of the color film substrate and a display panel, and belongs to the technical field of display. The color film substrate comprises a substrate, a plurality of color resist arranged on the substrate and a plurality of black matrices arranged between adjacent color resist. Each black matrix 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 color resist adjacent to the black matrix. The filter is used for filtering ambient light entering the cavity. The reflector is used for reflecting the light filtered by the filter to the color resist. In this way, the black matrix can absorb ambient light, and the filter and the reflector can guide ambient light to the color resist of the corresponding color, thereby improving the display effect of the color resist.

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 significantly impacts the display quality of a display panel. A black matrix is ​​often used to separate the RGB sub-pixels to prevent color crosstalk and light absorption. Currently, traditional black matrices only block color crosstalk and light absorption, but some ambient light is still reflected, affecting the display quality and failing to be fully utilized. Summary of the Invention

[0003] The embodiments of the present application provide a color filter substrate, a method for preparing the color filter 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 arranged on the substrate, and a plurality of black matrices, wherein the black matrices are arranged between adjacent color resists, and each black matrix 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 to filter ambient light incident on the cavity; and the reflector is used to reflect the light filtered by the filter to the color resist.

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

[0006] In one possible embodiment, the black matrix further 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 reflector; 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 one possible embodiment, 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, 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, a cross section of the black matrix along the incident direction of the ambient light is a trapezoidal structure, and a short base side of the trapezoidal structure is located above a long base side of the trapezoidal structure.

[0011] According to a second aspect of an embodiment of the present application, a method for preparing a color film substrate is also provided, for preparing the color film 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 one possible embodiment, 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, liquid crystal layer and array substrate described in any one of the first aspects above, wherein 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.

[0014] The embodiments of the present application provide 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 arranged on the substrate, and a plurality of black matrices. The black matrices are arranged between adjacent color resists. 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 ambient light entering the cavity. The reflector is used to reflect the light filtered by the filter to the color resist. In this way, based on the light absorption effect of the black matrix ensured by 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, thereby making full use of the ambient light to improve the color gamut and purity of the color resist, and further reducing the impact 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 This is a schematic structural diagram of a color filter substrate provided in an embodiment of the present application;

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

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

[0019] Figure 4 This is a schematic flow chart of a method for preparing a color filter substrate provided in an embodiment of the present application;

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

[0021] Figure 6 Schematic diagram of the structure of a black matrix provided in an embodiment of the present application;

[0022] Figure 7 This is a light path schematic diagram 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 polarizer; 42. Magneto-optical crystal; 43. Second polarizer. 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 this field without making creative work should fall within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0026] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application and the above-mentioned accompanying 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 interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] The present embodiment provides a color film substrate, Figure 1 is a structural schematic diagram of a color film substrate provided by the present embodiment. As shown in the figure, Figure 1 The color film substrate can include a substrate, a plurality of color resist and a plurality of black matrix disposed on the substrate, the black matrix is disposed between adjacent color resist, each of the black matrix includes a cavity 1, a filter 2 and a reflector 3.

[0028] The filter 2 and the reflector 3 are disposed in the cavity 1; the color of the filter 2 is consistent with the color of one color resist adjacent to the black matrix; the filter 2 is used to filter the ambient light entering the cavity 1;

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

[0030] In one embodiment, the black matrix can also be referred to as a black matrix, etc., and the cavity 1 of the black matrix can be coated with a material for light absorption. The cross section of the black matrix can be rectangular, trapezoidal or other shapes, where the cross section refers to the cross section in the up-down direction.

[0031] In one embodiment, the cross section of the black matrix along the direction of the ambient light entering is a trapezoidal structure, and the short bottom of the trapezoidal structure is located above the long bottom of the trapezoidal structure. The black matrix is disposed between adjacent color resist, which can mean that there is a black matrix between every two adjacent color resist.

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

[0033] In one embodiment, the filter element 2 may be a filter, such as a microfilter. The color of the ambient light after being filtered by the filter element 2 is the color of the filter element 2. For example, if the color of the filter element 2 is red, the light filtered by the filter element 2 is red. If the color of the filter element 2 is consistent with the color of the color resist corresponding to the black matrix, the color of the filtered light is consistent with the color of the color resist.

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

[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 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, the black matrix has multiple adjacent color resists of the same color. The black matrix may include a filter 2 and multiple reflectors 3. The multiple reflectors 3 may be used to reflect light filtered by the filter 2 onto 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] Each reflector 3 can correspond to one filter 2 and one color resist, and is used to reflect the light filtered by the filter 2 to the color resist of the same color as the filter 2. Different reflectors 3 correspond to different filters 2 and color resists. The number of filters 2 can be equal to the number of reflectors 3 and the number of color resists.

[0041] For example, if the adjacent color resists in the black matrix include one red color resist and one green color resist, the black matrix will contain two filters, a and b, and two reflectors, c and d. Filter a is red, and filter b is green. Reflector c can be used to reflect light filtered by filter a onto the red color resist, and reflector d can be used to reflect light filtered by filter b onto 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 reflective element 3 is used to reflect the light filtered by the filter element 2 to the color resist through the opening.

[0045] In one embodiment, the height of the opening can be consistent with the height of the reflector 3. For example, the angle of the reflector 3 can 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 provided on the sidewall 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 provided on the sidewall of the cavity 1 on the predetermined side.

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

[0049] In this way, by providing openings on the sidewalls, the reflected color light can better enter the color resist, thereby further improving the color gamut and purity displayed by the color resist and further increasing the utilization rate of ambient light.

[0050] In some embodiments, as 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 above 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 assembly 4 from above can pass through the polarizing assembly 4 based on the forward polarization state, and light entering the polarizing assembly 4 from below cannot pass through the polarizing assembly 4 based on the reverse blocking 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 element 4, thereby guiding the ambient light to the color resist to a certain extent, and preventing the light emitted by the color resist from emitting out of the black matrix through the reflective element 3, thereby affecting the display effect.

[0059] In some embodiments, as Figure 3 As shown, the polarizing assembly 4 may include: a first polarizer 41, a magneto-optical crystal 42 and a second polarizer 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 multiple 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 generates an internal magnetic field that rotates light incident on it by a certain angle, i.e., an optical rotation angle. The optical rotation angle is positively correlated with the strength of the internal magnetic field.

[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 may mean 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 optical rotation direction is consistent with the polarization angle of the second polarizer 43.

[0063] In one embodiment, ambient light incident from above cavity 1 is first polarized at a 90° angle by first polarizer 41, outputting 90° polarized light. After entering magneto-optical crystal 42, the magneto-optical crystal 42 may have an optical rotation angle of 45° and a counterclockwise rotation direction. The magneto-optical crystal then rotates the 90° polarized light counterclockwise by 45°, outputting 45° polarized light. The second polarizer 43 has a 45° polarization angle, allowing the 45° polarized light to completely pass through the second polarizer 43.

[0064] In one embodiment, light from the color filter entering from the bottom of the cavity 1 first passes through the second polarizer 43, where the polarization angle is set to 45°, and then outputs 45° polarized light. After entering the magneto-optical crystal 42, the 45° polarized light is rotated 45° counterclockwise, resulting in 0° polarized light. At this point, the 0° polarized light cannot pass through the first polarizer 41, which has a polarization angle of 90°.

[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 combined in the forward and reverse optical paths, so that the forward and reverse polarization angle combinations are different, achieving the effect of allowing polarized light to pass through while the reverse optical path is closed, and preventing the light emitted by the color block from being emitted 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] For example, when the optical rotation angle is 45° and the optical rotation direction is counterclockwise, the polarization angle of 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, the light from the color filter can be accurately prevented 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 of the ambient light entering the cavity 1. Here, the direction of the ambient light entering the cavity 1 is the forward direction, 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 of the reflector 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 block, thereby improving light utilization.

[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, thereby enabling the color resist and the black matrix to be arranged to fully utilize the space, and the color resist is wide at the top and narrow at the bottom, which is beneficial for luminous display, and the black matrix is ​​narrow at the top and wide at the bottom, which is beneficial for absorbing ambient light.

[0083] The present application 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 This is a flow chart 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 2 to the middle of the cavity 1 .

[0087] In one embodiment, step S10 may include: manufacturing a black matrix mold by injection molding and / or milling, 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 element 3 by coating at a position at the bottom of the cavity 1 away from a predetermined side wall. Here, the predetermined side is a side of the cavity 1 close to the color resist.

[0091] For example, the position at the bottom of the cavity 1 away from the predetermined side wall may be a bottom corner position at the bottom of the cavity 1 away from the predetermined side wall. The reflector 3 may be fixed at the bottom corner 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 both sidewalls of the middle of the cavity 1.

[0093] Here, the filter element 2 may be parallel to the bottom surface of the cavity 1. 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 based on 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 can be performed before step S20, before step S30, or after step S30.

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

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

[0103] In one embodiment, attaching the first polarizer 41 in the cavity 1 can include attaching an edge of the first polarizer 41 to a sidewall in the cavity 1.

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

[0105] In one embodiment, arranging the magneto-optical crystal 42 by plating can include fixing the magneto-optical crystal 42 to an inner wall of the cavity 1 by plating.

[0106] It should be noted that the related meanings, specific implementations, and related embodiments in the above method embodiments can refer to the related content in the foregoing color film substrate embodiments, which will not be described here again.

[0107] In this way, by using the magneto-optical crystal 42 with a fixed rotation angle and rotation direction, and by matching the two polarizers in the forward and reverse light paths, the polarization angle combinations in the forward and reverse directions are different, so that the effect of allowing the forward polarized light to pass through and blocking the reverse light path is achieved, thereby avoiding the light emitted by the color resistance from being emitted out of the black matrix through the reflecting piece 3, and affecting the display effect.

[0108] The present application also provides a display device, as shown in Figure 5 The display device includes the color film substrate, the liquid crystal layer, and the array substrate according to any one or more of the embodiments described above, the color film substrate and the array substrate are arranged in a clamped manner, and the liquid crystal layer is arranged between the color film substrate and the array substrate.

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

[0110] In one embodiment, the array substrate includes an alignment film layer and a substrate, and the pixel electrode can be included in the alignment film. The alignment film layer in the array substrate is located between the substrate and the liquid crystal layer.

[0111] In one embodiment, the color film substrate can 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 film substrate.

[0112] In one embodiment, a black matrix is arranged between every two adjacent color resist.

[0113] As a possible implementation, a black matrix is provided, as shown in Figure 6 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 as follows: when ambient light enters the black matrix through the display panel substrate, when the ambient light enters the first polarizer (assuming that the transmission axis angle, i.e., the polarization angle, is 90°), the light with an angle of 90° transmits through the first polarizer and reaches the magneto-optical crystal cavity. The magneto-optical crystal generates a magnetic field to make the linearly polarized light with an angle of 90° rotate counterclockwise by 45° (the rotation angle is proportional to the magnetic field size, assuming a rotation of 45°). The 45° linearly polarized light reaches the second polarizer (assuming that the transmission axis angle is 45°). The 45° linearly polarized light is consistent with the transmission axis direction of the second polarizer, and the light transmits through the second polarizer. The light reaches the micro filter, projects color light through the micro filter, and reflects into the corresponding sub-pixel through the micro reflector. Due to the effects of the first polarizer, the magneto-optical crystal, and the second polarizer, the light emitted by the sub-pixel is not reflected, as shown in Figure 7 .

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

[0115] A mold for the black matrix is made by mold processing methods such as injection molding and milling. The black matrix cavity is made 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 a few tens of microns. The micro reflector is plated on the bottom of the black matrix cavity. The micro filter is precisely attached to the middle of the cavity by nano control technology. The first and second polarizers are attached in the same way. The magneto-optical crystal can be plated on the inner wall of the cavity by plating technology. According to the principle of magneto-optical effect, the linearly polarized light that transmits through the first polarizer rotates through the magnetic field. The angle of the second polarizer should be consistent with the optical rotation angle of the magneto-optical crystal, and the light transmits through.

[0116] The optical rotation angle of the magneto-optical crystal is calculated as follows: θ = VBL.

[0117] Where θ is the optical rotation angle; L is the distance light travels through the magneto-optical crystal (a few microns to tens of microns); B is the component of the magnetic flux density parallel to the direction of light propagation (if the magnetic flux density is set to a constant value, the 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 overlap with the transmission axis of the first polarizer.

[0118] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention is essentially 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, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or 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 scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the scope of protection of the present application.

[0120] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

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 disposed 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 ambient light incident on the cavity; The reflective element is used to reflect the light filtered by the filter element to the color resist.

2. The color filter substrate according to claim 1, wherein: 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 further 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 above 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, wherein: 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.

5. The color filter 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, comprising: 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, wherein: 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, for preparing the color film substrate according to any one of claims 1 to 7, characterized in that: The method comprises: The cavity is formed by pouring; forming a reflective element at the bottom of the cavity by coating; The filter is attached to the middle portion of the cavity.

9. The method for preparing a color filter substrate according to claim 8, wherein: 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 to 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, wherein the color filter substrate and the array substrate are aligned, and the liquid crystal layer is arranged between the color filter substrate and the array substrate.

Images