CN114690470A - Color filter substrate, manufacturing method thereof and liquid crystal display device - Google Patents
Color filter substrate, manufacturing method thereof and liquid crystal display device Download PDFInfo
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- CN114690470A CN114690470A CN202011584957.7A CN202011584957A CN114690470A CN 114690470 A CN114690470 A CN 114690470A CN 202011584957 A CN202011584957 A CN 202011584957A CN 114690470 A CN114690470 A CN 114690470A
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- filter substrate
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
Abstract
The embodiment of the invention relates to a color filter substrate, a manufacturing method thereof and a liquid crystal display device. The color filter substrate (10) includes: a glass substrate (12); a plurality of color resists (14) distributed on the glass substrate (12) at intervals; and a plurality of light-shielding spacers (16), each of the plurality of light-shielding spacers (16) including a light-shielding portion (18) extending from the glass substrate (12) and a reflective portion (20) extending from the light-shielding portion (18), the light-shielding portions (18) of the plurality of light-shielding spacers (16) contacting and surrounding the plurality of color resists (14). The embodiment of the invention can be beneficial to increasing the emergent angle of the light of the liquid crystal display device, improving the visual angle of the liquid crystal display device, improving the brightness of the liquid crystal display device and the like.
Description
Technical Field
The invention relates to the technical field of display, in particular to a color filter substrate, a manufacturing method thereof and a liquid crystal display device.
Background
For a Display such as a Liquid Crystal Display (LCD) device, a larger viewing angle and higher brightness may better meet the actual use requirements of customers. The viewing angle and brightness of the liquid crystal display device are related to the exit angle of light emitted from a light source in the liquid crystal display device. The structure of the color filter substrate of the liquid crystal display device often affects the outgoing angle of light.
However, the existing color filter substrate and the manufacturing method thereof are not ideal, so that the emergent angle, the visual angle and the brightness of the light of the liquid crystal display device are improved.
Disclosure of Invention
The technical problems solved by the invention include that the emergent angle of the light of the liquid crystal display device is smaller, the visual angle is smaller, the brightness is lower and the like.
An aspect of an embodiment of the present invention relates to a color filter substrate, including: a glass substrate; a plurality of color photoresists, which are distributed on the glass substrate at intervals; and a plurality of light-shielding spacers, each of the plurality of light-shielding spacers including a light-shielding portion extending from the glass substrate and a reflection portion extending from the light-shielding portion, the light-shielding portion of the plurality of light-shielding spacers contacting and surrounding the plurality of color resists.
Optionally, the reflection part includes a main body part and a reflection layer on a surface of the main body part.
Optionally, the reflective layer includes a side reflective layer on a side surface of the main body portion.
Optionally, the reflective layer includes an end reflective layer on an end surface of the body portion.
Optionally, the reflective layer comprises a reflective metal.
Optionally, the reflective layer comprises at least one of silver, aluminum.
Optionally, the main body portion is integrally formed with the light shielding portion.
Optionally, the main body portion and the light shielding portion are made of the same material.
Alternatively, the main body portion and the light shielding portion are made of an acrylic resin material and a carbon black pigment.
Optionally, each of the plurality of color resists comprises a first surface contacting at least one of the plurality of light-shielding spacers and a second surface contacting the glass substrate, and the first surface intersects the second surface at an included angle of 90 degrees or less.
Another aspect of the embodiments of the present invention relates to a liquid crystal display device, which includes the color filter substrate as described above, an array substrate opposite to the color filter substrate, liquid crystal filled between the array substrate and the color filter substrate, and a light source.
Optionally, the array substrate abuts against the plurality of light-shielding spacers.
Optionally, the light source includes a surface light source, and the array substrate is located between the surface light source and the plurality of light-shielding spacers.
Optionally, the reflecting portion is closer to the surface light source than the plurality of color resists.
Optionally, the light source includes a plurality of point light sources, and the array substrate is located between the plurality of light-shielding spacers and the plurality of point light sources.
Optionally, the reflection part is closer to the plurality of point light sources than the plurality of color resists.
Another aspect of the embodiments of the present invention relates to a method for manufacturing a color filter substrate, including the following steps: providing a glass substrate; forming a plurality of color photoresists on the glass substrate at intervals; and forming a plurality of light-shielding spacers, each of the plurality of light-shielding spacers including a light-shielding portion extending from the glass substrate and a reflection portion extending from the light-shielding portion, the light-shielding portion of the plurality of light-shielding spacers contacting and surrounding the plurality of color resists.
Optionally, the forming a plurality of light-shielding spacers, each of the plurality of light-shielding spacers including a light-shielding portion extending from the glass substrate and a reflective portion extending from the light-shielding portion, the step of the plurality of light-shielding spacers contacting and surrounding the plurality of color resists includes forming a main portion of the reflective portion and a reflective layer on a surface of the main portion.
Optionally, the reflective layer comprises a reflective metal.
Optionally, each of the plurality of color resists includes a first surface contacting an adjacent one of the plurality of light-shielding spacers and a second surface contacting the glass substrate, and the first surface intersects the second surface at an included angle of 90 degrees or less.
The technical scheme of the embodiment of the invention can be beneficial to increasing the emergent angle of the light of the liquid crystal display device, improving the visual angle of the liquid crystal display device, improving the brightness of the liquid crystal display device and the like.
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a liquid crystal display device;
FIG. 2 is a schematic front view of a color filter substrate according to an aspect of an embodiment of the invention;
FIG. 3 is a schematic diagram of a liquid crystal display device according to another aspect of the embodiments of the present invention, including the color filter substrate of FIG. 2;
FIG. 4 is a schematic diagram of a liquid crystal display device according to further embodiments of the present invention;
fig. 5 is a schematic flow chart of a method for manufacturing a color filter substrate according to another aspect of the embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of a liquid crystal display device. Referring to fig. 1, light 104 emitted from a light source 102 of a liquid crystal display device 100 is transmitted in a direction indicated by an arrow, and generally needs to pass through at least one of a plurality of color resists 110 of a color filter substrate 106 before being emitted through a glass substrate 108 of the color filter substrate 106.
The plurality of color resists 110 are distributed among a plurality of light-shielding blocks 112 on the glass substrate 108. The light shielding blocks 112 have a high optical density and block the light 120 of the light 104.
Unless otherwise specifically stated, "above" herein does not represent a specific up-down orientation in a color filter substrate, a product such as a liquid crystal display device, a configuration, or the like, but is merely used to indicate that a mutual positional relationship in a certain state is an up-down relationship. In other states, the mutual positional relationship may be upside down with respect to the above-described certain state, and may be a left-right relationship, a front-back relationship, or the like.
Each of the plurality of light shielding blocks 112 includes at least one corner portion 114. Each of the corner portions 114 is located between the peripheral portion 116 of the color resist 110 adjacent to the corresponding light shielding block 112 and the glass substrate 108.
The light 118 of the light 104 entering the color resist 110 and reaching the glass substrate 108 can exit through the glass substrate 108.
The light 120 of the light 104 that enters the color resist 110 but is blocked by the corner 114 tends to fail to reach and exit the glass substrate 108.
For example, each of the light shielding blocks 112 shown in fig. 1 has a trapezoidal cross section, and each of the color resists 110 includes a first surface 122 contacting the adjacent corner portion 114, a second surface 124 extending from one end of the first surface 122 and contacting the glass substrate 108, and a third surface 126 extending from the other end of the first surface 122 and contacting the corner portion 114.
The light rays 118 originating from the light source 102, entering the color resist 110, and reaching the second face 124 may exit through the glass substrate 108.
The light rays 120 originating from the light source 102, entering the color resists 110, being blocked by the first and third faces 122, 126 of the corner portion 114 may not reach and exit the glass substrate 108.
Moreover, the first surface 122 contacts with a corresponding oblique side of the trapezoidal section of the light shielding block 112, and an included angle α between the first surface 122 and the second surface 124 is greater than 90 degrees. In the case that each of the color resists 110 is surrounded by a plurality of adjacent light shielding blocks 112, the second surface 124 of each of the color resists 110 surrounded by the corresponding corner portion 114 has a smaller size, and the proportion of the light ray 118 that can pass through the second surface 124 and exit through the glass substrate 108 is relatively smaller than that of the light ray 104.
In addition, a portion of the light 128 from the light source 104 can not enter the color photoresist 110, which is probably due to being blocked and absorbed by the spacer 132 between the planarization layer 130 of the color filter substrate 106 and the array substrate 131. The planarization layer 130 is located between the plurality of color resists 110 and the plurality of light-shielding blocks 112 and the spacers 132.
For example, when the minimum acute angles between the light ray 118 and the glass substrate 108 in the same plane where the color resist 110 and the corner 114 intersect are β and γ, respectively, the exit angle of the light ray 104 may be 180 degrees minus β and γ, and is generally equal to or less than 150 degrees. Accordingly, the viewing angle of the liquid crystal display device 100 is also small. Moreover, the ratio of the light rays 118 emitted through the glass substrate 108 to the light rays 104 emitted from the light source 102 is small, so that the liquid crystal display device 100 has a room for improving the brightness.
Fig. 2 is a schematic front view of a color filter substrate according to an aspect of an embodiment of the invention. Fig. 3 is a schematic structural diagram of a liquid crystal display device according to another aspect of the embodiment of the invention, which includes the color filter substrate in fig. 2. Referring to fig. 2 and 3, a color filter substrate 10 includes: a glass substrate 12; a plurality of color resists 14 distributed on the glass substrate 12 at intervals; and a plurality of light-shielding spacers 16, each of the plurality of light-shielding spacers 16 including a light-shielding portion 18 extending from the glass substrate 12 and a reflective portion 20 extending from the light-shielding portion 18, the light-shielding portion 18 of the plurality of light-shielding spacers 16 contacting and surrounding the plurality of color resists 14.
The color filter substrate 10 of the embodiment of the invention can be applied to a liquid crystal display device, the plurality of color resists 14 of the color filter substrate 10 are in direct contact with the glass substrate 12, and no light shielding material blocks the light 220 therebetween, and the reflecting portion 20 of the light shielding spacer 16 can reflect the light 42 which does not enter the plurality of color resists 14, then enter the color resists 14, and exit through the glass substrate 12, which can be beneficial to increasing the exit angle of the light 44, and further improve the visual angle, brightness and the like of the corresponding liquid crystal display device.
The glass substrate 12 of the color filter substrate 10 according to the embodiment of the present invention may be transparent, so as to facilitate the light rays 40, 42 to pass through and exit.
With continued reference to fig. 2, the plurality of color resists 14 may include a plurality of resist units 140. The photoresist units 140 are spaced apart from each other and distributed on the glass substrate 12. Each of the plurality of photoresist units 140 may be a three-color photoresist unit including a red photoresist R, a green photoresist G, and a blue photoresist B arranged at intervals over the glass substrate 12.
In an embodiment not shown in the drawings, each of the plurality of photoresist units 140 may be a photoresist unit with four or more colors, and may include a yellow photoresist, a transparent photoresist, and the like in addition to the red photoresist R, the green photoresist G, and the blue photoresist B. The yellow photoresist and/or the transparent photoresist can be helpful to increase the color gamut saturation and/or the brightness of the liquid crystal display device. The red photoresist R, the green photoresist G, the blue photoresist B, the yellow photoresist and the transparent photoresist can be arranged in an island shape, a strip shape, a mosaic shape, a triangle shape, a quadrilateral shape and the like.
Referring to fig. 3, the light-shielding portions 18 of the light-shielding spacers 16 and the color resists 14 are distributed on the glass substrate 12 adjacent to each other. The height of the plurality of light-shielding spacers 16 may be any suitable value. Optionally, the height of the light-shielding spacers 16 extending from the glass substrate 12 ranges from 6 microns to 9 microns.
The thickness of the light shielding portion 18 of the light shielding spacer 16 extending from the glass substrate 12 may be equal to or slightly greater than the thickness of the color resists 14 extending from the glass substrate 12. The light-shielding portions 18 of the light-shielding spacers 16 can help prevent light 46 from passing through the glass substrate 12 except the color resists 14. The optical density of the light-shielding portions 18 of the plurality of light-shielding spacers 16 may be any suitable value. Optionally, the light-shielding portion 18 of the plurality of light-shielding spacers 16 has an optical density in a range of 3.5 to 5.
The reflective portion 20 of the plurality of light-shielding spacers 16 may be a portion of the plurality of light-shielding spacers 16 extending from the glass substrate 12 beyond the thickness of the plurality of color resists 14. The reflective portion 20 may include a reflective material, such as a reflective metal, e.g., silver, aluminum, etc. Optionally, the reflection portion 20 includes a main body portion 22 and a reflection layer 24 on a surface of the main body portion 22.
The body portion 22 may be a tapered cylinder. Optionally, the reflective layer 24 includes a side reflective layer 26 on a side surface of the main body portion 22. The side reflective layer 26 can reflect the light 42 incident thereon, so that the light 42 changes transmission route from not entering the plurality of color resists 14 to reflecting into the plurality of color resists 14 and then exiting through the glass substrate 12.
Optionally, the reflective layer 24 includes an end reflective layer 28 on an end surface of the body portion 22. The end reflection layer 28 is located at an end of the main body 22 away from the light shielding portion 18.
The reflective layer 24 may comprise any suitable reflective material. Optionally, the reflective layer 24 comprises a reflective metal.
The reflective metal may comprise any suitable metal, alloy, or any combination of metals and alloys. Optionally, the reflective layer 24 includes at least one of silver and aluminum.
The body portion 22 may extend from the light blocking portion 18 in any suitable manner. Alternatively, the main body portion 22 is integrally formed with the light shielding portion 18. This can contribute to the ease of processing and manufacturing the main body portion 22 and the light shielding portion 18.
The main body 22 and the light shielding portion 18 may be made of any suitable material. Alternatively, the main body 22 and the light shielding portion 18 may be made of the same material. Thus, light leakage can be prevented.
The main body portion 22 and the light shielding portion 18 may be made of any suitable material. Alternatively, the main body portion 22 and the light shielding portion 18 are made of an acrylic resin material and a carbon black pigment. Thus, light leakage can be prevented.
The light blocking portions 18 of the light blocking spacers 16 may surround and contact the color resists 14 in any suitable manner. Optionally, the light shielding portion 18 of each of the plurality of light shielding spacers 16 includes an overlapping portion 34 that overlaps an adjacent one of the plurality of colored light blockers 14. The overlapping portion 34 may help prevent light leakage.
Each of the plurality of color resists 14 may have a rectangular cross section. Optionally, each of the plurality of colored photo-resists 14 includes a first surface 30 contacting at least one of the plurality of light-shielding spacers 16 and a second surface 32 contacting the glass substrate 12, and the first surface 30 intersects the second surface 32 at an angle θ smaller than or equal to 90 degrees. The light 40, 220,42 entering the plurality of color resists 14 to the second side 32 may exit through the glass substrate 12.
Compared with the angle α between the first surface 122 and the second surface 124 in fig. 1 being greater than 90 degrees, in the embodiment of the present invention, the angle θ is less than or equal to 90 degrees, and in the case that the sum of the surface areas of each of the plurality of color resists 14 and the adjacent one of the plurality of light-shielding spacers 16 on the glass substrate 12 is equal to the sum of the surface areas of each of the plurality of color resists 110 and the adjacent one of the plurality of light-shielding blocks 112 on the glass substrate 108, the size of the second surface 32 is larger than that of the second surface 124, and relatively more light rays 40, 220,42 can reach and pass through the second surface 32 after entering the color resists 14.
For example, the light rays 220 with the corresponding exit angles to the light rays 120 blocked by the corner portions 114 in fig. 1 may reach the second face 32 and exit through the glass substrate 12. That is to say, in the case that the total area occupied by the plurality of color resists 14 and the plurality of light-shielding spacers 16 of the color filter substrate 10 of the embodiment of the invention on the glass substrate 12 is equal to the total area occupied by the plurality of color resists 110 and the plurality of light-shielding blocks 112 on the glass substrate 108 of the color filter substrate 106 in fig. 1, the exit angle of the light ray 44 is greater than the exit angle of the light ray 104.
For example, when the minimum acute angles between the light 44 and the glass substrate 12 in the same plane, which are emitted from the intersection of the color photoresist 14 and the light-shielding spacer 16, are β 1 and γ 1, respectively, the emission angle of the light 44 may be a difference obtained by subtracting β 1 and γ 1 from 180 degrees, which is generally greater than 150 degrees, or greater than or equal to 170 degrees, and the viewing angle of the corresponding liquid crystal display device is also large, and the brightness may be improved by about 5%, 5% to 10%, or about 10%.
Optionally, the color filter substrate 10 includes a flat layer 36 located above the plurality of color resists 14 and between the plurality of light-shielding spacers 16, and a thickness of the flat layer 36 extending from the glass substrate 12 is smaller than a height of the plurality of light-shielding spacers 16 extending from the glass substrate 12. The thickness of the planarization layer 36 can range from 0.5 microns to 3 microns. The planarization layer 36 may mainly include a photosensitive resin material. The planarization layer 36 can help planarize a surface of a color resist layer (not numbered) including the plurality of color resists 14, thereby improving display performance of the corresponding liquid crystal display device 50.
Referring to fig. 3, another liquid crystal display device 50 according to another aspect of the present invention includes: the color filter substrate 10, the array substrate 52 opposite to the color filter substrate 10, the liquid crystal 54 filled between the array substrate 52 and the color filter substrate 10, and the light source 55 are described above.
In the liquid crystal display device 50 according to the embodiment of the present invention, the plurality of color resists 14 of the color filter substrate 10 directly contact the glass substrate 12, and there is no light blocking material to block the light 220 therebetween, and the reflection portion 20 of the light blocking spacer 16 can reflect the light 42 that does not enter the plurality of color resists 14, and then enter the color resists 14 and exit through the glass substrate 12, which is beneficial to increasing the exit angle of the light 44, so as to improve the viewing angle, brightness, and the like of the corresponding liquid crystal display device.
The array substrate 52 may include a Thin Film Transistor (TFT). Optionally, the array substrate 52 abuts the plurality of light-shielding spacers 16. The plurality of light-shielding spacers 16 can help to keep a certain distance between the array substrate 52 and the color filter substrate 10, so that the liquid crystal 54 has a space for injecting, thereby preventing gray scale display of the liquid crystal 54 from being affected, and the liquid crystal 54 is protected when the liquid crystal display device 50 is pressed by an external force, thereby preventing the liquid crystal 54 from being damaged by unrecoverable deformation.
The light source 55 of the liquid crystal display device 50 that emits the light rays 44 may be of any suitable construction. Optionally, the light source 55 includes a surface light source 56, and the array substrate 52 is located between the surface light source 56 and the plurality of light-shielding spacers 16. The plurality of light-shielding spacers 16 can help to keep a certain distance between the array substrate 52 and the color filter substrate 10, so that the liquid crystal 54 has a space for injecting, thereby preventing gray scale display of the liquid crystal 54 from being affected, and the liquid crystal 54 is protected when the liquid crystal display device 50 is pressed by an external force, thereby preventing the liquid crystal 54 from being damaged by unrecoverable deformation.
Optionally, the reflection portion 20 is closer to the surface light source 56 than the plurality of color resists 14. Thus, when the light 42 emitted from the surface light source 56 reaches the reflection portion 20 because of an angular relationship, if the light cannot enter the plurality of color resists 14 due to non-reflection, the light can enter the plurality of color resists 14 after being reflected by the reflection portion 20.
Fig. 4 is a schematic structural view of a liquid crystal display device according to further embodiments of the present invention. Referring to fig. 4, optionally, the light source 55 includes a plurality of point light sources 58, and the array substrate 52 is located between the plurality of light-shielding spacers 16 and the plurality of point light sources 58. The plurality of point light sources 58 may correspond to the plurality of color resists 14 one to one, which may facilitate individual adjustment of the light sources for each of the plurality of color resists 14, and improve the display control performance of the liquid crystal display device 50. The light-shielding spacers 16 can help to keep a certain distance between the array substrate 52 and the color filter substrate 10, so that the liquid crystal 54 has a space for injecting, thereby preventing gray scale display of the liquid crystal 54 from being affected, and when the liquid crystal display device 50 is pressed by an external force, the liquid crystal 54 is protected, thereby preventing the liquid crystal 54 from being damaged by unrecoverable deformation.
Optionally, the reflection portion 20 is closer to the plurality of point light sources 58 than the plurality of color resists 14. Thus, when the light 42 emitted by the plurality of point light sources 58 reaches the reflection portion 20 due to an angular relationship, if the light cannot enter the plurality of color resists 14 without reflection, the light can enter the plurality of color resists 14 after being reflected by the reflection portion 20.
Fig. 5 is a schematic flow chart illustrating a method for manufacturing a color filter substrate according to another aspect of the embodiment of the invention. As shown in fig. 5, a method 70 for manufacturing a color filter substrate according to another aspect of the embodiment of the present invention includes the following steps: 72. providing a glass substrate; 74. forming a plurality of color photoresists on the glass substrate at intervals; and 76, forming a plurality of light-shielding spacers, each of the plurality of light-shielding spacers comprising a light-shielding portion extending from the glass substrate and a reflective portion extending from the light-shielding portion, the light-shielding portions of the plurality of light-shielding spacers contacting and surrounding the plurality of color resists.
The color filter substrate manufactured by the manufacturing method 70 according to the embodiment of the invention can be applied to a liquid crystal display device, the plurality of color resists of the color filter substrate are in direct contact with the glass substrate, and no light blocking material blocks light rays between the plurality of color resists, and the reflecting portion of the light blocking spacer can reflect light rays which do not enter the plurality of color resists originally, then enter the color resists and exit through the glass substrate, so that the increase of the exit angle of the light rays can be facilitated, and the visual angle, the brightness and the like of the corresponding liquid crystal display device can be further improved.
The glass substrate provided in step 72 of the embodiment of the present invention may be transparent, so as to facilitate the passing and exiting of light.
In step 74 of the embodiment of the present invention, a plurality of color resists are formed on the glass substrate and are distributed at intervals, which can be implemented by using a pigment dispersion method. For example, a red, green, and blue resist material is coated on the surface of the glass substrate, and then, after a preheating process, exposure is performed using an exposure machine and a mask having a predetermined pattern. Then, development is performed in a developing apparatus to dissolve the portion that is not irradiated with light in a developing solution, so as to obtain a color resist layer including the plurality of color resists that are distributed at intervals after development.
In step 76 of the embodiment of the present invention, a plurality of light-shielding spacers are formed, each of which includes a light-shielding portion extending from the glass substrate and a reflection portion extending from the light-shielding portion, and the light-shielding portions of the plurality of light-shielding spacers contact and surround the plurality of color resists, and may be implemented by a pigment dispersion method, and the raw material of the color resists may be replaced with the raw material of the light-shielding spacers in the corresponding step of the pigment dispersion method. The light-shielding spacers are formed on the surface of the glass substrate not covered by the color resists. The plurality of light-shielding spacers may be formed by a transfer method.
Optionally, the forming a plurality of light-shielding spacers, each of the plurality of light-shielding spacers including a light-shielding portion extending from the glass substrate and a reflective portion extending from the light-shielding portion, and the step 76 of contacting and surrounding the plurality of color resists includes forming a main portion of the reflective portion and a reflective layer on a surface of the main portion.
The main body portion forming the reflection portion may be implemented by a pigment dispersion method, and a raw material of the color resist may be replaced with a raw material of the main body portion in the respective steps of the above pigment dispersion method. The main body portion may be formed at an end of the light shielding portion remote from the glass substrate, or may be integrally formed with the light shielding portion. The main body and/or the light shielding portion may be formed by a transfer method.
The reflective layer may be formed by sputtering a reflective material on the surface of the body portion, coating a photoresist, exposing, etching with an acid chemical, and stripping the photoresist.
The reflective layer may comprise any suitable reflective material. Optionally, the reflective layer comprises a reflective metal.
Optionally, each of the plurality of color resists includes a first surface contacting an adjacent one of the plurality of light-shielding spacers and a second surface contacting the glass substrate, and the first surface intersects the second surface at an included angle of 90 degrees or less. The light rays entering the plurality of color light resistors reach the second surface and can be emitted out through the glass substrate.
Compared with the angle α between the first surface 122 and the second surface 124 in fig. 1 being greater than 90 degrees, because the angle α in the embodiment of the present invention is less than or equal to 90 degrees, when the sum of the surface areas of the glass substrate occupied by each of the plurality of color resists and the adjacent one of the plurality of light-shielding spacers is equal to the sum of the surface areas of the glass substrate 108 occupied by each of the plurality of color resists 110 and the adjacent one of the plurality of light-shielding blocks 112, the size of the second surface is larger than that of the second surface 124, and relatively more light rays can reach and pass through the second surface after entering the color resists.
For example, light rays corresponding to the light rays 120 blocked by the corner portions 114 in fig. 1 may reach the second face and exit through the glass substrate. That is to say, in the case that the total area occupied by the plurality of color resists and the plurality of light-shielding spacers of the color filter substrate manufactured by the method of the embodiment of the invention on the glass substrate is equal to the total area occupied by the plurality of color resists 110 and the plurality of light-shielding blocks 112 on the glass substrate 108 of the color filter substrate 106 in fig. 1, the exit angle of the light is greater than the exit angle of the light 104.
For example, the exit angle of the light in the embodiment of the present invention may be a difference obtained by subtracting a minimum acute angle between the light respectively emitted from two intersecting positions of the color photoresist and the light-shielding spacer in the same plane and the glass substrate from 180 degrees, which is generally greater than 150 degrees or equal to or greater than 170 degrees, and the viewing angle of the corresponding liquid crystal display device is also large, and the brightness may be improved by about 5%, 5% to 10%, or about 10%.
Optionally, the method 70 for manufacturing the color filter substrate includes forming a flat layer on the plurality of color resists and between the plurality of light-shielding spacers, where a thickness of the flat layer extending from the glass substrate is smaller than a height of the plurality of light-shielding spacers extending from the glass substrate. The thickness of the planarization layer may range from 0.5 micrometers to 3 micrometers. The planarization layer may mainly include a photosensitive resin material. The flat layer can help to flatten the surface of the color photoresist layer including the plurality of color photoresists, and improve the display performance of the corresponding liquid crystal display device.
The formation of the flat layer may be performed by a dyeing method, a pigment dispersion method, a printing method, an electrodeposition method, an inkjet method, or the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (20)
1. A color filter substrate (10), comprising:
a glass substrate (12);
a plurality of color resists (14) distributed on the glass substrate (12) at intervals; and
a plurality of light-shielding spacers (16), each of the plurality of light-shielding spacers (16) including a light-shielding portion (18) extending from the glass substrate (12) and a reflective portion (20) extending from the light-shielding portion (18), the light-shielding portions (18) of the plurality of light-shielding spacers (16) contacting and surrounding the plurality of color resists (14).
2. The color filter substrate (10) according to claim 1, wherein the reflective portion (20) comprises a main body portion (22) and a reflective layer (24) on a surface of the main body portion (22).
3. The color filter substrate (10) according to claim 2, wherein the reflective layer (24) includes a side reflective layer (26) on a side surface of the main body portion (22).
4. The color filter substrate (10) of claim 3, wherein the reflective layer (24) comprises an end reflective layer (28) on an end surface of the body portion (22).
5. The color filter substrate (10) of claim 2, wherein the reflective layer (24) comprises a reflective metal.
6. The color filter substrate (10) of claim 2, wherein the reflective layer (24) comprises at least one of silver and aluminum.
7. The color filter substrate (10) according to claim 2, wherein the main body portion (22) is integrally formed with the light shielding portion (18).
8. The color filter substrate (10) according to claim 2, wherein the main body portion (22) and the light shielding portion (18) are made of the same material.
9. The color filter substrate (10) according to claim 2, wherein the main body portion (22) and the light shielding portion (18) are made of an acrylic resin material and a carbon black pigment.
10. The color filter substrate (10) of claim 1, wherein each of the plurality of color resists (14) comprises a first face (30) in contact with at least one of the plurality of light blocking spacers (16) and a second face (32) in contact with the glass substrate (12), the first face (30) intersecting the second face (32) at an angle (θ) of 90 degrees or less.
11. A liquid crystal display device (50) comprising the color filter substrate (10) according to any one of claims 1 to 10, an array substrate (52) opposite to the color filter substrate (10), liquid crystals (54) filled between the array substrate (52) and the color filter substrate (10), and a light source (55).
12. The liquid crystal display device (50) of claim 11, wherein the array substrate (52) abuts the plurality of light-blocking spacers (16).
13. The liquid crystal display device (50) according to claim 11, wherein the light source (55) comprises a surface light source (56), and the array substrate (52) is positioned between the surface light source (56) and the plurality of light-shielding spacers (16).
14. The liquid crystal display device (50) according to claim 13, wherein the reflection portion (20) is closer to the surface light source (56) than the plurality of color resists (14).
15. The liquid crystal display device (50) of claim 11, wherein the light source (55) comprises a plurality of point light sources (58), and the array substrate (52) is positioned between the plurality of light-shielding spacers (16) and the plurality of point light sources (58).
16. The liquid crystal display device (50) of claim 15, wherein the reflective portion (20) is closer to the plurality of point light sources (58) than the plurality of color resists (14).
17. A method (70) for manufacturing a color filter substrate, comprising the steps of:
(72) providing a glass substrate;
(74) forming a plurality of color photoresists which are distributed at intervals on the glass substrate; and
(76) and forming a plurality of light-shielding spacing pillars, wherein each of the plurality of light-shielding spacing pillars comprises a light-shielding part extending from the glass substrate and a reflection part extending from the light-shielding part, and the light-shielding parts of the plurality of light-shielding spacing pillars are in contact with and surround the plurality of color photoresists.
18. The method (70) of claim 17, wherein the step (76) includes forming a body portion of the reflective portion and a reflective layer on a surface of the body portion.
19. The method (70) of manufacturing a color filter substrate according to claim 18, wherein the reflective layer comprises a reflective metal.
20. The method (70) of claim 17, wherein each of the plurality of color resists includes a first surface contacting at least one of the plurality of light-blocking spacers and a second surface contacting the glass substrate, and the first surface intersects the second surface at an angle of 90 degrees or less.
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| CN202011584957.7A CN114690470A (en) | 2020-12-28 | 2020-12-28 | Color filter substrate, manufacturing method thereof and liquid crystal display device |
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| CN202011584957.7A CN114690470A (en) | 2020-12-28 | 2020-12-28 | Color filter substrate, manufacturing method thereof and liquid crystal display device |
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