CN114690471A - 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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- CN114690471A CN114690471A CN202011587927.1A CN202011587927A CN114690471A CN 114690471 A CN114690471 A CN 114690471A CN 202011587927 A CN202011587927 A CN 202011587927A CN 114690471 A CN114690471 A CN 114690471A
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- 239000000758 substrate Substances 0.000 title claims abstract description 176
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 99
- 125000006850 spacer group Chemical group 0.000 claims abstract description 74
- 229920002120 photoresistant polymer Polymers 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 13
- 239000000049 pigment Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
-
- 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
-
- 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
- G02F1/133514—Colour filters
-
- 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
- G02F1/133514—Colour filters
- G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
-
- 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
- G02F1/1336—Illuminating devices
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optical Filters (AREA)
- Liquid Crystal (AREA)
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) which are distributed on the glass substrate (12) at intervals; and a plurality of light-shielding spacers (16) surrounding the plurality of color resists (14) on the glass substrate (12), each of the plurality of color resists (14) including an edge portion (18), the edge portion (18) contacting at least one of the plurality of light-shielding spacers (16) and the glass substrate (12), the edge portion (18) defining a light-transmitting portion (20) within the corresponding color resist (14), the light-transmitting portion (20) allowing light rays (22) to pass therethrough to exit through the glass substrate (12). The embodiment of the invention is beneficial to increasing the emergent angle of the light of the liquid crystal display device, thereby improving the visual angle 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 displays such as Liquid Crystal Display (LCD) devices, a large viewing angle is often better suited to the actual use requirements of customers. The viewing angle of the liquid crystal display device is related to the exit angle of the light emitted by the light source in the liquid crystal display device. The structure of the color filter substrate of the liquid crystal display device often affects the exit angle of light.
However, the existing color filter substrate and the manufacturing method thereof are not ideal, so that the emergent angle and the visual angle of the light of the liquid crystal display device have space for improvement.
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 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 spacing pillars surrounding the plurality of color resists on the glass substrate, each of the plurality of color resists including an edge portion contacting at least one of the plurality of light-shielding spacing pillars and the glass substrate, the edge portion defining a light-transmitting portion within the corresponding color resist, the light-transmitting portion allowing light to pass therethrough to exit through the glass substrate.
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.
Optionally, the height of the plurality of light-shielding spacers extending from the glass substrate is in a range from 6 micrometers to 9 micrometers.
Optionally, the optical density of the plurality of light-shielding spacers ranges from 3.5 to 5.
Optionally, the plurality of light-shielding spacers are made of acrylic resin material and carbon black pigment.
Optionally, each of the plurality of light-shielding spacers includes an overlapping portion overlapping an adjacent one of the plurality of color resists.
Optionally, the color filter substrate includes a flat layer located above the plurality of color resists and between the plurality of light-shielding spacers, and 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.
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 emitting the light.
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 color filter substrate.
Optionally, the light source includes a plurality of point light sources, and the array substrate is located between the plurality of point light sources and the color filter substrate.
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 spacing pillars surrounding the plurality of color light resistors on the glass substrate, wherein each of the plurality of color light resistors comprises an edge part which is in contact with at least one of the plurality of light-shielding spacing pillars and the glass substrate, the edge part defines a light-transmitting part in the corresponding color light resistor, and the light-transmitting part can allow light to pass through so as to be emitted out through the glass substrate.
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.
Optionally, the height of the plurality of light-shielding spacers extending from the glass substrate is in a range from 6 micrometers to 9 micrometers.
Optionally, the optical density of the plurality of light-shielding spacers ranges from 3.5 to 5.
Optionally, the plurality of light-shielding spacers are made of an acrylic resin material and a carbon black pigment.
Optionally, each of the plurality of light-shielding spacers includes an overlapping portion overlapping an adjacent one of the plurality of color resists.
Optionally, the method 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 technical scheme of the embodiment of the invention is beneficial to increasing the emergent angle of the light of the liquid crystal display device, thereby improving the visual angle 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 illustrating a method for manufacturing a color filter substrate according to another aspect of the embodiment of the invention.
Detailed Description
Fig. 1 is a schematic structural diagram of a liquid crystal display device. Referring to fig. 1, a light 104 emitted from a light source 102 of a liquid crystal display device 100 is transmitted in a direction indicated by an arrow in the figure, and at least enters 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 from passing through the light 104.
Unless otherwise specifically stated, the term "above" used herein does not mean a specific up-down orientation in a product, a configuration, or the like, but is merely used to indicate that a positional relationship with each other in a certain state is up-down. 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-rear relationship, or the like.
Each of the 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. Of the light rays 104 entering the color resist 110, light rays 118 that are not blocked by the corner portions 114 can pass through and exit the glass substrate 108. Of the light rays 104 entering the color resists 110, the light rays 120 blocked by the corner portions 114 cannot pass through and exit the glass substrate 108.
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 corresponding 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. 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. On the other hand, the light rays 120 from the light source 102, entering the color resist 110, and reaching the first surface 122 and the third surface 126 are blocked by the corner portion 114 and cannot pass through or exit through the glass substrate 108. In addition, the included angle α between the first surface 122 and the second surface 124 is greater than 90 degrees, and the size of the second surface 124 enclosed by the corner portion 114 is smaller.
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.
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 surrounding the plurality of color resists 14 on the glass substrate 12, each of the plurality of color resists 14 including an edge portion 18, the edge portion 18 contacting at least one of the plurality of light-shielding spacers 16 and the glass substrate 12, the edge portion 18 defining a light-transmitting portion 20 in the corresponding color resist 14, the light-transmitting portion 20 allowing light 22 to pass therethrough to exit through the glass substrate 12.
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 is arranged between the color resists 14 and the glass substrate 12 to block the light 22, so that the emergent angle of the light 22 can be increased, and the visual angle of the corresponding liquid crystal display device can be further improved.
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 22 to pass through and exit.
The plurality of color resists 14 may include a plurality of resist units 140. The plurality of photoresist units 140 are distributed on the glass substrate 12 at intervals. 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 help to increase the color gamut saturation or 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, optionally, each of the plurality of color resists 14 includes a first surface 24 contacting an adjacent one of the plurality of light-shielding spacers 16 and a second surface 26 contacting the glass substrate 12, and the first surface 24 intersects the second surface 26 at an angle θ smaller than or equal to 90 degrees. The light 22 entering the plurality of color resists 14 can reach the second surface 26 and can 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 occupied by 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 occupied by 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 26 is larger than that of the second surface 124, and relatively more light rays can reach and pass through the second surface 26 after entering the color resists 14. For example, a ray 220 corresponding to the ray 120 blocked by the corner 114 in fig. 1 may reach the second face 26 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 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 22 is greater than the exit angle of the light ray 104.
For example, when the minimum acute angles between the light ray 22 and the glass substrate 12 in the same plane where the color photoresist 14 and the light-shielding spacer 16 intersect are β 1 and γ 1, respectively, the exit angle of the light ray 22 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.
The plurality of light-shielding spacers 16 are formed on the glass substrate 12. The height of the plurality of light-shielding spacers 16 may be any suitable value. Optionally, the height H of the light-shielding spacers 16 extending from the glass substrate 12 is in a range of 6 microns to 9 microns.
The plurality of light-shielding spacers 16 surround each of the plurality of color resists 14 and may be used to block the light 22 from exiting through the glass substrate 12 from locations other than the plurality of color resists 14. The optical density of the plurality of light-shielding spacers 16 may be any suitable value. Optionally, the optical density of the plurality of light-shielding spacers 16 is in the range of 3.5 to 5.
The plurality of light-shielding spacers 16 may be made of any suitable material. Alternatively, the plurality of light-shielding spacers 16 are made of an acrylic resin material and a carbon black pigment. The plurality of light-shielding spacers 16 may surround and contact the plurality of color resists 14 in any suitable manner. Optionally, each of the plurality of light-shielding spacers 16 includes an overlap 28 that overlaps an adjacent one of the plurality of colored photoresists 14. The overlapping portion 28 may help prevent light leakage.
Optionally, the color filter substrate 10 includes a flat layer 30 located above the plurality of color resists 14 and between the plurality of light-shielding spacers 16, and a thickness T of the flat layer 30 extending from the glass substrate 12 is smaller than a height H of the plurality of light-shielding spacers 16 extending from the glass substrate 12. The thickness T may range from 0.5 microns to 3 microns. The planarization layer 30 may mainly include a photosensitive resin material. The planarization layer 30 can help planarize the surface of a color resist layer (not numbered) including the plurality of color resists 14, thereby improving the display performance of the corresponding liquid crystal display device.
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 for emitting the light 22.
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 no light blocking material blocks the light 22 therebetween, which is beneficial to increase the exit angle of the light 22 of the liquid crystal display device 50, and further improve the viewing angle of the liquid crystal display device 50.
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 22 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 color filter substrate 10. 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.
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 point light sources 58 and the color filter substrate 10. 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 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.
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 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 spacing pillars surrounding the plurality of color resists on the glass substrate, wherein each of the plurality of color resists comprises an edge part which is contacted with at least one of the plurality of light-shielding spacing pillars and the glass substrate, and the edge part defines a light-transmitting part in the corresponding color resist, and the light-transmitting part can allow light to pass through so as to be emitted out through the glass substrate.
The plurality of color resists of the color filter substrate manufactured by the manufacturing method 70 of the embodiment of the invention are in direct contact with the glass substrate, and no light-shielding material is arranged between the color resists and the glass substrate to block the light, so that the emergent angle of the light can be increased, and the visual angle of the 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 light to pass through and exit.
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 treatment is performed using a hot plate, 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 the step 76 of the embodiment of the present invention, a plurality of light-shielding spacers surrounding the plurality of color resists are formed on the glass substrate, which may be implemented by using a pigment dispersion method, and the raw material of the color resists may be replaced by 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, 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 can 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 each of the plurality of color resists and the adjacent one of the plurality of light-shielding spacers on the glass substrate 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 is larger than that of the second surface 124, and relatively more light can reach and pass through the second surface after entering the color resists.
For example, a light ray 220 corresponding to the light ray 120 blocked by the corner 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, when the exit angle of the light is 180 degrees minus two minimum acute angles between the light and the glass substrate in the same plane where the color photoresist intersects with the light-shielding spacer, the exit angle 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 larger.
The plurality of light-shielding spacing columns are formed on the glass substrate. The height of the plurality of light-shielding spacers can be any suitable value. Optionally, the height of the plurality of light-shielding spacers extending from the glass substrate is in a range from 6 micrometers to 9 micrometers.
The plurality of light-shielding spacing columns surround each of the plurality of color light resistors and can be used for blocking the light rays from being emitted out of the glass substrate from places except the plurality of color light resistors. The optical density of the plurality of light-shielding spacers can be any suitable value. Optionally, the optical density of the plurality of light-shielding spacers ranges from 3.5 to 5.
The plurality of light-shielding spacers may be made of any suitable material. Optionally, the plurality of light-shielding spacers are made of an acrylic resin material and a carbon black pigment. The plurality of light-shielding spacers can surround and contact the plurality of color resists in any suitable manner. Optionally, each of the plurality of light-shielding spacers includes an overlapping portion overlapping an adjacent one of the plurality of color resists. The overlapping portion may help to prevent light leakage.
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 may range from 0.5 microns to 3 microns. 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 therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (18)
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) surrounding the plurality of color resists (14) on the glass substrate (12), each of the plurality of color resists (14) including an edge portion (18), the edge portion (18) contacting at least one of the plurality of light-shielding spacers (16) and the glass substrate (12), the edge portion (18) defining a light-transmitting portion (20) within the corresponding color resist (14), the light-transmitting portion (20) allowing light rays (22) to pass therethrough for exit through the glass substrate (12).
2. The color filter substrate (10) of claim 1, wherein each of the plurality of color resists (14) includes a first face (24) in contact with an adjacent one of the plurality of light blocking spacers (16) and a second face (26) in contact with the glass substrate (12), the first face (24) intersecting the second face (26) at an angle (θ) of 90 degrees or less.
3. The color filter substrate (10) of claim 1, wherein the height (H) of the plurality of light-shielding spacers (16) extending from the glass substrate (12) is in a range of 6 microns to 9 microns.
4. The color filter substrate (10) of claim 1, wherein the plurality of light-blocking spacers (16) have an optical density in the range of 3.5 to 5.
5. The color filter substrate (10) of claim 1, wherein the plurality of light-shielding spacers (16) are made of an acrylic resin material and a carbon black pigment.
6. The color filter substrate (10) of claim 1, wherein each of the plurality of light-shielding spacers (16) includes an overlap (28) that overlaps an adjacent one of the plurality of color resists (14).
7. The color filter substrate (10) of claim 1, comprising a planarization layer (30) on the plurality of color resists (14) between the plurality of light-shielding spacers (16), wherein a thickness (T) of the planarization layer (30) extending from the glass substrate (12) is less than a height (H) of the plurality of light-shielding spacers (16) extending from the glass substrate (12).
8. A liquid crystal display device (50) comprising a color filter substrate (10) according to any one of claims 1 to 7, 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) emitting the light rays (22).
9. The liquid crystal display device (50) of claim 8, wherein the array substrate (52) abuts the plurality of light-blocking spacers (16).
10. The liquid crystal display device (50) according to claim 8, wherein the light source (55) comprises a surface light source (56), and the array substrate (52) is located between the surface light source (56) and the color filter substrate (10).
11. The liquid crystal display device (50) of claim 8, wherein the light source (55) comprises a plurality of point light sources (58), and the array substrate (52) is located between the plurality of point light sources (58) and the color filter substrate (10).
12. 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 surrounding the plurality of color light resistors on the glass substrate, wherein each of the plurality of color light resistors comprises an edge part which is in contact with at least one of the plurality of light-shielding spacing pillars and the glass substrate, the edge part defines a light-transmitting part in the corresponding color light resistor, and the light-transmitting part can allow light to pass through so as to be emitted out through the glass substrate.
13. The method (70) of claim 12, wherein each of the plurality of color resists includes a first surface contacting an adjacent 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.
14. The method (70) of claim 12, wherein the light-blocking spacers extend from the glass substrate to a height in a range of 6 microns to 9 microns.
15. The method (70) of claim 12, wherein the light density of the light-shielding spacers is in a range of 3.5 to 5.
16. The method (70) of claim 12, wherein the light-shielding spacers are made of acrylic resin and carbon black pigment.
17. The method (70) of claim 12, wherein each of the plurality of light-blocking spacers includes an overlap portion that overlaps an adjacent one of the plurality of color resists.
18. The method (70) of claim 12, including forming a planarization layer on the color resists and between the light-shielding spacers, wherein the planarization layer extends from the glass substrate to a thickness less than a height of the light-shielding spacers extending from the glass substrate.
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| CN202011587927.1A CN114690471A (en) | 2020-12-28 | 2020-12-28 | Color filter substrate, manufacturing method thereof and liquid crystal display device |
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| CN202011587927.1A CN114690471A (en) | 2020-12-28 | 2020-12-28 | Color filter substrate, manufacturing method thereof and liquid crystal display device |
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