CN109164628B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109164628B CN109164628B CN201811133635.3A CN201811133635A CN109164628B CN 109164628 B CN109164628 B CN 109164628B CN 201811133635 A CN201811133635 A CN 201811133635A CN 109164628 B CN109164628 B CN 109164628B
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- transparent
- substrate
- intermediate layer
- light
- display panel
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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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
Abstract
The invention provides a display panel and a display device, wherein a COA upper substrate comprises: the black matrix layer is arranged on the transparent substrate, the transparent intermediate layer is arranged on an exposed area of the transparent substrate, and the transparent electrode layer is arranged on the black matrix layer and the transparent intermediate layer; therefore, direct contact between the ITO and the glass substrate is avoided based on the transparent interlayer, the reflectivity of light rays at the ITO can be well reduced, and the technical problem that the contact position of the ITO and the glass substrate reflects light in the existing display panel is solved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a display panel and a display device.
Background
At present, the liquid crystal display mainly includes a COA (color Filter On Array) technology and a Non-COA technology, where COA is to coat a color photoresist On a completed Array (Array) to form a color Filter layer, which can improve the problem of low aperture ratio of the conventional color Filter.
As shown in fig. 1, an upper substrate (i.e., a COA upper substrate) of a COA display panel based on photo-alignment includes: the transparent substrate (such as a glass substrate), the black matrix layer BM, and the transparent electrode layer ITO as the common electrode, the black matrix layer BM is formed on the transparent substrate, the transparent electrode layer ITO is formed on the black matrix layer BM and the exposed area of the transparent substrate (the area without BM), at the contact position of ITO and the glass substrate, because the refractive index difference of the two to light is great (the refractive index n of the glass substrate is 1.50, the refractive index n of the ITO is 1.80), the ITO can reflect light, and has certain influence on the light transmittance and contrast of the liquid crystal display.
Namely, the existing display panel has the technical problem that the contact position of the ITO and the glass substrate can reflect light.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for relieving the technical problem of light reflection at the contact position of an ITO (indium tin oxide) and a glass substrate of the conventional display panel.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
an embodiment of the present invention provides a display panel, including: the TFT substrate comprises a TFT lower substrate and a COA upper substrate which is arranged corresponding to the TFT lower substrate; the COA upper substrate comprises:
a transparent substrate;
a black matrix layer disposed on the transparent substrate;
a transparent intermediate layer disposed on an exposed region of the transparent substrate;
a transparent electrode layer disposed on the black matrix layer and the transparent intermediate layer;
wherein the optical refractive index of the transparent intermediate layer is between the optical refractive index of the transparent substrate and the optical refractive index of the transparent electrode layer.
According to a preferred embodiment of the present invention, the thickness of the transparent intermediate layer is equal to the thickness of the black matrix layer.
According to a preferred embodiment of the present invention, the transparent intermediate layer is filled with optical nanoparticles.
According to a preferred embodiment of the present invention, the photo nanoparticles include at least one of first photo nanoparticles for absorbing yellow-orange light and second photo nanoparticles for absorbing cyan-green light.
According to a preferred embodiment of the present invention, the optical nanoparticles comprise rhodamine-based derivatives.
According to a preferred embodiment of the present invention, the photo nanoparticles comprise a mixed system of metal nanoparticles and rhodamine-based derivative dyes.
According to a preferred embodiment of the invention, the transparent intermediate layer comprises at least two layers of transparent material.
According to a preferred embodiment of the present invention, the material of the transparent intermediate layer is transparent resin.
According to a preferred embodiment of the present invention, the transparent resin includes at least one of poly (1, 2-butadiene), poly (2-vinyltetrahydrofuran), poly (2-vinylthiophene), polycarbonate, polyester resin, polyethylene, polystyrene-benzonitril, polyurethane, and polyvinyl chloride.
The embodiment of the invention provides a display device which comprises the display panel provided by the embodiment of the invention.
The invention has the beneficial effects that: the present invention provides a novel display panel and a display device, wherein the COA upper substrate inside the display panel comprises: a transparent substrate; a black matrix layer disposed on the transparent substrate; a transparent intermediate layer disposed on an exposed region of the transparent substrate; a transparent electrode layer disposed on the black matrix layer and the transparent intermediate layer; the optical refractive index of the transparent intermediate layer is between that of the transparent substrate and that of the transparent electrode layer; therefore, direct contact between the ITO and the glass substrate is avoided, the reflectivity of light rays at the ITO can be well reduced, and the technical problem that the contact position of the ITO and the glass substrate reflects light in the existing display panel is solved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a COA display panel
FIG. 2 is a schematic diagram of a first structure of a COA display panel provided in the present invention;
FIG. 3 is a schematic diagram of a second structure of a COA display panel provided in the present invention;
FIG. 4 is a schematic diagram of a third structure of a COA display panel provided by the present invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
The invention aims at the technical problem that the contact position of the ITO and the glass substrate of the existing display panel can reflect light; the embodiment of the invention can solve the defect.
As shown in fig. 2, the display panel provided by the present invention includes: a TFT lower substrate 21 and a COA upper substrate 22 arranged corresponding to the TFT lower substrate 21 are arranged; the COA upper substrate 22 includes:
a transparent substrate 221;
a black matrix layer 222 disposed on the transparent substrate 221;
a transparent intermediate layer 223 disposed on the exposed region of the transparent substrate 221;
a transparent electrode layer 224 disposed on the black matrix layer 222 and the transparent intermediate layer 223;
wherein the optical refractive index of the transparent intermediate layer 223 is between the optical refractive index of the transparent substrate 221 and the optical refractive index of the transparent electrode layer 224.
Optionally, the refractive index n of the transparent substrate, i.e., the glass substrate, is 1.50, and the refractive index n of the transparent electrode layer, i.e., the indium tin oxide ITO, is 1.80, and in order to reduce the cost, the material of the transparent intermediate layer is a transparent resin, and the refractive index of the transparent resin is between that of the glass and the ITO.
Optionally, the transparent resin includes one or more of poly (1, 2-butadiene) (having a refractive index n of 1.51), poly (2-vinyltetrahydrofuran) (having a refractive index n of 1.55), poly (2-vinylthiophene) (having a refractive index n of 1.6376), polycarbonate (having a refractive index n of 1.60), polyester resin (having a refractive index n of 1.523 to 1.54), polyethylene (having a refractive index n of 1.50 to 1.54), polystyrene (having a refractive index n of 1.6), polystyrene-benzonitrile (having a refractive index n of 1.56 to 1.57), polyurethane (having a refractive index n of 1.50 to 1.60), and polyvinyl chloride (having a refractive index n of 1.54).
The present embodiment provides a new display panel, in which a COA upper substrate includes: a transparent substrate; a black matrix layer disposed on the transparent substrate; a transparent intermediate layer disposed on an exposed region of the transparent substrate; a transparent electrode layer disposed on the black matrix layer and the transparent intermediate layer; the optical refractive index of the transparent intermediate layer is between that of the transparent substrate and that of the transparent electrode layer; therefore, direct contact between the ITO and the glass substrate is avoided, the reflectivity of light rays at the ITO can be well reduced, and the technical problem that the contact position of the ITO and the glass substrate reflects light in the existing display panel is solved.
In the conventional display device shown in fig. 1, the transparent electrode layer 224 is not flat, so as to enhance the flatness of the substrate on the COA and improve the contrast; as shown in fig. 2, the thickness of the transparent intermediate layer 223 is equal to or slightly less than that of the black matrix layer 222, so that flatness can be maintained and contrast can be improved. In general, the film thickness of the black matrix layer 222 is from lum to 3um, and the transparent intermediate layer 223 may be from lum to 3 um.
When the display device works, the optical path system generates various kinds of stray light, such as yellow orange light or cyan green light, in order to absorb the yellow orange light or cyan green light in the optical path system, and further improve the color gamut, as shown in fig. 3, light nanoparticles 225 are added in the transparent intermediate layer.
Optionally, the optical nanoparticles include at least one of first optical nanoparticles for absorbing yellow-orange light and second optical nanoparticles for absorbing cyan-green light.
Optionally, the optical nanoparticles include rhodamine derivatives.
Optionally, the optical nanoparticles include a mixed system of metal nanoparticles and rhodamine-based derivative dyes.
Optionally, in order to further reduce reflection, the transparent intermediate layer includes at least two transparent material layers, and the optical refractive index of each transparent material layer increases in a direction from the transparent substrate to the transparent electrode layer.
As shown in fig. 4, the transparent intermediate layer 223 includes two transparent material layers, i.e., a first transparent material layer 2231 and a second transparent material layer 2232, and, at this time, the first transparent material layer 2231 includes one or more of polyethylene (having a refractive index n of 1.50 to 1.54), poly (1, 2-butadiene) (having a refractive index n of 1.51), polyurethane (having a refractive index n of 1.50 to 1.60), polyester resin (having a refractive index n of 1.523 to 1.54), polyvinyl chloride (having a refractive index n of 1.54), poly (2-vinyltetrahydrofuran) (having a refractive index n of 1.55), and polystyrene-styrenitrile (having a refractive index n of 1.56 to 1.57), and the second transparent material layer 2232 includes one or more of polycarbonate (having a refractive index n of 1.60), polystyrene (having a refractive index n of 1.6), and poly (2-vinylthiophene) (having a refractive index n of 1.6376).
Correspondingly, the invention also provides a display device which comprises the display panel provided by the embodiment of the invention.
The embodiment of the invention also provides a manufacturing method for the COA upper substrate, which comprises the following steps:
first, a light-shielding material is coated on a transparent substrate and processed to form a black matrix layer 222.
Specifically, as shown in fig. 3, a light shielding material is coated on a transparent substrate 221 formed of a glass substrate, and then a pattern corresponding to the black matrix layer 222 is formed through exposure, development, and lift-off processes.
Next, a transparent resin doped with photo nanoparticles is deposited on the black matrix layer 222 and the exposed region of the transparent substrate 221, and processed to form a transparent intermediate layer 223.
Specifically, as shown in fig. 3, a transparent resin doped with photo nanoparticles is deposited on the black matrix layer 222 and the exposed region of the transparent substrate 221, and then exposed, developed, and stripped to form a pattern corresponding to the transparent intermediate layer 223.
Next, a transparent conductive material is coated on the black matrix layer 222 and the transparent intermediate layer 223, and processed to form a transparent electrode layer 224.
Specifically, as shown in fig. 3, a layer of ITO transparent conductive material is coated on the black matrix layer 222 and the transparent intermediate layer 223, and a pattern corresponding to the transparent electrode layer 224 is formed through exposure, development, and lift-off processes.
The embodiment of the invention also provides a manufacturing method for the COA upper substrate, which comprises the following steps:
first, a transparent resin doped with photo nanoparticles is deposited on a transparent substrate and processed to form the transparent intermediate layer 223.
Specifically, as shown in fig. 3, a transparent resin doped with photo nanoparticles is deposited on a transparent substrate 221 formed of a glass substrate, and then exposed, developed, and baked to form a pattern corresponding to the transparent interlayer 223.
Next, a light shielding material is coated on the exposed region of the transparent substrate 221, and processed to form a black matrix layer 222.
Specifically, as shown in fig. 3, a light shielding material is coated on a transparent substrate 221 formed of a glass substrate, and then a pattern corresponding to the black matrix layer 222 is formed through exposure, development, and baking processes.
Next, a transparent conductive material is coated on the black matrix layer 222 and the transparent intermediate layer 223, and processed to form a transparent electrode layer 224.
Specifically, as shown in fig. 3, a layer of ITO transparent conductive material is coated on the black matrix layer 222 and the transparent intermediate layer 223, and a pattern corresponding to the transparent electrode layer 224 is formed through exposure, development and baking processes.
Correspondingly, the invention also provides a COA upper substrate obtained based on the method, and the structure of the COA upper substrate is the same as that of the COA upper substrate of the display panel in the embodiment, and is not described again.
According to the above embodiments:
the present invention provides a novel display panel and a display device, wherein the COA upper substrate inside the display panel comprises: a transparent substrate; a black matrix layer disposed on the transparent substrate; a transparent intermediate layer disposed on an exposed region of the transparent substrate; a transparent electrode layer disposed on the black matrix layer and the transparent intermediate layer; the optical refractive index of the transparent intermediate layer is between that of the transparent substrate and that of the transparent electrode layer; therefore, direct contact between the ITO and the glass substrate is avoided, the reflectivity of light rays at the ITO can be well reduced, and the technical problem that the contact position of the ITO and the glass substrate reflects light in the existing display panel is solved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (4)
1. A display panel, comprising: the TFT substrate comprises a TFT lower substrate and a COA upper substrate which is arranged corresponding to the TFT lower substrate; the COA upper substrate comprises:
a transparent substrate;
a black matrix layer disposed on the transparent substrate;
a transparent intermediate layer disposed on an exposed region of the transparent substrate; the transparent intermediate layer is made of transparent resin; the transparent intermediate layer is internally added with light nanoparticles, the light nanoparticles are used for absorbing stray light generated by an optical path system when the display panel works, and the light nanoparticles comprise at least one of first light nanoparticles used for absorbing yellow-orange light in the stray light and second light nanoparticles used for absorbing cyan-green light in the stray light; the optical nanoparticles comprise a rhodamine derivative or a mixed system of metal nanoparticles and rhodamine derivative dyes;
a transparent electrode layer disposed on the black matrix layer and the transparent intermediate layer;
the optical refractive index of the transparent intermediate layer is between that of the transparent substrate and that of the transparent electrode layer, the transparent intermediate layer comprises at least two transparent material layers, and the optical refractive index of each transparent material layer increases progressively in the direction from the transparent substrate to the transparent electrode layer.
2. The display panel according to claim 1, wherein the thickness of the transparent intermediate layer is equal to the thickness of the black matrix layer.
3. The display panel of claim 1, wherein the transparent resin comprises at least one of poly (1, 2-butadiene), poly (2-vinyltetrahydrofuran), poly (2-vinylthiophene), polycarbonate, polyester resin, polyethylene, polystyrene-styrenitrile, polyurethane, and polyvinyl chloride.
4. A display device characterized by comprising the display panel according to any one of claims 1 to 3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133635.3A CN109164628B (en) | 2018-09-27 | 2018-09-27 | Display panel and display device |
| PCT/CN2018/113283 WO2020062418A1 (en) | 2018-09-27 | 2018-11-01 | Coa upper substrate, display panel and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133635.3A CN109164628B (en) | 2018-09-27 | 2018-09-27 | Display panel and display device |
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| Publication Number | Publication Date |
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| CN109164628A CN109164628A (en) | 2019-01-08 |
| CN109164628B true CN109164628B (en) | 2020-04-28 |
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| WO (1) | WO2020062418A1 (en) |
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| CN109683370B (en) * | 2019-01-28 | 2021-04-27 | Tcl华星光电技术有限公司 | Liquid crystal display |
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| JP6050985B2 (en) * | 2012-08-23 | 2016-12-21 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| CN104597657B (en) * | 2015-02-28 | 2018-01-05 | 合肥京东方光电科技有限公司 | Color membrane substrates and preparation method thereof, display device and preparation method thereof |
| CN104656325B (en) * | 2015-03-18 | 2017-06-27 | 深圳市华星光电技术有限公司 | The preparation method and COA type liquid crystal panels of COA type liquid crystal panels |
| CN107797332A (en) * | 2017-11-22 | 2018-03-13 | 深圳市华星光电技术有限公司 | A kind of liquid crystal display panel and liquid crystal display device |
| CN107728373B (en) * | 2017-11-22 | 2019-05-03 | 深圳市华星光电技术有限公司 | A kind of color membrane substrates and its manufacturing method, liquid crystal display panel |
| CN108318950B (en) * | 2018-03-01 | 2020-09-04 | 深圳市华星光电技术有限公司 | Backlight module and diffusion sheet thereof |
| CN108508648B (en) * | 2018-04-04 | 2020-01-17 | 深圳市华星光电技术有限公司 | Liquid crystal panel and manufacturing method thereof |
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| WO2020062418A1 (en) | 2020-04-02 |
| CN109164628A (en) | 2019-01-08 |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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