WO2017020339A1 - 一种液晶显示面板及其制造方法 - Google Patents

一种液晶显示面板及其制造方法 Download PDF

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Publication number
WO2017020339A1
WO2017020339A1 PCT/CN2015/086833 CN2015086833W WO2017020339A1 WO 2017020339 A1 WO2017020339 A1 WO 2017020339A1 CN 2015086833 W CN2015086833 W CN 2015086833W WO 2017020339 A1 WO2017020339 A1 WO 2017020339A1
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Prior art keywords
liquid crystal
glass plate
quantum dot
display panel
layer
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Ceased
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PCT/CN2015/086833
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English (en)
French (fr)
Inventor
陈兴武
马小龙
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/897,473 priority Critical patent/US20180157105A1/en
Publication of WO2017020339A1 publication Critical patent/WO2017020339A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02F1/133514—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
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • 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
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • 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
    • G02F1/133354—Arrangements for aligning or assembling substrates
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display panel and a method of fabricating the same.
  • Liquid crystal display technology has become the most widely used display technology in the current application. High color gamut and high brightness have become the main direction of current display technology development.
  • OLED organic light-emitting diode
  • Quantum dots also known as nanocrystals, consist of nanoparticles with particle sizes ranging from 1-20 nm. Since the electrons and holes are quantum confined, the band structure of the quantum dots is divided into independent energy level structures, so that fluorescence can be emitted after being excited.
  • the emission spectrum of a quantum dot is mainly controlled by the particle size of the quantum dot, so that the adjustment of the emission spectrum can be achieved by changing the particle size of the quantum dot.
  • the quantum dot has a high light conversion efficiency, which can improve the utilization of light.
  • the quantum dot material changes the polarization state of the light, and directly applying it to the liquid crystal panel in the prior art affects the utilization of light.
  • the present invention proposes a quantum dot solution Crystal display panel and its preparation method.
  • the liquid crystal display panel of the present invention has a liquid crystal cell and a color film substrate, wherein the liquid crystal cell includes a first glass plate, a second glass plate, and is disposed between the first glass plate and the second glass plate a liquid crystal interlayer, wherein the first glass plate is provided with a thin film transistor array, and the color film substrate is adhered to a side of the second glass plate facing away from the liquid crystal interlayer by a pressure bonding layer.
  • the color filter substrate comprises: a third glass plate; a red quantum dot layer, a green quantum dot disposed on a side of the third glass plate facing the liquid crystal cell, which are alternately arranged corresponding to at least one pixel; a layer and a blue quantum dot layer; and a black matrix disposed between the red quantum dot layer, the green quantum dot layer, and the blue quantum dot layer and the third glass plate, the black matrix being located in the red quantum The joint of the point layer, the green quantum dot layer, and the blue quantum dot layer.
  • the red quantum dot layer can be excited to emit red light
  • the green quantum dot layer can be excited to emit green light
  • the blue quantum dot layer can be excited to emit blue light.
  • the quantum dot layers of the three primary colors cooperate to perform the "coloring" function of the color filter substrate.
  • the material of the pressure bonding layer comprises a urethane pressure sensitive adhesive, an acrylic pressure sensitive adhesive, a rubber pressure adhesive, a polyvinyl ether pressure adhesive, a polyisobutylene pressure adhesive, and an epoxy pressure sensitive adhesive.
  • a urethane pressure sensitive adhesive an acrylic pressure sensitive adhesive, a rubber pressure adhesive, a polyvinyl ether pressure adhesive, a polyisobutylene pressure adhesive, and an epoxy pressure sensitive adhesive.
  • an adhesive a phenolic pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, and a polyester pressure-sensitive adhesive.
  • the rubber-like pressure-sensitive adhesive includes styrene-butadiene rubber and/or styrene-butadiene rubber.
  • the pressure-bonding layer is formed on the side of the color filter substrate facing the liquid crystal cell by spin coating, slit coating or inkjet printing.
  • the arrangement of the pressure-fitting layer is very flexible.
  • the material selection of the pressure bonding layer is very diverse, and the coating method of the pressure bonding layer is also very diverse. Therefore, one of the core improvements of the present invention - the setting of the pressure bonding layer - has little restriction on the process, and does not greatly increase the difficulty or the cost of the liquid crystal panel process.
  • the quantum dots of the red quantum dot layer, the green quantum dot layer, and the blue quantum dot layer pass
  • the material is formed of one or a mixture of two or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X represents S, Se or Te.
  • the arrangement of the quantum dot layer (i.e., the red quantum dot layer, the green quantum dot layer, and the blue quantum dot layer described above) is also very flexible.
  • the material selection of the quantum dot layer is very diverse, and does not significantly increase the difficulty or the cost of the liquid crystal panel process.
  • the present invention also provides a method for manufacturing a liquid crystal display panel, which is the liquid crystal display panel proposed above.
  • the method includes:
  • the color film substrate is attached to the side of the second glass plate of the liquid crystal cell facing away from the liquid crystal interlayer through a pressure bonding layer.
  • the first glass plate and the second glass plate are prepared, the electrode layer and the first liquid crystal alignment layer are disposed on the first glass plate, and the second liquid crystal alignment layer is disposed on the second glass plate.
  • a spacer for maintaining a thickness of the liquid crystal interlayer, combining the first glass plate and the second glass plate, and combining one of the first glass plate and the second glass plate facing away from the liquid crystal interlayer Polarizers are provided on both sides.
  • alternately arranged red quantum dot layers, green quantum dot layers, and blue quantum dot layers are disposed on the third glass plate, and in the red quantum dot layer, the green quantum A black matrix is placed at the seam of the dot layer and the blue quantum dot layer.
  • the pressure bonding layer is formed on a side of the color filter substrate facing the liquid crystal cell by spin coating, slit coating or ink jet printing.
  • the liquid crystal display panel and the method of manufacturing the same according to the present invention can effectively improve the color gamut and light utilization efficiency of the liquid crystal display.
  • FIG. 1 is a view schematically showing a color filter substrate of a liquid crystal display panel according to the present invention in one embodiment (corresponding to one pixel unit);
  • Figure 2 is a view schematically showing a liquid crystal cell (corresponding to one pixel unit) of a liquid crystal display panel according to the present invention in one embodiment
  • Fig. 3 schematically shows a liquid crystal display panel (corresponding to a pixel unit) according to the present invention in one embodiment, the liquid crystal display panel having a color filter substrate and a liquid crystal cell which are bonded together by a pressure-bonding layer.
  • the invention proposes a liquid crystal display panel.
  • the liquid crystal display panel has a liquid crystal cell and a color film substrate.
  • Fig. 1 schematically shows a color filter substrate (corresponding to one pixel unit) of a liquid crystal display panel according to the present invention in one embodiment.
  • the color filter substrate comprises a third glass sheet 1.
  • a quantum dot layer 2 is provided on the third glass plate 1.
  • the quantum dot layer 2 includes a red quantum dot layer 2.1, a green quantum dot layer 2.2, and a blue quantum dot layer 2.3 which are alternately arranged.
  • the red quantum dot layer 2.1 can be excited to emit red light
  • the green quantum dot layer 2.2 can be excited to emit green light
  • the blue quantum dot layer 2.3 can be excited to emit blue light.
  • the red quantum dot layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3 respectively correspond to one sub-pixel, and at least one sub-pixel corresponding to three colors of red, green, and blue is included in one pixel unit.
  • the pattern arrangement of the red quantum dot layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3 can be achieved by including a photoresist (negative photoresist).
  • a black matrix 11 is disposed between the red quantum dot layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3 and the third glass plate 1.
  • the black matrix 11 is located at the seam of the red quantum dot layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3.
  • the black matrix 11 can be used to block light leakage and ensure display quality.
  • the quantum dots in the quantum dot layer 2 can be formed by the following materials: CdX, PbX, ZnX, HgX, GaX, InX One or a mixture of two or more, wherein X represents S, Se or Te.
  • the liquid crystal cell includes a first glass plate 9, a second glass plate 5, and a liquid crystal interlayer 7 disposed between the first glass plate 9 and the second glass plate 5.
  • An array of thin film transistors is disposed on the first glass plate 9 (since the specific structure of the thin film transistor array does not relate to the modified core of the present invention, not shown in the drawing).
  • An alignment film 8 is provided on a side of the first glass plate 9 facing the liquid crystal interlayer 7, and an alignment film 6 is provided on a side of the second glass plate 5 facing the liquid crystal interlayer 7.
  • the alignment film 8 and the alignment film 6 are used to perform positioning of the liquid crystal pretilt angle of the liquid crystal interlayer 7.
  • a first polarizer 10 is disposed on a side of the first glass plate 9 remote from the liquid crystal interlayer 7, and a second polarizer 4 is disposed on a side of the second glass plate 5 remote from the liquid crystal interlayer 7.
  • the first polarizer 10 is for generating linearly polarized light, the polarization direction of the linearly polarized light is changed after passing through the liquid crystal interlayer 7, and the second polarizer 4 is for filtering the polarization direction of the light to select a suitable light intensity.
  • FIG. 3 shows a liquid crystal display panel (corresponding to one pixel unit) according to the present invention in one embodiment, the liquid crystal display panel having the color filter substrate shown in FIG. 1 bonded together by a pressure bonding layer 3 and The liquid crystal cell shown in Fig. 2.
  • Fig. 3 it can be clearly seen that the color filter substrate is bonded to the side of the second glass sheet 5 facing away from the liquid crystal interlayer 7 by the pressure bonding layer 3.
  • the material of the pressure bonding layer 3 may include a urethane viscous adhesive, an acrylic viscous adhesive, and a rubber sensitizing adhesive (the rubber viscous adhesive may include, for example, styrene butadiene rubber and/or styrene-butadiene).
  • the rubber viscous adhesive may include, for example, styrene butadiene rubber and/or styrene-butadiene).
  • One or two of rubber polyvinyl ether pressure adhesive, polyisobutylene pressure adhesive, epoxy pressure adhesive, phenolic pressure sensitive adhesive, silicone pressure adhesive, polyester pressure sensitive adhesive More than one mixture.
  • the pressure bonding layer 3 can be formed into the quantum dot layer 2 of the color filter substrate by spin coating, slot coating or inkjet printing (ie, red quantum The side layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3) face the side of the liquid crystal cell.
  • the present invention also proposes a method for manufacturing a liquid crystal display panel according to the present invention.
  • the method includes:
  • Step 1 A liquid crystal cell as shown in Fig. 2 was produced.
  • the liquid crystal cell includes a first glass plate 9, a second glass plate 5, and a liquid crystal interlayer 7 disposed between the first glass plate 9 and the second glass plate 5.
  • a thin film transistor array is disposed on the first glass plate 9.
  • first glass plate 9 and second glass plate 5 are first prepared.
  • An electrode layer (not shown) for constituting the thin film transistor array and a first liquid crystal alignment layer 8 (i.e., an alignment film) are provided on the first glass plate 9.
  • the first glass plate 9 and the second glass plate 5 are combined, and after being combined, the polarizing plate 10 and the polarizing plate 4 are respectively disposed on the sides of the first glass plate 9 and the second glass plate 5 facing away from the liquid crystal interlayer 7.
  • Step 2 A color film substrate as shown in Fig. 1 was produced.
  • alternately arranged red quantum dot layers 2.1, green quantum dot layers 2.2, and blue quantum dot layers 2.3 are disposed on the third glass plate 1.
  • the pattern arrangement of the red quantum dot layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3 can be achieved by including a photoresist (negative photoresist).
  • a black matrix 11 is disposed at the joint of the red quantum dot layer 2.1, the green quantum dot layer 2.2, and the blue quantum dot layer 2.3. The black matrix 11 is located between the third glass plate 1 and the quantum dot layer 2 for blocking light leakage.
  • Step 3 The color film substrate is attached to the side of the second glass plate 5 of the liquid crystal cell facing away from the liquid crystal interlayer 7 (upper side in FIG. 3) through the pressure bonding layer 3, and a complete liquid crystal display panel can be obtained after bonding.
  • the pressure-fitting layer 3 may be formed on the side of the color filter substrate facing the liquid crystal cell by spin coating, slit coating or ink jet printing.
  • step 1 and step 2 above may be reversed.
  • the invention provides a high color gamut and high brightness liquid crystal display panel and a preparation method thereof.
  • the liquid crystal display panel according to the present invention can effectively improve the backlight utilization rate and increase the color gamut of the display device. The specific reasons are as follows:
  • the liquid crystal display panel according to the present invention utilizes a quantum dot structure.
  • Quantum dots also known as nanocrystals, consist of nanoparticles with a particle size between 1 and 20 nm. Since in the quantum dot material, electrons and holes are quantum confined, the band structure of the quantum dot material is divided into independent energy level structures, so that fluorescence can be emitted after being excited.
  • the emission spectrum of a quantum dot is mainly controlled by the particle size of the quantum dot, so that the emission spectrum can be adjusted by changing the particle size of the quantum dot.
  • the quantum dot structure has high light conversion efficiency and can improve the utilization of light.
  • the emission spectrum of a quantum dot has a narrow half-wave width and good temperature stability.
  • quantum dot structures are used as luminescent materials. They adopt the standards of the National Television Standard Committee (NTSC), and their color gamut can be greater than 100%.
  • NTSC National Television Standard Committee
  • the liquid crystal display panel on the market is only about 70. %, it can be seen that the color gamut of the liquid crystal display panel according to the present invention is at least 30% higher than that of the display panel of the prior art.
  • quantum dot materials primarily achieve luminescence through photoluminescence processes. If the quantum dot material is placed inside the liquid crystal cell, the polarization state of the light is changed; if the polarizing plate is added downstream of the quantum dot material, the light conversion efficiency is lowered.
  • the pressure bonding layer is skillfully used, and the color filter substrate formed of the quantum dot layer is disposed outside the polarizing plate 4, avoiding the above-mentioned "difficulty in the left and right". In this way, not only the efficiency of light conversion is effectively improved, but also the difficulty of the process is reduced.

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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)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Optical Filters (AREA)

Abstract

一种量子点液晶显示面板和其制备方法，该液晶显示面板具有液晶盒和彩膜基板，其中，所述液晶盒包括第一玻璃板（9）、第二玻璃板（5）和设置于所述第一玻璃板（9）和所述第二玻璃板（5）之间的液晶夹层（7），所述第一玻璃板（9）上设置有薄膜晶体管阵列，所述彩膜基板通过压力贴合层（3）贴合到所述第二玻璃板（5）的背离所述液晶夹层（7）的一侧。上述液晶显示面板及其制造方法能够有效地改善液晶显示器的色域及光利用率。

Description

一种液晶显示面板及其制造方法
相关申请的交叉引用
本申请要求享有于2015年8月5日提交的名称为“一种液晶显示面板及其制造方法”的中国专利申请CN201510473593.8的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示面板及其制造方法。
背景技术
随着显示技术的快速发展，人们对显示技术的要求也越来越高。液晶显示技术已经成为了目前应用范围最广泛的显示技术。高色域和高亮度成为目前显示技术发展的主要方向。
为了提高显示面板的色域及亮度，有机发光二级管(Organic Light-Emitting Diode，OLED)显示技术也随之兴起。然而有机发光二级管(Organic Light-Emitting Diode，OLED)模式的显示器的制作良率很低，使用寿命有限。这些问题一直难以解决，所以大部分面板厂商都对其持观望态度。
另外一种高色域显示技术为量子点(Quantum Dots,QD)液晶显示模式。量子点又称为纳米晶，由粒径范围介于1-20nm之间的纳米颗粒组成。由于电子和空穴被量子限域，量子点的能带结构被分割成独立的能级结构，因此受激后可以发射荧光。量子点的发射光谱主要通过量子点的粒径大小来控制，因此可以通过改变量子点的粒径来实现发射光谱的调节。同时，量子点的光转换效率很高，可以提高光的利用率。但量子点材料会改变光的偏振状态，直接将其应用到现有技术中的液晶面板会影响光的利用率。
发明内容
为提高量子点模式的液晶显示面板的光利用率，本发明提出了一种量子点液 晶显示面板和其制备方法。
本发明所提出的液晶显示面板具有液晶盒和彩膜基板，其中，所述液晶盒包括第一玻璃板、第二玻璃板和设置于所述第一玻璃板和所述第二玻璃板之间的液晶夹层，所述第一玻璃板上设置有薄膜晶体管阵列，所述彩膜基板通过压力贴合层贴合到所述第二玻璃板的背离所述液晶夹层的一侧。
优选地，所述彩膜基板包括：第三玻璃板；对应着至少一个像素而相互交错地设置在所述第三玻璃板的朝向所述液晶盒的一侧的红色量子点层、绿色量子点层以及蓝色量子点层；以及设置在所述红色量子点层、绿色量子点层以及蓝色量子点层和所述第三玻璃板之间的黑色矩阵，所述黑色矩阵位于所述红色量子点层、绿色量子点层以及蓝色量子点层的接缝处。
其中红色量子点层可以受激发出红光、绿色量子点层可以受激发出绿光，蓝色量子点层可以受激发出蓝光。在一个像素单元中，三原色的量子点层协作，能够发挥彩膜基板的“上色”功能。
目前的量子点材料主要通过光致发光过程来实现发光。如果将量子点材料设置到液晶盒的内部，会改变光的偏振状态；如果在量子点材料的下游增加偏振片，则又会降低光的转换效率。而在根据本发明的液晶显示面板中，巧妙地利用了压力贴合层，将通过量子点材料层构成的彩膜基板设置在液晶盒的外侧，避开了上述“左右为难”的情况。这样一来，不仅有效提高了光的转换效率，同时也降低了制程的难度。
优选地，所述压力贴合层的材料包括氨酯感压黏剂、丙烯酸感压黏剂、橡胶感压黏剂、聚乙烯醚感压黏剂、聚异丁烯感压黏剂、环氧感压黏剂、酚类感压黏剂、硅感压黏剂、聚酯感压黏剂中的一种或两种以上的混合物。具体地，所述橡胶感压黏剂包括丁苯橡胶和/或苯乙烯-丁二烯橡胶。
优选地，所述压力贴合层通过旋转涂布、狭缝式涂布或喷墨打印的方式形成到所述彩膜基板的朝向所述液晶盒的一侧上。
由此可见，在本发明所提出的优选方案中，压力贴合层的设置是非常灵活的。压力贴合层的材料选择十分多样化，压力贴合层的涂布方式选择也十分多样化。因此，本发明的核心改进之一——压力贴合层的设置——对工艺制程的限制很小，不会大幅度增加液晶面板工艺制程的难度或金钱成本。
优选地，所述红色量子点层、绿色量子点层以及蓝色量子点层的量子点通过 下述材料形成，所述材料包括CdX、PbX、ZnX、HgX、GaX、InX中的一种或两种以上的混合物，其中X表示S、Se或Te。
由此可见，在本发明所提出的优选方案中，量子点层(即上述红色量子点层、绿色量子点层和蓝色量子点层)的设置也是非常灵活的。量子点层的材料选择十分多样化，不会大幅度增加液晶面板工艺制程的难度或金钱成本。
本发明还提出了一种用于制造液晶显示面板的方法，所述液晶显示面板为上面所提出的液晶显示面板，
所述方法包括：
制作液晶盒；
制作彩膜基板；以及
将所述彩膜基板通过压力贴合层贴合到所述液晶盒的第二玻璃板的背离所述液晶夹层的一侧。
优选地，在制作液晶盒的过程中：制备第一玻璃板和第二玻璃板，在第一玻璃板上设置电极层及第一液晶配向层，在第二玻璃板上设置第二液晶配向层和用于保持液晶夹层厚度的间隔柱，将所述第一玻璃板和所述第二玻璃板进行组合，组合后在所述第一玻璃板和所述第二玻璃板的背离液晶夹层的一侧均设置偏光片。
优选地，在制作彩膜基板的过程中，在第三玻璃板上设置交替排布的红色量子点层、绿色量子点层以及蓝色量子点层，并且在所述红色量子点层、绿色量子点层以及蓝色量子点层的接缝处设置黑色矩阵。
优选地，通过旋转涂布、狭缝式涂布或喷墨打印的方式在所述彩膜基板的朝向所述液晶盒的一侧上形成所述压力贴合层。
根据本发明的液晶显示面板及其制造方法能够有效地改善液晶显示器的色域及光利用率。
上述技术特征可以各种适合的方式组合或由等效的技术特征来替代，只要能够达到本发明的目的。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1示意性显示了在一个实施例中的根据本发明的液晶显示面板的彩膜基板 (对应一个像素单元)；
图2示意性显示了在一个实施例中的根据本发明的液晶显示面板的液晶盒(对应一个像素单元)；
图3示意性显示了在一个实施例中的根据本发明的液晶显示面板(对应一个像素单元)，所述液晶显示面板具有通过压力贴合层贴合到一起的彩膜基板和液晶盒。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例。
具体实施方式
下面将结合附图对本发明作进一步说明。
本发明提出了一种液晶显示面板。所述液晶显示面板具有液晶盒和彩膜基板。
图1示意性显示了在一个实施例中的根据本发明的液晶显示面板的彩膜基板(对应一个像素单元)。参照图1，可清楚地看出，所述彩膜基板包括第三玻璃板1。
在第三玻璃板1上设置有量子点层2。具体地，量子点层2包括相互交错地设置的红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3。红色量子点层2.1能够受激发出红光，绿色量子点层2.2能够受激发出绿光，蓝色量子点层2.3能够受激发出蓝光。红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3分别对应一个子像素，而在一个像素单元中至少包括分别与红、绿、蓝三种颜色所对应的子像素。红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3的图案排布可以通过使其含有光致抗蚀剂(负性光刻胶)来实现。
在红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3和所述第三玻璃板1之间设置有黑色矩阵11。黑色矩阵11位于红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3的接缝处。黑色矩阵11可以用来阻挡漏光，保证显示品质。
量子点层2(即红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3)中的量子点可以通过下述材料来形成：CdX、PbX、ZnX、HgX、GaX、InX中的一种或两种以上的混合物，其中X表示S、Se或Te。
图2示意性显示了在一个实施例中的根据本发明的液晶显示面板的液晶盒 (对应一个像素单元)。参照图2，可清楚地看出，该液晶盒包括第一玻璃板9、第二玻璃板5和设置于第一玻璃板9和第二玻璃板5之间的液晶夹层7。
第一玻璃板9上设置有薄膜晶体管的阵列(由于薄膜晶体管阵列的具体结构并不涉及本发明的改进核心，图中未示出)。
在第一玻璃板9的朝向液晶夹层7的一侧设置有配向膜8，在第二玻璃板5的朝向液晶夹层7的一侧设置有配向膜6。配向膜8和配向膜6用于进行液晶夹层7的液晶预倾角的定位。
在第一玻璃板9的远离液晶夹层7的一侧设置有第一偏光片10，在第二玻璃板5的远离液晶夹层7的一侧设置有第二偏光片4。第一偏光片10用于产生线偏振光，线偏振光经过液晶夹层7后偏振方向发生改变，第二偏光片4用于过滤光的偏振方向，以选择适合的光强度。
图3显示了在一个实施例中的根据本发明的液晶显示面板(对应一个像素单元)，所述液晶显示面板具有通过压力贴合层3贴合到一起的图1所示的彩膜基板和图2所示的液晶盒。在图3中，可清楚地看出，彩膜基板通过压力贴合层3贴合到第二玻璃板5的背离液晶夹层7的一侧。
压力贴合层3的材料可以包括氨酯感压黏剂、丙烯酸感压黏剂、橡胶感压黏剂(所述橡胶感压黏剂例如可以包括丁苯橡胶和/或苯乙烯-丁二烯橡胶)、聚乙烯醚感压黏剂、聚异丁烯感压黏剂、环氧感压黏剂、酚类感压黏剂、硅感压黏剂、聚酯感压黏剂中的一种或两种以上的混合物。
压力贴合层3可以通过旋转涂布(spin coating)、狭缝式涂布(slot coating)或喷墨打印(inkjet printing)的方式形成到所述彩膜基板的量子点层2(即红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3)的朝向所述液晶盒的一侧上。
本发明还提出了一种用于制造根据本发明的液晶显示面板的方法。所述方法包括：
步骤1：制作如图2所示的液晶盒。所述液晶盒包括第一玻璃板9、第二玻璃板5和设置于第一玻璃板9和第二玻璃板5之间的液晶夹层7。第一玻璃板9上设置有薄膜晶体管阵列。
在一个实施例中，在制作该液晶盒的过程中：首先制备第一玻璃板9和第二玻璃板5。在第一玻璃板9上设置用于构成薄膜晶体管阵列的电极层(图中未示出)及第一液晶配向层8(即配向膜)。在第二玻璃板5上设置第二液晶配向层 6(即配向膜)和用于保持液晶夹层厚度的间隔柱(图中未示出)。
随后，将第一玻璃板9和第二玻璃板5进行组合，组合后在第一玻璃板9和第二玻璃板5的背离液晶夹层7的一侧分别设置偏光片10和偏光片4。
步骤2：制作如图1所示的彩膜基板。
在一个实施例中，在制作彩膜基板的过程中：在第三玻璃板1上设置交替排布的红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3。红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3的图案排布可以通过使其含有光致抗蚀剂(负性光刻胶)来实现。在红色量子点层2.1、绿色量子点层2.2以及蓝色量子点层2.3的接缝处设置黑色矩阵11。黑色矩阵11位于第三玻璃板1和量子点层2之间，用于阻挡漏光。
步骤3：将彩膜基板通过压力贴合层3贴合到液晶盒的第二玻璃板5的背离液晶夹层7一侧(图3中的上侧)，贴合后可获得完整的液晶显示面板。具体地，可以通过旋转涂布、狭缝式涂布或喷墨打印的方式在彩膜基板的朝向液晶盒的一侧上形成压力贴合层3。
当然，容易理解，在另一个实施方式中，上述步骤1和步骤2的步骤可以调换。
本发明提供了一种高色域及高亮度的液晶显示面板及其制备方法。根据本发明的液晶显示面板可有效提高背光利用率及提高显示装置的色域。具体原因如下：
根据本发明的液晶显示面板利用了量子点结构。量子点又称为纳米晶，由粒径介于1-20nm之间的纳米颗粒组成。由于在量子点材料中，电子和空穴被量子限域，量子点材料的能带结构被分割为独立的能级结构，因此受激后可以发射荧光。量子点的发射光谱主要由量子点的粒径大小来控制，因此可以通过改变量子点的粒径来实现发射光谱的调节。同时，量子点结构的光转换效率很高，可以提高光的利用率。
另一方面，量子点的发射光谱半波宽很窄，温度稳定性好。与颜料或者荧光粉相比，量子点结构作为发光材料，采用美国电视标准委员会(National Television Standard Committee,NTSC)的标准，其色域可大于100％，目前市场上的液晶显示面板仅为约70％，可见根据本发明的液晶显示面板的色域相比现有技术中的显示面板至少可高30％。
更重要地，目前的量子点材料主要通过光致发光过程来实现发光。如果将量子点材料设置到液晶盒的内部，会改变光的偏振状态；如果在量子点材料的下游增加偏振片，则又会降低光的转换效率。而在根据本发明的液晶显示面板中，巧妙地利用了压力贴合层，将通过量子点层构成的彩膜基板设置在偏振片4的外侧，避开了上述“左右为难”的情况。这样一来，不仅有效提高了光的转换效率，同时也降低了制程的难度。
虽然在本文中参照了特定的实施方式来描述本发明，但是应该理解的是，这些实施例仅仅是本发明的原理和应用的示例。因此应该理解的是，可以对示例性的实施例进行许多修改，并且可以设计出其他的布置，只要不偏离所附权利要求所限定的本发明的精神和范围。应该理解的是，可以通过不同于原始权利要求所描述的方式来结合不同的从属权利要求和本文中所述的特征。还可以理解的是，结合单独实施例所描述的特征可以使用在其他所述实施例中。

Claims (10)

  1. 一种液晶显示面板，其中，所述液晶显示面板具有液晶盒和彩膜基板，
    其中，所述液晶盒包括第一玻璃板、第二玻璃板和设置于所述第一玻璃板和所述第二玻璃板之间的液晶夹层，所述第一玻璃板上设置有薄膜晶体管阵列，
    所述彩膜基板通过压力贴合层贴合到所述第二玻璃板的背离所述液晶夹层的一侧。
  2. 根据权利要求1所述的液晶显示面板，其中，所述彩膜基板包括：
    第三玻璃板；
    对应着至少一个像素而相互交错地设置在所述第三玻璃板的朝向所述液晶盒的一侧的红色量子点层、绿色量子点层以及蓝色量子点层；以及
    设置在所述红色量子点层、绿色量子点层以及蓝色量子点层和所述第三玻璃板之间的黑色矩阵，所述黑色矩阵位于所述红色量子点层、绿色量子点层以及蓝色量子点层的接缝处。
  3. 根据权利要求1所述的液晶显示面板，其中，所述压力贴合层的材料包括氨酯感压黏剂、丙烯酸感压黏剂、橡胶感压黏剂、聚乙烯醚感压黏剂、聚异丁烯感压黏剂、环氧感压黏剂、酚类感压黏剂、硅感压黏剂、聚酯感压黏剂中的一种或两种以上的混合物。
  4. 根据权利要求3所述的液晶显示面板，其中，所述橡胶感压黏剂包括丁苯橡胶和/或苯乙烯-丁二烯橡胶。
  5. 根据权利要求1所述的液晶显示面板，其中，所述压力贴合层通过旋转涂布、狭缝式涂布或喷墨打印的方式形成到所述彩膜基板的朝向所述液晶盒的一侧上。
  6. 根据权利要求2所述的液晶显示面板，其中，所述红色量子点层、绿色量子点层以及蓝色量子点层的量子点通过下述材料形成，所述材料包括CdX、PbX、ZnX、HgX、GaX、InX中的一种或两种以上的混合物，其中X表示S、Se或Te。
  7. 一种用于制造液晶显示面板的方法，其中，
    所述液晶显示面板具有液晶盒和彩膜基板，其中，所述液晶盒包括第一玻璃板、第二玻璃板和设置于所述第一玻璃板和所述第二玻璃板之间的液晶夹层，所述第一玻璃板上设置有薄膜晶体管阵列，所述彩膜基板通过压力贴合层贴合到所 述第二玻璃板的背离所述液晶夹层的一侧，
    所述方法包括：
    制作液晶盒；
    制作彩膜基板；以及
    将所述彩膜基板通过压力贴合层贴合到所述液晶盒的第二玻璃板的背离所述液晶夹层的一侧。
  8. 根据权利要求7所述的方法，其中，在制作液晶盒的过程中：
    制备第一玻璃板和第二玻璃板，在第一玻璃板上设置电极层及第一液晶配向层，在第二玻璃板上设置第二液晶配向层和用于保持液晶夹层厚度的间隔柱，
    将所述第一玻璃板和所述第二玻璃板进行组合，组合后在所述第一玻璃板和所述第二玻璃板的背离液晶夹层的一侧均设置偏光片。
  9. 根据权利要求7所述的方法，其中，在制作彩膜基板的过程中，在第三玻璃板上设置交替排布的红色量子点层、绿色量子点层以及蓝色量子点层，并且在所述红色量子点层、绿色量子点层以及蓝色量子点层的接缝处设置黑色矩阵。
  10. 根据权利要求7所述的方法，其中，通过旋转涂布、狭缝式涂布或喷墨打印的方式在所述彩膜基板的朝向所述液晶盒的一侧上形成所述压力贴合层。
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