WO2015100825A1 - 液晶显示面板及用于制造液晶显示面板的方法 - Google Patents

液晶显示面板及用于制造液晶显示面板的方法 Download PDF

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Publication number
WO2015100825A1
WO2015100825A1 PCT/CN2014/071267 CN2014071267W WO2015100825A1 WO 2015100825 A1 WO2015100825 A1 WO 2015100825A1 CN 2014071267 W CN2014071267 W CN 2014071267W WO 2015100825 A1 WO2015100825 A1 WO 2015100825A1
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WO
WIPO (PCT)
Prior art keywords
film layer
phase retardation
retardation film
polarizing film
liquid crystal
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PCT/CN2014/071267
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English (en)
French (fr)
Inventor
赵勇
欧阳礼仁
刘娟
张永吉
Original Assignee
深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/241,404 priority Critical patent/US20150185554A1/en
Publication of WO2015100825A1 publication Critical patent/WO2015100825A1/zh

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Classifications

    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G02F1/133528—Polarisers
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133635—Multifunctional compensators
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/01—Number of plates being 1

Definitions

  • Liquid crystal display panel and method for manufacturing liquid crystal display panel are Liquid crystal display panel and method for manufacturing liquid crystal display panel
  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display panel and a method for manufacturing the liquid crystal display panel. Background technique
  • the linear polarization of the liquid crystal television is compared: the degree of influence of light and circularly polarized light on visual fatigue.
  • 64 normal people were randomly divided into two groups, 32 in each group, and watched the feature film played by liquid crystal TVs emitting linearly polarized light or circularly polarized light for 125 minutes.
  • Use the electrooculogram (EOG) to record the blinking frequency before and after watching the feature film and watching the feature film, and analyze the change characteristics of the blink frequency.
  • the frequency of blinking after viewing the feature film in the linearly polarized group was higher than that before viewing. The difference was statistically significant ( ⁇ 0.01) .
  • There was no statistically significant difference in the frequency of the blinks before and after viewing the feature film in the circularly polarized group ( ⁇ >0.05). .
  • the paper concludes that a liquid crystal television that emits linearly polarized light in a long period of time tends to cause visual fatigue when the emitted light is circularly polarized.
  • the display device can be modified to give a circularly polarized light that is more comfortable to the eye, it will bring about considerable progress.
  • the /4 wave plate is an optical sheet that produces and examines circularly polarized or elliptically polarized light.
  • a parallel beam is placed normally, and the beam is transmitted straight through the wave plate.
  • the two features on the transverse plane vibrate E.
  • the propagation speeds of (t) and E e (t) are V, respectively. And Ve .
  • the optical path L. And: L e is not equal. In other words, pass the wave plate, E.
  • a phase difference is created between (t) and E e (t), which causes a phase delay.
  • Fig. 1 shows a liquid crystal display panel which finally emits circularly polarized light in the prior art.
  • the panel includes an array substrate, a color filter substrate 2, and a liquid crystal interlayer 3 between the array substrate and the color filter substrate 2.
  • the front polarized light is disposed on a side of the color filter substrate 2 away from the liquid crystal interlayer 3. ⁇ 4
  • a rear polarizer 5 is disposed on a side of the array substrate 1 away from the liquid crystal interlayer 3, wherein a quarter-wavelength plate 6 is disposed on a side of the front polarizer 4 away from the liquid crystal interlayer 3, for Line from front polarizer 4 Polarization: Light is converted into circularly polarized light.
  • the quarter-wave plate 6 is bonded to the front polarizer 4 through the adhesive layer 7.
  • the material of the quarter-wave plate 6 is a cycloolefin polymer (COP) or a polycarbonate (PC).
  • the liquid crystal display device In consideration of the practical application of the liquid crystal display device, functions such as anti-halation and anti-reflection are also required. Therefore, in addition to the quarter-wavelength wave i ⁇ 6, an anti-glare layer 8, an anti-reflection layer 9, and the like are bonded. If a physical scratch-proof function is to be provided, an anti-scratch film not shown in Fig. i is added. As can be seen in the enlarged portion of FIG. 1, in the liquid crystal display device of the prior art, the front side of the front polarizer 4 is provided with at least four layered structures (if the anti-scratch function is included, an additional design is required. At least five layered structures).
  • the quarter-wave plate made of cycloolefin polymer (COP) or polycarbonate (PC) has many layers and a large thickness, which is disadvantageous for the liquid crystal panel to be thinner, lighter, and lower in cost.
  • COP cycloolefin polymer
  • PC polycarbonate
  • the liquid crystal display device of the prior art at least five layered structures are disposed on the outer side of the front polarizer, which greatly increases the thickness of the liquid crystal panel, the operation time and complexity of the manufacturing process. And the consumption of the material to be produced; in addition, the quarter-wavelength wave i ⁇ made of cycloolefin polymer (COP) or polycarbonate (PC) has many layers and a large thickness, which is disadvantageous for the liquid crystal panel. It is developing in the direction of thinning, lightening and low cost.
  • COP cycloolefin polymer
  • PC polycarbonate
  • the present invention proposes a modified liquid crystal display panel.
  • a liquid crystal display panel includes a display substrate, a color filter substrate, and a liquid crystal interlayer between the display substrate and the color filter substrate, and a polarizing light is disposed on a side of the color filter substrate remote from the liquid crystal interlayer
  • the polarizer has a polarizing film layer for filtering a polarization direction of light and a phase retardation film layer fixed to the polarizing film layer, and the phase retardation film layer is made of cellulose triacetate (TAC).
  • TAC cellulose triacetate
  • the phase retardation film layer is capable of converting linearly polarized light entering it into circularly polarized light.
  • circularly polarized light makes the observer's eyes comfortable compared to linearly polarized light, which can effectively alleviate visual fatigue and protect eye health.
  • the optical axis of the phase retardation film layer is at an angle of 45 degrees with the transmission axis of the polarizing film layer, and the phase retardation film layer is capable of causing a quarter-wavelength effective phase to the light passing therethrough. delay.
  • the light from the polarizing film layer is linearly polarized light, and its polarization direction is 45 with respect to the optical axis of the phase retardation film layer. Angle. After the light enters the phase retardation film layer, it is in a direction perpendicular to the optical axis of the phase retardation film layer. Parallel to the phase retardation film layer: two vibration components, namely E, are resolved in the direction of the optical axis. (t) and t). After passing through the phase retardation film layer, an effective phase difference of one quarter wavelength is generated between the phases of the two vibration components. Since the phase of the phase is 2 ⁇ , the phase difference of an integer multiple of the phase difference of 2 ⁇ is optically equal. Effectively, the true effective phase difference is actually only ⁇ 71/2). Therefore, the light emitted from the phase retardation film layer is circularly polarized light.
  • the chemical and physical properties of cellulose triacetate determine the optical, physical and chemical properties of the phase retardation film produced. This dictates that a considerable degree of processing (e.g., coating, drying, curing, etc.) can be performed on the surface without damaging the optical and mechanical properties of the phase retardation film. After a certain treatment on its surface, it retains the shape of the film, the direction of the optical axis, and the phase delay function.
  • the phase retardation film layer further has at least one of an anti-glare material, an anti-reflection material, and a scratch-resistant material.
  • at least one of the anti-glare material, the anti-reflection material, and the scratch-resistant material is applied to the surface of the phase retardation film layer by coating.
  • the present invention also provides a method for manufacturing a liquid crystal display panel, comprising at least the following steps: Step 1: using a cellulose triacetate as a substrate to fabricate a phase retardation film layer, and causing the optical axis of the phase retardation film layer Extending toward the first direction while enabling the phase retardation film layer to cause an effective phase delay of a quarter wavelength of light passing therethrough; Step 2: surface treating the phase retardation film layer such that the phase delay The film layer has at least one of anti-glare, anti-reflection and scratch-proof functions; Step 3: fixing the phase retardation film layer to the polarizing film layer to form a polarizer, such that the first direction The direction of the transmission axis of the polarizing film layer is at an angle of 45 degrees.
  • the polarizing function, the phase delay function, the anti-glare function, the anti-reflection function and the anti-scratch function need to produce different optical films by different locations or manufacturers respectively. , then assemble them together to achieve.
  • the whole process is very cumbersome, and the time and money cost of operation is extremely high.
  • the compatibility, stability, adaptability, etc. between the optical films produced by different production lines must be strictly screened and adjusted.
  • the above plurality of functions are integrated into one polarizer in a single process through a continuous process, which greatly reduces the time, labor, and money costs of assembly, screening, and adaptation processes. Brought a significant advancement.
  • step 2 comprises the following sub-steps: sub-step 21: cleaning the phase retardation film layer; sub-step 22: coating an anti-glare material, an anti-reflection material and a scratch-resistant material on the surface of the phase retardation film layer At least one of; sub-step 23: drying and hardening the material applied in sub-step 22.
  • the hardening treatment is performed by an ultraviolet curing process or a thermal curing process.
  • cellulose triacetate The properties of cellulose triacetate are very stable and can be processed to a considerable extent on the surface.
  • phase retardation film layer After a certain treatment on its surface, it still retains the shape of the film, the direction of the optical axis, and the phase delay function.
  • the polarizing film layer can be produced using polyethylene glycol (PVA).
  • PVA polyethylene glycol
  • the properties of polyethylene glycol are most suitable for making a polarizing film layer, and at the same time, it is easy to obtain and low in cost.
  • the first direction is at an angle of 45 degrees to the first edge of the phase retardation film layer extending in a straight line such that the direction of the transmission axis of the polarizing film layer and the polarized light At least one second edge extending in a straight line of the film layer is parallel or perpendicular, and the first edge is parallel to the second edge when the phase retardation film layer is fixed to the polarizing film layer.
  • the first direction of the phase retardation film layer is marked, the direction of the transmission axis of the polarizing film layer is marked, and the phase retardation film layer is fixed to the polarizing film layer.
  • the first direction is at an angle of 45 degrees with the direction of the transmission axis of the polarizing film layer.
  • the phase retardation film layer can be freely tailored to fit different types of liquid crystal panels. Reduces material wear and reduces production costs.
  • the invention makes clever use of the characteristics of the cellulose triacetate material, and uses the phase retardation film layer to form a phase retardation film layer thereon, and performs the process treatment on the surface thereof, and realizes the polarization function, the phase delay function, and the defense only through the polarizer itself of the liquid crystal panel. Dizzy, anti-reflective and anti-scratch features. The thickness of the liquid crystal panel, material consumption and production process complexity are greatly reduced.
  • Fig. 2 shows a liquid crystal display panel according to the present invention, in which an image above the page is an enlarged schematic view of a circle portion.
  • Figure 2 shows a liquid crystal display panel in accordance with the present invention.
  • a liquid crystal display panel includes an array substrate 21, a color filter substrate 22, and a liquid crystal interlayer 23 between the array substrate 21 and the color filter substrate 22.
  • a polarizer 24 is disposed on a side of the color filter substrate 22 remote from the liquid crystal interlayer 23, and a polarizer 25 is disposed on a side of the array substrate 21 remote from the liquid crystal interlayer 23.
  • the polarizer 24 has a polarizing film layer 27 for filtering the polarization direction of light and a phase retardation film layer 26 fixed to the polarizing film layer 27.
  • the phase retardation film layer 26 is made of cellulose triacetate, and the phase retardation film layer 26 is capable of converting linearly polarized light entering it into circularly polarized light. It has been explained in the background art that circularly polarized light makes the observer's eyes feel comfortable compared to linearly polarized light, which can effectively alleviate visual fatigue and protect eye health.
  • the optical axis of the phase retardation film layer 26 and the transmission axis of the polarizing film layer 27 are
  • the phase retardation film layer 26 is capable of causing an effective phase delay of a quarter wavelength for light passing therethrough.
  • the light from the polarizing film layer 27 is linearly polarized light, and its polarization direction is at an angle of 45 to the optical axis of the phase retardation film layer 26.
  • phase retardation film layer 26 After passing through the phase retardation film layer 26, an effective phase difference of a quarter wavelength is generated between the phases ⁇ 0 of the two vibration components (since the phase of the phase is 2 ⁇ , the phase difference of the integer multiple of the phase difference of 2 ⁇ is The optical effect is equivalent, and the truly effective phase difference is actually only ⁇ 7!/2). Therefore, the light emitted from the phase retardation film layer 26 is medically polarized light.
  • the chemical and physical properties of cellulose triacetate determine the optical, thermal, physical and chemical properties of the phase retardation film layer 26 produced. Stable. This dictates that a considerable degree of processing (e.g., coating coating, drying treatment, curing treatment, etc.) can be performed on the surface without damaging the optical and mechanical properties of the phase retardation film layer 26. After the surface has been subjected to a predetermined treatment, it still retains the shape of the film layer, the direction of the optical axis, and the phase delay. Therefore, in order to make the manufactured liquid crystal panel better to be actually displayed, the phase retardation film Layer 26 also has at least one of an anti-glare material, an anti-reflective material, and a scratch-resistant material. The anti-glare material, the anti-reflective material, and the scratch-resistant material may be applied to the surface of the phase retardation film layer 26 by coating.
  • the present invention realizes the polarizing function, the phase delay function, the anti-glare function, the anti-reflection function, and the anti-scratch function only by the polarizer 24 - the components compared to the prior art six film layers.
  • the thickness of the liquid crystal panel, material consumption and production process complexity are greatly reduced.
  • the present invention also proposes a method for manufacturing a liquid crystal display panel, which comprises at least the following steps - Step 1: Fabricating a phase retardation film layer 26 using cellulose acetate acetate as a substrate, and causing light of the phase retardation film layer 26 The axis extends toward the first direction while enabling the phase retardation film layer 26 to cause an effective phase delay of a quarter wavelength for the light passing therethrough.
  • Step 2 The phase retardation film layer 26 is surface-treated such that the phase retardation film layer 26 has at least one of anti-glare, anti-reflection and scratch-proof functions.
  • step 2 includes the following sub-steps: Sub-step 21: The phase retardation film layer 26 is cleaned. Sub-step 22: coating at least one of an anti-glare material, an anti-reflective material and a scratch-resistant material on the surface of the phase retardation film layer 26; sub-step 23: drying the village material coated in the sub-step 22 And hardening treatment.
  • the hardening treatment can be carried out by an ultraviolet curing process or a thermal curing process.
  • Step 3 The phase retardation film layer 26 is fixed to the polarizing film layer 27 to constitute the polarizer 24 such that the first one is at an angle of 45 degrees with respect to the transmission axis direction of the polarizing film layer 27.
  • the polarizing function, the phase delay function, the anti-glare function, the anti-reflection function and the anti-scratch function are concentrated in the polarizer 24 by a series of process steps. This greatly reduces the thickness, material consumption, and manufacturing process complexity of the liquid crystal panel compared to the prior art.
  • the polarizing function, the phase delay function, the anti-function function, the anti-reflection function and the anti-scratch function need to produce different optical films by different places or manufacturers respectively. Then assemble them together to achieve. The whole process is very cumbersome, and the time and money cost of operation is extremely high. At the same time, the compatibility, stability, adaptability, etc. between the optical films produced by different production lines must be strictly screened and adjusted.
  • Integrating the above various functions into the polarizer 24 in one process greatly reduces the time, labor, and money costs of assembly, screening, and adaptation processes, and brings significant progress.
  • the first direction is at an angle of 45 degrees to the first edge of the phase retardation film layer 26 that extends in a straight line.
  • the direction of the transmission axis of the polarizing film layer 27 is made parallel or perpendicular to at least one of the second edges of the polarizing film layer 27 extending in a straight line, and when the phase retardation film layer 26 is fixed to the polarizing film layer 27, the first The edge is parallel to the second edge. In this way, when the phase retardation film layer 26 is fixed to the polarizing film layer 27, it is actually only necessary to align the trimming edges, the operation is simple, the error is low, and the yield of the product is improved.
  • the first direction of the phase retardation film layer 26 is marked to mark the direction of the transmission axis of the polarizing film layer 27, and when the phase retardation film layer 26 is fixed to the polarizing film layer 27, One direction is at an angle of 45 degrees with the direction of the transmission axis of the polarizing film layer 27.
  • the phase retardation film layer 26 can be tailored to fit different types of liquid crystal panels. The material consumption is reduced, and the production cost is reduced.
  • a polarizing film layer 27 is produced using polyethylene glycol (PVA).
  • PVA polyethylene glycol
  • the properties of polyethylene glycol (PVA) are well suited for the production of optical components that are eclipsed by polarized light.
  • the invention realizes the polarizing function, the phase delay function, the anti-glare function, the anti-reflection function and the anti-scratch function only through the components of the polarizer 24.
  • the thickness of the liquid crystal panel, material consumption and production process complexity are greatly reduced.

Abstract

一种液晶显示面板及用于制造液晶显示面板的方法。液晶显示面板包括阵列基板（21）、彩膜基板（22）和液晶夹层（23），在彩膜基板（22）的一侧设置有偏光片（24），偏光片（24）具有用于过滤光的偏振方向的偏光膜层（27）和固定到偏光膜层（27）上的相位延迟膜层（26），相位延迟膜层（26）由三醋酸纤维素（TAC）制成，且相位延迟膜层（26）能够将进入其的线偏振光转换成圆偏振光。制造液晶显示面板的方法，至少包括如下步骤：步骤1：利用三醋酸纤维素作为基材来制作相位延迟膜层（26）；步骤2：对相位延迟膜层（26）进行表面处理；步骤3：将相位延迟膜层（26）固定到偏光膜层（27）上以构成偏光片（24）。

Description

液晶显示面板及用于制造液晶显示面板的方法 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用于制造液晶 显示面板的方法。 背景技术
文献 《用瞬目频率评价液晶电视的偏振特性对视疲劳的影响》 中研究了偏振 光与摄入偏振光的人眼的视觉疲劳之间的关系。
在该文献中， 比较了液晶电视射出的线偏振:光和圆偏振光对视疲劳的影响程 度。 将 64例正常人隨机分为两组， 每组 32例， 分别观看出射光为线偏振光或圆 偏振光的液晶电视机播放的故事片 125min。 用眼电图 (EOG)记录观看故事片前后 及观看故事片过程中的瞬目频率， 分析比较瞬目频率的变化特性。 结果线偏振光 组观看故事片后的瞬目频率比观看前高， 差异有统计学意义 (Ρ·<0.01 ); 圆偏振光 组观看故事片前后的瞬目频率差异无统计学意义 (Ρ>0.05)。 该文献所得出的结论 是， 长 间观看出射光为线偏振光的液晶电视机较出射光为圆偏振光时易引起视 疲劳。
如果能够对显示装置进行改迸， 使其发出让人眼更舒服的圆偏振光， 将能够 带来相当的进步。
】/4波片是一种产生和检验圆偏振光或椭圆偏振光的光学薄片。设一平行光束 正入射， 在波片内这光束則照直前进而透射出来。 但横平面上两个特征振动 E。(t) 和 Ee(t)的传播速度分别为 V。和 Ve。虽然经历同一厚度，但光程 L。和 :Le却不相等。 换言之， 通过波片， E。(t)和 Ee(t)之间产生了跗加相位差， 即造成了相位延迟。
图 1显示了现有技术中的一种最终发出圆偏振光的液晶显示面板。
参照图 1 , 该面板包括阵列基板〗、彩膜基板 2和位于阵列基板〗和彩膜基板 2之间的液晶夹层 3， 在彩膜基板 2的远离液晶夹层 3的一侧设置有前偏光 j† 4, 在阵列基板 1的远离液晶夹层 3的一侧设置有后偏光片 5 , 其中在前偏光片 4的 远离液晶夹层 3的一侧设置有四分之一波长波片 6， 用于将来自前偏光片 4的线 偏振:光转换成圆偏振光。 参照放大图， 四分之一波长波片 6通过胶层 7粘接到前 偏光片 4上。 四分之一波长波片 6的材料为环烯烃聚合物 (COP)或聚碳酸酯 (PC)。
然而， 考虑到液晶显示装置的实际应用， 还需要防晕、 防反射等功能。 因此 在四分之一波长波 i† 6之外， 还粘接有防眩光层 8、 防反射光层 9等。 如果要提 供物理性防刮伤的功能， 则还要再增设图 i中未示出的防刮伤膜片。 在图 1的放 大部分中可以看到， 在现有技术中的这种液晶显示装置中， 前偏光片 4的外侧还 设置有至少四个层状结构（如果包括防刮伤功能， 则需增设至少五个层状结构）。 这大大增大了液晶面板的厚度、 制作工艺的操作^间和复杂性以及制作村料的消 耗量。 另外， 由环烯烃聚合物 (COP)或聚碳酸酯 (PC)所制作的四分之一波长波片 的层数很多， 且厚度较大， 不利于液晶面板朝向薄化、 轻化和低成本化的方向发 展。 发明内容
综上所述， 在现有技术中的这种液晶显示装置中， 前偏光片的外侧还设置有 至少五个层状结构， 这大大增大了液晶面板的厚度、 制作工艺的操作时间和复杂 性以及制作材料的消耗量； 另外， 由环烯烃聚合物 (COP)或聚碳酸酯 (PC)所制作 的四分之一波长波 i†的层数很多， 且厚度较大， 不利于液晶面板朝向薄化、 轻化 和低成本化的方向发展。
针对上述不足， 本发明提出了一种改迸的液晶显示面板。
根据本发明的液晶显示面板包括陈列基板、 彩膜基板和位于所述陈列基板和 所述彩膜基板之间的液晶夹层， 在所述彩膜基板的远离所述液晶夹层的一侧设置 有偏光片， 其中， 所述偏光片具有用于过滤光的偏振方向的偏光膜层和固定到所 述偏光膜层上的相位延迟膜层， 所述相位延迟膜层 :三醋酸纤维素 (TAC)制成， 且所述相位延迟膜层能够将进入其的线偏振光转换成圆偏振光。 在背景技术部分 已经交代过， 圆偏振光相比于线偏振光而言使得观察者眼睛舒服， 能够有效减缓 视疲劳， 保护眼睛健康。
优选地， 所述相位延迟膜层的光轴与所述偏光膜层的透光轴呈 45度夹角， 且 所述相位延迟膜层能够对通过其的光线造成四分之一波长的有效相位延迟。
来自偏光膜层的光线为线偏振光，且其偏振方向与相位延迟膜层的光轴呈 45。 夹角。 该光线迸入相位延迟膜层后， 其在垂直于相位延迟膜层的光轴的方向上和 平行于相位延迟膜层的:光轴的方向上分别分解出两个振动分量， 即 E。(t)和 t)。 在通过相位延迟膜层后， 该两个振动分量的相位之间会产生四分之一波长的有效 相位差 因相位的周期为 2π, 因此相差 2π的整数倍的相位差在光学效果上是等 效的， 真正有效的相位差实际上只有±71/2) 。 因而从相位延迟膜层射出的光线即 为圆偏振光。
另一方面， 相比许多其它的材料， 三醋酸纤维素的化学、 物理性质决定了其 所制成的相位延迟膜层的光学性质、 物理性质和化学性质都非常稳定。 这决定了 ―可以在其表面进行相当程度的工艺处理（例如涂层涂布、干燥处理、固化处理等）， 却不会破坏相位延迟膜层的光学性质和机械性质。 在其表面进行了一定的处理 后， 其仍保留着膜层的形状、 光轴排布方向、 以及相位延迟功能。
优选地， 所述相位延迟膜层还具有防眩材料、 防反射材料和防刮伤材料中的 至少一种。 优选地， 所述防眩材料、 防反射材料和防刮伤材料中的至少一种通过 涂布的方式设置到所述相位延迟膜层的表面上。 如此地， 相比于现有技术的至少 六个膜片， 本发明仅通过一个膜层， 就实现了偏光功能、 相位延迟功能、 防眩功 能、 防反射功能和防划伤功能。 大大降低了液晶面板的厚度、 村料消耗和生产工 艺复杂性。
本发明还提出了一种用于制造液晶显示面板的方法， 至少包括如下步骤： 步 骤 1 ; 利用三醋酸纤维素作为基材来制作相位延迟膜层， 并且使得所述相位延迟 膜层的光轴朝向第一方向延伸， 同时使得所述相位延迟膜层能够对通过其的光线 造成四分之一波长的有效相位延迟； 步骤 2: 对所述相位延迟膜层进行表面处理， 使得所述相位延迟膜层具有防眩、 防反射和防刮伤的功能中的至少一种； 歩骤 3 : 将所述相位延迟膜层固定到偏光膜层上以构成偏光片， 使得所述第一方向与所述 偏光膜层的透光轴方向呈 45度夹角。
尤其针对工艺步骤的复杂性而言， 现有技术中， 偏光功能、 相位延迟功能、 防眩功能、 防反射功能和防划伤功能需要通过分别在不同的地点或厂家生产不同 的光学膜 i†， 再将它们组装到一起来实现。 整个过程非常繁琐， 运营的时间和金 钱成本极高。 同时， 不同生产线所产出的光学膜片之间， 其兼容性、 稳定性、 适 配性等必须进行严格的筛选和调整。而在本发明的方法中，通过连贯的工艺制程， 在一条工艺流程中将上述多种功能集成到一个偏光片中，大大降低了组装、筛选、 适配等工序的时间、 人力、 金钱成本， 带来了显著的进歩。 优选地，步骤 2包括如下子步骤：子步骤 21 :对所述相位延迟膜层进行清洗; 子步骤 22: 在所述相位延迟膜层表面涂布防眩材料、 防反射材料和防刮伤材料中 的至少一种； 子步骤 23 : 对在子歩骤 22中所涂布的材料进行干燥和硬化处理。 优选地， 所述硬化处理通过紫外线固化工艺或热固化工艺来进行。
ώ于三醋酸纤维素的性质非常稳定， 可以在其表面进行相当程度的工艺处理
(倒如涂层涂布、 干燥处理、 固化处理等） ， 却不会破坏相位延迟膜层的光学性 质和机械性质。 在其表面进行了一定的处理后， 其仍保留着膜层的形状、 光轴排 布方向、 以及相位延迟功能。
优选地， 可以使用聚乙稀醇 (PVA)来制造所述偏光膜层。 聚乙稀醇的性质最 适合于制作偏光膜层， 同时其获取容易、 成本低廉。
在一个实施例中， 使得所述第一方向与所述相位延迟膜层的至少一个沿直线 延伸的第一边缘呈 45 度夹角， 使得所述偏光膜层的透光轴方向与所述偏光膜层 的至少一个沿直线延伸的第二边缘平行或垂直， 在将所述相位延迟膜层固定到所 述偏光膜层时， 使得所述第一边缘与所述第二边缘平行。 以此方式， 在将相位延 迟膜层固定到偏光膜层日 实际上只需要对齐裁剪边缘， 操诈简单， 误差低， 产 品良率得到提高。
在另一个实施例中， 对所述相位延迟膜层的第一方向进行标记， 对所述偏光 膜层的透光轴方向进行标记， 在将所述相位延迟膜层固定到所述偏光膜层时， 使 得所述第一方向与所述偏光膜层的透光轴方向呈 45 度夹角。 以此方式， 可以自 由裁剪相位延迟膜层， 使其适配于不同型号的液晶面板。 降低了材料的耗损， 同 时降低了生产成本。
本发明巧妙利用:三醋酸纤维素材料的特性， 利用其制成相位延迟膜层， 并在 其表面进行工艺处理， 仅通过液晶面板的偏光片本身， 就实现了偏光功能、 相位 延迟功能、 防眩功能、 防反射功能和防划伤功能。 大大降低了液晶面板的厚度、 材料消耗和生产工艺复杂性。
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
在下文中将基于仅为非限定性的实施例并参考對图来对本发明进行更详细的 描述。 其中- 图〗 显示了现有技术中的液晶显示面板， 其中页面上方的图像为圆圈部分的 放大示意图；
图 2显示了根据本发明的液晶显示面板， 其中页面上方的图像为圆圈部分的 放大示意图。
在图中， 相同的构件由相同的附图标记标示。 對图并未按照实际的比例绘制。 具体实施方式
下面将参照 ϋ图来详细地介绍本发明。
图 2显示了根据本发明的液晶显示面板。
参照图 2, 根据本发明的液晶显示面板， 包括阵列基板 21、 彩膜基板 22和位 于阵列基板 21和彩膜基板 22之间的液晶夹层 23。 在彩膜基板 22的远离液晶夹 层 23的一侧设置有偏光片 24， 在阵列基板 21的远离液晶夹层 23的一侧设置有 偏光片 25。
在根据本发明的液晶显示面板中，偏光片 24具有用于过滤光的偏振方向的偏 光膜层 27和固定到偏光膜层 27上的相位延迟膜层 26。
相位延迟膜层 26 三醋酸纤维素制成， 且相位延迟膜层 26能够将进入其的 线偏振光转换成圆偏振光。 在背景技术部分已经交代过， 圆偏振光相比于线偏振 光而言使得观察者眼睛感到舒服， 能够有效减缓视疲劳， 保护眼睛健康。
在图 2所示的实施例中， 相位延迟膜层 26的光轴与偏光膜层 27的透光轴呈
45度夹角， 旦相位延迟膜层 26能够对通过其的光线造成四分之一波长的有效相 位延迟。 来自偏光膜层 27的光线为线偏振光， 且其偏振方向与相位延迟膜层 26 的光轴呈 45°夹角。该光线进入相位延迟膜层 26后，其在垂直于相位延迟膜层 26 的光轴的方向上和平行于相位延迟膜层 26 的光轴的方向上分别分解出两个振动 分量， 即 E。(t)和 E¾0。 在通过相位延迟膜层 26后， 该两个振动分量的相位 φ0 和 之间会产生四分之一波长的有效相位差 （因相位的周期为 2π， 因此相差 2π 的整数倍的相位差在光学效果上是等效的， 真正有效的相位差实际上只有±7!/2) 。 因而从相位延迟膜层 26射出的光线即为醫偏振光。
另一方面， 相比许多其它的材料， 三醋酸纤维素的化学、 物理性质决定了其 所制成的相位延迟膜层 26 的光学性质、 热学性质、 物理性质和化学性质都非常 稳定。 这决定了可以在其表面进行相当程度的工艺处理 （例如涂层涂布、 千燥处 理、 固化处理等） ， 却不会破坏相位延迟膜层 26 的光学性质和机械性质。 在其 表面进行了 ·定的处理后， 其仍保留着膜层的形状、 光轴排布方向、 以及相位延 因此， 为了使得所制造的液晶面板能够更好地应 于实际显示， 相位延迟膜 层 26还具有防眩材料、 防反射材料和防刮伤材料中的至少一种。 防眩村料、 防 反射材料和防刮伤材料—可以通过涂布的方式设置到相位延迟膜层 26的表面上。
如此地， 相比于现有技术的六个膜层， 本发明仅通过偏光片 24 ·—个部件就实 现了偏光功能、 相位延迟功能、 防眩功能、 防反射功能和防划伤功能。 大大降低 了液晶面板的厚度、 材料消耗和生产工艺复杂性。
本发明还提出了一种用于制造液晶显示面板的方法， 其至少包括如下步骤- 步骤 1 : 利用≡醋酸纤维素作为基材来制作相位延迟膜层 26, 并且使得相位 延迟膜层 26的光轴朝向第 ·方向延伸， 同时使得相位延迟膜层 26能够对通过其 的光线造成四分之一波长的有效相位延迟。
歩骤 2: 对相位延迟膜层 26进行表面处理， 使得相位延迟膜层 26具有防眩、 防反射和防刮伤的功能中的至少一种。
优选地， 歩骤 2包括如下子歩骤： 子歩骤 21 : 对相位延迟膜层 26进行清洗。 子步骤 22: 在相位延迟膜层 26表面涂布防眩材料、 防反射材料和防刮伤材料中 的至少一种； 子步骤 23 : 对在子步骤 22中所涂布的村料迸行干燥和硬化处理。 硬化处理可以通过紫外线固化工艺或热固化工艺来进行。
步骤 3 : 将相位延迟膜层 26固定到偏光膜层 27上以构成偏光片 24, 使得第 一方 ^与偏光膜层 27的透光轴方向呈 45度夹角。
可见在根据本发明的方法中， 通过 ·系列的工艺步骤， 将偏光功能、 相位延 迟功能、 防眩功能、 防反射功能和防刮伤功能集中到了偏光片 24 中。 相比现有 技术， 这大大降低了液晶面板的厚度、 材料消耗和生产工艺复杂性。
尤其针对工艺步骤的复杂性而言， 现有技术中， 偏光功能、 相位延迟功能、 防 功能、 防反射功能和防划伤功能需要通过分别在不同的地点或厂家生产不同 的光学膜 i†， 再将它们组装到一起来实现。 整个过程非常繁琐， 运营的时间和金 钱成本极高。 同时， 不同生产线所产出的光学膜片之间， 其兼容性、 稳定性、 适 配性等必须进行严格的筛选和调整。而在本发明的方法中，通过连贯的工艺制程， 在一条工艺流程中将上述多种功能集成到偏光片 24中， 大大降低了组装、 筛选、 适配等工序的时间、 人力、 金钱成本， 带来了显著的进步。
对于相位延迟膜层 26的光轴和偏光膜层 27的透光轴之间的 45度夹角的构 成， 可采取如下两种实施方式：
在一个实施方式中，使得第一方向与相位延迟膜层 26的至少一个沿直线延伸 的第一边缘呈 45度夹角。 同时， 使得偏光膜层 27 的透光轴方向与偏光膜层 27 的至少一个沿直线延伸的第二边缘平行或垂直， 在将相位延迟膜层 26 固定到偏 光膜层 27 上时， 使得第一边缘与第二边缘平行。 以此方式， 在将相位延迟膜层 26固定到偏光膜层 27时， 实际上只需要对齐裁剪边缘， 操作简単， 误差低， 产 品良率得到提高。
在另一个实施方式中，对相位延迟膜层 26的第一方向进行标记，对偏光膜层 27的透光轴方向进行标记， 在将相位延迟膜层 26固定到偏光膜层 27时， 使得第 一方向与偏光膜层 27的透光轴方向呈 45度夹角。 以此方式， 可以自 ώ裁剪相位 延迟膜层 26， 使其适配于不同型号的液晶面板。 降低了材料的耗损， 同^降低了 生产成本。
优选地， 使用聚乙稀醇 (PVA)来制造偏光膜层 27。 聚乙稀醇 (PVA)的性质很 适合 来制诈 于偏光的光学部件。
本发明仅通过偏光片 24—个部件， 就实现了偏光功能、 相位延迟功能、 防眩 功能、 防反射功能和防划伤功能。 大大降低了液晶面板的厚度、 材料消耗和生产 工艺复杂性。
虽然己经参考优选实施例对本发明进行了描述， 但在不脱离本发明的范围 的情况下， 可以对其进行各种改进并且可以用等效物替换其中的部件。 本发明并 不局限于文中公幵的特定实施倒， 而是包括落入权利要求的范围内的所有技术方 案。

Claims

要求
1. 一种液晶显示面板， 包括阵列基板 (21)、 彩膜基板 (22)和位于所述阵列基 板 (2 )和所述彩膜基板 (22)之间的液晶夹层 (23)， 在所述彩膜基板 (22)的远离所述 液晶夹层 (23)的一侧设置有偏光片 (24), 其中， 所述偏光片 (24)具有 ^于过滤光的 偏振方向的偏光膜层 (27)和固定到所述偏光膜层 (27)上的相位延迟膜层 (26)， 所述 相位延迟膜层 (26)由三醋酸纤维素制成，且所述相位延迟膜层 (26)能够将进入其的 线偏振光转换成圆偏振光。
2. 根据权利要求 1所述的液晶显示面板， 其中， 所述相位延迟膜层 (26)的光 轴与所述偏光膜层 (27)的透光轴呈 4权5度夹角， 旦所述相位延迟膜层 (26)能够对通 禾
过其的光线造成四分之一波长的有效相位延迟。
3. 根据权利要求 1所述的液晶显示面板， 其中， 所述相位延迟膜层 (26)还具 有防眩材料、 防反射材料和防刮伤材料中的至少一种。
4. 根据权利要求 2所述的液晶显示面板， 其中， 所述相位延迟膜层 (26)还具 有防眩材料、 防反射材料和防刮伤材料中的至少一种。
5. 根据权利要求 3所述的液晶显示面板， 其中， 所述防眩 料、 防反射 料 和防刮伤材料中的至少一种通过涂布的方式设置到所述相位延迟膜层 (26)的表面 上。
6. 根据权利要求 4所述的液晶显示面板， 其中， 所述防眩材料、 防反射材料 和防刮伤材料中的至少一种通过涂布的方式设置到所述相位延迟膜层 (26)的表面
7. 用于制造液晶显示面板的方法， 其中， 至少包括如下步骤- 步骤】： 利用≡醋酸纤维素诈为基材来制作相位延迟膜层 (26), 并旦使得所述 相位延迟膜层 (26)的光轴朝向第一方向延伸，同时使得所述相位延迟膜层 (26)能够 对通过其的光线造成四分之一波长的有效相位延迟；
步骤 2: 对所述相位延迟膜层 (26)进行表面处理， 使得所述相位延迟膜层 ί26) 具有防眩、 防反射和防刮伤的功能中的至少一种；
步骤 3 ; 将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)上以构成偏光片 (24), 使得所述第一方向与所述偏光膜层 (27)的透光轴方 ^呈 45度夹角。
8. 根据权利要求 7所述的方法， 其中， 步骤 2包括如下子歩骤；
子歩骤 2h 对所述相位延迟膜层 (26)进行清洗； 子歩骤 22: 在所述相位延迟膜层 (26)表面涂布防眩材料、 防反射材料和防刮 伤材料中的至少 ·种；
子步骤 23: 对在子歩骤 22中所涂布的材料进行干燥和硬化处理。
9. 根据权利要求 8所述的方法， 其中， 所述硬化处理通过紫外线固化工艺或 热固化工艺来进行。
10. 根据权利要求 7所述的方法， 其中， 使 ¾聚乙稀醇来制造所述偏光膜层
(27)。
11. 根据权利要求 8所述的方法， 其中， 使 ^聚乙稀醇来制造所述偏光膜层
(27)。
12. 根据权利要求 9所述的方法， 其中， 使用聚乙稀醇来制造所述偏光膜层
(27)。
13. 根据权利要求 7所述的方法， 其中， 使得所述第一方向与所述相位延迟 膜层 (26)的至少 ·个沿直线延伸的第 ·边缘呈 45度夹角， 使得所述偏光膜层 (27) 的透光轴方向与所述偏光膜层 (27)的至少一个沿直线延伸的第二边缘平行或垂 直， 在将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)时，使得所述第一边缘与 所述第二边缘平行。
14. 根据权利要求 8 所述的方法， 其中， 使得所述第一方向与所述相位延迟 膜层 (26)的至少一个沿直线延伸的第一边缘呈 45度夹角， 使得所述偏光膜层 (27) 的透光轴方向与所述偏光膜层 (27)的至少一个沿直线延伸的第二边缘平行或垂 直， 在将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)时，使得所述第一边缘与 所述第二边缘平行。
】5, 根据权利要求 9 所述的方法， 其中， 使得所述第一方向与所述相位延迟 膜层 (26)的至少一个沿直线延伸的第一边缘呈 45度夹角， 使得所述偏光膜层 (27) 的透光轴方向与所述偏光膜层 (27)的至少一个沿直线延伸的第二边缘平行或垂 直， 在将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)时， 使得所述第 ·边缘与 所述第二边缘平行。
16. 根据权利要求 7所述的方法， 其中， 对所述相位延迟膜层 (26)的第一方向 进行标记， 对所述偏光膜层 (27)的透光轴方向进行标记， 在将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)时， 使得所述第一方向与所述偏光膜层 (27)的透光轴 方向呈 45度夹角。
17. 根据权利要求 8所述的方法， 其中， 对所述相位延迟膜层 (26)的第一方向 进行标记， 对所述偏光膜层 (27)的透光轴方向进行标记， 在将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)时， 使得所述第一方向与所述偏光膜层 (27)的透光轴 方向呈 45度夹角。
18. 根据权利要求 9所述的方法， 其中， 对所述相位延迟膜层 (26)的第一方向 进行标记， 对所述偏光膜层 (27)的透光轴方向进行标记， 在将所述相位延迟膜层 (26)固定到所述偏光膜层 (27)时， 使得所述第一方向与所述偏光膜层 (27)的透光轴 方向呈 45度夹角。
PCT/CN2014/071267 2013-12-31 2014-01-23 液晶显示面板及用于制造液晶显示面板的方法 WO2015100825A1 (zh)

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CN106249452A (zh) * 2016-10-11 2016-12-21 武汉华星光电技术有限公司 一种cf基板的制造方法及uv固化装置、cf基板生产线
CN113946070A (zh) * 2021-09-26 2022-01-18 深圳市三利谱光电科技股份有限公司 一种相位延迟偏光片及其加工工艺和光学显示装置

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