WO2016197428A1 - 光阀及显示装置 - Google Patents

光阀及显示装置 Download PDF

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Publication number
WO2016197428A1
WO2016197428A1 PCT/CN2015/083438 CN2015083438W WO2016197428A1 WO 2016197428 A1 WO2016197428 A1 WO 2016197428A1 CN 2015083438 W CN2015083438 W CN 2015083438W WO 2016197428 A1 WO2016197428 A1 WO 2016197428A1
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WO
WIPO (PCT)
Prior art keywords
light
area
substrate
driving
visor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/083438
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English (en)
French (fr)
Inventor
姜宇锐
李得俊
崔宏青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd, Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/893,880 priority Critical patent/US10007107B2/en
Publication of WO2016197428A1 publication Critical patent/WO2016197428A1/zh
Anticipated expiration legal-status Critical
Priority to US15/987,995 priority patent/US10678045B2/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—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
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/48—Variable attenuator

Definitions

  • the invention relates to a technical field of a microelectromechanical system, and in particular to a device.
  • FIG. 1 the main structure of the LCD panel on the market is as shown in FIG. 1 , including a backlight source 1, a light guide plate 2, a brightness enhancement film 3, a lower polarizer 4, a TFT substrate 5, a liquid crystal layer 6, a color filter substrate 7, and an upper polarizer 8. , reflective sheet 9.
  • the polarization direction of the linearly polarized light generated by the backlight passing through the lower polarizer changes a little angle, and the light passes through the color filter substrate to form different color lights, due to the polarization direction of the light
  • the upper polarizer passes through different angles of the axis, and the intensity of the light emitted by the light can be controlled, thus forming the image we need to display.
  • the liquid crystal display liquid crystal is not self-illuminating, the light source must be provided by the backlight.
  • the alignment of the liquid crystal molecules cannot completely meet the design requirements, the pixels cannot be completely turned off when the black screen is displayed, and some light energy can be Emitted from the panel, resulting in lower contrast, can not meet consumer demand for high image quality.
  • MEMS Micro Electro Mechanical Systems
  • Another object of the present invention is to provide a display device using the above light valve.
  • the light valve device of the present invention includes a driving substrate having a light shielding area and a light transmission area, and a light shielding unit, wherein the light shielding unit includes a first light shielding plate and two driving units, and the two driving units are connected to each other. a light shielding plate, wherein the driving unit and the first light shielding plate are fixed to a light shielding area adjacent to the driving substrate, and the first light shielding plate is interposed between two driving units, and the driving unit is capable of Drive two
  • the second visors are brought together to the first visor, and the second visor is opposed to the light transmissive area of the driving substrate to block light from entering the driving substrate.
  • the light valve device further includes a swing arm, the second light shielding plate is connected to the driving unit through the swing arm, and the driving unit drives the swing arm to drive the second light shielding plate in the light shielding area
  • the region and the light transmitting region are rotated relative to each other to complete the state switching of the light valve.
  • the light shielding plate, the driving unit and the surface of the swing arm are coated with a high scattering coating to improve the utilization of light energy.
  • a display panel includes a common electrode line, a plurality of sub-pixels, wherein each sub-pixel is provided with a light valve device, the light valve device includes a driving substrate having a light shielding area and a light transmission area, a light shielding unit, and the light shielding unit a first visor, two driving units, and a second visor connected to each of the two driving units, wherein the driving unit and the first visor are fixed to a light shielding area adjacent to the driving substrate,
  • the first visor is interposed between the two driving units, and the driving unit is capable of driving the two second visors to be close to the first visor, and the second visor is
  • the light transmissive regions of the drive substrate are opposed to block light from entering the drive substrate.
  • the sub-pixel further includes a thin film transistor, a drain of the thin film transistor is connected to the input end of the driving unit, and an output end of the driving unit is connected to the common electrode line.
  • the light valve device further includes a swing arm, the second light shielding plate is connected to the driving unit through the swing arm, and the driving unit drives the swing arm to drive the second light shielding plate in the light shielding area
  • the region and the light transmitting region are rotated relative to each other to complete the state switching of the light valve.
  • the light shielding plate, the driving unit and the surface of the swing arm are coated with a high scattering coating to improve the utilization of light energy.
  • the display panel further includes a color filter substrate, a brightness enhancement film, and a lower polarizer, wherein the lower polarizer is disposed between the color film substrate and the brightness enhancement film, and the light valve device is interposed Between the brightness enhancing film and the lower polarizer.
  • the color film substrate is provided with a matrix black area, and the light shielding area of the driving substrate is opposite to the black area.
  • the display panel further includes a color filter substrate, a brightness enhancement film, and a light guide plate, wherein the brightness enhancement film is disposed between the color film substrate and the light guide plate, and the light valve device is interposed between the brightness enhancement device Between the film and the light guide plate.
  • the color film substrate is provided with a matrix black area, and the light shielding area of the driving substrate Opposite to the black area.
  • the display panel further includes a color filter substrate, a light guide plate and a reflective sheet, the light guide plate is disposed between the color film substrate and the reflective sheet, and the light valve device is interposed between the reflective sheet and the Between the light guide plates.
  • the color film substrate is provided with a matrix black area, and the light shielding area of the driving substrate is opposite to the black area.
  • the invention achieves the purpose of controlling the backlight light at each sub-pixel by the method of providing a MEMS light valve at each sub-pixel to improve the dynamic contrast at each sub-pixel, thereby improving the display effect of the display device.
  • FIG. 1 is a schematic structural view of a prior art LED panel
  • Figure 2 is an enlarged schematic view showing the closed state of the device of the present invention
  • Figure 3 is an enlarged schematic view of the apparatus of the embodiment of the present invention.
  • Figure 4 is a schematic view of a first apparatus having the apparatus of Figure 2;
  • Figure 5 is a schematic view showing a black matrix of a color filter substrate of the present invention.
  • Figure 6 is a schematic view of a second apparatus having the apparatus of Figure 2;
  • Figure 7 is a schematic view of a third apparatus having the apparatus of Figure 2;
  • the light valve device 200 of the present invention includes a driving substrate 12, a partial region (light transmitting region 122) on the driving substrate 12 is transparent, and other regions (light shielding regions 121 covered with a black matrix) are opaque.
  • the light shielding area 121 and the light transmission area 122 are spaced apart and alternately distributed.
  • the light shielding area 121 is for blocking light passage, and the light at the light transmission area 122 can pass through the driving substrate 12, and the light valve device 200 further includes a light shielding unit (not numbered), the light shielding unit includes a driving unit 11, a first light shielding plate 15 and two second light shielding plates 10, and the driving unit 11 and the first light shielding plate 15 are fixed on the driving substrate 12
  • the light shielding area 121 is connected to the driving unit 11 , and the first light shielding plate 15 is interposed between the two second light shielding plates 10 .
  • Each of the light valve devices 200 corresponds to a sub-pixel.
  • the second light-shielding plate 10 is located in the light-shielding region 121, that is, the light valve at this time.
  • the device 200 is in an on state, and the backlight light can directly enter the driving substrate 12 from the two light regions 121, and the pixel does not display black; referring to FIG. 3, when the corresponding sub-pixel of the light valve device 200 needs to display black, Driven by the driving unit 11, the two second visors 10 are brought together to the first visor 15 , and the second visor 10 faces the transparent area 122 to block the backlight light from transmitting.
  • the area 122 enters the drive substrate 12, that is, the light valve device 200 is in a closed state, and the corresponding sub-pixels of the light valve device 200 are completely closed, forming a high contrast with the surroundings, thereby improving the display effect.
  • the second visor 10 and the driving unit 11 can be connected by the swing arm 14
  • the swing arm 14 can be a main component of a thermally deformable device (such as a shape memory alloy), an electromorphic device, or the like, and the swing arm 14 drives the second visor 10 to rotate. Further, in order to reduce the light energy loss and improve the utilization of light energy, a high scattering coating may be applied on the first visor 15 , the two second visors 10 and the swing arm 14 to be directed to the coating. The light of the layer is reflected back to the backlight path to reduce the loss of light energy.
  • a thermally deformable device such as a shape memory alloy
  • electromorphic device or the like
  • the embodiment further provides a display device 100 including a plurality of sub-pixels, the sub-pixels being divided into a plurality of different colors, and each of the sub-pixels is provided with a light valve, wherein at least part of the light valves are as described above.
  • the light valve device 200 includes a top polarizer 8 , a color filter substrate 7 , a liquid crystal layer 6 , a TFT substrate 5 , a polarizer 4 , a light valve device 200 , a brightness enhancement film 3 , and a light guide plate 2 which are disposed from top to bottom. , reflective sheet 9.
  • the light guide plate 2 is disposed at a side of the light guide plate 2, and the light valve device 200 is disposed between the brightness enhancement film 3 and the polarizer 4, and the color filter substrate 1 is used to emit light from a backlight source.
  • the colorization of the image can be achieved by the color filter substrate 1 including the RGB color film layer (ie, the red color film, the green color film, and the blue color film) (not shown) and the matrix distribution black.
  • the area (black matrix) (not numbered), referring to FIG. 5, the black matrix includes a plurality of black matrix elements 52 disposed on the color filter substrate 1 at a distance.
  • the light shielding area 121 of the driving substrate 12 faces the black matrix
  • the light transmitting area 122 of the driving substrate 12 faces the interval 53 between the black matrix elements (ie, the portion of the color filter substrate 1 that transmits light). It is apparent that the number, size, shape, and position of the light shielding region 121 and the light transmitting region 122 of the driving substrate 12 are matched with the black matrix elements 52 and the spaces 53 of the color filter substrate 1.
  • the display device 100 further includes a common electrode line (not shown), a plurality of intersectingly disposed gate lines (not shown), and data lines (not shown), each of the gate lines and the data lines.
  • the intersection is a pixel
  • the sub-pixel further includes a thin film transistor.
  • the gate of the thin film transistor is connected to the gate line, the source is connected to the data line, the input end of the driving unit 11 is connected to the drain of the thin film transistor, and the output end is connected to the common electrode line.
  • the driving signal is supplied to the driving unit 11 through the thin film transistor, so that the content displayed by each sub-pixel can be independently controlled.
  • the light shielding area 121 of the driving substrate 12 may be any opaque structure, but may be a black matrix layer in terms of weight, cost, technical maturity, etc., that is, in the color film substrate 1
  • the black matrix material is used as the light-shielding region 121, and the black matrix material may be a metal or a resin having a strong light-shielding property.
  • the light valve device 200 is disposed between the brightness enhancement film 3 and the light guide plate 2, and the working principle thereof is the same as that of the first embodiment.
  • the display device 100 is similar and will not be described again here.
  • the light valve device 200 is disposed between the reflective sheet 9 and the light guide plate 2, when the sub-pixel needs to display black,
  • the driving of the driving unit 11 , the two second visors 10 are close to the first visor 15 , and the second visor 10 faces the transparent area 122 to block the backlight from passing through the transparent area 122 .
  • the reflective sheet 9 is entered such that the sub-pixels there are displayed in black.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

提供了一种光阀装置（200），包括具有遮光区（121）和透光区（122）的驱动基板（12）、遮光单元，遮光单元包括第一遮光板（15）、两个驱动单元（11），两个驱动单元（11）各连接的一第二遮光板（10），驱动单元（11）与第一遮光板（15）固定在驱动基板（12）相邻的遮光区（121），第一遮光板（15）介于两个驱动单元（11）之间，驱动单元（11）能够驱动两个第二遮光板（10）向第一遮光板（15）并拢，并使得第二遮光板（10）与驱动基板（12）的透光区（122）相对，以阻止光线进入驱动基板（12）。通过在子像素下设置光阀装置（200）可以提高动态对比度，提高显示效果。

Description

光阀及显示装置
本发明要求2015年6月12递交的发明名称为“光阀及显示装置”的申请号201510326084.2的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明一种微机电系统示技术领域，具体一种、示装置。
__技术
目前，市场上LCD面板主要结构如图1所示，包括背光光源1、导光板2、增亮膜3、下偏光片4、TFT基板5、液晶层6、彩膜基板7、上偏光片8、反射片9。通过控制施加在液晶层上电压控制液晶分子转向，从而使由背光发出经过下偏光片产生线偏振光偏振方向发生一点角度改变，光透过彩膜基板后形成不同颜色光，由于光偏振方向与上偏光片透过轴不同夹角，光出射光强弱就可以控制，从而形成我们需要显示画面。
但是在现有技术中，由于液晶显示器液晶并非自发光，必须藉由背光提供光源，但由于液晶分子配向无法完全符合设计要求等原因，在显示黑画面时，像素无法完全关闭，有一些光线能从面板中发出，造成了对比度较低，无法满足消费者对于高画质要求。
_____
本发明的目的在于提供一种使用MEMS(微机电系统)技术的光阀，以提高显示器的动态对比度，以增强显示效果。
本发明的另一目的在于提供一种利用上述光阀的显示装置。
了实现上述目的，本发明实施方式提供如下技术方案：
本发明所述的光阀装置，包括具有遮光区和透光区的驱动基板、遮光单元，所述遮光单元包括第一遮光板、两个驱动单元，所述两个驱动单元各连接的一第二遮光板，所述驱动单元与所述第一遮光板固定在所述驱动基板相邻的的遮光区，所述第一遮光板介于两个所述驱动单元之间，所述驱动单元能够驱动两 个所述第二遮光板向所述第一遮光板并拢，并使得所述第二遮光板与所述驱动基板的透光区相对，以阻止光线进入驱动基板。
其中，所述光阀装置还包括摆臂，所述第二遮光板与所述驱动单元通过所述摆臂连接，所述驱动单元驱动所述摆臂带动所述第二遮光板在遮光区正对区域和透光区正对区域间旋转，完成所述光阀的状态切换。
其中，所述遮光板、所述驱动单元和所述摆臂表面涂有高散射涂层，以提高光能利用率。
一种显示面板，包括公共电极线、多个子像素，其中，每个子像素设有的光阀装置，所述光阀装置包括具有遮光区和透光区的驱动基板、遮光单元，所述遮光单元包括第一遮光板、两个驱动单元，所述两个驱动单元各连接的一第二遮光板，所述驱动单元与所述第一遮光板固定在所述驱动基板相邻的的遮光区，所述第一遮光板介于两个所述驱动单元之间，所述驱动单元能够驱动两个所述第二遮光板向所述第一遮光板并拢，并使得所述第二遮光板与所述驱动基板的透光区相对，以阻止光线进入驱动基板。所述子像素还包括薄膜晶体管，所述薄膜晶体管的漏极与所述驱动单元输入端连接，所述驱动单元输出端连接所述公共电极线。
其中，所述光阀装置还包括摆臂，所述第二遮光板与所述驱动单元通过所述摆臂连接，所述驱动单元驱动所述摆臂带动所述第二遮光板在遮光区正对区域和透光区正对区域间旋转，完成所述光阀的状态切换。
其中，所述遮光板、所述驱动单元和所述摆臂表面涂有高散射涂层，以提高光能利用率。
其中，所述显示面板还包括彩膜基板、增亮膜和下偏光片，所述下偏光片设于所述彩膜基板与所述增亮膜之间，所述光阀装置介于所述增亮膜和所述下偏光片之间。
其中，所述彩膜基板上设有矩阵分布的黑色区域，所述驱动基板的遮光区与所述黑色区域相对设置。
其中，所述显示面板还包括彩膜基板、增亮膜和导光板，所述增亮膜设于所述彩膜基板与所述导光板之间，所述光阀装置介于所述增亮膜和所述导光板之间。
其中，所述彩膜基板上设有矩阵分布的黑色区域，所述驱动基板的遮光区 与所述黑色区域相对设置。
其中，所述显示面板还包括彩膜基板、导光板和反射片，所述导光板设于所述彩膜基板与所述反射片之间，所述光阀装置介于所述反射片和所述导光板之间。
其中，所述彩膜基板上设有矩阵分布的黑色区域，所述驱动基板的遮光区与所述黑色区域相对设置。
本发明实施例具有如下优点或有益效果：
本发明通过在每个子像素处设置MEMS光阀的方法，达到对每子个像素处的背光光线进行控制，以提高每子个像素处的动态对比度的目的，从而提高显示装置显示的效果。
附图说明
为更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术的LED面板结构示意图；
图2是本发明装置关闭状态的放大示意图；
图3是本发明实施例的装置的放大示意图
图4是第一种具有图2所述的装置的示装置示意图；
图5是本发明的彩膜基板黑矩阵示意图；
图6是第二种具有图2所述的装置的示装置示意图；
图7是第三种具有图2所述的装置的示装置示意图；
具体实施方式
面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图2，本发明的光阀装置200，包括驱动基板12，驱动基板12上部分区域(透光区122)透光，其他的区域(遮光区121，覆盖有黑矩阵)不透光。所述遮光区121和透光区122间隔设置、交替分布，所述遮光区121用于阻挡光线通过，所述透光区122处的光线可以通过驱动基板12，所述光阀装置200还包括遮光单元(未编号)，所述遮光单元包括驱动单元11、第一遮光板15和两个第二遮光板10，所述驱动单元11与所述第一遮光板15固定在所述驱动基板12的遮光区121，所述第二遮光板10与所述驱动单元11连接，所述第一遮光板15介于两个所述第二遮光板10之间。
每个光阀装置200都对应着一个子像素，当两个相邻的透光区121对应的子像素需要透入背光光线时，所述第二遮光板10位于遮光区121，即此时光阀装置200处于开启状态，背光光线可以从所述透两个光区121直接进入驱动基板12，该像素不显示黑色；请参阅图3，当光阀装置200对应的子像素需要显示黑色时，在驱动单元11的驱动，两个所述第二遮光板10向所述第一遮光板15并拢，此时所述第二遮光板10正对所述透光区122，以挡住背光光线通过透光区122进入驱动基板12，即此时光阀装置200处于关闭状态，该光阀装置200对应的子像素完全关闭，与周围形成高对比度，提升显示效果。
进一步的，所述第二遮光板10与所述驱动单元11可以通过摆臂14连接
摆臂14可用热致变形器件(如形状记忆合金)、电致变形器件等为主要部件，摆臂14带动第二遮光板10旋转。更进一步的，为减少光能损失，提高光能利用率，可以在第一遮光板15、两个第二遮光板10和所述摆臂14上涂有高散射涂层，将射向该涂层的光线反射回背光光路，减少光能损失。
请参阅图4，本实施例还提供一种显示装置100，其包括多个子像素，子像素分为多种不同颜色，且每个子像素中设有一个光阀，其中至少部分光阀为上述的光阀装置200，显示装置100包括从上到依次设置的上偏光片8、彩膜基板7、液晶层6、TFT基板5、偏光片4、光阀装置200、增亮膜3、导光板2、反射片9。所述导光板2侧边设有背光光源1，所述光阀装置200设于所述增亮膜3和所述偏光片4之间，所述彩膜基板1用于将背光光源发出的光线透过彩膜基板1后能够实现图像的彩色化，所述彩膜基板1包括RGB彩膜层(即红色彩膜、绿色彩膜和蓝色彩膜)(图未示出)和矩阵分布的黑色 区域(黑矩阵)(未编号)，请参阅图5，所述黑矩阵包括多个黑矩阵阵元52，所述多个黑矩阵阵元52间隔一定距离设置在彩膜基板1上。所述驱动基板12遮光区121正对所述黑矩阵，所述驱动基板12透光区122正对所述黑矩阵阵元间的间隔53(即彩膜基板1上透光的部分)。显而易见的，驱动基板12的遮光区121和透光区122的个数、尺寸、形状、位置均与彩膜基板1的的黑矩阵阵元52和间隔53相匹配。
所述显示装置100还包括公共电极线(图未示出)、多条交叉设置的栅极线(图未示出)和数据线(图未示出)，栅极线和数据线的每个交叉处为一个像素，子像素还包括薄膜晶体管，薄膜晶体管的栅极连接栅极线，源极连接数据线，驱动单元11的输入端连接薄膜晶体管的漏极，输出端连接公共电极线。通过薄膜晶体管给驱动单元11提供驱动信号，这样即可独立控制各子像素显示的内容。
相应的，驱动基板12的遮光区121可以为任何不透光的结构，但从重量、成本、技术成熟度等方面考虑，其可为黑矩阵层，也就是说，可用彩膜基板1中的黑矩阵材料作为遮光区121，黑矩阵材料可以采用遮光性较强的金属或树脂。
请参阅图6，在第二个实施例的显示装置100中，所述光阀装置200设于所述增亮膜3和所述导光板2之间，其工作原理与第一个实施例的显示装置100类似，此处不再赘述。
请参阅图7，在第三个实施例的显示装置100中，所述光阀装置200设于所述反射片9和所述导光板2之间，当所述子像素需要显示黑色时，在驱动单元11的驱动，两个所述第二遮光板10向所述第一遮光板15并拢，所述第二遮光板10正对所述透光区122，以挡住背光光线通过透光区122进入反射片9，使得该处的子像素显示为黑色。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (12)

  1. 一种光阀置，包括具有遮光区和透光区的驱动基板，其中，所述光阀置还包括遮光单元，所述遮光单元包括第一遮光板、两个驱动单元，所述两个驱动单元各连接的一第二遮光板，所述驱动单元与所述第一遮光板固定在所述驱动基板相邻的的遮光区，所述第一遮光板介于两个所述驱动单元之间，所述驱动单元能够驱动两个所述第二遮光板向所述第一遮光板并拢，并使得所述第二遮光板与所述驱动基板的透光区相对，以阻止光线进入驱动基板。
  2. 如权利要求1所述的光阀置，其中，所述光阀置还包括摆臂，所述第二遮光板与所述驱动单元通过所述摆臂连接，所述驱动单元驱动所述摆臂带动所述第二遮光板在遮光区正对区域和透光区正对区域间旋转，完成所述光阀的状态切换。
  3. 如权利要求2所述的光阀置，其中，所述遮光板、所述驱动单元和所述摆臂表面涂有高散射涂层，以提高光能利用率。
  4. 一种显示面板，包括公共电极线、多个子像素，其中，每个子像素设有的光阀置，所述光阀置包括具有遮光区和透光区的驱动基板、遮光单元，所述遮光单元包括第一遮光板、两个驱动单元，所述两个驱动单元各连接的一第二遮光板，所述驱动单元与所述第一遮光板固定在所述驱动基板相邻的的遮光区，所述第一遮光板介于两个所述驱动单元之间，所述驱动单元能够驱动两个所述第二遮光板向所述第一遮光板并拢，并使得所述第二遮光板与所述驱动基板的透光区相对，以阻止光线进入驱动基板。所述子像素还包括薄膜晶体管，所述薄膜晶体管的漏极与所述驱动单元输入端连接，所述驱动单元输出端连接所述公共电极线。
  5. 如权利要求4所述的显示面板，其中，所述光阀置还包括摆臂，所述第二遮光板与所述驱动单元通过所述摆臂连接，所述驱动单元驱动所述摆臂带动所述第二遮光板在遮光区正对区域和透光区正对区域间旋转，完成所述光阀 的状态切换。
  6. 如权利要求5所述的显示面板，其中，所述遮光板、所述驱动单元和所述摆臂表面涂有高散射涂层，以提高光能利用率。
  7. 如权利要求4所述的显示面板，其中，所述显示面板还包括彩膜基板、增亮膜和下偏光片，所述下偏光片设于所述彩膜基板与所述增亮膜之间，所述光阀置介于所述增亮膜和所述下偏光片之间。
  8. 如权利要求7所述的显示面板，其中，所述彩膜基板上设有矩阵分布的黑色区域，所述驱动基板的遮光区与所述黑色区域相对设置。
  9. 如权利要求4所述的显示面板，其中，所述显示面板还包括彩膜基板、增亮膜和导光板，所述增亮膜设于所述彩膜基板与所述导光板之间，所述光阀
    置介于所述增亮膜和所述导光板之间。
  10. 如权利要求9所述的显示面板，其中，所述彩膜基板上设有矩阵分布的黑色区域，所述驱动基板的遮光区与所述黑色区域相对设置。
  11. 如权利要求4所述的显示面板，其中，所述显示面板还包括彩膜基板、导光板和反射片，所述导光板设于所述彩膜基板与所述反射片之间，所述光阀置介于所述反射片和所述导光板之间。
  12. 如权利要求11所述的显示面板，其中，所述彩膜基板上设有矩阵分布的黑色区域，所述驱动基板的遮光区与所述黑色区域相对设置。
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US20180267292A1 (en) 2018-09-20
US10007107B2 (en) 2018-06-26

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