WO2017090356A1 - 液晶表示装置 - Google Patents

液晶表示装置 Download PDF

Info

Publication number
WO2017090356A1
WO2017090356A1 PCT/JP2016/081433 JP2016081433W WO2017090356A1 WO 2017090356 A1 WO2017090356 A1 WO 2017090356A1 JP 2016081433 W JP2016081433 W JP 2016081433W WO 2017090356 A1 WO2017090356 A1 WO 2017090356A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
light
display device
crystal display
wavelength conversion
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/JP2016/081433
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
小間　徳夫
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.)
Polatechno Co Ltd
Original Assignee
Polatechno 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 Polatechno Co Ltd filed Critical Polatechno Co Ltd
Priority to KR1020187017688A priority Critical patent/KR20180084981A/ko
Priority to US15/772,717 priority patent/US20190204679A1/en
Priority to CN201680067464.1A priority patent/CN108351556A/zh
Publication of WO2017090356A1 publication Critical patent/WO2017090356A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • 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
    • 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
    • G02F1/133528—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
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured 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
    • G02F1/136—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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133565—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates

Definitions

  • the present invention relates to a liquid crystal display device.
  • a general liquid crystal display device is a non-light-emitting display device, in which light from a backlight using a white LED or the like as a light source is light-modulated for each pixel by a liquid crystal layer, and red (R) and green (G). , Blue (B) is transmitted through each color filter layer to perform color display.
  • the white LED has features such as good luminous efficiency and long life. On the other hand, the white LED has a large light loss due to a decrease in luminous efficiency of the phosphor due to heat generation (so-called temperature quenching). Also, because the color filter layer separates the light from the white LED into red, green and blue, only about 1/3 of the backlight is actually used, and the light utilization efficiency of the entire liquid crystal display device Is low.
  • a liquid crystal display device of a type that uses an ultraviolet light source as a backlight and emits phosphor layers of red, green and blue colors using the ultraviolet light source as excitation light.
  • a blue LED is used as a backlight, and red and green phosphor layers are emitted by using the blue light output from the blue LED to obtain red and green light, and the blue light from the blue LED is used as it is.
  • a liquid crystal display device of a type that transmits blue light and displays it is disclosed.
  • a liquid crystal display device that includes a subpixel including a phosphor layer that emits light, and a filter layer that reflects or absorbs light having a wavelength of 420 nm or less on a surface opposite to the liquid crystal layer of the phosphor layer. Has been.
  • the light use efficiency from the backlight can be improved. If the distance between the electrode and the display electrode is wide, it is necessary to increase the distance between the pixels in order to avoid color mixing between the pixels. Therefore, it is difficult to provide a high-resolution display device.
  • One aspect of the present invention is a liquid crystal display device in which a liquid crystal layer is sandwiched between two substrates, and includes a polarizing element that polarizes light between the two substrates, and the polarizing element Is a dye-based polarizing element using a dichroic dye, and is a liquid crystal display device comprising a wavelength conversion layer that converts the wavelength of light outward from the liquid crystal layer with respect to the polarizing element.
  • the light use efficiency of the liquid crystal display device can be improved, and a high resolution can be provided by narrowing the distance between the wavelength conversion layer and the polarizing element.
  • a liquid crystal display device 100 includes a polarizing layer 10, a TFT substrate 12, an interlayer insulating film 14, a display electrode 16, an alignment film 18, a liquid crystal layer 20, an alignment, as shown in the schematic cross-sectional view of FIG.
  • the film 22, the counter electrode 24, the polarizing plate (polarizing layer) 26, the wavelength conversion layer 28, the counter substrate 30, and the backlight 32 are included.
  • the liquid crystal display device 100 functions as a device that displays light by receiving light from the backlight 32 and outputting the light wavelength-converted by the wavelength conversion layer 28 from the polarizing layer 10 side, as indicated by arrows.
  • FIG. 1 is a schematic diagram, and the size and thickness of each component do not reflect actual values.
  • an active matrix liquid crystal display device is described as an example of the liquid crystal display device 100.
  • the scope of application of the present invention is not limited to this, and a liquid crystal display of another mode such as a simple matrix type is used. It is also applicable to the device.
  • the TFT substrate 12 is configured by arranging TFTs for each pixel on the substrate.
  • the substrate is a transparent substrate such as glass.
  • the substrate is used to mechanically support the liquid crystal display device 100 and to display an image by transmitting light.
  • the substrate may be a flexible substrate made of a resin such as an epoxy resin, a polyimide resin, an acrylic resin, or a polycarbonate resin.
  • a gate electrode 12a connected to the gate line is disposed at a lower portion (on the substrate) in the middle of the TFT.
  • a gate insulating film 12b is formed covering the gate electrode 12a, and a semiconductor layer 12c is formed covering the gate insulating film 12b.
  • the gate insulating film 12b is formed, for example, an insulator such as SiO 2.
  • the semiconductor layer 12c is formed of amorphous silicon or polysilicon, and a portion directly above the gate electrode 12a is a channel region having almost no impurities, and both sides are a source region and a drain region to which conductivity is imparted by impurity doping. Is done.
  • a contact hole is formed on the drain region of the TFT, and a metal (for example, aluminum) drain electrode is disposed (electrically connected) thereon, and a contact hole is formed on the source region, in which the metal is formed.
  • a source electrode for example, aluminum
  • the drain electrode is connected to a data line to which a data voltage is supplied.
  • the polarizing layer 10 is formed on the surface of the TFT substrate 12 where the TFT is not formed.
  • the polarizing layer 10 is formed so as to cover the surface of the TFT substrate 12.
  • the polarizing layer 10 preferably includes a dye-type polarizing element obtained by dyeing a PVA (polyvinyl alcohol) -based resin with an iodine-based material or a dichroic dye.
  • the polarizing layer 10 may be formed after the alignment film 18 is formed.
  • the display electrode 16 is provided on the surface of the TFT substrate 12 on the side where the TFT is formed, with an interlayer insulating film 14 interposed therebetween.
  • the display electrode 16 is an individual electrode separated for each pixel, and is a transparent electrode made of, for example, ITO (indium tin oxide).
  • the display electrode 16 is connected to a source electrode formed on the TFT substrate 12.
  • the alignment film 18 is formed so as to cover the display electrode 16.
  • the alignment film 18 is made of a resin material such as polyimide.
  • a resin material such as polyimide.
  • N-methyl-2-pyrrolidinone serving as a polyimide resin is printed on the display electrode 16 and cured by heating at about 180 ° C. to 280 ° C., followed by rubbing with a rubbing cloth. By performing the alignment treatment, it can be formed.
  • the counter substrate 30 is a transparent substrate such as glass.
  • the counter substrate 30 is used for mechanically supporting the liquid crystal display device 100 and transmitting light from the backlight 32 so as to enter the wavelength conversion layer 28 and the like.
  • the counter substrate 30 may be a flexible substrate made of a resin such as an epoxy resin, a polyimide resin, an acrylic resin, or a polycarbonate resin.
  • a wavelength conversion layer 28 is formed on the counter substrate 30.
  • the wavelength conversion layer 28 is arranged in a matrix in the in-plane direction of the counter substrate 30 for each pixel.
  • a phosphor that receives light from a backlight 32 described later and emits light in a specific wavelength region can be applied.
  • the phosphor is preferably made of a material that emits one of red (R), green (G), and blue (B) for each pixel.
  • Eu-activated sulfide-based red phosphor is used for the red phosphor
  • Eu-activated sulfide-based green phosphor is used for the green phosphor
  • Eu-activated phosphate-based blue phosphor is used for the blue phosphor. it can.
  • the wavelength conversion layer 28 may include a single phosphor or a plurality of phosphors depending on the color to be displayed.
  • pseudo white light when two types of phosphors that absorb light from the backlight 32 in the range of 380 nm to 420 nm and emit blue light and yellow light are included, pseudo white light can be obtained. .
  • white light can be obtained when three kinds of phosphors emitting red light, green light, and blue light are included.
  • light of any color can be obtained by appropriately selecting and using single or plural phosphors that absorb light from the backlight 32 having a peak wavelength in the range of 380 nm to 420 nm and emit light of any color.
  • a liquid crystal display device that can emit light is obtained.
  • the wavelength conversion layer 28 can also be realized by a quantum dot structure in which a plurality of semiconductor materials having different characteristics are periodically arranged. Quantum dots function as a material having a desired band gap by repeatedly arranging semiconductor materials having different bad gaps at a period of the order of nm, and receive light from the backlight 32 in accordance with the band gap. It can be used as a wavelength conversion layer 28 that emits light in a different wavelength region. Specifically, a quantum dot structure having a characteristic of absorbing light in the wavelength region of the output light of the backlight 32 and emitting any one of red (R), green (G), and blue (B). Form.
  • a polarizing plate 26 is formed on the wavelength conversion layer 28.
  • the polarizing plate 26 preferably includes a dye-type polarizing element obtained by dyeing a PVA (polyvinyl alcohol) resin with a dichroic dye.
  • the dye-based material preferably contains an azo compound and / or a salt thereof.
  • R1 and R2 each independently represent a hydrogen atom, a lower alkyl group, or a lower alkoxyl group, and n is an azo compound represented by 1 or 2, or a salt thereof.
  • R1 and R2 are each independently a hydrogen atom, a methyl group, or a methoxy group.
  • R1 and R2 are hydrogen atoms.
  • a material obtained in the following steps Add 13.7 parts of 4-aminobenzoic acid to 500 parts of water and dissolve with sodium hydroxide. The obtained material is cooled, 32 parts of 35% hydrochloric acid is added at 10 ° C. or lower, 6.9 parts of sodium nitrite is added, and the mixture is stirred at 5 to 10 ° C. for 1 hour. Thereto is added 20.9 parts of aniline- ⁇ -sodium methanesulfonate, and sodium carbonate is added to adjust the pH to 3.5 while stirring at 20-30 ° C. Furthermore, stirring is completed to complete the coupling reaction, and filtration is performed to obtain a monoazo compound. The obtained monoazo compound is stirred at 90 ° C. in the presence of sodium hydroxide to obtain 17 parts of a monoazo compound of the chemical formula (2).
  • a normal polarizing element is an iodine-based polarizing element formed of a material dyed on resin with iodine and an iodine compound.
  • iodine and iodine compounds are vulnerable to heat and are altered by heating at about 100 ° C.
  • a polarizing element using a dye is relatively resistant to heat and can be prevented from being altered by heating at about 130 ° C. Therefore, the polarizing plate 26 can be formed between the counter substrate 30 and the alignment film 22 without being affected by the film formation temperature when forming the alignment film 22 and the counter electrode 24 described later.
  • the counter electrode 24 is formed on the polarizing plate 26.
  • the counter electrode 24 is a transparent electrode made of, for example, ITO (indium tin oxide).
  • the alignment film 22 is formed on the counter electrode 24.
  • the alignment film 22 is made of a resin material such as polyimide.
  • a resin material such as polyimide.
  • a 5 wt% solution of N-methyl-2-pyrrolidinone serving as a polyimide resin is printed on the counter electrode 24, cured by heating at about 110 to 280 ° C., and then rubbed with a rubbing cloth. By performing the alignment treatment, it can be formed.
  • the alignment direction of the alignment film 22 is a direction orthogonal to the alignment direction of the alignment film 18.
  • the photo-alignment film it is possible to use a photo-alignment film. If the photo-alignment film is used, a low-temperature process of 130 ° C. or less is facilitated. In particular, when the IPS method is used, it is advantageous because the pretilt can be lowered.
  • the liquid crystal layer 20 is sealed between the alignment film 18 and the alignment film 22 so that the alignment film 18 and the alignment film 22 face each other.
  • a spacer (not shown) is inserted between the alignment film 18 and the alignment film 22, a liquid crystal is injected between the alignment film 18 and the alignment film 22, and the periphery is sealed with a sealing material (not shown).
  • the liquid crystal layer 20 is formed.
  • the alignment of the liquid crystal layer 20 is controlled by the alignment film 18 and the alignment film 22, and the initial alignment state of the liquid crystal in the liquid crystal layer 20 (when no electric field is applied) is determined by the alignment film 18 and the alignment film 22. Then, by applying a voltage between the display electrode 16 and the counter electrode 24, an electric field is generated between the display electrode 16 and the counter electrode 24, and the orientation of the liquid crystal layer 20 is controlled to transmit / transmit light. Is controlled.
  • the backlight 32 includes a light source that outputs light.
  • the light source is preferably an LED, for example.
  • the wavelength of light output from the backlight 32 is preferably light in a wavelength region that can be effectively used for wavelength conversion in the wavelength conversion layer 28.
  • the backlight 32 is preferably a light source that outputs light in a wavelength region having a peak wavelength of 380 nm to 420 nm or a light source that outputs light in a wavelength region of 380 nm or less.
  • the light utilization efficiency can be increased by converting the light from the backlight 32 by using the wavelength conversion layer 28 for wavelength conversion. Accordingly, energy efficiency in the liquid crystal display device 100 can be improved, and the liquid crystal display device 100 with low power consumption can be realized.
  • the power consumption can be further reduced as compared with the case of using a phosphor.
  • the wavelength conversion layer 28 can also be provided between the counter substrate 30 and the liquid crystal layer 20.
  • the distance between the illuminant, the display electrode 16 and the TFT substrate 12 can be made closer than before.
  • the counter substrate 30 has a thickness of about 500 ⁇ m
  • the wavelength conversion layer 28 is formed by the thickness of the counter substrate 30 and the display electrode 16 and the thickness of the counter substrate 30 as compared with the case where the polarizing plate 26 is formed between the counter substrate 30 and the backlight 32. It can be brought close to the TFT substrate 12. As a result, it is possible to reduce the margin of the distance between the pixels in order to avoid color mixing between the pixels. Therefore, the high-resolution liquid crystal display device 100 can be provided.
  • the liquid crystal display device 200 in the present embodiment has a structure in which the backlight 32 is provided on the counter substrate 30 side and the counter substrate 30 is the output side. That is, as indicated by the arrow, the liquid crystal display device 200 receives light from the backlight 32, receives transmission / non-transmission control by the liquid crystal layer 20, etc., and then receives the light subjected to wavelength conversion by the wavelength conversion layer 28. It functions as a device that outputs from the polarizing layer 10 side and displays an image. Note that FIG. 2 is a schematic diagram, and the size and thickness of each component do not reflect actual values.
  • the configuration from the polarizing layer 10 to the counter substrate 30 can be formed in the same manner as in the first embodiment, and thus description thereof is omitted.
  • the cut filter 34 is a filter that blocks light in a wavelength region that is affected by wavelength conversion in the wavelength conversion layer 28. Specifically, the cut filter 34 is preferably a filter that blocks light in a wavelength region of 420 nm or less.
  • the light utilization efficiency can be increased by converting the wavelength of the light from the backlight 32 in the wavelength conversion layer 28 and using it. Accordingly, the energy efficiency of the liquid crystal display device 200 can be improved, and the liquid crystal display device 200 with low power consumption can be realized.
  • the power consumption can be further reduced as compared with the case of using a phosphor.
  • display characteristics close to those of a light-emitting display can be obtained.
  • the viewing angle dependency can be reduced.
  • the wavelength conversion layer 28 can also be provided between the counter substrate 30 and the liquid crystal layer 20.
  • the distance between the illuminant, the display electrode 16 and the TFT substrate 12 can be made closer than before. As a result, it is possible to reduce the margin of the distance between the pixels in order to avoid color mixing between the pixels. Therefore, the high-resolution liquid crystal display device 200 can be provided.
  • the cut filter 34 by providing the cut filter 34, the visibility in the outdoors can be improved.
  • the polarizing plate 26 of Example 2 is a dichroic dye capable of making light of a short wavelength into polarized light according to the emission spectrum of the light source used, for example, a dye composed of a single orange dye O-2GL. If a system polarizing layer is used, it is possible to realize a high polarization characteristic as compared with a mixed dye-based polarizing layer, and display with a high contrast can be realized. The same can be said for the polarizing layer 10.

Landscapes

  • 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)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)
PCT/JP2016/081433 2015-11-27 2016-10-24 液晶表示装置 Ceased WO2017090356A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020187017688A KR20180084981A (ko) 2015-11-27 2016-10-24 액정 표시 장치
US15/772,717 US20190204679A1 (en) 2015-11-27 2016-10-24 Liquid crystal display device
CN201680067464.1A CN108351556A (zh) 2015-11-27 2016-10-24 液晶显示装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-231337 2015-11-27
JP2015231337A JP2017097251A (ja) 2015-11-27 2015-11-27 液晶表示装置

Publications (1)

Publication Number Publication Date
WO2017090356A1 true WO2017090356A1 (ja) 2017-06-01

Family

ID=58763362

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/081433 Ceased WO2017090356A1 (ja) 2015-11-27 2016-10-24 液晶表示装置

Country Status (7)

Country Link
US (1) US20190204679A1 (https=)
JP (1) JP2017097251A (https=)
KR (1) KR20180084981A (https=)
CN (1) CN108351556A (https=)
HK (1) HK1252219A1 (https=)
TW (1) TW201728982A (https=)
WO (1) WO2017090356A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12293729B2 (en) * 2022-06-17 2025-05-06 Stmicroelectronics (Grenoble 2) Sas Optoelectronic device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015275A1 (ja) * 2003-08-07 2005-02-17 Nippon Kayaku Kabushiki Kaisha 染料系偏光板
JP2005274674A (ja) * 2004-03-23 2005-10-06 Seiko Epson Corp 液晶表示装置および電子機器
JP2006309219A (ja) * 2005-04-25 2006-11-09 Samsung Electronics Co Ltd 自発光液晶表示装置
JP2008090298A (ja) * 2007-09-10 2008-04-17 Toshiba Corp 発光装置
JP2009116050A (ja) * 2007-11-07 2009-05-28 Hitachi Displays Ltd 液晶表示装置
JP2010250259A (ja) * 2009-03-27 2010-11-04 Epson Imaging Devices Corp 液晶表示装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08171013A (ja) * 1994-12-15 1996-07-02 Toppan Printing Co Ltd 液晶表示素子
JP2003035819A (ja) * 2001-07-24 2003-02-07 Sumitomo Chem Co Ltd 偏光フィルム、偏光板及びそれらの表示装置への適用
JP2003255320A (ja) * 2002-02-28 2003-09-10 Hitachi Ltd 液晶表示装置
JP2004094039A (ja) * 2002-09-02 2004-03-25 Hitachi Ltd 液晶表示装置
US20070141244A1 (en) * 2005-12-19 2007-06-21 Eastman Kodak Company Method of making a polarizer plate
KR101592481B1 (ko) * 2009-02-06 2016-02-05 삼성전자 주식회사 액정 표시 장치 및 그 제조 방법
US9361856B2 (en) * 2013-01-18 2016-06-07 Google Inc. Liquid crystal display with photo-luminescent material layer
CN103412435B (zh) * 2013-07-24 2015-11-25 北京京东方光电科技有限公司 一种液晶显示屏及显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015275A1 (ja) * 2003-08-07 2005-02-17 Nippon Kayaku Kabushiki Kaisha 染料系偏光板
JP2005274674A (ja) * 2004-03-23 2005-10-06 Seiko Epson Corp 液晶表示装置および電子機器
JP2006309219A (ja) * 2005-04-25 2006-11-09 Samsung Electronics Co Ltd 自発光液晶表示装置
JP2008090298A (ja) * 2007-09-10 2008-04-17 Toshiba Corp 発光装置
JP2009116050A (ja) * 2007-11-07 2009-05-28 Hitachi Displays Ltd 液晶表示装置
JP2010250259A (ja) * 2009-03-27 2010-11-04 Epson Imaging Devices Corp 液晶表示装置

Also Published As

Publication number Publication date
TW201728982A (zh) 2017-08-16
CN108351556A (zh) 2018-07-31
KR20180084981A (ko) 2018-07-25
JP2017097251A (ja) 2017-06-01
US20190204679A1 (en) 2019-07-04
HK1252219A1 (zh) 2019-05-24

Similar Documents

Publication Publication Date Title
CN105204103B (zh) 量子点彩色滤光片及液晶显示装置
CN103969862B (zh) 透明液晶显示设备
CN105093643B (zh) 彩色发光元件及液晶显示装置
WO2016155091A1 (zh) 液晶显示器
US11320690B2 (en) Color filter substrate and method of manufacturing the same, liquid crystal display panel, and liquid crystal display apparatus
JP2016070949A (ja) 表示装置
JP5226935B2 (ja) 液晶表示装置
WO2017045236A1 (zh) 液晶显示装置
CN103353689A (zh) 光阀器件、红外显示装置、专用眼镜及系统
US10254587B2 (en) Liquid crystal display apparatus and method of manufacturing the same
JP2016133730A (ja) 表示装置
KR102016958B1 (ko) 액정표시장치 및 그 제조방법
WO2018230393A1 (ja) 液晶表示装置及び反射シート
CN104570480A (zh) 一种液晶显示装置
WO2019176473A1 (ja) 表示装置
KR20080100953A (ko) 액정 표시 장치
JP2011118139A (ja) カラーフィルタ基板および液晶表示装置
KR20010108616A (ko) 반사형 액정표시장치 및 그의 제조방법
WO2017090356A1 (ja) 液晶表示装置
WO2018230302A1 (ja) 液晶表示装置
JP7094272B2 (ja) 液晶表示装置およびその製造方法
CN119987074B (zh) 显示面板及显示装置
WO2018198735A1 (ja) 液晶表示装置及び偏光板
KR102130553B1 (ko) 액정표시장치
KR102800902B1 (ko) 편광층을 이용한 표시 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16868305

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20187017688

Country of ref document: KR

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 16868305

Country of ref document: EP

Kind code of ref document: A1