WO2019058758A1 - 光学システム及び表示装置 - Google Patents

光学システム及び表示装置 Download PDF

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Publication number
WO2019058758A1
WO2019058758A1 PCT/JP2018/028162 JP2018028162W WO2019058758A1 WO 2019058758 A1 WO2019058758 A1 WO 2019058758A1 JP 2018028162 W JP2018028162 W JP 2018028162W WO 2019058758 A1 WO2019058758 A1 WO 2019058758A1
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WO
WIPO (PCT)
Prior art keywords
light
liquid crystal
display device
polarizing plate
crystal cell
Prior art date
Application number
PCT/JP2018/028162
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English (en)
French (fr)
Japanese (ja)
Inventor
典明 望月
Original Assignee
日本化薬株式会社
株式会社ポラテクノ
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
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Application filed by 日本化薬株式会社, 株式会社ポラテクノ filed Critical 日本化薬株式会社
Priority to KR1020207008266A priority Critical patent/KR20200057713A/ko
Priority to JP2019543455A priority patent/JP7182552B2/ja
Priority to CN201880060210.6A priority patent/CN111133347B/zh
Publication of WO2019058758A1 publication Critical patent/WO2019058758A1/ja

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/26—Reflecting filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising 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
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing

Definitions

  • the present invention relates to an optical system and a display device, and in particular, as a polarizing element, a polarized light emitting element having a function of causing polarized light to emit light in the visible light range using ultraviolet light, or controlling the ultraviolet light to be polarized
  • the present invention relates to an optical system and a display including a polarization control element having a function.
  • a liquid crystal display which is one of the representative examples of display devices, is widely used every year because of its thinness, lightness, and low power consumption.
  • the basic structure of a liquid crystal display device is a light source called a backlight, two polarizing plates that allow only light in one direction to pass, and a liquid crystal cell containing a liquid crystal material disposed between the two polarizing plates. It has a built-in configuration.
  • Patent Document 1 discloses a method of obtaining polarized light emission by mixing a fluorescent substance with liquid crystal molecules and orienting the liquid crystal by an electric field and at the same time performing electroluminescence.
  • Patent Document 2 discloses an organic EL element having an optical element using a liquid crystal material and a light emitting layer made of an organic EL material.
  • Patent Literatures 1 and 2 discloses an image display device using a polarized light emitting element that exhibits polarized light emission by itself.
  • Patent Document 3 discloses an image display device using a polymerizable liquid crystal compound in which the polymerizable liquid crystal compound itself emits light, and additionally shows that the polymerizable liquid crystal compound can be used as a material of a polarized light emitting element. .
  • the polymerizable liquid crystal compound can be used as a material of a polarized light emitting element.
  • a transparent display see-through display
  • a background disposed on the back side of the display can be seen through.
  • Such a transparent display has a feature in which an image such as an image, a moving image, or a character is displayed on the transparent display, and the scenery on the back side of the display can be seen through.
  • OLEDs organic light emitting diodes
  • liquid crystal displays are used for transparent displays.
  • a back light is not necessary because a light emitting element that emits light by itself is used for the OLED, but it is difficult and expensive to manufacture.
  • a transparent display with a liquid crystal display since a polarizing plate having a transmittance of 30 to 45% in the visible light region is generally used for the liquid crystal display, the visible transmittance inevitably decreases. As a result, there was a problem that visibility decreased.
  • the present invention is a novel optical system capable of displaying images, moving images, stereoscopic vision, stereoscopic images, etc. while having high transparency in the visible light range by using ultraviolet light. It aims at providing a display.
  • An aspect of the present invention is an optical system provided with a polarizing element,
  • the polarizing element is provided as a polarized light emitting element that emits polarized light to light in the visible light range by absorption of light containing at least ultraviolet light, or at least light in the ultraviolet light range of light containing at least the ultraviolet light
  • the embodiment of the present invention is characterized in that the polarizing element is provided as a polarized light emitting element, and the polarized light emitting element has a visibility correction single transmittance of 60% or more in a wavelength range of 380 nm to 780 nm. It is an optical system as described in these.
  • An aspect of the present invention is the above-mentioned optical system according to the above (1) or (2), further comprising a light source emitting light including at least ultraviolet light.
  • An aspect of the present invention is a display device provided with the optical system according to any one of the above (1) to (3).
  • An aspect of the present invention is a liquid crystal display device including the polarizing element as a polarized light emitting element, and the display device further including a liquid crystal cell, The light is emitted from one side of the liquid crystal cell, The polarized light emitting element is disposed on the other side of the liquid crystal cell, and The display device according to (4), wherein the light is polarized ultraviolet light.
  • An aspect of the present invention is the display device according to (5), further including a light source that emits polarized ultraviolet light.
  • An aspect of the present invention is a liquid crystal display device, wherein the polarizing element is provided as a polarized light emitting element, and the display device further includes a liquid crystal cell and a polarizing plate, The light is emitted from one side of the liquid crystal cell, The polarized light emitting element is disposed on the other side of the liquid crystal cell, and The polarizing plate having at least one of a polarizing plate O-UVP for polarizing ultraviolet light and a polarizing plate V + UVP for polarizing both ultraviolet light and visible light on one surface side of the liquid crystal cell to which the light is irradiated It is a display as described in said (4) arrange
  • An aspect of the present invention is the display device according to the above (7), further including a light source emitting light including at least ultraviolet light.
  • the liquid crystal display device further includes at least one light control layer selected from the group consisting of a light absorption layer, a light reflection layer, and a retardation plate, and The display device according to any one of (5) to (8), wherein the at least one light control layer is disposed on the surface side of the polarized light emitting element in which the liquid crystal cell is not disposed.
  • the liquid crystal display device includes a light reflection layer and a retardation plate, and the retardation plate is disposed between the light reflection layer and the polarized light emitting element. It is a display apparatus as described in (9).
  • the polarizing element is provided as a polarized light emitting element
  • the display device is a liquid crystal cell, an ultraviolet light absorbing element, and a polarizing plate O-UVP for polarizing ultraviolet light, ultraviolet
  • the polarizing element is provided as a polarized light emitting element
  • the display device is a liquid crystal cell, a polarizing plate O-UVP that polarizes ultraviolet light, and polarizes both ultraviolet light and visible light.
  • a liquid crystal display device further comprising at least one polarizing plate selected from the group consisting of: a polarizing plate V + UVP, a UV transmitting polarizing plate transmitting ultraviolet light, and a UV non-transmitting polarizing plate transmitting no ultraviolet light; ,
  • One of the polarizing plates has an absorption axis in the direction orthogonal to the polarization axis of the polarized light emitting element, or
  • An aspect of the present invention is a liquid crystal display device provided as a polarization control element, and the display device further comprising a liquid crystal cell,
  • the liquid crystal display device may further include a polarizing plate V + UVP for polarizing both ultraviolet light and visible light, and a UV transmission polarizing plate for transmitting ultraviolet light, or at least two of the polarizing plates V + UVP.
  • the light is emitted from one side of the liquid crystal cell,
  • the polarization control element is disposed on the other surface side of the liquid crystal cell; Whether the UV transmission polarizing plate is disposed on the side of the polarization control element on which the polarizing plate V + UVP is disposed on one side of the liquid crystal cell to which the light is irradiated and the liquid crystal cell is not disposed Or
  • One polarizing plate V + UVP is disposed on one side of the liquid crystal cell to which the light is irradiated, and the other polarizing plate V + UVP is disposed on the side of the polarization control element on which the liquid crystal cell is not disposed Yes
  • the UV transmission polarizing plate or the other polarizing plate V + UVP has an absorption axis in a direction different from the polarization axis of the polarization control element, and
  • the display device according to (4), wherein the light is light including ultraviolet light and visible light.
  • the aspect of the present invention is the display device according to (13), further including a light source that emits light including ultraviolet light and visible light.
  • a mode of the present invention is a liquid crystal display device, wherein the polarizing element is provided as a polarization control element, and the display device further includes a liquid crystal cell and a polarizing plate V + UVP which polarizes both ultraviolet light and visible light.
  • the polarization control element is disposed on one side of the liquid crystal cell;
  • the polarizing plate V + UVP is disposed on the side of the polarization control element where the liquid crystal cell is not disposed,
  • the polarizing plate V + UVP has an absorption axis in a direction different from the polarization axis of the polarization control element,
  • the liquid crystal cell is switchable to a liquid crystal cell for ultraviolet light and a liquid crystal cell for visible light, or has both the liquid crystal cell for ultraviolet light and the liquid crystal cell for visible light, and
  • the display device according to (4), wherein the light is light obtained by polarizing both ultraviolet light and visible light.
  • a mode of the present invention is a display given in the above (15) which further has a light source which emits light which polarized both ultraviolet light and visible light.
  • the polarizing element is provided as a polarized light emitting element
  • the display device further includes a stereoscopic display control means for enabling stereoscopic vision or display of a stereoscopic image.
  • Image display device The stereoscopic display device further includes a display unit for displaying a stereoscopic view;
  • the polarizing element is provided as a polarized light emitting element
  • the display device is a retardation control member capable of controlling a phase difference, and polarized light for controlling polarized light emission from the polarized light emitting element. It is a display given in the above (4) which is a display which has a polarization change function further provided with a control member.
  • An aspect of the present invention is the display device according to the above (18), further including a light source that emits light including at least ultraviolet light.
  • the polarizing element is provided as a polarized light emitting element, and the display device polarizes a liquid crystal cell, a colored light transmission filter, a polarizing plate for 400 to 480 nm, and ultraviolet light.
  • a polarizer selected from the group consisting of a polarizer O-UVP, a polarizer V + UVP that polarizes both ultraviolet light and visible light, a UV transmission polarizer that transmits ultraviolet light, and a UV non-transmission polarizer that does not transmit ultraviolet light
  • a display device which is a liquid crystal display device.
  • An aspect of the present invention is the display device according to (20), further including a light source that emits light including at least ultraviolet light.
  • the absolute value of chromaticity a * measured according to JIS Z 8781-4: 2013 is 5 or less, and the absolute value of hue b * is 5 or less It is a display as described in said (21) which shows a certain luminescent color.
  • An aspect of the present invention is that the polarized light emitting element exhibits blue emission having a maximum emission wavelength in the wavelength range of 400 to 480 nm, and The display device according to (22), wherein the colored light transmission filter has at least one color filter that absorbs blue light of 400 to 480 nm and emits fluorescence in the wavelength range of 530 to 670 nm. .
  • the aspect of the present invention is the display device according to the above (23), wherein at least one of the color filters has a maximum emission wavelength in a wavelength range of 530 to 570 nm.
  • the aspect of the present invention is the display device according to (23), wherein at least one of the color filters has a maximum emission wavelength in a wavelength range of 600 to 650 nm.
  • the colored light transmission filter has a color filter having a maximum emission wavelength in a wavelength range of 530 to 570 nm and a color filter having a maximum emission wavelength in a wavelength range of 600 to 650 nm. It is a display as described in said (23).
  • the light is irradiated from one surface side of the liquid crystal cell
  • the colored light transmission filter is disposed in the liquid crystal cell or on the other side of the liquid crystal cell.
  • the polarizing plate is disposed on one side of the liquid crystal cell to which the light is irradiated,
  • the light is irradiated from one surface side of the liquid crystal cell
  • the colored light transmission filter is disposed in the liquid crystal cell or on the other side of the liquid crystal cell.
  • the polarized light emitting element is disposed on one side of the liquid crystal cell to which the light is irradiated;
  • the polarizing plate is disposed on the other side of the liquid crystal cell, and Any of the above (20) to (26), wherein the polarizing plate is selected from the group consisting of the polarizing plate for 400-480 nm, the polarizing plate V + UVP, the UV transmitting polarizing plate, and the UV non-transmitting polarizing plate It is a display device described in.
  • the polarizing element has a substrate and one or more dichroic dyes, and the dichroic dyes have at least one of a stilbene skeleton and a biphenyl skeleton in the molecule.
  • the optical system according to any one of the above (1) to (3), or a compound having no azo group or a salt thereof, or any one of the above (4) to (28) It is a display apparatus of a statement.
  • the polarizing element in the optical system provided with the polarizing element, is provided as a polarized light emitting element that emits polarized light to light in the visible light range by absorption of light containing at least ultraviolet light In the light containing at least ultraviolet light, it is provided as a polarization control element that controls light of at least the ultraviolet light region to be polarized.
  • a novel optical system capable of displaying images, moving image stereoscopic vision, stereoscopic images and the like while having high transparency in the visible light range using ultraviolet light.
  • the polarizing element since the polarizing element is provided as a polarized light emitting element, the polarized light emitting element can emit light by ultraviolet light. As a result, such an optical system can be applied to displays and various media that require high security.
  • the polarizing element is provided as a polarized light emitting element, and the polarized light emitting element has a visibility correction single transmittance of 60% or more in the wavelength range of 380 nm to 780 nm.
  • This can provide an optical system having a novel structure suitable for transparent display.
  • the display device when the display device includes the above-described optical system, it can be manufactured by applying the display configuration of the conventional display device, so that it can be manufactured easily and inexpensively.
  • the polarizing element is provided as a polarized light emitting element
  • the display is a liquid crystal display further comprising a liquid crystal cell.
  • polarized ultraviolet light is irradiated from one surface side of the liquid crystal cell, and the polarized light emitting element is disposed on the other surface side of the liquid crystal cell.
  • the light absorbed by the polarized light emitting element is polarized ultraviolet light, and the polarization of the ultraviolet light is controlled, and the anisotropy of absorption is utilized, and the polarized light emitting element emits polarized light. Since the extinction can be controlled, polarized light can be used to display an image.
  • a polarizing element is provided as a polarized light emitting element
  • a display device is a liquid crystal display device further comprising a liquid crystal cell and a polarizing plate. Further, light containing at least ultraviolet light is irradiated from one surface side of the liquid crystal cell, and the polarized light emitting element is disposed on the other surface side of the liquid crystal cell, and one of the liquid crystal cells to which light is irradiated.
  • a polarizing plate having at least one of a polarizing plate O-UVP for polarizing ultraviolet light and a polarizing plate V + UVP for polarizing both ultraviolet light and visible light is disposed.
  • the polarized light emitting element that absorbs polarized ultraviolet light obtained by the polarizing plate can control emission and extinction of polarized light, so that it is possible to display an image using polarized light emission.
  • the liquid crystal display device further includes at least one light control layer selected from the group consisting of a light absorption layer, a light reflection layer, and a retardation plate, and no liquid crystal cell is disposed. At least one light control layer is disposed on the surface side of the polarized light emitting element.
  • the liquid crystal display device includes a light reflection layer and a retardation plate, and the retardation plate is disposed between the light reflection layer and the polarized light emitting element.
  • the polarizing element is provided as a polarized light emitting element
  • the display device is a liquid crystal cell, an ultraviolet light absorbing element, a polarizing plate O-UVP for polarizing ultraviolet light, ultraviolet light and visible light
  • the liquid crystal display device further includes at least one polarizing plate selected from the group consisting of a polarizing plate V + UVP that polarizes both of light and a UV transmitting polarizing plate that transmits ultraviolet light.
  • the ultraviolet light absorbing element can absorb the ultraviolet light transmitted through the polarized light emitting element without being absorbed by the polarized light emitting element.
  • ultraviolet light that may be incident from the outside of the display device can also be absorbed, adverse effects of ultraviolet light on the eye can be prevented.
  • the polarizing element is provided as a polarized light emitting element
  • the display device is a liquid crystal cell, a polarizing plate O-UVP for polarizing ultraviolet light, and a polarizing plate for polarizing both ultraviolet light and visible light
  • the liquid crystal display device is further provided with at least one polarizing plate selected from the group consisting of V + UVP, a UV transmitting polarizing plate transmitting ultraviolet light, and a UV non-transmitting polarizing plate transmitting no ultraviolet light.
  • V + UVP a UV transmitting polarizing plate transmitting ultraviolet light
  • a UV non-transmitting polarizing plate transmitting no ultraviolet light.
  • it is preferable that one of the polarizing plates has an absorption axis in the direction orthogonal to the polarization axis of the polarized light emitting element.
  • the absorption axis of the polarizing plate is provided in the direction different from the polarization axis of the polarized light emitting element.
  • a polarized light emitting element that absorbs polarized ultraviolet light exhibits polarized light emission, and an image can be displayed using the polarized light emission.
  • the polarizing element is provided as a polarization control element
  • the display is a liquid crystal display further comprising a liquid crystal cell.
  • the liquid crystal display device further includes a polarizing plate V + UVP for polarizing both ultraviolet light and visible light, and a UV transmitting polarizing plate for transmitting ultraviolet light, or at least two polarizing plates V + UVP.
  • light including ultraviolet light and visible light is irradiated from one surface side of the liquid crystal cell, and the polarization control element is disposed on the other surface side of the liquid crystal cell.
  • a UV transmission polarizing plate is disposed on the side of the polarization control element where the polarizing plate V + UVP is disposed on one side of the liquid crystal cell to which light is emitted and the liquid crystal cell is not disposed, or One polarizing plate V + UVP is disposed on one side of the liquid crystal cell to be irradiated, and the other polarizing plate V + UVP is disposed on the side of the polarization control element on which the liquid crystal cell is not disposed. Furthermore, the UV transmission polarizing plate or the other polarizing plate V + UVP has an absorption axis in a direction different from the polarization axis of the polarization control element. With such a display device, an image can be displayed using the function of controlling polarization of ultraviolet light by a polarizing element.
  • the polarizing element is provided as a polarization control element
  • the display device further includes a liquid crystal cell and a polarizing plate V + UVP that polarizes both ultraviolet light and visible light, and is utilized by being irradiated Light is light obtained by polarizing both ultraviolet light and visible light.
  • the polarization control element is disposed on one side of the liquid crystal cell
  • the polarizer V + UVP is disposed on the side of the polarization control element on which the liquid crystal cell is not disposed.
  • the polarizing plate V + UVP has an absorption axis in a direction different from the polarization axis of the polarization control element.
  • the liquid crystal cell can be switched to a liquid crystal cell for ultraviolet light and a liquid crystal cell for visible light, or has both a liquid crystal cell for ultraviolet light and a liquid crystal cell for visible light.
  • a display device it is possible to simultaneously control polarization of light in the visible light region and polarization control of light in the ultraviolet light region, and provide a display device capable of controlling transmission and non-transmission of light in the respective wavelength regions. For example, it can be applied to an ultraviolet sensor that controls transmission and shielding of ultraviolet light.
  • the polarizing element is provided as a polarized light emitting element
  • the display device further includes a stereoscopic display control means for enabling stereoscopic vision or display of a stereoscopic image.
  • the stereoscopic display device further includes a display unit for displaying stereoscopic vision
  • the stereoscopic image display device further includes a liquid crystal cell for displaying a stereoscopic image.
  • the polarizing element is provided as a polarized light emitting element
  • the display device includes a phase difference controlling member capable of controlling a phase difference, and a polarization controlling member controlling polarized light emission from the polarized light emitting element. And a polarization switching function.
  • a display device can provide a display device capable of providing high security as well as recognizing polarized light emission.
  • the polarizing element is provided as a polarized light emitting element
  • the display device is a liquid crystal cell, a colored light transmission filter, a polarizing plate for 400 to 480 nm, and a polarizing plate O for polarizing ultraviolet light.
  • a polarizing plate selected from the group consisting of:-UVP, a polarizing plate V + UVP for polarizing both ultraviolet light and visible light, a UV transmitting polarizing plate transmitting ultraviolet light, and a UV non-transmitting polarizing plate not transmitting ultraviolet light; It is a liquid crystal display further provided. With such a display device, it is possible to improve the viewing angle dependency which has been a problem in the conventional liquid crystal display device, and to provide a self-luminous liquid crystal display device having high contrast and high color rendering. .
  • the polarized light emitting element emits light whose absolute value of chromaticity a * measured according to JIS Z 8781-4: 2013 is 5 or less and whose absolute value of hue b * is 5 or less Show the color.
  • the polarized light emitting element can be used as a white polarized light emitting polarization element.
  • colored light transmission filters red, blue and green color filters are provided for each display segment to be electrically driven in the liquid crystal cell, and white light is emitted to each color filter to color each display segment. It becomes possible to provide a self-luminous liquid crystal display device capable of display.
  • the polarized light emitting element emits blue light having a maximum emission wavelength in the wavelength range of 400 to 480 nm.
  • the colored light transmission filter has at least one color filter that absorbs blue light of 400 to 480 nm and emits fluorescence in the wavelength range of 530 to 670 nm.
  • At least one of the color filters has the maximum emission wavelength in the wavelength range of 530 to 570 nm, whereby polarization is achieved via the color filter even if the emission color by the polarized light emitting element is blue. It becomes possible to provide a self-luminous liquid crystal display device capable of converting blue luminescence from a light emitting element into green luminescence.
  • At least one of the color filters has the maximum emission wavelength in the wavelength range of 600 to 650 nm, whereby polarization is achieved via the color filter even if the emission color by the polarized light emitting element is blue. It becomes possible to provide a self-luminous liquid crystal display device capable of converting blue luminescence from a light emitting element into red luminescence.
  • the colored light transmission filter includes a color filter having a maximum emission wavelength in a wavelength range of 530 to 570 nm and a color filter having a maximum emission wavelength in a wavelength range of 600 to 650 nm.
  • a self-emission liquid crystal display device capable of converting blue light emission from a polarized light-emitting element into both green light emission and red light emission.
  • light containing at least ultraviolet light is irradiated from one side of the liquid crystal cell
  • the colored light transmission filter is disposed in the liquid crystal cell or the other side of the liquid crystal cell
  • the light is
  • the polarizing plate O-UVP is disposed between one side of the liquid crystal cell to be irradiated
  • the polarized light emitting element is disposed on the other side of the liquid crystal cell.
  • a liquid crystal cell for dynamically controlling the phase is provided between the polarizing plate O-UVP and the polarized light emitting element. Non-emission can be controlled by the liquid crystal cell.
  • the colored light transmission filter in the liquid crystal cell or on the other surface side of the liquid crystal cell, it is possible to convert the emission color from the polarized light emitting element to a desired color through the colored light transmission filter. it can. Furthermore, when the polarized light emitting element emits blue light, it is possible to provide a self-luminous liquid crystal display device with high utilization efficiency of blue light without using a blue color filter as a colored light transmission filter.
  • the colored light transmission filter is disposed in the liquid crystal cell or the other side of the liquid crystal cell, and the light is The polarized light emitting element is disposed on one side of the liquid crystal cell to be irradiated, and the polarizing plate is disposed on the other side of the liquid crystal cell.
  • the polarizing plate is selected from the group consisting of a polarizing plate for 400-480 nm, a polarizing plate V + UVP, a UV transmitting polarizing plate, and a UV non-transmitting polarizing plate.
  • polarized light emitted from the polarized light emitting element is irradiated to the colored light transmission filter through the polarizing plate, so that it is possible to provide a high-contrast self-emission liquid crystal display device.
  • the polarized light emitting element emits blue light, it is possible to provide a self-luminous liquid crystal display device with extremely high utilization efficiency of blue light without using a blue color filter as a colored light transmission filter.
  • the polarizing element has a substrate and one or more dichroic dyes, and preferably the dichroic dye has at least one of a stilbene skeleton and a biphenyl skeleton in the molecule. And a compound not having an azo group or a salt thereof.
  • the polarizing element can be provided with a function as a polarized light emitting element or a polarization control element.
  • FIG. 1 is a schematic view showing an optical system according to the present invention.
  • FIG. 2 is a schematic view showing a first embodiment of the liquid crystal display device according to the present invention.
  • FIG. 3 is a schematic view showing a second embodiment of the liquid crystal display device according to the present invention.
  • FIG. 4 is a schematic view showing a third embodiment of the liquid crystal display device according to the present invention.
  • FIG. 5 is a schematic view showing a fourth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 6 is a schematic view showing a fifth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 7 is a schematic view showing a sixth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 1 is a schematic view showing an optical system according to the present invention.
  • FIG. 2 is a schematic view showing a first embodiment of the liquid crystal display device according to the present invention.
  • FIG. 3 is a schematic view showing a second embodiment of the liquid crystal display device according to the present invention.
  • FIG. 8 is a schematic view showing a seventh embodiment of the liquid crystal display device according to the present invention.
  • FIG. 9 is a schematic view showing an eighth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 10 is a schematic view showing a ninth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 11 is a schematic view showing a tenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 12 is a schematic view showing an eleventh embodiment of the liquid crystal display device according to the present invention.
  • FIG. 13 is a schematic view showing a twelfth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 14 is a schematic view showing a thirteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 14 is a schematic view showing a thirteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 15 is a schematic view showing a fourteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 16 is a schematic view showing a fifteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 17 is a schematic view showing a sixteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 18 is a schematic view showing a seventeenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 19 is a schematic view showing an eighteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 20 is a schematic view showing a nineteenth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 21 is a schematic view showing a twentieth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 22 is a schematic view showing a twenty-first embodiment of the liquid crystal display device according to the present invention.
  • FIG. 23 is a schematic view showing a twenty-second embodiment of the liquid crystal display device according to the present invention.
  • FIG. 24 is a schematic view showing a twenty-third embodiment of the liquid crystal display device according to the present invention.
  • FIG. 25 is a schematic view showing a twenty-fourth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 26 is a schematic view showing a twenty-fifth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 27 is a schematic view showing a twenty-sixth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 28 is a schematic diagram showing a twenty-seventh embodiment of the liquid crystal display device according to the present invention.
  • FIG. 29 is a schematic view showing a twenty-eighth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 30 is a schematic view showing a twenty-ninth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 31 is a schematic view showing a thirtieth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 32 is a schematic view showing a thirty-first embodiment of the liquid crystal display device according to the present invention.
  • FIG. 33 is a schematic view showing a thirty-second embodiment of the liquid crystal display device according to the present invention.
  • FIG. 34 is a schematic view showing a thirty-third embodiment of the liquid crystal display device according to the present invention.
  • FIG. 35 is a schematic view showing a thirty-fourth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 36 is a schematic view showing a thirty-fifth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 37 is a schematic view showing a thirty-sixth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 38 is a schematic view showing a thirty-seventh embodiment of a liquid crystal display device according to the present invention.
  • FIG. 39 is a schematic view showing a thirty-eighth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 40 is a schematic view showing a forty-ninth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 41 is a schematic view showing a fortieth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 42 is a schematic view showing a forty-first embodiment of the liquid crystal display device according to the present invention.
  • FIG. 43 is a schematic view showing a forty-second embodiment of the liquid crystal display device according to the present invention.
  • FIG. 44 is a schematic view showing a forty-third embodiment of the liquid crystal display device according to the present invention.
  • FIG. 45 is a schematic view showing a forty-fourth embodiment of the liquid crystal display device according to the present invention.
  • FIG. 46 is a schematic view showing a first embodiment of a stereoscopic display according to the present invention.
  • FIG. 47 is a schematic view showing a second embodiment of the 3D display device according to the present invention.
  • FIG. 48 is a schematic view showing a third embodiment of the 3D display device according to the present invention.
  • FIG. 49 is a schematic view showing a fourth embodiment of the 3D display device according to the present invention.
  • FIG. 50 is a schematic view showing a fifth embodiment of the 3D display device according to the present invention.
  • FIG. 51 is a schematic view showing a first embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 52 is a schematic view showing a second embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 53 is a schematic view showing a third embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 54 is a schematic view showing a fourth embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 55 is a schematic view showing a fifth embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 56 is a schematic view showing a sixth embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 57 is a schematic view showing a seventh embodiment of a stereoscopic image display apparatus according to the present invention.
  • FIG. 58 is a schematic view showing a first embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 59 is a schematic view showing a second embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 60 is a schematic view showing a third embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 61 is a schematic view showing a fourth embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 62 is a schematic view showing a fifth embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 63 is a schematic view showing a sixth embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 64 is a schematic view showing a seventh embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 65 is a schematic view showing an eighth embodiment of a display device having a polarization switching function according to the present invention.
  • FIG. 66 is a schematic view showing a first embodiment of a self-luminous liquid crystal display device according to the present invention.
  • FIG. 67 is a schematic view showing a second embodiment of the self-luminous liquid crystal display device according to the present invention.
  • FIG. 68 is a schematic view showing a third embodiment of the self-luminous liquid crystal display device according to the present invention.
  • FIG. 69 is a schematic view showing a fourth embodiment of the self-luminous liquid crystal display device according to the present invention.
  • FIG. 70 shows the light emission (image) displayed by the liquid crystal display device (left side) of Example 3 which is an embodiment of the present invention and the liquid crystal display device (right side) of a comparative example having a conventional liquid crystal display configuration. Show the difference between The photograph in FIG. 71 shows the transparency of the liquid crystal display device of Example 3 when the finger is placed on the back of the display.
  • a numerical range represented by using “to” means a range including numerical values described before and after “to” as the lower limit value and the upper limit value.
  • an optical system 1 of the present invention includes a polarizing element 10, and the polarizing element 10 has a function of exhibiting polarized light in the visible light region by absorption of light 20 containing at least ultraviolet light. Or as a polarization control element having a function of controlling at least light in the ultraviolet light range in the light 20 containing at least ultraviolet light.
  • the polarizing element 10 when the polarizing element 10 is provided as a polarized light emitting element, the polarized light emitting element absorbs light 20 containing at least ultraviolet light and polarizes light in the visible light range. Make it glow.
  • the polarizing element 10 when the polarizing element 10 is provided as a polarization control element, the light 20 containing at least ultraviolet light is polarized by the polarization function of the polarization control element.
  • the polarizing element 10 is used as a polarized light emitting element and the light 20 containing at least ultraviolet light is polarized ultraviolet light, the polarization axis of this polarized ultraviolet light and the light absorption axis of the polarized light emitting element, that is, the molecular orientation axis of the polarized light emitting dye By making them identical to each other, the ultraviolet light absorbed by the polarized light emitting element is large, and the light emission can be made stronger.
  • the light emission can be weakened by making these axes different from each other.
  • the coincidence between the polarization axis of the polarized ultraviolet light and the light absorption axis of the polarization light emitting element is sufficient if the intensity of polarized light emission is changed by changing the direction of these axes, and these axes completely coincide with each other.
  • the polarized light emitting element may have a function of absorbing ultraviolet light and exhibiting polarized light emission in the visible light range, and may have a function of polarizing and transmitting unabsorbed ultraviolet light.
  • the light 20 containing at least ultraviolet light is not particularly limited, and may be a light source emitting light containing at least ultraviolet light, and may be natural light.
  • the optical system 1 further includes a light source that emits light including at least ultraviolet light
  • the light 20 including at least ultraviolet light can be intentionally irradiated via the on / off function of the light source.
  • ultraviolet light means light in the ultraviolet light region to near ultraviolet visible light region.
  • the wavelength range of such ultraviolet light is preferably 300 to 430 nm, more preferably 340 to 415 nm, and particularly preferably 350 to 400 nm.
  • ultraviolet light refers to light in a wavelength range of 400 nm or less, but light in a wavelength range of 430 nm or less is also extremely low as human visual sensitivity.
  • the optical system according to the present invention includes, for example, personal computers, televisions, tablet terminals, car navigation systems, 3D televisions, various display devices such as various information display devices indoors and out, detectors such as light sensors, measuring devices, wearables It includes various devices and devices such as terminals, see-through displays, and various information terminals such as display devices for security.
  • the polarized light emitting element when the polarizing element 10 is provided as a polarized light emitting element, the polarized light emitting element has a visible light correction single transmittance of 60% or more in the wavelength range of 380 nm to 780 nm. preferable.
  • the optical system 1 provided with such a polarized light emitting element to, for example, a display device, the observer can not only see an image displayed on a transparent display, but also a landscape on the back side of the display. Compared to conventional liquid crystal displays etc., it can be seen through much more.
  • the visibility corrected transmittance is a transmittance calculated based on JIS Z 8722: 2009.
  • the visibility correction transmittance of 60% or more is higher than that of a normal liquid crystal display, and the optical system 1 equipped with a polarized light emitting element having such a high visibility correction transmittance is suitable for application to a transparent display ing.
  • the higher the visibility correction transmittance the application to a transparent display requiring higher transmittance becomes possible. Therefore, the visibility correction transmittance is preferably 70% or more, more preferably 80% or more, more preferably 85% or more, and particularly preferably 90% or more.
  • Display device One embodiment of the invention is a display comprising an optical system 1.
  • the type of display device is not particularly limited, and examples thereof include a (self-luminous) liquid crystal display device, a stereoscopic display device capable of stereoscopic display, and a stereoscopic image display device.
  • the display device including the optical system 1 can be manufactured by applying the display configuration of the conventional display device, and thus can be manufactured easily and inexpensively.
  • One embodiment of the display device of the present invention is a liquid crystal display device in which the display device further comprises a liquid crystal cell, and a polarizing element is provided as a polarized light emitting element.
  • polarized ultraviolet light is irradiated from one side of the liquid crystal cell, and a polarized light emitting element is disposed on the other side of the liquid crystal cell.
  • the liquid crystal display device may further include a light source emitting polarized ultraviolet light. In this case, the light source is disposed on one side of the liquid crystal cell (on the side where the polarized light emitting element is not disposed).
  • FIG. 2 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 2 (hereinafter, a display device having a “liquid crystal cell” is also referred to as “liquid crystal display device”) is a polarized light emitting element 10a that emits polarized light by absorbing light containing at least ultraviolet light. And a liquid crystal cell 30 stacked on top of the liquid crystal cell 10a, and polarized ultraviolet light 20a is emitted from the liquid crystal cell 30 side.
  • a light source emitting polarized ultraviolet light 20 a may be further disposed on the liquid crystal cell 30 in order to irradiate the polarized ultraviolet light 20 a.
  • the amount of light absorbed by the polarized ultraviolet light 20a can be controlled with respect to the absorption axis of the polarized light emitting element 10a.
  • the polarized light emitting element absorbs ultraviolet light
  • the polarized light emitting element exhibits polarized light emission in the visible light range.
  • an image can be displayed by the polarized light emitting element absorbing ultraviolet light and exhibiting polarized light emission in the visible light range.
  • the absorption of ultraviolet light is large in the polarized light emitting element, the light emission is strong, and when the absorption of ultraviolet light is small, the light emission is weak.
  • the polarized light emission from the polarized light emitting element 10a is also transmitted through the side on which the liquid crystal cell 30 is not disposed, it is displayed from either side of the liquid crystal cell 30 and the polarized light emitting element 10a. You can observe the image.
  • the display shown in FIG. 2 may further include a light absorbing layer or a light reflecting layer as a light control layer.
  • the display device of such an embodiment may further include a visible light absorbing element 40a as a light absorbing layer 40 below the polarized light emitting element 10a, as shown in FIG. 3, or as shown in FIG.
  • the light reflection layer 50 may be further provided below the polarized light emitting element 10a.
  • a visible light absorbing element 40 a such as a black film is provided as the light absorbing layer 40.
  • the light reflection layer 50 reflects polarized light emitted by the polarized light emitting element 10 a from the side where the liquid crystal cell 30 is not disposed, and emits polarized light toward the side where the liquid crystal cell 30 is disposed. Improve your By reflecting the polarized light, the light intensity of the polarized light to the side where the liquid crystal cell 30 is disposed is further increased, so that a bright image can be displayed.
  • a double image may be displayed on the liquid crystal cell 30 by reflected polarized light.
  • a quarter wave plate 61 which is a retardation plate is further provided as a light control layer between the polarized light emitting element 10a and the light reflection layer 50. It may be provided.
  • the 1 ⁇ 4 wavelength plate 61 is generally a retardation plate having a function of converting circularly polarized light into linearly polarized light and a function of converting linearly polarized light into circularly polarized light.
  • the linearly polarized light of the polarized light emitting element 10 a emitted from the side where the liquid crystal cell 30 is not disposed by the 1 ⁇ 4 wavelength plate 61 is converted to circularly polarized light either counterclockwise or clockwise.
  • the circularly polarized light is reflected by the light reflecting layer 50, and at that time, it is converted into circularly polarized light in a direction opposite to the circularly polarized light incident on the light reflecting layer 50 and is reflected.
  • the circularly polarized light in the reverse direction is converted by the 1 ⁇ 4 wavelength plate 61 into linearly polarized light deviated by 90 ° from the linearly polarized light of the polarized light emitting element 10 a emitted from the side where the liquid crystal cell 30 is not disposed.
  • the polarization axis of this linearly polarized light is coaxial with the absorption axis of the polarized light emitting element 10a, and as a result, the reflection of the linearly polarized light emitted from the polarized light emitting element 10a transmitted through the 1 ⁇ 4 wavelength plate 61 is suppressed.
  • light 20 containing at least ultraviolet light in particular ultraviolet light 20b
  • a polarizing plate O-UVP 70a which polarizes ultraviolet light as a polarizing plate is disposed on one surface side of the liquid crystal cell 30 to which the ultraviolet light 20b is irradiated.
  • the display device may further comprise a light source emitting light 20 containing at least ultraviolet light, in particular ultraviolet light 20b.
  • the light source is disposed on one side of the liquid crystal cell (on the side where the polarized light emitting element is not disposed).
  • the polarizing plate O-UVP 70a has a function of polarizing and transmitting ultraviolet light vibrating only in a specific direction and transmitting visible light in the state of incident light with respect to ultraviolet light. That is, the polarizing plate O-UVP 70a has a function of polarizing ultraviolet light while light in the visible region exhibits high transmittance.
  • the polarized light emitting element 10a that absorbs the ultraviolet light polarized and transmitted by the polarizing plate O-UVP 70a exhibits polarized light emission, and an image is displayed using the polarized light emission.
  • the displayed image can be observed through the polarizing plate O-UVP 70a.
  • display device shown in FIG. 6 since the polarized light emission from the polarized light emitting element 10a is also transmitted through the side where the liquid crystal cell 30 is not disposed, display is performed from either side of the polarizing plate O-UVP 70a and the polarized light emitting element 10a. Can observe the image.
  • the display device shown in FIG. 7 further includes a visible light absorbing element 40a such as a black film below the polarized light emitting element 10a.
  • the display device shown in FIG. 7 having this configuration can display an image with improved contrast, similar to the display device shown in FIG.
  • a display device further including a light reflection layer 50 below the polarized light emitting element 10a in addition to the configuration shown in FIG. 6, there is shown a display device further including a light reflection layer 50 below the polarized light emitting element 10a.
  • the display device shown in FIG. 8 having this configuration can display a bright image, similarly to the display device shown in FIG.
  • the liquid crystal display device shown in FIG. 9 constitutes the display device shown in FIG. 8 and further includes a quarter wave plate as a light control layer between the polarized light emitting element 10a and the light reflection layer 50, which is a retardation plate. It has 61.
  • the display device shown in FIG. 9 can display a bright image while suppressing the occurrence of double images on the display.
  • FIG. 10 Another embodiment of the display device according to the present invention is, for example, as shown in FIG. 10, a polarized light emitting element 10a, a liquid crystal cell 30 stacked on the polarized light emitting element 10a, and a liquid crystal cell 30 irradiated with ultraviolet light 20b.
  • a polarizing plate V + UVP 70b having a function of polarizing both ultraviolet light and visible light is provided as a polarizing plate on one side of the light 20, and light 20 containing at least ultraviolet light, particularly ultraviolet light 20b is from the polarizing plate V + UVP 70b side It is irradiated.
  • the display device may further comprise a light source emitting light 20 containing at least ultraviolet light, in particular ultraviolet light 20b.
  • the light source is disposed on one side of the liquid crystal cell (on the side where the polarized light emitting element is not disposed).
  • the ultraviolet light 20b is polarized by the polarizing plate V + UVP 70b, and the polarized ultraviolet light causes the polarized light emitting element 10a to emit polarized light, and an image is displayed using the polarized light. Since the polarizing plate V + UVP 70b polarizes and transmits ultraviolet light and visible light, it exhibits polarized light emission in the visible light range when it absorbs ultraviolet light polarized by the polarized light emitting element 10a. Thereby, the displayed image can be observed from any side of the polarizing plate V + UVP 70 b and the polarized light emitting element 10 a.
  • the display shown in FIG. 11 further includes a visible light absorbing element 40a such as a black film below the polarized light emitting element 10a.
  • the display device shown in FIG. 11 having this configuration can display an image with improved contrast, as in the display devices shown in FIGS.
  • a light reflecting layer 50 is further provided below the polarized light emitting element 10a.
  • the display device shown in FIG. 12 having this configuration can display a bright image as the display device shown in FIGS.
  • the display device shown in FIG. 13 further includes a 1/1 phase difference plate as a light control layer between the polarized light emitting element 10a and the light reflection layer 50.
  • a four-wave plate 61 is provided.
  • the display device shown in FIG. 13 can display a bright image while suppressing the occurrence of double images on the display.
  • Another embodiment of the display device of the present invention includes a liquid crystal cell, a polarizing plate O-UVP for polarizing ultraviolet light, a polarizing plate V + UVP for polarizing both ultraviolet light and visible light, and UV transmission for transmitting ultraviolet light.
  • a display device further comprising at least one polarizing plate selected from the group consisting of a polarizing plate and a UV non-transmissive polarizing plate that does not transmit ultraviolet light, and the polarizing element is provided as a polarized light emitting element.
  • One of the preferable modes of such a display device is that one of the polarizing plates has an absorption axis in the direction orthogonal to the polarization axis of the polarized light emitting element.
  • Such a display device includes, for example, as a polarizing plate, a UV transmitting polarizing plate which is a polarizing plate that transmits light in the ultraviolet light range, as shown in FIGS. 14 to 17.
  • the display device of such an embodiment includes a liquid crystal cell and a polarized light emitting element as a polarizing element, and light including at least ultraviolet light is irradiated from one side of the liquid crystal cell, and the polarized light emitting element is a liquid crystal cell.
  • a UV transmitting polarizing plate which is disposed on the other surface side and transmits ultraviolet light, is disposed as a polarizing plate between the polarized light emitting element and the liquid crystal cell.
  • light containing at least ultraviolet light is polarized ultraviolet light or light containing visible light and ultraviolet light
  • the UV transmission polarizing plate has an absorption axis in the direction orthogonal to the polarization axis of the polarized light emitting element.
  • the UV transmission polarizing plate has little absorption of ultraviolet light and transmits ultraviolet light, while transmitting polarized visible light incident on an axis orthogonal to the absorption axis of the UV transmission polarizing plate, but the absorption axis of the UV transmission polarizing plate And has a function of transmitting or hardly transmitting visible light incident coaxially.
  • the wavelength of ultraviolet light transmitted by the UV transmission polarizing plate is 430 nm or less, preferably 300 to 420 nm, and more preferably 350 to 400 nm.
  • the transmittance of ultraviolet light is preferably 20 to 100%, more preferably 30 to 100%, still more preferably 40 to 100%, and particularly preferably 50 to 100%.
  • the upper limit of the wavelength of ultraviolet light is basically 400 nm or less, but since light with a wavelength of 430 nm or less is also extremely low in visibility, it is set to 430 nm or less as light having performance equivalent to ultraviolet light. doing.
  • FIG. 14 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 14 includes a polarized light emitting element 10a, a liquid crystal cell 30 stacked on the polarized light emitting element 10a, and a UV transmission polarizing plate 70c between the liquid polarized light emitting element 10a and the liquid crystal cell 30.
  • the polarized light emitting element 10a is disposed so that the polarization axis of the polarized light emitting element 10a and the absorption axis of the UV transmission polarizing plate 70c are orthogonal to each other, and the polarized ultraviolet light 20a is irradiated from the liquid crystal cell 30 side.
  • the display device may further include a light source that emits the polarized ultraviolet light 20a.
  • the light source is disposed on one side of the liquid crystal cell 30 (on the side where the polarized light emitting element 10 a is not disposed).
  • the polarized ultraviolet light 20a passes through the UV transmission polarizing plate 70c through the liquid crystal cell 30, and the polarized light emitting element 10a exhibits polarized light emission by the transmitted ultraviolet light.
  • polarization is achieved by arranging the polarization axis of the polarization light emitting element 10a and the absorption axis of the UV transmission polarization plate 70c orthogonally.
  • the polarized light emitted from the light emitting element 10a is transmitted through the UV transmission polarizing plate 70c, and an image is displayed using the transmitted polarized light.
  • FIG. 1 the display device shown in FIG. 1
  • the polarized light emission from the polarized light emitting element 10a is also transmitted from the side where the liquid crystal cell 30 is not disposed, so it is displayed from either side of the liquid crystal cell 30 and the polarized light emitting element 10a. You can observe the image.
  • the display device shown in FIG. 15 has a configuration of the display device shown in FIG. 14, in which light 20c including visible light and ultraviolet light is emitted instead of the polarized ultraviolet light 20a. That is, ultraviolet light of natural light can be used.
  • the display device may further include a light source emitting light 20c including visible light and ultraviolet light.
  • the light source is disposed on one side of the liquid crystal cell 30 (on the side where the polarized light emitting element 10 a is not disposed).
  • a polarizing plate V + UVP 70 b is further provided on the liquid crystal cell 30 in order to make polarized light enter the liquid crystal cell 30.
  • the light 20c including visible light and ultraviolet light is polarized by the polarizing plate V + UVP 70b, and of the polarized light including visible light and ultraviolet light, the ultraviolet light passes through the UV transmission polarizing plate 70c, and the transmitted ultraviolet light
  • the polarized light emitting element 10a exhibits polarized light emission. Since the polarization axis of the polarized light emitting element 10a and the absorption axis of the UV transmission polarizing plate 70c are disposed orthogonal to each other, this polarized light is transmitted through the UV transmission polarizing plate 70c, and the image is displayed using the transmitted polarized light. Be done.
  • the displayed image can be observed through the polarizing plate V + UVP 70b. Also in the display device shown in FIG. 15, the displayed image can be observed from either side of the polarizing plate V + UVP 70b and the polarized light emitting element 10a as in FIG. With the configuration of the display device shown in FIG. 15, it is possible to display images different from each other in the case where light in the ultraviolet region is used and in the visible region. That is, switching of the self-luminous liquid crystal display or the light transmissive display can be performed by selecting a light source for emitting visible light or a light source for emitting ultraviolet light.
  • the display device shown in FIG. 16 having this configuration can display an image with improved contrast, as in FIGS.
  • the display device shown in FIG. 17 having this configuration can display a bright image, as in FIGS.
  • the polarizing element used as a polarized light emitting element in the present invention can also be used in a display device using light containing at least ultraviolet light as a backlight, as shown in, for example, FIGS.
  • the display device of such an embodiment further includes a liquid crystal cell, a polarizing plate V + UVP that polarizes both ultraviolet light and visible light, and a polarized light emitting element as a polarizing element.
  • polarized ultraviolet light or light (natural light) containing visible light and ultraviolet light is irradiated from one surface side of the liquid crystal cell, the polarizing plate V + UVP is disposed on the other surface side of the liquid crystal cell, and light is irradiated.
  • a polarized light emitting element is disposed on one side of the liquid crystal cell.
  • polarized light that absorbs polarized ultraviolet light or light in the ultraviolet light range of visible light and light including ultraviolet light and is emitted by the polarized light emitting element and the polarizing plate V + UVP Polarized light thus obtained is obtained using light of different wavelength regions.
  • FIG. 18 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 18 includes a polarized light emitting element 10a, a liquid crystal cell 30 stacked on the polarized light emitting element 10a, and a polarizing plate V + UVP 70b stacked on the liquid crystal cell 30, and from the polarized light emitting element 10a side
  • the polarized ultraviolet light 20a is irradiated.
  • the display device may further include a light source that emits the polarized ultraviolet light 20a.
  • the light source is disposed on one side of the liquid crystal cell (the side on which the polarized light emitting element 10a is disposed).
  • Irradiation of the polarized ultraviolet light 20a causes the polarized light emitting element 10a to emit polarized light, and an image is displayed using the polarized light. Since the polarizing plate V + UVP 70b polarizes and transmits visible light, the displayed image can be observed through the polarizing plate V + UVP 70b.
  • the polarizing plate V + UVP 70b may be disposed coaxially or at right angles with the polarization axis of the polarized light emitting element 10a and the absorption axis of the polarizing plate V + UVP 70b, but the polarizing plate V + UVP 70b is polarized from the polarized light emitting element 10a It is preferable that the absorption axis of the polarizing plate V + UVP 70b and the polarization axis of the polarized light emitting element 10a be orthogonal to each other in terms of easily transmitting light.
  • the display device shown in FIGS. 19 to 21 is irradiated with light 20c including visible light and ultraviolet light, instead of the polarized ultraviolet light 20a in the configuration of the display device shown in FIG. That is, the ultraviolet light contained in natural light can be used.
  • the display device may further include a light source that emits light 20c including visible light and ultraviolet light.
  • the light source is disposed on one side of the liquid crystal cell 30 (the side on which the polarized light emitting element 10 a is disposed).
  • a UV transmitting polarizing plate 70c, a UV non-transmitting polarizing plate 70d or a further polarizing plate V + UVP 70b ' is further provided as another polarizing plate between the polarized light emitting element 10a and the liquid crystal cell
  • the polarization axis of the polarized light emitting element and the absorption axis of these other polarizing plates are disposed orthogonal to each other.
  • an UV transmission polarizing plate 70c is provided between the liquid crystal cell 30 and the polarized light emitting element 10a, and an axis in which the polarization axis of the polarized light emitting element 10a and the absorption axis of the UV transmitting polarizing plate 70c are different. For example, they are arranged orthogonally.
  • the polarized light emitting element 10 a When the polarized light emitting element 10 a is irradiated with light 20 c containing visible light and ultraviolet light, the polarized light emitting element 10 a exhibits polarized light emission by ultraviolet light from the light 20 c containing visible light and ultraviolet light.
  • the polarization light emission element 10a is orthogonal to the absorption axis of the UV transmission polarization plate 70c.
  • the polarized light emitted from the light source can be transmitted through the UV transmitting polarizer 70c, and an image is displayed using the transmitted polarized light.
  • the polarized light in the visible light range emitted from the polarized light emitting element 10a can be polarized by the UV transmission polarizing plate 70c to have a higher degree of polarization. Since visible light having such a high degree of polarization can be controlled by the polarizing plate V + UVP 70b, the displayed image can be observed through the polarizing plate V + UVP 70b.
  • a UV non-transmissive polarizing plate 70d is provided between the liquid crystal cell 30 and the polarized light emitting element 10a, and the polarization axis of the polarized light emitting element 10a and the absorption axis of the UV non-transmissive polarizing plate 70d are the same. Arranged orthogonally.
  • the UV non-transmissive polarizing plate 70d used in this embodiment may be a general polarizing plate used in a normal liquid crystal display device or the like, and has a function of cutting ultraviolet light.
  • the UV non-transmissive polarizing plate 70 d does not transmit ultraviolet light, but polarizes and transmits visible light coaxially incident on the polarization axis of the UV non-transmissive polarizing plate 70 d. However, with the absorption axis of the UV non-transmissive polarizing plate 70 d It has a function of transmitting or hardly transmitting visible light incident coaxially.
  • the polarized light emitting element 10 a When the polarized light emitting element 10 a is irradiated with light 20 c containing visible light and ultraviolet light, the polarized light emitting element 10 a exhibits polarized light emission by ultraviolet light from the light 20 c containing visible light and ultraviolet light.
  • the polarized light axis of the polarized light-emitting element 10a and the absorption axis of the UV non-transmissive polarizing plate 70d are orthogonal to each other.
  • Polarized light can be transmitted through the UV non-transmissive polarizing plate 70d, and an image is displayed using the transmitted polarized light. Since the polarizing plate V + UVP 70 b can control polarization in the visible light range, the display image formed by the liquid crystal cell 30 can be observed through the polarizing plate V + UVP 70 b.
  • a further polarizing plate V + UVP 70b ' is provided between the liquid crystal cell 30 and the polarized light emitting element 10a, and the polarization axis of the polarized light emitting element 10a and the absorption axis of the polarizing plate V + UVP 70b' are orthogonal to each other. Be placed.
  • the polarizing plate V + UVP 70b ′ may be the same as or different from the polarizing plate V + UVP 70b stacked on the liquid crystal cell 30, and is not particularly limited as long as it has the same function as the polarizing plate V + UVP 70b.
  • the polarized light emitting element 10 a When the polarized light emitting element 10 a is irradiated with light 20 c containing visible light and ultraviolet light, the polarized light emitting element 10 a exhibits polarized light emission by ultraviolet light from the light 20 c containing visible light and ultraviolet light.
  • the polarization from the polarization light emitting element 10a is orthogonal due to the orthogonal arrangement of the polarization axis of the polarized light emitting element 10a and the absorption axis of the polarizing plate V + UVP 70b ′
  • the light emission can be transmitted through the polarizing plate V + UVP 70b ', and an image is displayed using the transmitted polarized light. Since the polarizing plate V + UVP 70b disposed on the liquid crystal cell 30 can control polarization in the visible light range, the displayed image can be observed through the polarizing plate V + UVP 70b.
  • the display device having this configuration by further including an apparatus capable of detecting ultraviolet light, not only visible light or visible light can be recognized or detected, but also light in the ultraviolet visible area can be recognized or detected. It is possible to use as a display device which can use each of the light of and the light of the ultraviolet region.
  • the polarizing element used as a polarized light emitting element in the present invention can not only use light containing at least ultraviolet light as a backlight but also emit ultraviolet light on the viewing side. It can also be used for displays capable of suppressing light.
  • the display device of such an embodiment includes a liquid crystal cell and a polarized light emitting element as a polarizing element, and light including at least ultraviolet light is irradiated from one surface side of the liquid crystal cell.
  • a polarizing light emitting element is disposed on the other surface side of the liquid crystal cell, and on one surface side of the liquid crystal cell irradiated with light, a polarizing plate V + UVP as a polarizing plate that polarizes both ultraviolet light and visible light, Alternatively, a polarizing plate O-UVP is disposed which polarizes and transmits ultraviolet light and transmits visible light as it is.
  • an ultraviolet light absorbing element a UV non-transmissive polarizing element plate having an absorption axis coaxial or orthogonal to the polarizing axis of the polarized light emitting element, or a polarized light emitting element on the side where the liquid crystal cell of the polarized light emitting element is not disposed.
  • An additional polarizing plate O-UVP having an absorption axis in the direction orthogonal to the polarization axis of
  • the light containing at least ultraviolet light may be light (natural light) containing visible light and ultraviolet light.
  • FIG. 22 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 22 includes a polarizing plate V + UVP 70b, a liquid crystal cell 30 stacked on the polarizing plate V + UVP 70b, a polarized light emitting element 10a stacked on the liquid crystal cell 30, and an ultraviolet stacked on the polarized light emitting element 10a.
  • a light absorbing element 40 b is provided, and light 20 c including visible light and ultraviolet light is emitted from the side of the polarizing plate V + UVP 70 b.
  • the display device may further include a light source emitting light 20c including visible light and ultraviolet light.
  • the light source is disposed on one side of the liquid crystal cell 30 (on the side where the polarized light emitting element 10 a is not disposed).
  • the polarized light emitting element 10a exhibits polarized light emission by the ultraviolet light from the light containing the polarized visible light and ultraviolet light, The image is displayed using.
  • the polarized light emitting element 10a also has a function to polarize and transmit unabsorbed ultraviolet light, so that, among the ultraviolet light from the light source 20c, the ultraviolet light not absorbed by the polarized light emitting element 10a is polarized It can be polarized and transmitted through the light emitting element 10a.
  • the ultraviolet light absorbing element 40b such as an ultraviolet light absorbing film
  • the ultraviolet light absorbing element 40b it is possible not only to absorb the ultraviolet light transmitted through the polarized light emitting element 10a but also to prevent the absorption of ultraviolet light which may be incident from the outside of the display device.
  • the polarized light emission from the polarized light emitting element 10 a also transmits the polarizing plate V + UVP 70 b through the liquid crystal cell 30. Therefore, the observer can not only observe the image displayed from either side of the polarizing plate V + UVP 70b or the ultraviolet light absorbing element 40b, but also can prevent the adverse effect of the ultraviolet light on the eye.
  • the display device shown in FIG. 23 has a UV non-transmissive polarizing plate 70d ′ having an absorption axis in the same direction as the polarization axis of the polarized light emitting element 10a instead of the ultraviolet light absorbing element 40b in the configuration of the display shown in FIG. Is equipped. Similar to FIG. 22, the polarized light emitting element 10a exhibits polarized light emission by ultraviolet light from the light 20c including visible light and ultraviolet light polarized through the polarizing plate V + UVP 70b, and an image is displayed using the polarized light emission. .
  • the UV non-transmissive polarizing plate 70d 'used in this embodiment is arranged such that the polarization axis of the polarized light emitting element 10a and the absorption axis of the UV non-transmissive polarizing plate 70d' are coaxial.
  • the absorption axis of ' it is designed such that absorption of polarized light emitted from the polarized light emitting element 10a is small, or that only the wavelength of light emitted by the polarized light emitting element 10a can be transmitted.
  • the polarized light emission from the polarized light emitting element 10a can be transmitted through the UV non-transmissive polarizing plate 70d ', and the displayed image can be observed through the UV non-transmissive polarizing plate 70d'.
  • the UV non-transmissive polarizing plate 70d ' since the UV non-transmissive polarizing plate 70d 'has a function of cutting ultraviolet light, the ultraviolet light from the light source 20c is not absorbed by the polarized light emitting element 10a but is polarized through the polarized light emitting element 10a. The transmitted ultraviolet light is cut by the UV non-transmissive polarizing plate 70d '. Thereby, the ultraviolet light emitted on the viewing side can be suppressed.
  • the polarized light emission from the polarized light emitting element 10a it is possible to adjust the emission color, the wavelength dependency of the emitted light amount, and the like by the compound used as a dichroic dye as described later. Therefore, even if the absorption axis of the UV non-transmissive polarizing plate 70d 'and the polarization axis of the polarized light emitting element 10a are coaxial, polarization is adjusted by adjusting the wavelength and transmittance of light absorbed by the UV non-transmissive polarizing plate 70d'. The color of light emitted from the light emitting element 10a changes via the UV non-transmissive polarizing plate 70d '. Thus, it is possible to observe a color different from the original emission color emitted by the polarized light emitting element 10a.
  • the UV non-transmissive polarizing plate 70d having an absorption axis in the direction orthogonal to the polarization axis of the polarized light emitting element 10a is used instead of the ultraviolet light absorbing element 40b in the configuration of the display shown in FIG. It is equipped. Similar to FIG. 22, the polarized light emitting element 10a exhibits polarized light emission by ultraviolet light from the light 20c including visible light and ultraviolet light polarized through the polarizing plate V + UVP 70b, and an image is displayed using the polarized light emission. .
  • the polarization axis of the polarized light emitting element 10a and the absorption axis of the UV non-transmissive polarizing plate 70d are orthogonal to each other, polarized light emitted from the polarized light emitting element 10a is transmitted through the UV non-transmissive polarizing plate 70d. Therefore, the displayed image can be observed through the UV non-transmissive polarizing plate 70d.
  • the UV non-transmissive polarizing plate 70d has a function of cutting ultraviolet light, the ultraviolet light from the light 20c including visible light and ultraviolet light is not absorbed by the polarized light emitting element 10a, and polarized light is emitted. The ultraviolet light polarized and transmitted by the element 10a is cut by the UV non-transmissive polarizing plate 70d. Thereby, the ultraviolet light emitted on the viewing side can also be suppressed.
  • the polarizing plate O-UVP is disposed instead of the polarizing plate V + UVP in the configuration of the display shown in FIG.
  • an ultraviolet light absorbing film or a further polarization element O-UVP having an absorption axis in the same direction as the polarization axis of the polarization light emitting element is provided on the surface side of the polarization light emitting element where the liquid crystal cell is not disposed.
  • ultraviolet light 20b is emitted instead of light 20c containing visible light and ultraviolet light.
  • the display device may further include a light source that emits the ultraviolet light 20b. In this case, the light source is disposed on one side of the liquid crystal cell 30 (on the side where the polarized light emitting element 10 a is not disposed).
  • the display device shown in FIG. 25 includes a polarizing plate O-UVP 70a, a liquid crystal cell 30 stacked on the polarizing plate O-UVP 70a, a polarized light emitting element 10a stacked on the liquid crystal cell 30, and a polarized light emitting element 10a.
  • an ultraviolet light absorbing element 40b stacked on the The ultraviolet light 20b is polarized by the polarizing plate O-UVP 70a, and the polarized ultraviolet light is absorbed with respect to the absorption axis of the polarized light emitting element 10a.
  • the polarized light emitting element 10a exhibits polarized light emission, and an image is displayed using the polarized light emission.
  • the polarized light emitting element 10a also has a function of polarizing and transmitting unabsorbed ultraviolet light. Therefore, among the irradiated ultraviolet light 20b, the ultraviolet light which is not absorbed by the polarized light emitting element 10a is polarized and transmitted through the polarized light emitting element 10a.
  • the ultraviolet light transmitted through the polarized light emitting element 10a is absorbed by the ultraviolet light absorbing element 40b such as an ultraviolet light absorbing film, whereby the ultraviolet light from the backlight emitted on the viewing side can be suppressed.
  • the ultraviolet light absorbing element 40b it is possible not only to absorb the ultraviolet light transmitted through the polarized light emitting element 10a but also to prevent the absorption of ultraviolet light which may be incident from the outside of the display device.
  • the polarized light emission in the visible light range from the polarized light emitting element 10a is also transmitted through the liquid crystal cell 30 and the polarizing plate O-UVP 70a. Therefore, the observer can not only observe an image displayed from either side of the polarizing plate O-UVP 70a or the ultraviolet light absorbing element 40b, but also can prevent adverse effects of ultraviolet light on the eye.
  • a liquid crystal display having high transparency in the visible light range is obtained. You can get it.
  • the display device shown in FIG. 26 includes a polarizing plate O-UVP 70a, a liquid crystal cell 30 stacked on the polarizing plate O-UVP 70a, a polarized light emitting element 10a stacked on the liquid crystal cell 30, and a polarized light emitting element 10a.
  • the polarization axis of the polarized light emitting element 10a is disposed coaxially with the absorption axis of the polarization plate O-UVP 70a '.
  • the polarizing plate O-UVP 70a ' may be the same as or different from the polarizing plate O-UVP 70a, and is not particularly limited as long as it has the same function as the polarizing plate O + UVP 70a.
  • the ultraviolet light 20b is polarized by the polarizing plate O-UVP 70a, and the polarized ultraviolet light is absorbed with respect to the absorption axis of the polarized light emitting element 10a.
  • the polarized light emitting element 10a exhibits polarized light emission, and an image is displayed using the polarized light emission. Since visible light passes through the polarizing plate O-UVP 70a ', the displayed image can be observed through the polarizing plate O-UVP 70a'.
  • the polarized light emitting element 10a also has a function of polarizing and transmitting unabsorbed ultraviolet light.
  • the ultraviolet light which is not absorbed by the polarized light emitting element 10a is polarized and transmitted by the polarized light emitting element 10a.
  • the polarization axis of the polarized light emitting element 10a is arranged coaxially with the absorption axis of the polarizing plate O-UVP 70a ', the ultraviolet light from the light source 20b which transmits the polarized light emitting element 10a is the polarizing plate O-UVP 70a' Absorbed by the absorption axis of Thereby, the ultraviolet light emitted on the viewing side can be suppressed.
  • the structure of the liquid crystal cell 30 is a liquid crystal cell 30b for ultraviolet light which enables display of an image etc. on the display by ultraviolet light; It has a structure (double cell structure) using two liquid crystal cells with a visible light liquid crystal cell 30a that enables display of an image or the like on a display.
  • 27 to 31 are schematic diagrams showing the configuration of such a display device.
  • 27 and FIG. 28 have a configuration in which the liquid crystal cell has a double cell structure of a liquid crystal cell for ultraviolet light and a liquid crystal cell for visible light in the configurations of the display shown in FIGS. There is.
  • the ultraviolet light from the light 20c including the visible light and the ultraviolet light polarized and transmitted through the polarizing plate V + UVP 70b is controlled in polarization by the liquid crystal cell 30b for ultraviolet light to display an image.
  • the visible light from the light 20c including visible light and ultraviolet light polarized and transmitted through the polarizing plate V + UVP 70b, and polarized light emission in the visible light range from the polarized light emitting element 10a Images are displayed by being controlled.
  • the display device shown in FIGS. 29 to 31 has a configuration in which the liquid crystal cell has a double cell structure and can be visually recognized or detected from both sides of the display device.
  • the light 20c containing visible light and ultraviolet light is irradiated from a light source that emits visible light and a light source for ultraviolet light that emits ultraviolet light singly or independently.
  • the ultraviolet light is emitted from the light source, the ultraviolet light polarized and transmitted through the polarizing plate O-UVP 70a is controlled in polarization by the ultraviolet light liquid crystal cell 30b, and the image is displayed.
  • the ultraviolet light transmitted through the liquid crystal cell 30b for ultraviolet light is irradiated to the polarized light emitting element 10a, and the polarized light emitting element 10a emits polarized light.
  • the visible light liquid crystal cell 30a controls the polarization of visible light transmitted through the polarizing plate O-UVP 70a and polarized light emission in the visible light region from the polarized light emitting element 10a.
  • the image is displayed.
  • the polarized light controlled by the visible light liquid crystal cell 30a can be observed through the UV non-transmissive polarizing plate 70d. In the display device shown in FIG.
  • polarized light in the visible light range from the polarized light emitting element 10a is also transmitted through the polarizing plate O-UVP 70a through the liquid crystal cell 30b for ultraviolet light. Therefore, an image controlled by the visible light liquid crystal cell 30a can be observed from either side of the UV non-transmissive polarizing plate 70d and the polarizing plate O-UVP 70a. Further, in the display device shown in FIG. 29, the visible light liquid crystal cell 30a and the ultraviolet light liquid crystal cell 30b are disposed via the polarized light emitting element 10a. The polarizing plate O-UVP 70a polarizes ultraviolet light, and the polarization is controlled by the liquid crystal cell 30b for ultraviolet light.
  • the polarized light emitting element 10a When the polarized light emitting element 10a absorbs the controlled ultraviolet light, the polarized light emitting element 10a exhibits polarized light emission in the visible light range, while the controlled ultraviolet light is not absorbed by the polarized light emitting element 10a, and thus the polarized light emission When transmitting through the element 10a, the polarized light emitting element 10a does not emit light.
  • the polarized light emission in the visible light range is controlled by the visible light liquid crystal cell 30a, and the controlled light emission can be transmitted by the UV non-transmissive polarizing plate 70d to display an image. This makes it possible to provide different images on the UV non-transmissive polarizing plate 70d side and the polarizing plate O-UVP 70a side.
  • the light 20c including visible light and ultraviolet light is irradiated from a light source that emits visible light and a light source that emits ultraviolet light and that includes a single light source or an independent light source.
  • the ultraviolet light is emitted from the light source, the ultraviolet light polarized and transmitted through the polarizing plate O-UVP 70a is controlled in polarization by the ultraviolet light liquid crystal cell 30b, and the image is displayed.
  • the ultraviolet light transmitted through the liquid crystal cell 30b for ultraviolet light is irradiated to the polarized light emitting element 10a, and the polarized light emitting element 10a emits polarized light.
  • visible light transmitted through the polarizing plate O-UVP 70a by emitting visible light from the light source and polarized light emission in the visible light region from the polarized light emitting element 10a are for visible light through the UV transmitting polarizing plate 70c.
  • Polarization is controlled by the liquid crystal cell 30a to display an image.
  • the image displayed by the liquid crystal cell 30a for visible light can be observed through the UV non-transmissive polarizing plate 70d.
  • polarized light in the visible light range from the polarized light emitting element 10a is also transmitted through the polarizing plate O-UVP 70a via the liquid crystal cell 30b for ultraviolet light.
  • the image displayed by the visible light liquid crystal cell 30a can be observed from either side of the UV non-transmissive polarizing plate 70d and the polarizing plate O-UVP 70a.
  • the visible light liquid crystal cell 30a and the ultraviolet light liquid crystal cell 30b are disposed via the polarized light emitting element 10a. Since the polarized light emitting element 10a also has a function to polarize and transmit unabsorbed ultraviolet light, the ultraviolet light not absorbed by the polarized light emitting element 10a of the ultraviolet light from the light source 20c is polarized It is polarized and transmitted by the light emitting element 10a.
  • the ultraviolet light transmitted through the polarized light emitting element 10a is further transmitted through the UV transmitting polarizing plate 70c, and is irradiated to the UV non-transmitting polarizing plate 70d through the visible light liquid crystal cell 30a.
  • the polarization axis of the polarized light emitting element 10a is disposed orthogonal to the absorption axis of the UV non-transmissive polarizing plate 70d. Therefore, the ultraviolet light from the light source 20c which transmits the polarized light emitting element 10a is absorbed by the absorption axis of the UV non-transmissive polarizing plate 70d.
  • the light source emits ultraviolet light, whereby the polarization of ultraviolet light from the light source is controlled in the liquid crystal cell 30b for ultraviolet light, and in the liquid crystal cell 30a for visible light, polarization
  • the polarization based on visible light from can be controlled to display different images. This makes it possible to provide different images on the UV non-transmissive polarizing plate 70d side and the polarizing plate O-UVP 70a side.
  • the light 20c including visible light and ultraviolet light is irradiated from a light source that emits visible light and a light source that emits ultraviolet light and that includes a single light source or a light source that is independent of each other.
  • the ultraviolet light passes through the liquid crystal cell 30a for visible light and the two UV transmission polarizing plates 70c, and is irradiated to the polarizing plate O-UVP 70a.
  • the ultraviolet light polarized and transmitted through the polarizing plate O-UVP 70a is polarization-controlled by the liquid crystal cell 30b for ultraviolet light and used for image display.
  • the ultraviolet light polarized and controlled by the liquid crystal cell 30b for ultraviolet light is irradiated to the polarized light emitting element 10a, and the polarized light having the same axis as the absorption axis in the ultraviolet range of the polarized light emitting element 10a is irradiated.
  • the light emitting element 10a exhibits polarized light emission.
  • the polarized light emission in the visible range from the polarized light emitting element 10a is transmitted through the liquid crystal cell 30b for ultraviolet light and the polarizing plate O-UVP 70a, and the UV disposed between the polarizing plate O-UVP 70a and the liquid crystal cell 30a for visible light
  • the light is polarized and transmitted through the transmission polarizing plate 70c.
  • the transmitted polarized visible light is controlled in polarization by the visible light liquid crystal cell 30a and used for image display.
  • the visible light whose polarization is controlled by the visible light liquid crystal cell 30a is transmitted through the UV transmission polarizing plate 70c disposed at the outermost side of the display device, so that the displayed image can be observed.
  • the visible light forms polarized light in the visible range by the UV transmission polarizing plate 70c, and the polarized light is controlled by the visible light liquid crystal cell 30a and used for image display.
  • the visible light transmitted through the visible light liquid crystal cell 30a is polarized and transmitted by the UV transmission polarizing plate 70c disposed between the polarizing plate O-UVP 70a and the visible light liquid crystal cell 30a. Further, the transmitted visible light passes through the polarizing plate O-UVP 70a, the liquid crystal cell 30b for ultraviolet light, and the polarized light emitting element 10a. Therefore, the display image displayed by the visible light liquid crystal cell 30a can be observed through the ultraviolet light absorbing element 40b.
  • the polarized light emitting element 10a also has a function to polarize and transmit unabsorbed ultraviolet light
  • the ultraviolet light not absorbed by the polarized light emitting element 10a among the ultraviolet light from the light source 20c is The light is polarized and transmitted by the polarized light emitting element 10a.
  • the ultraviolet light transmitted through the polarized light emitting element 10a is absorbed by the ultraviolet light absorbing element 40b. Therefore, the image displayed on the liquid crystal cell 30b for ultraviolet light can be observed also from the UV transmission polarizing plate 70c side.
  • the light source 20c utilizes ultraviolet light in the liquid crystal cell 30b for ultraviolet light, and in the liquid crystal cell 30a for visible light, polarized light from the polarized light emitting element 10a and the light source
  • the light in the visible range of can be used to display different images. Thereby, it becomes possible to provide different images on the UV transmission polarization plate 70c side and the ultraviolet light absorption element 40b side.
  • Another embodiment of the display device of the present invention is a display device provided with a polarization control element as a polarization element as shown in FIG. 32 to FIG.
  • the polarizing element used in the present invention also has a function of polarizing ultraviolet light.
  • the display apparatus which can display an image etc. on a display using the function to polarize and control this ultraviolet light is demonstrated below.
  • a polarization control element that polarizes and controls at least ultraviolet light in light including at least ultraviolet light, in a state where polarized light emission is extremely weak or polarization light emission can not be seen. means.
  • the display device of such an embodiment includes a liquid crystal cell and a polarization control element as a polarization element.
  • the display apparatus provided with the polarization control element further include, as a polarizing plate, a polarizing plate V + UVP that polarizes both ultraviolet light and visible light, and a UV transmission polarizing plate that transmits ultraviolet light
  • a polarizing plate V + UVP that polarizes both ultraviolet light and visible light
  • a UV transmission polarizing plate that transmits ultraviolet light
  • two more polarizing plates V + UVP are provided, and light (natural light) including visible light and ultraviolet light is irradiated from one surface side of the liquid crystal cell.
  • the display device may further include a light source emitting light 20c including visible light and ultraviolet light.
  • a polarization control element is disposed on the other side of the liquid crystal cell, and a polarizer V + UVP is disposed on one side of the liquid crystal cell to which light including visible light and ultraviolet light is irradiated, and the liquid crystal cell is disposed.
  • the UV transmission polarizing plate is disposed on the side of the polarization control element which is not disposed, or one polarizing plate V + UVP is disposed on one side of the liquid crystal cell irradiated with light, and the liquid crystal cell is disposed.
  • the other polarizing plate V + UVP is disposed on the side of the polarization control element which is not disposed.
  • the UV transmission polarizing plate or the other polarizing plate V + UV has an absorption axis in a direction different from the polarization axis of the polarization control element, in particular, in the orthogonal direction.
  • FIG. 32 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 32 includes a UV transmission polarization plate 70c, a polarization control element 10b stacked on the UV transmission polarization plate 70c, a liquid crystal cell 30 stacked on the polarization control element 10b, and a liquid crystal cell 30.
  • the light transmitting plate 20 includes the laminated polarizing plate V + UVP 70b, and the light 20c including visible light and ultraviolet light is irradiated from the UV transmitting polarizing plate 70c side.
  • the UV transmission polarizing plate 70c is disposed such that the polarization axis of the polarization control element 10b and the absorption axis of the UV transmission polarization plate 70c are different (for example, orthogonally).
  • Ultraviolet light and visible light from light 20c including visible light and ultraviolet light are polarized by the polarizing plate V + UVP 70b and transmitted.
  • ultraviolet light is polarized by the polarization control element 10b, while visible light is used for image display of the liquid crystal cell 30, and passes through the polarization control element 10b as it is.
  • the polarization axis of the polarization control element 10b and the absorption axis of the UV transmission polarization plate 70c are different.
  • the UV transmitting polarizing plate 70c is disposed to Thereby, visible light transmitted through the polarization control element 10b can be transmitted through the UV transmission polarizing plate 70c.
  • the polarized ultraviolet light from the polarization control element 10b is transmitted through the UV transmission polarizing plate 70c as it is. Thereby, in the display device shown in FIG.
  • the light 20c including visible light and ultraviolet light functions as a backlight, it is possible to observe an image from the UV transmission polarizing plate 70c side as a transmissive liquid crystal display device.
  • light 20c containing visible light and ultraviolet light as a backlight may be irradiated from the UV transmission polarizing plate 70c side, in which case an image displayed from the polarizing plate V + UVP 70b side as a transmission type liquid crystal display device It can be observed.
  • the display shown in FIG. 33 is provided with a further polarizing plate V + UVP 70b 'instead of the UV transmitting polarizing plate 70c in the configuration of the display shown in FIG.
  • the polarizing plate V + UVP 70b ′ is disposed so that the polarization axis of the polarization control element 10b is different from the absorption axis of the polarizing plate V + UVP 70b ′ ′.
  • the light 20c from visible light and ultraviolet light The ultraviolet light and the visible light are polarized and transmitted by the polarizing plate V + UVP 70 b.
  • the ultraviolet light is polarized by the polarization control element 10 b, while the visible light is controlled to be polarized by the liquid crystal cell 30.
  • the polarization axis of the polarization control element 10b and the polarization plate are used to prevent visible light transmitted through the polarization control element 10b from being absorbed by the polarization plate V + UVP 70b ′.
  • the polarizers V + UVP 70b ′ are disposed, for example, so as to be orthogonal to each other so that the absorption axis of V + UVP 70b ′ is different.
  • the visible light transmitted through the polarization control element 10b can be transmitted through the polarizing plate V + UVP 70b ', while the polarized ultraviolet light from the polarization control element 10b can also be transmitted through the polarizing plate V + UVP 70b', as shown in FIG.
  • the light 20c containing visible light and ultraviolet light functions as a back light, and as a transmissive liquid crystal display device, an image displayed by controlling the polarization by the liquid crystal cell 30 from the polarizing plate V + UVP 70b ′ side is observed
  • light 20c containing visible light and ultraviolet light as a backlight may be irradiated from the side of the polarizing plate V + UVP 70b ′, in which case it is displayed from the side of the polarizing plate V + UVP 70b as a transmissive liquid crystal display device. Image can be observed.
  • the display device shown in FIG. 34 is further provided with a light reflection layer 50 below the UV transmission polarizing plate 70c.
  • a light reflection layer 50 below the UV transmission polarizing plate 70c.
  • the display device shown in FIG. 35 is further provided with a light absorption layer 40 below the UV transmission polarizing plate 70c.
  • the light absorbing layer 40 may be a layer having various hues, for example, a film having a bright color such as red, blue, yellow, black, or even a pastel color, a plate or the like, and a specific material such as a phosphor. It may be a film, plate or the like that absorbs a wavelength (for example, ultraviolet light) and emits light in the visible light range.
  • light 20c including visible light and ultraviolet light functions as a front light, and therefore, it is possible to observe an image displayed from the polarizing plate V + UVP 70b side as a reflective liquid crystal display device. it can.
  • the structure of the liquid crystal cell 30 is an ultraviolet light that enables display of an image etc. by ultraviolet light. It has a double cell structure of a liquid crystal cell 30 b for light and a liquid crystal cell 30 a for visible light which enables display of an image or the like by visible light.
  • 36 to 39 are schematic diagrams showing the configuration of such a display device. In the display device shown in FIGS.
  • ultraviolet light from light 20c including visible light and ultraviolet light polarized and transmitted through polarizing plate V + UVP 70b is used for display of liquid crystal cell 30b for ultraviolet light
  • visible light from light 20c including visible light and ultraviolet light polarized and transmitted through polarizing plate V + UVP 70b, and visible light reflected through light reflection layer 50 are used for image display of liquid crystal cell 30a for visible light Used for each.
  • the display device shown in FIGS. 36 to 39 since such a double cell structure is adopted, the images formed by the liquid crystal cell 30b for ultraviolet light and the liquid crystal cell 30a for visible light are displayed as separate images. be able to.
  • the order of the liquid crystal cell 30b for ultraviolet light and the liquid crystal cell 30a for visible light is not limited, and the liquid crystal cell 30b for ultraviolet light and the liquid crystal cell 30a for visible light They may be arranged in the opposite way.
  • FIGS. 40 to 45 liquid crystal display Device
  • the display device of such an embodiment includes a liquid crystal cell, a polarization control element as a polarization element, and a polarizer V + UVP that polarizes both ultraviolet light and visible light, and polarizes both ultraviolet light and visible light. Light is emitted.
  • the display device may further include a light source that emits light in which both ultraviolet light and visible light are polarized.
  • a polarization control element is disposed on the other surface side of the liquid crystal cell, and a polarizer V + UVP is disposed on the surface side of the polarization control element on which the liquid crystal cell is not disposed.
  • a polarization control element is disposed on the other surface side of the liquid crystal cell, and a polarizer V + UVP is disposed on the surface side of the polarization control element on which the liquid crystal cell is not disposed.
  • the transmitted light amount of ultraviolet light and transmitted light of polarized light of visible light can be controlled in different axes. It is possible to use light of independent wavelength ranges for display.
  • FIG. 40 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 40 includes a polarizing plate V + UVP 70b, a polarization control element 10b stacked on the polarizing plate V + UVP 70b, and a polarization control element 10b, and can control polarization axes of ultraviolet light and visible light. And a liquid crystal cell 30c.
  • the polarizing plate V + UVP 70 b is disposed such that the polarization axis of the polarization control element 10 b and the absorption axis of the polarizing plate V + UVP 70 b are different.
  • the polarization of the light in the ultraviolet light region is controlled by the ultraviolet light / visible light switching liquid crystal cell 30c And polarized through the polarization control element 10b.
  • the amount of light transmitted by the polarized ultraviolet light from the light 20 d obtained by polarizing both the ultraviolet light and the visible light is controlled.
  • the polarized ultraviolet light from the polarization control element 10b is orthogonal to the absorption axis of the polarizing plate V + UVP 70b, so the polarization axis of the polarization control element 10b and the absorption axis of the polarizing plate V + UVP 70b are arranged to be different, for example, orthogonal. Thereby, the polarized ultraviolet light from the polarization control element 10b can be transmitted through the polarizing plate V + UVP 70b.
  • the polarization of light in the visible light range is controlled by the ultraviolet light / visible light switching liquid crystal cell 30c, polarized light from the light 20d obtained by polarizing both ultraviolet light and visible light is controlled by the polarization control element 10b.
  • the light 20d obtained by polarizing both the ultraviolet light and the visible light functions as a backlight.
  • an image formed by the ultraviolet light / visible light switching liquid crystal cell 30c for ultraviolet light or the visible light liquid crystal cell can be observed from the side of the polarizing plate V + UVP 70b.
  • light 20d obtained by polarizing both ultraviolet light and visible light as backlight may be irradiated from the side of the polarizing plate V + UVP 70b, and in this case, the ultraviolet / visible light switching liquid crystal cell 30c as a transmissive liquid crystal display device. The image displayed from the side can be observed.
  • Such a display device is a display device capable of achieving both polarization control of light in the visible light region and polarization control of light in the ultraviolet light region, and capable of controlling transmission / non-transmission of light in each wavelength region. Therefore, for example, the present invention can be applied to an ultraviolet sensor that controls transmission / shielding of ultraviolet light.
  • the display device shown in FIG. 41 is further provided with a light reflection layer 50 below the polarizing plate V + UVP 70b.
  • a light reflection layer 50 below the polarizing plate V + UVP 70b.
  • the display device shown in FIG. 42 is further provided with a light absorption layer 40 below the polarizing plate V + UVP 70b.
  • the light absorbing layer 40 may be a layer having various hues, for example, a film having a bright color such as red, blue, yellow, black or even a pastel color, a plate or the like, or may be specified like a phosphor.
  • the film may be a film, a plate or the like that absorbs the wavelength of (for example, ultraviolet light) and emits light in the visible light range.
  • light 20d obtained by polarizing both ultraviolet light and visible light functions as a front light.
  • an image displayed from the liquid crystal cell 30c side capable of switching the polarization axis in ultraviolet light / visible light as a reflective display device, and at the same time, an image displayed based on light in the ultraviolet light region
  • An image to be displayed can be controlled based on light in the visible light range.
  • a display device can control transmission / non-transmission of light in each wavelength region, it can be applied to, for example, an ultraviolet sensor that controls transmission / shielding of ultraviolet light.
  • the structure of the liquid crystal cell 30c is capable of displaying an image or the like on the display by ultraviolet light.
  • a visible light liquid crystal cell 30a capable of displaying an image or the like on a display by visible light.
  • 43 to 45 are schematic views showing the configuration of such a display device.
  • polarized ultraviolet light from light 20d in which both ultraviolet light and visible light are polarized is used for image display of the liquid crystal cell 30b for ultraviolet light, while ultraviolet light is used.
  • Polarized visible light from the light 20 d obtained by polarizing both the light and visible light is used for image display of the liquid crystal cell 30 a for visible light.
  • the images displayed with the polarization controlled by the ultraviolet light liquid crystal cell 30b and the visible light liquid crystal cell 30a are different from each other.
  • the order of the liquid crystal cell 30b for ultraviolet light and the liquid crystal cell 30a for visible light is not limited, and the liquid crystal cell 30b for ultraviolet light and the liquid crystal cell 30a for visible light are not limited. They may be arranged in the opposite way.
  • Another embodiment of the display device of the present invention is a novel 3D display device or 3D image display device provided with the polarized light emitting element as a polarizing element.
  • a stereoscopic display device or a stereoscopic image display device including the polarized light emitting element can display stereoscopic vision on the display using polarized light emission while having high transparency in a visible light region. Moreover, such a display device can be manufactured easily and inexpensively, and can be applied as a transparent display capable of stereoscopic display.
  • the polarized light emitting element used in the present invention can also be used for the configuration of a stereoscopic display device or a stereoscopic image display device.
  • the term “stereoscopic display device” as used herein means a device capable of 3D display that does not include cells (for example, liquid crystal cells) for displaying an image using binocular parallax.
  • a stereoscopic image display device means a device capable of 3D display that uses binocular parallax and is provided with a cell (for example, a liquid crystal cell) for displaying an image.
  • 46 to 50 are schematic views showing the configuration of a stereoscopic display provided with the above-mentioned polarized light emitting element
  • FIGS. 51 to 57 are schematic views showing the configuration of a stereoscopic image display provided with the above-mentioned polarized light emitting element .
  • the stereoscopic display device of the present invention displays a polarized light emitting element as a polarizing element, a stereoscopic display control means for enabling stereoscopic display, and stereoscopic display.
  • the display unit is configured to emit light including at least ultraviolet light, particularly ultraviolet light.
  • the display may further comprise a light source emitting light containing at least ultraviolet light, in particular ultraviolet light.
  • the light source is disposed on one side of the display unit.
  • the stereoscopic display control means includes two stereoscopic display control members each independently having a different polarization axis, in order to make stereoscopic vision perceptible by binocular parallax.
  • the display unit includes a first polarized light emitting element and a second polarized light emitting element different in polarization axis from each other, and a plurality of the first polarized light emitting element and the second polarized light emitting element exist respectively.
  • the stereoscopic display control member is not particularly limited as long as it can detect transmission of polarized light emitted from the first polarized light emitting element and the second polarized light emitting element in order for the observer to perceive stereoscopic vision.
  • a general polarizing plate UV non-transmitting polarizing plate
  • a UV transmitting polarizing plate a UV transmitting polarizing plate
  • O-UVP polarizing plate
  • V + UVP polarizing plate
  • the display device (stereoscopic display device) shown in FIG. 46 displays stereoscopic display control members 80 and 80 'each independently having a different polarization axis, and stereoscopic display as stereoscopic display control means for enabling stereoscopic display. And a first polarized light emitting element 10c and a second polarized light emitting element 10c 'whose polarization axes are different from each other.
  • the stereoscopic display control members 80 and 80 ′ may be provided at positions where the observer can perceive stereoscopic vision from the display unit 90 using binocular parallax.
  • the display unit 90 is provided with the first polarized light emitting element 10c and the second polarized light emitting element 10c ', and the display unit 90 from the side where the stereoscopic display control members 80 and 80' are provided. Is irradiated with ultraviolet light 20b.
  • the left and right eyes of the observer can be viewed by the binocular parallax of the stereoscopic display control members 80 and 80 ′ having respectively different polarization axes, for example, 90 ° different polarization axes.
  • only polarized light emission for the left eye is observed in the left eye
  • only polarized light emission for the right eye is observed in the right eye.
  • the polarized light emission observed by these left and right eyes being superimposed and seen, that is, as a result of using binocular parallax, stereoscopic vision of polarized light emission becomes possible on the display section 90.
  • ultraviolet light 20b is applied to the display unit 90 from the side where the stereoscopic display control members 80 and 80 'are not provided in the configuration of the display shown in FIG. Also in the display device shown in FIG. 47, stereoscopic vision of polarized light emission is possible on the display unit 90 according to the same principle as the stereoscopic display device shown in FIG.
  • the display device shown in FIG. 48 is further provided with a visible light absorbing element 40 a such as a black film below the display unit 90. With this configuration, the display device shown in FIG. 48 can perform stereoscopic viewing of polarized light emission with improved contrast.
  • a light reflection layer 50 is further provided below the display unit 90. With this configuration, the display device shown in FIG. 49 enables stereoscopic viewing of bright polarized light.
  • a quarter wave plate 61 which is a retardation plate, as a light control layer between the display unit 90 and the light reflection layer 50.
  • the display device shown in FIG. 50 can perform brightly polarized stereoscopic viewing while suppressing the generation of a double image resulting from the polarized light reflected by the light reflecting layer 50.
  • a stereoscopic image display apparatus using the polarized light emitting element is, as shown in FIGS. 51 to 57, a liquid crystal cell for displaying an image for the left eye and an image for the right eye, a polarized light emitting element as a polarizing element, and a solid.
  • a stereoscopic display control means for enabling display of an image is provided, and light including at least ultraviolet light, particularly ultraviolet light or polarized ultraviolet light is irradiated.
  • the display device may further comprise a light source emitting light containing at least ultraviolet light, in particular ultraviolet light or polarized ultraviolet light.
  • the stereoscopic display control means includes two stereoscopic display control members each independently having a different polarization axis in order to make a stereoscopic image perceptible by binocular parallax.
  • the display device (stereoscopic image display device) shown in FIG. 51 enables display of a stereoscopic image, a liquid crystal cell 30 d capable of displaying an image for the left eye and an image for the right eye, a polarized light emitting element 10 a as a polarizing element.
  • 3D display control means for the purpose 3D display control members 80, 80 'each having a polarization axis different from each other are provided.
  • the stereoscopic display control members 80 and 80 ′ may be provided at positions where the observer can visually recognize a stereoscopic image from the liquid crystal cell 30 d using binocular parallax.
  • the ultraviolet light 20b is applied to the liquid crystal cell 30d from the side where the stereoscopic display control members 80 and 80 'are provided.
  • the function of the liquid crystal cell 30d capable of displaying an image for the left eye and an image for the right eye is, for example, a function capable of controlling polarization for each domain (generally, pixel etc.) for forming an image. It is possible to form an image for the left eye and an image for the right eye for each domain.
  • the polarized light emitting element 10a exhibits polarized light emission by the ultraviolet light 20b irradiated.
  • one stereoscopic display control member causes the left side of the liquid crystal cell 30d to Stereoscopic display such that only one of the image for the eye and the image for the right eye can be displayed, and only the other of the image for the left eye or the image for the right eye of the liquid crystal cell 30d can be displayed by the other stereoscopic display control member
  • the control members 80 and 80 'and the liquid crystal cell 30d are adjusted. As a result, only the image for the left eye is observed in the left eye of the observer, and only the increase for the right eye is observed in the right eye.
  • ultraviolet light 20b is irradiated from the side of the polarized light emitting element 10a where the liquid crystal cell 30d is not provided. Also in the display device shown in FIG. 52, it is possible to display a stereoscopic image by the liquid crystal cell 30d according to the same principle as the stereoscopic image display device shown in FIG.
  • the stereoscopic image display device shown in FIG. 53 is further provided with a visible light absorbing element 40a such as a black film below the polarized light emitting element 10a. With this configuration, the stereoscopic image display device shown in FIG. 53 can display a stereoscopic image with improved contrast.
  • a light reflection layer 50 is further provided below the polarized light emitting element 10a. With this configuration, the stereoscopic image display device shown in FIG. 54 can display a bright stereoscopic image.
  • the three-dimensional image display device shown in FIG. 55 has a quarter wave plate as a light control layer between the polarized light emitting element 10a and the light reflection layer 50 in addition to the configuration of the display device shown in FIG. A wave plate 61 is further provided. Thereby, the stereoscopic image display device shown in FIG. 55 can display a bright stereoscopic image while suppressing the occurrence of double images on the display.
  • polarized ultraviolet light 20a is irradiated instead of the ultraviolet light 20b in the configuration of the display shown in FIGS.
  • the stereoscopic display shown in FIGS. 56 and 57 can also display a stereoscopic image according to the same principle as the display shown in FIGS.
  • the polarized light emitting element used in the present invention can also be used for the configuration of a display having a polarization switching function, as shown in FIGS.
  • a display device having such a polarization switching function is provided with a polarized light emitting element as a polarizing element, a polarization control member for controlling polarized light emission, and a retardation control member capable of controlling the retardation.
  • a light containing at least light, in particular ultraviolet light is emitted.
  • the display may further comprise a light source emitting light containing at least ultraviolet light, in particular ultraviolet light.
  • the polarization control member has a function of transmitting a polarization axis in a certain direction, and is not particularly limited as long as it can detect the wavelength of polarized light emitted from the polarized light emitting element or the transmission of polarized light.
  • Polarizing plate UV non-transmitting polarizing plate
  • UV transmitting polarizing plate UV transmitting polarizing plate
  • polarizing plate O-UVP polarizing plate
  • V + UVP can be used.
  • the phase difference control member may be, for example, a general phase difference plate.
  • the retardation plate as the retardation control member is not limited to one, and two or more retardation plates may be used, or any number may be used.
  • the polarization can be controlled by dynamically switching the angle between the slow axis and the fast axis of the retardation plate to be used.
  • a retardation plate having a retardation value of 1 ⁇ 4 ⁇ to the wavelength indicated by polarized light emission from a polarized light emitting element that is, a so-called 1 ⁇ 4 wavelength plate
  • a straight line emitted by the polarized light emitting element Polarization can be switched from linear polarization to circular polarization by setting the slow axis of the quarter wave plate to 45 ° with respect to the polarization axis of linear polarization.
  • the polarized light emitting element emits light
  • the linearly polarized light can be switched to polarized light having a polarization axis whose polarization direction is rotated by 90 ° by setting the slow axis of the half-wave plate to 45 ° with respect to the polarization axis of the linearly polarized light.
  • the display device shown in FIG. 58 includes a polarization control member 70 for controlling polarized light emission, a first polarized light emitting element 10c and a second polarized light emitting element 10c 'having different polarization axes as polarization elements, and a first polarized light.
  • the polarization control member 70 may be provided at a position where the observer can visually recognize the polarized light emission from the display unit 90 according to the pattern of the polarization axis that the polarization control member 70 has.
  • the ultraviolet light 20 b is emitted from the side where the polarization control member 70 is provided to the surface side of the phase difference control member where the display unit 90 is not disposed.
  • a first polarized light emitting element 10c and a second polarized light emitting element 10c 'whose polarization axes are different from each other are provided independently.
  • the polarization control member 70 is disposed on the surface side of the retardation control member 60 in which the retardation control member 60 is stacked on the display unit 90 and the first polarized light emitting element 10 c and the second polarized light emitting element 10 c ′ are not disposed. They are spaced apart.
  • the ultraviolet light 20b may be irradiated to the first polarized light emitting element 10c and the second polarized light emitting element 10c ', and the light incidence method is not limited.
  • the first polarized light emitting element 10c and the second polarized light emitting element 10c ' have polarization axes different from each other. Therefore, when the ultraviolet light 20b is irradiated to the first polarized light emitting element 10c and the second polarized light emitting element 10c ', the first polarized light emitting element 10c and the second polarized light emitting element 10c' respectively exhibit polarized light emission.
  • the retardation control member 60 and the polarization control member 70 By further irradiating the retardation control member 60 and the polarization control member 70 with polarized light emission via different polarization axes, the first polarized light emitting element 10 c, the second polarized light emitting element 10 c ′, the retardation control member 60
  • the polarized light emission according to the pattern of the polarization axis which each of the polarization control members 70 has can be visually recognized.
  • the polarized light emission is not only linear polarization but also circular polarization, by arbitrarily changing the slow axis of the retardation plate to 0 °, 45 °, etc.
  • Polarized light emission can be controlled to various polarizations, such as elliptically polarized light, or linear polarization having a polarization axis in which the polarization direction of linearly polarized light is rotated by 90 °.
  • polarizations such as elliptically polarized light, or linear polarization having a polarization axis in which the polarization direction of linearly polarized light is rotated by 90 °.
  • the display device having such a configuration, not only the adjustment of the light amount (sensitivity) but also the hue and the viewing angle can be changed.
  • a colorless and transparent retardation plate preferably a colorless and transparent retardation film
  • the polarization light emission from the first polarized light emitting element 10c and the second polarized light emitting element 10c ' is polarization controlled
  • the member 70 the color of the visible light and the amount of light change.
  • the polarized light emission from the first polarized light emitting element 10 c or the second polarized light emitting element 10 c ′ not passing through the polarization control member 70 is viewed on the display unit 90 as a simple light emitting surface.
  • polarized light emission passes through a colorless and transparent retardation film
  • another polarized light emission can be visually recognized by controlling the retardation. That is, polarized light emission visually recognized without passing through the polarization control member 70 can only be recognized as a colorless and transparent film provided on the display unit 90 in which light emission is shown.
  • the polarization control member 70 not only has a polarization switching function capable of recognizing and controlling polarized light emission, but also the polarization control member 70, the first polarized light emitting element 10c and the second polarized light emitting element High security that the intended light emission that can be displayed on the display unit 90 can not be viewed when all of the three conditions of the polarization axis pattern of 10c ′ and the polarization control by the retardation plate as the retardation control member 60 are satisfied A function can also be given.
  • ultraviolet light 20b is disposed on the surface side of the display unit 90 where the phase difference control member 60 is not disposed in the configuration of the display device shown in FIG.
  • polarized light emission can be visually recognized on the display unit 90 according to the same principle as the display device shown in FIG.
  • the display device shown in FIG. 60 is further provided with a visible light absorbing element 40a such as a black film below the display unit 90. With this configuration, the display device shown in FIG. 60 can visually recognize polarized light with improved contrast. Further, in the embodiment shown in FIG. 61, in addition to the configuration of the display device shown in FIG. 58, a light reflection layer 50 is further provided below the display unit 90. With this configuration, the display device shown in FIG. 61 can perform bright polarized light stereoscopic vision.
  • the display shown in FIGS. 62 to 65 has the first polarized light emitting element 10c and the second polarized light emitting element having different polarization axes in the configurations of the display shown in FIGS. 58 to 61.
  • the liquid crystal cell 30 and the polarized light emitting element 10a are disposed, and the liquid crystal cell 30 is disposed between the polarized light emitting element 10a and the retardation control member 60. ing.
  • a polarization switching function capable of recognizing and controlling polarized light emission, but also the polarization control member 70, the pattern of polarization axes of the polarized light emitting element 10a, and retardation control.
  • the retardation plate When all three conditions of polarization control by the retardation plate are satisfied as the member 60, in addition to the high security function of being able to construct an image, a more sophisticated and complex image display becomes possible.
  • Self-luminous liquid crystal display Another embodiment of the display device of the present invention is a novel self-emission liquid crystal display device including the above-mentioned polarized light emitting element as a polarizing element.
  • a self-luminous liquid crystal display device is a polarizing light emitting element as a polarizing element, a liquid crystal cell, a colored light transmission filter, and a polarizing plate for 400 to 480 nm as shown in FIGS. 66 to 69.
  • a light source including at least ultraviolet light, in particular, ultraviolet light.
  • the display may further comprise a light source emitting light containing at least ultraviolet light, in particular ultraviolet light.
  • a light source emitting light containing at least ultraviolet light, in particular ultraviolet light.
  • such a display device emits light by itself from the polarized light emitting element. Therefore, it is possible to provide a liquid crystal display device with extremely high utilization efficiency of light in the visible light region as compared to the conventional liquid crystal display device in which light from the backlight is reduced by a polarizing plate having a transmittance of 35 to 45%. It is possible.
  • the liquid crystal display device has wide viewing angle, even if it does not have bonding of various retardation plates required for improvement of viewing angle dependency, or a complicated liquid crystal cell structure. Have.
  • a display device comprising a liquid crystal cell, a colored light transmission filter, a polarizing plate O-UVP for polarizing ultraviolet light, and a polarized light emitting element as a polarizing element.
  • the light containing at least light is emitted from one side of the liquid crystal cell where the colored light transmission filter is not disposed.
  • the display device may further include a light source emitting light including at least ultraviolet light, particularly ultraviolet light.
  • a colored light transmission filter is disposed in the liquid crystal cell or on the other side of the liquid crystal cell, and a polarizing plate O-UVP is disposed on one side of the liquid crystal cell to which light containing at least ultraviolet light is irradiated,
  • the polarized light emitting element is disposed on the other side of the liquid crystal cell.
  • a liquid crystal cell that dynamically controls the phase is provided between the polarizing plate O-UVP and the polarized light emitting plate. Therefore, when the polarized light emitting element exhibits white light emission, it becomes possible to control white light emission and non-light emission by the liquid crystal cell.
  • the polarized light emitting element emits blue light, it is possible to provide a self-luminous liquid crystal display device with extremely high utilization efficiency of blue light without using a blue color filter as a colored light transmission filter.
  • FIG. 66 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 66 includes a polarizing plate O-UVP 70a, a liquid crystal cell 30 stacked on the polarizing plate O-UVP 70a, a polarized light emitting element 10a stacked on the liquid crystal cell 30, and a polarized light emitting element 10a.
  • Light 20 including at least ultraviolet light, in particular ultraviolet light 20b is irradiated from the side of the polarizing plate O-UVP 70a.
  • the display device may further comprise a light source emitting light 20 containing at least ultraviolet light, in particular ultraviolet light 20b.
  • the light source is disposed on one side of the liquid crystal cell (on the side where the polarized light emitting element 10 a is not disposed).
  • a light diffusion plate 110 may be further disposed on the surface side of the polarizing plate O-UVP 70a where the liquid crystal cell 30 is not disposed.
  • the light diffusion plate 110 is arbitrarily disposed in accordance with the light amount of the ultraviolet light 20b and the like.
  • the colored light transmission filter 100 includes a blue color filter 101, a green color filter 102, and a red color filter 103, and is designed to enable color display for each display segment.
  • the polarized light emitting element 10a which absorbed the ultraviolet light through the polarizing plate O-UVP 70a exhibits polarized light emission.
  • the polarized light emission from the polarized light emitting element 10a can be displayed in color for each display segment by the blue color filter 101, the green color filter 102, and the red color filter 103 included in the colored light transmission filter 100.
  • the light emission color can be converted to a desired color, and it is also possible to control the white light emission and the non-light emission by the liquid crystal cell 30.
  • the blue color filter 101 is removed from the colored light transmission filter 100 in the configuration of the display shown in FIG.
  • a self-luminous liquid crystal display device with high utilization efficiency of blue light without using the blue color filter 101 as the colored light transmission filter 100 is provided. Is possible.
  • the self-luminous liquid crystal display device includes a liquid crystal cell, a colored light transmission filter, a polarizing plate selected from the group consisting of a polarizing plate V + UVP, a UV transmitting polarizing plate, and a UV non-transmitting polarization, and a polarizing element
  • a polarizing plate selected from the group consisting of a polarizing plate V + UVP, a UV transmitting polarizing plate, and a UV non-transmitting polarization, and a polarizing element
  • the display device may further include a light source emitting light including at least ultraviolet light, particularly ultraviolet light.
  • a colored light transmission filter is disposed on the other side of the liquid crystal cell, and a polarized light emitting element is disposed on one side of the liquid crystal cell to which light containing at least ultraviolet light is irradiated, and a colored light transmission filter A polarizer is disposed between the liquid crystal cell and the liquid crystal cell.
  • polarized light emitted from the polarized light emitting element is irradiated to the colored light transmission filter through the polarizing plate, so that it is possible to provide a high-contrast self-emission liquid crystal display device. It becomes.
  • FIG. 68 is a schematic view showing the configuration of such a display device.
  • the display device shown in FIG. 68 includes a polarized light emitting element 10a, a liquid crystal cell 30 stacked on the polarized light emitting element 10a, a UV nontransmissive polarizing plate 70d stacked on the liquid crystal cell 30, and a UV nontransmissive polarizing plate 70d.
  • a colored light transmission filter 100 stacked on the upper side is provided, and light 20 containing at least ultraviolet light, particularly ultraviolet light 20b, is irradiated from the side of the polarized light emitting element 10a.
  • the display device may further comprise a light source emitting light 20 containing at least ultraviolet light, in particular ultraviolet light 20b.
  • the light source is disposed on one side of the liquid crystal cell (the side on which the polarized light emitting element 10a is disposed).
  • a light diffusion plate 110 may be further disposed on the surface side of the polarized light emitting element 10a where the liquid crystal cell 30 is not disposed.
  • the light diffusion plate 110 is arbitrarily disposed in accordance with the light amount of the ultraviolet light 20b and the like.
  • the colored light transmission filter 100 includes a blue color filter 101, a green color filter 102, and a red color filter 103, and is designed to enable color display for each display segment.
  • the polarized light emitting element 10 a exhibits polarized light emission by being irradiated with the ultraviolet light 20 b.
  • the polarized light emitted from the polarized light emitting element 10a is irradiated to the colored light transmission filter 100 through the UV non-transmissive polarizing plate 70d. Since color display is possible for each display segment by the blue color filter 101, the green color filter 102, and the red color filter 103 included in the colored light transmission filter 100, when the polarized light emitting element 10a emits white light, a desired emission color is desired. Can be converted to In addition, since the polarized light emitted from the polarized light emitting element 10a is irradiated to the colored light transmission filter through the UV non-transmissive polarizing plate 70d, it is possible to provide a high-contrast self-emission type liquid crystal display device.
  • a 400-480 nm polarizing plate 70e is disposed instead of the UV non-transmissive polarizing plate 70d in the configuration of the display shown in FIG. 68, and the colored light transmission filter 100 to the blue color filter 101 has been removed.
  • a self-emission type liquid crystal display device with extremely high utilization efficiency of blue light without using the blue color filter 101 as the colored light transmission filter 100 is provided. It becomes possible.
  • the polarizing element has a function of absorbing ultraviolet light to exhibit polarized light emission in the visible light range, and also has a function of controlling ultraviolet light to be polarized. Therefore, even if the polarized light emitting property of the polarizing element is weak or the polarized light emitting property is lost because the polarizing element hardly absorbs or does not absorb the ultraviolet light, the polarizing element is It acts as a polarizing element that polarizes only light. Therefore, the polarizing element may be provided as a polarized light emitting element having a function of exhibiting polarized light emission, or may be provided as a polarization control element having a function of controlling ultraviolet light to be polarized.
  • the polarized light emitting element has a high visible light correction single transmittance, preferably 60% or more, preferably 70% or more, more preferably 80%, particularly preferably 90% or more in the visible light range, preferably 380 nm to 780 nm have.
  • a display device having Such a polarizing element is manufactured, for example, by adsorbing and orienting a dichroic dye as a material that emits light, on a substrate such as a film.
  • the polarized light directly emitted from the polarizing element can be light emission having polarization in a specific axis, it can be designed not only for specific axis but also light emission having elliptical polarization or circular polarization.
  • the formulation can be realized not only by uniaxially stretching a substrate impregnated with a dichroic dye but also by diagonal stretching and stretching in two or more axes. Preferably, it is possible to emit a constant polarized light in one axis.
  • the polarizing element is provided as a polarized light emitting element
  • the polarized light emitting element converts polarized light emission by converting the absorbed light energy of ultraviolet light into light of another wavelength, that is, energy which emits light in the visible light range. Show. Therefore, cholesteric liquid crystals that reflect light of a specific wavelength as circularly polarized light at that wavelength are not included in the material of the polarized light emitting element exhibiting such characteristics.
  • the base material of the polarizing element contains a dichroic dye which is a material exhibiting a polarized light emitting property. Therefore, the substrate is preferably a film obtained by forming a hydrophilic polymer or the like capable of adsorbing a dichroic dye.
  • hydrophilic polymers are not particularly limited, and examples thereof include polyvinyl alcohol resins, amylose resins, starch resins, cellulose resins, and polyacrylate resins. Among such resins, polyvinyl alcohol resins or derivatives thereof are preferable from the viewpoint of the dyeability, processability, crosslinkability, etc. of dichroic dyes.
  • polyvinyl alcohol resins or derivatives thereof examples include polyvinyl alcohol or derivatives thereof, polyvinyl alcohol or derivatives thereof such as ethylene, olefins such as propylene, crotonic acid, acrylic acid, methacrylic acid, and maleic acid Resin etc. which were denatured with unsaturated carboxylic acid etc. are mentioned.
  • polyvinyl alcohol (PVA) films are preferable from the viewpoint of the adsorptivity and orientation of the dichroic luminescent light emitting dye.
  • the base material may be, for example, a commercially available product, or may be produced by forming a polyvinyl alcohol-based resin.
  • the thickness of the substrate can be appropriately designed, but is preferably in the range of 5 ⁇ m to 150 ⁇ m, and more preferably in the range of 20 ⁇ m to 100 ⁇ m.
  • a polyvinyl alcohol-based resin is formed in the form of a film as a substrate, and then, the film contains a dichroic dye serving as a material exhibiting polarized luminescence. Thereafter, an orientation treatment such as stretching is applied to the obtained film, and further, a boric acid treatment, a washing treatment, and a drying treatment can be performed to produce the polarizing element of the present invention.
  • dichroic dye to be adsorbed and oriented on the substrate.
  • a compound having at least one of a stilbene skeleton and a biphenyl skeleton in a molecule and having no azo group or a salt thereof as a material for imparting polarized luminescence property to a polarizing element used in the present invention Is preferred.
  • the dichroic dye has an azo group in the molecule, although a high degree of polarization can be realized as in a conventional dye-based polarizing element, the azo group absorbs light emitted, and the amount of emitted light is significantly reduced.
  • a dichroic dye it is preferable to use a compound having no azo group in the molecule or a salt thereof.
  • a dichroic dye exhibits fluorescence and has a dichroic ratio, and thus can emit polarized light. Therefore, a polarized light emitting dye having at least one of a stilbene skeleton and a biphenyl skeleton in the molecule is excellent in fluorescence emission characteristics and also has a characteristic of having a high dichroic ratio by being oriented to a substrate. These characteristics are attributed to the skeletons of the stilbene skeleton and the biphenyl skeleton.
  • One of the compounds having a stilbene skeleton which does not have an azo group is preferably a compound represented by the formula (1) or a salt thereof.
  • the groups L and M each independently have a nitro group, an amino group which may have a substituent, a carbonylamide group which may have a substituent, or a substituent Naphthotriazole group, alkyl group having 1 to 20 carbon atoms which may have a substituent, vinyl group which may have a substituent, amido group which may have a substituent, substituted It may be a ureido group which may be substituted, or an aryl group which may have a substituent, or a carbonyl group which may have a substituent, but it is not limited thereto.
  • the compound having a stilbene skeleton represented by the formula (1) exhibits fluorescence and dichroism can be obtained by orientation. Since the light emission characteristics are attributed to the stilbene skeleton, the substituent to which each of the groups L and M can be bound is not particularly limited as long as it has no azo group, and any substituent may be used. May be there.
  • an amino group which may have a substituent for example, an unsubstituted amino group; Methylamino group, ethylamino group, n-butylamino group, tertiary butylamino group, n-hexylamino group, dodecylamino group, dimethylamino group, diethylamino group, di-n-butylamino group, ethylmethylamino group, An alkylamino group having 1 to 20 carbon atoms which may have a substituent such as ethylhexylamino group; An arylamino group which may have a substituent such as phenylamino group, diphenylamino group, naphthylamino group, N-phenyl-N-naphthylamino group; An alkylcarbonylamino group having 1 to 20 carbon atoms which may have a substituent such as methylcarbonylamino group,
  • arylsulfonylamino which may be mentioned.
  • an alkylcarbonylamino group having 1 to 20 carbon atoms which may have a substituent an arylcarbonylamino group which may have a substituent, an alkylsulfonylamino group having 1 to 20 carbons, a substituent
  • the aryl sulfonylamino group which may have is preferable.
  • carbonylamido group which may have a substituent, for example, N-methyl-carbonylamido group (-CONHCH 3 ), N-ethyl-carbonylamido group (-CONHC 2 H 5 ), N-phenyl-carbonylamido Groups (-CONHC 6 H 5 ) and the like.
  • alkyl group having 1 to 20 carbon atoms which may have a substituent for example, a straight chain such as methyl group, ethyl group, n-butyl group, n-hexyl group, n-octyl group or n-dodecyl group
  • Branched C 3 -C 10 alkyl group such as C 1 -C 12 alkyl group, isopropyl group, sec-butyl group, tert-butyl group, cyclic C 3 -C 7 such as cyclohexyl group, cyclopentyl group and the like
  • An alkyl group etc. are mentioned. Among these, a linear or branched alkyl group is preferable, and a linear alkyl group is more preferable.
  • vinyl group which may have a substituent examples include ethenyl group, styryl group, vinyl group having alkyl group, vinyl group having alkoxy group, divinyl group, pentadiene group and the like.
  • the aryl group may be a 5- or 6-membered heterocyclic group containing 1 to 3 hetero atoms selected from the group consisting of nitrogen atom, oxygen atom and sulfur atom as ring member atoms.
  • a heterocyclic group containing an atom selected from a nitrogen atom and a sulfur atom as a ring constituent atom is preferable.
  • Examples of the carbonyl group which may have a substituent include methylcarbonyl group, ethylcarbonyl group, n-butyl-carbonyl group, phenylcarbonyl group and the like.
  • the substituent mentioned above is not particularly limited, but, for example, nitro group, cyano group, hydroxyl group, sulfonic acid group, phosphoric acid group, carboxyl group, carboxyalkyl group, halogen atom, alkoxy group, aryloxy group Etc.
  • a carboxyalkyl group a methyl carboxyl group, an ethyl carboxyl group etc. are mentioned, for example.
  • a halogen atom a fluorine atom, a chlorine atom, a bromine atom, an iodine atom etc. are mentioned.
  • an alkoxy group a methoxy group, an ethoxy group, a propoxy group etc. are mentioned.
  • the aryloxy group include phenoxy group and naphthoxy group.
  • Examples of the compound represented by the formula (1) include Kayaphor series (manufactured by Nippon Kayaku Co., Ltd.), Whiteex RP and the like Whitetex series (manufactured by Sumitomo Chemical Co., Ltd.), and the like. Although the compound shown by Formula (1) below is illustrated, it is not limited to these.
  • the other compound having a stilbene skeleton not having an azo bond is preferably a compound represented by the following formula (2) or formula (3) or a salt thereof.
  • a compound represented by the following formula (2) or formula (3) or a salt thereof By using these compounds, it is possible to obtain a polarized light emitting element that emits sharper white light.
  • the compounds represented by the following formulas (2) and (3) also exhibit fluorescence due to the stilbene skeleton, and dichroism can be obtained by orientation.
  • the group X represents a nitro group or an amino group which may have a substituent.
  • the amino group which may have a substituent is defined in the same manner as the amino group which may have a substituent in the above formula (1), and it may have a substituent and which has 1 to 20 carbon atoms. It is preferably an amino group, an arylcarbonylamino group which may have a substituent, an alkylsulfonylamino group having 1 to 20 carbon atoms, or an arylsulfonylamino group which may have a substituent.
  • the group X is preferably a nitro group.
  • the group R is a hydrogen atom, a halogen atom such as chlorine atom, bromine atom or fluorine atom, a hydroxyl group, a carboxyl group, a nitro group, an alkyl group which may have a substituent, and substitution Represents an alkoxy group which may have a group, or an amino group which may have a substituent.
  • the alkyl group which may have a substituent is the same as the alkyl group having 1 to 20 carbon atoms which may have a substituent in the above formula (1).
  • the alkoxy group which may have a substituent is preferably a methoxy group or an ethoxy group.
  • the amino group which may have a substituent is defined in the same manner as the amino group which may have a substituent in the above formula (1), preferably a methylamino group, a dimethylamino group, an ethylamino group, a diethylamino group. A group, or a phenylamino group or the like.
  • the group R may be bonded to any carbon of the naphthalene ring in the naphthotriazole ring, but when the carbon fused to the triazole ring is at the 1 and 2 positions, the 3, 5, or 8 position It is preferred that the bond be attached to a position.
  • n is an integer of 0 to 3, preferably 1.
  • — (SO 3 H) may be bonded to any carbon atom of the naphthalene ring in the naphthotriazole ring.
  • the group R is a hydrogen atom and n is 1.
  • the group Y may have an alkyl group having 1 to 20 carbon atoms which may have a substituent, a vinyl group which may have a substituent, or a substituent Represents an aryl group.
  • an aryl group which may have a substituent is preferable, and a naphthyl group which may have a substituent is more preferable, and a naphthyl group in which an amino group and a sulfo group are substituted as a substituent Is particularly preferred.
  • the group Z is defined in the same manner as the group X in the above formula (2), and is preferably a nitro group.
  • the compound having a biphenyl skeleton having no azo group is preferably a compound represented by the following formula (4) or a salt thereof.
  • the groups P and Q each independently have a nitro group, an amino group which may have a substituent, a carbonylamide group which may have a substituent, or a substituent Naphthotriazole group, an alkyl group having 1 to 20 carbon atoms which may have a substituent, a vinyl group which may have a substituent, an amido group which may have a substituent, and a substituent
  • the ureido group which may be substituted, the aryl group which may have a substituent, and the carbonyl group which may have a substituent are shown, it is not limited to these. However, when it has an azo group at the P position and / or the Q position of the biphenyl skeleton, the fluorescence emission is significantly reduced, which is not preferable.
  • the compound represented by the above formula (4) is preferably a compound represented by the following formula (5).
  • j represents an integer of 0 to 2.
  • the groups R 1 , R 2 , R 3 and R 4 are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an aralkyloxy group, They are an alkenyloxy group, an alkylsulfonyl group having 1 to 4 carbon atoms, an arylsulfonyl group having 6 to 20 carbon atoms, a carbonamido group, a sulfonamido group, and a carboxyalkyl group.
  • the position to which the groups R 1 to R 4 are bonded is not particularly limited, but when the vinyl group is at the 1-position, the 2-position, the 4-position, the 6-position is preferable, and the 4-position is particularly preferable.
  • alkyl group having 1 to 4 carbon atoms examples include methyl group, ethyl group, propyl group, n-butyl group, sec-butyl group, tert-butyl group and cyclobutyl group.
  • alkoxy group having 1 to 4 carbon atoms examples include a methoxy group, an ethoxy group, a propoxy group, an n-butoxy group, a sec-butoxy group, a tert-butoxy group and a cyclobutoxy group.
  • aralkyloxy group examples include aralkyloxy groups having 7 to 18 carbon atoms.
  • alkenyloxy group examples include, for example, an alkenyloxy group having 1 to 18 carbon atoms.
  • alkylsulfonyl group having 1 to 4 carbon atoms examples include a methylsulfonyl group, an ethylsulfonyl group, a propylsulfonyl group, an n-butylsulfonyl group, a sec-butylsulfonyl group, a tertiary butylsulfonyl group, a cyclobutylsulfonyl group and the like. It can be mentioned.
  • arylsulfonyl group having 6 to 20 carbon atoms examples include phenylsulfonyl group, naphthylsulfonyl group, biphenylsulfonyl group and the like.
  • the compound represented by the above formula (5) can be prepared by a known method, for example, can be synthesized by condensing 4-nitrobenzaldehyde-2-sulfonic acid with a phosphonate and then reducing the nitro group .
  • Specific examples of such a compound represented by the formula (5) include the following compounds described in JP-A-4-226162.
  • the salts of the compounds represented by the formulas (1) to (5) mean that the free acids of the respective compounds represented by the above formulas form salts with inorganic cations or organic cations.
  • inorganic cations include alkali metals such as lithium, sodium, potassium and other cations, or ammonium (NH 4 + ).
  • organic cation the organic ammonium etc. which are represented by following formula (A) are mentioned, for example.
  • groups Z 1 to Z 4 each independently represent a hydrogen atom, an alkyl group, a hydroxyalkyl group or a hydroxyalkoxyalkyl group, and at least any one of Z 1 to Z 4 is It is a group other than a hydrogen atom.
  • the group Z 1 to Z 4 include, for example, a C 1 to C 6 alkyl group such as methyl group, ethyl group, butyl group, pentyl group and hexyl group, preferably a C 1 to C 4 alkyl group; Hydroxy, C 1 -C 6 alkyl groups such as 2-hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl, 4-hydroxybutyl, 3-hydroxybutyl, 2-hydroxybutyl, etc., preferably hydroxy C 1 -C 4 alkyl group; and hydroxy C 1 -C 6 alkoxy such as hydroxyethoxymethyl group, 2-hydroxyethoxyethyl group, 3-hydroxyethoxypropyl group, 3-hydroxyethoxybutyl group, 2-hydroxyethoxybutyl and the like C 1 -C 6 alkyl group, preferably hydroxy C 1 -C 4 alkoxy C 1 And -C 4 alkyl group and the like.
  • a C 1 to C 6 alkyl group
  • inorganic cations or organic cations cations of sodium, potassium, lithium, monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, ammonium and the like are more preferable, Particular preference is given to inorganic cations of lithium, ammonium or sodium.
  • the dichroic dye having the structure as described above does not have an azo group in the molecule, so that the absorption of light due to the azo bond is suppressed.
  • a compound having a stilbene skeleton exhibits a light emitting action by irradiation with ultraviolet light, and the molecule is stabilized by the presence of a strong carbon-carbon double bond of the stilbene skeleton. Therefore, a polarizing element using a dichroic dye having such a specific structure can absorb ultraviolet light and utilize its energy to exhibit a polarized light emitting action in the visible light region.
  • the polarizing element exhibiting the above-mentioned characteristics further contains at least one kind of fluorescent dye and / or organic dye different from the dichroic dye which is a compound represented by the above-mentioned formulae, as long as the polarizing performance of the polarizing element is not impaired You may contain.
  • fluorescent dye to be used in combination for example, C.I. I. Fluorescent Brightener 5, C.I. I. Fluorescent Brightener 8, C.I. I. Fluorescent Brightener 12, C.I. I. Fluorescent Brightener 28, C.I. I. Fluorescent Brightener 30, C.I. I. Fluorescent Brightener 33, C.I. I. Fluorescent Brightener 350, C.I. I. Fluorescent Brightener 360, C.I. I. Fluorescent Brightener 365 etc. are mentioned.
  • organic dyes see, for example, C.I. Eye. direct. Yellow 12, Sea. Eye. direct. Yellow 28, Sea. Eye. direct. Yellow 44, C.I. Eye. direct. Orange 26, Sea. Eye. direct. Orange 39, Sea. Eye. direct. Orange 71, Sea. Eye. direct. Orange 107, C.I. Eye. direct. Red 2, Sea. Eye. direct. Red 31, Sea. Eye. direct. Red 79, Sea. Eye. direct. Red 81, Sea. Eye. direct. Red 247, Sea. Eye. direct. Blue 69, Sea. Eye. direct. Blue 78, Sea. Eye. direct. Green 80 and C.I. Eye. direct. Green 59 and the like.
  • These organic dyes may be free acids or may be alkali metal salts (eg Na, K, Li), ammonium salts or salts of amines.
  • the polarizing element which shows polarized light emission can be obtained by mix
  • the light emission color which a polarizing element shows it is desirable for absolute value of chromaticity a * measured according to JISZ8781-4: 2013 to be 5 or less, and absolute value of hue b * to be 5 or less.
  • the emission of polarized light having an absolute value of chromaticity a * of 5 or less and an absolute value of hue b * of 5 or less means that white polarized light emission is obtained.
  • the chromaticity a * value and the hue b * value in accordance with the standard of JIS Z 8781-4: 2013 are values obtained at the time of measuring the hue of light.
  • the display method of the object color defined in the standard corresponds to the display method of the object color defined by the International Commission on Illumination (abbr .: CIE).
  • the measurement of the chromaticity a * value and the hue b * value is usually performed by irradiating natural light to the measurement sample, but in the polarizing element used in the present invention, the light of the ultraviolet light region is irradiated to the polarizing element
  • the chromaticity a * value and the hue b * value can be confirmed by measuring the emitted light.
  • the hue b * of the emitted light can be perceived as white if the absolute value of the hue b * is 5 or less, but preferably 4 or less, more preferably 3 or less, more preferably 2 or less, particularly Preferably it is 1 or less.
  • the absolute values of the chromaticity a * value and the b * value are each independently 5 or less, it can be perceived as white by the human eye, and if each is 5 or less, It can be perceived as more preferable white light emission. Since the polarized light to be emitted is white, it can be used as a natural light source such as sunlight, a light source for paper white terminals and the like.
  • a polarizing element can be used as a white polarized light emitting polarizing element, and application to a display using a color filter or the like is simple.
  • colored light transmission filters red, blue and green color filters are provided for each of the display segments electrically driven by the liquid crystal cell, and white light is emitted to each color filter to color each display segment. It becomes possible to provide a self-luminous liquid crystal display device capable of display.
  • the emitted light intensity of white light if emitted light can be visually detected, it is possible to apply to a display. In order for the light emission to be sensed visually, it is particularly important that the light emission has a high degree of polarization and that the transmission in the visible range is high.
  • the polarizing element When the polarizing element has a maximum emission wavelength in the wavelength range of 400 to 480 nm, a polarizing element exhibiting blue emission can be produced.
  • a polarizing element By using such a polarizing element for a display device, it is possible to provide a self-luminous liquid crystal display device with high utilization efficiency of blue light.
  • the polarized light emitting element is irradiated with light in a non-visible light region such as an ultraviolet light region, absorbs light in the ultraviolet light region, and exhibits polarized light emission in a visible light region using the energy. Since the light emitted by the polarized light emitting element is polarized light in the visible light region, when the polarized light emitting element is observed through a general polarizing plate having a polarizing function with respect to light in the visible light region, the visible light region Polarized light emission and non-emission can be visually recognized by changing the angle of the axis of a general polarizing plate having a polarization function.
  • the polarization degree of the polarized light emitted by the polarized light emitting element is 70% or more, preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 99% or more.
  • the polarized light emitting element transmits light in the visible light region without absorbing it.
  • the transmittance of light in the visible light region of the polarized light emitting element is 60% or more, preferably 70% or more, more preferably 80% or more, still more preferably 85% or more, particularly preferably 60% or more, in the visible light correction transmittance. 90% or more. Since such a polarized light emitting element has a high degree of polarization, the absorption in the visible light region becomes small in the non-emission state, and a polarized light emitting element with high transparency can be obtained.
  • a polarizing element is not limited to the following manufacturing methods, it is preferable to mainly orientate these compounds as a dichroic dye mentioned above to the film using polyvinyl alcohol or its derivative (s) .
  • a method of manufacturing a polarized light emitting device will be described by taking polyvinyl alcohol or a derivative thereof as an example.
  • the method for producing a polarizing element comprises the steps of preparing a substrate, swelling the substrate by immersing the substrate in a swelling liquid, and swelling the substrate, and making the swollen substrate one of the dichroic dyes described above.
  • a dyeing process in which a dyeing solution containing at least the above is impregnated and a dichroic dye is adsorbed on the substrate, and a substrate on which the dichroic dye is adsorbed is dipped in a solution containing boric acid.
  • a crosslinking step of crosslinking the dye in the substrate a stretching step of uniaxially stretching the substrate obtained by crosslinking the dichroic dye in a predetermined direction to align the dichroic dye in a predetermined direction, and as necessary And a washing step of washing the stretched substrate with a washing solution and / or a drying step of drying the washed substrate.
  • the swelling step is preferably performed by immersing the above-mentioned substrate in a swelling solution at 20 to 50 ° C. for 30 seconds to 10 minutes, and the swelling solution is preferably water.
  • the draw ratio of the substrate by the swelling solution is preferably adjusted to 1.00 to 1.50 times, and more preferably adjusted to 1.10 to 1.35 times.
  • One or more dichroic dyes are adsorbed to the substrate obtained through the above-mentioned swelling step.
  • the dyeing process is not particularly limited as long as the dichroic dye can be adsorbed to the substrate.
  • the substrate is dipped in a dyeing solution containing the dichroic dye, the substrate And a method of applying a dyeing solution containing a dichroic dye.
  • the method of immersing in a staining solution containing a dichroic dye is preferable.
  • the concentration of the dichroic dye in the staining solution is not particularly limited as long as the dichroic dye is sufficiently adsorbed in the substrate, and for example, 0.0001 to 1% by mass in the staining solution Is preferably, and more preferably 0.0001 to 0.5% by mass.
  • the temperature of the dyeing solution in the dyeing step is preferably 5 to 80 ° C., more preferably 20 to 50 ° C., particularly preferably 40 to 50 ° C.
  • the time for which the substrate is immersed in the staining solution can be appropriately adjusted, and is preferably adjusted between 30 seconds and 20 minutes, and more preferably between 1 and 10 minutes.
  • the dichroic dyes contained in the staining solution may be used alone or in combination of two or more. Since the above-mentioned dichroic dye has different emission colors due to the difference in the dye structure, etc., the substrate can contain one or more kinds of the above-mentioned dichroic dyes so that the resulting emission colors become various colors. It can be adjusted. In addition, if necessary, the staining solution may further contain one or more of organic dyes and / or fluorescent dyes different from the dichroic dye.
  • the blending ratio of the fluorescent dye or the organic dye is not particularly limited depending on the preparation purpose, generally, the total amount of the other fluorescent dye and / or the organic dye is 0 with respect to 100 parts by mass of the polarizing element. It is preferable to use in the range of .01 to 10 parts by mass.
  • a dyeing assistant may be further used in combination.
  • the dyeing assistant include sodium carbonate, sodium hydrogencarbonate, sodium chloride, sodium sulfate (sodium sulfate), anhydrous sodium sulfate, sodium tripolyphosphate and the like, with preference given to sodium sulfate.
  • the content of the dyeing assistant can be optionally adjusted by the above-mentioned immersion time, temperature at the time of dyeing, etc. based on the dyeability of the dichroic dye to be used, but in 0.0001 to 10% by mass in the dyeing solution Is preferable, and more preferably 0.0001 to 2% by mass.
  • the washing solution is generally used as the washing solution.
  • the washing method is preferably to immerse the dyed substrate in the washing solution, while washing can also be carried out by applying the washing solution to the substrate.
  • the washing time is not particularly limited, but is preferably 1 to 300 seconds, and more preferably 1 to 60 seconds.
  • the temperature of the cleaning solution in the preliminary cleaning step needs to be a temperature at which the material constituting the substrate does not dissolve, and the cleaning process is generally performed at 5 to 40.degree.
  • the preliminary cleaning step may be omitted because the performance of the polarized light emitting device is not particularly affected without the preliminary cleaning step.
  • the crosslinker can be contained in the substrate after the dyeing step or the pre-cleaning step. It is preferable to immerse a base material in the processing solution containing a crosslinking agent as a method of making a base material contain a crosslinking agent, and on the other hand, you may apply
  • a crosslinking agent in the treatment solution a solution containing boric acid is used. Although the solvent in the treatment solution is not particularly limited, water is preferred. The concentration of boric acid in the treatment solution is preferably 0.1 to 15% by mass, and more preferably 0.1 to 10% by mass.
  • the temperature of the treatment solution is preferably 30 to 80 ° C., and more preferably 40 to 75 ° C.
  • the treatment time of this crosslinking step is preferably 30 seconds to 10 minutes, and more preferably 1 to 6 minutes.
  • the polarizing element obtained by this crosslinking step exhibits high contrast. This is a completely unexpected effect from the function of boric acid used in the prior art for the purpose of improving water resistance or light transmission.
  • the fix treatment may be further performed with an aqueous solution containing a cationic polymer compound. The fixing process makes it possible to immobilize the dye in the polarized light emitting element.
  • a cationic polymer compound for example, dicyanamide as a dicyanamide and formalin polymerization condensate, polycyanate as a dicyandiamide • diethylenetriamine polycondensate, polycation as an epichlorohydrin • dimethylamine addition polymer, dimethyldiallylammonate A sodium chloride / dioxide ion copolymer, a diallylamine salt polymer, a dimethyldiallyl ammonium chloride polymer, a polymer of allylamine salt, a dialkylaminoethyl acrylate quaternary salt polymer or the like is used.
  • the stretching step is carried out.
  • the stretching step is performed by uniaxially stretching the substrate in a fixed direction, and may be either a wet stretching method or a dry stretching method.
  • the draw ratio is preferably 3 times or more, more preferably 5 to 8 times, still more preferably 5 to 8 times the draw ratio in an aqueous solution containing boric acid.
  • the substrate is preferably stretched in water, a water-soluble organic solvent or a mixed solution thereof. More preferably, the stretching treatment is performed while immersing the substrate in a solution containing at least one crosslinking agent.
  • the crosslinking agent for example, boric acid in the crosslinking agent step can be used, and preferably, the stretching treatment can be performed in the treatment solution used in the crosslinking step.
  • the stretching temperature is preferably 40 to 70 ° C., and more preferably 45 to 60 ° C.
  • the stretching time is usually 30 seconds to 20 minutes, preferably 2 to 7 minutes.
  • the wet drawing process may be carried out by one-step drawing or by two or more multi-step drawing.
  • the stretching may optionally be carried out before the dyeing step, in which case the orientation of the dye can also be carried out at the time of dyeing.
  • the stretching heating medium when the stretching heating medium is an air medium, it is preferable to stretch the substrate at a temperature of the air medium of from normal temperature to 180 ° C.
  • the humidity is preferably in an atmosphere of 20 to 95% RH.
  • the method for heating the substrate include, but are not limited to, a roll-to-roll zone drawing method, a roll heating drawing method, a hot pressure drawing method, an infrared heating drawing method, and the like.
  • the dry stretching step may be carried out in one step of stretching or in two or more steps of multi-step stretching.
  • a cleaning step of cleaning the surface of the substrate can be performed.
  • the washing time is preferably 1 second to 5 minutes.
  • the cleaning method preferably immerses the substrate in the cleaning solution, while the cleaning solution can also be cleaned by coating or coating on the substrate. Water is preferred as the cleaning solution.
  • the washing treatment may be carried out in one step, or may be carried out in two or more steps.
  • the temperature of the washing solution in the washing step is not particularly limited, but is usually 5 to 50 ° C., preferably 10 to 40 ° C., and may be normal temperature.
  • the solvent of the solution or treatment liquid used in each of the above-mentioned steps other than the above water, for example, dimethyl sulfoxide, N-methyl pyrrolidone, methanol, ethanol, propanol, isopropyl alcohol, glycerin, ethylene glycol, propylene glycol, diethylene glycol And alcohols such as triethylene glycol, tetraethylene glycol or trimethylolpropane, amines such as ethylene diamine and diethylene triamine, and the like.
  • the solvent of the solution or treatment solution is, but not limited to, most preferably water.
  • the solvent of these solutions or a process liquid may be used individually by 1 type, and may use 2 or more types of mixtures.
  • the substrate is dried.
  • the drying process can be performed by natural drying, it can be performed by compression with a roll or removal of water on the surface by an air knife, a water absorption roll, etc., in order to further increase the drying efficiency. It is also possible to do.
  • the temperature of the drying treatment is preferably 20 to 100 ° C., and more preferably 60 to 100 ° C.
  • the drying time is preferably 30 seconds to 20 minutes, and more preferably 5 to 10 minutes.
  • the polarizing element used in the display device according to the present invention can be manufactured by the above-described manufacturing method, and the obtained polarizing element has high durability.
  • the polarizing element used in the present invention may be provided with a protective film on one side or both sides of the substrate.
  • the protective film is used to improve the water resistance and handleability of the polarizing element, and does not affect the polarizing function of the polarizing element.
  • the protective film is a transparent protective film formed using a transparent material.
  • a protective film is a film having a layer shape capable of maintaining the shape of the polarizing element, and is preferably a plastic or the like excellent in transparency, mechanical strength, thermal stability, water blocking property, etc. You may use the protective film which consists of another material which may have the function equivalent to these plastics.
  • the plastic constituting the protective film include thermoplastic resins such as polyester resins, acetate resins, polyethersulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, and acrylic resins.
  • thermosetting resins such as acrylic resins, urethane resins, acrylic urethane resins, epoxy resins, silicone resins, etc., and UV curable resins, among which polyolefin resins include amorphous polyolefins.
  • polyolefin resins include resins having polymerized units of cyclic polyolefin such as norbornene monomers or polycyclic norbornene monomers.
  • TAC triacetyl cellulose
  • norbornene made of a cellulose acetate resin is particularly preferable.
  • the protective film may be subjected to a hard coating treatment or an antireflection treatment, or a treatment for the purpose of prevention of sticking, diffusion, antiglare, etc., as long as the effects of the present invention are not impaired.
  • the thickness of the protective film can be appropriately designed, but is preferably in the range of 1 ⁇ m to 200 ⁇ m, more preferably in the range of 5 ⁇ m to 150 ⁇ m, and particularly preferably 10 ⁇ m to 100 ⁇ m.
  • the liquid crystal cell of a general structure includes, for example, a pair of oppositely disposed substrates and a liquid crystal layer sandwiched between the pair of substrates, and can control the phase of polarization by controlling the alignment of the liquid crystal.
  • the phase of the light By controlling the phase of the light, the polarization of light can be controlled, and when sandwiched by a general polarizing plate, transmission / non-transmission of light can be controlled, and an image can be displayed on the liquid crystal display device.
  • the drive mode of the liquid crystal cell is also not particularly limited, and various methods such as TN type, STN, VA type, IPS type, OCB type, ECB type can be used.
  • the substrate used in the liquid crystal cell is not particularly limited as long as the substrate is transparent, and, for example, a glass substrate made of a glass material such as ITO, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polypropylene, polychloride It may be a flexible substrate made of a resin such as vinyl, polyamide, polyimide, polyamide imide, polyether sulfone and polyphenylene sulfide.
  • the TN liquid crystal cell when no voltage is applied, the alignment direction of liquid crystal molecules adjacent to one substrate is twisted by 90 ° with respect to the alignment direction of liquid crystal molecules adjacent to the other substrate. As the voltage is applied, the liquid crystal molecules gradually rise vertically, thereby changing from white (bright) display to black (dark) display.
  • the TN liquid crystal cell is an STN liquid crystal cell manufactured so that the twist angle of the alignment of the liquid crystal molecules when the voltage is not applied is 180 ° to 270 ° between the substrates on both sides. Good.
  • the VA liquid crystal cell when no voltage is applied, the liquid crystal molecules are aligned substantially vertically, and when the voltage is applied, the liquid crystal molecules are aligned substantially horizontally.
  • the VA liquid crystal cell also includes an MVA liquid crystal cell in which the VA system is multi-domained in order to widen the viewing angle.
  • the VA liquid crystal cell may be a VA liquid crystal cell using a display method such as a PVA (Patterned Vertical Alignment) type, an Optical Alignment type, or a PSA (Polymer-Sustained Alignment).
  • the liquid crystal molecules when no voltage is applied, the liquid crystal molecules are aligned substantially parallel to the substrate, and when the voltage is applied, the liquid crystal molecules rotate in the lateral direction, and the liquid crystal molecules are planar. Respond Since there is no vertical tilt of liquid crystal molecules, a liquid crystal cell with a wide viewing angle can be obtained.
  • liquid crystal molecules when no voltage is applied, liquid crystal molecules are substantially aligned in an arc shape with respect to the substrate, and when voltage is applied, the liquid crystal molecules are aligned substantially perpendicularly. Since liquid crystal molecules flow in the same direction with application of a voltage, a liquid crystal cell with high response speed can be obtained.
  • a polarizing element a polarized light emitting element showing polarized light emission to light in the visible light range by absorption of light containing at least ultraviolet light, or light in at least ultraviolet light range with light containing at least ultraviolet light. Since a polarization control element that controls the polarization of light is used, it is possible to further include a light source that emits at least ultraviolet light. Such light sources include a light source for irradiating ultraviolet light, a light source for irradiating polarized ultraviolet light, a light source for irradiating both ultraviolet light and visible light, and a light source for irradiating light in which both ultraviolet light and visible light are polarized. It can be used.
  • Examples of the light source for irradiating ultraviolet light include, but are not limited to, black light, UV lamp, UV-LED and the like, but are not limited to these, and various irradiation devices and irradiation devices can be used.
  • the light source for irradiating polarized ultraviolet light can be emitted, for example, by irradiating the ultraviolet light from the irradiation device or the irradiation device via a known polarizing plate for polarizing the ultraviolet light, a polarizing film or the like.
  • Examples of light sources that emit both ultraviolet light and visible light include ultraviolet-visible fiber light sources provided with a deuterium lamp for the ultraviolet region and a tungsten lamp for the visible region, but are not limited thereto.
  • the ultraviolet light of external light can also be utilized as a light source which irradiates both ultraviolet light and visible light.
  • a light source for irradiating light in which both ultraviolet light and visible light are polarized for example, a known polarizing plate, polarizing film or the like can be used as a light source for irradiating both ultraviolet light and visible light.
  • Various display devices of the present invention can include a light control layer for controlling light emitted from the polarizing element and light emitted from the light source.
  • the thickness of such a light control layer is usually in the range of 1 to 100 ⁇ m, preferably in the range of 2 to 60 ⁇ m.
  • the light absorbing layer is provided to absorb light emitted from the polarizing element and light emitted from the light source.
  • a light absorbing layer for example, a known visible light absorbing element having high light absorbency and light shielding properties such as a black sheet, a black film, a black plate and the like manufactured using black pigment such as carbon black or black dye can do.
  • black pigment such as carbon black or black dye
  • it may be a color plate such as red, blue or yellow, a sheet having a bright hue of pastel color, a film, or a fluorescent plate capable of absorbing light and emitting fluorescence.
  • the material capable of absorbing light is not limited to these, and it is also possible to provide a light absorbing layer made of any material, such as suppressing reflection of light or reusing a specific light wavelength.
  • an ultraviolet light absorbing element preferably an ultraviolet light absorbing film
  • the ultraviolet light absorbing element is provided to prevent adverse effects of ultraviolet light on the eye of the observer.
  • an ultraviolet light absorbing element for example, a known ultraviolet light absorbing element having a function capable of absorbing ultraviolet light, such as polyester manufactured using an ultraviolet light absorbing agent, polycarbonate resin, etc. can be used. It is not limited and an ultraviolet light absorbing element made of any material having the function can be used.
  • the transmittance of the visible light region of the ultraviolet light absorbing element is preferably 70% to 99%, and 80% to 99%. It is more preferable that
  • the light reflection layer is provided to reflect light emitted from the polarizing element and light emitted from the light source.
  • a light reflection layer for example, a film or sheet having a reflection layer on which silver, aluminum or the like is deposited, a white sheet or film produced using a white pigment such as titanium dioxide particles or calcium carbonate, etc.
  • a white pigment such as titanium dioxide particles or calcium carbonate
  • the retardation control member is an optical medium having retardation, and examples thereof include a wave plate and a retardation plate called a retardation film.
  • Light has the property of particles and waves, but expressing light as a wave means that the phase of the wave can be controlled.
  • the retardation plate is an optical functional element that gives a predetermined phase difference to linearly polarized light, and the polarization is different from the other axis (for example, 90 ° with respect to light of a particular axis) In the axis) it is possible to provide different phases.
  • the retardation plate is an element capable of changing the polarization state of incident light by providing a phase difference between two orthogonal polarization components using an oriented birefringence material (for example, a stretched film) or the like. It is.
  • the slow axis of the ⁇ / 2 retardation plate is set at 45 ° to the polarization axis of linearly polarized light
  • the angle of the linearly polarized light with respect to the polarization axis can be up to an error of about 10 ° with respect to 45 °, preferably in the range of 40 to 50 °, more preferably in the range of 42 to 48 °, particularly preferably 44 to It is preferable to arrange
  • the depolarizing film is, for example, a member from which depolarization is achieved by control with a specific high retardation, and specific examples thereof include “SRF” manufactured by Toyobo Co., Ltd. It is also possible to use for depolarizing the light which radiate
  • the transmittance of the depolarizing film is preferably 50 to 99%, more preferably 70 to 99%, and still more preferably 80 to 99%.
  • the retardation plate is not particularly limited, and examples thereof include a half wave plate and a quarter wave plate. Specifically, for the wavelength of 540 nm, a retardation plate having a phase difference of 135 nm is equivalent to 1/4 ⁇ .
  • the quarter wavelength plate is not limited to these, and a retardation plate made of any material can be used.
  • a quarter wave plate is preferable.
  • Such a retardation plate for example, a quarter-wave plate or a half-wave plate, may be, for example, polycarbonate or cyclone uniaxially stretched so as to have a phase difference equivalent to 1 ⁇ 4 of the wavelength of incident light.
  • a quarter wave plate such as a film of olefin polymer can be used.
  • the display device of the present invention may further include a light emitting element from the polarizing element and a polarizing plate (polarization controlling member) for polarizing the light emitted from the light source.
  • the thickness of such a polarizing plate is usually in the range of 10 to 200 ⁇ m, preferably in the range of 10 to 180 ⁇ m.
  • the transmittance of the visible light region of the polarizing plate can be the same as that of a general polarizing plate, It is 35% to 50%, preferably 38% to 45%, and more preferably 40% to 44%.
  • the polarizing plate O-UVP polarizes and transmits ultraviolet light and has high transmittance in the visible light range, it transmits visible light with almost no polarization control or extremely low degree of polarization. It has a function.
  • a polarizing plate O-UVP is not particularly limited as long as it has the function, and for example, a polarizing film in which a water-soluble compound having an ultraviolet light polarizing function is drawn, for example, WO 2005/0
  • the polarizing plate provided with the polarizing film described in the 015275 grade etc. can be used.
  • the above-mentioned function means that the polarization degree in the ultraviolet light range is 80% or more, and preferably 90% or more. It is preferably 99% or more, and particularly preferably 99.9% or more.
  • the degree of polarization in the ultraviolet light range is 90% or more, more preferably 99% or more.
  • the polarizing plate V + UVP has a function capable of providing a polarization function to both ultraviolet light and visible light.
  • a polarizing plate V + UVP is not particularly limited as long as it has the function.
  • a water-soluble compound capable of imparting an ultraviolet light polarization function and a general two-color capable of imparting a visible light polarization function It is possible to use a polarizing plate comprising a polarizing film blended with a sexing dye, adsorbed to the substrate and then stretched.
  • a polarizing plate V + UVP can be used as a polarizing plate capable of polarizing not only ultraviolet light but also visible light.
  • the UV transmission polarizing plate has low absorption of ultraviolet light and high transmittance in the ultraviolet light range, and on the other hand, polarizes and transmits visible light coaxially incident on the polarizing axis of the polarizing plate, but And has a function of transmitting or hardly transmitting visible light coaxially incident thereon. It is preferable that the degree of polarization in the ultraviolet light region of the UV transmission polarizing plate has no polarization function or a low polarization function.
  • Such a UV transmitting polarizing plate is not particularly limited as long as it has the function, and for example, a polarizing plate including a common dichroic dye having a visible light polarizing function as a polarizing film is used. can do.
  • a more preferable UV transmitting polarizing plate can be produced. Since a polarizing plate using a common dichroic dye does not have strong absorption in the ultraviolet light range, it can be used as a polarizing plate capable of transmitting light in the ultraviolet light range.
  • the transmittance of such a polarizing plate is preferably 30% or more, more preferably 40% or more in the ultraviolet light region, while having a polarization function of 90% or more in the visible light region. Is more preferably 50% or more, and particularly preferably 60% or more.
  • the UV non-transmissive polarizing plate does not transmit ultraviolet light, but polarizes and transmits visible light coaxially incident on the polarizing axis of the polarizing plate, but transmits visible light coaxially incident on the absorption axis of the polarizing plate It has a function that is not or hardly transmitted. That is, it means a general polarizing plate having a function of cutting ultraviolet light.
  • Such a UV non-transmissive polarizing plate is not particularly limited as long as it has the function, and a generally commercially available polarizing plate, that is, a general iodine-based polarizing plate or the like may be used. it can.
  • a UV non-transmissive polarizing plate for example, an iodine based polarizing plate SKN series or KN series manufactured by Polatechno Co., Ltd. can be used.
  • a polarizing plate for 400 to 480 nm can be used to polarize and transmit light in the wavelength range of 400 to 480 nm, and exhibits yellow to orange light as it has light absorption in the wavelength range of 400 to 480 nm. .
  • the high visibility with a high transmittance at 550 nm mainly allows the transmittance with a high visibility. With respect to transmitted visible light other than light in the wavelength region of 400 to 480 nm, it has a function of transmitting visible light which is not substantially polarization controlled or has a significantly low degree of polarization.
  • such a function has a degree of polarization of 80% or more, preferably 90% or more, in the wavelength range of 400 to 480 nm when the visibility correction transmittance in the visible light range is 60% or more. It is more preferably 99% or more, particularly preferably 99.9% or more. In a particularly preferred embodiment, when the visibility correction transmittance in the visible light range is 80% or more, the degree of polarization in the wavelength range of 400 to 480 nm is 90% or more, more preferably 99% or more.
  • a polarizing plate for 400 to 480 nm is not particularly limited as long as it has the function.
  • a polarizing film in which an azo compound having high dichroism in a wavelength range of 400 to 480 nm is oriented The polarizing plate which has can be used suitably.
  • a dichroic dye having a yellow or orange color can be used as an azo compound having high dichroism in a wavelength range of 400 to 480 nm.
  • Such a dichroic dye is not particularly limited.
  • I. Direct Yellow 12 C.I. I. Direct Yellow 72, C.I. I. Direct orange 39, C.I. I.
  • the compounds described in Direct Orange 72, WO 2007/138980 can be used.
  • the stereoscopic display device or the stereoscopic image display device of the present invention is provided with a stereoscopic display control member for enabling stereoscopic vision using binocular parallax.
  • a three-dimensional display control member only needs to have a function that can be controlled as polarized light that allows light having different polarization axes to be transmitted between the left eye and the right eye, for example, lenses of polarized glasses, etc.
  • the said function may be provided by providing, the phase difference plate which a different phase difference permeate
  • the colored transmitted light filter may be a colored transmitted light filter generally used for liquid crystal display devices. Specifically, it is a color filter having a filter function capable of converting white into red, blue, green and yellow.
  • a material of the color filter for example, "Application of functional dye, 1st edition issue version CMC company publication, Irie Masahiro ed., P87-95", "functional dye 1st edition edition, CMC company publication, Tokita
  • the dyes described in “Sumio ed., P41-50” can be mentioned, but not limited thereto.
  • the material of the color filter is a material including light in the ultraviolet light region to be irradiated, a dye capable of converting the wavelength of light emitted from the polarized light emitting element into light of another color, quantum dots (quantum rods), etc.
  • the dye in this case may be a dye or a pigment.
  • a quantum dot (quantum rod) is a nanoscale colloidal semiconductor and has a function capable of adjusting the band gap (color) by the size of the colloid.
  • the color filter plays a role of converting light in the ultraviolet light range which can not be visually recognized by human eyes or light emitted by irradiating the polarized light emitting element with light in the ultraviolet light region to red, yellow, green, blue and the like.
  • the material of the color filter is preferably a dye capable of converting light in the ultraviolet light region or light emitted from a polarized light emitting element into light of another color such as red, yellow, green or blue, and quantum dots .
  • wavelength-convertible dyes and quantum dots are exemplified. These may be used alone or in combination of two or more.
  • a fluorescent dye which emits fluorescence of 590 nm for example, perylene dyes: Rumogen red, Rumogen yellow, Rumogen orange, other body dye dyes, squaraine dyes and the like can be mentioned.
  • various dyes direct dyes, acid dyes, basic dyes, disperse dyes, etc.
  • fluorescent dyes that absorb light in the ultraviolet light region to blue green wavelength region and emit fluorescence in the red region (highest emission luminance at 600 to 700 nm, preferably 600 to 640 nm) include, for example, DCJTB; Rhodamine B, Rhodamine dyes such as Rhodamine 6G, Rhodamine 3B, Rhodamine 101, Rhodamine 110, Sulforhodamine, Basic Violet 11 and Basic Red 2; 4-Dicyanomethylene-2-methyl-6- (p-dimethylaminostyryl) -4H-pyran Cyanine dyes such as (DCM); pyridine dyes such as 1-ethyl-2- [4- (p-dimethylaminophenyl) -1,3-butadienyl] -pyridinium perchlorate (pyridine 1); or oxazine And dyes and the like. Furthermore, various fluorescent dyes (direct dyes, acid dyes, basic dyes, disperse dyes, etc.)
  • a fluorescent dye that absorbs light in the ultraviolet light range to blue-green wavelength range and emits fluorescence in the green range is, for example, 3- (2'-) Benzothiazolyl) -7-diethylaminocoumarin (coumarin 6), 3- (2'-benzoimidazolyl) -7-N, N-diethylaminocoumarin (coumarin 7), 3- (2'-N-methylbenzimidazolyl) -7-N, Coumarin dyes such as N-diethylaminocoumarin (coumarin 30), 2,3,5, 6-1H, 4H-tetrahydro-8-trifluoromethylquinolizine (9, 9a, 1-gh) coumarin (coumarin 153), Alternatively, basic yellow 51, which is a coumarin dye-based dye, solvent yellow 11, solvent yellow 116, etc.
  • phthalimide-based dyes such as phthalimide-based dyes, and the like.
  • soluble tris (8-quinolinolate) aluminum-containing dendrimer AlClq 3 as described in, for example, “Japanese Journal of Polymer Science and Technology, 63 (10), 675, (2006)” may be used.
  • various fluorescent dyes direct dyes, acid dyes, basic dyes, disperse dyes, etc. can also be used.
  • quantum dots examples include the compounds described in “Preparation and characterization of nanophosphors that convert near-ultraviolet light into red and green wavelengths, 2010, Keio University graduate School of Science and Technology Research Institute Takeshi Shimoshita”, "CSH-530-04” (made by Nippon Kantam Design Co., Ltd.) as a pigment capable of wavelength conversion of blue light to green light and "CSH-655-04” as a pigment capable of wavelength conversion of blue light to red light Etc. are mentioned.
  • the colored transmission light filter may be provided at any position in the configuration of the display device, for example, may be provided in a liquid crystal cell as in a general liquid crystal display device, or with a polarized light emitting element
  • the arrangement positions of the liquid crystal cell, the surface of the liquid crystal display device, the polarizing plate and the liquid crystal cell, etc. are not limited.
  • the colored transmission light filter is preferably provided on the display side (observer side) with respect to the polarized light emitting element provided in the display device.
  • a polarized light emitting element which emits blue light having a maximum emission wavelength in a wavelength range of 400 to 480 nm, absorbs blue light of 400 to 480 nm, and 530
  • a colored light transmission filter having at least one color filter emitting fluorescence in the wavelength range of ⁇ 670 nm
  • White light by including a blue light emitter having a maximum emission wavelength in the wavelength range of 400 to 480 nm and a phosphor having a part or all of the emission spectrum in the wavelength range of 530 to 670 nm for the polarized light emitting element.
  • White light emission is possible like LED.
  • a medium having the maximum emission wavelength in the wavelength range of 400 to 480 nm, a medium having the maximum emission wavelength in the wavelength range of 530 to 570 nm, and a medium having the maximum emission wavelength in the wavelength range of 600 to 650 nm When the light emitting medium is provided as a fluorescence emitting medium having a part or all of the emission spectrum in each wavelength range, such a fluorescence emitting medium functions as a preferable white light emitter.
  • the color filters emitting fluorescence when at least one of the color filters emitting fluorescence has the maximum emission wavelength in the wavelength range of 530 to 570 nm, it functions as a color filter emitting green light. Therefore, the emission color can be converted to green by using a color filter having the maximum emission wavelength in the wavelength range of 530 to 570 nm.
  • the color filters emitting fluorescence has a maximum emission wavelength in the wavelength range of 600 to 650 nm, it functions as a color filter emitting red. Therefore, the emission color can be converted to red by using a color filter having the maximum emission wavelength in the wavelength range of 600 to 650 nm.
  • the color light transmission filter includes a color filter having the maximum emission wavelength in the wavelength range of 530 to 570 nm and a color filter having the maximum emission wavelength in the wavelength range of 600 to 650 nm, whereby the emission color is a green portion It is possible to distinguish and convert into red parts.
  • the configuration of the liquid crystal display device is a polarizing plate O-UVP / liquid crystal cell while the emission color of the polarized light emitting element shows blue emission having a maximum emission wavelength in 400 to 480 nm.
  • blue light can be converted to red, yellow, and green by using a color filter having a dye capable of wavelength conversion from blue light.
  • the arrangement position of the colored transmission light filter is an example, and for example, the colored transmission light filter may be provided in the liquid crystal cell or between the liquid crystal cell and the polarized light emitting element.
  • the configuration of the liquid crystal display device is a polarized light emitting element / liquid crystal cell while the emission color of the polarized light emitting element exhibits blue emission having a maximum emission wavelength in 400 to 480 nm.
  • Polarizer V + UVP, UV transmissive polarizer or UV non-transmissive polarizer / colored light transmissive filter in this order. Also in this configuration, when light in the ultraviolet region is irradiated from the side of the polarized light emitting element to make the polarized light emitting element emit blue light, utilization efficiency of blue light can be enhanced without using a blue color filter.
  • blue light can be converted to red, yellow, and green by using a color filter having a dye capable of wavelength conversion from blue light.
  • the arrangement position of the colored transmitted light filter is an example, and for example, the colored transmitted light filter is between the polarized light emitting element and the liquid crystal cell, in the liquid crystal cell, or between the liquid crystal cell and the polarizing plate. May be provided.
  • the various display devices described above may be appropriately provided with known various functional layers such as a hard coat layer, an antiglare layer, or an antistatic layer, as necessary.
  • various functional layers such as a hard coat layer, an antiglare layer, or an antistatic layer, as necessary.
  • the method of coating the material which has various functionality on the exposed surface of the structural member used for the various display apparatuses of this invention is preferable, and on the other hand, it has such a function. It is also possible to bond the layer or film to the exposed surface of the component via an adhesive or adhesive.
  • various display devices may be used alone, and OLED (Organic Light Emitting Diode), inorganic LED (Light Emitting Diode), LCD (Liquid crystal display), CRT (Cathode Ray Tube), FED (Field Emission Display) Etc. may be used in combination with other displays.
  • the display device of the present invention is capable of displaying an image, a moving image, a character or the like using polarized light emission of a polarizing element while having high transparency in the visible light region, It can be used on the front as a transparent display that can provide an image different from other displays.
  • various display devices in the present invention can be manufactured by applying the display configuration of a conventional display device, they can be manufactured easily and inexpensively.
  • the obtained intermediate (62.3 parts of the formula (6)) was added to 300 parts of water and stirred, and adjusted to pH 10.0 with a 25% aqueous sodium hydroxide solution.
  • To the resulting solution were added 20 parts of 28% aqueous ammonia and 9.0 parts of copper sulfate pentahydrate, and the mixture was stirred at 90 ° C. for 2 hours.
  • To the resulting reaction solution 25 parts of sodium chloride was added, and the precipitated solid was separated by filtration and further washed with 100 parts of acetone to obtain 40.0 parts of a wet cake of a compound of the formula (7).
  • the wet cake was dried with a hot air dryer at 80 ° C. to obtain 20.0 parts of a compound ( ⁇ max: 376 nm) of the following formula (7).
  • composition example 2 A commercially available sodium 4,4'-diaminostilbene-2,2'-disulfonate 41.4 parts was added to 300 parts of water and stirred, and the pH was adjusted to 0.5 using 35% hydrochloric acid. 10.9 parts of 40% aqueous sodium nitrite solution is added to the obtained solution and stirred at 10 ° C. for 1 hour, and then 34.4 parts of 6-aminonaphthalene-2-sulfonic acid is added, and a 15% aqueous sodium carbonate solution is used. The pH was adjusted to 4.0 and stirred for 4 hours. 60 parts of sodium chloride was added to the obtained reaction liquid, and the precipitated solid was separated by filtration and further washed with 100 parts of acetone to obtain 124.0 parts of a wet cake of a compound of the formula (8) as an intermediate. .
  • a polarized light emitting element (hereinafter also referred to as a polarized light emitting element).
  • a triacetyl cellulose film (ZRD-60 manufactured by Fujifilm Co., Ltd.) containing no UV absorber is treated with a 1.5 N aqueous solution of sodium hydroxide at 35 ° C. for 10 minutes, washed with water, and then dried at 70 ° C. for 10 minutes I did.
  • the triacetyl cellulose film obtained by alkali treatment is laminated on both sides of the white polarized light emitting device obtained above via an aqueous solution containing 4% of polyvinyl alcohol resin (NH-26 manufactured by Nippon Shokubai B & B Co., Ltd.) After drying at 70 ° C.
  • a polarized light emitting plate was obtained.
  • the obtained polarized light emitting plate was irradiated with ultraviolet light, it showed white light emission, and when the light emission was confirmed through a polarizing plate, it was confirmed to have polarized light.
  • the present polarized light emitting plate is described as a white polarized light emitting type polarizing plate.
  • a polarized light emitting plate was obtained in the same manner as in the preparation of the white polarized light emitting polarizing plate except that the compound (7) obtained in Synthesis Example 1 was not used.
  • this polarized light emitting plate is described as a blue polarized light emitting type polarizing plate.
  • the obtained film was immersed in a 3% aqueous boric acid solution for 5 minutes at 50 ° C. and stretched 5 times.
  • the film obtained by stretching was washed with water at normal temperature for 20 seconds while maintaining tension, and dried to obtain a UV transmitting polarizing element.
  • UV transmission polarizing plate (Production of UV transmission polarizing plate)
  • a triacetylcellulose film (ZRD-60 manufactured by Fujifilm Co., Ltd.) containing no ultraviolet absorber are treated with a 1.5 N aqueous solution of sodium hydroxide at 35 ° C. for 10 minutes, washed with water, and then 70 ° C. Dried for 10 minutes.
  • the triacetyl cellulose film obtained by the alkali treatment is laminated via an aqueous solution containing 4% of a polyvinyl alcohol resin (NH-26 manufactured by Nippon Shokubai Bokubar Co., Ltd.) on both sides of the UV transmitting polarizing element prepared above.
  • the resultant was dried at 70 ° C. for 10 minutes to obtain a polarizing plate.
  • the polarizing plate is described as a UV transmitting polarizing plate.
  • the film obtained by stretching is washed with water at normal temperature for 20 seconds while maintaining tension, and dried to have a maximum polarization degree at 450 nm and for 400 to 480 nm having a polarization action of 400 to 480 nm A polarizing element was obtained.
  • the film obtained by stretching is washed with water at normal temperature for 20 seconds while maintaining tension, and dried to have a maximum polarization at 408 nm and a polarization function for light of 350 to 420 nm.
  • a polarizing element O-UVP was obtained.
  • polarizing plate O-UVP Preparation of polarizing plate O-UVP
  • a triacetylcellulose film ZRD-60 manufactured by Fujifilm Co., Ltd.
  • a 1.5 N aqueous solution of sodium hydroxide at 35 ° C. for 10 minutes, washed with water, and then 70 ° C. Dried for 10 minutes.
  • the triacetyl cellulose film obtained by alkali treatment is laminated via an aqueous solution containing 4% of polyvinyl alcohol resin (NH-26 manufactured by Nippon Shokubai Bokubar Co., Ltd.) on both sides of the polarizing element O-UVP prepared above
  • the resultant was dried at 70 ° C. for 10 minutes to obtain a polarizing plate.
  • the polarizing plate is referred to as polarizing plate O-UVP.
  • the obtained film was immersed in a 3% aqueous boric acid solution for 5 minutes at 50 ° C. and stretched 5 times.
  • the film obtained by stretching was washed with water at normal temperature for 20 seconds while maintaining tension, and dried to obtain a polarizing element V + UVP.
  • UV non-transmissive polarizing plate As a UV non-transmissive polarizing plate, SKN-18243P manufactured by Polatechno Co., Ltd. was used.
  • the UV non-transmissive polarizing plate is a general polarizing plate having a high polarization function in the visible light range and having extremely low transmittance of light in the ultraviolet light range.
  • the single transmittance Ts, the parallel transmittance Tp, and the orthogonal transmittance Tc of each polarizing plate were measured using a spectrophotometer (“U-4100” manufactured by Hitachi, Ltd.).
  • the single transmittance Ts is the transmittance of each wavelength when each polarizing plate is measured on one sheet.
  • the parallel transmittance Tp is a spectral transmittance of each wavelength measured by superposing two polarizing plates with their absorption axis directions parallel to each other.
  • the orthogonal position transmittance Tc is a spectral transmittance obtained by superposing two polarizing plates so that their absorption axes are orthogonal to each other. The measurements were taken over a wavelength of 220-780 nm.
  • (C) Visibility correction single transmittance Ys The visibility-corrected single transmittance Ys of each polarizing plate is JIS Z 8722: 2009 for the single transmittance Ts measured at a predetermined wavelength interval d ⁇ (here, 5 nm) in the wavelength range of 400 to 700 nm in the visible light range.
  • the transmittance corrected to the visibility according to Specifically, the single transmittance Ts was substituted into the following formula (II) to calculate.
  • P ⁇ represents the spectral distribution of standard light (C light source)
  • y ⁇ represents a two-degree visual field color matching function.
  • the polarization function of the ultraviolet light region in each obtained polarizing plate and the polarizing plate in the visible light region can be known.
  • the polarized light emitting type polarizing plate has absorption in the ultraviolet light region and exhibits a high degree of polarization. From this, it is understood that the polarized light emitting polarizing plate can have a function of controlling ultraviolet light to be polarized. In addition, since the polarized light emitting type polarizing plate exhibits a visible light correction single transmittance as a transmittance in the visible light region of 90% or more, the polarized light emitting type polarizing plate has a polarization controlling element function in the ultraviolet light region. It has been found that while having, it exhibits high transparency in the visible light region.
  • the white polarized light emitting type polarizing plate and the blue polarized light emitting type polarizing plate both have absorption in the ultraviolet light region and show a high degree of polarization. From this, it is understood that the white polarized light emitting type polarizing plate and the blue polarized light emitting type polarizing plate can have a function of controlling ultraviolet light to be polarized.
  • the white polarized light emitting type polarizing plate and the blue polarized light emitting type polarizing plate show 90% or more of the visibility correction single transmittance as the transmittance in the visible light range, and therefore the white polarized light emitting type polarizing plate and the blue polarized light emitting type polarizing plate It has been found that the polarized light emitting type polarizing plate exhibits high transparency in the visible light region while having a polarization control element function in the ultraviolet light region.
  • each polarizing plate (measurement sample) obtained above are installed, and the polarized light emitted by each measurement sample is measured using a spectral irradiometer (“USR-40” manufactured by USHIO INC.) Measured. That is, light emitted from the light source passes through the ultraviolet light transmission / visible cut filter, the measurement polarizing plate, and each measurement sample in this order, and the polarized light from each measurement sample enters the spectral irradiometer. It arranged and measured. At that time, Lw (the spectral emission amount of each wavelength measured by superposing the absorption axis at which the absorption of light in the ultraviolet light range of each measurement sample is maximum) and the absorption axis of the measurement polarizing plate become parallel.
  • the visible light range of 400 nm Polarized emission was evaluated at ⁇ 700 nm.
  • measured values are detected between Lw and Ls only for the polarized light emission type polarizing plate. From this, it was found that the polarized light emitting polarizing plate emits light over a wide visible light range of 400 to 700 nm by irradiating ultraviolet light, and that the emitted light has a polarized light emitting function showing polarization. .
  • Liquid crystal cell A digital table clock D011 (clock A No. 7) manufactured by Daiso Japan Co., Ltd. was disassembled, and a liquid crystal cell was taken out. Then, the polarizing plate bonded to the liquid crystal cell was removed, and this was used as a liquid crystal cell used in the following examples.
  • Example 1 A polarized light emitting polarizing plate was bonded to a liquid crystal cell.
  • the polarization light emission type polarizing plate was bonded so that the polarization axis which shows polarization light emission was coaxial with the absorption axis of the polarization plate which was bonded to the liquid crystal cell at the time of purchase.
  • an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Chemical Industries, Ltd.) is disposed.
  • a display device capable of irradiating the liquid crystal cell with polarized light in the ultraviolet light region to the near ultraviolet visible light region from the light source was manufactured.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • the clock display driven by the liquid crystal cell was visible from both the liquid crystal cell side and the polarized light emitting polarizing plate side.
  • Such a display device uses invisible ultraviolet light, and since light emitted from a light source is polarized ultraviolet light, it is suitable for application to a display requiring high security. It can be said.
  • Example 2 A polarized light emitting polarizing plate was bonded onto black paper as a visible light absorbing element, and a liquid crystal cell was further bonded onto the polarized light emitting polarizing plate.
  • the polarization light emission type polarizing plate was bonded so that the polarization axis which shows polarization light emission was coaxial with the absorption axis of the polarization plate which was bonded to the liquid crystal cell at the time of purchase.
  • an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Chemical Industries, Ltd.) is disposed.
  • a display device capable of irradiating a liquid crystal cell was produced by polarizing light in the ultraviolet light region to the near ultraviolet visible light region from a light source.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • polarized ultraviolet light was emitted from the light source from the liquid crystal cell side
  • the clock display driven by the liquid crystal cell was visible with high contrast.
  • Such a display device uses invisible ultraviolet light, and since light emitted from a light source is polarized ultraviolet light, it is suitable for application to a display requiring high security. It can be said.
  • Example 3 A polarized light emitting polarizing plate was bonded to a triacetyl cellulose film (TD-80 manufactured by Fuji Film) having an ultraviolet light absorbing function as an ultraviolet light absorbing film, and a liquid crystal cell was further bonded on the polarized light emitting polarizing plate .
  • the polarization light emission type polarizing plate was bonded so that the polarization axis which shows polarization light emission was coaxial with the absorption axis of the polarization plate which was bonded to the liquid crystal cell at the time of purchase.
  • the polarizing plate O-UVP was bonded to the opposite surface of the liquid crystal cell to which the polarized light emitting polarizing plate was bonded.
  • the absorption axis of the polarizing plate O-UVP was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting type polarizing plate.
  • an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed, and was irradiated from the polarizing plate O-UVP side.
  • PW-UV943H-04 manufactured by Nichia Corporation
  • the clock display driven by the liquid crystal cell is visible from both the polarizing plate O-UVP side and the ultraviolet light absorbing film side, and the visible light transmittance is 85% It was a liquid crystal display having high transparency.
  • the ultraviolet light absorption film is utilized, absorption of ultraviolet light that may be incident from the outside of the display device can be prevented, and adverse effects of ultraviolet light on the eye can also be prevented.
  • such a display device utilizes invisible ultraviolet light, it is also effective for application to displays that require high confidentiality.
  • Example 4 A polarized light emitting polarizing plate was bonded onto black paper as a visible light absorbing element, and a liquid crystal cell was further bonded onto the polarized light emitting polarizing plate.
  • the polarization light emission type polarizing plate was bonded so that the polarization axis which shows polarization light emission was coaxial with the absorption axis of the polarization plate which was bonded to the liquid crystal cell at the time of purchase.
  • the polarizing plate V + UVP was bonded to the opposite surface of the liquid crystal cell to which the polarized light emitting polarizing plate was bonded.
  • the absorption axis of the polarizing plate V + UVP was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting type polarizing plate.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • the liquid crystal cell was irradiated with ultraviolet light from the light source, the clock display driven by the liquid crystal cell was visible with high contrast from the polarizing plate V + UVP side.
  • invisible ultraviolet light since invisible ultraviolet light is used, it is also effective for application to displays that require high confidentiality.
  • a polarized light emitting polarizing plate is bonded on the UV transmitting polarizing plate so that the polarization axis of the polarized light emitting polarizing plate is 90 ° with respect to the absorbing axis of the UV transmitting polarizing plate, and further on the polarized light emitting polarizing plate It was bonded to the liquid crystal cell.
  • the polarization light emission type polarizing plate was bonded so that the polarization axis which shows polarization light emission was coaxial with the absorption axis of the polarization plate which was bonded to the liquid crystal cell at the time of purchase.
  • the polarizing plate V + UVP was bonded to the opposite surface of the liquid crystal cell to which the polarized light emitting polarizing plate was bonded.
  • the absorption axis of the polarizing plate V + UVP was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting type polarizing plate.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • this display device is a display device capable of controlling the display of visible light as well as controlling the transmission and non-transmission of ultraviolet light.
  • Example 6 A polarized light emitting polarizing plate is pasted on the UV transmitting polarizing plate so that the polarization axis of the polarized light emitting polarizing plate is 90 ° to the absorbing axis of the UV transmitting polarizing plate, and Furthermore, the liquid crystal cell for ultraviolet light and the liquid crystal cell for visible light were bonded. In addition, the polarization light emission type polarizing plate was bonded so that the polarization axis which shows polarization light emission was coaxial with the absorption axis of the polarization plate which was bonded to the liquid crystal cell at the time of purchase.
  • the polarizing plate V + UVP was bonded to the opposite surface of the liquid crystal cell to which the polarized light emitting polarizing plate was bonded.
  • the absorption axis of the polarizing plate V + UVP was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting type polarizing plate.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • the clock display driven by the liquid crystal cell was visible not only from the polarizing plate V + UVP side but also from the UV transmitting polarizing plate.
  • transmission and non-transmission of light in the ultraviolet light region were confirmed with a spectrophotometer U-4100, it was confirmed that transmission / non-transmission of ultraviolet light could be controlled by driving of the liquid crystal cell.
  • visible light was irradiated using the common white LED from the polarizing plate V + UVP side which can be visually recognized separately, it has confirmed that the clock display at the time of purchase was able to be displayed.
  • this display device having a double cell structure displays the visible light independently of the control of transmission / non-transmission of ultraviolet light. It turned out that control is possible.
  • a polarized light emitting polarizing plate is pasted on the UV transmitting polarizing plate so that the polarization axis of the polarized light emitting polarizing plate is 90 ° to the absorbing axis of the UV transmitting polarizing plate, and the liquid crystal cell is further polarized light emitting type It bonded on the opposite side of the surface where the polarizing plate is bonded.
  • the polarized light emitting type polarizing plate is pasted so that the polarization axis showing polarized light emission is coaxial with the absorption axis of the polarizing plate which has been bonded to the liquid crystal cell at the time of purchase.
  • the absorption axis of the plate was arranged at 90 ° to the polarization axis of the polarized light emitting polarizing plate. Further, the polarizing plate V + UVP was bonded to the opposite surface of the liquid crystal cell to which the UV transmitting polarizing plate was bonded. At that time, the absorption axis of the polarizing plate V + UVP was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting type polarizing plate.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • the clock display was visible from the polarizing plate V + UVP side by the light emission that the liquid crystal cell was driven.
  • the clock display is visually recognized in a color different from that at the time of ultraviolet light irradiation from the black light It was confirmed to be visible with high contrast.
  • the polarized light emitting polarizing plate emits light and the clock display can also be viewed, a liquid crystal display having a wide viewing angle where the display surface can be viewed based on the light emission can be obtained. was confirmed.
  • Example 8 A polarized light emitting polarizing plate is pasted on a UV nontransparent polarizing plate so that the polarization axis of the polarized light emitting polarizing plate is 90 ° to the absorption axis of the UV nontransparent polarizing plate, and the liquid crystal cell is further polarized It was bonded on the opposite side of the surface to which the light emitting polarizing plate is bonded.
  • the polarized light emitting type polarizing plate is pasted so that the polarizing axis showing polarized light emission is coaxial with the absorption axis of the polarizing plate which has been bonded to the liquid crystal cell at the time of purchase.
  • the transmission polarizing plate was disposed so that the absorption axis of the transmission polarizing plate was 90 ° with respect to the polarization axis of the polarization light emitting polarizing plate. Further, the polarizing plate V + UVP was bonded to the opposite surface of the liquid crystal cell to which the polarized light emitting polarizing plate was bonded. At that time, the absorption axis of the polarizing plate V + UVP was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting type polarizing plate.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated.
  • the obtained display device has the configuration of the display device shown in FIG. It was found that when the polarized light emitting polarizing plate is irradiated with ultraviolet light from the light source, the polarized light emitting polarizing plate emits polarized light, so that the polarized light emitting polarizing plate functions as a backlight with high efficiency because it emits polarized light .
  • the clock display driven by the liquid crystal cell was visible with high luminance from the polarizing plate V + UVP side.
  • transmission and non-transmission of light in the ultraviolet light region were confirmed with a spectrophotometer U-4100, it was confirmed that transmission / non-transmission of ultraviolet light could be controlled by driving of the liquid crystal.
  • visible light was irradiated using a white LED light from the side of the polarized light emitting polarizing plate, it was confirmed that the clock display was visible similarly to a liquid crystal display having a general backlight. From this, it can be seen that this display device displays independently and can be viewed by light in the visible light range and light in the ultraviolet light range.
  • Example 9 A liquid crystal cell for ultraviolet light was bonded onto the polarizing plate O-UVP for the purpose of phase control with ultraviolet light (mainly for 375 nm).
  • the polarizing plate O-UVP was bonded such that the absorption axis of the polarizing plate O-UVP was coaxial with the absorption axis of the polarizing plate that was bonded to the liquid crystal cell at the time of purchase.
  • a polarized light emitting type polarizing plate and a UV transmitting polarizing plate were further bonded in this order on the liquid crystal cell for ultraviolet light.
  • the polarizing light emitting polarizing plate was bonded such that the polarizing axis of the polarizing light emitting polarizing plate was 90 ° with respect to the absorption axis of the UV transmitting polarizing plate. Furthermore, a liquid crystal cell for visible light for the purpose of controlling light in the visible range was bonded onto the UV transmission polarizing plate, and a UV non-transmissive polarizing plate was bonded onto the liquid crystal cell for visible light. The absorption axis of the UV non-transmissive polarizing plate was pasted so as to be 90 ° with respect to the polarization axis of the polarized light emitting polarizing plate.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated.
  • the obtained display device is a light emitting display, and has the configuration of the display device shown in FIG.
  • the clock display driven by the liquid crystal cell can be viewed not only from the UV non-transmissive polarizing plate side but also from the polarizing plate O-UVP side.
  • the clock display is visually recognized in a color different from that when irradiating the ultraviolet light from the black light, and the image is also visually recognized with high contrast It confirmed that it was possible.
  • a liquid crystal display capable of providing an image different from an image displayed by irradiating ultraviolet light and an image displayed by irradiating visible light can be obtained.
  • the clock display can be viewed, and clock display independent of each other was visible.
  • Example 10 The polarized light emitting type polarizing plate was bonded to the liquid crystal cell such that the absorption axis thereof was coaxial with the absorption axis of the polarizing plate which was bonded to the liquid crystal cell at the time of purchase.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated. In this state, even if the display device is irradiated with ultraviolet light, the display image on the liquid crystal cell can not be viewed only because the polarized light emitting type polarizing plate is bright.
  • two UV non-transmissive polarizing plates were respectively disposed as stereoscopic display control members in a positional relationship in which the polarization axes are orthogonal to each other in front of the right eye and the left eye.
  • either the absorption axis of the UV non-transmissive polarizing plate in front of the right eye or the left eye is arranged to be coaxial with the absorption axis of the polarizing plate bonded to the liquid crystal cell at the time of purchase, The other was placed one eye perpendicular to it.
  • the display device obtained in this manner has the configuration of the display device shown in FIG. 51, is capable of displaying different from the right eye and the left eye independently, and has generated parallax.
  • this display device makes it possible to view stereoscopic display by binocular parallax.
  • invisible ultraviolet light is used and can be viewed only when two UV non-transmissive polarizing plates are provided in front of the eye as a stereoscopic display control means, it is effective as a stereoscopic image display device with high confidentiality.
  • Example 11 A plurality of polarized-light emitting polarizing plates were alternately bonded on black paper so that their polarization axes were orthogonal (so that polarized light could be emitted in two directions).
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device having a display unit using ultraviolet light from the light source was manufactured. In this state, even if the display device is irradiated with ultraviolet light, stereoscopic vision can not be recognized only by brightening the polarization light emitting polarizing plate.
  • two UV non-transmissive polarizing plates are respectively disposed as a stereoscopic display control member in a positional relationship in which the polarization axes are orthogonal to each other in front of the right eye and the left eye.
  • the absorption axes of the UV non-transmissive polarizing plates in front of the right eye or the left eye were arranged such that adjacent polarized light emitting type polarizing plates were orthogonal to each other.
  • the display device obtained in this manner has the configuration of the display device shown in FIG. 48, and is capable of displaying different from the right eye and the left eye independently, and parallax has occurred.
  • this display device enables three-dimensional display to be visible due to the binocular disparity between the right eye and the left eye.
  • invisible ultraviolet light is used and can be viewed only when two polarizing plates are provided in front of the eye as a stereoscopic display control means, it is effective as a stereoscopic display with high confidentiality.
  • Example 12 A plurality of polarized-light emitting polarizing plates were alternately bonded on black paper so that their polarization axes were orthogonal (so that polarized light could be emitted in two directions). Furthermore, on two polarization light emission type polarizing plates, a retardation plate having a retardation value of 270 nm was partially disposed as a retardation control member. An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating ultraviolet light from the light source was fabricated.
  • PW-UV943H-04 manufactured by Nichia Corporation
  • a UV non-transmissive polarizing plate was disposed in front of the eyes as a polarization control member.
  • the display device obtained in this manner has the configuration of the display device shown in FIG. 60, and by providing a UV non-transmissive polarizing plate as a polarization control member in front of the eye, the orthogonal arrangement of polarized light emitting polarizing plates and It has been found that visual observation of polarized light whose phase is controlled by the retardation plate becomes possible.
  • the retardation plate when the retardation plate is disposed so that the slow axis of the retardation plate is coaxial (0 °) with the absorption axis of the polarization light-emitting polarizing plate, polarized light emission equivalent to the state without the retardation plate is obtained. It has been found that it is possible, on the other hand, to tilt the slow axis of the retarder by 45 [deg.] Allowing the viewing of differently polarized light emissions.
  • the display device obtained in this manner utilizes invisible ultraviolet light, and only when the polarization control member is provided in front of the eye, desired polarized light can not be viewed. Furthermore, when a retardation plate is provided, a display device having a polarization switching function capable of visually recognizing different polarized light emission can be obtained, and therefore, it is effective as a display device with high security.
  • Example 13 A polarized light emitting polarizing plate was laminated on black paper. Furthermore, the liquid crystal cell is pasted on the polarization light emitting type polarizing plate so that the absorption axis of the polarizing plate which is attached to the liquid crystal cell at the time of purchase and the light emitting axis of the polarization light emitting polarizing plate are coaxial. Furthermore, on the liquid crystal cell, a retardation plate having a retardation value of 270 nm was partially disposed as a retardation control member. At this time, the retardation plate was placed so that its slow axis was 45 ° with the absorption axis of the polarizing plate that had been bonded to the liquid crystal cell at the time of purchase.
  • An ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04" manufactured by Nichia Corporation) was disposed as a light source, and a display device capable of irradiating the liquid crystal cell with ultraviolet light from the light source was fabricated. Even when the display device is irradiated with ultraviolet light in this state, only the polarized light emitting type polarizing plate is bright, and the display image can not be viewed. Therefore, a UV non-transmissive polarizing plate was disposed in front of the eyes as a polarization control member.
  • the UV non-transmissive polarizing plate was designed such that the absorption axis thereof was coaxial with the absorption axis of the polarizing plate bonded to the liquid crystal cell at the time of purchase.
  • the display device obtained in this manner has the configuration of the display device shown in FIG. 64.
  • the retardation plate when the retardation plate is disposed so that the slow axis of the retardation plate is coaxial (0 °) with the absorption axis of the polarization light-emitting polarizing plate, display equivalent to that without the retardation plate is possible. It turned out that it was.
  • the display device obtained in this manner utilizes invisible ultraviolet light and can not only recognize the displayed image only when the polarization control member is provided in front of the eye, but also provides different displays when the retardation plate is provided. This is effective as a highly confidential display device because it is possible to obtain a display device having a polarization switching function that is capable of
  • Example 3 a polarizing plate that was bonded at the time of purchase using Digital Table Clock D011 (clock A No. 7) manufactured by Daiso Japan Co., Ltd. without using a polarized light emitting polarizing plate and polarizing plate O-UVP
  • a general polarizing plate (SKN-18243P manufactured by Polatechno Co., Ltd.) was bonded so that the absorption axis was the same axis.
  • the obtained display was irradiated with an ultraviolet LED 375 nm hand light type black light ("PW-UV943H-04" manufactured by Nichia Corporation). Although the clock display was slightly visible, there was no light emission by ultraviolet irradiation, the contrast was low, and the brightness was not sufficient.
  • Example 3 in the liquid crystal display device (left side) of Example 3, although light emission (clock display) was confirmed by the irradiation of ultraviolet light, a comparison using a general polarizing plate was made. In the liquid crystal display device (right side) of Example 1, no light emission (clock display) was confirmed even when irradiated with ultraviolet light. Further, as shown in FIG. 71, in the liquid crystal display device of Example 3, even when the finger is placed on the back of the display, the clock display can be viewed while maintaining the transparency so that the finger can be viewed. there were. From this, it was found that the liquid crystal display device (left side) of Example 3 had very high transparency.
  • Comparative Example 2 In the liquid crystal display device in Example 3, a conventional liquid crystal display device was produced using a general polarizing plate (SKN-18243P manufactured by Polatechno Co., Ltd.) instead of the polarized light emitting type polarizing plate. However, since only one polarizing plate for visible region is used in this liquid crystal display device, the characters can not be visually recognized regardless of the irradiation of ultraviolet light and visible light.
  • a general polarizing plate SSN-18243P manufactured by Polatechno Co., Ltd.
  • Example 13 As a light source, an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04” manufactured by Nichia Chemical Industry Co., Ltd.) is used and a light diffusion plate (diffuse adhesion 83D manufactured by Polatechno Co., Ltd.) in order from the light source, a polarizing plate O-UVP, A liquid crystal cell and a white polarized light emitting polarizing plate were provided in this order.
  • White Polarizing Plate A blue pigment (Acid Blue 9), a green pigment (Acid Green 16), and a red pigment (Acid Red 114) on the light-emitting polarizing plate are independently used as color filters for each display segment of the liquid crystal cell electrically driven.
  • a colored light transmission filter having a blue color filter, a green color filter, and a red color filter.
  • the polarizing plate O-UVP is bonded to an axis at the same angle as the absorption axis of the polarizing plate that has been bonded to the liquid crystal cell at the time of purchase, and the absorption axis of the white polarized light emitting polarizing plate absorbs the polarizing plate O-UVP It was bonded through a liquid crystal cell so that the axis was 90 °.
  • the display device obtained in this way has the configuration of the display device shown in FIG. 66, and color display is possible for each display segment.
  • the obtained display device is a self-emission liquid crystal display device capable of converting white light emitted from the white polarized light emission type polarizing plate into blue, green and red. This means that it can be provided as a display device having high color rendering. Furthermore, although the obtained self-luminous liquid crystal display was a liquid crystal display, it had wide viewing angles. Therefore, it is effective as a liquid crystal display device having wide viewing angle, even if there is no bonding of a retardation plate and a complicated liquid crystal cell structure. Further, as in the conventional liquid crystal display device, since two polarizing plates having a visibility correction transmittance of 30 to 45% are not used, a display having higher transmittance and higher color rendering than in the prior art It can provide the device.
  • Example 14 As a light source, an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04” manufactured by Nichia Chemical Industry Co., Ltd.), a light diffusion plate (diffuse adhesion 83D manufactured by Polatechno Co., Ltd.) in order from the light source, a white polarized light emitting polarizing plate , A liquid crystal cell, and a UV non-transmissive polarizing plate were provided in this order. A blue pigment (Acid Blue 9), a green pigment (Acid Green 16), and a red pigment (Acid Red 114) on the UV non-transmissive polarizing plate are used as color filters independently for each display segment of the liquid crystal cell electrically driven.
  • PW-UV943H-04 manufactured by Nichia Chemical Industry Co., Ltd.
  • a light diffusion plate diffuse adhesion 83D manufactured by Polatechno Co., Ltd.
  • the colored light transmission filter which has a blue color filter, a green color filter, and a red color filter.
  • the white polarized light emitting type polarizing plate is bonded to an axis of the same angle as the absorption axis of the polarizing plate which has been bonded to the liquid crystal cell at the time of purchase, and the absorbing axis of the UV non-transmissive type polarizing plate is a white polarized light emitting type polarizing plate It bonded through a liquid crystal cell so that it might become 90 degrees with the absorption axis of.
  • the display device obtained in this manner has the configuration of the display device shown in FIG. 68, and color display is possible for each display segment.
  • the obtained display device is a self-emission liquid crystal display device capable of converting the white light emitted from the white polarized light emission type polarizing plate into blue, green and red, a display device having high color rendering property can be obtained. Further, since two polarizing plates having a transmittance of 30% to 45% are not used in the visibility correction transmittance, it is possible to provide a display having a higher transmittance and a higher color rendering than in the prior art.
  • the self-luminous liquid crystal display device obtained in this example had higher contrast than the liquid crystal display device obtained in Example 1. Furthermore, although the obtained self-luminous liquid crystal display was a liquid crystal display, it had wide viewing angles. Therefore, it is effective as a liquid crystal display device having wide viewing angle, even if there is no bonding of a retardation plate and a complicated liquid crystal cell structure.
  • Example 15 As a light source, an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04” manufactured by Nichia Chemical Industry Co., Ltd.) is used, and light diffusion plates (diffusion adhesion 83D manufactured by Polatechno Co., Ltd.), polarizing plates O-UVP, A liquid crystal cell and a blue polarized light emitting polarizing plate were provided in this order.
  • PW-UV943H-04 manufactured by Nichia Chemical Industry Co., Ltd.
  • light diffusion plates diiffusion adhesion 83D manufactured by Polatechno Co., Ltd.
  • polarizing plates O-UVP A liquid crystal cell
  • a blue polarized light emitting polarizing plate were provided in this order.
  • Basic Yellow 51 as a pigment capable of wavelength conversion emission of blue to green
  • Rhodamine 6G as a pigment capable of wavelength conversion emission of blue to red
  • a colored light transmission filter having a green color filter and a red color filter was provided independently.
  • the polarizing plate O-UVP is bonded to an axis at the same angle as the absorption axis of the polarizing plate that has been bonded to the liquid crystal cell at the time of purchase, and the absorption axis of the blue polarized light emitting polarizing plate is absorbed by the polarizing plate O-UVP It was bonded through a liquid crystal cell so that the axis was 90 °.
  • the display device obtained in this way has the configuration of the display device shown in FIG. 67, and can perform color display for each segment. Therefore, the obtained display device has red and green independently in the portion transmitting blue light emitted from the blue polarized light emitting polarizing plate, the portion converting blue to green, and the portion capable of converting blue to red.
  • the self-luminous liquid crystal display device obtained in this example had high contrast and had higher luminance than the liquid crystal display device obtained in Example 14. Furthermore, although the obtained self-luminous liquid crystal display was a liquid crystal display, it had wide viewing angles. Therefore, it is effective as a liquid crystal display device having wide viewing angle, even if there is no bonding of a retardation plate and a complicated liquid crystal cell structure. In addition, the visibility correction transmittance as a display device was 76%, and the transparency was dramatically higher than that of a general liquid crystal display device.
  • Example 16 As a light source, an ultraviolet LED 375 nm hand light type black light (“PW-UV943H-04” manufactured by Nichia Chemical Industry Co., Ltd.), a light diffusion plate (diffuse adhesion 83D manufactured by Polatechno Co., Ltd.) in order from the light source, blue polarized light emitting polarizing plate , A liquid crystal cell, and a polarizing plate for 400 to 480 nm were provided in this order.
  • PW-UV943H-04 manufactured by Nichia Chemical Industry Co., Ltd.
  • a light diffusion plate diffuse adhesion 83D manufactured by Polatechno Co., Ltd.
  • CSH-530-04 manufactured by Nippon Quantum Design Co., Ltd.
  • CSH-655-04 manufactured by Nippon Quantum Design Co., Ltd.
  • a colored light transmission filter was provided.
  • the blue polarized light emitting type polarizing plate is bonded to an axis of the same angle as the absorption axis of the polarizing plate which has been bonded to the liquid crystal cell at the time of purchase, and the absorbing axis of the 400 to 480 nm polarizing plate is a blue polarized light emitting type polarizing plate It bonded through a liquid crystal cell so that it might become 90 degrees with the absorption axis of.
  • the display device obtained in this manner has the configuration of the display device shown in FIG. 69, and can perform color display for each display segment.
  • the liquid crystal display had high transparency with a visible transmittance of 85%.
  • the obtained display device has red and green independently in the part transmitting blue light emitted from the blue polarized light emitting polarizing plate, the part converting blue to green, and the part convertible from blue to red. It turned out that it is a self-luminous liquid crystal display device which shows blue luminescence. This means that a highly transparent display device is obtained while having high color rendering properties.
  • the self-luminous liquid crystal display device obtained in this example had high contrast, and had higher luminance than the liquid crystal display device obtained in Example 2.
  • the obtained self-luminous liquid crystal display was a liquid crystal display, it had wide viewing angles. Therefore, it is effective as a liquid crystal display device having wide viewing angle, even if there is no bonding of a retardation plate and a complicated liquid crystal cell structure.
  • Comparative Example 3 It irradiated using ultraviolet LED 375 nm hand light type black light ("PW-UV943H-04" by Nichia Chemical Co., Ltd.) in Digital table clock D011 (watch A No. 7) by Daiso Japan. Although the clock display was slightly visible as in Comparative Example 1, the contrast was low and the brightness was not sufficient.
  • the display device including the optical system of the present invention is a self-luminous liquid crystal display device, which has high visibility and is possessed by the conventional liquid crystal display device. It can be seen that a display device having no viewing angle dependency and high transparency can be obtained. Furthermore, since invisible ultraviolet light is used, unlike the conventional display device, it is possible to display using invisible light, and hence a display device with high security (security) It is understood that it can be obtained. In this case, since it has a polarization control function in the ultraviolet light range, transmission / non-transmission of ultraviolet light can be controlled. Moreover, by combining the display using ultraviolet light and the display using visible light, independent display is possible, and thus a display device capable of two unprecedented displays can be obtained. I understand.

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