WO2019172288A1 - 表示装置 - Google Patents

表示装置 Download PDF

Info

Publication number
WO2019172288A1
WO2019172288A1 PCT/JP2019/008721 JP2019008721W WO2019172288A1 WO 2019172288 A1 WO2019172288 A1 WO 2019172288A1 JP 2019008721 W JP2019008721 W JP 2019008721W WO 2019172288 A1 WO2019172288 A1 WO 2019172288A1
Authority
WO
WIPO (PCT)
Prior art keywords
color
pixel
red
specified color
laser light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/008721
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
陽一 浅川
憲 小野田
裕明 雉嶋
小村　真一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Display Inc
Original Assignee
Japan Display Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Display Inc filed Critical Japan Display Inc
Publication of WO2019172288A1 publication Critical patent/WO2019172288A1/ja
Priority to US17/009,959 priority Critical patent/US11194090B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G02F1/133622—Colour sequential illumination
    • 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
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0239—Combinations of electrical or optical elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/30—Picture reproducers using solid-state colour display devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H01S5/0078—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for frequency filtering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4087—Array arrangements, e.g. constituted by discrete laser diodes or laser bar emitting more than one wavelength
    • H01S5/4093—Red, green and blue [RGB] generated directly by laser action or by a combination of laser action with nonlinear frequency conversion

Definitions

  • Embodiments of the present invention relate to a transmissive display device.
  • BT. Standardized in 4K / 8K broadcasting. 2020 is a BT. It covers a wide color gamut that is about 1.7 times that of 709. In order to cover such a wide color gamut, it is necessary to use laser light having higher color purity than LED light in each sub-pixel.
  • red has a wavelength of 630 nm.
  • the laser light that can be efficiently extracted has a wavelength of about 638 nm.
  • the light emission efficiency is greatly reduced as compared with the case of using a semiconductor laser having an output wavelength of about 638 nm.
  • the mainstream configuration proposed so far has been aimed at expanding the color gamut represented by the display device to match the standard.
  • There has been hardly proposed a configuration for narrowing a color gamut that is too wide to match the standard for example, see Patent Document 1 and Patent Document 2).
  • a red semiconductor laser is used as the light source, the color gamut of the display device and the standard match rate are compromised from the viewpoint of power consumption.
  • An object of the present disclosure is to provide a high-quality display device that has an excellent match rate with a specified color gamut.
  • the display device includes a first prescribed color of the first chromaticity coordinate, a second prescribed color of the second chromaticity coordinate, and a third prescribed of the third chromaticity coordinate in the CIExy chromaticity diagram. Displays the color gamut that connects colors.
  • the display device includes a display panel and a lighting device. In the display panel, a plurality of pixels for displaying the color gamut described above are arranged.
  • the illumination device irradiates the display panel with light.
  • the illumination device includes a green semiconductor laser, a blue semiconductor laser, and a red semiconductor laser.
  • the green semiconductor laser emits a laser beam of the second specified color.
  • the blue semiconductor laser emits a laser beam having a third specified color.
  • the red semiconductor laser emits a laser beam having a color having a fourth chromaticity coordinate different from the first specified color.
  • Each pixel displays a color including the first specified color by mixing the laser light of the color of the fourth chromaticity coordinate and the laser light of the second specified color.
  • FIG. 1 is a plan view showing a schematic configuration of a display device common to the embodiments.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of the display device shown in FIG.
  • FIG. 3 is a perspective view illustrating a schematic configuration of the illumination device illustrated in FIG. 1.
  • FIG. 4 is a CIExy chromaticity diagram showing the color gamuts of the first to third specified colors to be displayed on the display device.
  • FIG. 6 is a diagram illustrating the transmission characteristics of the two-color transmission filter included in the display device according to the first embodiment.
  • FIG. 1 is a plan view showing a schematic configuration of a display device common to the embodiments.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of the display device shown in FIG.
  • FIG. 3 is a perspective view
  • FIG. 7 is a plan view showing a two-color transmission filter included in the display device according to the second embodiment.
  • FIG. 8 is a diagram showing the output of each semiconductor laser in the first field of the display device according to the third embodiment.
  • FIG. 9 is a diagram showing the output of each semiconductor laser in the second field of the display device according to the third embodiment.
  • a configuration common to the embodiments will be described with reference to FIGS. 1 to 4.
  • a liquid crystal display device DSP is disclosed as an example of a display device.
  • each embodiment does not preclude the application of the individual technical ideas disclosed in each embodiment to other types of display devices.
  • a display device having a mechanical display cell such as a Micro Electro Mechanical System (MEMS) shutter is assumed.
  • MEMS Micro Electro Mechanical System
  • the display device of the present invention can be used in various electronic devices such as a smartphone, a tablet terminal, a mobile phone terminal, a personal computer, a television receiver, an in-vehicle device, a game device, and a wearable terminal.
  • FIG. 1 is a plan view showing a schematic configuration of a liquid crystal display device DSP.
  • a liquid crystal display device DSP includes a display panel (liquid crystal cell) PNL having a display surface and a back surface, an illumination device (backlight) BL that irradiates light on the back surface of the display panel PNL, and a display panel. And a controller CTR that controls operations of the PNL and the illumination device BL.
  • the display panel PNL displays an image on the display surface by selectively transmitting light incident on the back surface.
  • the display surface of the display panel PNL may be a flat surface or a curved surface. In the following description, viewing from the display surface of the display panel PNL toward the back surface is defined as planar view.
  • the display panel PNL includes a first substrate (array substrate) SUB1, a second substrate (counter substrate) SUB2, a sealing material SE that is an adhesive, and a liquid crystal layer LQ.
  • the liquid crystal layer LQ is an example of an electro-optical layer that is driven by electricity and selectively transmits light.
  • the electro-optical layer may be the above-described MEMS shutter or the like.
  • the second substrate SUB2 faces the first substrate SUB1 in the thickness direction of the display panel PNL.
  • the first substrate SUB1 is formed larger than the second substrate SUB2 and has a mounting area NDat exposed from the second substrate SUB2.
  • a drive circuit board FPC is mounted in the mounting area NDat.
  • the drive circuit board FPC sequentially receives image data for one frame for displaying on the display panel PNL from, for example, a main board of an electronic device on which the liquid crystal display device DSP is mounted.
  • This image data includes information such as the display color of each pixel PX, for example.
  • the drive circuit board FPC is provided with a control module which is an example of a controller CTR.
  • the control module may be provided on the first substrate SUB1 instead of the drive circuit substrate FPC.
  • the seal material SE corresponds to a portion indicated by a diagonal line rising to the right in FIG. 1, and bonds the first substrate SUB1 and the second substrate SUB2.
  • the liquid crystal layer LQ is sandwiched between the first substrate SUB1 and the second substrate SUB2 inside the sealing material SE.
  • the display surface of the display panel PNL includes a display area DA that displays an image and a non-display area (frame area) NDA that surrounds the display area DA.
  • the non-display area NDA includes the above-described mounting area NDAt.
  • a plurality of subpixels SPX are arranged in a matrix.
  • a pixel PX capable of color display can be configured by combining three subpixels SPX (SPXr, SPXg, SPXb) respectively corresponding to red, green, and blue.
  • the first substrate SUB1 includes a plurality of scanning signal lines GL and a plurality of video signal lines SL intersecting the scanning signal lines GL.
  • the aforementioned subpixel SPX corresponds to a region defined by two adjacent scanning signal lines GL and two adjacent video signal lines SL.
  • the first substrate SUB1 includes a scanning driver GD connected to each scanning signal line GL and a video driver SD connected to each video signal line SL.
  • the scanning driver GD and the video driver SD are provided in the non-display area NDA and can be formed in the same process as the switching element SW of the sub-pixel SPX described later. Note that the scanning driver GD and the video driver SD may be provided not on the first substrate SUB1 but on the drive circuit board FPC or in the control module.
  • the first substrate SUB1 includes a switching element SW and a pixel electrode PE in each subpixel SPX.
  • the switching element SW is constituted by, for example, a thin film transistor (TFT), and is electrically connected to the scanning signal line GL, the video signal line SL, and the pixel electrode PE.
  • a common electrode CE extends to face the plurality of subpixels SPX.
  • the common electrode CE may be provided on the first substrate SUB1 or may be provided on the second substrate SUB2.
  • the aforementioned controller CTR controls the scanning driver GD and the video driver SD based on the received image data.
  • the scanning driver GD supplies a scanning signal to each scanning signal line GL
  • the video driver SD supplies a video signal to each video signal line SL.
  • the scanning signal is supplied to the scanning signal line GL corresponding to the switching element SW
  • the video signal line SL corresponding to the switching element SW and the pixel electrode PE are electrically connected, and the video signal of the video signal line SL is changed.
  • Supplied to the pixel electrode PE Supplied to the pixel electrode PE.
  • the pixel electrode PE forms an electric field with the common electrode CE to change the alignment of the liquid crystal molecules in the liquid crystal layer LQ.
  • the storage capacitor CS is formed between the common electrode CE and the pixel electrode PE, for example.
  • FIG. 2 is a cross-sectional view of the liquid crystal display device DSP in the display area DA.
  • the first substrate SUB1 includes the first transparent substrate 10 in addition to the above-described scanning signal line GL, video signal line SL, scanning driver GD, video driver SD, switching element SW, pixel electrode PE, common electrode CE, A first insulating layer 11, a second insulating layer 12, and a first alignment film 13 are provided.
  • the first transparent substrate 10 is formed of a light-transmitting glass substrate or resin substrate, and the first surface 10A facing the second substrate SUB2 and the second surface opposite to the first surface 10A. 10B.
  • the switching element SW is provided on the first surface 10 ⁇ / b> A of the first transparent substrate 10 and is covered with the first insulating layer 11.
  • the scanning signal line GL, the video signal line SL, the switching element SW, and the like are illustrated in a simplified manner for convenience of description of the embodiment.
  • the first insulating layer 11 includes a plurality of layers, and the switching element SW includes a semiconductor layer and various electrodes formed in these layers.
  • the common electrode CE is formed on the first insulating layer 11.
  • the common electrode CE is covered with the second insulating layer 12.
  • the pixel electrode PE is formed on the second insulating layer 12 and faces the common electrode CE.
  • Each pixel electrode PE is electrically connected to the switching element SW of the sub-pixel SPX through the contact hole CH.
  • the pixel electrode PE and the common electrode CE are formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).
  • the first alignment film 13 covers the pixel electrode PE and is in contact with the liquid crystal layer LQ.
  • the first alignment film 13 is subjected to an alignment process such as a rubbing process or an optical alignment process.
  • the second substrate SUB2 includes a second transparent substrate 20 such as a glass substrate or a resin substrate having optical transparency.
  • the second transparent base material 20 has a third surface 20A facing the first substrate SUB1 and a fourth surface 20B opposite to the third surface 20A.
  • the second substrate SUB2 includes a light shielding layer (black matrix) 21, a color filter layer 22, an overcoat layer 23, and a second alignment film 24.
  • the light shielding layer 21 is formed on the third surface 20A of the second transparent substrate 20.
  • the color filter layer 22 covers the light shielding layer 21 and the second transparent substrate 20.
  • the light shielding layer 21 is formed in the non-display area NDA in plan view. Further, the light shielding layer 21 is formed immediately above the scanning signal line GL and the video signal line SL in the display area DA, and partitions the sub-pixel SPX.
  • the color filter layer 22 faces the pixel electrode PE, and a part thereof overlaps the light shielding layer 21.
  • the color filter layer 22 may be formed on the first substrate SUB1 instead of the second substrate SUB2.
  • the color filter layer 22 includes first to third filter layers 22r, 22g, and 22b disposed corresponding to the red pixel, the green pixel, and the blue pixel SPXr, SPXg, and SPXb.
  • the overcoat layer 23 covers the color filter layer 22.
  • the second alignment film 24 covers the overcoat layer 23 and is in contact with the liquid crystal layer LQ.
  • the first polarizing plate PL1 is disposed on the second surface 10B of the first transparent substrate 10, and the second polarizing plate PL2 is disposed on the fourth surface 20B of the second transparent substrate 20. Note that the first polarizing plate may be omitted when the illumination device emits polarized laser light. When a MEMS shutter is used for the electro-optic layer instead of the liquid crystal layer LQ, the first and second polarizing plates PL1 and PL2 may be omitted.
  • FIG. 3 is a perspective view showing an example of the illumination device BL shown in FIG.
  • the illumination device BL is configured as an edge type, and includes a light source module 31 that emits light, and a light guide plate 32 that guides light from the light source module 31 to the display panel PNL.
  • the light guide plate 32 may be omitted. In that case, not the light guide plate 32 but the light source module 31 faces the back surface of the display panel PNL.
  • the light guide plate 32 has an emission surface 32A facing the back surface of the display panel PNL in the display area DA, a reflection surface 32B opposite to the emission surface 32A, and an end surface 32C connecting the emission surface 32A and the reflection surface 32B. doing.
  • the end surface 32C includes an incident surface 32D.
  • the light source module 31 includes a plurality of light sources 33 arranged along the incident surface 32 ⁇ / b> D of the light guide plate 32.
  • An optical system 34 such as a collimator may be disposed between each light source 33 and the incident surface 32D.
  • the plurality of light sources 33 include a red semiconductor laser LDr, a green semiconductor laser LDg, and a blue semiconductor laser LDb.
  • each light source 33 is composed of any one of a red semiconductor laser LDr, a green semiconductor laser LDg, and a blue semiconductor laser LDb, which are single wavelength light sources.
  • Each light source 33 may be an assembled white semiconductor laser including a red semiconductor laser LDr, a green semiconductor laser LDg, and a blue semiconductor laser LDb.
  • the white semiconductor laser emits a mixed color laser beam in which the laser beams emitted from the respective semiconductor lasers LDr, LDg, and LDb are bundled by a dichroic mirror or the like.
  • the red semiconductor laser LDr is made of, for example, an aluminum gallium indium phosphide (AlGaInP) -based semiconductor material and emits laser light having a center wavelength of about 538 nm.
  • the green semiconductor laser LDg is made of, for example, a gallium indium nitride (InGaN) -based or zinc selenide (ZnSe) -based semiconductor material, and emits laser light having a center wavelength of about 532 nm.
  • the blue semiconductor laser is made of, for example, a semiconductor material of gallium indium nitride (InGaN) or zinc selenide (ZnSe), and emits laser light having a center wavelength of about 467 nm.
  • Each semiconductor laser has a slight individual difference, and even with the same color semiconductor laser, the center wavelength of the laser light may differ by about 1 nm.
  • FIG. 4 is a CIExy chromaticity diagram (CIE1931) showing a color gamut defined by a standard or the like to be displayed on the liquid crystal display device DSP.
  • the liquid crystal display device DSP displays the triangular color gamut connecting the first to third chromaticity coordinates (x1, y1), (x2, y2), (x3, y3) to the inside of the color gamut.
  • the semiconductor laser LD red semiconductor laser LDr
  • the semiconductor laser LD red semiconductor laser LDr
  • the colors y3) are referred to as first to third specified colors, respectively.
  • An example of the first specified color is BT.
  • An example of the second specified color is BT.
  • An example of the third specified color is BT.
  • the aforementioned green semiconductor laser LDg emits a laser beam of the second specified color (wavelength 532 nm).
  • the blue semiconductor laser LDb emits laser light of the third specified color (wavelength 467 nm).
  • the red semiconductor laser LDr emits laser light having a wavelength of 638 nm different from the first specified color (wavelength 630 nm). This is the wavelength of the light source having the highest luminous efficiency among the light sources in general distribution.
  • a light source having a wavelength of 637 nm or 639 nm may be used.
  • the fourth chromaticity coordinate (x4, y4) having a wavelength of 638 nm is a triangular shape connecting the first to third chromaticity coordinates (x1, y1), (x2, y2), (x3, y3). Located on the outside.
  • the first chromaticity coordinates (x1, y1) are substantially located on a line segment connecting the fourth and second chromaticity coordinates (x2, y2), (x4, y4).
  • the color (x1, y1) on the line segment connecting the two points (x2, y2), (x4, y4) on the xy chromaticity diagram is reproduced by the color mixture of the two points (x2, y2), (x4, y4). it can.
  • the first filter layer 22r provided in the red pixel SPXr transmits a red laser beam and transmits a part of the green laser beam and absorbs the remainder. It is configured as.
  • the first filter layer 22r is, for example, an orange-colored film colored in orange, and red laser light (single wavelength of the color of the fourth chromaticity coordinate (x4, y4)) emitted from the red semiconductor laser LDr. Through efficiently. Further, the first filter layer 22r transmits green laser light (single wavelength of the color of the second chromaticity coordinate (x2, y2)) emitted from the green semiconductor laser LDg with a predetermined transmittance.
  • the first filter layer 22r transmits green laser light having an output of 1/250 of red laser light.
  • the red pixel SPXr can display red of the first specified color by using the back illumination different from the first specified color. Moreover, since a highly efficient red semiconductor laser LDr can be used, power consumption can be saved.
  • a second embodiment will be described with reference to FIG.
  • the second embodiment is a modification of the first embodiment, and the configuration of the two-color transmission filter is different.
  • the first filter layer 22r provided in the red pixel SPXr has a red region that efficiently transmits red laser light and a green region that efficiently transmits green laser light. .
  • the regions surrounded by the two-dot chain line in FIG. 7 are the subpixels SPXr, SPXg, and SPXb.
  • a portion of the color filter layer 22 that overlaps the red pixel SPXr is the first filter layer 22r.
  • the portion of the color filter layer 22 that overlaps with the green pixel SPXg is the second filter layer 22g
  • the portion that overlaps with the blue pixel SPXb is the third filter layer 22b.
  • a red colored film that efficiently transmits the red laser beam is formed in the region indicated by the diagonally upward slant lines in FIG.
  • a green colored film that efficiently transmits green laser light is formed in a region indicated by a diagonally downward slanting line in FIG.
  • the green colored film is integrally formed across the first and second filter layers 22r and 22g adjacent to each other.
  • a green colored film may be formed on each of the first filter layer 22r and the second filter layer 22g.
  • the first filter layer 22r includes a red region in which a red colored film is formed and a green region in which a green colored film is formed.
  • the first filter layer 22r in which two different colored films are formed is an example of a two-color transmission filter.
  • the area ratio between the red region and the green region is 1 / 1.3, for example.
  • the red pixel SPXr can display red of the first specified color by using the back illumination different from the first specified color.
  • the red pixel SPXr displays the first specified color, so that the pixel PX displays a color including the first specified color.
  • the red pixel SPXr displays light of a color having a fourth chromaticity coordinate different from the first specified color.
  • the pixel PX displays a color including the first specified color by mixing the color displayed by the red pixel SPXr and the color displayed by the green pixel SPXg.
  • the red, green, and blue semiconductor lasers LDr, LDg, and LDb are turned on at high speed in a time-sharing manner, and the images are switched at a high speed in synchronism with this to mix each color temporally.
  • one frame is divided into the first half and the second half, and in the first field of the first half, the first specified color with an output of 100% and the third specified color with an output of 50% are displayed.
  • the second field in the latter half a second specified color with an output of 100% and a third specified color with an output of 50% are displayed.
  • the first to third specified colors are mixed and an afterimage with an output of 50% is visually recognized.
  • a yellow colored film that efficiently transmits red laser light and green laser light and absorbs blue laser light is formed on the first and second filter layers 22r and 22g of the red pixel SPXr and the green pixel SPXg.
  • a blue colored film that absorbs red laser light and green laser light and efficiently transmits blue laser light is formed on the blue pixel SPXb.
  • FIG. 8 and 9 are diagrams showing the output of each semiconductor laser in the first and second fields.
  • two lamps of the green semiconductor laser LDg and the blue semiconductor laser LDb are turned on.
  • the green semiconductor laser LDg is turned on in addition to the red semiconductor laser LDr and the blue semiconductor laser LDb.
  • the output of the green semiconductor laser LDg in the first field is 1/250 of the output of the red semiconductor laser LDr, for example.
  • the green laser light is slightly turned on in addition to the red laser light and the blue laser in the field displaying the first specified color and the third specified color.
  • the controller CTR that receives image data converts the video signal to match the color gamut that is displayed on the pixel PX with the color gamut connecting the first to third specified colors. For example, when receiving image data that causes the red pixel SPXr to display a color including the first specified color, the controller CTR changes the color of the fourth chromaticity coordinate (x4, y4) different from the first specified color to red. The image is displayed on the pixel SPXr.
  • the controller CTR converts the video signal so that the luminance (gradation) of the green pixel SPXg displaying the second specified color is brighter than the original video signal.
  • the green laser beam of the green pixel SPXg is used for displaying the second specified color, and further defines the color of the fourth chromaticity coordinate (x4, y4) of the red pixel SPXr that is different from the first specified color. Used to match colors.
  • the green component in the converted video signal is, for example, the sum of the luminance of the green pixel SPXg displayed in the original video signal and the luminance of the green laser light added according to the luminance of the red pixel SPXr.
  • the luminance of the green laser light added according to the luminance of the red pixel SPXr is, for example, 1/250 in terms of output ratio.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Semiconductor Lasers (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Optical Filters (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
PCT/JP2019/008721 2018-03-08 2019-03-05 表示装置 Ceased WO2019172288A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/009,959 US11194090B2 (en) 2018-03-08 2020-09-02 Display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018042229A JP6713498B2 (ja) 2018-03-08 2018-03-08 表示装置
JP2018-042229 2018-03-08

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/009,959 Continuation US11194090B2 (en) 2018-03-08 2020-09-02 Display device

Publications (1)

Publication Number Publication Date
WO2019172288A1 true WO2019172288A1 (ja) 2019-09-12

Family

ID=67847243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/008721 Ceased WO2019172288A1 (ja) 2018-03-08 2019-03-05 表示装置

Country Status (3)

Country Link
US (1) US11194090B2 (enExample)
JP (1) JP6713498B2 (enExample)
WO (1) WO2019172288A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113767327A (zh) * 2019-04-30 2021-12-07 詹麦克斯咨询有限公司 用于电视或移动电话的显示屏的背光设备
JP2021144115A (ja) * 2020-03-11 2021-09-24 シャープ株式会社 液晶表示パネルおよびその製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016035572A (ja) * 2014-07-31 2016-03-17 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． 液晶表示装置
JP2017054088A (ja) * 2015-09-11 2017-03-16 パナソニック液晶ディスプレイ株式会社 液晶表示装置
JP2017090799A (ja) * 2015-11-16 2017-05-25 株式会社ジャパンディスプレイ 表示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4428359B2 (ja) * 2005-10-18 2010-03-10 セイコーエプソン株式会社 表示装置
JP6582237B2 (ja) 2016-01-12 2019-10-02 パナソニックＩｐマネジメント株式会社 画像表示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016035572A (ja) * 2014-07-31 2016-03-17 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． 液晶表示装置
JP2017054088A (ja) * 2015-09-11 2017-03-16 パナソニック液晶ディスプレイ株式会社 液晶表示装置
JP2017090799A (ja) * 2015-11-16 2017-05-25 株式会社ジャパンディスプレイ 表示装置

Also Published As

Publication number Publication date
JP6713498B2 (ja) 2020-06-24
JP2019158965A (ja) 2019-09-19
US11194090B2 (en) 2021-12-07
US20200400871A1 (en) 2020-12-24

Similar Documents

Publication Publication Date Title
US20190171009A1 (en) Head up display device
US10067343B2 (en) Liquid crystal display device for head-up display device, and head-up display device
JP4539760B2 (ja) 電子機器
CN102722051B (zh) 显示装置、滤色器及电子设备
US8939597B2 (en) Illumination device, display device, and television reception device
CN102759817B (zh) 显示装置
US7764254B2 (en) Electro-optical device and electronic apparatus
US7697089B2 (en) Liquid crystal display apparatus
US20190245006A1 (en) Micro led display device
US11194090B2 (en) Display device
CN102998835A (zh) 液晶显示装置
CN100405195C (zh) 液晶显示装置以及电子设备
US8770788B2 (en) Backlight unit, display device, and electronic device
CN101226293B (zh) 显示装置
US20240118569A1 (en) Display device
JP2007287385A (ja) 照明装置、液晶装置、及び電子機器
US20150009450A1 (en) Double layer liquid crystal (lc) fabry-perot (fp) filter display device
JP2017073412A (ja) 表示装置及び光源装置
KR20090054840A (ko) 백라이트 및 이를 구비한 액정표시소자
JP2015138217A (ja) 電気光学装置および電子機器
US20250110366A1 (en) Display device
KR101831238B1 (ko) 액정표시장치
JP2007287789A (ja) 照明装置、液晶装置及び電子機器
US20120188758A1 (en) Lighting device and display device
KR100669417B1 (ko) 저온 특성을 개선한 액정표시장치

Legal Events

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

Ref document number: 19764292

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19764292

Country of ref document: EP

Kind code of ref document: A1