WO2016149976A1 - 光纤背光模组及液晶显示器 - Google Patents

光纤背光模组及液晶显示器 Download PDF

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Publication number
WO2016149976A1
WO2016149976A1 PCT/CN2015/077154 CN2015077154W WO2016149976A1 WO 2016149976 A1 WO2016149976 A1 WO 2016149976A1 CN 2015077154 W CN2015077154 W CN 2015077154W WO 2016149976 A1 WO2016149976 A1 WO 2016149976A1
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green
red
liquid crystal
blue
fibers
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English (en)
French (fr)
Inventor
唐敏
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/758,958 priority Critical patent/US20170045660A1/en
Publication of WO2016149976A1 publication Critical patent/WO2016149976A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • G02B6/0005—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 of the fibre type
    • G02B6/001—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 of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02B6/0005—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 of the fibre type
    • G02B6/0006—Coupling light into the fibre
    • 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
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a fiber backlight module and a liquid crystal display.
  • Liquid Crystal Display has many advantages such as thin body, power saving, no radiation, etc., and has been widely used, such as mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or laptop screens. Wait.
  • PDAs personal digital assistants
  • LCD Liquid Crystal Display
  • the structure of the conventional liquid crystal panel is composed of a color filter substrate (Color Filter), a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer) disposed between the two substrates.
  • the working principle is that the rotation of the liquid crystal molecules of the liquid crystal layer is controlled by applying a driving voltage on the two glass substrates, and the light of the backlight module is refracted to generate a picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module needs to be used to display the image normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display.
  • the backlight module is divided into a side-in backlight module and a direct-lit backlight module according to different incident positions of the light source.
  • a light source for example, a cathode fluorescent lamp (CCFL) or a light emitting diode (LED)
  • CCFL cathode fluorescent lamp
  • LED light emitting diode
  • the side-lit backlight module has a backlight LED strip disposed at the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is from the side of the light guide plate (LGP).
  • the light surface enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and then is supplied to the liquid crystal panel through the optical film group to form a surface light source, and the liquid crystal panel needs to be matched with the color filter film on the CF substrate to realize color. display effect.
  • the main function of the CF substrate is to provide three primary colors of red, green and blue. Generally, three kinds of red, green and blue photoresists and three yellow light processes are required, and the average light transmittance is generally about 30%.
  • the process of the color filter film related process is complicated, the production machine cost is high, the red, green and blue photoresist is expensive, and the light utilization rate is low.
  • Optical fiber (abbreviated as optical fiber) is a light-conducting tool that utilizes the principle of total reflection of light in fibers made of glass or plastic.
  • the optical fiber has the advantages of low frequency bandwidth, low loss, light weight, strong anti-interference ability and high reliability, and is widely used in the cable television signal transmission and communication industry.
  • optical fiber technology some optical fibers have been able to pass through the laser process or remove other technologies of the optical fiber cladding, so that the optical fiber has the opportunity to be applied to the photoelectric display industry.
  • the object of the present invention is to provide a fiber backlight module capable of providing a liquid crystal panel with a surface light source of three primary colors of red, green and blue, so that the liquid crystal panel can realize color display without a color filter film, and can improve light transmittance and improve light transmittance.
  • the color saturation of the LCD display is to provide a fiber backlight module capable of providing a liquid crystal panel with a surface light source of three primary colors of red, green and blue, so that the liquid crystal panel can realize color display without a color filter film, and can improve light transmittance and improve light transmittance.
  • the color saturation of the LCD display is to provide a fiber backlight module capable of providing a liquid crystal panel with a surface light source of three primary colors of red, green and blue.
  • Another object of the present invention is to provide a liquid crystal display, which provides a light source by using a fiber backlight module, and the liquid crystal panel can realize color display without a color filter film, can effectively improve light transmittance, and has high color. saturation.
  • the present invention provides a fiber optic backlight module, including a backplane, red, green, and blue LED light sources disposed on the side of the backplane and arranged in series, and an array of optical fibers disposed on the backplane. And a prism sheet disposed on the array fiber, wherein the back plate is provided with a plurality of parallel and equally spaced grooves, wherein the array fibers are respectively fixed in the plurality of grooves, and each group of fibers includes red And a green, blue light guiding optical fiber, wherein the red, green and blue light guiding fibers are respectively connected to the red, green and blue LED light sources via a coupler.
  • the groove has an arc shape in cross section, and the groove surface is plated with a reflective film, and each groove is provided with an optical fiber.
  • Each set of optical fibers includes three optical fibers, and the red, green, and blue LED light sources are respectively conducted and overflowed in the red, green, and blue light guiding optical fibers to form red, green, and blue three-color line light sources;
  • the green and blue light guiding fibers are uniformly arranged in a sequence to form a surface light source in which the red, green and blue colors are parallel and equally spaced.
  • the present invention also provides a liquid crystal display, comprising a fiber backlight module, a liquid crystal panel disposed on the fiber backlight module, and a sealant for fixing the fiber backlight module and the liquid crystal panel;
  • the optical fiber backlight module includes a backplane, red, green, and blue LED light sources disposed on the side of the backplane, and an array of optical fibers disposed on the backplane, and disposed on the array of optical fibers.
  • a prism sheet having a plurality of parallel and equally spaced grooves perpendicular to the arrangement direction of the red, green and blue LED light sources, wherein the array fibers are respectively fixed in the plurality of grooves Every
  • the group of optical fibers includes red, green and blue light guiding fibers, and the red, green and blue light guiding fibers are respectively connected to the red, green and blue LED light sources via a coupler;
  • the liquid crystal panel includes a plurality of repeatedly arranged pixels, each pixel includes red, green, and blue sub-pixels, and the red, green, and blue light guiding fibers respectively correspond to the red, green, and blue sub-pixels. .
  • the liquid crystal panel includes a first substrate, a second substrate disposed opposite the first substrate, a sealant fixing the first substrate and the second substrate, a liquid crystal layer between the first substrate and the second substrate, An upper polarizing plate disposed above the first substrate and a lower polarizing plate disposed under the second substrate.
  • the upper polarizing plate is provided with a diffusion sheet, so that the light emitted from the liquid crystal panel is uniformly dispersed, and the viewing angle of the liquid crystal display can be effectively improved.
  • Each of the ribs on the prism sheet is disposed directly above one of the optical fibers such that the outgoing light in the left-right direction of each of the optical fibers is kept parallel.
  • Each set of optical fibers includes three optical fibers, and the light emitted by the red, green, and blue LED light sources respectively conducts and overflows in the red, green, and blue light guiding optical fibers to form red, green, and blue three-color line light sources;
  • the red, green and blue light guiding fibers are uniformly arranged in a plane to form a surface light source, and the surface light sources of red, green and blue are parallel and equally spaced.
  • the groove has an arc shape in cross section, and the groove surface is plated with a reflective film, and each groove is provided with an optical fiber.
  • the present invention also provides a liquid crystal display, comprising a fiber backlight module, a liquid crystal panel disposed on the fiber backlight module, and a sealant for fixing the fiber backlight module and the liquid crystal panel;
  • the optical fiber backlight module includes a backplane, red, green, and blue LED light sources disposed on the side of the backplane, and an array of optical fibers disposed on the backplane, and disposed on the array of optical fibers.
  • a prism sheet having a plurality of parallel and equally spaced grooves, wherein the array fibers are respectively mounted in the plurality of grooves, each group of fibers comprising red, green and blue light guiding fibers.
  • the red, green, and blue light guiding fibers are respectively connected to the red, green, and blue LED light sources via a coupler;
  • the liquid crystal panel includes a plurality of repeatedly arranged pixels, each pixel includes red, green, and blue sub-pixels, and the red, green, and blue light guiding fibers respectively correspond to the red, green, and blue sub-pixels. ;
  • the liquid crystal panel includes a first substrate, a second substrate disposed opposite the first substrate, a sealant fixing the first substrate and the second substrate, and a liquid crystal between the first substrate and the second substrate. a layer, an upper polarizing plate disposed above the first substrate, and a lower polarizing plate disposed under the second substrate;
  • the upper polarizing plate is provided with a diffusion sheet.
  • the optical fiber backlight module of the present invention has a plurality of parallel and equally spaced grooves on the back plate, wherein the plurality of grooves are respectively fixed with an array of optical fibers, and each set of optical fibers includes sequentially arranged.
  • Red, green, and blue light guiding fibers, and the red, green, and blue light guiding fibers are respectively connected to the red, green, and blue LED light sources via a coupler, thereby forming red, green, and blue colors in parallel.
  • the equally spaced surface light source can provide three primary colors of red, green and blue for the liquid crystal panel, so that the liquid crystal panel can realize color display without a color filter film, and can improve the transmittance of light and improve the color saturation of the liquid crystal display.
  • the liquid crystal display of the invention provides a light source by using a fiber backlight module, and the liquid crystal panel can realize color display without a color filter film, can effectively improve the light transmittance, and can select different red and green colors through the fiber backlight module.
  • the blue LED light source is used to obtain an ideal color gamut of the liquid crystal panel, thereby effectively improving the color saturation of the liquid crystal display.
  • FIG. 1 is a schematic diagram of forming a surface light source of the optical fiber backlight module of the present invention
  • FIG. 2 is a schematic cross-sectional view of a fiber optic backlight module of the present invention
  • FIG. 3 is a schematic cross-sectional view of a liquid crystal display of the present invention.
  • the present invention provides a fiber backlight module, including a back plate 11, and red, green, and blue LED light sources 161, 162, and 163 arranged on the side of the back plate 11 and arranged in sequence.
  • the backplane 11 is provided with a plurality of parallel and equally spaced grooves 111, the array
  • the optical fibers 13 are respectively mounted in the plurality of grooves 111.
  • Each of the optical fibers 13 includes red, green and blue light guiding fibers 131, 132, and 133, and the red, green and blue light guiding fibers 131, 132, and 133.
  • the red, green, and blue LED light sources 161, 162, and 163 are connected via a coupler 15, respectively.
  • the array of optical fibers 13 of the present embodiment is at least three groups, that is, at least three sets of optical fibers 13 are disposed on the backplane 11.
  • the optical fibers 131, 132, and 133 in the present invention are optical fibers that are removed from the cladding, thereby breaking a part of the total reflection condition, causing the light conducted in the optical fiber to overflow, and realizing the conversion of the point source to the line source.
  • the method of removing the cladding is laser.
  • each of the grooves 111 is provided with an optical fiber 131, 132 or 133.
  • the surface of the groove 111 is further plated with a reflective film 12, which can effectively improve the utilization of light. Since each of the optical fibers 13 includes three light guiding fibers 131, 132, and 133 of red, green, and blue, and only one optical fiber is installed in each of the grooves 111, the number of the grooves 111 on the backing plate 11 is the number of optical fibers. 3 times.
  • each set of optical fibers 13 includes three optical fibers, and the red, green, and blue LED light sources 161, 162, and 163 emit light in the red, green, and blue light guiding optical fibers 131, 132, and 133, respectively.
  • each set of optical fibers 13 may also comprise four optical fibers, such as red, green, blue, and white light guiding fibers.
  • the prism sheet 14 is in direct contact with the optical fibers 131, 132, and 133, and supports the weight thereof by the optical fibers 131, 132, and 133; each of the ribs on the prism sheet 14 is correspondingly disposed on one of the optical fibers 131 and 132. Or directly above 133, the outgoing light in the left and right direction of the fiber can be kept as parallel as possible to form a uniform surface light source.
  • the groove 111 has an arc shape in cross section.
  • the optical fiber backlight module has a plurality of parallel and equally spaced grooves on the back plate, wherein the plurality of grooves are fixed with an array of optical fibers, each of which includes red, green and blue light guiding fibers, and
  • the red, green, and blue light guiding fibers are respectively connected to the red, green, and blue LED light sources via a coupler, thereby forming a parallel, equally spaced surface light source of red, green, and blue colors, which can provide the liquid crystal panel.
  • the red, green and blue primary colors enable the liquid crystal panel to realize color display without a color filter film, and can improve the transmittance of light and improve the color saturation of the liquid crystal display.
  • the present invention further provides a liquid crystal display including a fiber backlight module 1 , a liquid crystal panel 2 disposed on the fiber backlight module 1 , and a fixed optical fiber backlight.
  • the optical fiber backlight module 1 includes a backboard 11 and red, green, and blue LED light sources 161, 162, and 163 disposed on the side of the backplane 11 and disposed on the backplane 11.
  • the array fiber 13 and the prism sheet 14 disposed on the array fiber 13.
  • the back plate 11 is provided with a plurality of parallel and equally spaced grooves 111, and the array fibers 13 are respectively mounted on the plurality of In the groove 111, each set of optical fibers 13 includes red, green, and blue light guiding fibers 131, 132, and 133, and the red, green, and blue light guiding fibers 131, 132, and 133 are respectively coupled to the red via the coupler 15.
  • the green and blue LED light sources 161, 162, and 163 are connected.
  • the liquid crystal panel 2 includes a plurality of repeatedly arranged pixels, and each pixel includes a sequential row The red, green, and blue sub-pixels of the column, the red, green, and blue light guiding fibers 131, 132, and 133 respectively corresponding to the red, green, and blue sub-pixels.
  • the liquid crystal panel 2 includes a first substrate 21, a second substrate 22 disposed opposite to the first substrate 21, a sealant 5 for fixing the first substrate 21 and the second substrate 22, and the first substrate
  • the color filter can be realized by the filter film.
  • a black matrix 231 is disposed under the first substrate 21, and the black matrix 231 can be used to block light leakage and prevent overlapping of light rays emitted by adjacent optical fibers 131, 132, and 133 in the optical fiber backlight module 1. Conducive to the display of the liquid crystal display panel 2.
  • the upper polarizing plate 31 is further provided with a diffusion sheet 24, which can uniformly distribute the parallel light emitted from the liquid crystal panel 2 in various directions to widen the viewing angle of the liquid crystal display.
  • each of the grooves 111 is mounted with an optical fiber 131, 132, or 133.
  • the surface of the groove 111 is further coated with a reflective film 12, which can effectively improve the utilization of light.
  • each set of optical fibers 13 includes three optical fibers, and the light emitted by the red, green, and blue LED light sources 161, 162, and 163 is respectively conducted in the red, green, and blue light guiding optical fibers 131, 132, and 133, and Overflow, forming red, green, and blue three-color line light sources; the array of red, green, and blue light guiding fibers 131, 132, and 133 are sequentially and uniformly arranged in a plane, forming red, green, and blue colors in parallel. Equally spaced surface light sources.
  • each set of optical fibers 13 may further include four optical fibers, such as red, green, blue, and white light guiding optical fibers.
  • the prism sheet 14 is in direct contact with the optical fibers 131, 132, and 133, and supports the weight thereof by the optical fibers 131, 132, and 133; each of the ribs on the prism sheet 14 is correspondingly disposed on one of the optical fibers 131 and 132. Or directly above 133, the outgoing light in the left and right direction of the fiber can be made as parallel as possible to form a uniform surface light source.
  • the liquid crystal layer 23 of the liquid crystal panel 2 is electrically conducted under the action of a thin film transistor (not shown), so that the liquid crystal molecules are sequentially arranged under the action of the alignment film, and the surface light source emitted from the optical fiber backlight module 1 is irradiated to the liquid crystal panel 2.
  • the liquid crystal layer 23 is provided with a desired color to realize color display.
  • the groove 111 has an arc shape in cross section.
  • the liquid crystal panel 2 is provided with a mark
  • the prism sheet 14 and the back plate 11 are both designed with alignment marks, and the alignment marks correspond to the marks on the liquid crystal panel 2.
  • the prism sheet 14 and the back plate 11 are paired, and then the sealant 3 is applied around the back plate 11, and then the liquid crystal panel 2 and the back plate 11 are paired.
  • Harden the frame glue 3 The connection between the liquid crystal panel 2 and the optical fiber backlight module 1 is realized.
  • the above liquid crystal display provides a light source by using a fiber backlight module, and the liquid crystal panel can realize color display without a color filter film.
  • the light transmittance can be increased by 300%, and different red colors can be selected through the fiber backlight module.
  • the green and blue LED light sources are used to obtain an ideal color gamut of the liquid crystal panel, thereby effectively improving the color saturation of the liquid crystal display.
  • the optical fiber backlight module of the present invention has a plurality of grooves arranged in parallel and equally spaced on the back plate, wherein the plurality of grooves are fixed with an array of optical fibers, each of which includes red, green, a blue light guiding optical fiber, and the red, green and blue light guiding optical fibers are respectively connected to the red, green and blue LED light sources via a coupler, thereby forming parallel, equally spaced surfaces of red, green and blue colors.
  • the light source can provide three primary colors of red, green and blue for the liquid crystal panel, so that the liquid crystal panel can realize color display without a color filter film, and can improve the transmittance of light and improve the color saturation of the liquid crystal display.
  • the liquid crystal display of the invention provides a light source by using a fiber backlight module, and the liquid crystal panel can realize color display without a color filter film, can effectively improve the light transmittance, and can select different red and green colors through the fiber backlight module.
  • the blue LED light source is used to obtain an ideal color gamut of the liquid crystal panel, thereby effectively improving the color saturation of the liquid crystal display.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种光纤背光模组及液晶显示器，光纤背光模组（1）包括背板（11）、设于背板侧边且依次排列的红、绿、蓝色LED光源（161，162，163）、设于背板上的数组光纤（13）及设于数组光纤上的棱镜片（14），背板上设有数个平行且等间距分布的凹槽（111），数组光纤分别固定于数个凹槽中，每组光纤包括红、绿、蓝色导光光纤（131，132，133），红、绿、蓝色导光光纤分别经由耦合器（15）与红、绿、蓝色LED光源相连接，能够为液晶面板（2）提供红绿蓝三原色的面光源，使液晶面板无需彩色滤光膜即可实现彩色显示，并可提升光的穿透率，提高液晶显示器的色彩饱和度。

Description

光纤背光模组及液晶显示器 技术领域
本发明涉及显示技术领域，尤其涉及一种光纤背光模组及液晶显示器。
背景技术
液晶显示器(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用，如：移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。
现有市场上的液晶显示器大部分为背光型液晶显示器，其主要包括背光模组(Backlight module)、及设于背光模组上的液晶面板。传统的液晶面板的结构是由一彩色滤光膜基板(Color Filter)、一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)以及一配置于两基板间的液晶层(Liquid Crystal Layer)所构成，其工作原理是通过在两片玻璃基板上施加驱动电压来控制液晶层的液晶分子的旋转，将背光模组的光线折射出来产生画面。由于液晶面板本身不发光，需要借由背光模组提供的光源来正常显示影像，因此，背光模组成为液晶显示器的关键组件之一。
背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背光模组。直下式背光模组是将发光光源(例如阴极萤光灯管(Cold Cathode Fluorescent Lamp，CCFL)或发光二极管(Light Emitting Diode，LED))设置在液晶面板后方，直接形成面光源提供给液晶面板。而侧入式背光模组是将背光源LED灯条(Light bar)设于液晶面板侧后方的背板边缘处，LED灯条发出的光线从导光板(Light Guide Plate，LGP)一侧的入光面进入导光板，经反射和扩散后从导光板出光面射出，再经由光学膜片组，以形成面光源提供给液晶面板，而液晶面板需搭配CF基板上的彩色滤光膜才能实现彩色显示效果。CF基板主要作用是提供红绿蓝三原色，一般需用到红绿蓝三种光刻胶及三道黄光制程，并且光的平均穿透率一般在30％左右。彩色滤光膜相关制程的工艺流程复杂，生产机台成本高，红绿蓝光刻胶价格昂贵，并且光的利用率较低。
光导纤维(简称光纤)是一种利用光在玻璃或塑料制成的纤维中的全反射原理而达成的光传导工具。光纤具有频带宽、损耗低、重量轻、抗干扰能力强、可靠性高等优点，被广泛应用于有线电视信号传输和通信行业。 随着光纤技术的发展，已有部分光纤可以通过镭射制程、或者去掉光纤包层的其他技术，让光纤有机会应用于光电显示行业。目前，有一些专利将光纤应用于背光源。其中，有的是为了提升背光源的均匀性及光线利用率，或者是让光热源远离液晶面板，起到较好的散热效果。但这些背光源仍需要搭配CF基板上的彩色滤光膜才能实现彩色显示效果，并未改善彩色滤光膜引起的光的利用率较低这一问题。
发明内容
本发明的目的在于提供一种光纤背光模组，能够为液晶面板提供红绿蓝三原色的面光源，使液晶面板无需彩色滤光膜即可实现彩色显示，并可提升光的穿透率，提高液晶显示器的色彩饱和度。
本发明的另一目的在于提供一种液晶显示器，通过采用光纤背光模组提供光源，液晶面板无需彩色滤光膜即可实现彩色显示，可有效提高光的穿透率，并具有较高的色彩饱和度。
为实现上述目的，本发明提供一种光纤背光模组，包括背板、设于所述背板侧边且依次排列的红、绿、蓝色LED光源、设于所述背板上的数组光纤、及设于所述数组光纤上的棱镜片，所述背板上设有数个平行且等间距分布的凹槽，所述数组光纤分别固定于所述数个凹槽中，每组光纤包括红、绿、蓝色导光光纤，所述红、绿、蓝色导光光纤分别经由耦合器与所述红、绿、蓝色LED光源相连接。
所述凹槽的截面呈弧形，所述凹槽表面镀有反射膜，每个凹槽安装一条光纤。
每组光纤包括三条光纤，所述红、绿、蓝色LED光源分别在所述红、绿、蓝色导光光纤内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。
所述棱镜片上的每个凸棱对应设于一条光纤的正上方，使得每条光纤左右方向的出射光保持平行。本发明还提供一种液晶显示器，包括光纤背光模组、设于所述光纤背光模组上的液晶面板、及固定所述光纤背光模组与液晶面板的框胶；
所述光纤背光模组包括背板、设于所述背板侧边且依次排列的红、绿、蓝色LED光源、设于所述背板上的数组光纤、及设于所述数组光纤上的棱镜片，所述背板上垂直于所述红、绿、蓝色LED光源的排列方向设有数个平行且等间距分布的凹槽，所述数组光纤分别固定于所述数个凹槽中，每 组光纤包括红、绿、蓝色导光光纤，所述红、绿、蓝色导光光纤分别经由耦合器与所述红、绿、蓝色LED光源相连接；
所述液晶面板包括数个重复排列的像素，每一像素包括红、绿、蓝色子像素，所述红、绿、蓝色导光光纤分别与所述红、绿、蓝色子像素相对应。
所述液晶面板包括第一基板、与所述第一基板相对设置的第二基板、固定第一基板与第二基板的框胶、位于所述第一基板与第二基板之间的液晶层、设于所述第一基板上方的上偏光板、及设于所述第二基板下方的下偏光板。
所述上偏光板上设有扩散片，使得从液晶面板中射出的光线均匀地发散开来，可有效提升液晶显示器的视角。
所述棱镜片上的每个凸棱对应设于一条光纤的正上方，使得每条光纤左右方向的出射光保持平行。
每组光纤包括三条光纤，所述红、绿、蓝色LED光源发出的光线分别在所述红、绿、蓝色导光光纤内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。
所述凹槽的截面呈弧形，所述凹槽表面镀有反射膜，每个凹槽安装一条光纤。
本发明还提供一种液晶显示器，包括光纤背光模组、设于所述光纤背光模组上的液晶面板、及固定所述光纤背光模组与液晶面板的框胶；
所述光纤背光模组包括背板、设于所述背板侧边且依次排列的红、绿、蓝色LED光源、设于所述背板上的数组光纤、及设于所述数组光纤上的棱镜片，所述背板上设有数个平行且等间距分布的凹槽，所述数组光纤分别安装于所述数个凹槽中，每组光纤包括红、绿、蓝色导光光纤，所述红、绿、蓝色导光光纤分别经由耦合器与所述红、绿、蓝色LED光源相连接；
所述液晶面板包括数个重复排列的像素，每一像素包括红、绿、蓝色子像素，所述红、绿、蓝色导光光纤分别与所述红、绿、蓝色子像素相对应；
其中，所述液晶面板包括第一基板、与所述第一基板相对设置的第二基板、固定第一基板与第二基板的框胶、位于所述第一基板与第二基板之间的液晶层、设于所述第一基板上方的上偏光板、及设于所述第二基板下方的下偏光板；
其中，所述上偏光板上设有扩散片。
本发明的有益效果：本发明的光纤背光模组，通过在背板上设有数个平行且等间距分布的凹槽，所述数个凹槽中分别固定有数组光纤，每组光纤包括依次排列的红、绿、蓝色导光光纤，并且所述红、绿、蓝色导光光纤分别经由耦合器与红、绿、蓝色LED光源相连接，从而形成红、绿、蓝三色平行且等间距分布的面光源，能够为液晶面板提供红绿蓝三原色，使液晶面板无需彩色滤光膜即可实现彩色显示，并可提升光的穿透率，提高液晶显示器的色彩饱和度。本发明的液晶显示器，通过采用光纤背光模组提供光源，液晶面板无需彩色滤光膜即可实现彩色显示，可有效提高光的穿透率，并可以通过光纤背光模组选择不同的红、绿、蓝色LED光源，以使液晶面板获得理想的色域，有效提高液晶显示器的色彩饱和度。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为本发明的光纤背光模组形成面光源的原理图；
图2为本发明的光纤背光模组的剖面示意图；
图3为本发明的液晶显示器的剖面示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请同时参阅图1与图2，本发明提供一种光纤背光模组，包括背板11、设于所述背板11侧边且依次排列的红、绿、蓝色LED光源161、162、163、设于所述背板11上的数组光纤13、及设于所述数组光纤13上的棱镜片14，所述背板11上设有数个平行且等间距分布的凹槽111，所述数组光纤13分别安装于所述数个凹槽111中，每组光纤13包括红、绿、蓝色导光光纤131、132、133，所述红、绿、蓝色导光光纤131、132、133分别经由耦合器15与所述红、绿、蓝色LED光源161、162、163相连接。
具体的，本实施例的数组光纤13至少为3组，即所述背板11上至少设有3组光纤13。
具体的，本发明中的光纤131、132、133为去除包层的光纤，从而破化部分全反射条件，使光纤内传导的光线溢出，实现点光源向线光源的转换。所述去除包层的方法为镭射。
进一步的，每个凹槽111安装一条光纤131、132或133，所述凹槽111表面还镀有反射膜12，可以有效提高光的利用率。由于每组光纤13包括红、绿、蓝色三个导光光纤131、132、133，每个凹槽111中只安装一条光纤，因此所述背板11上凹槽111的数量为光纤组数的3倍。
在本实施例中，每组光纤13包括三条光纤，所述红、绿、蓝色LED光源161、162、163发出的光线分别在所述红、绿、蓝色导光光纤131、132、133内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤131、132、133按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。作为一种变化方案，每组光纤13还可以包括四条光纤，如红、绿、蓝、白色导光光纤。具体的，所述棱镜片14与光纤131、132、133直接接触，并且由光纤131、132、133来支撑其重量；所述棱镜片14上的每个凸棱对应设于一条光纤131、132或133的正上方，可以使光纤左右方向的出射光尽量保持平行，以形成均匀的面光源。
具体的，所述凹槽111的截面呈弧形。上述光纤背光模组，通过在背板上设有数个平行且等间距分布的凹槽，所述数个凹槽中固定有数组光纤，每组光纤包括红、绿、蓝色导光光纤，并且所述红、绿、蓝色导光光纤分别经由耦合器与红、绿、蓝色LED光源相连接，从而形成红、绿、蓝三色平行且等间距分布的面光源，能够为液晶面板提供红绿蓝三原色，使液晶面板无需彩色滤光膜即可实现彩色显示，并可提升光的穿透率，提高液晶显示器的色彩饱和度。
请参阅图3，并结合图1与图2，本发明还提供一种液晶显示器，包括光纤背光模组1、设于所述光纤背光模组1上的液晶面板2、及固定所述光纤背光模组1与液晶面板2的框胶3。
具体的，所述光纤背光模组1包括背板11、设于所述背板11侧边且依次排列的红、绿、蓝色LED光源161、162、163、设于所述背板11上的数组光纤13、及设于所述数组光纤13上的棱镜片14，所述背板11上设有数个平行且等间距分布的凹槽111，所述数组光纤13分别安装于所述数个凹槽111中，每组光纤13包括红、绿、蓝色导光光纤131、132、133，所述红、绿、蓝色导光光纤131、132、133分别经由耦合器15与所述红、绿、蓝色LED光源161、162、163相连接。
所述液晶面板2包括数个重复排列的像素，每一像素分别包括依次排 列的红、绿、蓝色子像素，所述红、绿、蓝色导光光纤131、132、133分别与所述红、绿、蓝色子像素相对应。
具体的，所述液晶面板2包括第一基板21、与所述第一基板21相对设置的第二基板22、固定第一基板21与第二基板22的框胶5、位于所述第一基板21与第二基板22之间的液晶层23、设于所述第一基板21上方的上偏光板31、及设于所述第二基板22下方的下偏光板32。由于所述光纤背光模组1可以形成红、绿、蓝三色平行且等间距分布的面光源，能够为液晶面板2提供红绿蓝三原色的面光源，因此所述液晶面板2中无需设置彩色滤光膜，即可实现彩色显示。
进一步的，所述第一基板21下方还设有黑色矩阵231，所述黑色矩阵231可用于遮挡漏光和防止光纤背光模组1中相邻的光纤131、132、133发出的光线交叉重叠，有利于液晶显示面板2的显示。
进一步的，所述上偏光板31上还设有扩散片24，所述扩散片24可将液晶面板2出射的平行光均匀地分散至各个方向，扩宽液晶显示器的视角。
具体的，所述光纤背光模组1中，每个凹槽111安装一条光纤131、132、或133，所述凹槽111表面还镀有反射膜12，可以有效提高光的利用率。
具体的，每组光纤13包括三条光纤，所述红、绿、蓝色LED光源161、162、163发出的光线分别在所述红、绿、蓝色导光光纤131、132、133内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤131、132、133按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。进一步的，每组光纤13还可以包括四条光纤，如红、绿、蓝、白色导光光纤。
具体的，所述棱镜片14与光纤131、132、133直接接触，并且由光纤131、132、133来支撑其重量；所述棱镜片14上的每个凸棱对应设于一条光纤131、132或133的正上方，可以使光纤左右方向的出射光尽量平行，以形成均匀的面光源。
液晶面板2的液晶层23在薄膜晶体管(未示出)的作用下通电导通，使得液晶分子在配向膜的作用下有序排列，光纤背光模组1发出的面光源照射到液晶面板2的液晶层23，并呈现出需要的颜色，从而实现彩色显示。
具体的，所述凹槽111的截面呈弧形。
具体的，所述液晶面板2上设有标记，所述棱镜片14和背板11上均设计有对位标记，所述对位标记与液晶面板2上的标记相对应。组装时，首先将棱镜片14与背板11(凹槽111中设有光纤13)对组，然后在背板11周边涂布框胶3，再将液晶面板2与背板11对组，最后将框胶3硬化以 实现液晶面板2与光纤背光模组1的连接。
上述液晶显示器，通过采用光纤背光模组提供光源，液晶面板无需彩色滤光膜即可实现彩色显示，理论上光的穿透率可提升300％，并可以通过光纤背光模组选择不同的红、绿、蓝色LED光源，以使液晶面板获得理想的色域，有效提高液晶显示器的色彩饱和度。
综上所述，本发明的光纤背光模组，在背板上设有平行且等间距分布的数个凹槽，所述数个凹槽中固定有数组光纤，每组光纤包括红、绿、蓝色导光光纤，并且所述红、绿、蓝色导光光纤分别经由耦合器与红、绿、蓝色LED光源相连接，从而形成红、绿、蓝三色平行且等间距分布的面光源，能够为液晶面板提供红绿蓝三原色，使液晶面板无需彩色滤光膜即可实现彩色显示，并可提升光的穿透率，提高液晶显示器的色彩饱和度。本发明的液晶显示器，通过采用光纤背光模组提供光源，液晶面板无需彩色滤光膜即可实现彩色显示，可有效提高光的穿透率，并可以通过光纤背光模组选择不同的红、绿、蓝色LED光源，以使液晶面板获得理想的色域，有效提高液晶显示器的色彩饱和度。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (14)

  1. 一种光纤背光模组，包括背板、设于所述背板侧边且依次排列的红、绿、蓝色LED光源、设于所述背板上的数组光纤、及设于所述数组光纤上的棱镜片，所述背板上设有数个平行且等间距分布的凹槽，所述数组光纤分别安装于所述数个凹槽中，每组光纤包括红、绿、蓝色导光光纤，所述红、绿、蓝色导光光纤分别经由耦合器与所述红、绿、蓝色LED光源相连接。
  2. 如权利要求1所述的光纤背光模组，其中，所述凹槽的截面呈弧形，所述凹槽表面镀有反射膜，每个凹槽安装一条导光光纤。
  3. 如权利要求1所述的光纤背光模组，其中，每组光纤包括三条光纤，所述红、绿、蓝色LED光源发出的光线分别在所述红、绿、蓝色导光光纤内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。
  4. 如权利要求1所述的光纤背光模组，其中，所述棱镜片上的每个凸棱对应设于一条光纤的正上方，使得每条光纤左右方向的出射光保持平行。
  5. 一种液晶显示器，包括光纤背光模组、设于所述光纤背光模组上的液晶面板、及固定所述光纤背光模组与液晶面板的框胶；
    所述光纤背光模组包括背板、设于所述背板侧边且依次排列的红、绿、蓝色LED光源、设于所述背板上的数组光纤、及设于所述数组光纤上的棱镜片，所述背板上设有数个平行且等间距分布的凹槽，所述数组光纤分别安装于所述数个凹槽中，每组光纤包括红、绿、蓝色导光光纤，所述红、绿、蓝色导光光纤分别经由耦合器与所述红、绿、蓝色LED光源相连接；
    所述液晶面板包括数个重复排列的像素，每一像素包括红、绿、蓝色子像素，所述红、绿、蓝色导光光纤分别与所述红、绿、蓝色子像素相对应。
  6. 如权利要求5所述的液晶显示器，其中，所述液晶面板包括第一基板、与所述第一基板相对设置的第二基板、固定第一基板与第二基板的框胶、位于所述第一基板与第二基板之间的液晶层、设于所述第一基板上方的上偏光板、及设于所述第二基板下方的下偏光板。
  7. 如权利要求5所述的液晶显示器，其中，所述上偏光板上设有扩散片。
  8. 如权利要求5所述的液晶显示器，其中，所述棱镜片上的每个凸棱对应设于一条光纤的正上方，使得每条光纤左右方向的出射光保持平行。
  9. 如权利要求5所述的液晶显示器，其中，每组光纤包括三条光纤，所述红、绿、蓝色LED光源发出的光线分别在所述红、绿、蓝色导光光纤内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。
  10. 如权利要求5所述的液晶显示器，其中，所述凹槽的截面呈弧形，所述凹槽表面镀有反射膜，每个凹槽安装一条光纤。
  11. 一种液晶显示器，包括光纤背光模组、设于所述光纤背光模组上的液晶面板、及固定所述光纤背光模组与液晶面板的框胶；
    所述光纤背光模组包括背板、设于所述背板侧边且依次排列的红、绿、蓝色LED光源、设于所述背板上的数组光纤、及设于所述数组光纤上的棱镜片，所述背板上设有数个平行且等间距分布的凹槽，所述数组光纤分别安装于所述数个凹槽中，每组光纤包括红、绿、蓝色导光光纤，所述红、绿、蓝色导光光纤分别经由耦合器与所述红、绿、蓝色LED光源相连接；
    所述液晶面板包括数个重复排列的像素，每一像素包括红、绿、蓝色子像素，所述红、绿、蓝色导光光纤分别与所述红、绿、蓝色子像素相对应；
    其中，所述液晶面板包括第一基板、与所述第一基板相对设置的第二基板、固定第一基板与第二基板的框胶、位于所述第一基板与第二基板之间的液晶层、设于所述第一基板上方的上偏光板、及设于所述第二基板下方的下偏光板；
    其中，所述上偏光板上设有扩散片。
  12. 如权利要求11所述的液晶显示器，其中，所述棱镜片上的每个凸棱对应设于一条光纤的正上方，使得每条光纤左右方向的出射光保持平行。
  13. 如权利要求11所述的液晶显示器，其中，每组光纤包括三条光纤，所述红、绿、蓝色LED光源发出的光线分别在所述红、绿、蓝色导光光纤内传导并溢出，形成红、绿、蓝三色线光源；数组所述红、绿、蓝色导光光纤按顺序展开均匀一致地排列成面，形成红、绿、蓝三色平行且等间距分布的面光源。
  14. 如权利要求11所述的液晶显示器，其中，所述凹槽的截面呈弧形，所述凹槽表面镀有反射膜，每个凹槽安装一条光纤。
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