CN105223641A - A kind of quantum dot laser directing backlight module and bore hole 3D display device - Google Patents

A kind of quantum dot laser directing backlight module and bore hole 3D display device Download PDF

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Publication number
CN105223641A
CN105223641A CN201510622025.XA CN201510622025A CN105223641A CN 105223641 A CN105223641 A CN 105223641A CN 201510622025 A CN201510622025 A CN 201510622025A CN 105223641 A CN105223641 A CN 105223641A
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CN
China
Prior art keywords
guide plate
light guide
pixel
quantum dot
rectangular light
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Pending
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CN201510622025.XA
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Chinese (zh)
Inventor
陈林森
万文强
乔文
黄文彬
楼益民
朱鸣
罗明辉
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Suzhou University
SVG Optronics Co Ltd
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Suzhou University
SVG Optronics Co Ltd
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Priority to CN201510622025.XA priority Critical patent/CN105223641A/en
Publication of CN105223641A publication Critical patent/CN105223641A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/00362-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0075Arrangements of multiple light guides
    • G02B6/0076Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/34Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025Diffusing sheet or layer; Prismatic sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/0045Means 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 by shaping at least a portion of the light guide
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133614Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Abstract

A kind of quantum dot laser directing backlight module and bore hole 3D display device, comprise at least two mutual closely superimposed rectangular light guide plate, light guide plate exiting surface contains the pixel of different nanometer grating orientation, the blue light that light source group sends enters light guide plate inside after collimation, light guide plate inside is optical coupling out light guide plate surface by many groups pel array of light guide plate exiting surface, form the emergent light of different orientation, emergent light is radiated on red quantum point pixel laser instrument corresponding to light guide plate surface and green quantum dot pixel laser instrument, inspire redness and green light respectively, red, green, blue three color light line is in identical exit direction, define the directing white light backlight with different shooting angle, these shooting angles are corresponding with the multi-view image of liquid crystal display LCD, thus form colored 3D and show, can naked eye.

Description

A kind of quantum dot laser directing backlight module and bore hole 3D display device
Technical field
The present invention relates to dull and stereotyped bore hole 3D and show field, particularly relate to a kind of directing backlight module and the bore hole 3D display device based on this manufacturing backlight module.
Background technology
Along with the raising of people's living standard, plane 2D display has more and more been difficult to the demand meeting people, and people start to pursue the 3D display with depth perception, can the authenticity that exists of impression object clearly.First since proposing to utilize stereoscope to realize 3D display from Wheatstone in 1838, through the development in century more than one, it is like a raging fire that the research of 3D display aspect is carried out, and the mode of the various 3D of realization display is suggested successively.
Do not need to wear during the viewing of bore hole 3D display technique and any help the instrument of looking (as eyes, the helmet etc.), bore hole 3D display technique comparatively ripe at present has disparity barrier and cylindrical lens array etc., and these technology have some unvanquishable defects, image resolution ratio is low, and to have watched of a specified duration easy generation parallax is tired.The directive property backlight technology that left and right replaces can realize high-resolution image 3D and show, as Taiwan Yu-MiounChu in 2005 proposes to utilize two wedge structure light guide plate, two groups of light sources and an absorption layer to make directive property backlight, and realize 3D display in conjunction with Fast transforms LCD flat panel; 09 year Japanese Johnc.Schultz etc. utilizes a light guide plate, two LED light sources, 3D films coordinate 120HzLCD flat board to show to realize full resolution 3D; Chinese patent CN201320143064.8 proposes directive property backlight 3D imaging system simultaneously, adopts two projection lens in conjunction with directive property 3D optical texture, realizes bore hole 3D display; Although the image resolution ratio that above-mentioned directive property backlight technology obtains is high, but be only limited to the viewing of single visual angle, Taiwan Chih-HungTing in 2011 etc. propose a kind of multi-user 3D membrane structure and are applied in list in the directive property back light system of visual angle for this reason, various visual angles 3D display can be realized, this 3D film is an inverted trapezoidal structure, emergent light can be divided 3 directions (or more direction) projection, can watch for 3 (or multiple) users simultaneously; Chinese patent CN201410187534.X proposes a kind of bore hole 3D backlight mould in addition, adopts one or more groups LED time sequence light source in conjunction with convex lens, polygon prism, disparity barrier, can realize various visual angles 3D display; But the design of back light source structure and precise processing precision are difficult to realize technically, and be easy to the crosstalk producing light.
After one piece of light guide plate surface produces multiple different orientation angle of setting as required and the nanometer diffraction grating in cycle, just can obtain the abundant light with different visual angles sensing in theory, each nanometer diffraction grating is considered as the words of a pixel, coordinate the control of color and gray scale, just can realize the bore hole 3D display under various visual angles.The existing light guide plate by nanometer diffraction grating is applied to backlight module, but there is following problem: for a nanometer diffraction grating, no matter from X positive dirction or X negative direction, incident light all can form diffraction outgoing, when such nanometer diffraction grating is applied in rectangular light guide plate as pixel, because rectangular light guide plate only has 2 to nonparallel opposite side, and the expression realizing color must rely on the collocation of RGB tri-kinds of colors (or other three looks), this just means the words using 3 colour light sources in one piece of rectangular light guide plate, the light source pair of parallel opposite side occurring two kinds of different colours must be had, in this case, the light of these two kinds of light sources can incide on same nanometer diffraction grating with positive and negative both direction, cause the light of the two kinds of colors of outgoing simultaneously on a pixel, thus " mixed light " is formed.Patent US20140300960A1 proposes a kind of directive property backing structure, adopts the field distribution of pixelation Grating Modulation emergent light, proposes to adopt hexagon or the coupling of triangular wave guide structure R, G, B tri-coloured light simultaneously, realizes the orientation modulation of colorama.Patent US20140293759A1 proposes a kind of various visual angles 3D wrist watch structure, adopt pixelation optical grating construction modulation light field, coordinate the refreshing of LCD image, realize 3D effect display, but it is same, what this structure adopted is hexagon or the coupling of triangular wave guide structure R, G, B tri-coloured light, realizes colored display.International monopoly WO2014/051624A1 discloses and utilizes integrated hybrid laser waveguide array directive property backlight to realize all-round display, waveguide array is adopted to be coupled red, green, blue three coloured light, the orientation being realized light by pixel type grating is derived, this method shows although can realize colored 3D, but be that many waveguide arrays realize due to what adopt, the image resolution ratio obtained has substantial degradation, simultaneously very high to the accuracy requirement of directive property backing structure manufacture craft.The waveguiding structure that above-mentioned patent adopts is all hexagon or triangle, is difficult to combine with main flow display mode now, and be particularly difficult to be applied in the display mode of this rectangle specification of picture smart mobile phone, this will be unfavorable for industrial mass production.
Therefore, industry need badly a kind of structure more simply, more practical, the pixel directing backlight module of " the heterochromatic light " that there will not be two bundle directions identical or contrary in rectangular light guide plate and bore hole 3D display device.
Summary of the invention
In view of this, the present invention proposes a kind of quantum dot laser directing backlight module and the bore hole 3D display device based on this manufacturing backlight module, comprise at least two mutual closely superimposed rectangular light guide plate, one deck rectangular light guide plate exiting surface contains the pixel of different nanometer grating orientation, light guide plate inside is optical coupling out light guide plate surface by many groups pel array of light guide plate exiting surface, form the emergent light of different orientation, emergent light is radiated on red quantum point pixel laser instrument corresponding to another layer of light guide plate surface and green quantum dot pixel laser instrument, inspire redness and green light respectively, red, green, blue three color light line is in identical exit direction, define the directing white light backlight with different shooting angle, these shooting angles are corresponding with the multi-view image of liquid crystal display LCD, thus form colored 3D and show, can naked eye.
A kind of quantum dot laser directing backlight module that object according to the present invention proposes, it is characterized in that: comprise at least two mutual superimposed rectangular light guide plate, the exiting surface of described rectangular light guide plate is provided with multiple pel array, in orderly or unordered mode, respective pixel is fitted together to each other between each pel array, and be evenly distributed on the exiting surface of described light guide plate, the light that pixel in same pel array sends points to same visual angle, different pel arrays has different visual angles, a side of described one deck rectangular light guide plate is provided with a light source group, single pixel in described this layer of rectangular light guide plate is nanometer diffraction grating, single pixel in described other layer of rectangular light guide plate is the quantum dot laser structure of pixelation, after the light that described light source group sends enters corresponding light guide plate inside, excite described quantum dot laser luminous, each pixel of multiple pel arrays of described light guide plate exiting surface forms emergent light, be totally reflected in all the other places of described light guide plate inside.
Preferably, the quantity of described rectangular light guide plate is two, wherein the first rectangular light guide plate comprises two groups of pixelation quantum dot laser structures, second rectangular light guide plate arranges a light source group in the side of its pair of parallel opposite side, the light that light source group sends can excite described quantum dot laser, makes each group of quantum dot laser send different color of light.
Preferably, the exiting surface of described second rectangular light guide plate is whole light guide plate breadth, and the exiting surface of the first rectangular light guide plate is part exiting surface, accounts for 2/3rds of whole exiting surface.
Preferably, the projected position of pixel in described second rectangular light guide plate of described first rectangular light guide plate, aims at at least part of pixel of the second rectangular light guide plate.
Preferably, in described first rectangular light guide plate, each pixel comprises the sub-pixel of two kinds of different colours, the light wherein sent from first group of quantum dot laser is as the first sub-pixel outgoing, the light sent from second group of quantum dot laser is as the second sub-pixel outgoing, and the direction of the light of two of same pixel sub-pixel outgoing is identical.
Preferably, the light that each pixel in described second rectangular light guide plate sends penetrates after described first rectangular light guide plate, excite the quantum dot laser in described first rectangular light guide plate luminous, the light that the pixel that in the first rectangular light guide plate, the injection direction of each pixel is adjacent with this pixel projected position in the second rectangular light guide plate penetrates has identical direction simultaneously.
Preferably, the quantity of described rectangular light guide plate is three, wherein the first rectangular light guide plate comprises first group of pixelation quantum dot laser structure, second rectangular light guide plate comprises second group of pixelation quantum dot laser structure, 3rd rectangular light guide plate is only provided with a light source group on the side of its pair of parallel opposite side, the light that light source group sends can excite described quantum dot laser structure, makes each group of quantum dot laser structure send different color of light.
Preferably, the exiting surface of described 3rd rectangular light guide plate be whole breadth, described second rectangular light guide plate exiting surface towards the non-exiting surface of described first rectangular light guide plate, and first, second rectangular light guide plate exiting surface respectively accounts for 1/3rd of whole breadth, and three carries out superimposed.
Preferably, the each pixel of single pixel in the projected position and described second rectangular light guide plate of described second rectangular light guide plate in described first rectangular light guide plate, the two forms dislocation, in described first rectangular light guide plate, the single pixel of single pixel in the projected position and described second rectangular light guide plate of described 3rd rectangular light guide plate is at the projected position of described 3rd rectangular light guide plate, aims at the partial pixel in the 3rd rectangular light guide plate.
Preferably, the each pixel of single pixel in the projected position and described second rectangular light guide plate of described second rectangular light guide plate in described first rectangular light guide plate, the two forms dislocation, in described first rectangular light guide plate, the single pixel of single pixel in the projected position and described second rectangular light guide plate of described 3rd rectangular light guide plate is at the projected position of described 3rd rectangular light guide plate, aims at the partial pixel in the 3rd rectangular light guide plate.
Preferably, penetrated after the light that in described 3rd rectangular light guide plate, each pixel sends enters the second rectangular light guide plate, the first rectangular light guide plate, excite the quantum dot laser in first, second rectangular light guide plate described luminous simultaneously, penetrate after eventually passing the first rectangular light guide plate, and each pixel in described first rectangular light guide plate, with a correspondence the 3rd rectangular light guide plate that described projected position is adjacent, and the light that the pixel in correspondence second rectangular light guide plate sends, the exit direction of three is identical.
Preferably, described light source group comprises a monochromatic source, a light source colimated light system and a prism, and the light that described monochromatic source sends is collimated by described light source colimated light system, then enters described light guide plate inside by prism, and forms total reflection light.The quantum dot laser of described pixelation comprises quantum-dot structure and raster resonator structure, adopts directed blue-light excited, can excite red, green glow directional transmissions.
Preferably, described light source colimated light system adopts planar Fresnel lens arra.
Preferably, described light source group sends blue light, and described first group of quantum dot laser structure sends ruddiness through blue-light excited, and described second group of quantum dot laser structure sends green glow through blue-light excited.
Preferably, the visual angle of described multiple pel array is continuous distribution.
Preferably, the angular field of view of described multiple pel array is between 0-50 degree.
The invention allows for a kind of bore hole 3D display device, comprise quantum dot laser directing backlight module, be positioned at liquid crystal panel before this quantum dot laser directing backlight module, and drive the drive unit of this liquid crystal panel.
Preferably, described one deck rectangular light guide plate adopts the one-sided leaded light of parallel opposite side, described liquid crystal panel pixel is aimed at rectangular light guide plate pixel, the leaded light of rectangular light guide plate under different visual angles and the images match of liquid crystal panel under this visual angle, the required color that this multilayer rectangle light guide plate different colours switching simultaneously and liquid crystal panel form image mates, and obtains bore hole 3D display.
Compared with prior art, the present invention has following technical advantage:
By the coupling of pixelation quantum dot laser stimulated luminescence and nanometer grating, simplify the complicacy of directive property light conducting plate structure, utilize the superimposed of multilayer light guide plate, solve problem three-color light source cannot being avoided to interfere with each other in one piece of light guide plate, the backlight module of the direction-pointing function that this incorporating quantum dot laser excites and display device thereof, there is various visual angles 3D display, without the feature of visual fatigue, wide colour gamut, ultrathin, the commercial Application shown for bore hole 3D provides feasible program.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural drawing of nanometer diffraction grating under XY plane
Fig. 2 is the structural drawing of nanometer diffraction grating under XZ plane
Fig. 3 is the structural representation of quantum dot laser directing backlight module under first embodiment of the invention
Fig. 4 is the structural representation of light source group
Fig. 5 is the structural representation of quantum dot laser
Fig. 6 is the structural representation of the quantum dot laser directing backlight module under second embodiment of the invention
Fig. 7 uses the structural representation after quantum dot laser directing backlight module of the present invention composition 3D display device
Fig. 8 is the design sketch using 3D display device of the present invention to watch.
Embodiment
As described in the background art, in the multiple means realizing bore hole 3D, pixel directing backlight module, because can realize wider visual angle, obtains the favor of those skilled in the art, becomes one of following most possible large-scale application technology in bore hole 3D.The present invention devises a kind of concept of multilayer light guide plate and incorporating quantum dot laser structure, the light of one piece of maximum outgoing of rectangular light guide plate, two kinds of colors can be realized, solve same pixel in rectangular light guide plate and occur the problem of " mixed light ", then utilize different light guide plate, realize the collocation of RGB tri-kinds of colors.
Below, will be described in detail concrete technical scheme of the present invention.
Please also refer to Fig. 1 ~ Fig. 2, be the diffraction grating structural drawing under XY plane and XZ plane of a yardstick at Nano grade.According to grating equation, the cycle of nanometer diffraction grating 101, the angle of orientation meet following relation:
Wherein, light transmits along x-axis positive dirction, θ 1 and φ 1 represents the angle of diffraction (diffracted ray and z-axis positive dirction angle) of diffraction light 201 and the position angle (diffracted ray and x-axis positive dirction angle) of diffraction light 201 successively, θ and λ represents incident angle (incident ray and z-axis positive dirction angle) and the wavelength of light source 202 successively, Λ and φ represents cycle and the angle of orientation (grooved direction and y-axis positive dirction angle) of nanometer diffraction grating 101 successively, and n represents the refractive index of light wave in light guide plate.In other words, after providing incident ray wavelength, incident angle and diffracted ray angle of diffraction and diffraction position angle, just cycle of required nanometer diffraction grating and the angle of orientation can be gone out by above-mentioned two formulae discovery.Such as, 650nm wavelength ruddiness is with 60 ° of angle incidences (refractive index is for 1.5), and the angle of diffraction of diffraction light is 10 °, diffraction position angle is 45 °, and by calculating, the corresponding nanometer diffraction grating cycle is 550nm, and the angle of orientation is-5.96 °.
Refer to Fig. 3, Fig. 3 is the structural representation of pixelation quantum dot laser directing backlight module under first embodiment of the invention.Comprise the first rectangular light guide plate 311, second rectangular light guide plate 301, these two pieces of rectangular light guide plate, when reality uses, are closely superimposed together.The one side of definition luminescence is the exiting surface of this rectangular light guide plate, the exiting surface of every block rectangular light guide plate has been covered with pixel, each pixel in first rectangular light guide plate 311 represents a pixelation quantum dot laser structure, each pixel in second rectangular light guide plate 301 represents a nanometer diffraction grating, quantum dot laser can send ruddiness and green glow through blue-light excited, and keeps the direction of exciting light.For Fig. 3, the simple and easy exit direction showing the second rectangular light guide plate 301 is multiple pixel 311a-311c, 312a-312c, 313a-313c of 331a-331c in figure 3, these nanometer diffraction grating are actual is that size is at other point of micro/nano level, diffraction light is through the first rectangular light guide plate 311 outgoing, wherein the optical excitation quantum dot laser pixel 301a-303a of pixel 311a-331a outgoing is luminous, and the optical excitation quantum dot laser pixel 301b-303b of pixel 311b-313b outgoing is luminous.These various pixels define pel array one by one, in orderly or unordered mode, respective pixel is fitted together to each other between each pel array, and the pixel in each pel array is evenly distributed on the exiting surface of rectangular light guide plate.Wherein, the light that the pixel in same pel array sends points to same visual angle, and different pixels array then has different visual angles.For example, suppose always to co-exist in 10 pel arrays in this rectangular light guide plate, then in 10 visual angles, can see the image that each pel array is formed separately respectively, any continuous print two visual angles correspond in the eyes of people, can watch 3D image.Pixel in these 10 pel arrays is all evenly distributed on exiting surface, if give this 10 pel array numberings with 1-10, pixel in each pel array can arrange according to the sequence interval of 1-10, also can according to unordered mode arbitrary arrangement, as long as ensure, between every two neighbors in same pel array, to be nested with each self-corresponding pixel in all the other 9 pel arrays.It is to be noted, the light that pixel in each pel array sends points to same visual angle, the quantum dot laser not referring to random grating in same pel array or pixelation has identical emergence angle, and referring to that the light of these pixel outgoing points to same position, human eye can see in this position the light that in same pel array, all pixels send.The size of limited amount rectangular light guide plate under current process of pel array and the size of single pixel, when sacrificing certain resolution, multiple pel array can be produced in one piece of rectangular light guide plate, and the increase of pel array quantity, determine the increase can watching view number, in the ideal situation, namely when pel array is abundant, the visual angle of these pel arrays can be allowed to present the effect of continuous distribution, thus 3D image can be observed in any position reached such as between 0-50 degree.
Further, second rectangular light guide plate 301 is furnished with 1 light source group 321, light source group 321 blue light-emitting, first rectangular light guide plate 311 comprises two groups of pixelation quantum dot laser structures, as 301a-303a and 301b-303b, blue-light excited two groups of quantum dot laser pixels that light source group 321 sends send ruddiness and green glow, and as 301a-303a sends ruddiness, 301b-303b sends green glow.Light source group comprises blue light source, light source colimated light system and prism (not shown).Please refer to Fig. 4, light source group comprises blue light source 401, planar Fresnel lens arra 402, prism 403, wherein the light 404 that sends of blue light source 401 is after the first light source colimated light system 402, be collimated into plane wave 405, import in the second rectangular light guide plate 301 by prism 403, and in the second rectangular light guide plate 301, form total reflection light 406, when the total reflection light of the second rectangular light guide plate 301 inside suffers from the nanometer diffraction grating at pixel place, then gone out by this nanometer diffraction grating diffraction, form the emergent light 407 of different directions one by one.Under the regulation and control of these nanometer diffraction grating be designed, these emergent lights 407 are directed leaded light, thus multiplely have directing picture for being formed and provide light source.Two groups of pixelation quantum dot laser structures can be hard to bear blue-light excited, sends ruddiness and green glow, and keep the directivity of exciting light.With reference to Fig. 5, quantum dot laser comprises quantum-dot structure 501 and raster resonator 502, incident ray (blue light) 503 is through raster resonator and quantum dot, emergent light 504 can be excited, emergent light 504 can not only keep the direction of incident ray 503, and good monochromaticity can be had, the wavelength of exciting light and direction can be determined by quanta point material and raster resonator parameter.
In illustrated mode, the exiting surface of the second rectangular light guide plate 301 is the whole exiting surface of panel, and the exiting surface of the first rectangular light guide plate 311 is part exiting surface, and the exiting surface of its exiting surface and the second rectangular light guide plate 301 carries out superimposed.It is diagrammatically example, it is a thinner material with certain transparency because every block rectangular light guide plate is actual, therefore two pieces of rectangular light guide plate after superimposed, relatively under the light that sends of the second rectangular light guide plate 301 can carry out launching through the first rectangular light guide plate 311 and excite the quantum dot laser pixel light emission of the first rectangular light guide plate 311, it is noted herein that, at the light of the second rectangular light guide plate inside, carry out total reflection on the whole to propagate, but once after the transmission of nanometer diffraction grating is gone out, its lighting angle concentrates between the 0-45 degree of normal both sides usually, therefore from the light 331a that the second rectangular light guide plate 301 sends, except part is used for exciting light, when the first rectangular light guide plate 311 above covering, total reflection can not be formed, most light can directly be penetrated over, small part light is only had to be reflected and absorb, in like manner light 331b, 331c too.
Further, after after two pieces of rectangular light guide plate overlaps, be arranged in the projected position of each pixel in the second rectangular light guide plate 301 of the first rectangular light guide plate 311, just align with the partial pixel of the second rectangular light guide plate 301, enable the light of the second rectangular light guide plate 301 outgoing excite quantum dot pixel in the first rectangular light guide plate 311.Such as, the pixel 301a in the first rectangular light guide plate 311,302a, 303a align with the pixel 311a in the second rectangular light guide plate 301,312a, 313a; Pixel 301b, 302b, 303b and 311b, 312b, 313b align.
Further, with concept much the same on existing display device, for human eye, the pixel seen is actual is be made up of RGB tri-sub-pixels, and in the present embodiment, RGB tri-sub-pixels, actual is add that the sub-pixel be positioned in the second rectangular light guide plate 301 is formed by two sub-pixels be positioned in the first rectangular light guide plate 311, that is, in the first rectangular light guide plate 311, each pixel comprises the sub-pixel of two kinds of different colours, and the direction of the light of two of same pixel sub-pixel outgoing is identical.Certainly in conjunction with after the second rectangular light guide plate, a pixel should be interpreted as and comprise 3 sub-pixels, and 3 sub-pixels in same pixel have identical exit direction.That is, the light that each pixel in second rectangular light guide plate 301 sends penetrates and excites each pixel light emission in the first rectangular light guide plate 311 after the first rectangular light guide plate 301, and the light that the first rectangular light guide plate 311 each pixel light emission direction is penetrated in the pixel that the second rectangular light guide plate 311 projected position is adjacent with it has identical direction, such as, as Fig. 3, pixel 301a in first rectangular light guide plate 311, the light that 301b inspires is identical with the emergent light direction of the pixel 311c in the second rectangular light guide plate 301, in like manner 302a, 302b, 312c and 303a, 303b, 313c is also the same.
Refer to Fig. 6, Fig. 6 is the structural representation of the pixelation quantum dot laser directing backlight module under second embodiment of the invention.In this embodiment, altogether comprise three pieces of rectangular light guide plate, the exiting surface of every block rectangular light guide plate is all provided with the pixel that multiple difference is pointed to, wherein the pixel of first, second rectangular light guide plate 601,611 is by pixelation quantum dot laser Structure composing, the pixel of the 3rd rectangular light guide plate 621 is made up of nanometer diffraction grating, for the first rectangular light guide plate 601 in diagram, its exiting surface devises multiple pixel 602a-602c, the visual angle realizing direction 641a-641c is guide-lighting.The arranging rule of each pixel and identical in the first embodiment, do not repeat them here.Wherein the 3rd rectangular light guide plate 621 is provided with 1 light source group 631, first rectangular light guide plate 601 comprises one group of pixelation quantum dot laser structure, second rectangular light guide plate 602 comprises another group pixelation quantum dot laser structure, light source group 631 sends blue light, through the second, first rectangular light guide plate 611,601 outgoing, and excitation quantum dot laser structure light-emitting.Identical with the first embodiment, these three pieces of rectangular light guide plate are superimposed together each other and form whole backlight module.As illustrated in figure, the exiting surface of the 3rd rectangular light guide plate 621 is whole breadth, and the exiting surface of the second rectangular light guide plate 611 is towards the non-exiting surface of the first rectangular light guide plate 601, and three carries out superimposed.After superimposed, its total effect be in the second rectangular light guide plate 611 single pixel at the projected position of the first rectangular light guide plate 601, and the single pixel of correspondence in the first rectangular light guide plate 601, the two forms dislocation, first, second rectangular light guide plate 601, the projected position of single pixel in 611 in the 3rd rectangular light guide plate 621 is aimed at the partial pixel in the 3rd rectangular light guide plate 621, such as, pixel 602a-602c in first rectangular light guide plate 601 aims at the pixel 622a-622c in the 3rd rectangular light guide plate 621 respectively, pixel 612a-612c in second rectangular light guide plate 611 aims at the pixel 623a-623c in the 3rd rectangular light guide plate 621, and the pixel 602a in the first rectangular light guide plate 601, 602b, 602c, pixel 612a in second rectangular light guide plate 611, 612b, 612c, pixel 624a in 3rd rectangular light guide plate 621, 624b, 624c, three forms dislocation.
Light source group 631 comprises light source, light source colimated light system and prism, and what act on the first embodiment is identical.The standby light source of light source assembly is blue, excites each group of pixelation quantum dot laser structure to send the light of corresponding color.Quantum dot laser structure comprises quantum-dot structure and raster resonator, and working method is the same with the first embodiment.
According to the position relationship of three pieces of rectangular light guide plate, the light that in 3rd rectangular light guide plate 621, each pixel sends entered the second rectangular light guide plate 611, injection after first rectangular light guide plate 601, and excite the pixel light emission in the second rectangular light guide plate 611 and the first rectangular light guide plate 601, light direction is constant, and the light that each pixel in the second rectangular light guide plate 611 sends penetrates after the first rectangular light guide plate 601, and each pixel in the first rectangular light guide plate 601, with a correspondence the 3rd rectangular light guide plate 621 that projected position is adjacent, and the light that the pixel in correspondence second rectangular light guide plate 611 sends, the exit direction of three is identical, such as, pixel 612a in pixel 602a in first rectangular light guide plate 601 and the second rectangular light guide plate 611, the direction of the pixel 624a light outgoing in the 3rd rectangular light guide plate 621 is identical, in like manner 602b, 612b, 624b and 602c, 612c, 624c is also the same.The effect can seen with human eye illustrates, namely the light sent in above-mentioned three pieces of light guide plate is finally unified in the first rectangular light guide plate 601 and forms outgoing, and during outgoing, the position at the light place of three kinds of colors on same direction does not form overlap, consistent with the effect that regular display pixel has three sub-pixels.
In above-mentioned two embodiments, light source adopts monochromatic light, such as barcode LED light source.Light source colimated light system adopts fresnel lens array, and fresnel lens array can allow divergent light source become directional light, thus reduces the crosstalk of directive property light source different angles incidence.
Above-mentioned pixelation quantum dot laser directing backlight module, in conjunction with the refreshing of liquid crystal panel image, can realize bore hole 3D display.It is as follows that pixelation quantum dot laser directive property backlight module and liquid crystal panel combine mode: rectangular light guide plate adopts the mode of the one-sided leaded light of parallel opposite side, sub-pixel on liquid crystal panel and rectangular light guide plate sub-pixel alignment, rectangular light guide plate is at the Graphic Pattern Matching under this visual angle with the leaded light under different visual angles and liquid crystal panel, multilayer rectangle light guide plate different colours switches the required color forming image with liquid crystal panel and mates, refreshed by liquid crystal panel image sequential, obtain bore hole 3D display.
Refer to Fig. 7 ~ Fig. 8, Fig. 7 uses the structural representation after pixelation quantum dot laser directing backlight module of the present invention composition 3D display device.This 3D display device comprises pixelation quantum dot laser directing backlight module as above and is positioned at the liquid crystal panel 711 before this pixelation quantum dot laser directing backlight module, and drives the drive unit (not shown) of this liquid crystal panel 711.In figure, pixelation quantum dot laser directing backlight module represents light source group with 701,702 represent multilayer rectangle light guide plate superimposed after structure.Consider that visual angle is separated and focusing effect, pixelation quantum dot laser directing backlight module and liquid crystal panel 711 adopt following array mode, rectangular light guide plate 702 adopts the mode of the one-sided leaded light of parallel opposite side, the visual angle pixel that the multi-view image pixel of liquid crystal panel 711 display is corresponding with in rectangular light guide plate 702 is aimed at, the separation of multi-view image can be realized, color pattern alignment on the pixel of different colours and liquid crystal panel in the rectangular light guide plate 702 of multilayer, and form color range combination under the adjustment of the liquid crystal molecule on corresponding liquid crystal panel in pixel, the continuous sequential of image simultaneously on liquid crystal panel refreshes, just the bore hole 3D display of various visual angles can be realized.To be illustrated as example, the pixel 703a-703c in rectangular light guide plate 702, 704a-704c, 705a-705c and 706a-706c, correspond to visual angle 1 respectively, visual angle 2, visual angle 3, visual angle 4, suppose that human eye interpupillary distance is 60mm, visual angle spacing equals interpupillary distance, the suitableeest viewing distance is 300mm, and liquid crystal panel is of a size of 250mm width, and pixel is uniformly distributed in rectangular light guide plate surface, visual angle is uniformly distributed in the middle of viewing plane, through calculating, the visual angle (angle of emergent ray and z-axis positive dirction, getting deflection x-axis positive dirction is just) of nanometer pixel 703a-703c is respectively 6.7 °,-10.6 °,-26.1 °, the visual angle of nanometer pixel 704a-704c is respectively 13.5 °,-3.6 °,-20.1 °, the visual angle of nanometer pixel 705a-705c is respectively 20.1 °, 3.6 °,-13.5 °, the visual angle of nanometer pixel 706a-706c is respectively 26.1 °, 10.6 °,-6.7 °, the visual angle pixel 713a-713c simultaneously on liquid crystal panel 711, 714a-714c, 715a-715c, 716a-716c respectively with the pixel 703a-703c in rectangular light guide plate 702, 704a-704c, 705a-705c, 706a-706c aims at, and can realize the separation of four multi-view image like this, and the image simultaneously on liquid crystal panel constantly refreshes, simultaneously as embodiment 2, in 3, the pixel of multilayer rectangle light guide plate different colours is mated with the color of image finally generated under the regulation and control of liquid crystal molecule, then 3D rendering can be watched in any two continuous visual angles, such as, watches the stereoeffect of image 720.If display is parallax free plane picture on liquid crystal panel 711, then can realize the plane display of 2 dimensions, therefore such array mode supports the conversion between stereo-picture and plane picture simultaneously.
The rectangular light guide plate that the present invention is above-mentioned, wherein nanometer grating pixel can adopt ultraviolet to become empty photoetching technique and nano impression frequently continuously to make, and this ultraviolet becomes the lithographic equipment and photoetching method that empty photoetching technique frequently records with reference to the Chinese patent application that application number is CN201310166341.1 continuously.It is to be noted, in the present invention, both photoetching method can have been adopted to produce each different nanometer grating pointed in rectangular light guide plate surface etch, also the mask that can be used in impressing can first be produced, then by the large batch of pattern impressing out above-mentioned nanometer grating in rectangular light guide plate of nanometer technology by this photoetching method.
In sum, the invention discloses a kind of pixelation quantum dot laser directing backlight module and adopt the bore hole 3D display device of this pixelation quantum dot laser directing manufacturing backlight module.In the present invention, utilize the superimposed of multilayer light guide plate, solve the problem three light sources cannot being avoided to interfere with each other in one piece of light guide plate, thus achieve the rectangular light guide plate of pixel directing, in bore hole 3D display technique, carry out commercial Application for this light guide plate with various visual angles direction-pointing function and provide realistic plan, solve the insurmountable problem of prior art.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.

Claims (17)

1. a quantum dot laser directing backlight module, it is characterized in that: comprise at least two mutual superimposed rectangular light guide plate, the exiting surface of described rectangular light guide plate is provided with multiple pel array, in orderly or unordered mode, respective pixel is fitted together to each other between each pel array, and be evenly distributed on the exiting surface of described light guide plate, the light that pixel in same pel array sends points to same visual angle, different pel arrays has different visual angles, a side of described one deck rectangular light guide plate is provided with a light source group, single pixel in described this layer of rectangular light guide plate is nanometer diffraction grating, single pixel in described other layer of rectangular light guide plate is the quantum dot laser structure of pixelation, after the light that described light source group sends enters corresponding light guide plate inside, excite described quantum dot laser luminous, each pixel of multiple pel arrays of described light guide plate exiting surface forms emergent light, be totally reflected in all the other places of described light guide plate inside.
2. a kind of quantum dot laser directing backlight module as claimed in claim 1, it is characterized in that: the quantity of described rectangular light guide plate is two, wherein the first rectangular light guide plate comprises two groups of pixelation quantum dot laser structures, second rectangular light guide plate arranges a light source group in the side of its pair of parallel opposite side, the light that light source group sends can excite described quantum dot laser, makes each group of quantum dot laser send different color of light.
3. a kind of quantum dot laser directing backlight module as claimed in claim 2, it is characterized in that: the exiting surface of described second rectangular light guide plate is whole light guide plate breadth, the exiting surface of the first rectangular light guide plate is part exiting surface, accounts for 2/3rds of whole exiting surface.
4. a kind of quantum dot laser directing backlight module as claimed in claim 3, is characterized in that: the projected position of pixel in described second rectangular light guide plate of described first rectangular light guide plate, aims at at least part of pixel of the second rectangular light guide plate.
5. a kind of quantum dot laser directing backlight module as claimed in claim 4, it is characterized in that: in described first rectangular light guide plate, each pixel comprises the sub-pixel of two kinds of different colours, the light wherein sent from first group of quantum dot laser is as the first sub-pixel outgoing, the light sent from second group of quantum dot laser is as the second sub-pixel outgoing, and the direction of the light of two of same pixel sub-pixel outgoing is identical.
6. a kind of quantum dot laser directing backlight module as claimed in claim 4, it is characterized in that: the light that each pixel in described second rectangular light guide plate sends penetrates after described first rectangular light guide plate, excite the quantum dot laser in described first rectangular light guide plate luminous, the light that the pixel that in the first rectangular light guide plate, the injection direction of each pixel is adjacent with this pixel projected position in the second rectangular light guide plate penetrates has identical direction simultaneously.
7. a kind of quantum dot laser directing backlight module as claimed in claim 1, it is characterized in that: the quantity of described rectangular light guide plate is three, wherein the first rectangular light guide plate comprises first group of pixelation quantum dot laser structure, second rectangular light guide plate comprises second group of pixelation quantum dot laser structure, 3rd rectangular light guide plate is only provided with a light source group on the side of its pair of parallel opposite side, the light that light source group sends can excite described quantum dot laser structure, makes each group of quantum dot laser structure send different color of light.
8. a kind of quantum dot laser directing backlight module as claimed in claim 7, it is characterized in that: the exiting surface of described 3rd rectangular light guide plate be whole breadth, described second rectangular light guide plate exiting surface towards the non-exiting surface of described first rectangular light guide plate, and first, second rectangular light guide plate exiting surface respectively accounts for 1/3rd of whole breadth, and three carries out superimposed.
9. a kind of quantum dot laser directing backlight module as claimed in claim 8, it is characterized in that: each pixel of single pixel in the projected position and described second rectangular light guide plate of described second rectangular light guide plate in described first rectangular light guide plate, the two forms dislocation, in described first rectangular light guide plate, the single pixel of single pixel in the projected position and described second rectangular light guide plate of described 3rd rectangular light guide plate is at the projected position of described 3rd rectangular light guide plate, aims at the partial pixel in the 3rd rectangular light guide plate.
10. a quantum dot laser directing backlight module as claimed in claim 9, it is characterized in that: the light that in described 3rd rectangular light guide plate, each pixel sends entered the second rectangular light guide plate, penetrate after first rectangular light guide plate, excite described first simultaneously, quantum dot laser in second rectangular light guide plate is luminous, penetrate after eventually passing the first rectangular light guide plate, and each pixel in described first rectangular light guide plate, with a correspondence the 3rd rectangular light guide plate that described projected position is adjacent, and the light that the pixel in correspondence second rectangular light guide plate sends, the exit direction of three is identical.
11. quantum dot laser directing backlight modules according to any one of claim 1-10, it is characterized in that: described light source group comprises a monochromatic source, a light source colimated light system and a prism, the light that described monochromatic source sends is collimated by described light source colimated light system, then enter described light guide plate inside by prism, and form total reflection light.The quantum dot laser of described pixelation comprises quantum-dot structure and raster resonator structure, adopts directed blue-light excited, can excite red, green glow directional transmissions.
12. quantum dot laser directing backlight modules as claimed in claim 11, is characterized in that: described light source colimated light system adopts planar Fresnel lens arra.
13. as the quantum dot laser directing backlight module as described in arbitrary in claim 1-10, it is characterized in that: described light source group sends blue light, described first group of quantum dot laser structure sends ruddiness through blue-light excited, and described second group of quantum dot laser structure sends green glow through blue-light excited.
14. as arbitrary in claim 1-10 as described in quantum dot laser directing backlight module, it is characterized in that: the visual angle of described multiple pel array is continuous distribution.
15. quantum dot laser directing backlight modules as claimed in claim 14, is characterized in that: the angular field of view of described multiple pel array is between 0-50 degree.
16. 1 kinds of bore hole 3D display device, it is characterized in that: comprise the quantum dot laser directing backlight module according to any one of claim 1-15, be positioned at liquid crystal panel before this quantum dot laser directing backlight module, and drive the drive unit of this liquid crystal panel.
17. bore hole 3D display device as claimed in claim 16, it is characterized in that: described one deck rectangular light guide plate adopts the one-sided leaded light of parallel opposite side, described liquid crystal panel pixel is aimed at rectangular light guide plate pixel, the leaded light of rectangular light guide plate under different visual angles and the images match of liquid crystal panel under this visual angle, the required color that this multilayer rectangle light guide plate different colours switching simultaneously and liquid crystal panel form image mates, and obtains bore hole 3D display.
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