CN105572788A - Light guide plate, and backlight unit and display device including the same - Google Patents

Light guide plate, and backlight unit and display device including the same Download PDF

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Publication number
CN105572788A
CN105572788A CN201510506652.7A CN201510506652A CN105572788A CN 105572788 A CN105572788 A CN 105572788A CN 201510506652 A CN201510506652 A CN 201510506652A CN 105572788 A CN105572788 A CN 105572788A
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CN
China
Prior art keywords
dip plane
reflecting surface
guide plate
light guide
quarter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510506652.7A
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Chinese (zh)
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CN105572788B (en
Inventor
金东镕
尹种文
朴旼京
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New Optics Ltd
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New Optics Ltd
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Publication date
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Publication of CN105572788A publication Critical patent/CN105572788A/en
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Publication of CN105572788B publication Critical patent/CN105572788B/en
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into 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, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means 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
    • G02B6/003—Lens or lenticular sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means 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
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Abstract

Provided are a light guide plate, and a backlight unit and a display device including the same. The light guide plate includes a light output surface configured to output light to the outside; a reflective surface positioned opposite the light output surface; a light incident surface provided on at least one side surface of side surfaces which connect the light output surface and the reflective surface, and configured to receive light emitted from a light source; and a plurality of reflection patterns provided on the reflective surface.

Description

A kind of light guide plate, the backlight module comprising this light guide plate and display device
[technical field]
The present invention relates to a kind of light guide plate, comprise the backlight form unit of this light guide plate and display device, more specifically relate to a kind ofly improve the light guide plate of light diffusibleness, the backlight module containing this light guide plate and display device.
[background technology]
Backlight module (BLU:BackLightUnit) is the one providing the light supply apparatus of light to the picture rear of liquid crystal indicator, its not only can the directly brightness of image frame, color the image quality such as reproduction degree, angle of visibility, light dark ratio, readability, also can the parameter such as shape shadow power consumption, life of product, and backlight module is cost accounts for the core component of about 20 ~ 50% of whole liquid crystal indicator cost.
Backlight module can be roughly divided into straight-down negative (direct-lit) and side-light type (edge-lit) because of the installation site difference of light source.The light that straight-down negative directly uses the light source being located at picture dead astern to launch to liquid crystal panel direction, and side-light type uses the light source being located at the desired location of picture to side to the light launched, and guide this light by light guide plate to liquid crystal panel direction, provide light to display panel whereby.Because of the difference of described structure, straight-down negative has advantage in the brightness, light dark ratio, picture homogeneous degree, image reproduction power etc. of product, and side-light type has advantage in the thickness, cost etc. of product.
Recently, in field of display devices, because display device acts on raising as upholstery, the trend therefore conveniently having an advantage side-light type in outward appearance day by day increases.Particularly, it is a kind of trend that the ratio of the consumer of present purchase super-thin display increases, for adapting to this trend, the research that can reduce 3 ~ 5 diffusion sheets (diffusionsheet) at the rear being arranged on display panel is to greatest extent carried out just in high gear.But this type of display device is not because having required diffusion sheet, therefore cannot ensure the diffusivity of light, and then hot spot (hotspot) distinct issues can be brought.Therefore be necessary to develop a kind of light guide plate improving light diffusibleness.
[summary of the invention]
Technical matters
The technical matters that the present invention mainly solves is to provide and a kind ofly improves the light guide plate of light diffusibleness, the backlight module containing this light guide plate and display device.
Technical scheme
For solveing the technical problem, embodiments of the invention provide a kind of light guide plate, it comprises: externally radiative exiting surface, be arranged in the back side of exiting surface reflecting surface, be formed at least one side of the multiple sides connecting exiting surface and reflecting surface, and for the light that receives light source irradiation incidence surface and, form multiple reflection graphic patterns on the reflecting surface.Wherein, reflection graphic patterns comprises the moon portion at quarter of the inner recess to described reflecting surface.Portion comprised face and carried out tilting from described reflecting surface to described exiting surface and curved the first dip plane, the periphery be connected with described reflecting surface and carry out tilting from described first dip plane to described reflecting surface side and curved the second dip plane, the periphery be connected with described reflecting surface described cloudy quarter.
For solveing the technical problem, embodiments of the invention also provide a kind of backlight module, and it comprises light source for irradiating light and light guide plate.Described light guide plate comprises relative with described light source and for the incidence surface, perpendicular with described incidence surface and for the exiting surface externally penetrated by the light of incidence, the reflecting surface relative with described exiting surface and multiple reflection graphic patterns that are parallel with incidence surface and that be formed on described reflecting surface of the light that receives light source irradiation.Wherein, reflection graphic patterns comprises the moon portion at quarter of the inner recess to described reflecting surface.Portion comprised and carried out tilting from described reflecting surface to described exiting surface and curved the first dip plane, the periphery be connected with described reflecting surface and carry out tilting from described first dip plane to described reflecting surface side and curved the second dip plane, the periphery be connected with described reflecting surface described cloudy quarter.
Beneficial effect
The present invention can scattered light by reflection graphic patterns, and then the nephelometric turbidity unit that can improve from the light of light guide plate injection and diffusibleness.
The present invention, by improving the light guide plate of light scattering degree, can suppress the appearance of hot spot.
[accompanying drawing explanation]
Fig. 1 is the decomposing schematic representation of the display device relevant to embodiments of the invention;
Fig. 2 is the sectional drawing of the display device relevant to embodiments of the invention;
Fig. 3 is the schematic diagram of the light guide plate relevant to embodiments of the invention;
Fig. 4 is the back view of the light guide plate of the even density of the reflection graphic patterns relevant to embodiments of the invention;
Fig. 5 is the back view of the light guide plate of the Density inhomogeneity of the reflection graphic patterns relevant to embodiments of the invention;
Fig. 6 is the sectional drawing of the light guide plate relevant to embodiments of the invention;
Fig. 7 is the schematic diagram incidence surface relevant to embodiments of the invention being established figuratum light guide plate;
Fig. 8 is the schematic diagram exiting surface relevant to embodiments of the invention being established figuratum light guide plate;
Fig. 9 is the schematic diagram of the 1st example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 10 is the planimetric map of the 1st example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 11 is the sectional drawing of the 1st example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 12 is the schematic diagram of the 2nd example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 13 is the planimetric map of the 2nd example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 14 is the sectional drawing of the 2nd example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 15 is the schematic diagram of the 3rd example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 16 is the planimetric map of the 3rd example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 17 is the sectional drawing of the 3rd example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 18 is the schematic diagram of the 4th example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 19 is the planimetric map of the 4th example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 20 is the sectional drawing of the 4th example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 21 is the sectional drawing with the light guide plate of asymmetric reflective pattern relevant to embodiments of the invention;
Figure 22 is the schematic diagram of the 5th example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 23 is the planimetric map of the 5th example of the reflection graphic patterns relevant to embodiments of the invention;
Figure 24 is the sectional drawing of the 5th example of the reflection graphic patterns relevant to embodiments of the invention.
[explanation of reference numeral]
1000: display device
1600: backlight module
2000: light guide plate
2040: reflecting surface
2060: incidence surface
2200: reflection graphic patterns
2220: the moon portion at quarter
2222: the first dip plane
2224: the second dip plane
2240: boundary portion
2242: the first outer parts
2244: the second outer parts
2260: sun portion at quarter
[embodiment]
Below, be described in detail with reference to the accompanying drawing pair light guide plate relevant to embodiments of the invention, backlight form unit containing this light guide plate and display device.
Separately, for any reference numeral, as long as there is identical or corresponding inscape, identical or similar cross reference number can be quoted, and the repeat specification that it is carried out can be omitted.For convenience of description, the size of illustrated each element or shape can be expanded or reduce.
Embodiments of the invention provide a kind of light guide plate, and it comprises: externally radiative exiting surface; Be positioned at the reflecting surface at the back side of exiting surface; Be formed at least one side in the multiple sides connecting exiting surface and reflecting surface, and for the incidence surface of the light that receives light source irradiation; And the multiple reflection graphic patterns formed on the reflecting surface.Reflection graphic patterns comprises the moon portion at quarter of the inner recess to described reflecting surface.Described cloudy quarter, portion comprised: carry out tilting from described reflecting surface to described exiting surface and curved the first dip plane, the periphery be connected with described reflecting surface and carry out tilting from described first dip plane to described reflecting surface side and curved the second dip plane, the periphery be connected with described reflecting surface.
Described reflection graphic patterns rectangular quadrilateral when observing along the direction perpendicular to reflecting surface, the periphery of described first dip plane and described second dip plane is the curve heaved to the outside of described right angle quadrilateral.
The curvature of the curvature of the periphery of described first dip plane and the periphery of described second dip plane can be different.
In described first dip plane and described second dip plane, the curvature from the periphery of the dip plane close to described incidence surface is larger.
In described first dip plane and described second dip plane, the pitch angle of the dip plane that described curvature is larger is less.
In described first dip plane and described second dip plane, less dip plane, pitch angle be positioned at from described incidence surface more close to position.
In described first dip plane and described second dip plane, the pitch angle of the dip plane that pitch angle is less is 40 ~ 60 degree, and in described first dip plane and described second dip plane, the pitch angle of the dip plane that pitch angle is larger is 50 ~ 75 degree.
Described reflection graphic patterns can comprise further and to form to described reflecting surface side depression and to be formed in a pair side of the both sides of described first dip plane and described second dip plane, and the periphery that described a pair side is connected with described reflecting surface is respectively straight line.
Described reflection graphic patterns can comprise further rolling from exiting surface described in described reflecting surface side direction and tiltedly forms and be formed in a pair side of the both sides of described first dip plane and described second dip plane, and the periphery that described a pair side is connected with described reflecting surface is respectively curve.
The ratio of curvature at the position that described side is connected with described reflecting surface, the curvature at the position that the curvature at the position that described first dip plane is connected with described reflecting surface or described second dip plane are connected with described reflecting surface is less.
To the first sun portion at quarter of the outstanding formation in described reflecting surface side on the periphery that described reflection graphic patterns can be included in described first dip plane further.
Described reflection graphic patterns can be included in the second sun quarter portion of periphery to the outstanding formation of described reflecting surface of described second dip plane further.
Described in the peak height ratio in described first sun portion at quarter, the maximum height in the second sun portion at quarter is higher, and when observing along the direction perpendicular to reflecting surface, described in the area ratio in described first sun portion at quarter, the area in the second sun portion at quarter is larger.
Separately, other embodiments of the present invention also provide a kind of backlight module comprised for the light source and light guide plate irradiating light.Described light guide plate comprises: relative with described light source and for the incidence surface, perpendicular with described incidence surface and for the exiting surface externally penetrated by the light of incidence, the reflecting surface relative with described exiting surface and multiple reflection graphic patterns that are parallel with incidence surface and that be formed on described reflecting surface of the light that receives light source irradiation.Reflection graphic patterns comprises the moon portion at quarter of the inner recess to described reflecting surface.Described cloudy quarter, portion comprised: carry out tilting from described reflecting surface to described exiting surface and curved the first dip plane, the periphery be connected with described reflecting surface and carry out tilting from described first dip plane to described reflecting surface side and curved the second dip plane, the periphery be connected with described reflecting surface.
Described reflection graphic patterns rectangular quadrilateral when observing along the direction perpendicular to reflecting surface, the periphery of described first dip plane and described second dip plane is the curve heaved to the outside of described right angle quadrilateral.
The curvature of the periphery of described first dip plane can not be identical with the curvature of the periphery of described second dip plane.
In described first dip plane and described second dip plane, the curvature from the periphery of the dip plane close to described incidence surface is larger.
In described first dip plane and described second dip plane, the pitch angle of the dip plane that described curvature is larger is less.
In described first dip plane and described second dip plane, less dip plane, pitch angle be positioned at from described incidence surface more close to position.
The first sun portion at quarter from the periphery that described reflection graphic patterns can be included in described first dip plane further to the outstanding formation of described reflecting surface and, in the periphery of described second dip plane to the second sun portion at quarter of the outstanding formation of described reflecting surface.
Below the display device (1000) relevant to embodiments of the invention is described.It is all display device (1000) as capable of displaying image in LCD display device, PDP display device, OLED display etc. that this display device (1000) can be understood as.But be described centered by liquid crystal indicator (1000) for convenience of description in following content.
Fig. 1 is the decomposing schematic representation of the display device (1000) relevant to embodiments of the invention, and Fig. 2 is the sectional drawing of the display device (1000) relevant to embodiments of the invention.
Known with reference to figure 1 and Fig. 2, display device (1000) can comprise housing (1200), display panel (1400) and backlight module (1600).
Housing (1200), for accommodating display panel (1400) and backlight module (1600), protects the element of its inside not by the impact from outside whereby.Housing (1200) plays a part to integrate display panel (1400) and backlight module (1600).
Housing (1200) can comprise upper body (1220), lead-frame (1240) and lower case (1260).Upper body (1220) and lower case (1260) be combined with each other and protect the front and back of display device (1000) whereby, and lead-frame (1240) is arranged between these two housings.This lead-frame (1240) is fixed display panel (1400) together with the draw-in groove of upper body (1220), simultaneously lightguide plate fixing (2000) and multiple optical sheet (1620) together with lower case (1260).
The light show image that display panel (1400) utilizes backlight module (1600) to provide.
Display panel (1400) can comprise two transparency carriers and be clipped in the liquid crystal layer (1420) between this two substrate.Described transparency carrier can be colored filter substrate (colorfilter, 1460), thin film transistor base (TFT:ThinFilmTransistor, 1440).During by the gate line (gateline) of thin film transistor base (1440) and data line to liquid crystal layer (1420) input electrical signal, the arrangement mode of liquid crystal can change, and then can make with pixel (pixel) for unit carries out the light transmission liquid crystal layer (1420) of the backlight module (1600) selected, the light of permeate crystal layer (1420) encloses color and image output by colored filter substrate (1460).Thin film transistor base (1440) by printed circuit board (PCB) (PCB:PrintedCircuitBoard, figure do not show) with cover the panel driving portion (not shown) such as brilliant film (COF:ChipOnFilm), thin-film package body (TCP:TapeCarrierPackage) and conduct electricity and be connected also latter signal is provided.
Backlight module (1600) can provide light to the rear of display panel (1400), makes this display panel (1400) image output.
Backlight module (1600) can comprise optical sheet (1620), light source matrix (array, 1640), light guide plate (2000) and reflecting plate (1680).
Light source matrix (1640) can comprise the light source (1642) generating light and the light source substrate (1644) being provided with light source (1642).Cold-cathode tube (CCFL:ColdCathodeFluorescentLamp), external electrode fluorescence lamp (EEFL:ExternalElectrodeFluorescentLamp), light emitting diode (LED:LightEmittingDiode) etc. can be used as light source (1642).When adopting side-light backlight module (1600), in order to by the incident sideways of the light of light source matrix (1640) from light guide plate (2000), light source (1642) can be made to point to the side of the assigned position of display device (1000).When adopting down straight aphototropism mode set (1600), be the rear making light source (1642) point to display panel (1400), can be arranged in lower case (1260).Now, light source substrate (1644) can be arranged in lower case (1260) or light source substrate (1644) be set and directly light source (1642) be arranged in lower case (1260).
In side-light backlight module (1600), light guide plate (2000) can be arranged to the mode relative with the rear of display panel (1400).Now, this light guide plate (2000) can play the effect of light directed toward display panel (1400) side of light source (1642) directive side.For improving brightness, improve the measures such as hot spot and improve light uniformity coefficient, can on light guide plate (2000), below and the side of light source (1642) pattern is set.As the material of light guide plate (2000), can PMMA(PMMA:PolyMethlyMethacrylate be used), the material such as MS, MMA or glass.The more specific detail of light guide plate (2000) is carried out in following content.Separately, when adopting down straight aphototropism mode set (1600), because of the light guide plate (2000) not used for leaded light, therefore it should have the diffuser plate of diffusion light.
Optical sheet (1620) is arranged on the rear of display panel (1400) and relative with display panel (1400), can be arranged between display panel (1400) and light guide plate (2000) when being provided with light guide plate (2000).Example as optical sheet (1620) has diffusion sheet (1624) or prismatic lens (1622).Diffusion sheet (1624) evenly can spread the light penetrated from light guide plate (2000) or diffuser plate, can improve the photodistributed homogeneity of injection whereby, alleviates or suppresses as light and shade (dark/bright) striped of ripple (Moire) or the appearance of hot spot.The path of light can be adjusted to the direction perpendicular to display panel (1400) by prismatic lens (1622).Light through light guide plate (2000) or diffusion sheet (1624) can forwards disperse, prismatic lens (1622) can make these dispersed light penetrate to the direction perpendicular to display panel (1400), can improve brightness and the angle of visibility of display device (1000) whereby.In the optical sheet (1620) of an embodiment, as shown in Figure 1 and Figure 2, vertical prism sheets (1622a), horizon prism sheet (1622b), diffusion sheet (1624) is provided with near display panel (1400) place.Putting in order of these optical sheets (1620) not necessarily will follow putting in order of described embodiment completely.That is, a part of optical sheet in these optical sheets (1620) can be deleted or arranged multiple identical optical sheets (such as, can arrange the diffusion sheet (1624) of more than 2) or suitably change putting in order of these optical sheets according to actual needs.
Reflecting plate (1680) can be arranged in lower case (1260).Rearward light is penetrated, to display panel (1400) lateral reflection in the light that light source (1642) can launch by this reflecting plate (1680).The light that the back side from light guide plate (2000) or diffuser plate can be penetrated because of this reflecting plate (1680) to display panel (1400) lateral reflection, therefore can reduce the loss of light, improves the overall brightness of display device.
Below the light guide plate (2000) relevant to embodiments of the invention is described in more detail.
Fig. 3 is the schematic diagram of the light guide plate (2000) relevant to embodiments of the invention, Fig. 4 is the back view of the light guide plate (2000) of the even density of the reflection graphic patterns (2200) relevant to embodiments of the invention, Fig. 5 is the back view of the light guide plate (2000) of the Density inhomogeneity of the reflection graphic patterns (2200) relevant to embodiments of the invention, Fig. 6 is the sectional drawing of the light guide plate (2000) relevant to embodiments of the invention, Fig. 7 is the schematic diagram incidence surface (2060) relevant to embodiments of the invention being established figuratum light guide plate (2000), Fig. 8 is the schematic diagram exiting surface (2020) relevant to embodiments of the invention being established figuratum light guide plate (2000).
With reference to as known in 3 ~ Fig. 8, light guide plate (2000) can be tabular light guide plate.Therefore light guide plate (2000) has a pair cylinder and the multiple sides being connected cylinder.In a pair cylinder, the upper surface close with display panel (1400) is the exiting surface (2020) penetrating light to display panel (1400), and its opposite face is the reflecting surface (2040) for reflected light.In multiple side, at least one side is relative with light source (1642) and can receives the incidence surface (2060) of its light.General display device (1000) has the picture of quadrilateral, and therefore corresponding with it light guide plate (2000) also has the shape of quadrilateral.When light guide plate is quadrilateral tabular light guide plate (2000), relative a pair side in the side in four sides or a pair side opposing upper and lower or left and right can become incidence surface (2060).Separately, the light guide plate (2000) shown in Fig. 3 though be the uniform tabular light guide plate of its integral thickness, but also can change its thickness as required.In one embodiment, for improving into optical efficiency, also can by relative with light source (1642) in light guide plate (2000) and the thickness closing on the part of side is made thicker than other regions.
The light that this light guide plate (2000) penetrates by incidence surface (2060) reception light source (1642), and acted on by the inside leaded light of light guide plate (2000), the light of light source (1642) can be penetrated from exiting surface (2020).Reflecting surface (2040) plays the effect to exiting surface (2020) lateral reflection of the light that penetrated at the back side from light guide plate (2000).Incidence surface (2060), exiting surface (2020) and reflecting surface (2040) can arrange pattern for improving light inlet, leaded light and light extraction efficiency respectively.Particularly, reflecting surface (2040) can be arranged for reflection from the back side of light guide plate (2000), the reflection graphic patterns (2200) of the light namely penetrated from reflecting surface (2040).
Multiple reflection graphic patterns (2200) can be set on reflecting surface (2040).This reflection graphic patterns (2200), is located on reflecting surface (2040) in the mode of even density as shown in Figure 4, or is located on reflecting surface (2040) in the mode of Density inhomogeneity as shown in Figure 5.In larger panel, near producing luminance difference between the region of incidence surface (2060) of light guide plate (2000) and the region away from the incidence surface (2060) of light guide plate (2000).Now, by making density ratio away from the reflection graphic patterns (2200) in the region of incidence surface (2060) near the closeer mode of the density of the reflection graphic patterns (2200) in the region of incidence surface (2060), this luminance difference is alleviated.The density of reflection graphic patterns (2200) here can be defined by the spacing etc. of the size of the occupation rate of reflection graphic patterns (2200) in reflecting surface (2040), reflection graphic patterns (2200), reflection graphic patterns (2200).
This reflection graphic patterns (2200) manufactures by silk screen method (silkscreening), printing process, laser ablation method, evaporation coating method, method for stamping (pressing), mechanical stamping method etc.By described method, reflection graphic patterns (2200) can be made the light that penetrated at the back side from light guide plate (2000) effectively to the shape of exiting surface (2020) lateral reflection or refraction.Reflection graphic patterns (2200) shape is specifically described in the following.
In the light distribution angle of the incidence surface of light guide plate (2000) (2060) setting for improving the light that light source (1642) is injected, zigzag (serrated) pattern (2400) of diffusion effect can be increased.As shown in Figure 7, saw-tooth like pattern (2400) is mainly formed on incidence surface (2060), makes the sun portion at quarter extended along the vertical direction repeatedly arrange along the Width of incidence surface (2060) with the moon portion at quarter whereby.The guide-lighting pattern (2600) light incident by incidence surface (2060) being guided to the whole region of light guide plate (2000) can be set on the exiting surface of light guide plate (2000) (2020).Guide-lighting pattern (2600) repeats to be formed on exiting surface (2020) along the direction extension state perpendicular to incidence surface (2060), as shown in Figure 8, guide-lighting pattern (2600) can be designed to lens (lenticular) shape or quadrant prism shape.
Described saw-tooth like pattern (2400) and guide-lighting pattern (2600) can be one-body molded with light guide plate (2000) as reflection graphic patterns (2200), also above can form all saw-tooth like pattern (2400), guide-lighting pattern (2600) and reflection graphic patterns (2200) in light guide plate (2000).
Below, the reflection graphic patterns (2200) relevant to embodiments of the invention is described.
Reflection graphic patterns (2200) is formed in light guide plate (2000) with or recessed form outstanding from reflecting surface (2040), reflects the light penetrated from the back side of light guide plate (2000) whereby.By described reflection, the light quantity penetrated from the exiting surface (2020) of light guide plate (2000) can be increased, increase the brightness of display device (1000).
Reflection graphic patterns of the present invention (2200) can occur with prism pattern form substantially.When observing along the direction perpendicular to reflecting surface (2040), reflection graphic patterns (2200) comprises the region (calling sunk area in the following text) be recessed in prism form on reflecting surface (2040) on the whole.
Reflection graphic patterns (2200) manufactures mainly through mechanical stamping method, method for stamping etc.Concrete, sunk area manufactures by the mode in mechanical stamping method, method for stamping recessed reflector face (2040), and outburst area manufactures by the mode of depressed area to periphery movement.Adopt mechanical stamping method, the method for stamping of hot compression mode, effectively can improve the efficiency forming pattern.
This reflection graphic patterns (2200) can by and the light that to reflecting surface (2040) advances or the light that by exiting surface (2020) reflection retroreflection face (2040) advanced incident from incidence surface (2060), carry out to each region reflecting, reflecting or scattering, therefore can usable reflection light.Concrete, reflection graphic patterns (2200) can carry out reflecting in sun portion at quarter (2260) successively, scattering, after diffusion and reflection, cloudy portion at quarter (2220) reflects this light again, scattering, diffusion and reflection.Therefore the effect of the brightness uniformity improving overall exiting surface (2020) can be brought.
Below, the first case in the multiple example of the reflection graphic patterns (2200) relevant to embodiments of the invention is described.
Fig. 9 is the schematic diagram of the 1st example of the reflection graphic patterns (2200) relevant to embodiments of the invention, Figure 10 is the planimetric map of the 1st example of the reflection graphic patterns (2200) relevant to embodiments of the invention, and Figure 11 is the sectional drawing of the 1st example of the reflection graphic patterns (2200) relevant to embodiments of the invention.
Known with reference to figure 9 ~ Figure 11, the 1st example of the reflection graphic patterns (2200) relevant to embodiments of the invention comprises cloudy portion at quarter (2220) and surrounds the boundary portion (2240) in this moon portion at quarter (2220).
Cloudy portion at quarter (2220) is the structure caved in the inside relative to the reflecting surface (2040) as reference field.Cloudy portion at quarter (2220) can comprise the first dip plane (2222), the second dip plane (2224), the 3rd dip plane (2226) and the 4th dip plane (2228).Here the 3rd dip plane (2226) and the 4th dip plane (2228) are equivalent to the side of cloudy portion at quarter (2220).
In the reflection graphic patterns (2200) of the 1st example, when observing along the direction perpendicular to reflecting surface (2040), cloudy portion at quarter (2220) in square, right angle quadrilateral or antiparallelogram (but being described for right angle quadrilateral for convenience of description at following content).First dip plane (2222) adjacent with reflecting surface (2040) and the periphery of the second dip plane (2224) can be parallel with incidence surface (2060).First dip plane (2222) tilts to exiting surface (2020) direction from the position adjacent with reflecting surface (2040).Second dip plane (2224) tilts to exiting surface (2020) direction from the position adjacent with reflecting surface (2040).The end of the first dip plane (2222) and the second dip plane (2224) can be interconnected.3rd dip plane (2226) and the 4th dip plane (2228) are recessed to form from reflecting surface (2040) place, and then are connected with the bight of the first dip plane (2222), the second dip plane (2224) and reflecting surface (2040).The concrete shape of each dip plane can be prism shape.Namely, cloudy portion at quarter (2220) has the feature that when moving from boundary portion (2240) to the center in the moon portion at quarter (2220), its thickness increases gradually, and the 3rd dip plane (2226) and the 4th dip plane (2228) are formed between the end of the first dip plane (2222) and the second dip plane (2224).Wherein, the first dip plane (2222) can be identical with the pitch angle of the second dip plane (2224), and the 3rd dip plane (2226) also can be identical with the pitch angle of the 4th dip plane (2228).
Boundary portion (2240) is the periphery being positioned at the rectangular quadrilateral of cloudy portion at quarter (2220) and reflecting surface (2040) connecting place, square or equilateral quadrilateral.This boundary portion (2240) can comprise: be equivalent to the periphery of the first dip plane (2222) and reflecting surface (2040) connecting place the first outer part (2242) and, be equivalent to second outer part (2244) of the periphery of the second dip plane (2224) and reflecting surface (2040) connecting place.First outer part (2242) and the second outer part (2244) can be the outside curves outwardly from the moon portion at quarter (2220).Therefore the spacing between the first outer part (2242) and the second outer part (2244) is the widest in the middle part in the moon portion at quarter (2220), and the two ends its spacing the closer to the moon portion at quarter (2220) can be narrower.Now, the first outer part (2242) can be identical with the curvature of the second outer part (2244), and can become large because of the area of bending cloudy portion at the quarter (2220) of boundary portion (2240).
Can increase by described reflection graphic patterns (2200) area that incident light can arrive, increase the light quantity penetrated from exiting surface (2020) after reflection graphic patterns (2200) scattering, diffusion, effectively can improve the homogeneity of brightness whereby.
Below, the second case in the multiple example of the reflection graphic patterns (2200) relevant to embodiments of the invention is described.
Figure 12 is the schematic diagram of the 2nd example of the reflection graphic patterns (2200) relevant to embodiments of the invention, Figure 13 is the planimetric map of the 2nd example of the reflection graphic patterns (2200) relevant to embodiments of the invention, and Figure 14 is the sectional drawing of the 2nd example of the reflection graphic patterns (2200) relevant to embodiments of the invention.
Known with reference to Figure 12 ~ Figure 14, the 2nd example of the reflection graphic patterns (2200) relevant to embodiments of the invention comprises cloudy portion at quarter (2220) and surrounds the boundary portion (2240) in this moon portion at quarter (2220).The boundary portion (2240) of the 1st example include the periphery being equivalent to the first dip plane (2222) and reflecting surface (2040) connecting place the first outer part (2242) and, be equivalent to second outer part (2244) of the periphery of the second dip plane (2224) and reflecting surface (2040) connecting place, but the boundary portion (2240) of the 2nd example can comprise the periphery being equivalent to the 3rd dip plane (2226) and reflecting surface (2040) connecting place the 3rd outer part (2246) and, be equivalent to the 4th outer part (2248) of the periphery of the 4th dip plane (2228) and reflecting surface (2040) connecting place.
The shape in the moon portion at quarter (2220) of the reflection graphic patterns (2200) of the 2nd example is similar with the shape in the moon portion at quarter (2220) of the reflection graphic patterns (2200) of the 1st example on the whole, is therefore no longer described it at this.
The boundary portion (2240) of the reflection graphic patterns (2200) of the 2nd example comprise the periphery being equivalent to the 3rd dip plane (2226) and reflecting surface (2040) connecting place the 3rd outer part (2246) and, be equivalent to the 4th outer part (2248) of the periphery of the 4th dip plane (2228) and reflecting surface (2040) connecting place.3rd outer part (2246) and the 4th outer part (2248) can be the outside curves outwardly from the moon portion at quarter (2220), spacing between 3rd outer part (2246) and the 4th outer part (2248) is the widest in the middle part in the moon portion at quarter (2220), and the two ends its spacing the closer to the moon portion at quarter (2220) can be narrower.Now, the 3rd outer part (2246) can be identical or different with the curvature of the 4th outer part (2248).Ratio of curvature first outer part (2242) of the 3rd outer part (2246) and the 4th outer part (2248) and the curvature of the second outer part (2244) little.
Compared with the reflection graphic patterns (2200) of the 1st example, because the reflection graphic patterns (2200) of the 2nd example is containing the 3rd outer part (2246) and the 4th outer part (2248), therefore the area that incident light can arrive can be increased.And then the light quantity penetrated from exiting surface (2020) after reflection graphic patterns (2200) scattering, diffusion can be increased, effectively improve the homogeneity of brightness.
Below, the 3rd example in the multiple example of the reflection graphic patterns (2200) relevant to embodiments of the invention is described.
Figure 15 is the schematic diagram of the 3rd example of the reflection graphic patterns (2200) relevant to embodiments of the invention, Figure 16 is the planimetric map of the 3rd example of the reflection graphic patterns (2200) relevant to embodiments of the invention, and Figure 17 is the sectional drawing of the 3rd example of the reflection graphic patterns (2200) relevant to embodiments of the invention.
Known with reference to Figure 15 ~ Figure 17, the 3rd example of the reflection graphic patterns (2200) relevant to embodiments of the invention comprises cloudy portion at quarter (2220) and surrounds the boundary portion (2240) in this moon portion at quarter (2220).First dip plane (2222) of the 1st example is identical with the pitch angle of the second dip plane (2224), and the first outer part (2242) is also identical with the curvature of the second outer part (2244).But the pitch angle of first dip plane (2222) of the 3rd example and the second dip plane (2224) is different, and the curvature of the first outer part (2242) and the second outer part (2244) is also different.
First outer part (2242) of the reflection graphic patterns (2200) of the 3rd example and the curvature of the second outer part (2244) can be different.As wherein one example, the curvature of ratio second outer part (2244) that the curvature of the first outer part (2242) can be done is larger.
First dip plane (2222) of the reflection graphic patterns (2200) of the 3rd example and the pitch angle of the second dip plane (2224) different.As wherein one example, the pitch angle of ratio second dip plane (2224) pitch angle of the first dip plane (2222) can done is less.Now, the first dip plane (2222) can be gradual inclined-planes, and it is formed in from the position close to incidence surface (2060).When gradual inclined-plane is positioned at from position close to incidence surface (2060), the light incident from incidence surface (2060) can be carried out reflecting, reflecting to exiting surface (2020) side in wider scope.Certainly, the size at pitch angle and the curvature of outer part not necessarily will follow described relation completely, and that also the curvature of the outer part of dip plane large for pitch angle can be done is less.And, also as required side larger for pitch angle is formed in from the position close to incidence surface (2060).
In the reflection graphic patterns (2200) of the 3rd example, because its shape is asymmetric form, therefore the non-same tropism's feature in its optical characteristic, namely anisotropy feature can be more outstanding.The side that area in general dip plane is larger has stronger light scattering effect than the back side.Relative to the side of dip plane, the back side can provide better angle of visibility.By described anisotropy optical signature, brightness uniformity and the angle of visibility of display device (1000) can be improved.
Below, the 4th example in the multiple example of the reflection graphic patterns (2200) relevant to embodiments of the invention is described.
Figure 18 is the schematic diagram of the 4th example of the reflection graphic patterns (2200) relevant to embodiments of the invention, Figure 19 is the planimetric map of the 4th example of the reflection graphic patterns (2200) relevant to embodiments of the invention, and Figure 20 is the sectional drawing of the 4th example of the reflection graphic patterns (2200) relevant to embodiments of the invention.
Known with reference to Figure 18 ~ Figure 19, the 4th example of the reflection graphic patterns (2200) relevant to embodiments of the invention comprises cloudy portion at quarter (2220) and surrounds the boundary portion (2240) in this moon portion at quarter (2220).The boundary portion (2240) of the 3rd example include the periphery being equivalent to the first dip plane (2222) and reflecting surface (2040) connecting place the first outer part (2242) and, be equivalent to second outer part (2244) of the periphery of the second dip plane (2224) and reflecting surface (2040) connecting place, but the boundary portion (2240) of the 4th example can comprise the periphery being equivalent to the 3rd dip plane (2226) and reflecting surface (2040) connecting place the 3rd outer part (2246) and, be equivalent to the 4th outer part (2248) of the periphery of the 4th dip plane (2228) and reflecting surface (2040) connecting place.
The shape in the moon portion at quarter (2220) of the reflection graphic patterns (2200) of the 4th example is similar with the shape in the moon portion at quarter (2220) of the reflection graphic patterns (2200) of the 3rd example on the whole, is therefore no longer described it at this.
The boundary portion (2240) of the reflection graphic patterns (2200) of the 4th example can comprise the periphery being equivalent to the 3rd dip plane (2226) and reflecting surface (2040) connecting place the 3rd outer part (2246) and, be equivalent to the 4th outer part (2248) of the periphery of the 4th dip plane (2228) and reflecting surface (2040) connecting place.3rd outer part (2246) and the 4th outer part (2248) can be the outside curves outwardly from the moon portion at quarter (2220).Therefore the spacing between the 3rd outer part (2246) and the 4th outer part (2248) is the widest in the middle part in the moon portion at quarter (2220), and the two ends its spacing the closer to the moon portion at quarter (2220) can be narrower.Now, the 3rd outer part (2246) can be identical or different with the curvature of the 4th outer part (2248).
Compared with the reflection graphic patterns (2200) of the 3rd example, because the reflection graphic patterns (2200) of the 4th example is containing the 3rd outer part (2246) and the 4th outer part (2248), therefore the area that incident light can arrive can be increased.And then the light quantity penetrated from exiting surface (2020) after reflection graphic patterns (2200) scattering, diffusion can be increased, effectively improve the homogeneity of brightness.
In the reflection graphic patterns (2200) of the 4th example, because its shape is asymmetric form, therefore the non-same tropism's feature in its optical characteristic, namely anisotropy feature can be more outstanding.The side that area in general dip plane is larger has stronger light scattering effect than the back side.Relative to the side of dip plane, the back side can provide better angle of visibility.By described anisotropy optical signature, brightness uniformity and the angle of visibility of display device (1000) can be improved.
In described content, the situation that the dip plane that pitch angle is less arranges the larger boundary portion of curvature (2240) is illustrated, but as required, also can the larger boundary portion of curvature (2240) be set on the dip plane that pitch angle is larger.Separately, in described content, to by dip plane less for pitch angle, the situation be arranged on from the position close to incidence surface (2060) is illustrated, but also dip plane larger for pitch angle can be arranged on from the position close to incidence surface (2060).
Figure 21 is the sectional drawing with the light guide plate of asymmetric reflective pattern (2200) relevant to embodiments of the invention.
Known with reference to Figure 21, in reflection graphic patterns (2200), the less and dip plane that the curvature of outer part is larger, pitch angle the moon can being carved the dip plane in portion (2220) is located on reflecting surface (2040) along the direction near incidence surface (2060).The light generally entered from reflection graphic patterns (2200) mainly advances to incidence surface (2060) direction, therefore by arranging the method for the gradual dip plane (the first dip plane (2222)) in the moon portion at quarter (2220) of the outer part had compared with deep camber in the incident direction of light, the diffusion in the moon portion at quarter (2220) with larger area, dispersion effect can infinitely be amplified.Also can as required dip plane less for pitch angle be arranged on from the position away from incidence surface (2060).
Figure 22 is the schematic diagram of the 5th example of the reflection graphic patterns (2200) relevant to embodiments of the invention, Figure 23 is the planimetric map of the 5th example of the reflection graphic patterns (2200) relevant to embodiments of the invention, and Figure 24 is the sectional drawing of the 5th example of the reflection graphic patterns (2200) relevant to embodiments of the invention.
Known with reference to Figure 22 ~ Figure 24, the 5th example of the reflection graphic patterns (2200) relevant to embodiments of the invention comprises cloudy portion at quarter (2220), surrounds the boundary portion (2240) in this moon portion at quarter (2220) and sun portion at quarter (2260).4th example does not comprise sun portion at quarter (2260), but the 5th example comprises the sun quarter portion (2260) outstanding to the back side of exiting surface (2020) from boundary portion (2240).
The moon portion at quarter (2220) of the reflection graphic patterns (2200) of the 5th example and the shape of boundary portion (2240) on the whole with the moon portion at quarter (2220) of the reflection graphic patterns (2200) of the 4th example and the shape of boundary portion (2240) similar, therefore at this, it is no longer described.
Sun portion at quarter (2260) can be outstanding to the back side of exiting surface (2020) from the boundary portion of reflecting surface (2040) (2240).Can be different or identical with projecting height in the size in the upper outstanding sun portion at quarter (2260) of the first outer part (2242), the second outer part (2244), the 3rd outer part (2246) and the 4th outer part (2248).Such as, identical with projecting height in the size of the first outer part (2242) and upper the first and second outstanding sun portion at quarter (2260) of the second outer part (2244), identical with projecting height in the size in the 3rd outer part (2246) and the upper outstanding sun portion at quarter (2260) of the 4th outer part (2248), upper the first and second outstanding sun portion at quarter (2260) of the first outer part (2242) and the second outer part (2244) and the size in the 3rd outer part (2246) and the upper outstanding sun portion at quarter (2260) of the 4th outer part (2248) and projecting height different.Size and the projecting height of the first and second sun portion at quarter (2260) outstanding on the first outer part (2242) and the second outer part (2244) also can be different.Such as, in the first outer part (2242) and the second outer part (2244), be formed in the largest amount in the sun portion at quarter (2260) on the less outer part in pitch angle and projecting height than the largest amount in the sun portion at quarter (2260) be formed on the larger outer part in pitch angle and projecting height larger.Certainly, its structure also can.
In the reflection graphic patterns (2200) of the 5th example, because its shape is asymmetric form, therefore the non-same tropism's feature in its optical characteristic, namely anisotropy feature can be more outstanding.General in sun portion at quarter thickness thicker and the side that maximum height is higher has stronger light scattering effect than the back side.Therefore, can highly higher sun portion at quarter (2260) be located at from the position close to incidence surface, highly lower sun portion at quarter (2260) is located at from the position away from incidence surface.Certainly, its structure also can.
The maximum height in Yin Yangke portion (2260) and area difference, therefore its side can provide better angle of visibility than the back side.Particularly, maximum height and the area of sun portion at quarter (2260) are less, and the angle of visibility of correspondence direction can be better.Therefore utilize this anisotropy optical signature, brightness uniformity and the angle of visibility of display device (1000) can be improved.
In display device (1000), the angle of visibility of horizontal direction plays a part larger than the angle of visibility of longitudinal direction, therefore the method that arranged along the longitudinal direction of display device (1000) by maximum height is high, region that thickness is thick of sun portion at quarter (2260), can prevent the reduction of angle of visibility.And, longitudinal angle of visibility below angle of visibility and above in angle of visibility, because the setting position of prior angle of visibility is different, the region that maximum height is high, thickness is thick the moon can being carved portion (2220) is located at top or the below of display device (1000).Namely, because of the maximum height in sun portion at quarter (2260) and area ratio that are formed in the first outer part (2242) and the second outer part (2244) be formed in the maximum height of the 3rd outer part (2246) and the 4th outer part (2248) and area large, therefore better in vertical direction to the direction of the second outer part (2244) from the first outer part (2242).
Separately, in different occasion for guarantee luminance uniformity and angle of visibility simultaneously, light source matrix (1640) can be located at below and accommodation reflex pattern (2200), make the major part in the sun portion at quarter (2260) of reflection graphic patterns (2200) point to below, described two can be guaranteed whereby simultaneously.
In distance (absolute value of height or the degree of depth) in the vertical direction of the described reflection graphic patterns (2200) relevant to variation of the present invention, the depth capacity of cloudy portion at quarter (2220) is the darkest, and the maximum height of sun portion at quarter (2260) secondly.Concrete, the depth capacity of cloudy portion at quarter (2220) is about 20 ~ 100, and the maximum height of sun portion at quarter (2260) is about 0.5 ~ 10.When observing along the direction perpendicular to reflecting surface, the length of the longer direction of cloudy portion at quarter (2220) is about 20 ~ 150, and the length in shorter direction is about 20 ~ 100.Also the moon can be carved the extension of the longer direction in portion (2220) as required to identical with the length of the incidence surface (2060) of light guide plate (2000).And, as required also can by the length setting Cheng Gengchang in shorter direction.
The pitch angle of first dip plane (2222) of sun portion at quarter (2260) can be 40 ~ 60 degree, and the pitch angle of the second dip plane (2224) can be 50 ~ 70 degree.The pitch angle of the 3rd dip plane (2226) and the 4th dip plane (2228) can be 50 ~ 90 degree.
In the drawing, the surface of reflection graphic patterns (2200) is expressed as smooth surface, but the reflection graphic patterns of reality (2200) can have certain roughness, and particularly cloudy portion at quarter (2220) and sun portion at quarter (2260) can have larger roughness.
The parameter (spec) of described reflection graphic patterns (2200) is not limited to described height, the degree of depth, width, pitch angle, roughness etc., can need to carry out suitable change to it according to difference.
The reflection graphic patterns (2200) be formed on described reflecting surface (2040) can have identical parameter, and the reflection graphic patterns (2200) on the diverse location of reflecting surface (2040) also can have different parameters.Such as, when all reflection graphic patterns (2200) have identical parameter, favourable to manufacturing engineering, the production unit price etc. of product can be reduced.On the contrary, the closer to the reflection graphic patterns (2200) of incidence surface (2060) diameter more hour, the luminance uniformity of the exiting surface (2020) of whole light guide plate (2000) can be improved.
Better embodiment of the present invention is above for solving object of the present invention and disclosed content.The scope of the claims of the present invention is not limited to described content; the equivalent structure that those skilled in the art utilizes instructions of the present invention and accompanying drawing content to do or the correction that equivalent flow process is carried out, change and additional etc. time, these are revised, change and additional etc. to include in scope of patent protection of the present invention.

Claims (20)

1. a light guide plate, it comprises:
Externally radiative exiting surface;
Be positioned at the reflecting surface at the back side of exiting surface;
Incidence surface, it is formed at least one side in the multiple sides connecting exiting surface and reflecting surface, and for receiving the light of light source irradiation; And
Form multiple reflection graphic patterns on the reflecting surface;
Wherein, reflection graphic patterns comprises the moon portion at quarter of the inner recess to described reflecting surface,
Portion comprised and carried out tilting from described reflecting surface to described exiting surface and curved the first dip plane, the periphery be connected with described reflecting surface and carry out tilting from described first dip plane to described reflecting surface side and curved the second dip plane, the periphery be connected with described reflecting surface described cloudy quarter.
2. light guide plate according to claim 1, wherein,
When observing along the direction perpendicular to reflecting surface, the rectangular quadrilateral of described reflection graphic patterns;
The periphery of described first dip plane and the second dip plane is the curve heaved to the outside of described right angle quadrilateral.
3. light guide plate according to claim 1, wherein,
The curvature of the curvature of the periphery of described first dip plane and the periphery of described second dip plane is different.
4. light guide plate according to claim 3, wherein,
In described first dip plane and the second dip plane, the curvature from the periphery of the dip plane close to described incidence surface is larger.
5. light guide plate according to claim 3, wherein,
In described first dip plane and the second dip plane, the pitch angle of the dip plane that described curvature is larger is less.
6. light guide plate according to claim 5, wherein,
In described first dip plane and the second dip plane, less dip plane, pitch angle be positioned at from described incidence surface more close to position.
7. light guide plate according to claim 6, wherein,
In described first dip plane and the second dip plane, the pitch angle of the dip plane that pitch angle is less is 40 ~ 60 degree;
In described first dip plane and the second dip plane, the pitch angle of the dip plane that pitch angle is larger is 50 ~ 75 degree.
8. light guide plate according to claim 1, wherein,
Described reflection graphic patterns comprises further and to form to described reflecting surface depression and to be respectively formed at a pair side of the both sides of described first dip plane and the second dip plane;
The periphery that described a pair side is connected with described reflecting surface is respectively straight line.
9. light guide plate according to claim 1, wherein,
Described reflection graphic patterns comprises tilting to form from described reflecting surface to described exiting surface and being respectively formed at a pair side of the both sides of described first dip plane and the second dip plane further;
The periphery that described a pair side is connected with described reflecting surface is respectively curve.
10. light guide plate according to claim 9, wherein,
The curvature on the border that the curvature on the border that the curvature on the border that described side is connected with reflecting surface is connected with described reflecting surface with described first dip plane or described second dip plane are connected with described reflecting surface is compared can be less.
11. light guide plate according to claim 1, wherein,
What described reflection graphic patterns was included in described first dip plane further places and the first sun portion at quarter that is that formed outstanding to described reflecting surface outward.
12. light guide plate according to claim 11, wherein,
The second sun portion at quarter that the periphery that described reflection graphic patterns is included in described second dip plane is further outstanding to described reflecting surface and formed.
13. light guide plate according to claim 12, wherein,
Described in the peak height ratio in described first sun portion at quarter, the maximum height in the second sun portion at quarter is higher;
When observing along the direction perpendicular to reflecting surface, described in the area ratio in described first sun portion at quarter, the area in the second sun portion at quarter is larger.
14. 1 kinds of backlight modules, it comprises light source for irradiating light and light guide plate;
Described light guide plate comprises: with described light source thirty years of age and for the incidence surface, perpendicular with described incidence surface and for the exiting surface externally penetrated by the light of incidence, the reflecting surface at the back side being positioned at described exiting surface and multiple reflection graphic patterns that are parallel with incidence surface and that be formed on described reflecting surface of the light that receives light source irradiation in opposite directions;
Reflection graphic patterns comprises the moon portion at quarter of the inner recess to described reflecting surface;
Portion comprised and carried out tilting from described reflecting surface to described exiting surface and curved the first dip plane, the periphery be connected with described reflecting surface and carry out tilting from described first dip plane to described reflecting surface side and curved the second dip plane, the periphery be connected with described reflecting surface described cloudy quarter.
15. backlight modules according to claim 14, wherein,
When observing along the direction perpendicular to reflecting surface, the rectangular quadrilateral of described reflection graphic patterns;
The periphery of described first dip plane and described second dip plane is the curve heaved to the outside of described right angle quadrilateral.
16. backlight modules according to claim 14, wherein,
The curvature of the curvature of the periphery of described first dip plane and the periphery of described second dip plane is different.
17. backlight modules according to claim 16, wherein,
In described first dip plane and described second dip plane, the curvature from the periphery of the dip plane close to described incidence surface is larger.
18. backlight modules according to claim 17, wherein,
In described first dip plane and described second dip plane, the pitch angle of the dip plane that described curvature is larger is less.
19. backlight modules according to claim 18, wherein,
In described first dip plane and described second dip plane, less dip plane, pitch angle be positioned at from described incidence surface more close to position.
20. backlight modules according to claim 14, wherein,
The first sun portion at quarter that the periphery that described reflection graphic patterns is included in described first dip plane is further outstanding to described reflecting surface and the second sun quarter portion outstanding to described reflecting surface in the periphery of described second dip plane.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105929588A (en) * 2016-06-27 2016-09-07 广东长虹电子有限公司 Reflective paper of LCD (Liquid Crystal Display) TV and liquid crystal panel applying same
CN111010878A (en) * 2018-08-06 2020-04-14 瑞仪(广州)光电子器件有限公司 Light guide plate, backlight module and display device

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102546419B1 (en) * 2016-08-31 2023-06-21 엘지디스플레이 주식회사 Light guide plate and backlight unit having the same and liquid crystal display device having the same
CN106249341A (en) * 2016-09-12 2016-12-21 深圳Tcl新技术有限公司 Light guide plate, backlight module and display
KR101865856B1 (en) * 2017-04-28 2018-06-11 (주)코이즈 Light guide panel and method of manufacturing the same
CN107089003A (en) * 2017-05-31 2017-08-25 山西宇皓新型光学材料有限公司 Light-conducting board mold, light guide plate and preparation method thereof
KR102360611B1 (en) * 2017-07-13 2022-02-09 엘지전자 주식회사 Display device
JP2019029334A (en) * 2017-07-31 2019-02-21 オムロン株式会社 Light guide plate, plane light source device, display device, and electronics
CN107340648B (en) * 2017-09-07 2020-08-18 京东方科技集团股份有限公司 Back plate structure, backlight module, display device and manufacturing method of back plate structure
KR102571165B1 (en) * 2017-11-06 2023-08-25 주식회사 슈프리마에이치큐 Access control system and access control method using the same
US10755500B2 (en) 2017-11-06 2020-08-25 Moca System Inc. Access control system and access control method using the same
KR102041304B1 (en) 2018-04-10 2019-11-06 기민전자주식회사 Energy-saving Bidirectional Transparent Display Modules Deposited with Nanoparticles
CN109239834B (en) * 2018-08-31 2020-01-21 合肥泰沃达智能装备有限公司 Light guide plate for high-brightness backlight module
KR102358515B1 (en) * 2021-03-30 2022-02-08 (주)알토 Light guide plate processing device and light guide plate processing method using the same
KR20230013448A (en) * 2021-07-19 2023-01-26 주식회사 에이치비테크놀러지 A light guide plate using a grouping pattern and a display device including the same
KR102522095B1 (en) * 2021-09-29 2023-04-17 엘지디스플레이 주식회사 Display Device
CN114236669B (en) * 2021-12-22 2023-03-10 东莞市现代精工实业有限公司 Combined mesh point structure and light guide plate
TWI807623B (en) * 2022-01-17 2023-07-01 達運精密工業股份有限公司 Display module, backlight module and high-gain light guide plate
US11802677B2 (en) * 2022-04-01 2023-10-31 Tcl China Star Optoelectronics Technology Co., Ltd Backlight structure and display device
CN115032830B (en) * 2022-06-17 2024-02-27 Tcl华星光电技术有限公司 Display panel and preparation method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200540511A (en) * 2004-06-07 2005-12-16 Nano Prec Corp Back lighting apparatus
CN1758074A (en) * 2005-10-28 2006-04-12 财团法人国家实验研究院国家高速网络与计算中心 Microstructure of light conducting plate
CN1916723A (en) * 2005-08-19 2007-02-21 鸿富锦精密工业（深圳）有限公司 Plate of guiding light, and backlight module
CN1918428A (en) * 2004-02-20 2007-02-21 欧姆龙株式会社 Surface light source device
CN101634726A (en) * 2008-07-21 2010-01-27 鸿富锦精密工业（深圳）有限公司 Light panel and manufacturing method as well as backlight module adopting same
CN202102136U (en) * 2011-05-24 2012-01-04 深圳市德仓科技有限公司 Light guide plate and backlight module
CN104375236A (en) * 2014-11-26 2015-02-25 深圳市华星光电技术有限公司 Light guide plate, backlight module and display

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752505B2 (en) * 1999-02-23 2004-06-22 Solid State Opto Limited Light redirecting films and film systems
KR100756368B1 (en) * 2002-12-05 2007-09-10 삼성전자주식회사 Back light assembly and liquid crystal display having the same
CN101078795B (en) * 2006-05-24 2010-05-12 清华大学 Light conducting board and backlight module
JP2008084544A (en) * 2006-09-25 2008-04-10 Harison Toshiba Lighting Corp Light guide plate, lighting system, and backlight for liquid crystal display
CN101329423A (en) * 2007-06-21 2008-12-24 胜华科技股份有限公司 Light conducting plate and backlight module unit
CN101900299A (en) * 2009-05-26 2010-12-01 鸿富锦精密工业（深圳）有限公司 Light guide plate and backlight module
TWI412840B (en) * 2010-03-22 2013-10-21 Au Optronics Corp Light source module
CN102221156B (en) * 2010-04-06 2012-11-14 友达光电股份有限公司 Light source module
KR20120075097A (en) * 2010-12-28 2012-07-06 엘지디스플레이 주식회사 Backlight unit and liquid crystal display device having the same
CN202057826U (en) * 2011-05-24 2011-11-30 深圳市德仓科技有限公司 Light guide plate and thin type backlight module group
TWI453477B (en) * 2011-08-25 2014-09-21 Radiant Opto Electronics Corp Light guide plate and light source module
US8870434B2 (en) * 2011-09-12 2014-10-28 Skc Haas Display Films Co., Ltd. Asymmetric serrated edge light guide film having circular base segments
WO2014041828A1 (en) * 2012-09-13 2014-03-20 三菱電機株式会社 Planar light source device and display device using same
CN103851540A (en) * 2012-11-29 2014-06-11 南京高一智光学科技有限公司 Light guide plate for backlight module

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1918428A (en) * 2004-02-20 2007-02-21 欧姆龙株式会社 Surface light source device
TW200540511A (en) * 2004-06-07 2005-12-16 Nano Prec Corp Back lighting apparatus
CN1916723A (en) * 2005-08-19 2007-02-21 鸿富锦精密工业（深圳）有限公司 Plate of guiding light, and backlight module
CN1758074A (en) * 2005-10-28 2006-04-12 财团法人国家实验研究院国家高速网络与计算中心 Microstructure of light conducting plate
CN101634726A (en) * 2008-07-21 2010-01-27 鸿富锦精密工业（深圳）有限公司 Light panel and manufacturing method as well as backlight module adopting same
CN202102136U (en) * 2011-05-24 2012-01-04 深圳市德仓科技有限公司 Light guide plate and backlight module
CN104375236A (en) * 2014-11-26 2015-02-25 深圳市华星光电技术有限公司 Light guide plate, backlight module and display

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105929588A (en) * 2016-06-27 2016-09-07 广东长虹电子有限公司 Reflective paper of LCD (Liquid Crystal Display) TV and liquid crystal panel applying same
CN111010878A (en) * 2018-08-06 2020-04-14 瑞仪(广州)光电子器件有限公司 Light guide plate, backlight module and display device
US10914885B2 (en) 2018-08-06 2021-02-09 Radiant(Guangzhou) Opto-Electronics Co., Ltd Backlight module having a lightguide plate with optical structures and display device
CN111010878B (en) * 2018-08-06 2021-06-04 瑞仪(广州)光电子器件有限公司 Light guide plate, backlight module and display device

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