CN105572785A - 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
CN105572785A
CN105572785A CN201510506581.0A CN201510506581A CN105572785A CN 105572785 A CN105572785 A CN 105572785A CN 201510506581 A CN201510506581 A CN 201510506581A CN 105572785 A CN105572785 A CN 105572785A
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CN
China
Prior art keywords
quarter
guide plate
light guide
light
reflecting surface
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
CN201510506581.0A
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Chinese (zh)
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CN105572785B (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 CN105572785A publication Critical patent/CN105572785A/en
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Publication of CN105572785B publication Critical patent/CN105572785B/en
Active legal-status Critical Current
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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
    • G02B6/0033—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
    • G02B6/0015—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
    • G02B6/0013—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

Landscapes

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

Abstract

The present invention relates to a light guide plate, a backlight unit and a display device including the same. According to one aspect of the present invention, the light guide plate has a pair of principal surfaces and side surfaces connecting the principal surfaces. The light guide surface includes: a light incident surface provided on at least one surface among the side surfaces and receiving light from a light source; a light outputting surface provided on one surface among the principal surfaces and outputting the light incident from the light source; a reflecting surface provided on the other surface of the principal surfaces and having a unit area corresponding to pixels of the display panel and providing a plurality of pattern candidate spots; and a reflecting pattern formed in the pattern candidate spots randomly selected as many as the number of patterns assigned in the unit area among the pattern candidate spots of the unit area.

Description

Light guide plate, the backlight module comprising this light guide plate and display
Technical field
The present invention relates to light guide plate, comprise the backlight module of this light guide plate and display.More specifically, the present invention relates to light diffusibleness and obtain the light guide plate improved, the backlight module comprising this light guide plate and display.
Background technology
Backlight module (BLU:BackLightUnit) refers to the screen rear that is positioned at liquid crystal display and for providing the one of the light supply apparatus of light, it can not only picture quality and consumes power, the life of product etc. such as brightness, color reproduction, visual angle, contrast, readability of direct effect diagram picture, and its price also accounts for about 20 ~ 50% of the total unit price of liquid crystal display, therefore belongs to core component.
According to light source arrangement form, backlight module is roughly divided into straight-down negative (direct-lit)) and side-light type (edge-lit).The light that down straight aphototropism mode set uses the light source being positioned at screen dead astern to penetrate to liquid crystal panel, and side-light backlight module for from the light of light source being positioned at screen edge to side injection light light guide plate this light guided into liquid crystal panel and panel to display provides light.Owing to there is these structural differences, therefore, in the uniformity coefficient, image reproducing etc. of brightness, contrast, picture, down straight aphototropism mode set can advantageously, and in product thickness or expense etc., side-light type then advantageously.
Recently, in display industry, because display product is outstanding day by day as the value of interior decoration article, the proportion that product appearance has the side-light backlight module of greater advantages is increasing.Especially, along with consumer increases day by day to the demand of ultrathin display product, in order to closely follow this trend paces, carry out reducing to greatest extent the research of the diffusion sheet being loaded with about 3 ~ 5 at display panel rear just in high gear, may be there is following problem in such display product, as increased the weight of focus owing to cannot ensure the light diffusibleness be originally responsible for by diffusion sheet.Therefore, develop the technology that light diffusibleness obtains the light guide plate improved and become core technology gradually.
Summary of the invention
Technical matters
A technical matters of the present invention is, provides a kind of smooth diffusibleness to obtain the light guide plate improved, the backlight module comprising this light guide plate and display.
Another technical matters of the present invention is, the light guide plate providing a kind of focus to be inhibited, the backlight module comprising this light guide plate and display.
Technical scheme
According to one embodiment of present invention, the invention provides a kind of light guide plate, it comprises: exiting surface, and it is for outwards exporting light; Reflecting surface, it is positioned at the back side of described exiting surface; Incidence surface, its at least one side being arranged in the side connecting described exiting surface and reflecting surface also receives the light of the incidence by light source irradiation; And reflective graphics, around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface when it to have when looking up from the side perpendicular to described reflecting surface to the circle sun portion at quarter of the outer projection of described reflecting surface and looks up from the side perpendicular to described reflecting surface.Wherein, the center in described sun portion at quarter is not identical with the center in described the moon portion at quarter.
According to another embodiment of the invention, the invention provides a kind of backlight module, this backlight module comprises light source for irradiating light and light guide plate.Described light guide plate has incidence surface, exiting surface, reflecting surface and reflective graphics, wherein said incidence surface and described light source thirty years of age and the wherein light that irradiates of incident light source in opposite directions, described exiting surface is perpendicular to described incidence surface and incident light outwards can be exported, described reflecting surface is positioned at the back side of described exiting surface, and has reflective graphics on described reflecting surface.In addition, described reflective graphics comprises, around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface when looking up from the side that the circle of described reflecting surface projection sun portion at quarter is vertical with from described reflecting surface when looking up from the side that described reflecting surface is vertical.In addition, the center in described sun portion at quarter is not identical with the center in described the moon portion at quarter.
Beneficial effect
According to the present invention, make light generation scattering according to sun portion at quarter and the moon portion at quarter, thus improve nephelometric turbidity unit or the diffusibleness of the light exported by light guide plate.
In addition, according to the present invention, due to the light guide plate utilizing light scattering degree to be improved, thus focus can be improved.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of the display according to the embodiment of the present invention.
Fig. 2 is the sectional view of the display according to the embodiment of the present invention.
Fig. 3 is the oblique view of the light guide plate according to the embodiment of the present invention.
Fig. 4 is the back view of the light guide plate of the even density of reflective graphics according to the embodiment of the present invention.
Fig. 5 is the back view of the light guide plate of the Density inhomogeneity of reflective graphics according to the embodiment of the present invention.
Fig. 6 is the sectional view of the light guide plate according to the embodiment of the present invention.
Fig. 7 is the oblique view having the light guide plate of figure on incidence surface according to the embodiment of the present invention.
Fig. 8 is the oblique view having the light guide plate of figure on exiting surface according to the embodiment of the present invention.
Fig. 9 is the oblique view of the first embodiment of reflective graphics according to the embodiment of the present invention.
Figure 10 is the planimetric map of the first embodiment of reflective graphics according to the embodiment of the present invention.
Figure 11 is the sectional view of the first embodiment of reflective graphics according to the embodiment of the present invention.
Figure 12 is the oblique view of the second embodiment of reflective graphics according to the embodiment of the present invention.
Figure 13 is the planimetric map of the second embodiment of reflective graphics according to the embodiment of the present invention.
Figure 14 is the sectional view of the second embodiment of reflective graphics according to the embodiment of the present invention.
Figure 15 is the oblique view of the 3rd embodiment of reflective graphics according to the embodiment of the present invention.
Figure 16 is the planimetric map of the 3rd embodiment of reflective graphics according to the embodiment of the present invention.
Figure 17 is the sectional view of the 3rd embodiment of reflective graphics according to the embodiment of the present invention.
Figure 18 is the oblique view of the 4th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 19 is the planimetric map of the 4th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 20 is the sectional view of the 4th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 21 is the oblique view of the 5th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 22 is the planimetric map of the 5th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 23 is the sectional view of the 5th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 24 is the sectional view with the light guide plate of asymmetrical reflective graphics according to the embodiment of the present invention.
[explanation of reference numeral]
1000: display
1600: backlight module
2000: light guide plate
2040: reflecting surface
2060: incidence surface
2200: reflective graphics
2220: sun portion at quarter
2222: sunk area
2240: the moon portion at quarter
2242: the first the moon carve region
2244: the second the moon carve region
2260: outer part.
Embodiment
Below, the light guide plate of one embodiment of the present of invention, the backlight module comprising this light guide plate and display will be explained by reference to the accompanying drawings.
In addition, being will give same or analogous reference symbol to identical or corresponding composition important document and omit the repeat specification to this regardless of reference numeral, for ease of illustrating, can zooming in or out the size and shape of each shown building block.
In one aspect of the invention, the invention provides a kind of light guide plate, it comprises: exiting surface, and it is for outwards exporting light; Reflecting surface, it is positioned at the back side of described exiting surface; Incidence surface, its at least one side being arranged in the side connecting described exiting surface and reflecting surface also receives the light of the incidence by light source irradiation; And reflective graphics, around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface when it to have when looking up from the side perpendicular to described reflecting surface to the circle sun portion at quarter of the outer projection of described reflecting surface and looks up from the side perpendicular to described reflecting surface.Wherein, the center in described sun portion at quarter is not identical with the center in described the moon portion at quarter.
In addition, compared with the center in described sun portion at quarter, described cloudy quarter portion center can from described incidence surface more close to.
In addition, centered by described sun portion at quarter, in described the moon portion at quarter, the cup depth of side can not be identical with the cup depth of opposite side.
In addition, centered by described sun portion at quarter, the cup depth of side close with described incidence surface in described the moon portion at quarter can be darker.
In addition, the external diameter in described the moon portion at quarter can be 1.05 ~ 1.3 times of the external diameter in described sun portion at quarter.
In addition, the sunk area that the direction that described sun portion at quarter can have past described exiting surface is sunken.
In addition, the length direction of described sunk area can perpendicular to the direction at center to the center in described the moon portion at quarter from described sun portion at quarter.
In addition, when seeing from below, in fact described sunk area can form elliptical shape.
In addition, based on described sunk area, in described sun portion at quarter, the height of projection of side is not identical with the height of projection of opposite side.
In addition, based on described sunk area, the height of projection of side close with described incidence surface in described sun portion at quarter can be higher than the height of projection away from the side of described incidence surface in described sun portion at quarter.
In addition, described reflective graphics comprises further, the ring-type outer part of the outer projection around described the moon portion at quarter and to described reflecting surface when looking up from the side vertical with reflecting surface.
In addition, in another aspect of this invention, the invention provides a kind of backlight module, this backlight module comprises light source for irradiating light and light guide plate.Described light guide plate has incidence surface, exiting surface, reflecting surface and reflective graphics, wherein said incidence surface and described light source thirty years of age and the wherein incident light by light source irradiation in opposite directions, described exiting surface is perpendicular to described incidence surface and incident light outwards can be exported, described reflecting surface is positioned at the back side of described exiting surface, and has reflective graphics on described reflecting surface.In addition, described reflective graphics comprises, around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface when looking up from the side that the circle of described reflecting surface projection sun portion at quarter is vertical with from described reflecting surface when looking up from the side that described reflecting surface is vertical.In addition, the center in described sun portion at quarter is not identical with the center in described the moon portion at quarter.
In addition, compared with the center in described sun portion at quarter, described cloudy quarter portion center can from described incidence surface more close to.
In addition, centered by described sun portion at quarter, in described the moon portion at quarter, the cup depth of side can not be identical with the cup depth of opposite side.
In addition, centered by described sun portion at quarter, the cup depth of side close with described incidence surface in described the moon portion at quarter can be darker.
In addition, the external diameter in described the moon portion at quarter can be 1.05 ~ 1.3 times of the external diameter in described sun portion at quarter.
In addition, the sunk area that the direction that described sun portion at quarter can have past described exiting surface is sunken.
In addition, the length direction of described sunk area can perpendicular to the direction at center to the center in described the moon portion at quarter from described sun portion at quarter.
In addition, based on described sunk area, the height of projection of side close with described incidence surface in described sun portion at quarter can be higher than the height of projection away from the side of described incidence surface in described sun portion at quarter.
In addition, described reflective graphics comprises further, the ring-type outer part of the outer projection around described the moon portion at quarter and to described reflecting surface when looking up from the side vertical with reflecting surface.
Below, the display (1000) according to the embodiment of the present invention will be described.Wherein, described display (1000) refers to, comprise various can the display (1000) of output image as all concepts of LCD display, PDP display, OLED display etc., should make explanations with generalized way.Then, for ease of explanation below, the explanation below mainly carrying out centered by liquid crystal display (1000).
Fig. 1 is the exploded perspective view of the display (1000) according to the embodiment of the present invention, and Fig. 2 is the sectional view of the display (1000) according to the embodiment of the present invention.
As illustrated in fig. 1 and 2, display (1000) can comprise housing (1200), display panel (1400) and backlight module (1600).
Housing (1200) is for by holding display panel (1400) and backlight module (1600) therein and making display panel (1400) and backlight module (1600) from external impact.In addition, housing (1200) has display panel (1400) and backlight module (1600) can be allowed to carry out the function integrated.
Housing (1200) can comprise box top (1220), guide frame (1240) and lid bottom (1260).Box top (1220) and lid bottom (1260) combine the front and back covering display (1000) respectively, and guide frame (1240) is then installed between both.This guide frame (1240) is fixed display panel (1400) together with the frame of box top (1220), also lightguide plate fixing (2000) and otpical leaf (1620) together with lid bottom (1260).
Display panel (1400) shows image by utilizing the light provided by backlight module (1600).
Display panel (1400) can comprise two transparency carriers and be contained in the liquid crystal layer (1420) between these two transparency carriers.Wherein, transparency carrier can be color filter (1460) and thin film transistor (TFT) (TFT) (1440) respectively.When the grid line (gateline) and data line (dataline) that pass through thin film transistor (TFT) (1440) apply electric signal to liquid crystal layer (1420), liquid crystal arrangement can change, thus the light select pool property in units of pixel allowing backlight module (1600) penetrate carry out through, those through light catch color through color filter (1460), thus output image.Wherein, thin film transistor (TFT) (1440) can pass through printed circuit board (PCB) (PCB, not shown) with cover the panel driving portion (not shown) such as brilliant film (COF:ChipOnFilm) or thin-film package (TCP:TapeCarrierPackage) and carry out electric coupling, thus reception control signal.
Backlight module (1600) can provide light to the rear of display panel (1400) and allow display panel (1400) output image.
Backlight module (1600) can comprise optical thin film (1620), array of source (1640), light guide plate (2000) and reflecting plate (1680).
Array of source (1640) can comprise for luminescence light source (1642) and the light source substrate (1644) of light source (1642) is set.As light source (1642), cold-cathode fluorescence lamp (CCFL:ColdCathodeFluorescentLamp), external electrode fluorescent lamp (EEFL:ExternalElectrodeFluorescentLamp) or light emitting diode (LED:LightEmittingDiode) etc. can be used.When described array of source (1640) is for side-light backlight module (1600), array of source (1640) is set at the edge of display (1000) and makes light source (1642) towards side, to make light can from the incident sideways of light guide plate (2000).When described array of source (1640) is for down straight aphototropism mode set (1600), array of source (1640) is located at lid bottom (1260), exports light to make light source (1642) towards display panel (1400) rear.Now, light source substrate (1644) can be located at lid bottom (1260), maybe can omit light source substrate (1644) and light source (1642) is directly arranged on lid bottom (1260).
Light guide plate (2000) is established in opposite directions in backlight module (1600), with the rear of display panel (1400).The light directed toward display panel (1400) that described light guide plate (2000) can will export from light source (1642) to side.In addition, figure is formed respectively in the side of the above and below of light guide plate (2000) and light source (1642), to improve the homogeneity of light, as improved brightness or improving focus etc.Material as light guide plate (2000) can use PMMA material (PMMA:PolyMethlyMethacrylate) or MS, MMA, or uses the material of glass etc.Below, light guide plate (2000) can be described in more detail.In addition, during as utilized down straight aphototropism mode set (1600), the diffuser plate that can be equipped with diffusing light replaces the light guide plate (2000) for leaded light.
Optical thin film (1620) is located at the rear of display panel (1400) and establishes in opposite directions with display panel (1400), when being equipped with light guide plate (2000), optical thin film (1620) can be arranged between display panel (1400) and light guide plate (2000).The example of optical thin film (1620) has, diffusion sheet (1624) or prismatic lens (1622).Diffusion sheet (1624) can allow the light exported from light guide plate (2000) or diffuser plate evenly spread, thus improve the homogeneity of light output distribution, and can alleviate or prevent the generation of light and shade (dark/bright) pattern as not Ah (Moire) phenomenon or focus.Opticpath can be adjusted to the direction perpendicular to display panel (1400) by prismatic lens (1622).Forwards can divide through the light of light guide plate (2000) or diffusion sheet (1624) and scatter, and prismatic lens (1622) can make these light disperseed towards display panel (1400) vertical output, thus improve brightness and the visual angle of display (1000).According to an embodiment, as illustrated in fig. 1 and 2, as optical thin film (1620), can from display panel (1400) mutually nearby place vertical prism sheets (1622a), horizon prism sheet (1622b) and diffusion sheet (1624) one by one.But the order of putting of these optical thin films (1620) is not limited only to this.In other words, the part in optical thin film (1620) can be omitted or part arranges (e.g., can arrange the diffusion sheet (1624) of more than two or two) with the form of multiple, suitably changes again or as required.
Reflecting plate (1680) Pasting is in lid bottom (1260).Described reflecting plate (1680) can reflect to display panel (1400) light penetrated backward in the light that those light sources (1642) export.Described reflecting plate (1680) can improve the display brightness of light guide plate (2000) and diffuser plate on the whole.
Below, by the more light guide plate (2000) explained according to the embodiment of the present invention.
Fig. 3 is the oblique view of the light guide plate (2000) according to the embodiment of the present invention, Fig. 4 is the back view with the light guide plate (2000) of uniform reflective graphics (2200) density according to the embodiment of the present invention, Fig. 5 is the back view with the light guide plate (2000) of uneven reflective graphics (2200) density according to the embodiment of the present invention, Fig. 6 is the sectional view of the light guide plate (2000) according to the embodiment of the present invention, Fig. 7 is the oblique view having the light guide plate (2000) of figure on incidence surface (2060) according to the embodiment of the present invention, and Fig. 8 is the oblique view having the light guide plate (2000) of figure on exiting surface (2020) according to the embodiment of the present invention.
As shown in Fig. 3 ~ 8, tabular light guide plate (2000) can be provided.Now, light guide plate (2000) has a pair cylinder and connects the side of these two cylinders.In a pair cylinder, close with display panel (1400) is the exiting surface (2020) exporting light to display panel (1400) above, and its back side is the reflecting surface (2040) for reflected light.In addition, at least one side in the middle of side will be established in opposite directions with light source (1642), and becomes the incidence surface (2060) receiving incident light.Usually, display (1000) has square screen, and therefore light guide plate (2000) also correspondingly has square platy structure.As light guide plate (2000) for square platy structure time, any surface in four sides or from up and down in opposite directions and a pair side of establishing or a pair side of establishing in opposite directions from left and right can become incidence surface (2060).In addition, in figure 3, although light guide plate (2000) is illustrated as have certain thickness flat board, this should not be only limitted to.According to an embodiment, in order to improve light inlet rate, can take in light guide plate (2000) with light source (1642) in opposite directions and the adjacent domain of the side of establishing has thicker shape than other regions.
Described light guide plate (2000) receives the light penetrated by light source (1642) by incidence surface (2060), then in light guide plate (2000), carry out leaded light, then by exiting surface (2020), these light is exported with area source (1642) form.Reflecting surface (2040) can play the effect of reflecting the light spilt from light guide plate (2000) back side to exiting surface (2020).Incidence surface (2060), exiting surface (2020) and reflecting surface (2040) can form figure respectively, to be used for effectively carrying out light inlet, bright dipping and reflected light.Especially, reflecting surface (2040) can form reflective graphics (2200), to be used for reflection from light guide plate (2000) back side, namely from the light that reflecting surface (2040) spills.
Reflecting surface (2040) can be formed multiple reflective graphics (2200).Now, as shown in Figure 4, reflecting surface (2040) can form the reflective graphics (2200) of even density, or as shown in Figure 5, the reflective graphics (2200) of Density inhomogeneity can be formed.Especially, when being applied to giant-screen, may there is luminance difference in the region nearer with the incidence surface (2060) of light guide plate (2000) and region far away.Therefore, with compared with the region close to incidence surface (2060), form denser reflective graphics (2200) in region far away with it, thus reduce described luminance difference.Wherein, the density of reflective graphics (2200) refers to, the definition that the coverage rate shared by reflective graphics (2200) in reflecting surface (2040), the size of reflective graphics (2200), the spacing etc. of reflective graphics (2200) are made.
Described reflective graphics (2200) is formed by utilizing stencil or laser-etching process, sedimentation, compacting (pressing) method, roller punching press (rollstamping) method etc.By these technique, reflective graphics (2200) can be formed as specific shape, effectively can reflect or reflect those light released from light guide plate (2000) back side to exiting surface (2020).In aftermentioned, reflective graphics (2200) will be described in more detail.
In addition, the incidence surface (2060) of light guide plate (2000) forms zigzag pattern (2400), to improve Light distribation angle from the incident light of light source (1642) and enhanced diffustion effect.As shown in Figure 7, zigzag pattern (2400) mainly from upper and lower to the sun portion at quarter extended out with cloudy portion at quarter repeated arrangement on the Width along incidence surface (2060), and is formed on incidence surface (2060).In addition, the exiting surface (2020) of light guide plate (2000) can form light guiding graphics (2600), with will by the incident photoconduction of incidence surface (2060) in all regions of light guide plate (2000).Light guiding graphics (2600) repeats to be formed at exiting surface (2020) above to be made it to extend perpendicular to incidence surface (2060).As shown in Figure 8, light guiding graphics (2600) can be convex-concave pattern, or is formed the form of triangle or square prism patterns.
Light guide plate (2000) can comprise above-mentioned zigzag pattern (2400) or light guiding graphics (2600), and reflective graphics (2200).As required, light guide plate (2000) can form zigzag pattern (2400), light guiding graphics (2600) and reflective graphics (2200) simultaneously.
Below, the reflective graphics (2200) according to the embodiment of the present invention will be described.
Reflective graphics (2200) can be formed as given shape according to raised or sunken on reflecting surface (2040), thus can reflect those light for spilling from light guide plate (2000) back side.Reflected light like this as a result, have increase due to the amount of the light exported by the exiting surface (2020) of light guide plate (2000), thus improve the brightness of display (1000).
In the present invention, substantially can provide with the reflective graphics of site graphic form (2200).When looking up from the side vertical with reflecting surface (2040), reflective graphics (2200) can to have on reflecting surface (2040) on the whole with the region of circular protrusions, around this region and the position of depression and around the region of again caving in and protruding region.
Reflective graphics (2200) formed mainly through roller pressing or pressing.Particularly, depressed area is through roller punching press or pressing cuts out reflecting surface (2040) and is formed, and boss is that described depressed area is pushed to around and is formed.Now, by roller pressing or the pressing of hot pressing mode, effectively patterning process can be carried out.
Described reflective graphics (2200) can reflect on respective region, reflect or scattering those from incidence surface (2060) the incident and light penetrated to reflecting surface (2040) or reflected and the light penetrated to reflecting surface (2040) at exiting surface (2020), thus effectively can carry out the reflection of light.Particularly, reflective graphics (2200) once can carry out to property reflecting on the lug boss of periphery, scattering, diffusion and reflection ray, then again these light are reflected by the lug boss at depressed part and center, scattering, diffusion and reflection.Especially, peripheral lug boss has the function of the light being incident in reflective graphics (2200) being carried out to disposable scattering, thus can improve the brightness uniformity on exiting surface (2020) comprehensively.
Below, will illustrate according to the first embodiment in the various shapes of the reflective graphics (2200) of the embodiment of the present invention.
Fig. 9 is the oblique view of the first embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 10 is the planimetric map of the first embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 11 is the sectional view of the first embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As shown in Fig. 9 ~ 11, sun portion at quarter (2220) and cloudy portion at quarter (2240) can be comprised according to the first kind of the reflective graphics (2200) of the embodiment of the present invention.
Sun portion at quarter (2220) is positioned at the center of reflective graphics (2200), is the part of the basal plane outwardly convex than reflecting surface (2040).Wherein, when looking up from the side perpendicular to (2040), reflecting surface can be formed as round-shaped in sun portion at quarter (2220).Described sun portion at quarter (2220) has semi-spherical shape and projection on the whole.
Cloudy portion at quarter (2240), around sun portion at quarter (2220), is the part caved in inward than the basal plane of reflecting surface (2040).
When looking up from the side vertical with reflecting surface (2040), cloudy portion at quarter (2240) can be formed as annular shape.Now, the external diameter of cloudy portion at quarter (2240) can be formed as round-shaped, though can not become perfect circle, but can be formed as the various shapes such as tool circle wrinkly, ellipse.And the Ring current distribution of cloudy portion at the quarter (2240) of shape can be not identical with the center of the circle forming sun portion at quarter (2220).That is based on sun portion at quarter (2220), cloudy portion at quarter (2240) can be amesiality.Now, because the moon portion at quarter (2240) is not identical with the center of sun portion at quarter (2220), therefore from the external diameter in the moon portion at quarter (2240) to formed sun portion at quarter (2220) circle center between spacing be not fixing.Such as, the external diameter from the moon portion at quarter (2240) on the direction that the light of incidence is perpendicular to formed sun portion at quarter (2220) circle center between spacing can be the widest, or also can the external diameter from the moon portion at quarter (2240) on the direction being parallel to incident light to formed sun portion at quarter (2220) circle center between spacing the widest.In addition, the whole annular in the moon portion at quarter (2240) in the first kind of reflective graphics (2200) caves in the identical degree of depth.
Below, will illustrate according to the second embodiment in the various shapes of the reflective graphics (2200) of the embodiment of the present invention.
Figure 12 is the oblique view of the second embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 13 is the planimetric map of the second embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 14 is the sectional view of the second embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As shown in Figure 12 ~ 14, similar to the first kind according to the Second Type of the reflective graphics (2200) of the embodiment of the present invention, sun portion at quarter (2220) and cloudy portion at quarter (2240) can be comprised.But the reflecting surface (2040) in the first kind falls at a certain distance, and the cup depth in the moon portion at quarter (2240) in Second Type can be different.The shape in the sun portion at quarter (2220) in the reflective graphics (2200) of Second Type is similar to the shape in the sun portion at quarter (2220) in the first kind of reflective graphics (2200) on the whole, therefore omits the explanation to this.
In the reflective graphics (2200) of Second Type, cloudy portion at quarter (2240) can comprise the first cloudy region at quarter (2242) and the second cloudy region at quarter (2244), wherein, on the cross section in the direction perpendicular to reflecting surface (2040), first cloudy region (2242) of carving can be from the wider region of the spacing between the external diameter in the portion at Zhiyin quarter, center (2240) in sun portion at quarter (2220), and the second cloudy region at quarter (2244) can be from the narrower region of the spacing between the external diameter in the portion at Zhiyin quarter, center (2240) in sun portion at quarter (2220).
In the reflective graphics (2200) of Second Type, the first cloudy cup depth carving region (2242) can be darker than the cup depth of second the moon region at quarter (2244).Therefore, from the first cloudy region (2242) of carving when second the moon carves region (2244), described cup depth can shoal.
Below, will illustrate according to the 3rd embodiment in the various shapes of the reflective graphics (2200) of the embodiment of the present invention.
Figure 15 is the oblique view of the 3rd embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 16 is the planimetric map of the 3rd embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 17 is the sectional view of the 3rd embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As seen in figs. 15-17, similar to the first kind according to the 3rd type of the reflective graphics (2200) of the embodiment of the present invention, sun portion at quarter (2220) and cloudy portion at quarter (2240) can be comprised.But, the sun portion at quarter (2220) in the first kind does not form sunk area (2222), and sun portion at quarter (2220) in the 3rd type can comprise sunk area (2222).The shape in the moon portion at quarter (2240) in the reflective graphics (2200) of the 3rd type is similar to the shape in the moon portion at quarter (2240) in the first kind of reflective graphics (2200) on the whole, therefore omits the explanation to this.
In the reflective graphics (2200) of the 3rd type, sun portion at quarter (2220) comprises the sunk area (2222) caved in inward from its center further.
Sunk area (2222) is that the central part of the hemispherical surface of increase that highly has from reflective graphics (2200) of sun portion at quarter (2220) carries out caving in and formed.
When looking up from the side perpendicular to reflecting surface (2040), described sunk area (2222) can be formed as elliptical shape.But sunk area (2222) is not to form elliptical shape, as long as have the shape of major axis and minor axis, is just not particularly limited.Such as, sunk area (2222) can be formed as elliptical shape wrinkly or the various shapes of the shape with elongated hole cave etc.In addition, from the border of sunk area (2222), from reflective graphics (2200) center more close to, the degree of depth caved in is darker.
Below, will illustrate according to the 4th embodiment in the various shapes of the reflective graphics (2200) of the embodiment of the present invention.
Figure 18 is the oblique view of the 4th embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 19 is the planimetric map of the 4th embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 20 is the sectional view of the 4th embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As shown in Figure 18 ~ 20, the 4th type of reflective graphics (2200) can be similar to the 3rd type, can comprise sun portion at quarter (2220) and cloudy portion at quarter (2240).But the moon portion at quarter (2240) in the 3rd type is sunken with certain depth, and the cup depth in the moon portion at quarter (2240) in the 4th type is different.In reflective graphics (2200) in the 4th type, the shape of sun portion at quarter (2220) is similar to the shape in the 4th type middle-jiao yang, function of the spleen and stomach portion at quarter (2220) of reflective graphics (2200) on the whole, therefore omits the explanation to this.
In reflective graphics (2200) in the 4th type, cloudy portion at quarter (2240) can comprise first relatively dark the moon of its cup depth and carve region (2242) and its cup depth the second cloudy region at quarter (2244) that cloudy region at quarter (2242) is shallow than first.
In reflective graphics (2200) in the 4th type, cloudy portion at quarter (2240) can comprise the first cloudy region at quarter (2242) and the second cloudy region at quarter (2244), on the cross section in the direction perpendicular to reflecting surface (2040), the region of the side that the spacing between the external diameter in the portion at Zhiyin quarter, center (2240) in sun portion at quarter (2220) is wider can be first cloudyly carve region (2242), and the region of the narrower side of spacing between the external diameter in the portion at Zhiyin quarter, center (2240) in sun portion at quarter (2220) can be second cloudyly carve region (2244).
In reflective graphics (2200) in the 4th type, the first cloudy cup depth carving region (2242) can be darker than the cup depth of second the moon region at quarter (2244).Therefore, from the first cloudy region (2242) of carving when second the moon carves region (2244), described cup depth can shoal.
Below, will illustrate according to the 5th embodiment in the various shapes of the reflective graphics (2200) of the embodiment of the present invention.
Figure 21 is the oblique view of the 5th embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 22 is the planimetric map of the 5th embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 23 is the sectional view of the 5th embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As shown in Figure 21 ~ 23, similar to the 4th type according to the 5th type of the reflective graphics (2200) of the embodiment of the present invention, portion at positive quarter (2220) and cloudy portion at quarter (2240) can be had.But, can to comprise in the 5th type around the moon portion at quarter (2240) and to the outer part (2260) of the outer projection of reflecting surface (2040). in the reflective graphics (2200) of the 5th type, sun portion at quarter (2220) is similar with cloudy portion at quarter (2240) to the sun portion at quarter (2220) in the 4th type of reflective graphics (2200) on the whole with the shape of cloudy portion at quarter (2240), therefore omits the explanation to this.
In reflective graphics (2200) in the 4th type, outer part (2260) is established around the moon portion at quarter (2240), is the part of the basal plane outwardly convex than reflecting surface (2040).Wherein, when looking up from the side vertical with reflecting surface (2040), outer part (2260) can be formed as annular shape.The Ring current distribution forming outer part (2260) can overlap with the Ring current distribution forming cloudy portion at quarter (2240).
In the reflective graphics (2200) of the 5th type, outer part (2260) within it footpath place (border be connected with the moon portion at quarter (2240)) has the height identical with the basal plane of reflecting surface (2040), and within certain distance from described inner radius, from internal diameter more away from, described height also can increase, and finally reaches maximum height, and after reaching maximum height, height can reduce gradually, finally reaches the height identical with the basal plane of reflecting surface (2040) and forms external diameter.Now, in outer part (2260), the degree of tilt of its inner radius is larger than the degree of tilt of its outer radius.The incident light in refraction, scattering, reflection relative broad range can be easy to the surface treated outer part of described curved surface (2260).Especially, outer part (2260) is arranged in the outermost of reflective graphics (2200), and once scattering is carried out to the light inciding reflective graphics (2200), those forwards spread after being scattered by the light that reflective graphics (2200) reflects, and from exiting surface (2020) injection, thus the raising of brightness uniformity is made a significant contribution.
In addition, when looking up from the side vertical with reflecting surface (2040), outer part (2260) in the 5th type of reflective graphics (2200) is formed as tubular shape, and the Ring current distribution of the Ring current distribution and cloudy portion at the quarter (2240) of formation that form outer part (2260) is without the need to identical.The shape of the outer part (2260) of formation like this is owing to being asymmetrical, and its optical characteristics has anisotropy and non-isotropy.Particularly, thickness is thick, maximum height is high side has the effect of stronger light scattering than the side in direction in contrast.And compared with the side that, maximum height thick with thickness is higher, the side in direction provides better visual angle in contrast.Therefore, by utilizing anisotropic optical characteristics, brightness uniformity or the visual angle of display (1000) can be improved.
Figure 24 is the sectional view with the light guide plate of asymmetrical reflective graphics according to the embodiment of the present invention.
As shown in figure 24, reflecting surface (2040) can form multiple reflective graphics (2200).In the reflective graphics (2200) of the 5th type, comparatively dark and first of wider width the cloudy region (2242) of carving of cup depth is formed on the side of incidence surface (2060).Therefore, in a reflective graphics (2200), from incidence surface (2060) more away from, the cup depth of cloudy portion at quarter (2240) is more shallow.
Usually, the light entered in reflective graphics (2200) mainly enters reflective graphics (2200) from incidence surface (2060), therefore by the region that the cup depth of arrangement cloudy portion at quarter (2240) on the direction of light incidence is large, thus the effect of the strengthening light diffusion that (2240) have cloudy portion at quarter and scattering to greatest extent.
In addition, in display (1000), horizontal visual angle is play a part larger than vertical visual angle, and therefore when watching display (1000), the region that the maximum height in sun portion at quarter (2220) is higher is lined up vertically, thus prevents the reduction at visual angle.Further, visual angle, below and visual angle, top which kind of visual angle central first weighed in vertical visual angle is more important, above or below display (1000), then arrange the region of maximum Gao Genggao in sun portion at quarter (2220).
In addition, according to circumstances in order to realize brightness uniformity and ensure visual angle simultaneously, optical arrays (1640) can be positioned over below, and the part making positive portion at quarter (2220) larger when forming reflective graphics (2200) downward, thus brightness uniformity can be realized simultaneously and ensure visual angle.
In addition, when there are sunk area (2222), the maximum height based on sun portion at quarter (2220) both sides of sunk area (2222) is not identical.Now, also higher in the maximum height in the sun portion at quarter (2220) of the darker side of the degree of depth in the moon portion at quarter (2240).Now, when the side that maximum height in sun portion at quarter (2220) is higher is established near incidence surface (2060), there is compared with time lower with height of projection the effect of stronger light scattering.Therefore, the brightness uniformity of display (1000) or visual angle can be made to obtain modification.
In addition, the major axis of sunk area (2222) can be perpendicular with the line segment at the center being connected sun portion at quarter and (2220) and cloudy portion at quarter (2240).
In the middle of reflective graphics (2200) distance in vertical direction (absolute value of height or height) of the described embodiment of the present invention, the maximum height of cloudy portion at quarter (2240) is maximum, sun portion at quarter (2220) ranked second position, and the maximum height of outer part (2260) is minimum.Particularly, the height of sun portion at quarter (2220) is about 1.2 ~ 8 times of the height of outer part (2260), and the degree of depth of cloudy portion at quarter (2240) is about 2 ~ 14 times of the height of outer part (2260).And the diameter forming the ring of cloudy portion at quarter (2240) can be 1.05 ~ 2 times of the diameter of a circle of formation sun portion at quarter (2220).
In addition, in reflective graphics (2200), sun portion (2220) diameter at quarter accounts for about 60 ~ 85% of overall diameter, and the moon portion (2240) diameter at quarter accounts for about 80 ~ 98% of overall diameter, and outer part (2260) diameter accounts for about 85 ~ 100% of overall diameter.
According to an embodiment, by roller Sheet Metal Forming Technology, reflective graphics (2200) can form the maximum height with 1 ~ 7, (radius is the distance between position when highly reaching the height of the basal plane of reflecting surface (2040) from the center of reflective graphics (2200) to it to the diameter of 35 ~ 55, 2 times of i.e. this radius) sun portion at quarter (2220), there is the depth capacity of 2 ~ 13, the moon portion at quarter (2240) of the external diameter (2 times of the distance between position when highly reaching the height of the basal plane of reflecting surface (2040) from the center of reflective graphics (2200) to it) of 40 ~ 65 and have 0.5 ~ 5 maximum height, the outer part (2260) of the external diameter (2 times of the distance between position when highly reaching the height of the basal plane of reflecting surface (2040) from the center of reflective graphics (2200) to it) of 40 ~ 70.
In addition, when reflective graphics (2200) is formed as curved surface, for the pitch angle of inclining of each several part, the pitch angle that cloudy portion at quarter (2240) connects the position of outer part (2260) is maximum, the pitch angle that sun portion at quarter (2220) connects the position of cloudy portion at quarter (2240) occupies the second, and the pitch angle that outer part (2260) connects the position of reflecting surface (2040) is minimum.
In addition, in above-mentioned accompanying drawing, reflective graphics (2200) though surface be illustrated as smooth, but the surface of reflective graphics (2200) can have certain roughness.Especially, cloudy portion at quarter (2240) and outer part (2260) all have the roughness of certain value or more.
It is to be noted, however, that the size of above-mentioned reflective graphics (2200) can not be limited in above-mentioned height, the degree of depth, diameter, degree of tilt, roughness etc., can suitably change as required.
All reflective graphics (2200) on described reflecting surface (2040) can be formed size identical in fact, or as required with the difference at the position of reflecting surface (2040), the reflective graphics (2200) of different size can be formed.Such as, when all reflective graphics (2200) are formed same size, owing to there is advantage in technique, thus production cost etc. can be reduced.Example has in contrast to this, reflective graphics (2200) is adjusted to less with incidence surface (2060) its diameter nearlyer, thus can improves the brightness uniformity on the exiting surface (2020) of light guide plate (2000) on the whole.
As mentioned above, the preferred embodiments of the present invention are only and illustrate and disclosing of making, those skilled in the art can carry out various amendment, change and interpolation under the condition not departing from spirit of the present invention and scope, and this amendment, change and interpolation should be considered as falling in the scope of appended claim.

Claims (20)

1. a light guide plate, it comprises:
Exiting surface, it is for outwards exporting light;
Reflecting surface, it is positioned at the back side of described exiting surface;
Incidence surface, its at least one side being arranged in the side connecting described exiting surface and reflecting surface also receives the light of the incidence by light source irradiation; With
Reflective graphics, around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface when it to have when looking up from the side perpendicular to described reflecting surface to the circle sun portion at quarter of the outer projection of described reflecting surface and looks up from the side perpendicular to described reflecting surface
Wherein, the center in described sun portion at quarter is not identical with the center in described the moon portion at quarter.
2. light guide plate according to claim 1, is characterized in that, compared with the center in described sun portion at quarter, described cloudy quarter portion center from described incidence surface more close to.
3. light guide plate according to claim 1, is characterized in that, centered by described sun portion at quarter, in described the moon portion at quarter, the cup depth of side is not identical with the cup depth of opposite side.
4. light guide plate according to claim 3, is characterized in that, centered by described sun portion at quarter, the cup depth of side close with described incidence surface in described the moon portion at quarter is darker.
5. light guide plate according to claim 1, is characterized in that, the external diameter in described the moon portion at quarter is 1.05 ~ 1.3 times of the external diameter in described sun portion at quarter.
6. light guide plate according to claim 1, is characterized in that, the sunk area that the direction that described sun portion at quarter has past described exiting surface is sunken.
7. light guide plate according to claim 6, is characterized in that, the length direction of described sunk area can perpendicular to the direction at center to the center in described the moon portion at quarter from described sun portion at quarter.
8. light guide plate according to claim 6, is characterized in that, when seeing from below, in fact described sunk area forms elliptical shape.
9. light guide plate according to claim 6, is characterized in that, based on described sunk area, in described sun portion at quarter, the height of projection of side is not identical with the height of projection of opposite side.
10. light guide plate according to claim 6, is characterized in that, based on described sunk area, the height of projection of side close with described incidence surface in described sun portion at quarter is higher than the height of projection away from the side of described incidence surface.
11. light guide plate according to claim 1, is characterized in that, described reflective graphics comprises further, the ring-type outer part of the outer projection around described the moon portion at quarter and to described reflecting surface when looking up from the side vertical with reflecting surface.
12. 1 kinds of backlight modules, it comprises:
For irradiating the light source of light; With
Light guide plate,
Described light guide plate has incidence surface, exiting surface, reflecting surface and reflective graphics, wherein said incidence surface and described light source thirty years of age and the wherein light that irradiates of incident light source in opposite directions, described exiting surface is perpendicular to described incidence surface and incident light outwards can be exported, described reflecting surface is positioned at the back side of described exiting surface, and reflective graphics is had on described reflecting surface
Described reflective graphics comprises, around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface when looking up from the side that the circle of described reflecting surface projection sun portion at quarter is vertical with from described reflecting surface when looking up from the side that described reflecting surface is vertical, and
The center in described sun portion at quarter is not identical with the center in described the moon portion at quarter.
13. backlight modules according to claim 12, is characterized in that, compared with the center in described sun portion at quarter, described cloudy quarter portion center from described incidence surface more close to.
14. backlight modules according to claim 12, is characterized in that, centered by described sun portion at quarter, in described the moon portion at quarter, the cup depth of side is not identical with the cup depth of opposite side.
15. backlight modules according to claim 12, is characterized in that, centered by described sun portion at quarter, the cup depth of side close with described incidence surface in described the moon portion at quarter is darker.
16. backlight modules according to claim 12, is characterized in that, the external diameter in described the moon portion at quarter is 1.05 ~ 1.3 times of the external diameter in described sun portion at quarter.
17. backlight modules according to claim 12, is characterized in that, the sunk area that the direction that described sun portion at quarter has past described exiting surface is sunken.
18. backlight modules according to claim 12, is characterized in that, the length direction of described sunk area can perpendicular to the direction at center to the center in described the moon portion at quarter from described sun portion at quarter.
19. backlight modules according to claim 17, is characterized in that, based on described sunk area, the height of projection of side close with described incidence surface in described sun portion at quarter is higher than the height of projection away from the side of described incidence surface.
20. backlight modules according to claim 12, is characterized in that, described reflective graphics comprises further, the ring-type outer part of the outer projection around described the moon portion at quarter and to described reflecting surface when looking up from the side vertical with reflecting surface.
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KR20160022217A (en) 2016-02-29
KR20160022221A (en) 2016-02-29

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