CN105572787A - 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 PDFInfo
- Publication number
- CN105572787A CN105572787A CN201510506647.6A CN201510506647A CN105572787A CN 105572787 A CN105572787 A CN 105572787A CN 201510506647 A CN201510506647 A CN 201510506647A CN 105572787 A CN105572787 A CN 105572787A
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- Prior art keywords
- reflecting surface
- quarter
- guide plate
- light guide
- sunk area
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—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
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- 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
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- 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
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- 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
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- 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 invention relates to a light guide plate, a backlight unit and a display device including the same. The present invention relates to a light guide plate 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
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, because display product is outstanding day by day as the value of interior decoration article, the proportion in product appearance in display industry with 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 the paces immediately following this trend, active research is with the diffusion sheet reducing about 3 ~ 5 that display panel rear is loaded with to greatest extent, but such display product may exist following problem, as increased the weight of focus due to the light diffusibleness be originally responsible for by diffusion sheet cannot be ensured.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 light guide plate, its backlight module and the display improved.
Another technical matters of the present invention is, the light guide plate providing a kind of focus to be inhibited, its backlight module 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, it has to the sun portion at quarter of the outer projection of described reflecting surface with around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface, wherein, described sun portion at quarter has sunk area.
In addition, 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.Wherein, 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, described sun portion at quarter has sunk area.
Beneficial effect
According to the present invention, make light generation scattering according to depressed part, 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 sectional view with the light guide plate of asymmetrical reflective graphics according to the embodiment of the present invention.
Figure 16 is the oblique view of the 3rd embodiment of reflective graphics according to the embodiment of the present invention.
Figure 17 is the planimetric map of the 3rd embodiment of reflective graphics according to the embodiment of the present invention.
Figure 18 is the sectional view of the 3rd embodiment of reflective graphics according to the embodiment of the present invention.
Figure 19 is the oblique view of the 4th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 20 is the planimetric map of the 4th embodiment of reflective graphics according to the embodiment of the present invention.
Figure 21 is the sectional view of the 4th embodiment of reflective graphics according to the embodiment of the present invention.
[explanation of reference numeral]
1000: display
1200: housing
1400: display panel
1600: backlight module
2000: light guide plate
2200: reflective graphics
2220: sun portion at quarter
2222: sunk area
2240: the moon portion at quarter
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, it has to the sun portion at quarter of the outer projection of described reflecting surface with around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface.Wherein, described sun portion at quarter has sunk area.
In addition, in described sunk area, the length ratio be parallel on the direction of described incidence surface can be longer perpendicular to the length on the direction of described incidence surface.
In addition, in described sunk area, the length ratio be parallel on the direction of described incidence surface can be shorter perpendicular to the length on the direction of described incidence surface.
In addition, when looking up from the side perpendicular to described reflecting surface, described sunk area can for having the shape of major axis and minor axis.
In addition, when looking up from the side perpendicular to described reflecting surface, described sunk area is essentially elliptical shape.
In addition, when looking up from the side perpendicular to described reflecting surface, the major axis of described sunk area can by the center in described sun portion at quarter.
In addition, when looking up from the side perpendicular to described reflecting surface, the major axis of described sunk area can be separated by preset distance with the center in described sun portion at quarter.
In addition, respectively with on the cross section of the long axis normal of described reflecting surface and sunk area, the height of projection based on the side, described sun portion at quarter of described sunk area can not be identical with the height of projection of its opposite side.
In addition, the major axis of described sunk area can be parallel to incidence surface, and the higher side of described height of projection is close with described incidence surface.
In addition, the major axis of described sunk area can perpendicular to described incidence surface.
In addition, the minimum point of described sunk area is in the position higher than described reflecting surface.
In addition, when looking up from the side perpendicular to reflecting surface, described sunk area can be in fact round-shaped.
In addition, described reflective graphics can have the annular shape around the moon portion at quarter when the side perpendicular to reflecting surface looks up, and may further include the outer part from reflecting surface outwardly convex.
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.Wherein, 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 annular 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, described sun portion at quarter has sunk area.
In addition, in described sunk area, the length ratio be parallel on the direction of described incidence surface can be longer perpendicular to the length on the direction of described incidence surface.
In addition, in described sunk area, the length ratio be parallel on the direction of described incidence surface can be shorter perpendicular to the length on the direction of described incidence surface.
In addition, when looking up from the side perpendicular to described reflecting surface, described sunk area can for having the elliptical shape of major axis and minor axis.
In addition, respectively with on the cross section of the long axis normal of described reflecting surface and sunk area, the height of projection based on the side, described sun portion at quarter of described sunk area can not be identical with the height of projection of its opposite side.
In addition, the major axis of described sunk area can be parallel to incidence surface and the higher side of described height of projection is close with described incidence surface.
In addition, the minimum point of described sunk area is in the position higher than described reflecting surface.
specific embodiment mode
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.But, 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 the unified flat board of thickness, 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, print process 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 have on the whole on reflecting surface (2040) with the position of circular protrusions and around this region and depression position.
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, the sun portion at quarter (2220) at reflective graphics (2200) Neng center and the upper change in the moon portion at quarter (2240) opticpath twice around its periphery, thus improve the brightness uniformity on exiting surface (2020) on the whole.
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, the sunk area (2222) caved in inward can be formed in the center in sun portion at quarter (2220).
When looking up from the side vertical with reflecting surface (2040), the sun portion at quarter (2220) in the first kind of reflective graphics (2200) can be formed round-shaped.In addition, its three-dimensional shape can be semi-spherical shape.That is, sun portion at quarter (2220) following shape can be adopted, namely from its edge (border of meeting with the moon portion at quarter (2240)) wherein the heart close to time, its height can increase.
Sunk area (2222) can be formed at the center of described reflective graphics (2200).The central part on the surface (2224) of the semi-spherical shape that this sunk area (2222) increases highly gradually in reflective graphics (2200) caves in inward and is formed.
When looking up from the side vertical with reflecting surface (2040), described sunk area (2222) is formed as elliptical shape.But described 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, the major axis of sunk area (2222) can by the center of sun portion at quarter (2220).
In addition, from the border of sunk area (2222) towards the center of reflective graphics (2200) near time, the degree of depth of sunk area (2222) can increase gradually.Now, the minimum point of sunk area (2222) can be in the position higher than the basal plane of reflecting surface (2040).In addition, sunk area (2222) central part can form smooth plane.The internal diameter (border be connected with sun portion at quarter (2220)) of cloudy portion at quarter (2240) has the height equal with reflecting surface (2040) basal plane, and within certain distance from described inner radius, from internal diameter more away from, the degree of depth also can increase, finally reach depth capacity, and after reaching depth capacity, along with close external diameter (border be connected with outer part (2260)), the degree of depth can shoal gradually, has identical height cloudy portion at the quarter (2240) of outer radius with the basal plane of reflecting surface (2040).Now, can provide there is the identical par of the degree of depth reaching depth capacity part.In addition, in the moon portion at quarter (2240), the degree of tilt of its inner radius is larger than the degree of tilt of its outer radius.According to an embodiment, during from cross section, cloudy portion at quarter (2240) can form the curved surface of circular arc type, oval arc-shaped, parabolic type etc. and be sunken inward on the basal plane of reflecting surface (2040).The incident light in refraction, scattering, reflection relative broad range can be easy to surface treated cloudy portion at the quarter (2240) of described curved surface.
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, Figure 14 is the sectional view of the second embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 15 is the sectional view of the light guide plate (2000) with asymmetrical 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, middle heart-yang portion at quarter (2220) and cloudy portion at quarter (2240) can be comprised.But in the first kind, sun portion at quarter (2220) is understood symmetrical centered by sunk area (2222) and is formed, and the sun portion at quarter (2220) of Second Type is asymmetrically formed sunk area (2222).The shape in the moon portion at quarter (2240) in the reflective graphics (2200) of Second Type on the whole can be similar to the shape in the moon portion at quarter (2240) in the first kind of reflective graphics (2200), thus omits the explanation to this at this.
In the Second Type of reflective graphics (2200), sun portion at quarter (2220) can be asymmetrically formed concerning sunk area (2222), and visible on cross section as Suo Shi Figure 12 ~ 14, it is highly the highest in one direction, along with reducing highly gradually, it is highly minimum in the opposite direction.Now, the region with relatively high height can become the first elevated regions (2224a), and the region with relatively low height becomes the second elevated regions (2224b).When moving towards the second elevated regions (2224b) gradually from the first elevated regions (2224a), its height can reduce gradually, and becomes minimum at the height of the second elevated regions (2224b).And, in the first elevated regions (2224a) sunk area (2222) and cloudy portion at quarter part that (2240) meet spacing with can be equal with the spacing of the moon part that (2240) meet portion at quarter at the middle sunk area (2222) of the second elevated regions (2224b).
The shape right and wrong of the Second Type of described reflective graphics (2200) are symmetric, thus its optical characteristics does not have isotropy, has anisotropy on the contrary.Particularly, the first elevated regions (2224a) has stronger light scattering effect than the second elevated regions (2224b).In addition, the second elevated regions (2224b) provides than the first elevated regions (2224a) better visual angle.Therefore, by utilizing anisotropic optical characteristics, brightness uniformity or the visual angle of display (1000) can be improved.
In addition, as shown in figure 15, reflecting surface (2040) can form multiple reflective graphics (2200).In the Second Type of reflective graphics (2200), the first elevated regions (2224a) can be formed on incidence surface (2060).Therefore, in a reflective graphics (2200), from incidence surface (2060) more away from, the height of elevated regions (2224) is lower.
The side in sun portion at quarter (2220) highly high in reflective graphics (2200) is arranged on reflecting surface (2040) towards the direction near incidence surface (2060).Usually, the light entered in reflective graphics (2200) mainly enters reflective graphics (2200) from incidence surface (2060), therefore by the higher region of height of arrangement sun portion at quarter (2220) on the direction of light incidence, thus the effect of the light diffusion that (2220) have portion at quarter of strengthening sun 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.
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 16 is the oblique view of the 3rd embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 17 is the planimetric map of the 3rd embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 18 is the sectional view of the 3rd embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As shown in Figure 16 ~ 18, similar to the first kind according to the 3rd type of the reflective graphics (2200) of the embodiment of the present invention, middle heart-yang portion at quarter (2220) and cloudy portion at quarter (2240) can be comprised.But, reflecting surface (2040) in the first kind is upper forms sun portion at quarter (2220) and cloudy portion at quarter (2240), and the reflective graphics (2200) in the 3rd type comprises outer part (2260) further, this outer part (2260) is around the moon portion at quarter (2240) and than the basal plane outwardly convex of reflecting surface (2040).The sun portion at quarter (2220) of the reflective graphics (2200) in the 3rd type is similar with the shape of cloudy portion at quarter (2240) to the sun portion at quarter (2220) in the first kind of reflective graphics (2200) on the whole with the shape of cloudy portion at quarter (2240), therefore omits the explanation to this.
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.Formed outer part (2260) Ring current distribution can with formed sun portion at quarter (2220) circle and is formed the moon portion at quarter (2240) Ring current distribution overlap.
In the 3rd type of reflective graphics (2200), 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.According to an embodiment, during from cross section, outer part (2260) can be formed circular arc type, oval arc-shaped, parabolic type etc. curved surface and from convex the basal plane of reflecting surface (2040).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 3rd type of reflective graphics (2200) forms tubular shape, and the Ring current distribution forming outer part (2260) and the circle forming sun portion at quarter (2220) with form the Ring current distribution of the moon portion at quarter (2240) 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 thicker, maximum height is higher side has the effect of stronger light scattering than the side in direction in contrast.And compared with the side that, maximum height thicker 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.
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 19 is the oblique view of the 4th embodiment of reflective graphics (2200) according to the embodiment of the present invention, Figure 20 is the planimetric map of the 4th embodiment of reflective graphics (2200) according to the embodiment of the present invention, and Figure 21 is the sectional view of the 4th embodiment of reflective graphics (2200) according to the embodiment of the present invention.
As shown in Figure 19 ~ 21, similar to Second Type according to the 4th type of the reflective graphics (2200) of the embodiment of the present invention, middle heart-yang portion at quarter (2220) and cloudy portion at quarter (2240) can be comprised.But, in Second Type, reflecting surface (2040) upper formation sun portion at quarter (2220) and cloudy portion at quarter (2240), and the reflective graphics (2200) in the 4th type comprises outer part (2260) further, this outer part (2260) is around the moon portion at quarter (2240) and than the basal plane outwardly convex of reflecting surface (2040).The sun portion at quarter (2220) of the reflective graphics (2200) in the 4th type is similar with the shape of cloudy portion at quarter (2240) to the sun portion at quarter (2220) in the Second Type of reflective graphics (2200) on the whole with the shape of cloudy portion at quarter (2240), therefore omits the explanation to this.
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.Formed outer part (2260) Ring current distribution can with formed sun portion at quarter (2220) circle and is formed the moon portion at quarter (2240) Ring current distribution overlap.
In the 4th type of reflective graphics (2200), the internal diameter (border be connected with the moon portion at quarter (2240)) of outer part (2260) has the height equal with reflecting surface (2040) basal plane, and within certain distance from described inner radius, from internal diameter more away from, highly also can increase, finally reach maximum height, and after reaching depth capacity, diminish highly gradually, finally reach the height identical with the basal plane of reflecting surface (2040) and form 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.According to an embodiment, during from cross section, outer part (2260) can be formed circular arc type, oval arc-shaped, parabolic type etc. curved surface and from convex the basal plane of reflecting surface (2040).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 4th type of reflective graphics (2200) forms tubular shape, and the Ring current distribution forming outer part (2260) and the circle forming sun portion at quarter (2220) with form the Ring current distribution of the moon portion at quarter (2240) 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 thicker, maximum height is higher side has the effect of stronger light scattering than the side in direction in contrast.And compared with the side that, maximum height thicker 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.
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).In addition, when the sunk area (2222) of sun portion at quarter (2220) is compared with outer part (2260), the height of the minimum point of sunk area (2222) is higher than the height of the peak of outer part (2260).In addition, from the cave in degree of depth of going of the peak in sun portion at quarter (2220) to sunk area (2222) be about 0.8 ~ 5 times of outer part (2260) height.
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.In addition, in reflective graphics (2200), the area of sunk area (2222) accounts for about 20 ~ 40% of the area of sun portion at quarter (2220), and the area in the region namely tilted inward in sun portion at quarter (2220) accounts for about 20 ~ 40% of the area of sun portion at quarter (2220).
According to an embodiment, by roller Sheet Metal Forming Technology, reflective graphics (2200) forms 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), gap between the cup depth formed at sunk area (2222) the i.e. peak of sun portion at quarter (2220) and minimum point is about 0.3 ~ 4, 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, it has to the sun portion at quarter of the outer projection of described reflecting surface with around described sun portion at quarter and toward the ring-type portion at cloudy quarter of the inner recess of described reflecting surface,
Wherein, described sun portion at quarter has sunk area.
2. light guide plate according to claim 1, is characterized in that, in described sunk area, the length ratio be parallel on the direction of described incidence surface is longer perpendicular to the length on the direction of described incidence surface.
3. light guide plate according to claim 1, is characterized in that, in described sunk area, the length ratio be parallel on the direction of described incidence surface is shorter perpendicular to the length on the direction of described incidence surface.
4. light guide plate according to claim 1, is characterized in that, when looking up from the side perpendicular to described reflecting surface, described sunk area is the shape with major axis and minor axis.
5. light guide plate according to claim 4, is characterized in that, when looking up from the side perpendicular to described reflecting surface, described sunk area is essentially elliptical shape.
6. light guide plate according to claim 4, is characterized in that, when looking up from the side perpendicular to described reflecting surface, the major axis of described sunk area can by the center in described sun portion at quarter.
7. light guide plate according to claim 4, is characterized in that, when looking up from the side perpendicular to described reflecting surface, the center in the major axis of described sunk area and described sun portion at quarter is separated by preset distance.
8. light guide plate according to claim 4, is characterized in that, respectively with on the cross section of the long axis normal of described reflecting surface and sunk area, the height of projection based on the side, described sun portion at quarter of described sunk area is not identical with the height of projection of its opposite side.
9. light guide plate according to claim 8, is characterized in that, the longer axis parallel of described sunk area is in incidence surface, and the higher side of described height of projection is close with described incidence surface.
10. light guide plate according to claim 8, is characterized in that, the long axis normal of described sunk area is in described incidence surface.
11. light guide plate according to claim 1, is characterized in that, the minimum point of described sunk area is in the position higher than described reflecting surface.
12. light guide plate according to claim 1, is characterized in that, when looking up from the side perpendicular to reflecting surface, described sunk area is essentially round-shaped.
13. light guide plate according to claim 1, is characterized in that, when looking up from the side perpendicular to reflecting surface, described reflective graphics has the annular shape around the moon portion at quarter, and comprises the outer part from reflecting surface outwardly convex further.
14. 1 kinds of backlight modules, it comprises:
For irradiating the light source of light; With
Light guide plate,
Wherein, described light guide plate has incidence surface, exiting surface, reflecting surface and reflective graphics, described incidence surface and described light source thirty years of age and can incident described incidence surface by the light of 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 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,
Described sun portion at quarter has sunk area.
15. backlight modules according to claim 14, is characterized in that, in described sunk area, the length ratio be parallel on the direction of described incidence surface is longer perpendicular to the length on the direction of described incidence surface.
16. backlight modules according to claim 14, is characterized in that, in described sunk area, the length ratio be parallel on the direction of described incidence surface is shorter perpendicular to the length on the direction of described incidence surface.
17. backlight modules according to claim 14, is characterized in that, when looking up from the side perpendicular to described reflecting surface, described sunk area is the elliptical shape with major axis and minor axis.
18. backlight modules according to claim 17, it is characterized in that, respectively with on the cross section of the long axis normal of described reflecting surface and sunk area, the height of projection based on the side, described sun portion at quarter of described sunk area is not identical with the height of projection of its opposite side.
19. backlight modules according to claim 18, is characterized in that, the longer axis parallel of described sunk area is in incidence surface, and the higher side of described height of projection is close with described incidence surface.
20. backlight modules according to claim 14, is characterized in that, the minimum point of described sunk area is in the position higher than described reflecting surface.
Applications Claiming Priority (4)
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| US201462038723P | 2014-08-18 | 2014-08-18 | |
| US62/038,723 | 2014-08-18 | ||
| KR1020150045733A KR20160022212A (en) | 2014-08-18 | 2015-03-31 | Light guide plate, backlight unit and display device having the same |
| KR10-2015-0045733 | 2015-03-31 |
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| Publication Number | Publication Date |
|---|---|
| CN105572787A true CN105572787A (en) | 2016-05-11 |
| CN105572787B CN105572787B (en) | 2019-01-15 |
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| CN201510506647.6A Active CN105572787B (en) | 2014-08-18 | 2015-08-18 | Light guide plate, backlight module and display including the light guide plate |
| CN201510506593.3A Active CN105572786B (en) | 2014-08-18 | 2015-08-18 | A kind of light guide plate and the backlight module including the light guide plate |
| CN201510506484.1A Active CN105572784B (en) | 2014-08-18 | 2015-08-18 | Light guide plate, backlight module and display including the light guide plate |
| CN201510506581.0A Active CN105572785B (en) | 2014-08-18 | 2015-08-18 | Light guide plate, backlight module and display including the light guide plate |
| CN201510506503.0A Active CN105572963B (en) | 2014-08-18 | 2015-08-18 | A kind of display and its light guide plate |
| CN201510506652.7A Active CN105572788B (en) | 2014-08-18 | 2015-08-18 | A kind of light guide plate, backlight module and display device including the light guide plate |
| CN201510506481.8A Active CN105572783B (en) | 2014-08-18 | 2015-08-18 | A kind of light guide plate, backlight module and display device containing the light guide plate |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510506593.3A Active CN105572786B (en) | 2014-08-18 | 2015-08-18 | A kind of light guide plate and the backlight module including the light guide plate |
| CN201510506484.1A Active CN105572784B (en) | 2014-08-18 | 2015-08-18 | Light guide plate, backlight module and display including the light guide plate |
| CN201510506581.0A Active CN105572785B (en) | 2014-08-18 | 2015-08-18 | Light guide plate, backlight module and display including the light guide plate |
| CN201510506503.0A Active CN105572963B (en) | 2014-08-18 | 2015-08-18 | A kind of display and its light guide plate |
| CN201510506652.7A Active CN105572788B (en) | 2014-08-18 | 2015-08-18 | A kind of light guide plate, backlight module and display device including the light guide plate |
| CN201510506481.8A Active CN105572783B (en) | 2014-08-18 | 2015-08-18 | A kind of light guide plate, backlight module and display device containing the light guide plate |
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| KR (15) | KR20160022211A (en) |
| CN (7) | CN105572787B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105572784B (en) | 2019-01-15 |
| CN105572963A (en) | 2016-05-11 |
| CN105572783A (en) | 2016-05-11 |
| CN105572788A (en) | 2016-05-11 |
| KR20160022220A (en) | 2016-02-29 |
| KR20160022216A (en) | 2016-02-29 |
| KR20160022222A (en) | 2016-02-29 |
| KR20160022221A (en) | 2016-02-29 |
| KR20160022212A (en) | 2016-02-29 |
| CN105572788B (en) | 2019-01-15 |
| KR20160022211A (en) | 2016-02-29 |
| CN105572785B (en) | 2019-01-15 |
| KR20160022219A (en) | 2016-02-29 |
| CN105572785A (en) | 2016-05-11 |
| KR20160022217A (en) | 2016-02-29 |
| CN105572787B (en) | 2019-01-15 |
| CN105572786A (en) | 2016-05-11 |
| CN105572963B (en) | 2019-04-19 |
| CN105572783B (en) | 2019-01-15 |
| KR20160022213A (en) | 2016-02-29 |
| KR20160022215A (en) | 2016-02-29 |
| KR20160022218A (en) | 2016-02-29 |
| KR20160022224A (en) | 2016-02-29 |
| KR20160022223A (en) | 2016-02-29 |
| KR20160022214A (en) | 2016-02-29 |
| CN105572784A (en) | 2016-05-11 |
| KR20160022225A (en) | 2016-02-29 |
| CN105572786B (en) | 2019-01-15 |
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