CN104714269A - Light guide panel, backlight unit and liquid crystal display comprising the same - Google Patents

Light guide panel, backlight unit and liquid crystal display comprising the same Download PDF

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Publication number
CN104714269A
CN104714269A CN201410322776.5A CN201410322776A CN104714269A CN 104714269 A CN104714269 A CN 104714269A CN 201410322776 A CN201410322776 A CN 201410322776A CN 104714269 A CN104714269 A CN 104714269A
Authority
CN
China
Prior art keywords
angle
light guide
guide plate
scattering pattern
dip plane
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.)
Pending
Application number
CN201410322776.5A
Other languages
Chinese (zh)
Inventor
朴世起
河尚佑
刘俊优
李夏英
金裕东
廉东烈
郑承焕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Display Co Ltd
Original Assignee
Samsung Display Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Samsung Display Co Ltd filed Critical Samsung Display Co Ltd
Publication of CN104714269A publication Critical patent/CN104714269A/en
Pending 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
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough 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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened 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
    • G02B6/005—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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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

Abstract

The invention provides a light guide panel, a backlight unit and a liquid crystal display comprising the same. The light guide panel includes a top surface configured to have first and second sides extending in X- and Y-axis directions, respectively, a bottom surface configured to be disposed opposite to the top surface, and includes a base surface, and a plurality of diffusion patterns which is provided to protrude from, or to be recessed into, the base surface, and each of the plurality of diffusion patterns including a first inclined surface which defines a first inclination angle with the base surface and a second inclined surface which adjoins the first inclined surface and defines a second inclination angle with the base surface, and a first side surface and a second side surface configured to be disposed between the top surface and the bottom surface and face each other, where the first inclination angle ranges from about 1.8 degrees to about 5.7 degrees.

Description

Light guide plate, back light unit and liquid crystal display
Technical field
The present invention relates to light guide plate, back light unit (BLU) and comprise the liquid crystal display (LCD) of this BLU, more specifically, relate to light guide plate, the BLU that light can be caused to launch forward and comprise the LCD of this BLU.
Background technology
Liquid crystal display (LCD) comprises the LCD module being connected to external shell.LCD module comprises liquid crystal panel and backlight assembly, the liquid crystal layer that liquid crystal panel has two substrates and is plugged between two substrates, and backlight assembly to be arranged on after liquid crystal panel and to apply light to liquid crystal layer.The transmissivity that liquid crystal panel is provided to its light by adjustment by backlight assembly shows image.
Depend on the position of light source relative to display panel, backlight assembly can be categorized as full run-down type or side light type (edge type).In Staight downward type backlight assembly, light source is arranged on after display panel, and in side light type backlight assembly, light source is arranged on display panel side below.
Side light type backlight assembly needs the light guide plate being used for the light launched by light source to guide towards display panel.Light guide plate changes the path of light thus guides light towards display panel.For LCD, assemble the light launched in all directions and also guide the light assembled to advance forward, namely towards display panel, become important task, thus, carried out the brightness that various trial improves the light launched forward from LCD.
Summary of the invention
One exemplary embodiment of the present invention provides a kind of light guide plate, and it can provide the brightness of excellent forward-emitted light.
One exemplary embodiment of the present invention also provides a kind of back light unit (BLU), and it can provide the brightness of excellent forward-emitted light.
One exemplary embodiment of the present invention also provides a kind of liquid crystal display (LCD), and it can provide the brightness of excellent forward-emitted light.
But, one exemplary embodiment of the present invention be not limited to set forth here those.By referring to the following detailed description of the present invention provided, above and other one exemplary embodiment of the present invention will become more obvious for the those of ordinary skill in field belonging to the present invention.
According to one exemplary embodiment of the present invention, a kind of light guide plate comprises: top surface, has the first side and the second side that extend in X-direction perpendicular to one another and Y direction respectively; Basal surface, is relatively arranged with top surface; And first side surface and the second side surface, to be arranged between top surface and basal surface and facing with each other.Basal surface comprises substrate surface and multiple scattering pattern, and multiple scattering pattern is provided as outstanding from substrate surface or is recessed into substrate surface.Each scattering pattern comprises the first dip plane of limiting the first angle with substrate surface and adjacent first dip plane and limits the second dip plane of the second angle [alpha] with substrate surface.
According to another one exemplary embodiment of the present invention, a kind of BLU comprises light guide plate, and this light guide plate comprises: top surface, has the first side and the second side that extend in X-direction perpendicular to one another and Y direction respectively; Basal surface, is relatively arranged with top surface; And first side surface and the second side surface, to be arranged between top surface and basal surface and facing with each other, wherein basal surface comprises substrate surface and multiple scattering pattern, multiple scattering pattern is provided as outstanding from substrate surface or is recessed into substrate surface, and each scattering pattern comprises the first dip plane and adjacent first dip plane that limit the first angle with substrate surface and limits the second dip plane of the second angle with substrate surface.BLU also comprise arrange near light guide plate the first side surface light source cell and relatively arrange with the top surface of light guide plate and comprise the prismatic lens of multiple prism.
According to another exemplary embodiment of the present invention, LCD comprises BLU and is arranged on the display panel on this BLU.This BLU comprises light guide plate, and this light guide plate comprises: top surface, has and in X-direction perpendicular to one another and Y direction, extends the first side and the second side respectively; Basal surface, is relatively arranged with top surface; And first side surface and the second side surface, to be arranged between top surface and basal surface and facing with each other, wherein basal surface comprises substrate surface and multiple scattering pattern, multiple scattering pattern is provided as outstanding from substrate surface or is recessed into substrate surface, and each scattering pattern comprises the first dip plane and adjacent first dip plane that limit the first angle with substrate surface and limits the second dip plane of the second angle [alpha] with substrate surface.BLU also comprise arrange near light guide plate the first side surface light source cell and relatively arrange with the top surface of light guide plate and comprise the prismatic lens of multiple prism.
According to embodiment, the light launched from light source cell can be guided to advance to forward the front portion of display device, therefore improve the brightness of forward-emitted light.
In addition, BLU and LCD of the lightness properties of the forward-emitted light with improvement can be provided.
Other feature and one exemplary embodiment can become obvious from following detailed description, accompanying drawing and claim.
Accompanying drawing explanation
Describe one exemplary embodiment of the present invention in detail by referring to accompanying drawing, above and other one exemplary embodiment of the present invention and feature will become more obvious, in accompanying drawing:
Fig. 1 is the skeleton view of the one exemplary embodiment according to light guide plate of the present invention;
Fig. 2 is the sectional view of the light guide plate shown in Fig. 1;
Fig. 3 is the upward view of the light guide plate shown in Fig. 1;
Fig. 4 is the partial enlarged drawing of the scattering pattern shown in Fig. 1;
Fig. 5 sectional view that to be the scattering pattern shown in Fig. 4 intercept along the line I-I' of Fig. 4;
Fig. 6 illustrates the first angle (β) and the curve map of relation between the light convergence level measured with halfwidth (FWHM);
Fig. 7 illustrates the first angle (β) and the curve map with the relation between the total light flux of lumen measurement;
Fig. 8 be that the first angle (β) is shown and with unit be the forward-emitted light that candela (Cd) is measured intensity between the curve map of relation;
Fig. 9 is the sectional view of the light guide plate shown in Fig. 1;
Figure 10 is the sectional view of the example one exemplary embodiment of the amendment of the scattering pattern shown in Fig. 5;
Figure 11 is the upward view of another one exemplary embodiment according to light guide plate of the present invention;
Figure 12 is the partial enlarged drawing of the scattering pattern shown in Figure 11;
Figure 13 sectional view that to be the scattering pattern shown in Figure 12 intercept along the line II-II' of Figure 12;
Figure 14 is the sectional view of the one exemplary embodiment of the amendment of the scattering pattern shown in Figure 13;
Figure 15 is the sectional view that the scattering pattern shown in Figure 13 intercepts along Y direction;
Figure 16 is the skeleton view of another one exemplary embodiment according to light guide plate of the present invention;
Figure 17 is the sectional view of the light guide plate shown in Figure 16;
Figure 18 is the upward view of the light guide plate shown in Figure 16;
Figure 19 is the partial enlarged drawing of the scattering pattern shown in Figure 18;
Figure 20 sectional view that to be the scattering pattern shown in Figure 19 intercept along the line III-III' of Figure 19;
Figure 21 is the sectional view of the light guide plate shown in Figure 16;
Figure 22 is the upward view of another one exemplary embodiment according to light guide plate of the present invention;
Figure 23 is the partial enlarged drawing of the scattering pattern shown in Figure 22;
Figure 24 sectional view that to be the scattering pattern shown in Figure 23 intercept along the line IV-IV' of Figure 23;
Figure 25 is the sectional view of the one exemplary embodiment of the amendment of the scattering pattern shown in Figure 24;
Figure 26 is the sectional view that the scattering pattern shown in Figure 25 intercepts along Y direction;
Figure 27 is the skeleton view of the one exemplary embodiment according to back light unit of the present invention (BLU).
Figure 28 is the sectional view of the BLU shown in Figure 27;
Figure 29 is the sectional view of the BLU shown in Figure 27;
Figure 30 be illustrate the first angle, the 3rd angle and measurement the light launched forward from BLU intensity (unit is candela (Cd)) between the curve map of relation;
Figure 31 is the sectional view of the one exemplary embodiment of the amendment of the light guide plate shown in Figure 29;
Figure 32 is the upward view of another one exemplary embodiment according to BLU of the present invention;
Figure 33 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 32;
Figure 34 is the upward view of the one exemplary embodiment of another amendment of the BLU shown in Figure 32;
Figure 35 is the upward view of the one exemplary embodiment of another amendment of the BLU shown in Figure 32;
Figure 36 is the fragmentary, perspective view of another one exemplary embodiment according to BLU of the present invention;
Figure 37 is the fragmentary, perspective view of another one exemplary embodiment according to BLU of the present invention;
Figure 38 is the skeleton view of another one exemplary embodiment according to BLU of the present invention;
Figure 39 is the upward view of the BLU shown in Figure 38;
Figure 40 is the sectional view intercepted along the line V-V' of Figure 39;
Figure 41 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 39;
Figure 42 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 41; And
Figure 43 is the decomposition diagram of the one exemplary embodiment according to liquid crystal display of the present invention (LCD).
Embodiment
By referring to the following the detailed description and the accompanying drawings of one exemplary embodiment, advantages and features of the invention and the method realizing them can be easier to understand.But the present invention can implement with multiple different form, and should not be construed as limited to the embodiment set forth here.But provide these embodiments to make the disclosure thorough and complete, and design of the present invention is fully conveyed to those skilled in the art, the present invention will only be defined by the claims.Identical Reference numeral refers to identical element in whole instructions.
Describe one exemplary embodiment in detail by referring to accompanying drawing, one exemplary embodiment of the present invention and feature and the method for realizing one exemplary embodiment and feature will become obvious.But, the invention is not restricted to disclosed one exemplary embodiment below, but can implement in a variety of manners.The content limited in the description, such as concrete structure and element, be only that specific details is provided to help those of ordinary skill in the art to understand the present invention all sidedly, the present invention is only defined by the claims its scope.
Be used to specify element on another element or be positioned at term on different layers or layer " on " comprise element and be located immediately at the situation that situation on another element or layer and element be positioned on this another element via another element or another element.In whole description of the present invention, identical Reference numeral is used for the identical element in different accompanying drawings.
Although term " first, second " etc. are for describing various composed component, these composed components are not limited by these terms.These terms are only for differentiating a composed component and other composed component.Therefore, in the following description, the first composed component can be the second composed component.
Terminology used here is only the object in order to describe specific embodiment, does not really want to limit.As used herein, clearly state unless context separately has, otherwise singulative " " and " being somebody's turn to do " are all intended to comprise plural form, comprise " at least one "."or" represents "and/or".When used herein, term "and/or" comprises any and all combinations of one or more listed relevant item.Also will understand, term " comprises ", " comprising " and/or " having ", when using in this manual, specify the existence of described feature, region, entirety, step, operation, element and/or assembly, but do not get rid of other features one or more, region, entirety, step, operation, element, the existence of assembly and/or its combination or increase.
In addition, can use here such as D score or " end " and " on " or the relative terms on " top " element and another element relation as shown in drawings are described.To understand, relative terms is intended to contain the different orientation of device except orientation shown in accompanying drawing.Such as, if the device in one of accompanying drawing is turned over, be described to " " element of other element D score sides will other elements " on " side.Therefore, exemplary term D score can contain "up" and "down" two kinds of orientations, depends on the specific orientation of accompanying drawing.Similarly, if the device in one of accompanying drawing is turned over, be described to " " other elements " below " or " below " element will other elements " on ".Therefore, exemplary term " below " or " below " can contain on and under two kinds of orientations.
Consider problematic measurement and the error relevant to the measurement of specified quantitative (namely, the restriction of measuring system), " approximately " or " roughly " comprises described value and represent in the acceptable deviation range of particular value as used herein, as one of ordinary skill in the identified.Such as, " approximately " can represent in one or more standard deviation, or described value ± 30%, 20%, 10%, 5% in.
Unless otherwise defined, the same implication usually understood of all terms used herein (comprising technical term and the scientific terminology) those of ordinary skill all had in field belonging to the disclosure.It will also be understood that, the term defined in such as universaling dictionary should be interpreted as having the consistent implication of implication with them in the linguistic context and the disclosure of association area, and should do not explained with Utopian or excessive formal meaning, limit like this unless clear and definite here.
Here describe one exemplary embodiment with reference to sectional view, these figure are the schematic diagram of idealized embodiments.Thus, the change of the diagram shape caused by such as manufacturing technology and/or tolerance is contingent.Therefore, the embodiments described herein should not be construed as limited to the given shape in shown here region, but comprises by such as manufacturing the form variations caused.Such as, illustrate or be described as smooth region and usually can have coarse and/or nonlinear feature.And the wedge angle illustrated can be rounded.Therefore, region shown in the drawings is schematic in itself, and their shape does not really want the accurate shape that region is shown, does not also really want the scope limiting these claims.
Hereafter with reference to the accompanying drawings one exemplary embodiment is being described.
Fig. 1 is the skeleton view of the light guide plate according to one exemplary embodiment, and Fig. 2 is the sectional view of the light guide plate shown in Fig. 1, and Fig. 3 is the upward view of the light guide plate shown in Fig. 1.
With reference to Fig. 1 and Fig. 3, light guide plate 100 comprises: top surface 110, has the first side and the second side that extend in X-axis perpendicular to one another and Y direction respectively; Basal surface 120, is relatively arranged with top surface 110; And first side surface 130 and the second side surface 140, to be arranged between top surface 110 and basal surface 120 and facing with each other.Basal surface 120 comprises substrate surface 1201 and multiple scattering pattern 300, and multiple scattering pattern 300 is provided as outstanding from substrate surface 1201 or is recessed into substrate surface 1201.Each scattering pattern 300 comprises the first dip plane 310 of limiting the first angle beta with substrate surface 1201 and adjacent first dip plane 310 and limits the second dip plane 320 (with reference to Fig. 4 and Fig. 5) of the second angle [alpha] with substrate surface 1201.
Top surface 110 can extend in the horizontal direction.Top surface 110 is shown in Figure 1 for flat surfaces, but is not limited to the shape shown in Fig. 1.That is, one or more pattern with given shape can be arranged on top surface 110, or top surface 110 can partly tilt, and this will describe later in more detail.
In an exemplary embodiment, top surface 110 can be rectangle.That is, top surface 110 can have four sides, comprises the first side 110a extended in the X-axis direction and the second side 110b extended in the Y-axis direction.Second side 110b can be the tangent line of the first side surface 130.
Basal surface 120 relatively can be arranged with top surface 110.Basal surface 120 can have the shape identical with top surface 110.That is, top surface 110 and basal surface 120 can be parallel to each other, extend in the horizontal direction, have substantially the same shape, and facing with each other.In nonrestrictive one exemplary embodiment, top surface 110 and basal surface 120 can be all rectangles.
First side surface 130 and the second side surface 140 can be arranged between top surface 110 and basal surface 120.The coboundary of the first side surface 130 and the second side surface 140 can adjoin top surface 110, and the lower limb of the first side surface 130 and the second side surface 140 can adjoin basal surface 120.That is, top surface 110 and basal surface 120 can be the base side of cube or rectangular parallelepiped, and the first side surface 130 and the second side surface 140 can be the pair of parallel sides of this cube or rectangular parallelepiped.
At least one in first side surface 130 and the second side surface 140 can be arranged near light source cell 200, and this will describe later in more detail.
First side surface 130 and the second side surface 140 are shown in Figure 1 for has identical width, but can have width different from each other in a further exemplary embodiment.First side surface 130 and the second side surface 140 are shown in Figure 1 for flat surfaces, but can comprise the one or more patterns having and provide given shape thereon.In an exemplary embodiment, the first side surface 130 or the second side surface 140 can partly comprise rugged part.
Basal surface 120 can comprise substrate surface 1201 and one or more scattering pattern 300, and one or more scattering pattern 300 is given prominence to from substrate surface 1201 or is recessed into substrate surface 1201.
Substrate surface 1201 can be flat surfaces and can be for determining that scattering pattern 300 is to provide the basis into projection or depression.
One or more scattering pattern 300 can be provided on basal surface 120.Scattering pattern 300 can be arranged to matrix, but the present invention is not limited thereto.That is, in a further exemplary embodiment, scattering pattern 300 can be distributed on basal surface 120 unevenly.Scattering pattern 300 can have substantially the same size, but the present invention is not limited thereto.That is, in a further exemplary embodiment, scattering pattern 300 can be of different sizes.
Scattering pattern 300 can be provided as outstanding from substrate surface 1201 or is recessed into substrate surface 1201.More specifically, scattering pattern 300 can be outstanding or can up be recessed into reference surface 1201 with in the face of top surface 110 downwards from reference surface 1201.Scattering pattern 300 will describe later in more detail.
The light guide plate 100 comprising top surface 110, basal surface 120, first side surface 130 and the second side surface 140 can comprise transparent material.Term " transparent ", when used herein, can represent the transparency and translucence completely.
Light guide plate 100 can utilize such as polycarbonate (PC) or polymethylmethacrylate (PMMA) and be provided as transparent, but the present invention is not limited thereto.
In an exemplary embodiment, light guide plate 100 can have flexibility.The flexibility of light guide plate 100 can be determined by the thickness of light guide plate 100, shape and material, but the present invention is not limited thereto.
Fig. 4 is the partial enlarged drawing of the scattering pattern shown in Fig. 1, Fig. 5 sectional view that to be the scattering pattern shown in Fig. 4 intercept along the line I-I' of Fig. 4.
With reference to Figure 4 and 5, scattering pattern 300 can comprise the first dip plane 310 and the second dip plane 320.For simplicity, assuming that scattering pattern 300 is provided as giving prominence to from substrate surface 1201.Scattering pattern 300 is provided as the one exemplary embodiment be recessed in substrate surface 1201 and will describes in detail later.
First dip plane 310 and the second dip plane 320 can be arranged in the X-axis direction abreast.That is, the second dip plane 320 can arrange to arrange near the second side surface 140 near the first side surface 130, first dip plane 310.More specifically, arrange to arrange to arrange near the second side surface 140 near the first side surface 130, first dip plane 310 near the first side surface 130, second dip plane 320 in response to light source cell 200.
In cross section, the first dip plane 310 and the second dip plane 320 can be downward-sloping from substrate surface 1201.More specifically, as shown in Figure 5, the first dip plane 310 and the second dip plane 320 can be downward-sloping from substrate surface 1201, then can be adjacent to each other.That is, boundary member 330 can provide along the joining edge of the first dip plane 310 and the second dip plane 320.Therefore, scattering pattern 300 can have triangular cross-sectional shape, and the first dip plane 310 and the second dip plane 320 can provide the both sides of triangular cross-sectional shape.
First dip plane 310 can limit the first angle beta with substrate surface 1201, and the second dip plane 320 can limit the second angle [alpha] with substrate surface 1201.That is, the first angle beta and the second angle [alpha] can be two interior angles of the triangular cross-sectional shape shown in Fig. 5.
In an exemplary embodiment, the first angle beta can be less than the second angle [alpha].In an exemplary embodiment, the horizontal range d1 of the first dip plane 310 can be greater than the horizontal range d2 of the second dip plane 320.
In an exemplary embodiment, the first angle beta can in from about 1.8 degree (°) to the scope of about 5.7 °.The advantage of scattering pattern 330 of the first angle beta had in the scope of about 1.8 ° to about 5.7 ° is hereafter being described with reference to the experimental one exemplary embodiment shown in Fig. 6 to 8.
Fig. 6 is the curve map of the relation illustrated between the first angle beta and light convergence level (light concentration level), Fig. 7 is the curve map of the relation illustrated between the first angle beta and total light flux, and Fig. 8 is the curve map of the relation illustrated between the first angle beta and the intensity of forward-emitted light.
With reference to Fig. 6 to Fig. 8, when the first angle beta is in the scope of about 1.8 ° to about 5.7 °, with compared with the first angle beta is outside this scope time, the light being emitted through forward top surface 110 from light guide plate 100 can have larger intensity, therefore has more excellent lightness properties.In an exemplary embodiment, the first angle beta can be about 3.3 °.In the exemplary embodiment, the intensity being emitted through forward the light of top surface 110 from light guide plate 100 arrives its maximal value.That is, the first angle beta is less, and it is higher that light assembles level, and as shown in Figure 6, total flux is lower, as shown in Figure 7.That is, light convergence level and the intensity of total flux to the light launched forward from light guide plate 100 have reverse effect.Therefore, suitably determine that the balance of the first angle beta also therefore between balance light convergence level and total flux is important.The experimental result of Fig. 6 to 8 illustrates, when the first angle beta is in the scope of about 1.8 ° to about 5.7 °, especially about 3.3 ° time, the light intensity of launching forward of expectation can be obtained.
In an exemplary embodiment, the first dip plane 310 and the second dip plane 320 can be rectangle in plan view.In optional one exemplary embodiment, the first dip plane 310 and the second dip plane 320 can be circle or bending at least in part in plan view.The shape of the first dip plane 310 and the second dip plane 320 will describe later in more detail.
Hereafter the path of light in light guide plate 100 is being described with reference to Fig. 9.
Fig. 9 is the sectional view of the light guide plate shown in Fig. 1.
With reference to Fig. 9, from arranging the light launched near the light source cell 200 of the first side surface 130 can be totally reflected in light guide plate 100, then can pass top surface 110 from the top of light guide plate 100 and launch forward.
More specifically, the light beam launched from light source cell 200 can incide top surface 110.In response to the incident angle (that is, the first incidence angle θ 1) of light beam being greater than critical angle, light beam can be totally reflected from top surface 110 and then can advance towards the basal surface 120 comprising scattering pattern 300 and substrate surface 1201.In response to the light beam of arrival first dip plane 310, light beam can reflect then can return from the first dip plane 310 advances towards top surface 110.The first incidence angle θ 1 can be less than by angle i.e. the second incidence angle θ 2 that the light beam that dip plane 310 is reflected incides on top surface 110.In an exemplary embodiment, the second incidence angle θ 2 can be less than critical angle.Light beam can be transmitted through top surface 110, then can launch forward from light guide plate 100 through top surface 110.
The light inciding light guide plate 100 is shown in Figure 9 for and is totally reflected once, reflects, and launches from light guide plate 100, but the present invention is not limited thereto from the first dip plane 310.That is, in a further exemplary embodiment, the light inciding light guide plate 100 can not carry out any total reflection or launch from light guide plate 100 after carrying out more than one total reflection.In the one exemplary embodiment of the latter, light can arrive the first dip plane 310 at least one times.Be greater than critical angle in response to reflecting from the first dip plane 310 towards the incident angle of the light of top surface 110, light can be totally reflected from top surface 110, and again can carry out above-mentioned process.The light experiencing multiple total reflection in light guide plate 100 from the second side surface 140 (with reference to Fig. 1 and 2) reflection, then can be advanced towards top surface 110 or basal surface 120.
Hereafter other one exemplary embodiment will described.About description subsequently, same Reference numeral indicates same element, therefore by description is omitted.
Figure 10 is the sectional view of the one exemplary embodiment of the amendment of the scattering pattern shown in Fig. 5.
With reference to Figure 10, different from the scattering pattern of Fig. 5, scattering pattern has the second angle [alpha] being essentially right angle.
Second angle [alpha] can be right angle substantially, and the first angle beta of scattering pattern can be identical with the first angle beta of the scattering pattern of Fig. 5.Be right angle and the first angle beta is identical with first angle beta of Fig. 5 substantially in response to the second angle [alpha], the horizontal range d1 of the first dip plane 310 relatively can be greater than the horizontal range d1 of the first dip plane 310 of the scattering pattern of Fig. 5.
Be right angle substantially in response to the second angle [alpha], the horizontal range of the second dip plane 321a can be zero.That is, the second dip plane 321a can perpendicular to substrate surface 1201.
Figure 11 is the upward view of the light guide plate illustrated according to another one exemplary embodiment.
With reference to Figure 11, from the different of light guide plate of Fig. 3, light guide plate is that multiple scattering pattern 301 has bending flat shape in plan view.
Each scattering pattern 301 can have the flat shape comprising curve.That is, each periphery of scattering pattern 301 can be bent at least in part.In an exemplary embodiment, scattering pattern 301 can be provided as ellipse, and this ellipse has the major axis extended in the X-axis direction and the minor axis extended in the Y-axis direction.
The shape of scattering pattern 301 is hereafter being described in more detail with reference to Figure 12 and 13.
Figure 12 is the partial enlarged view of the scattering pattern shown in Figure 11, Figure 13 sectional view that to be the scattering pattern shown in Figure 12 intercept along the line II-II' of Figure 12.
With reference to Figure 12, scattering pattern 301 can comprise the first dip plane 311 and the second dip plane 321.
Second dip plane 321 can arrange near the first side surface 130 (with reference to Fig. 1), and the first dip plane 311 can arrange near the second side surface 140 (with reference to Fig. 1), discusses with reference to Fig. 3 as above.
With reference to Figure 13, scattering pattern 301 can have the cross sectional shape substantially the same with the scattering pattern of Fig. 5.
More specifically, scattering pattern 301 can have the leg-of-mutton cross sectional shape intercepted along the line being parallel to X-direction.That is, the periphery of scattering pattern 301 can bend in plan view at least in part, and the first dip plane 311 and the second dip plane 321 can be flat surfaces, instead of curved surface.Therefore, the boundary member 331 between the first dip plane 311 and the second dip plane 321, namely the joining edge of the first dip plane 311 and the second dip plane 321, can be parallel to Y direction.
Figure 14 is the sectional view of the one exemplary embodiment of the amendment of the scattering pattern shown in Figure 13.
With reference to Figure 14, the first dip plane 312 of scattering pattern 302 and the second dip plane 322 can comprise curved surface in cross section.The cross section along X-direction of scattering pattern 302 can have reclinate parabola shaped.That is, the periphery in the cross section of scattering pattern 302 can be the parabola shaped of part.First dip plane 312 and the second dip plane 322 can be downward-sloping and gently bend from substrate surface 1201.Boundary member 332 between first dip plane 312 and the second dip plane 322 can be straight, instead of bending.
In an exemplary embodiment, substrate surface 1201 and through the contact point the first dip plane 312 and substrate surface 1201 tangent line l1 between angle can be defined as the first angle beta, substrate surface 1201 and through the contact point the second dip plane 322 and substrate surface 1201 tangent line l2 between angle can be defined as the second angle [alpha].In the exemplary embodiment, the first angle beta can in the scope of about 1.8 ° to about 5.7 °, as discussed above.
Figure 15 is the sectional view of the one exemplary embodiment of the amendment of the scattering pattern shown in Figure 13, intercepts along Y direction.
With reference to Figure 15, the cross section along Y direction (such as, along boundary member 332) of scattering pattern 302 can have reclinate parabola shaped.
In an exemplary embodiment, multiple scattering pattern 302 with the cross sectional shape shown in Figure 14 and 15 can be provided.That is, the cross section along X-direction and Y direction of each scattering pattern 302 can have reclinate parabola shaped, i.e. half elliptic shape.In other words, each scattering pattern 302 can be provided as the shape being such as cut into the rugby of half along the plane comprising its major axis.
Figure 16 is the skeleton view of the light guide plate according to another one exemplary embodiment, and Figure 17 is the sectional view of the light guide plate shown in Figure 16, and Figure 18 is the upward view of the light guide plate shown in Figure 16.
With reference to Figure 16 to 18, from the different of light guide plate of Fig. 1 to 3, light guide plate 100 is that multiple scattering pattern 303 is recessed in substrate surface 1201.
More specifically, scattering pattern 303 can be provided as and is recessed in the substrate surface 1201 of basal surface 120 towards top surface 110.
As discussed above, substrate surface 1201 can be for determining that scattering pattern 300 is to provide the basis into projection or depression.
One or more scattering pattern 303 can be provided on basal surface 120.Scattering pattern 303 can be arranged to matrix, but the present invention is not limited thereto.That is, in a further exemplary embodiment, scattering pattern 303 can be distributed on basal surface 120 unevenly.Scattering pattern 303 can have substantially the same size, but the present invention is not limited thereto.That is, in a further exemplary embodiment, scattering pattern 303 can be of different sizes.
The shape of scattering pattern 303 is hereafter being described in more detail with reference to Figure 19 and 20.
Figure 19 is the partial enlarged view of the scattering pattern shown in Figure 18, Figure 20 sectional view that to be the scattering pattern shown in Figure 19 intercept along the line III-III' of Figure 19.
With reference to Figure 19 and 20, scattering pattern 303 can comprise the first dip plane 313 and the second dip plane 323.
First dip plane 313 and the second dip plane 323 are arranged side by side along X-direction.In the one exemplary embodiment shown in Figure 19 and 20, different from the one exemplary embodiment shown in Figure 4 and 5, first dip plane 313 can arrange near the first side surface 130 (with reference to Figure 16), and the second dip plane 323 can arrange near the second side surface 140 (with reference to Figure 16).More specifically, arrange to arrange nearer to light source cell 200 than the second dip plane 323 near the first side surface 130, first dip plane 313 in response to light source cell 200.
First dip plane 313 and the second dip plane 323 can be inclined upwardly from substrate surface 1201.More specifically, as shown in figure 20, the first dip plane 313 and the second dip plane 323 can be inclined upwardly from substrate surface 1201, then can be adjacent to each other.That is, boundary member 333 can provide along the joining edge of the first dip plane 313 and the second dip plane 323.
Therefore, scattering pattern 303 can have triangular cross-sectional shape in cross section, and the first dip plane 313 and the second dip plane 323 can provide two limits of triangular cross-sectional shape.
First dip plane 313 can limit the first angle beta with substrate surface 1201, and the second dip plane 323 can limit the second angle [alpha] with substrate surface 1201.That is, the first angle beta and the second angle [alpha] can be two interior angles of the triangular cross-sectional shape shown in Figure 20.
In an exemplary embodiment, the first angle beta can be less than the second angle [alpha].In an exemplary embodiment, the horizontal range d3 of the first dip plane 313 can be greater than the horizontal range d4 of the second dip plane 323.
In an exemplary embodiment, the first angle beta can from the scope of about 1.8 ° to about 5.7 °.In an exemplary embodiment, light guide plate 100 can provide the lightness properties of excellent forward-emitted light, discusses with reference to Fig. 6 to 8 as above.In an exemplary embodiment, the second angle [alpha] can be acute angle but be not limited to acute angle.In alternative one exemplary embodiment, the second angle [alpha] can be right angle.
In an exemplary embodiment, the first dip plane 313 and the second dip plane 323 can be rectangle in plan view.In optional one exemplary embodiment, the first dip plane 313 and the second dip plane 323 in plan view can for circular or bend at least in part.The shape of the first dip plane 313 and the second dip plane 323 will describe later in more detail.
Hereafter the path of light in light guide plate 100 is being described with reference to Figure 21.
Figure 21 is the sectional view of the light guide plate shown in Figure 16.
With reference to Figure 21, from arranging the light launched near the light source 210 of the first side surface 130 can be totally reflected in light guide plate 100, then can pass top surface 110 from the top of light guide plate 100 and launch forward.
More specifically, the light beam launched from light source 210 can incide top surface 110.In response to the incident angle (that is, the first incidence angle θ 1) of light beam being greater than critical angle, light beam can be totally reflected from top surface 110, then can advance towards basal surface 120.In response to the light beam of arrival first dip plane 313, light beam can reflect then can return from the first dip plane 313 advances towards top surface 110.Incided the angle on top surface 110 by the light beam that dip plane 313 is reflected, i.e. the second incidence angle θ 2, the first incidence angle θ 1 can be less than.In an exemplary embodiment, the second incidence angle θ 2 can be less than critical angle.Light beam can be transmitted through top surface 110, then can launch forward from light guide plate 100 through top surface 110.
The light incided in light guide plate 100 is shown in Figure 21 for being totally reflected once, reflects, and launches from light guide plate 100, but the present invention is not limited thereto from the first dip plane 313.That is, in a further exemplary embodiment, the light incided in light guide plate 100 can not carry out any total reflection or launch from light guide plate 100 after carrying out more than one total reflection.In the one exemplary embodiment of the latter, light can arrive the first dip plane 313 at least one times.Be greater than critical angle in response to reflecting from the first dip plane 313 towards the incident angle of the light of top surface 110, light can be totally reflected from top surface 110, and again can carry out above-mentioned process.The light experiencing multiple total reflection in light guide plate 100 can reflect from the second side surface 140, then can advance towards top surface 110 or basal surface 120.
That is, the path of light in light guide plate 100 can substantially the same with shown in Fig. 6.
Figure 22 is the upward view of the light guide plate illustrated according to another one exemplary embodiment.
With reference to Figure 22, light guide plate is from the different of light guide plate of Figure 18, and multiple scattering pattern 304 has bending flat shape.
Each scattering pattern 304 can have the flat shape comprising sweep in plan view.That is, each periphery of scattering pattern 304 can be bent at least in part.In an exemplary embodiment, scattering pattern 304 can be provided as ellipse, and this ellipse has the major axis extended in the X-axis direction and the minor axis extended in the Y-axis direction.
The shape of scattering pattern 304 is hereafter being described in more detail with reference to Figure 23 and 24.
Figure 23 is the partial enlarged view of the scattering pattern shown in Figure 22, Figure 24 sectional view that to be the scattering pattern shown in Figure 23 intercept along the line IV-IV' of Figure 23.
With reference to Figure 23, scattering pattern 304 can comprise the first dip plane 314 and the second dip plane 324.
First dip plane 314 can arrange to arrange near the second side surface 140 near the first side surface 130, second dip plane 324, discusses with reference to Figure 20 as above.
With reference to Figure 24, scattering pattern 304 can have the cross sectional shape substantially the same with the scattering pattern of Figure 20.
More specifically, scattering pattern 304 can have the leg-of-mutton cross sectional shape intercepted along the line being parallel to X-direction.That is, the periphery of scattering pattern 304 can bend at least in part, and the first dip plane 314 and the second dip plane 324 can be flat surfaces, instead of curved surface.Therefore, the boundary member 334 between the first dip plane 314 and the second dip plane 324, that is, the joining edge of the first dip plane 314 and the second dip plane 324, can be parallel to Y direction.
Figure 25 is the sectional view of the one exemplary embodiment of the amendment of the scattering pattern shown in Figure 24.
With reference to Figure 25, the first dip plane 315 of scattering pattern 305 and the second dip plane 325 can comprise curved surface in cross section.
That is, the cross section along X-direction of scattering pattern 305 can have be bent upwards parabola shaped.That is, the periphery in the cross section of scattering pattern 305 can be the parabola shaped of part.First dip plane 315 and the second dip plane 325 can be inclined upwardly from substrate surface 1201 and gently bend.Boundary member 335 between first dip plane 315 and the second dip plane 325 can be straight, instead of bending.
In an exemplary embodiment, substrate surface 1201 and through the contact point the first dip plane 315 and substrate surface 1201 tangent line l3 between angle can be defined as the first angle beta, substrate surface 1201 and through the contact point the second dip plane 325 and substrate surface 1201 tangent line l4 between angle can be defined as the second angle [alpha].In an exemplary embodiment, the first angle beta can in the scope of about 1.8 ° to about 5.7 °, as discussed above.
Figure 26 is the sectional view that the one exemplary embodiment of the amendment of the scattering pattern shown in Figure 24 intercepts along Y direction.
With reference to Figure 26, the cross section along Y direction (such as, along boundary member 334) of scattering pattern 305 can have be bent upwards parabola shaped.
In an exemplary embodiment, multiple scattering pattern 305 with the cross sectional shape shown in Figure 25 and 26 can be provided.That is, the cross section along X-direction and Y direction of each scattering pattern 305 can have be bent upwards parabola shaped, i.e. half elliptic shape.In other words, each scattering pattern 305 can be provided as the shape being such as cut into the rugby of half along the plane comprising its major axis.
Figure 27 is the skeleton view of the back light unit (BLU) according to one exemplary embodiment, and Figure 28 is the sectional view of the BLU shown in Figure 27.
Comprise light guide plate 100 with reference to Figure 27 and 28, BLU, light guide plate 100 comprises: top surface 110, has the first side and the second side that extend in X-direction and Y direction respectively; Basal surface 120, is relatively arranged with top surface 110; And first side surface 130 and the second side surface 140, to be arranged between top surface 110 and basal surface 120 and facing with each other, wherein basal surface 120 comprises substrate surface 1201 and multiple scattering pattern 300, multiple scattering pattern 300 is provided as outstanding from substrate surface 1201 or is recessed into substrate surface 1201, and each scattering pattern 300 comprises the first dip plane and adjacent first dip plane 310 that limit the first angle beta with substrate surface 1201 and limits the second dip plane 320 of the second angle [alpha] with substrate surface 1201.BLU also comprise arrange near light guide plate 100 the first side surface 130 light source cell 200 and relatively arrange with the top surface 110 of light guide plate 100 and comprise the prismatic lens 400 of multiple prism 410.
Light guide plate 100 can be substantially the same with the light guide plate of above-mentioned one exemplary embodiment, therefore by description is omitted.
Light source cell 200 can arrange near the first side surface 130 of light guide plate 100.Light source cell 200 can comprise the substrate 220 extended in the Y-axis direction and the one or more light sources 210 be arranged on the side of substrate 220.
Substrate 220 can supporting light sources 210, and can be provided as the bar extended along Y direction.In an exemplary embodiment, substrate 220 can comprise at least in part around the sidewall of light source 210.
One or more light source 210 can be provided on the side of substrate 220, i.e. on the surface of first side surface 130 in the face of light guide plate 100 of substrate 220.In an exemplary embodiment, light source 210 can be light emitting diode (LED), but is not limited thereto.
Light source 210 can be arranged at regular intervals along Y direction.
Prismatic lens 400 can be arranged in light guide plate 100.More specifically, prismatic lens 400 can contact with the top surface 110 of light guide plate 100 or can separate preset distance with the top surface 110 of light guide plate 100.
Prismatic lens 400 can comprise multiple prism 410.Prism 410 can be arranged side by side along X-direction, and can extend along Y direction.That is, in plan view for the prism 410 of bar shaped can be parallel to Y direction arrangement.
Each prism 410 can comprise chevron part in cross section.The chevron part of prism 410 can in the face of the top surface 110 of light guide plate 100.That is, as shown in figure 28, the cross section along X-direction of prism 410 has triangular shaped, term " chevron part ", when used herein, can index plane to the triangular shaped apex portion of the top surface 110 of light guide plate 100.
The path of the light launched from light source cell 200 is hereafter being described with reference to Figure 29.
Figure 29 is the sectional view of the BLU shown in Figure 27.
With reference to Figure 29, from arranging the light launched near the light source cell 200 of the first side surface 130 can be totally reflected in light guide plate 100, then can pass top surface 110 from the top of light guide plate 100 and launch forward.
More specifically, the light beam launched from light source cell 200 can incide top surface 110.Incident angle (that is, the first incidence angle θ 1) in response to light beam is greater than critical angle, and light beam can be totally reflected from top surface 110, then can advance towards basal surface 120.In response to the light beam of arrival first dip plane 310, light beam can reflect then can return from the first dip plane 310 advances towards top surface 110.Incided the angle on top surface 110 by the light beam that dip plane 310 is reflected, i.e. the second incidence angle θ 2, the first incidence angle θ 1 can be less than.In an exemplary embodiment, the second incidence angle θ 2 can be less than critical angle.Light beam can be transmitted through top surface 110, then can launch forward from light guide plate 100 through top surface 110.
Be less than critical angle in response to the second incidence angle θ 2, the light beam being transmitted through the top surface 110 of light guide plate 100 can be advanced towards prismatic lens 400 with third reflect angle θ 3.Then, light beam can be transmitted through the side of one of prism 410 and can advance at the top from the opposite side reflection of respective prisms 410 thus towards prismatic lens 400.
The first angle beta inciding the light beam on the top surface 110 of light guide plate 100 can meet formula (1):
β = 1 2 ( θ i - sin - 1 [ n 3 n 2 sin ( 3 γ 2 - 90 ) ] ) · · · ( 1 )
Wherein θ irepresent the incident angle of light beam, n 2represent the refractive index of light guide plate 100, n 3represent the refractive index of prismatic lens 400, γ represents the 3rd angle.Utilize above formula, first angle beta of the best for predetermined incident angle can be determined.With reference to Figure 30, it illustrates the experimental result utilizing above formula to obtain, the intensity response of the light launched forward from BLU is respectively about 3.3 ° and about 65 ° in the first angle beta and the 3rd angle γ and reaches its maximal value, and is respectively about 2.3 ° and about 68 ° in response to the first angle beta and the 3rd angle γ and reaches its second maximal value.That is, be about 3.3 ° or about 2.3 ° in response to the first angle beta, BLU can have larger intensity, therefore has the excellent luminance brightness character of launching forward.
Figure 31 is the sectional view of the one exemplary embodiment of the amendment of the light guide plate shown in Figure 29.
With reference to Figure 31, light guide plate 100 is from the different of light guide plate of Figure 29, multiple scattering pattern 303 be recessed in substrate surface 1201 with faced by top surface 110.
More specifically, scattering pattern 303 can be provided as in the substrate surface 1201 being recessed into basal surface 120 with in the face of top surface 110.Be provided as depression in response to scattering pattern 303, the path of light in light guide plate 100 can substantially the same with shown in Figure 29.That is, the light beam incided on the top surface 110 of light guide plate 100 can be totally reflected from top surface 110, then can advance towards basal surface 120.In response to the light beam of arrival first dip plane 313, light beam can reflect then can return from the first dip plane 313 advances towards top surface 110.Again be incident on top surface 110 in response to the light beam reflected from the first dip plane 313 with the incident angle being greater than critical angle, light beam can be transmitted through top surface 110, then can advance towards the prismatic lens 400 be arranged on light guide plate 100.Then, light beam can be transmitted through the side of one of them prism 410 of prismatic lens 400 and can reflect from the opposite side of respective prisms 410 thus launch forward from prismatic lens 400.
Figure 32 is the upward view of the BLU illustrated according to another one exemplary embodiment.
The multiple scattering pattern 301 be provided in light guide plate are comprised with reference to Figure 32, BLU.With from light source cell 200 not so away from region compared with, scattering pattern 301 can be distributed in more thick and fast from the region away from light source cell 200.
More specifically, as mentioned above, scattering pattern 301 can homogeneously or heterogeneously be distributed on the basal surface 120 of light guide plate.As mentioned above, scattering pattern 301 can be arranged to the matrix comprising multiple row and multiple row.In an exemplary embodiment, with from light source cell 200 not so away from region compared with, more scattering pattern 301 can be provided in from the region away from light source cell 200.That is, with from light source cell 200 not so away from region compared with, scattering pattern 301 can be distributed in more thick and fast from the region away from light source cell 200.Therefore, the scattering pattern 301 of per unit area number can be greater than in the region away from light source cell 200 from light source cell 200 not so away from region in.That is, the number of the scattering pattern 301 of per unit area can increase along the direction of positive X-axis.
Figure 33 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 32.
The different of BLU with reference to Figure 33, this BLU and Figure 32 are: multiple scattering pattern 301 is distributed in light guide plate unevenly.More specifically, as mentioned above, different from the scattering pattern 301 of Figure 32, scattering pattern 301 can be distributed in light guide plate unevenly.In the one exemplary embodiment of Figure 33, as in the one exemplary embodiment of Figure 32, the number of the scattering pattern 301 of per unit area can near the region of the first side surface or light source cell 200 to so not becoming greatly near the direction i.e. direction of positive X-direction in the region of the first side surface or light source cell 200.
Figure 34 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 32.
The different of BLU with reference to Figure 34, this BLU and Figure 32 are: multiple scattering pattern 301 is provided with different sizes.
More specifically, scattering pattern 301 can be of different sizes.In an exemplary embodiment, the size of scattering pattern 301 can reduce near the first side surface or light source cell.Namely, the size of scattering pattern 301 can become large along the direction of positive X-direction.Therefore, scattering pattern 301 can become large with the ratio in the whole region of the basal surface 120 of light guide plate on the direction of positive X-direction.
Figure 35 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 32.
The different of BLU with reference to Figure 35, BLU and Figure 32 are: the number of the scattering pattern 301 of per unit area increases near the first center line C1.
More specifically, the first center line C1 of the core of the basal surface 120 of light guide plate can be defined through.First center line C1 can extend through the center of the basal surface 120 of light guide plate in the X-axis direction.The number of scattering pattern 301 can increase near the first center line C1.That is, the number of the scattering pattern 301 of per unit area can than larger in close 3rd side surface of light guide plate and the region of the 4th side surface in the region at the center near basal surface 120, and the 3rd side surface and the 4th side surface are relative with the second side surface with the first side surface of light guide plate respectively.
Figure 36 is the fragmentary, perspective view of the BLU illustrated according to another one exemplary embodiment.
The different of BLU with reference to Figure 36, this BLU and Figure 27 are: the top surface 111 of light guide plate partly tilts.
More specifically, top surface 111 can comprise flatly extend from the coboundary of the first side surface 130 the first flat surfaces 111a, from the downward-sloping dip plane 111b of the first flat surfaces 111a and the second flat surfaces 111c of flatly extending from dip plane 111b.
Second flat surfaces 111c can extend to the coboundary of the second side surface 140.In an exemplary embodiment, the width of the first side surface 130 can be different from the width of the second side surface 140.That is, the first side surface 130 can be wider than the second side surface 140.
Figure 37 is the fragmentary, perspective view of the BLU illustrated according to another one exemplary embodiment.
The different of BLU with reference to Figure 37, this BLU and Figure 27 are: multiple scattering pattern 112a is provided on the top surface 112 of light guide plate.
More specifically, multiple scattering pattern 112a can be provided on the top surface 112 of light guide plate.In an exemplary embodiment, scattering pattern 112a can be arranged side by side in the X-axis direction, and can extend in the Y-axis direction.That is, scattering pattern 112a can be provided as the bar extended along Y direction.Scattering pattern 112a is shown in Figure 37 for having semicircular cross sectional shape, but the present invention is not limited thereto.That is, in a further exemplary embodiment, scattering pattern 112a can be provided as and has polygonal cross sectional shape.
Figure 38 is the skeleton view of the BLU according to another one exemplary embodiment, and Figure 39 is the upward view of the BLU shown in Figure 38, and Figure 40 is the sectional view intercepted along the line V-V' of Figure 39.
Be with reference to the different of BLU of Figure 38 to 40, this BLU and Figure 27: it also comprises and arranges to obtain the secondary light source unit 201 of the second side surface 140 of close light guide plate.
More specifically, this BLU can comprise two light source cells 200, namely arrange near the first side surface 130 of light guide plate the first light source cell 200 and arrange near the secondary light source unit 201 of the second side surface 140.
One or more light sources 211 that secondary light source unit 201 can comprise substrate 221 and be provided on the side of substrate 221.Secondary light source unit 201 can be substantially identical with the first light source cell 200, therefore, by description is omitted.
Comprise two light source cells 200 in response to BLU, multiple scattering pattern 305 can be provided symmetrically on the basal surface 120 of light guide plate.
More specifically, the first angle beta can be substantially identical with the second angle [alpha], and the first angle beta is the angle between the first dip plane 316 and substrate surface 1201, and the second angle [alpha] is the angle between the second dip plane 326 and substrate surface 1201.That is, boundary member 336 can provide along the joining edge of the first dip plane 326 and the second dip plane 326.
As shown in figure 40, the horizontal range d5 of the first dip plane 316 can be substantially identical with the horizontal range d6 of the second dip plane 326.That is, the first dip plane 326, dip plane 316, second and substrate surface 1201 can provide the shape of isosceles triangle in cross section.
Figure 41 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 39.
The different of BLU with reference to Figure 41, this BLU and Figure 39 are: the basal surface 120 of light guide plate is divided into first area 127 and second area 128 by the second center line C2.
More specifically, can limit and extend in the Y-axis direction and basal surface 120 be divided into the second center line C2 of two halves.The basal surface 120 of light guide plate can be divided into first area 127 and second area 128 by the second center line C2.
Multiple scattering pattern 307 can be arranged in first area 127, and multiple scattering pattern 308 can be arranged in second area 128.Scattering pattern 307 and scattering pattern 308 can arrange in the opposite direction.That is, the first area 127 comprising scattering pattern 307 can be the mirror image of the second area 128 comprising scattering pattern 308.
In an exemplary embodiment, the protrusion from substrate surface is provided as in response to scattering pattern 307, second dip plane of scattering pattern 307 can arrange near the first side surface, and the first dip plane of scattering pattern 307 can arrange near the second center line C2.First dip plane of each scattering pattern 307 and the relative position of the second dip plane can be to provide as projection still caves in and change according to scattering pattern 307.
In order to second area 128 corresponds to first area 127, the second dip plane of scattering pattern 308 can arrange near the second side surface, and the first dip plane of scattering pattern 308 can arrange near the second center line C2.That is, the first dip plane of scattering pattern 308 and the second dip plane side that can arrange in the first dip plane and the second dip plane with scattering pattern 307 in the opposite direction on arrange.
Figure 42 is the upward view of the one exemplary embodiment of the amendment of the BLU shown in Figure 41.
The different of BLU with reference to Figure 42, this BLU and Figure 41 are: the number of the scattering pattern 307 or 308 of per unit area increases near the second center line C2.
More specifically, as mentioned above, the density of scattering pattern 307 or 308 can change from a part of the basal surface 120 of light guide plate to another part.In an exemplary embodiment, the density of scattering pattern 307 or 308 can increase near the second center line C2.That is, the number of the scattering pattern 307 or 308 of per unit area can than larger in the region near the first side surface or the second side surface in the region near the second center line C2.
Figure 43 is the decomposition diagram of the liquid crystal display (LCD) according to one exemplary embodiment.Comprise BLU with reference to Figure 43, LCD1000 and be arranged on the display panel 160 on BLU.BLU comprises light guide plate 100, and this light guide plate 100 comprises: top surface 110, has the first side and the second side that extend in X-direction and Y direction respectively; Basal surface 120, is relatively arranged with top surface 110; And first side surface 130 and the second side surface 140, to be arranged between top surface 110 and basal surface 120 and facing with each other, wherein basal surface 120 comprises substrate surface 1201 and multiple scattering pattern 300, multiple scattering pattern 300 is provided as outstanding from substrate surface 1201 or is recessed into substrate surface 1201, and each scattering pattern 300 comprises the first dip plane and adjacent first dip plane 310 that limit the first angle beta with substrate surface 1201 and limits the second dip plane 320 of the second angle [alpha] with substrate surface 1201.BLU also comprise arrange near light guide plate 100 the first side surface 130 light source cell 200 and relatively arrange with the top surface 110 of light guide plate 100 and comprise the prismatic lens 400 of multiple prism.
This BLU can be substantially identical with the BLU of above-mentioned one exemplary embodiment, therefore by description is omitted.
LCD1000 can also comprise display panel 160, top bay 150 and bottom bay 152.Hereafter the structure of LCD1000 will described in more detail.
Display panel 160 can have viewing area and non-display area.Display panel 160 can comprise first substrate 161, be oppositely arranged with first substrate 161 second substrate 162, liquid crystal layer (not shown) and the driver element 164 be attached on first substrate 161 and printed circuit board (PCB) (PCB) 167.
The viewing area of display panel 160 can be the region wherein showing image, and the non-display area of display panel 160 can be the region wherein not showing image.In an exemplary embodiment, viewing area can be provided in the centre of the crossover region of first substrate 161 and second substrate 162, and non-display area can be arranged along the border of the crossover region of first substrate 161 and second substrate 162.In a further exemplary embodiment, viewing area can correspond to display panel 160 not by the part that top bay 150 is overlapping, non-display area can correspond to the part overlapping by top bay 150 of display panel 160.The shape of viewing area can be similar to the shape of second substrate 162, and the area of viewing area can be less than the area of second substrate 162.The edge of viewing area and the edge of non-display area can be parallel to the side of second substrate 162.Border between viewing area and non-display area can provide rectangular shape.
First substrate 161 can overlapping second substrate 162 at least in part.The core of the crossover region of first substrate 161 and second substrate 162 can correspond to viewing area, and the boundary member of the crossover region of first substrate 161 and second substrate 162 can correspond to non-display area.Driver element 164 and PCB167 can be attached at display panel 160 not by first substrate 161 and the overlapping part of second substrate 162.
Second substrate 162 relatively can be arranged with first substrate 161.Liquid crystal layer can be plugged between first substrate 161 and second substrate 162.Containment member (not shown) such as sealant can be arranged along the edge of first substrate 161 and second substrate 162, and first substrate 161 and second substrate 162 can be engaged and be sealed.
In an exemplary embodiment, first substrate 161 and second substrate 162 can be all rectangles, but are not limited to rectangular shape.Namely, first substrate 161 and the second substrate 162 various shapes that can be provided as except rectangular shape according to the shape of display panel 160.
Driver element 164 can be applied for the various signals (such as drive singal) of the image driven in viewing area.PCB167 can export various signal to driver element 164.
One or more optical sheet 126, BLU and bottom bay 152 can be arranged on the basal surface of display panel 160.More specifically, optical sheet 126 can be arranged on BLU, and bottom bay 152 can be arranged on below BLU.
The optical sheet 126 regulating the optical property of the light from BLU transmitting and the mold frame 151 holding optical sheet 126 wherein can be arranged on BLU.
Mold frame 151 can be arranged by the edge contact of the basal surface with display panel 160 and support and fixed display panel 160.In an exemplary embodiment, the boundary member of the basal surface of display panel 160 can correspond to non-display area.That is, mold frame 151 can the non-display area of overlapping display panel 160 at least in part.
Top bay 150 can cover display panel 160 edge and around the side of display panel 160.Bottom bay 152 can hold optical sheet 126 and BLU wherein.In an exemplary embodiment, top bay 150 and bottom bay all can comprise conductive material, such as metal.
Although specifically illustrate with reference to its one exemplary embodiment and describe the present invention, but those skilled in the art will appreciate that, can carry out the various change in form and details wherein and not deviate from the spirit and scope of the present invention, scope of the present invention be defined by the claims.One exemplary embodiment should only be understood with descriptive implication, instead of the object in order to limit.
This application claims the right of priority of the korean patent application No.10-2013-0157297 submitted on Dec 17th, 2013, its disclosure by reference entirety is incorporated into this.

Claims (20)

1. a light guide plate, comprising:
Top surface, is configured to have the first side and the second side that extend in X-direction perpendicular to one another and Y direction respectively;
Basal surface, is configured to relatively arrange with described top surface, and comprises:
Substrate surface; With
Multiple scattering pattern, is provided as outstanding from described substrate surface or is recessed into described substrate surface,
Described multiple scattering pattern each comprises the first dip plane and adjacent described first dip plane that limit the first angle with described substrate surface and limits the second dip plane of the second angle with described substrate surface; And
First side surface and the second side surface, to be configured to be arranged between described top surface and described basal surface and facing with each other,
Wherein said first angle is from the scope of 1.8 ° to 5.7 °.
2. light guide plate as claimed in claim 1, wherein said second angle is right angle.
3. light guide plate as claimed in claim 1, wherein said multiple scattering pattern has elliptical shape in cross-section, and this elliptical shape in cross-section has the major axis extended in described X-direction and the minor axis extended in described Y direction.
4. light guide plate as claimed in claim 1, wherein
The periphery of described first dip plane and described second dip plane is included in the sweep in the plane limited by described X-direction and Y direction, and
Described first dip plane and described second dip plane are flat surfaces in the cross section perpendicular to the plane limited by described X-direction and Y direction.
5. light guide plate as claimed in claim 1, wherein
Described multiple scattering pattern is given prominence to from described substrate surface in the cross section perpendicular to the plane limited by described X-direction and Y direction, and
The each of described multiple scattering pattern has the parabolic shape be bent upwards.
6. light guide plate as claimed in claim 1, wherein
Described multiple scattering pattern is recessed in described substrate surface in the cross section perpendicular to the plane limited by described X-direction and Y direction, and
The each of described multiple scattering pattern has reclinate parabolic shape.
7. light guide plate as claimed in claim 1, wherein said first dip plane and described second dip plane comprise curved surface.
8. a back light unit, comprising:
Light guide plate, light source cell and prismatic lens,
Described light guide plate is configured to comprise:
Top surface, has the first side and the second side that extend in X-direction perpendicular to one another and Y direction respectively;
Basal surface, relatively arranges with described top surface, and comprises:
Substrate surface; With
Multiple scattering pattern, is provided as outstanding from described substrate surface or is recessed into described substrate surface,
Each scattering pattern comprises the first dip plane of limiting the first angle with described substrate surface and adjacent described first dip plane and limits the second dip plane of the second angle with described substrate surface;
First side surface and the second side surface, to be arranged between described top surface and described basal surface and facing with each other,
Wherein said first angle from the scope of 1.8 ° to 5.7 °,
Described light source cell is configured to arrange near the first side surface of described light guide plate,
Described prismatic lens to be configured to be arranged in described light guide plate and to comprise multiple prisms of the described top surface in the face of described light guide plate.
9. back light unit as claimed in claim 8, wherein said multiple prism is arranged side by side and extends in described Y direction in described X-direction.
10. back light unit as claimed in claim 8, wherein said multiple prism each comprises the chevron part of the described top surface in the face of described light guide plate.
11. back light units as claimed in claim 10, the interior angle of wherein said chevron part is defined as the 3rd angle, and described first angle and described 3rd angle are respectively 3.3 ° and 65 °.
12. back light units as claimed in claim 10, the interior angle of wherein said chevron part is defined as the 3rd angle, and described first angle and described 3rd angle are respectively 2.3 ° and 68 °.
13. back light units as claimed in claim 8, wherein the number of the scattering pattern of per unit area increases along the direction of positive X-axis.
14. back light units as claimed in claim 8, the size of wherein said multiple scattering pattern increases along the direction of positive X-axis.
15. back light units as claimed in claim 8, the described top surface of wherein said light guide plate comprise flatly extend from the coboundary of described first side surface the first flat surfaces, from the downward-sloping inclined surface of the first flat surfaces and the second flat surfaces of flatly extending from described inclined surface.
16. 1 kinds of liquid crystal display, comprising:
Back light unit and be configured to be arranged on the display panel on described back light unit,
Described back light unit comprises light guide plate, light source cell and prismatic lens,
Described light guide plate is configured to comprise:
Top surface, has the first side and the second side that extend in X-direction perpendicular to one another and Y direction respectively;
Basal surface, relatively arranges with described top surface, and comprises:
Substrate surface; With
Multiple scattering pattern, is provided as outstanding from described substrate surface or is recessed into described substrate surface,
Each scattering pattern comprises the first dip plane of limiting the first angle with described substrate surface and adjacent described first dip plane and limits the second dip plane of the second angle with described substrate surface;
First side surface and the second side surface, to be arranged between described top surface and described basal surface and facing with each other,
Wherein said first angle from the scope of 1.8 ° to 5.7 °,
Described light source cell is configured to arrange near described first side surface of described light guide plate,
Described prismatic lens to be configured to be arranged in described light guide plate and to comprise multiple prisms of the described top surface in the face of described light guide plate.
17. liquid crystal display as claimed in claim 16, wherein said multiple prism each comprises the chevron part of the described top surface in the face of described light guide plate.
18. liquid crystal display as claimed in claim 16, the interior angle of wherein said chevron part is defined as the 3rd angle, and described first angle and described 3rd angle are respectively 3.3 ° and 65 °.
19. liquid crystal display as claimed in claim 16, the interior angle of wherein said chevron part is defined as the 3rd angle, and described first angle and described 3rd angle are respectively 2.3 ° and 68 °.
20. liquid crystal display as claimed in claim 16, wherein
Described multiple scattering pattern is given prominence to from described substrate surface in the cross section perpendicular to the plane limited by described X-direction and Y direction, and
The each of described multiple scattering pattern has the parabolic shape be bent upwards.
CN201410322776.5A 2013-12-17 2014-07-08 Light guide panel, backlight unit and liquid crystal display comprising the same Pending CN104714269A (en)

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KR10-2013-0157297 2013-12-17

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