CN109716019A - Edge-lit light guide plate and device comprising it - Google Patents
Edge-lit light guide plate and device comprising it Download PDFInfo
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- CN109716019A CN109716019A CN201780058027.8A CN201780058027A CN109716019A CN 109716019 A CN109716019 A CN 109716019A CN 201780058027 A CN201780058027 A CN 201780058027A CN 109716019 A CN109716019 A CN 109716019A
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- light guide
- light
- guide plate
- assembly parts
- lgp
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—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
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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)
- Liquid Crystal (AREA)
Abstract
Light guide assembly parts (100) disclosed herein include light guide plate (110) and following at least one: close to the photo-absorption region of the light incident edge of light guide plate, or passing through the diffusion reflector layer (130) that optical bond layer (135) are bonded at least part main surface (120) of light guide plate.Further disclose display equipment and light emitting device including such light guide plate.
Description
The cross reference of related application
The application is according to 35U.S.C. § 119, it is desirable that 09 month 2016 U.S. Provisional Application Ser the 62/th submitted for 21st
No. 397441 priority, it is herein based on this application and its full text is incorporated herein by reference.
Technical field
Display or light emitting device present disclose relates generally to edge-lit light guide plate and comprising such light guide plate, more
In particular it relates to the light guide plate comprising optical bond layer, diffusion reflector layer and optional photo-absorption region.
Background technique
Liquid crystal display (LCD) is usually used in various electronic devices, for example, mobile phone, laptop, electronic plane, TV
Machine and computer monitor.But compared to other display equipments, LCD can be in terms of brightness, contrast, efficiency and angle of visibility
It is restricted.For example, for conventional LCD, existing for higher contrast, color to be competed with other display technologies
The demand in domain and brightness, while also needing to balance power requirement and plant bulk (for example, thickness).
LCD may include back light unit (BLU) for generating light, then can be converted, be filtered, and/or partially
Vibration is to generate required image.BLU can be (light source comprising being coupled to the edge of light guide plate (LGP)) of edge-lit either
(e.g., including be arranged in the subsequent two-dimension light source array of LCD panel) that back shines.BLU luminous compared to back, edge-lit
BLU may have advantage on reducing display thickness.For example, in order to realize required optical uniformity and/or in order to avoid straight
Hot spot in sending and receiving light BLU, light source is possibly disposed in distance LGP a certain distance, so that monitor overall thickness is greater than
The case where edge-lit BLU.
At present consumer for electronic device require to include thinner display and/or around display area more
Narrow inclined-plane.But as LGP thins down to adapt to this class display, they may have the rigidity of reduction, thus
It is difficult to produce while being sufficiently large and thin LGP to meet customer demand.For plastics LGP especially such case, phase
There is lower mechanical strength and/or hardness than the glass counterpart in them.
It in some cases, can be by improving the rigidity of LGP to the major surface poststack reflector of LGP.But
In the case where edge-lit LGP, such LGP- reactor stacking assembly parts are also likely to be present some disadvantages, for example, close to coupling
The edge for having closed the LGP of light source generates bright band.One potential solution of bright band phenomenon may include for example: increase LGP with
Gap between light source.But the gap increased between light source and LGP will increase the size on display inclined-plane and/or can reduce
Optical coupling efficiency.Bright band effect can also be reduced by being chamfer to the light incident edge of LGP, but to the volume that LGP is chamfer
Outer step can increase manufacture and/or the integration cost of entire assembly parts, and chamfer length be also possible to necessarily cause it is thicker
Inclined-plane.
Therefore it provides also avoid or reducing the LGP of bright band effect simultaneously with reduced thickness and/or improved rigidity
Assembly parts can be advantageous.Uniform light distribution for providing in terms of capable of generating on observation surface in color and/or brightness
Edge-lit BLU can also be advantageous.
Summary of the invention
In various embodiments, this disclosure relates to light guide assembly parts comprising light guide plate, the light guide plate, which has, to shine
Main surface, corresponding main surfaces and at least one light incident edge and the phase that light guide plate is bonded to by optical bond layer
To at least part of diffusion reflector layer of main surface, the refractive index of the optical bond layer is lower than the refractive index of light guide plate.This
Text further discloses light guide assembly parts comprising light guide plate, the light guide plate have shine main surface, corresponding main surfaces and at least
One light incident edge, be bonded to by optical bond layer light guide plate the corresponding main surfaces it is at least part of reflective
Layer；And the photo-absorption region of at least one light incident edge close to light guide plate.There is also disclosed herein include such light
Display equipment, light emitting device and the electronic device led.
In a non-limiting embodiment, diffusion reflector layer can be bonded to the substantially entire opposite major surfaces of LGP
Face.In other embodiments, diffusion reflector layer can be bonded to the corresponding main surfaces close at least one light described in LGP
A part of incident edge, and the second reflective layer (it can be specularly or diffusely) can be bonded to it is described relatively main
The remaining part on surface.The width of diffusion reflective tape can be about 2mm to about 15mm.In various embodiments, it diffuses reflective
Layer can have following at least one: greater than or the 3-dB angle of scattering equal to about 80 degree, or the Sigma greater than or equal to about 1
Scattering parameter.According to other embodiments, diffusion reflector layer can be at least about 90% in the reflectivity of visible wavelength.
Photo-absorption region may include being bonded to the luminous main surface or at least one of corresponding main surfaces of light guide plate
Light-absorption layer.In various embodiments, reflective layer can be bonded to the first area of the corresponding main surfaces of light guide plate, and
Light-absorption layer be bonded to it is following at least one: the corresponding main surfaces of (i) light guide plate close at least one described light emitting edge
The second area of edge, or (ii) light guide plate luminous main surface the third area close at least one light incident edge
Domain.The width of photo-absorption region can be for example: about 2mm to about 15mm and/or the absorptivity in visible wavelength can be to
Few about 80%.
In various embodiments, at least one described light incident edge of light guide plate may include at least one inclined-plane.
The refractive index of optical bond layer can be for example lower than the refractive index of light guide plate at least about 7%.In certain non-limiting implementations
In mode, in the length greater than or equal to about 500mm, optical bond layer is at least about in the light transmittance of visible wavelength
30%.
Other feature and advantage of the disclosure, Partial Feature and advantage pair therein are given in the following detailed description
It for those skilled in the art, is easy for finding out according to being described, or by implementing to include described in detail below, right
Method described herein including claim and attached drawing and be realized.
It should be understood that foregoing general description and the following detailed description all indicate the various embodiments of this paper, it is used to
It provides and the property of claim and the overall understanding of characteristic or frame is understood.Including attached drawing provide to this paper into
The understanding of one step, attached drawing are incorporated in the present specification and constitute part of specification.Attached drawing illustrates this with graphic form
The various embodiments of text, and together with specification it is used to explain the principle and operation of this paper.
Detailed description of the invention
When read in conjunction with the accompanying drawings, it can be even further appreciated that described in detail below.
Figure 1A-B shows the illustrative light guide assembly parts according to the various embodiments of the disclosure；
Fig. 2A-B shows the illustrative light guide assembly parts according to disclosure other embodiments；
Fig. 3 A-B shows the illustrative light guide assembly parts according to disclosure other embodiments；
Fig. 4 A-B illustrates the light distribution being laminated on the LGP of specular reflector and diffusion reflector respectively；
Fig. 5 is brightness at a distance from the light incident edge relative to the LGP that specular reflector and diffusion reflector has been laminated
Relational graph；
Fig. 6 A-B is for specular reflector has been laminated respectively and has diffused the LGP of reflector, and two positions are (apart from light incidence
The relational graph of luminance difference and light source and LGP the distance between of the edge between 10mm and 500mm)；
Fig. 7 A-B is for specular reflector has been laminated respectively and has diffused the beveling LGP of reflector, and two positions are (apart from light
The relational graph of luminance difference and light source and LGP the distance between of the incident edge between 10mm and 500mm)；
Fig. 8 is illustrated for the LGP with different bevel altitudes, the pass of the distance between coupling efficiency and light source and LGP
System's figure；
Fig. 9 is illustrated for the diffusion reflector with different Sigma's scattering parameters, the relationship of scattered power and polar angle
Figure；
Figure 10 is the LGP for the reactor with different Sigma's parameters has been laminated, and two positions are (apart from light emitting edge
The relational graph of luminance difference and light source and LGP the distance between of the edge between 10mm and 500mm)；
Figure 11 is for specular reflector has been laminated and has diffused the LGP of reflector bands, and two positions are (apart from light incident edge
The relational graph of luminance difference and diffusion bandwidth between 10mm and 500mm)；
Figure 12 A-B is the LGP for specular reflector has been laminated, two positions (apart from light incident edge be 10mm and
The relational graph of luminance difference and absorption band width between 500mm)；With
Figure 12 C is the LGP for diffusion reflector has been laminated, two positions (apart from light incident edge be 10mm and
The relational graph of luminance difference and absorption band width between 500mm).
Specific embodiment
Light guide assembly parts disclosed herein include: light guide plate, the light guide plate include shine main surface, corresponding main surfaces,
The diffusion for being bonded to the corresponding main surfaces of light guide plate at least one light incident edge and by optical bond layer is reflective
Layer, the refractive index of the optical bond layer are lower than the refractive index of light guide plate.
There is also disclosed herein light guide assembly parts comprising light guide plate, the light guide plate have shine main surface, opposite major surfaces
Face and at least one light incident edge, be bonded to by optical bond layer light guide plate the corresponding main surfaces reflective layer；With
And the photo-absorption region of at least one light incident edge close to light guide plate.
There is also disclosed herein the devices comprising such light guide, for example, display equipment, light emitting device and electronic device, example
Such as: television set, computer, mobile phone, plate and other display pannels, luminaire, solid-state light emitting element, billboard and other
Constracture unit etc..
The various embodiments of the disclosure are discussed now with reference to Fig. 1-3, which show the exemplary implementations of light guide assembly parts
Mode.Following general description is intended to provide the overview for device claimed, and disclosure full text will be referring to institute
The non-limiting embodiment shown more specifically discusses various aspects, and in content of this disclosure, these embodiments are can phase
Interchangeable.
Figure 1A-B shows respectively including light guide plate (LGP) 110 or chamfers the light guide assembly parts 100 of LGP 110', 100'
Various illustrative embodiments.LGP 100,100' may include shine main surface 115 and corresponding main surfaces 120.In some realities
It applies in mode, LGP 100,100' can also include at least one light incident edge 125, light source 105 is optically coupled to described
At least one light incident edge 125.Light source 105 can have height h, can depend on the thickness of such as LGP 100,100'
It changes.Although illustrating only a light incident edge 125 in fig. 1-3, it is to be appreciated that, LGP may include not
An only light incident edge, such as: 2,3,4, or more light incident edge.In some embodiments, LGP's is every
A edge is coupled to a few light source, to form light incidence circumference around LGP.In addition, as shown in Figure 1B, light emitting edge
Edge 125 may include beveled surface 145, can have height H and can form angle with the main surface of beveling LGP 110'
Spend θ.Guide-lighting assembly parts 100,100' can also include the diffusion reflector layer that main surface 120 is bonded to by optical bond layer 135
130。
As used herein, term " optical coupled " is intended to indicate that the edge that light source is placed on to LGP, to introduce light into LGP
In.Although light is not physically contacted with LGP, can be optical coupled with LGP, for example, the two components can be with compartment
Gap G (as shown in Figs. 1-3), but in some embodiments it is possible to gap is not present.Additional light source (can not shown
It is optically coupled to other edge surfaces of LGP out), for example, adjacent or opposite edge surface.
As shown in figs. 1A-b, diffusion reflector layer 130 can cover entire or substantially entire main surface 120.Alternatively, such as
Shown in Fig. 2A-B, diffusion reflector layer 130 can only cover the main surface 120 of a part.For example, (it can be mirror to reflective layer 140
Face reflection or diffusing reflection, but not limited to this) it the first area of main surface 120 and diffusion reflector layer 130 can be covered can cover
Lid leans on dipped beam incident edge 125 or region adjacent thereto, for example, forming diffusion reflective tape.Such diffusion reflective tape can have
There is width WD, predetermined position is extended to from light incident edge towards opposite edges along LGP.Although Fig. 2A-B display only one
A light source 105 is optically coupled to an edge of LGP, it is to be appreciated that, multiple light sources can be coupled to one of LGP
Edge or more than one edge.In such cases, the position for diffusing reflective tape can be close to being optically coupled to light source
Any edge.For example, LGP may include two or more light incident edges, and the position of diffusion reflective tape can be close
Each light incident edge.
It in other embodiments, may include photo-absorption region, example referring to Fig. 3 A-B, guide-lighting assembly parts 100,100'
Such as, light-absorption layer 150, position can be by dipped beam incident edge 125 or adjacent thereto, for example, forming bands absorption.Such suction
Light belt can have width WA, predetermined position is extended to from light incident edge towards opposite edges along LGP.Absorbed layer 150
It can be bonded to main surface 120 (as shown), be bonded to 115 (not shown) of light-emitting area or be bonded to the two and (do not shown
Out).Although Fig. 3 A-B shows the photo-absorption region as separated layer, LGP can also be processed into generation and integrate light suction
Region is received, it is as follows to be discussed more fully.In addition, although Fig. 3 A-B shows that an only light source 105 is optically coupled to one of LGP
Edge, it is to be appreciated that, multiple light sources can be coupled to an edge or more than one edge of LGP.Such
In the case of, the position of bands absorption can be close to any edge for being optically coupled to light source.For example, LGP may include two or
More light incident edges, and the position of diffusion reflective tape can be close to each light incident edge.
LGP 110,110' may include any materials known in the art for display equipment.For example, LGP can be with
Including plastics (for example, polymethyl methacrylate (PMMA)) or glass (for example, alumina silicate glass, alkali alumino-silicates
Glass, borosilicate glass, alkaline borosilicate glass, aluminium borosilicate glass, alkaline aluminium borosilicate glass, sodium calcium glass
Glass or other suitable glass).The non-limitative example for being suitable as the commercially available glass of LGP has including for example healthy and free from worry
The EAGLE of limit company (Corning Incorporated)LotusTM、IrisTMAndGlass
Glass.
Some non-limiting glass compositions may include: the SiO of about 50 moles of % to about 90 moles of %2, 0 mole of % extremely
The Al of about 20 moles of %2O3, 0 mole of % to about 20 moles of % B2O3And the R of 0 mole of % to about 25 moles of %xO, wherein R is
Any one or more in Li, Na, K, Rb, Cs, and x be 2 or R be in Zn, Mg, Ca, Sr or Ba any one or
It is a variety of, and x is 1.In some embodiments, RxO-Al2O3>0；0<RxO-Al2O3<15；X=2 and R2O-Al2O3<15；
R2O-Al2O3<2；X=2 and R2O-Al2O3-MgO>-15；0<(RxO-Al2O3) < 25, -11 < (R2O-Al2O3) < 11, and -15 <
(R2O-Al2O3-MgO)<11；And/or -1 < (R2O-Al2O3) < 2 and -6 < (R2O-Al2O3- MgO) < 1, the unit of all values is all
Mole %.In some embodiments, glass includes each of Co, Ni and Cr less than about 1ppm.In some embodiment party
In formula, the concentration of Fe is less than about 50ppm, is less than about 20ppm or is less than about 10ppm.In other embodiments, Fe+30Cr
+ 35Ni < about 60ppm, Fe+30Cr+35Ni < about 40ppm, Fe+30Cr+35Ni < about 20ppm or Fe+30Cr+35Ni < about
10ppm.In other embodiments, glass includes: the SiO of about 60 moles of % to about 80 moles of %2, about 0.1 mole of % is to about
The Al of 15 moles of %2O3, the B of 0 mole of % to about 12 moles of %2O3, and the R of about 0.1 mole of % to about 15 moles of %2O peace treaty
The RO of 0.1 mole of % to about 15 moles of %, wherein R is any one or more in Li, Na, K, Rb, Cs, and x is 2, or
Person R is any one or more in Zn, Mg, Ca, Sr or Ba, and x is 1.
In other embodiments, glass composition may include: about 65.79 moles of % to about 78.17 moles of %SiO2,
About 2.94 moles of % to about 12.12 moles of %Al2O3, about 0 mole of % to about 11.16 moles of %B2O3, about 0 mole of % is to about
2.06 mole %Li2O, about 3.52 moles of % to about 13.25 moles of %Na2O, about 0 mole of % to about 4.83 moles of %K2O, about 0
Mole % to about 3.01 moles of %ZnO, about 0 mole of % to about 8.72 moles of %MgO, about 0 mole of % to about 4.24 moles of %
CaO, about 0 mole of % to about 6.17 moles of %SrO, about 0 mole of % to about 4.3 moles of %BaO, and about 0.07 mole of % is to about
0.11 mole of %SnO2。
In other embodiments, glass composition may include: RxO/Al2O3The ratio between be 0.95 to 3.23, wherein R is
Any one or more and x in Li, Na, K, Rb, Cs are 2.In other embodiments, glass composition may include:
RxO/Al2O3The ratio between be 1.18 to 5.68, wherein R is that any one or more and the x in Li, Na, K, Rb, Cs are 2；Or
Person R is that any one or more and the x in Zn, Mg, Ca, Sr or Ba are 1.In other embodiments, (with a mole % table
Show) the glass composition R that includesxO、Al2O3And the amount of MgO makes: RxO–Al2O3- MgO is -4.25 to 4.0, wherein R is
Any one or more and x in Li, Na, K, Rb, Cs are 2.In some other embodiments, glass composition can be with
Include: about 66 moles of % to about 78 moles of %SiO2, about 4 moles of % to about 11 moles of %Al2O3, about 4 moles of % to about 11 rub
You are %B2O3, about 0 mole of % to about 2 moles of %Li2O, about 4 moles of % to about 12 moles of %Na2O, about 0 mole of % to about 2 rub
You are %K2O, about 0 mole of % to about 2 moles of %ZnO, about 0 mole of % to about 5 moles of %MgO, about 0 mole of % to about 2 moles of %
CaO, about 0 mole of % to about 5 moles of %SrO, about 0 mole of % to about 2 moles of %BaO, and about 0 mole of % to about 2 moles of %
SnO2。
In other embodiments, glass composition may include: about 72 moles of % to about 80 moles of %SiO2, about 3 rub
You are % to about 7 moles of %Al2O3, about 0 mole of % to about 2 moles of %B2O3, about 0 mole of % to about 2 moles of %Li2O, about 6 rub
You are % to about 15 moles of %Na2O, about 0 mole of % to about 2 moles of %K2O, about 0 mole of % to about 2 moles of %ZnO, about 2 moles of %
To about 10 moles of %MgO, about 0 mole of % to about 2 moles of %CaO, about 0 mole of % to about 2 moles of %SrO, about 0 mole of % is to about
2 moles of %BaO, and about 0 mole of % to about 2 moles of %SnO2.In some embodiments, glass composition may include: about
60 moles of % to about 80 moles of %SiO2, about 0 mole of % to about 15 moles of %Al2O3, about 0 mole of % to about 15 moles of %B2O3、
About 2 moles of % to about 50 moles of %RxO, wherein R is any one or more in Li, Na, K, Rb, Cs and x is 2, or
R is any one or more in Zn, Mg, Ca, Sr or Ba and x is 1, and wherein, Fe+30Cr+35Ni < about 60ppm.
In some embodiments, LGP 110,110' may include the gamut Δ y less than 0.030, for example, about 0.005
To about 0.03 (for example, about 0.005,0.006,0.007,0.008,0.009,0.010,0.011,0.012,0.013,0.014,
0.015,0.020,0.025 or 0.030).In other embodiments, LGP may include (being, for example, less than less than 0.015
0.008) gamut.According to certain embodiments, for the wave-length coverage of about 420-750nm, LGP be can have less than about 4dB/
The optical attenuation α of m1(for example, due to absorb and/or scattering loss cause), for example, be less than about 3dB/m, less than about 2dB/m, be less than
About 1dB/m, less than about 0.5dB/m, less than about 0.2dB/m or be even less than for example, about 0.2dB/m to about 4dB/m range.
In various embodiments, the refractive index of LGP can be following range: about 1.3 to about 1.8, such as: about 1.35 to about 1.7, about
1.4 to about 1.65, about 1.45 to about 1.6 or about 1.5 to about 1.55, including therebetween all ranges and subrange.
In some embodiments, chemical strengthening can be carried out to LGP 100,110' for example, by ion exchange.From
During sub- exchange process, ion at the glass sheet surface in sheet glass or at the glass sheet surface can by for example from
The larger metal ion exchanged of salt bath.Larger ions binding is into glass, by generating compression stress meeting in its near-surface region
Sheet material is strengthened.Corresponding tensile stress can be induced in the central area of sheet glass, with balanced compressive stress.
It can be for example, by carrying out ion exchange for predetermined time period is continued in glass immersion molten salt bath.Exemplary salt
Bath includes but is not limited to: KNO3、LiNO3、NaNO3、RbNO3, and combinations thereof.Depth needed for can depending on compressive stress layers
And size, to change temperature and the processing period of molten salt bath.Those skilled in the art has the ability to be determined according to required application
Time and temperature.As non-limitative example, the temperature of molten salt bath can be about 400 DEG C to about 800 DEG C (for example, about 400 DEG C extremely
About 500 DEG C), and scheduled duration can be about 4 hours to about 24 hours (for example, about 4 hours to 10 hours), but
It is the combination for also considering other temperature and times.As non-limitative example, glass can be immersed in KNO3In bath, for example,
At about 450 DEG C for about 6 hours, to obtain the K enriched layer for imparting surface compression stress.
In some embodiments, LGP 100,110' thickness can be less than or equal to about 3mm, for example, about 0.1mm is extremely
About 2.5mm, about 0.3mm are to about 2mm, about 0.5mm to about 1.5mm or about 0.7mm to about 1mm, including all ranges therebetween
And subrange.LGP 100,110' length can also depend on application change, for example, be suitable for small handheld device
Or giant display (for example, billboard).It, either can greatly to 10m or even for example, the length of LGP can be as small as 1mm
It is bigger.In some embodiments, LGP length can be about 10mm to about 1m, for example, about 50mm is to about 500mm, about 100mm
To about 400mm or about 200mm to about 300mm, including therebetween all ranges and subrange.
LGP 100,110' can have any required size and/or shape, suitably to generate required light distribution.
In some embodiments, main surface 115,120 can be flat or substantially flat and/or can be parallel or base
This is parallel.LGP 100,110' may include 4 edges, or may include more than 4 edges, for example, more side polygons.
In other embodiments, LGP 100,110' may include less than 4 edges, such as triangle.As non-limitative example,
LGP may include rectangle, square or trhomboid sheet material with 4 edges, but other shapes and construction are also intended to and fall
Enter in the scope of the present disclosure, including there are one or more those of curved portions or edge.
In the case where chamferring LGP 110', inclined-plane scale can be selected, to be appropriately carried out required coupling
Close efficiency, display architectures, and/or light distribution.In some embodiments, bevel altitude H can be about 0.01mm to about
1mm, for example, about 0.05mm to about 0.9mm, about 0.1mm are to about 0.8mm, about 0.2mm to about 0.7mm, about 0.3mm to about
0.6mm or about 0.4mm to about 0.5mm, including therebetween all ranges and subrange.Similarly, angle of chamfer θ can depend on
In LGP construction change, for example, about 5 ° to about 60 °, about 8 ° to about 50 °, about 10 ° to about 45 °, about 15 ° to about 40 °, about
20 ° to about 30 °, including therebetween all ranges and subrange.
In some embodiments, LGP and/or optical bond layer can be transparent or substantial transparent.As herein
Used, term " transparent " is intended to indicate that: in 1mm thickness, LGP and/or optical bond layer are in visible spectral range (about 420-
750nm) there is greater than about 80% light transmittance.For example, exemplary transparent material can have greater than about in visible-range
85% transmissivity is greater than the transmissivity of about 90%, greater than about 95% or greater than about 99%, including owning therebetween
Range and subrange.In some embodiments, exemplary transparent material can in the length greater than or equal to about 500mm
Visible-range has greater than about 30% light transmittance, be greater than about 50%, greater than about 60% or greater than about 70% it is saturating
Light rate, including therebetween all ranges and subrange.
In some embodiments, exemplary transparent material may include less than about each in Co, Ni and Cr of 1ppm
It is a.In some embodiments, the concentration of Fe is less than about 50ppm, is less than about 20ppm or is less than about 10ppm.In other realities
It applies in mode, Fe+30Cr+35Ni < about 60ppm, Fe+30Cr+35Ni < about 40ppm, Fe+30Cr+35Ni < about 20ppm, or
Fe+30Cr+35Ni < about 10ppm.According to other embodiments, exemplary transparent material may include gamut Δ y < 0.015, or
Person in some embodiments, including gamut Δ y < 0.008.
Gamut can characterize in the following way: using 1931 standard of CIE for being used for color measuring, measure along length L
Variation in x and/or y chromaticity coordinate.For glass light guide plate, gamut Δ y be can recorde as Δ y=y (L2)-y(L1), in formula,
L2And L1It is L in the panel in direction or the Z location of substrate and formula along separate source transmitting2-L1=0.5 meter.It is exemplary
LGP or optical bond layer can have Δ y < 0.01, Δ y < 0.005, Δ y < 0.003 or Δ y < 0.001.
Although being not shown in fig. 1-3, LGP 110, the light-emitting area 115 of 110' and/or corresponding main surfaces 120 can
To have patterned multiple extraction features.As used herein, term " patterning " is intended to indicate that the multiple light extraction features
Part is present on the surface of LGP or in surface with any given pattern or design, this can be for example, randomly or by arrangement
, it is repeated or non-repeatability, uniformly or non-uniformly.In other embodiments, extraction feature can be located at LGP
By the Medium Culture of near surface, for example, under the surface.For example, extraction feature can be distributed on the surface, for example, as knitting
Structure feature, constituting roughened surface perhaps raised surface or can be distributed in entire substrate or part thereof, example
Such as, as laser induced feature.
In various embodiments, the extraction feature being optionally present on the surface of LGP may include light scattering
Point.In other embodiments, the extraction feature being optionally present on the surface of LGP may include refraction structure,
Its total internal reflection condition for having broken LGP.The non-limitative example of the shape of these refractive features may include: hemispherical,
Toroid or ellipsoidal shape.According to various embodiments, suitable density can be patterned to by extracting feature, thus
Substantially homogeneous light output intensity is generated on the light-emitting area of LGP.In some embodiments, by the light extraction features of close to sources
The density of part can be lower than the extraction feature density (or vice versa) in the point more far from light source, for example, from LGP
One end to the other end in gradient, to suitably generate required light output distribution on LGP.
Generate such extraction feature appropriate method may include: printing (for example, ink jet printing, silk-screen printing and
It is micro- printing etc.), texturing, it is mechanically roughened, etching, injection molding, coating, laser damage, or any combination thereof.Such method it is non-
Limitative examples include for example: carrying out acid etching to surface, use TiO2Coating surface, by the way that laser is focused on surface or
It focuses on LGP Medium Culture and laser damage is carried out to substrate.It can also be according to co-pending and jointly owned international patent application
Number revealed any means of PCT/US2013/063622 and PCT/US2014/070771 generate extraction feature, complete
Text is incorporated into this article by reference respectively.
Optical bond layer 135 may include times known in the art for being suitable for being laminated reflector and glass or plastics LGP
Meaning material.For example, in some embodiments, optical bond layer may include at least one material selected from the group below: epoxidation
Object, photosensitive polymer, carbamate, silicone, cyanoacrylate, material and similar material based on polyester resin.Light
The exemplary thickness for learning adhesive layer can be following range, and for example, about 10 μm to about 500 μm, for example, about 20 μm to about 400 μm, about
30 μm to about 300 μm, about 40 μm to about 200 μm or about 50 μm to about 100 μm, including all ranges and subrange therebetween.
According to various embodiments, the refractive index (n of optical bond layer 135OB) can refractive index (n than LGPLGP) small
At least 7%.In other embodiments, nOBN can be comparedLGPIt is small by least 10%, for example, at least 13% or at least 15%, packet
Include all ranges and subrange therebetween.For example, the refractive index of optical bond layer can in the case where the refractive index of LGP is 1.7
With less than about 1.6, for example, about 1.55 to about 1.45 or even lower.As non-limitative example, the refraction of optical bond layer
Rate can be less than 1.7, for example, about 1.3 to about 1.65, and about 1.35 to about 1.6, about 1.4 to about 1.55, or about 1.45 to about
1.5, including therebetween all ranges and subrange.As discussed above, optical bond layer can be is in visible wavelength
Bright.For example, optical bond layer can be with (for example, the transmission more than or equal to 500mm be apart from upper) on certain length in visible light
Range has greater than about 30% light transmittance, is greater than about 50%, greater than about 60% or greater than about 70%, including therebetween
All ranges and subrange.
As shown in Figure 1-3, guide-lighting assembly parts 100,100' may include at least one layer of reflective layer, for example, diffusion reflector layer
130 and/or reflective layer 140.Reflecting layer 140 can be specular reflector or diffusion reflector.According to various embodiments, it overflows
Penetrating reflective layer 130 may include material selected from the group below: polytetrafluoroethylene (PTFE) (PTFE) optical diffuser film, diffusive polystyrene
Film, diffusive acrylic polymer film and blank sheet of paper layer etc..Reflective layer 140 may include for example following material, such as: it is organic
Or inorganic multilayer optical film, metal foil and similar material.Diffusion reflector layer 130 and/or reflective layer 140 can be in visible lights
Wavelength has reflectivity greater than or equal to about 90%, such as: greater than or be equal to about 92%, 95%, 96%, 97%, 98%,
99% or 100%, including therebetween all ranges and subrange, for example, 90% to 100% reflectivity.
And for specular reflector, for example, reflective layer 140 can have compared with smooth surface, reflector is diffused (for example, anti-
Photosphere 130) it can have or be processed into offer roughened surface.According to various embodiments, diffusion reflector layer 130 can be with
It is Lambertian reflector.In other embodiments, the feature of diffusion reflector layer 130 can be 3-dB angle of scattering greater than or equal to about
80 degree, for example, being greater than or equal to 85 degree, 90 degree, 95 degree, 100 degree, 105 degree, 110 degree, 115 degree, 120 degree, or times therebetween
Range of anticipating or subrange, such as: about 80 degree to about 120 degree.The feature of diffusion reflector layer 130 can also be Sigma's scattering parameter
Greater than or equal to about 1, for example, about 2 to about 5 or the Gauss scattering function of about 3 to about 4, including therebetween all ranges and son
Range.
As shown in figs. 1A-b, diffusion reflector layer 130 can cover entire or substantially entire main surface 120.Alternatively, such as
Shown in Fig. 2A-B, reflective layer 140 (for example, mirror reflective layer or diffusion reflector layer) can cover the first area of main surface 120,
And diffusion reflector layer 130 can cover the second area by dipped beam incident edge 125.In some embodiments, it diffuses reflective
Layer 130 can extend scheduled distance from light incident edge towards opposite edges, for example, having width W to be formedDDiffusion
Band.In some embodiments, the width W of such bandDIt can be about 2mm to about 15mm, for example, about 3mm to about 12mm, about
4mm to about 10mm, about 5mm to about 8mm or about 6mm to about 7mm, including therebetween all ranges and subrange.If to lean on
If the band forms of dipped beam incident edge 125 exist, diffusion reflector layer 130 can have any appropriate shape, to provide
The light distribution needed, including but not limited to: rectangle, square and other any rules or irregular shape, without limiting, example
Such as, with the shape of curved edge.
Referring to Fig. 3 A-B, light guide assembly parts 100,100' can also include the photo-absorption region by dipped beam incident edge 125.
Such absorption region can be used as the presence of light-absorption layer 150, can reside in luminous main surface 115 (not shown) or can be with
It is present in corresponding main surfaces 120 (as shown).Suitable material for such light-absorption layer 150 can include but is not limited to: carbon,
Carbon nanotube, carbon black, carbon black filled polymer (for example, acrylate, polypropylene, epoxides etc.), black pigment, and its
Combination.As an alternative or supplement, LGP 110,110' can handle into the photo-absorption region for generating integration, for example, by by one
It is long wavelength UV light of the about 193nm to about 250nm that partial LGP, which is exposed to wave-length coverage,.LGP can be exposed to selected wavelength
Persistently it is enough to induce the period to form color center on the surface of LPG or close to the surface of LGP.It is then possible to by LGP and
Light source is placed relative to each other so that treated photo-absorption region leans on close to sources.It is anti-that reflecting layer 140 can be mirror surface
Emitter or diffusion reflector.
Absorption region (for example, light-absorption layer 150 and/or integration absorption region) can visible wavelength have be greater than or
Absorptivity equal to about 80%, such as: greater than or be equal to about 85%, 90%, 95%, 99% or 100%, including institute therebetween
There are range and subrange, for example, 80% to 100% absorptivity.In some embodiments, photo-absorption region can be from light incidence
Edge extends scheduled distance towards opposite edges, for example, having width W to be formedAAbsorption band.In certain embodiments
In, the width W of such bandACan be about 2mm to about 15mm, for example, about 3mm to about 12mm, about 4mm to about 10mm, about 5mm extremely
About 8mm or about 6mm to about 7mm, including therebetween all ranges and subrange.Photo-absorption region can have any appropriate
Shape, with the light distribution needed for providing, including but not limited to: rectangle, square and other any rules or irregular shapes
Shape, without limiting, for example, the shape with curved edge.
LGP disclosed herein can be used for various display equipments, including but not limited to LCD.Example comprising such LGP
Property device includes television set, computer, mobile phone, plate and other display panels.According to the various embodiments of the disclosure, display
Device device may include be coupled to (blue light, UV light or nearly UV light can be emitted, for example, about 100-500nm) at least one
At least one of LGP 110,110' disclosed herein of light source 105.In some embodiments, light source 105 can be
Lambertian source, such as light emitting diode (LED).
The height h of light source 105 (for example, the thickness for depending on LGP) can change on demand.According to non-limiting implementation
Mode, light source can have following height: less than 5mm, for example, about 0.5mm to about 5mm, about 1mm are to about 4mm or about 2mm
To about 3mm, including therebetween all ranges and subrange.In some embodiments, light source 105 can relative to LGP 110,
110' is positioned so that between the two components, there are clearance Gs.The distance range in such gap can be for example, about 0.01mm
To about 1mm, such as: about 0.05mm to about 0.9mm, about 0.1mm to about 0.8mm, about 0.2mm to about 0.7mm, about 0.3mm are to about
0.6mm or about 0.4mm are to about 0.5mm, including all ranges therebetween.
The optical module of exemplary L CD may also include reflector, diffusing globe, one or more prism films, one or more
Linear or reflective polarizer, thin film transistor (TFT) (TFT) array, liquid crystal layer and one or more colour filters and other components.
LGP disclosed herein can also be used in various lighting devices (light source or solid luminous device) and constracture unit (for example, advertisement
Board).
It will be appreciated that, revealed various embodiments can be related to the specific spy being described together with particular implementation
Sign, element or step.Although it will further be understood that describing specific features, element or step in conjunction with a specific embodiment
Suddenly, but different embodiments can be exchanged with each other or be combined with various unshowned combinations or variation.
It will further be understood that the term as used herein "the", "one" or "an" indicate " at least one (one kind) ", no
It should be limited as " only one (one kind) ", except non-clearly there is opposite explanation.Thus, for example, " a kind of light source " mentioned includes tool
There are two types of or more such light source example, unless the context clearly indicates otherwise.Similarly, " multiple " or " array "
It is intended to indicate that " more than one ".Thus, " multiple extraction features " or " array of extraction feature " include two or
More this class components, for example, 3 or more this class components etc..
Herein, range can be expressed as from " about " occurrence and/or to " about " another occurrence range and/
Or value " between ".When stating this range, example includes stopping from a certain occurrence beginning and/or to another occurrence.It is similar
Ground, when indicating that numerical value is approximation using antecedent " about ", it should be appreciated that specific value is constituted on the other hand.It will also be appreciated that
, the endpoint value of each range is all meaningful when unrelated in relation to and with another endpoint value with another endpoint value.
Terms used herein " basic ", " substantially " and its version are intended to indicate that described feature and numerical value or retouch
It states mutually equivalent or approximately uniform.For example, " substantially flat " surface is intended to indicate that flat or near flat surface.In addition, as above
Text is defined, and " substantially similar " is intended to indicate that two values are equal or approximately equal.In some embodiments, " base
It is similar in sheet " numerical value can be indicated mutually within about 10%, such as mutually within about 5%, or mutually about 2%
Within.
Unless otherwise stated, it is otherwise all not intended to and is interpreted as any means as described herein to need to make its step with specific
Sequence carries out.Therefore, it is set fourth as that its step follows certain sequence or it does not exist when claim to a method is practically without
It specifically indicates that step is limited to specific sequence in claims or specification with any other modes, is all not intended to imply that this
Meaning particular order.
Although can be managed with interlanguage " comprising " come various features, element or the step of open particular implementation
Solution, which imply include can be used interlanguage " by ... constitute ", " substantially by ... constitute " describe including replace
For embodiment.Thus, for example, including device by A+B+C group to the implicit alternative embodiment of the device comprising A+B+C
At the embodiment that is mainly made of A+B+C of embodiment and device.
It will be apparent to those skilled in the art can be without departing from the scope of the present disclosure and spirit
In the case of the disclosure is carry out various modifications and is changed.Because those skilled in the art is contemplated that melting for the embodiment
Various improved combinations, subitem combination and the variation of disclosure spirit and essence are closed, it is considered that herein include appended claims
Full content and its equivalent within the scope of book.
Following embodiment is non-limiting and is only schematically, and the scope of the present invention is limited by claims
It is fixed.
Embodiment
Embodiment 1: diffusion reflector layer
Fig. 4 A shows the light distribution along LGP, and the LGP does not have inclined-plane (thickness=2mm；Width=10mm；Length=
502mm；nLGP=1.5), pass through optical bond layer (thickness=40 μm；nOB=1.35) it is laminated to specular back reflector
(96% reflectivity).Light source (LED；Highly=1mm) be placed on LGP feather edge center, as indicated, and distance LGP be
The gap 0.1mm.Fig. 4 B similarly shows the light distribution along LGP, and the LGP does not have inclined-plane, is laminated to diffusion rear reflector,
Other parameters are consistent.In Figure 4 A, for being laminated to the LGP of specular reflector, it can be seen that lean on dipped beam incident edge (bottom edge
Edge) bright band.On the contrary, Fig. 4 B shows the LGP for being laminated to diffusion reflector, the bright band at feather edge is eliminated.May be used also
With the comparison between as can be seen from Figure 5 Fig. 4 A-B, diagram is depicted for specular reflector (A) and diffusion reflector (B), brightness
Relationship between the distance of the light incident edge of distance LGP.It is also apparent that, it is anti-to be laminated to mirror surface from the figure line of Fig. 5
The LGP of emitter is generated bright band (in LED region, the brightness elsewhere compared to LGP increases), the bright band from
The light incident edge of LGP extends approximation about 100mm.
Fig. 6 A-B and Fig. 7 A-B present specular reflector and diffuse reflector between additional comparison, which show along
Luminance difference and the distance between LGP and LED between two positions (being 10mm and 500mm apart from light incident edge) of LGP
Relationship, wherein when eliminating the gap between LED and LGP, G=0.As luminance difference is close to zero, the light from LGP is defeated
Become out more uniformly, for example, having reduced or eliminated bright band effect.Fig. 6 A confirms viscous by the optics with different refractivity
Tie layer (nOB=1.35 (C), nOB=1.30 (D)；nOB=1.25 (E)) be laminated to specular reflector do not have that bevelled LGP's is bright
Spend correlation curve.For such LGP, at G=0, for nOB=1.35,1.30 and 1.25 the case where, luminance difference are respectively
23%, 16% and 8%.Fig. 6 B is confirmed through the optical bond layer (n with different refractivityOB=1.35 (F), nOB=
1.30(G)；nOB=1.25 (H)) it is laminated to the brightness contrast curve for not having bevelled LGP of diffusion reflector.By with diffusion
Reflector replaces specular reflector, for nOB=1.35,1.30 and 1.25 the case where, luminance difference drops into respectively at G=0
4.3%, 2.7% and 0.9%.From the beveling LGP (beveling height=0.2mm for being laminated to specular reflector；Angle of chamfer=45 °)
Similar comparison can be drawn out with the beveling LGP for being laminated to diffusion reflector, as shown in figs. 7 a-b (nOB=1.35 (I, L), nOB
=1.30 (J, M), nOB=1.25 (K, N)).
For two kinds of situations shown in Fig. 6 A-B and Fig. 7 A-B, as the gap between LED and LGP increases, luminance difference is all
Reduce.Compared to not having bevelled LGP (Fig. 6 A-B), chamfer the luminance difference of LGP (Fig. 7 A-B) with gap increase slightly more
Reduce fastly.But increase the gap between light source and LED may inevitably result in broader inclined-plane covered from user's sight it is aobvious
Show device assembly.In addition, as shown in figure 8, for two kinds of LGP (H=0mm (O), H=0.3mm (P), H with and without inclined-plane
=0.5mm (Q)), increase the gap between LED and LGP and also results in coupling efficiency reduction.
Fig. 9 characterizes the scattering property of reflector using Gaussian function, it was confirmed that with different Sigma's scattering parameters
Diffuse the scattered power of reflector.Sigma's parameter represents specular angle distribution for 0, and Sigma's parameter is that 5 representatives are close
Lambert's angular distribution.Figure 10 is turned to, is depicted for optics adhesive layer (nOB=1.35) it is laminated to not having for diffusion reflector
The LGP on inclined-plane, along LGP two positions (apart from light incident edge be 10mm and 500mm) between luminance difference and LGP and
The relationship of the distance between LED.It can be seen from the figure that when Sigma's parameter of reflector increases to 1 from 0 (mirror surface), it is bright
Degree difference from 28% drops to 6.4%, when Sigma's parameter increase to 2 and it is higher when (close to lambert), luminance difference further declines
To less than 5%.
Embodiment 2: diffusion reflective tape
Figure 11 is depicted at dipped beam incident edge with or without diffusion reflector bands, for stacking
Do not have bevelled LGP to specular reflector, along LGP two positions (apart from light incident edge be 10mm and 500mm) it
Between luminance difference and diffusion reflector bands width relationship.Pass through the optical bond layer (n with different refractivityOB=1.35
(R), nOB=1.30 (S)；nOB=1.25 (T)) reflector layer is laminated to LGP.For all three situations, as diffusion is reflected
The increase of device bandwidth, luminance difference reduce.For the LGP of no diffusion reflector bands, for nOB=1.35,1.30 and
1.25 the case where, luminance difference are 22.8%, 14.8% and 7.8% respectively.Respectively, for nOB=1.35,1.30 and 1.25
The case where, when diffusing reflector bands width greater than 8mm, 5.8mm and 2.4mm, luminance difference is dropped into lower than 5%.
Embodiment 3: bands absorption
Figure 12 A is depicted in the case where applying at dipped beam incident edge to LGP or without applying bands absorption, for layer
Be laminated to specular reflector does not have bevelled LGP, along two positions (being 10mm and 500mm apart from light incident edge) of LGP
Between luminance difference and extinction bandwidth relationship.Pass through the optical bond layer (n with different refractivityOB=1.35 (U),
nOB=1.30 (V)；nOB=1.25 (W)) reflector layer is laminated to LGP.For all three situations, with extinction bandwidth
Increase, luminance difference reduces.For the LGP of not bands absorption, for nOB=1.35,1.30 and 1.25 the case where, brightness difference
It is not 22.8%, 14.8% and 7.8%.Respectively, for nOB=1.35,1.30 and 1.25 the case where, when diffusion reflector
When bandwidth is greater than 5mm, 4mm and 1.7mm, luminance difference is dropped into lower than 5%.
Figure 12 B depict for be 1.35 by refractive index optical bond layer will not have bevelled LGP to be laminated to have
The case where specular reflector (a=50% (X), a=95% (Y), a=100% (Z)) of different absorptivities, along two of LGP
The relationship of luminance difference and extinction bandwidth between position (being 10mm and 500mm apart from light incident edge).It can be with from figure
, it is evident that band is deteriorated for reducing the effect of bright band as band absorptivity reduces.For example, 50% absorbs at 8mm bandwidth
The band of rate has 11% luminance difference, and the luminance difference of the band of 100% absorptivity is 2%.But it is absorbed 95% and 100%
The rate of influence between to(for) luminance difference is relatively minimal.
Figure 12 C, which is depicted, does not have bevelled LGP for being laminated to diffusion reflector, along two position (distances of LGP
The relationship of luminance difference and extinction bandwidth of the light incident edge between 10mm and 500mm).Pass through the light with different refractivity
Learn adhesive layer (nOB=1.35 (AA), nOB=1.30 (BB)；nOB=1.25 (CC)) reflector layer is laminated to LGP.For not inhaling
The LGP of light belt, for nOB=1.35,1.30 and 1.25 the case where, luminance difference are 4%, 2.7% and 0.9% respectively.Respectively
Ground, for nOBIt is=1.35,1.30 and 1.25 the case where, bright when diffusing reflector bands width greater than 5mm, 4mm and 1.7mm
Degree difference is dropped into lower than 5%.By the inclusion of the bands absorption of 6mm, for nOB=1.35,1.30 and 1.25 the case where, brightness difference
2.5%, 1.9% and 0.7% is not dropped into.For all three situations, with the increase of absorption band width, luminance difference drop
It is low.But compared to Figure 12 A (specular reflector), difference is less obvious, because improving brightness by diffusing reflector
Uniformity.
Claims (23)
1. a kind of light guide assembly parts comprising:
(a) light guide plate comprising shine main surface, corresponding main surfaces and at least one light incident edge；With
(b) diffusion reflector layer of at least part of corresponding main surfaces of light guide plate, institute are bonded to by optical bond layer
State the refractive index that the refractive index that optical bond layer includes is lower than light guide plate.
2. light guide assembly parts as described in claim 1, which is characterized in that diffusion reflector layer is bonded to the substantially whole of light guide plate
A corresponding main surfaces.
3. light guide assembly parts as described in claim 1, further include be bonded to light guide plate the corresponding main surfaces first
The reflective layer in region, wherein the diffusion reflector layer is bonded to the corresponding main surfaces close at least one described light emitting edge
The second area of edge.
4. light guide assembly parts as described in claim 1 comprising two or more light incident edges and at least one diffusion
Reflective layer, at least one described diffusion reflector layer are bonded to the corresponding main surfaces close to the two or more smooth emitting edges
The region of edge.
5. light guide assembly parts as described in claim 3 or 4, which is characterized in that the width of the diffusion reflector layer be about 2mm extremely
About 15mm.
6. light guide assembly parts as claimed in claim 3, which is characterized in that the reflective layer is mirror surface or diffusion.
7. light guide assembly parts as described in any one of the preceding claims, which is characterized in that the diffusion reflector layer include with
Lower at least one: greater than or the 3-dB angle of scattering equal to about 80 degree, or Sigma's scattering parameter greater than or equal to about 1.
8. light guide assembly parts as described in any one of the preceding claims, which is characterized in that the diffusion reflector layer is visible
The reflectivity of optical wavelength is at least about 95%.
9. light guide assembly parts as described in any one of the preceding claims, which is characterized in that the refraction of the optical bond layer
Rate lower than the refractive index of light guide plate at least about 7%.
10. light guide assembly parts as described in any one of the preceding claims, which is characterized in that for greater than or equal to about
The length of 500mm, the optical bond layer are at least about 30% in the light transmittance of visible wavelength.
11. light guide assembly parts as described in any one of the preceding claims, which is characterized in that light guide plate it is described at least one
Light incident edge includes at least one inclined-plane.
12. a kind of light guide assembly parts comprising:
(a) light guide plate comprising shine main surface, corresponding main surfaces and at least one light incident edge；
(b) reflective layer of at least part of corresponding main surfaces of light guide plate, the light are bonded to by optical bond layer
Learn the refractive index that the refractive index that adhesive layer includes is lower than light guide plate；With
(c) close to the photo-absorption region of at least one light incident edge of light guide plate.
13. light guide assembly parts as claimed in claim 12 comprising two or more light incident edges and at least one light
Absorption region, at least one described photo-absorption region is close to the two or more smooth incident edges.
14. light guide assembly parts as claimed in claim 12, which is characterized in that the photo-absorption region includes being bonded to light guide plate
Luminous main surface or at least one of corresponding main surfaces light-absorption layer.
15. light guide assembly parts as claimed in claim 14, which is characterized in that the reflective layer is bonded to the phase of light guide plate
First area and the light-absorption layer to main surface be bonded to it is following at least one: the corresponding main surfaces of (i) light guide plate
The second area close at least one light incident edge, or (ii) light guide plate luminous main surface close to it is described extremely
The third region of a few light incident edge.
16. the light guide assembly parts as described in any one of claim 12-15, which is characterized in that the width of the photo-absorption region
Degree is about 2mm to about 15mm.
17. the light guide assembly parts as described in any one of claim 12-16, which is characterized in that the photo-absorption region is can
The absorptivity of light-exposed wavelength is at least about 80%.
18. the light guide assembly parts as described in any one of claim 12-17, which is characterized in that the reflective layer be mirror surface or
Diffusion.
19. the light guide assembly parts as described in any one of claim 12-18, which is characterized in that the folding of the optical bond layer
Penetrate rate lower than the refractive index of light guide plate at least about 7%.
20. the light guide assembly parts as described in any one of claim 12-19, which is characterized in that for greater than or equal to about
The length of 500mm, the optical bond layer are at least about 30% in the light transmittance of visible wavelength.
21. the light guide assembly parts as described in any one of claim 12-20, which is characterized in that described at least the one of light guide plate
A light incident edge includes at least one inclined-plane.
It further include be optically coupled to light guide plate described 22. light guide assembly parts as described in any one of the preceding claims
At least one light source of at least one light incident edge.
23. a kind of display, luminous or electronic device comprising light guide assembly as described in any one of the preceding claims
Part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662397441P | 2016-09-21 | 2016-09-21 | |
| US62/397,441 | 2016-09-21 | ||
| PCT/US2017/051478 WO2018057380A1 (en) | 2016-09-21 | 2017-09-14 | Edge-lit light guide plates and devices comprising the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109716019A true CN109716019A (en) | 2019-05-03 |
Family
ID=59955719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780058027.8A Withdrawn CN109716019A (en) | 2016-09-21 | 2017-09-14 | Edge-lit light guide plate and device comprising it |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2019530162A (en) |
| KR (1) | KR20190053251A (en) |
| CN (1) | CN109716019A (en) |
| TW (1) | TW201814340A (en) |
| WO (1) | WO2018057380A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112015007A (en) * | 2020-09-15 | 2020-12-01 | 武汉华星光电技术有限公司 | Backlight module and display device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210101771A (en) * | 2020-02-11 | 2021-08-19 | 코닝 인코포레이티드 | Shelf lighting device |
| US11657670B2 (en) | 2021-03-16 | 2023-05-23 | Aristocrat Technologies, Inc. | Segmented display assembly for gaming device |
| PL439803A1 (en) * | 2021-12-10 | 2023-06-12 | Uniwersytet W Białymstoku | Edge-lit patterned display for use in visual evoked potential testing with simultaneous magnetic resonance imaging |
| WO2023215140A1 (en) * | 2022-05-06 | 2023-11-09 | Corning Incorporated | Display device including a backlight unit with chamfered diffuser plate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002829A (en) * | 1992-03-23 | 1999-12-14 | Minnesota Mining And Manufacturing Company | Luminaire device |
| JP2004179116A (en) * | 2002-11-29 | 2004-06-24 | Alps Electric Co Ltd | Back illumination device and liquid crystal display |
| JP2009204885A (en) * | 2008-02-28 | 2009-09-10 | Omron Corp | Display device |
| WO2013137161A1 (en) * | 2012-03-15 | 2013-09-19 | シャープ株式会社 | Lighting device and display device provided with same |
| US9494726B2 (en) * | 2014-05-27 | 2016-11-15 | Microsoft Technology Licensing, Llc | Switchable backlight unit |
| KR20170066318A (en) * | 2014-08-12 | 2017-06-14 | 글로 에이비 | Integrated back light unit including non-uniform light guide unit |
-
2017
- 2017-09-14 WO PCT/US2017/051478 patent/WO2018057380A1/en active Application Filing
- 2017-09-14 JP JP2019515404A patent/JP2019530162A/en active Pending
- 2017-09-14 KR KR1020197011456A patent/KR20190053251A/en unknown
- 2017-09-14 TW TW106131542A patent/TW201814340A/en unknown
- 2017-09-14 CN CN201780058027.8A patent/CN109716019A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112015007A (en) * | 2020-09-15 | 2020-12-01 | 武汉华星光电技术有限公司 | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201814340A (en) | 2018-04-16 |
| WO2018057380A1 (en) | 2018-03-29 |
| KR20190053251A (en) | 2019-05-17 |
| JP2019530162A (en) | 2019-10-17 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190503 |
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| WW01 | Invention patent application withdrawn after publication |