CN110249176A - Light guide sub-assembly comprising optical control character - Google Patents

Light guide sub-assembly comprising optical control character Download PDF

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Publication number
CN110249176A
CN110249176A CN201880009809.7A CN201880009809A CN110249176A CN 110249176 A CN110249176 A CN 110249176A CN 201880009809 A CN201880009809 A CN 201880009809A CN 110249176 A CN110249176 A CN 110249176A
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CN
China
Prior art keywords
assembly
light guide
layer
modified layer
light
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.)
Withdrawn
Application number
CN201880009809.7A
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Chinese (zh)
Inventor
李沈平
W·赛纳拉特纳
N·文卡特拉曼
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Corning Inc
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Corning Inc
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Publication of CN110249176A publication Critical patent/CN110249176A/en
Withdrawn legal-status Critical Current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
    • G02B6/0035—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
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Liquid Crystal (AREA)

Abstract

Light guide sub-assembly disclosed herein includes glass baseplate, prism layer and comprising inorganic or inorganic-organic mixing material at least one layer of modified layer.At least one light source optical can be coupled to the edge surface of glass baseplate, to provide optical package.Further disclose display equipment and light emitting device including such light guide and optical package.

Description

Light guide sub-assembly comprising optical control character
The cross reference of related application
The application is according to 35U.S.C. § 119, it is desirable that on February 01st, 2017 U.S. Provisional Application Ser the 62/th submitted 453, No. 075 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 light guide sub-assembly and comprising such sub-assembly, more specifically Ground is related to the glass light guide plate comprising at least one optical control character.
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.Compared to edge-lit BLU, back shines BLU may have advantage on improving dynamic contrast.For example, having the display for carrying on the back the BLU that shines that can be independently adjusted often The brightness of a LED, to optimize the dynamic brightness range on image.This is commonly referred to as local dimming.But it is required in order to realize Optical uniformity and/or in order to avoid carrying on the back the hot spot in the BLU that shines, light source is possibly disposed in distance LGP a certain distance, thus So that monitor overall thickness is greater than the case where edge-lit BLU.It shines in BLU in conventional edge, the light meeting from each LED Drawout comes on the big region LGP, so that dynamic contrast can only be had most by closing single led or LED group The influence of smallization.
The local dimming efficiency of LGP can be enhanced for example, by providing one or more micro-structures on the surface LGP.Example Such as, plastics LGP (for example, polymethyl methacrylate (PMMA) or styrene-methyl methacrylate (MS) LGP) can be manufactured At with surface micro-structure (for example, lenticule), in the light collimationization to narrowband from each LED or can will be limited in In narrowband.In this manner, it may be possible to which the brightness of light source can be adjusted, along the edge of LGP to enhance the dynamic contrast of display Degree.If LED is mounted in two opposite sides of LGP, adjustable LED pairs of brightness, to be provided along light band bright Gradient is spent, this can further improve dynamic contrast.
It is also likely to be advantageous for being modified to LGP with the uniformity for improving from the intensity of the LGP light extracted and/or color 's.For example, at least one surface of LGP can be modified to include light extraction features body, the total internal reflection in LGP is destroyed (TIR).In some cases, the density of light extraction features body can increase with the distance apart from light source.For being carried out to LGP It may include for example that surface, which is modified with the technology for forming micro-structure and/or light extraction features body: silk-screen printing, inkjet printing, heat Stamp and laser stamp.Laser stamp may have certain advantages in terms of patterned pattern control, for example, using software, The process time of reduction, repeatability, and manufacture flexibility.Hot stamping, which is carved, may also improve in the control of feature shape, can weigh There is advantage in terms of renaturation and large-scale processing ability.
Compared to plastics LGP, glass LGP can provide various improvement in the following areas, such as: their low optical attenuation, Low thermal expansion coefficient and high mechanical strength.It is thereby possible to it is desirable for alternative building material of the glass as LGP, To overcome various defects relevant to plastics.For example, can be difficult to make due to their weaker mechanical strengths and/or Low rigidity It makes while being sufficiently large and thin plastics LGP to meet current consumer demand.Due to high thermal expansion coefficient, plastics LGP Possibility must also there are biggish gaps between light source and LGP, this can reduce coupling efficiency and/or require biggish display Device inclined-plane.In addition, the tendency for changing colour and/or absorbing moisture and being swollen occurs at any time for plastics LGP compared to glass LGP Property may be higher.
Due to advantages described above, many display manufacturing commercialization glass LGP substituted for plastic LGP, such as producing Thinner display.But BLU still can include other polymers layer (such as brightness enhancement film (BEF) or light diffusion layer), They may have one of defect referred to above or a variety of.Therefore it provides including polymers compositions as few as possible BLU stacking can be advantageous, for example, by replaced with inorganic or inorganic-organic mixed layer in BLU at least one layer it is organic Layer.It provides and includes glass LGP and there is improved local dimming efficiency, improved optical uniformity and/or improved light extraction The BLU of at least one of efficiency can be also advantageous.
Summary of the invention
In various embodiments, this disclosure relates to and also reveal light guide sub-assembly, the light guide sub-assembly herein Including having the glass baseplate of shine the first main surface and opposite second main surface；It is mixed comprising organic and inorganic or inorganic-organic The prism layer of condensation material；And the first modified layer between the first main surface and prism layer of glass.First modified layer can To include inorganic or inorganic-organic mixing material, and refractive index nMLess than the refractive index n of glass baseplateG。
According to various embodiments, the refractive index n of the first modified layerMThe refractive index n of prism layer can be less thanP.Light guide combination Part can also include at least one layer of adhesive phase, such as between prism layer and the first modified layer.In some embodiments, it glues The refractive index n of mixture layerAThe refractive index n of prism layer can be less thanPAnd it is greater than the refractive index n of the first modified layerM.In other implementations In mode, light guide sub-assembly can not include adhesive phase, for example, inorganic or inorganic-organic mixing prism layer can direct cloth It sets in the first modified layer.
According to certain embodiments, light guide sub-assembly can also include the be arranged in the second main surface of glass baseplate Two modified layers, second modified layer include inorganic or inorganic-mixing material.The refractive index n of second modified layerM’Can be greater than or Equal to the refractive index n of glass baseplateG.Second modified layer and/or the second main surface of glass baseplate may include at least one light Character is extracted, for example, multiple light extraction features bodies.The thickness range of first or second modified layer can be for example, about 5 μm extremely About 100 μm.
There is also disclosed herein light guide sub-assemblies comprising has the glass of shine the first main surface and opposite second main surface Substrate, and the prism layer being arranged in the first main surface of glass baseplate.Prism layer may include inorganic or inorganic-organic Mixing material, and refractive index nPLess than the refractive index n of glass baseplateG.In some embodiments, light guide sub-assembly can be with Including the second modified layer being arranged in the second main surface of glass baseplate, second modified layer includes inorganic or inorganic-mixed Condensation material and refractive index nMMore than or equal to the refractive index n of glass baseplateG.According to non-limiting embodiment, the second modified layer It may include multiple light extraction features bodies and/or micro-structure.Exemplary microstructures may include prism, rounded prisms or lenticular The periodicity or aperiodic array of mirror.
There is also disclosed herein optical packages comprising is optically coupled to the side of any light guide sub-assembly disclosed herein The light source on edge surface.In some embodiments, light source can have the maximum emission angle θ for meeting following equationm:In other words, if using having maximum emission angle (θm) light source, then glass baseplate and first The refractive index of modified layer can satisfy following equation: n2 LGP-n2 LI≥sin(θm).There is also disclosed herein include such light guide and Display equipment, electronic device and the light emitting device of optical package.
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, in which:
Fig. 1-5B shows the representative configuration of the light guide sub-assembly according to the various embodiments of the disclosure；And
Fig. 6 A-D shows the exemplary microstructured surface according to disclosure certain embodiments.
Specific embodiment
There is disclosed light guide sub-assembly, the light guide sub-assembly includes having shine the first main surface and opposite second master The glass baseplate on surface；Include organic and inorganic or inorganic-organic mixing material prism layer；And positioned at the first of glass The first modified layer between main surface and prism layer.First modified layer may include inorganic or inorganic-organic mixing material, and And refractive index nMLess than the refractive index n of glass baseplateG.Light guide sub-assembly can also include adhesive phase and/or the second modified layer.
There is also disclosed herein light guide sub-assemblies comprising has the glass of shine the first main surface and opposite second main surface Substrate, and the prism layer being arranged in the first main surface of glass baseplate.Prism layer may include inorganic or inorganic-organic Mixing material, and refractive index nPLess than the refractive index n of glass baseplateG.Light guide sub-assembly can also include the second modified layer.This Text further discloses optical package comprising is optically coupled to the light of the edge surface of any light guide sub-assembly disclosed herein Source.There is also disclosed herein the devices comprising such light guide and optical package, for example, display equipment, light emitting device and electronics Device, such as: television set, computer, mobile phone, plate and other display pannels, luminaire, solid-state light emitting element, advertisement Board and other constracture units etc..
The various embodiments of the disclosure are discussed now with reference to Fig. 1-6, which show the exemplary implementations of light guide sub-assembly Mode and aspect.Following general description is intended to provide the overview for device claimed, and disclosure full text will The non-limiting embodiment referring to shown in more specifically discusses various aspects, in content of this disclosure, these embodiments It can be exchanged with each other.
Fig. 1 schematically shows illustrative light guide sub-assembly 100 comprising glass baseplate 110, prism layer 115 and first change Property layer 120.Glass baseplate 110 can have luminous first main surface 125, light incident edge surface 130 and with the first main table The second opposite main surface 135 of face 125.First modified layer 120 can be arranged in the first main light emission surface of glass baseplate 110 On 125 and prism layer 115 can be arranged in the first modified layer 120.First modified layer 120 can be arranged in glass baseplate Between 110 and prism layer 115.Prism layer 115 may include organic and inorganic or inorganic-organic mixing material.First modified layer 120 may include inorganic or inorganic-organic mixing material.It is discussed more in detail and changes suitable for prism layer 115 and first The material of property layer 120.
As used herein, term " on being arranged in ... " and its version are intended to indicate that component or layer are located at particular surface It is upper and with the surface direct physical contact.For example, the first modified layer 120 can be arranged in the first main table of glass baseplate 110 On face 125 and with the surface direct physical contact, such as therebetween without arranging any additional layer or film.Component B as a result, Surface on component A and component B direct physical contact.
In some embodiments, at least one light source 140 may be optically coupled to light incident edge surface 130, such as Position is adjacent with edge surface.As used herein, term " optical coupled " is intended to indicate that the edge that light source is placed on to LGP, thus It introduces light into LGP.Even if not having to be physically contacted with LGP, light source can also be optically coupled to LGP.It can also be by volume Outer light source (not shown) is optically coupled to other edge surfaces of LGP, for example, adjacent or opposite edge surface.
It can be in the second main surface 135 of glass baseplate 110 or in matrix (for example, in the second main surface 135 Under) multiple light extraction features bodies 145 are formed, it is as follows to be discussed more fully.Reflector 150 may be positioned so that and glass baseplate 110 The second main surface 135 it is adjacent so that light is recycled back into light guide sub-assembly 100.
Referring to fig. 2, light guide sub-assembly 100 may include glass baseplate 110 and be arranged in glass baseplate 110 shine the The first modified layer 120 in one main surface 125.Prism layer 115 can be arranged to adjacent with the first modified layer 120, such as make First modified layer 120 is placed between glass baseplate 110 and prism layer 115.Optionally, adhesive phase 155 can be placed in prism layer 115 and first between modified layer 120.For example, the first modified layer 120 can be placed in some non-limiting embodiments In one main surface 125, adhesive phase 155 can be placed in the first modified layer 120 and prism layer 115 can be placed in adhesive On layer 155.In some embodiments, prism layer 115 can be laminated to by the first modified layer 120 by adhesive phase 155.Rib Mirror layer 115 may include organic and inorganic or inorganic-organic mixing material.First modified layer 120 may include inorganic or nothing Machine-organic mixed material.
As used herein, it is listed to be intended to indicate that component or layer are located at for term " be positioned to ... adjacent " and its version It is in the particular surface of component out or adjacent with particular surface, but not necessarily with the surface direct physical contact.For example, In Fig. 1, prism layer 115 and 120 direct physical contact of the first modified layer are shown.But in some embodiments, such as schemed Embodiment shown in 2, may be between the two components there are other layers or film (for example, adhesive phase 155) or even Gap.In Fig. 1, prism layer 115 is arranged in the first modified layer 120.In Fig. 2, the arrangement of prism layer 115 is modified at first Layer 120 is adjacent.
Be positioned to as a result, with the component A of the surface of component B " adjacent " can with component B direct physical contact or do not have Direct physical contact.In some embodiments, being positioned to the component adjacent with surface can be with the surface direct physical contact. Similarly, be placed on component B and C " between " component A can be but not necessarily straight with these components between component B and C Connect physical contact.In some embodiments, be placed on the first assembly between the second component can in second component At least one direct physical contact.
It can be in the second main surface 135 of glass baseplate 110 or in matrix (for example, in the second main surface 135 Under) multiple light extraction features bodies 145 are formed, it is as follows to be discussed more fully.Similar to Fig. 1, light source 140 may be positioned so that and glass The light incident edge surface 130 of substrate 110 is adjacent and reflector 150 may be positioned so that the second main table with glass baseplate 110 Face 135 is adjacent.
Referring to Fig. 3, light guide sub-assembly 100 may include: glass baseplate 110, be arranged in the first main table of glass baseplate 110 The first modified layer 120 on face 125, the second modified layer 120 ' being arranged in the second main surface 135 of glass baseplate, Yi Jibu It sets the prism layer 115 (situation as shown) in the first modified layer 120 or is arranged to the rib adjacent with the first modified layer 120 Mirror layer 115 (unshowned situation).First modified layer 120 can be arranged between glass baseplate 110 and prism layer 115.Prism Layer 115 may include organic and inorganic or inorganic-organic mixing material.First and second modified layers 120,120 ' may include Inorganic or inorganic-organic mixing material.
Light source 140 may be positioned so that and reflector 150 adjacent with the light incident edge surface 130 of glass baseplate 110 can It is adjacent with the second modified layer 120 ' to be positioned to.It, can be in the second modified layer 120 ' or second according to additional embodiments Multiple light extraction features bodies 145 are formed in modified layer 120 ', it is as follows to be discussed more fully.
Referring to fig. 4, light guide sub-assembly 100 may include glass baseplate 110 and be arranged in glass baseplate 110 shine the Prism layer 115 in one main surface 125.Prism layer 115 may include inorganic or inorganic-organic mixing material, it is as follows more It is discussed in detail.It can be in the second main surface 135 of glass baseplate 110 or in matrix (for example, in the second main surface 135 Under) multiple light extraction features bodies 145 are formed, it is as follows to be discussed more fully.Light source 140 may be positioned so that and glass baseplate 110 Light incident edge surface 130 is adjacent and reflector 150 may be positioned so that 135 phase of the second main surface with glass baseplate 110 It is adjacent.
Fig. 5 A-B shows respectively from (for example, vertical) edge surface 160 adjacent with light incident surface 130 and enters from light The side view for the light guide assemblies 100 that reflective surface 130 is observed.Light guide sub-assembly 100 may include: glass baseplate 110, be arranged in glass Glass substrate 110 shine the first main surface 125 on prism layer 115 and be arranged in the second main surface 135 of glass baseplate The second modified layer 120 '.As shown in figures 5 a-b, the second modified layer 120 ' may include multiple micro-structures 165.
As used herein, term " micro-structure ", " micro-structural " and its version are intended to indicate that with assigned direction (example Such as, parallel or orthogonal to optical propagation direction) extend modified layer surface relief features, and have at least one dimension (for example, height, width etc.), be less than about 500 μm, for example, less than about 400 μm, less than about 300 μm, less than about 200 μm, be less than About 100 μm, be less than about 50 μm or even more small, for example, range is about 10 μm to about 500 μm, including all ranges therebetween And subrange.In some embodiments, micro-structure can have rule or irregular shape, can be in given array It is the same or different.
Although the second modified layer 120 ' of construction display includes micro-structure 165 shown in Fig. 5 A-B, it is to be appreciated that, In some embodiments, the second modified layer 120 ' can not include micro-structure 165.Similarly, although embodiment shown in Fig. 3 It is not described as the second modified layer 120 ' for having micro-structural, it is to be appreciated that, in a non-limiting embodiment, the Two modified layers 120 ' may include micro-structure.
Prism layer 115 and the second modified layer 120 ' may include inorganic or inorganic-organic mixing material, as follows more detailed It is thin to discuss.Multiple light extraction features bodies 145 can be formed in the second modified layer 120 ' or in the second modified layer 120 '.? In some embodiments, light extraction features body 145 can be arranged on the top of micro-structure 165, as shown in Figure 5 B.Light source 140 It may be positioned so that and reflector 150 adjacent with the light incident edge surface 130 of glass baseplate 110 also may be positioned so that and the Two modified layers 120 ' are adjacent, so that light is recycled back into light guide sub-assembly 100.
Light from light source 140 can rapidly drawout comes in light guide sub-assembly 100, this makes effective local dimming (for example, by closing one or more light sources) is difficult.But by providing with optical propagation direction (such as solid line of Fig. 5 A Shown in arrow) elongation one or more micro-structures, may can limit sprawling for light, so that each light source only effectively illuminates The narrowband of LGP.The band being illuminated can be extended to for example in opposite edges 170 from the starting point on light incident edge surface 130 Similar endpoint.Various micro-structured configurations are used as a result, it may can be in a manner of more efficient, so that light collimationization and in fact The 1D local dimming of existing at least part of light guide sub-assembly 100.
In some embodiments, light guide sub-assembly, which may be configured so that, may be implemented 2D local dimming.For example, one Or multiple additional light sources may be optically coupled to one in adjacent (for example, vertical) edge surface, such as edge surface 160 Or two.One layer of modified layer may include the micro-structure extended with optical propagation direction, and (unshowned) another layer of modified layer It may include the micro-structure to extend perpendicular to the direction of optical propagation direction.Thus, by selectively closing off along each side One or more of the light source on edge surface, may be implemented 2D local dimming.
Although Fig. 5 B shows generally the micro-structure 165 of identical size and shape, they are uniform with essentially identical pitch Ground is spaced apart, it is to be appreciated that, all micro-structures in not given array must be all of the same size and/or shape Shape and/or spacing.The combination and such combination that microstructure aspects and/or size can be used can be arranged into periodically or Person's aperiodicity style.In addition, although Fig. 5 B shows the micro-structure 165 with biconvex lens (lenticular) profile, Second modified layer 120 ' may include having other differently contoured any suitable micro-structures 165.For example, Fig. 6 A-B is shown respectively Show the micro-structure including prism 165A and rounded prisms 165B.As shown in Figure 6 C, micro-structure also may include biconvex lens 165C. Certainly, micro-structure shown in is only exemplary, it is no intended to be limited appended claims.Other microstructure aspects It is also possible, and be intended to fall in the scope of the present disclosure.In addition, Fig. 6 A-C display although rule (or periodically) array, But irregular (or aperiodicity) array also can be used.For example, Fig. 6 D is micro- knot of the aperiodic array comprising prism The SEM image on structure surface.
Depending on the light output and/or optical functional of required light guide sub-assembly 100, the size of micro-structure 165 and/or Shape can also change.For example, different microstructure aspects can lead to different local dimming efficiency, also referred to as office Portion dims index (LDI).It can be using such as Jung et al. in " Local dimming design and optimization For edge-type LED backlight unit (local dimming of edge type ELD back light unit designs and optimization) " SID Symp.Dig.Tech.Papers, 42 (1), method described in the 1430-1432 pages (in June, 2011) determine that local dimming refers to Number.As non-limitative example, the cyclic array of prism microstructure can lead to be up to about 70% LDI value, and biconvex The cyclic array of lens can cause to be up to about 83% LDI value.Of course, it is possible to change microstructure size and/or shape And/or spacing is to realize different LDI values.Different microstructure aspects can also provide additional optical functional.For example, having The prism array of 90 ° of prism angles can not only lead to local dimming more evenly, but also due to the recycling of light and again fixed To light can also partly be focused on to the direction perpendicular to apex of prism.
Referring to Fig. 6 A, the prism angle θ's of prism microstructure 165A can range from about 60 ° to about 120 °, for example, about 70 ° to about 110 °, about 80 ° to about 100 ° or about 90 °, including therebetween all ranges and subrange.Referring to Fig. 6 C, biconvex is micro- Structure 165C can have any given cross-sectional shape (shown in dotted line), and range is: semicircle, half elliptic, parabola Shape or other similar rounded shapes.It should be noted that purpose is shown for simplifying, without display light extraction in Fig. 6 A-C Character, but can have such character in a non-limiting embodiment.
(having micro-structure) second modified layer 120 ' can have integral thickness d2" land " thickness t.Micro-structure can To include height that peak p and paddy v and integral thickness can correspond to peak p, and land thickness can correspond to the height of paddy v. According to various embodiments, land thickness t is provided equal to 0 or may be advantageous as close possible to 0 the second modified layer 120 ' 's.When t is 0, the second modified layer 120 ' can be discontinuous.For example, the range of land thickness t can be 0 to about 50 μm, For example, about 1 μm to about 40 μm, about 2 μm to about 30 μm, about 5 μm to about 20 μm or about 10 μm to about 15 μm, including institute therebetween There are range and subrange.In other embodiments, the integral thickness d of the second modified layer 120 '2Can range from about 10 μm To about 100 μm, such as: about 20 μm to about 90 μm, about 30 μm to about 80 μm, about 40 μm to about 70 μm or about 50 μm to about 60 μ M, including all ranges and subrange therebetween.
With continued reference to Fig. 6 A-C, micro-structure can also have width w, can change on demand to realize required indulge Horizontal ratio.It can be using change land thickness t and integral thickness d2To change light output.In a non-limiting embodiment, micro- knot Aspect ratio (w/ [the d of structure 1652- t]) range may is that about 0.2 to about 8, such as: about 0.5 to about 7, about 1 to about 6, about 1.5 To about 5, about 2 to about 4 or about 2.5 to about 3, including therebetween all ranges and subrange.According to some embodiments, in length and breadth Ratio can range from about 2 to about 3, for example, about: 2,2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9 or 3, including All ranges and subrange therebetween.The range of the width w of micro-structure 165 is also possible to for example, about 1 μm to about 500 μm, such as: About 10 μm to about 400 μm, about 20 μm to about 300 μm, about 30 μm to about 250 μm, about 40 μm to about 200 μm or about 50 μm to about 100 μm, including therebetween all ranges and subrange.It may also be noted that micro-structure 165 can have with optical propagation direction Or the length L of the direction extension perpendicular to optical propagation direction (see, for example, the dotted line in Fig. 6 A-C).The length of micro-structure 165 L can change on demand, such as depending on the size of glass baseplate 110.According to various embodiments, micro-structure can be along them Length L or width w there are one or more saltuss of discontinuity.
As shown in Figs. 1-5, the substantially direction of the launch of the light from light source 140 is indicated with solid arrow.Due to total internal reflection (TIR), the light being injected into LGP can be propagated along the length of LGP, until it is struck with the incidence angle for being less than critical angle Interface.Total internal reflection (TIR) is such phenomenon: in the first material (for example, glass, plastics etc.) comprising first refractive index The light of propagation can be in the interface of the second material (for example, air etc.) with the second refractive index comprising being less than first refractive index All reflected.TIR can be explained using Snell law:
n1sin(θi)=n2sin(θr)
This describes the anaclasis of the interface between two kinds of materials of different refractivity.According to Snell law, n1 It is the refractive index of the first material, n2It is the refractive index of the second material, θiBe interface incidence light relative to interface in normal direction Angle (incidence angle) and θrIt is refraction angle of the light through superrefraction relative to normal direction.As refraction angle (θr) when being 90 °, for example, sin(θr)=1, then Snell law can indicate are as follows:
Incidence angle θ under these conditionsiIt can also be referred to as critical angle θc.Incidence angle is greater than the light (θ of critical anglei>θc) Meeting experiences total internal reflection in the first material, and incidence angle is equal to or less than the light (θ of critical anglei≤θc) can be saturating by the first material It penetrates.
In air (n1=1) with glass (n2=1.5) it in the case where the exemplary interfaces between, can be calculated critical Angle (θc) it is 42 °.Therefore, if the light propagated in glass hits air-glass surface, institute with the incidence angle greater than 42 ° Some incident lights can all be reflected with the angle for being equal to incidence angle from interface.If the second contact surface that the light by reflection is met with includes Index of refraction relationship as the first interface, the then light being incident on second contact surface can be sent out again with the angle of reflection for being equal to incidence angle Raw reflection.
As used herein, " refractive index " is referred in the material measured at human eye response peak value (for example, about 550nm) Refractive index.The refractive index of the various assemblies of light guide sub-assembly 100 can be selected, thus increase with perpendicular to or base This is transmitted perpendicular to the direction (for example, towards observer) of the light-emitting area 125 of glass baseplate 110 by light guide sub-assembly 100 Light quantity.For example, first modified layer 120 can have refractive index n in the non-limiting embodiment shown in Fig. 1-3M, small In the refractive index n of glass baseplate 110GWith the refractive index n of prism layer 115P.In some embodiments, the refraction of prism layer 115 Rate nPThe refractive index n of glass baseplate can be greater than or equal toG.(Fig. 2) if present, in some embodiments, adhesive Layer 155 can have refractive index nA, it is greater than the refractive index n of the first modified layer 120M, but it is less than the refraction of prism layer 115 Rate nP.(Fig. 3) if present, the second modified layer 120 ' can have refractive index nM’, it is greater than or equal to glass baseplate 110 Refractive index nG.In the non-limiting embodiment shown in Fig. 4-5, the refractive index n of prism layer 115PGlass baseplate can be less than Refractive index nG.(Fig. 5 A-B) if present, the second modified layer 120 ' can have refractive index nM’, it is greater than or equal to glass The refractive index n of glass substrate 110G。
According to various embodiments, the refractive index n of glass baseplate 110GIt 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 institute therebetween There are range and subrange.In some embodiments, the first modified layer 120 can have the refractive index less than glass baseplate 110, Such as nGN can be comparedMIt is big by least about 1%, such as compare nMBig at least about 2%, at least about 3%, at least about 5%, at least about 10%, at least about 15%, at least about 20% or at least about 25%, including therebetween all ranges and subrange, such as compare nM It is big by about 1% to about 25%.In a non-limiting embodiment, nMCan range from about 1 to about 1.78, such as: about 1.1 to About 1.75, about 1.2 to about 1.7, about 1.3 to about 1.6 or about 1.4 to about 1.5, including all ranges and subrange therebetween.
According in other embodiments, (with or without micro-structure) second modified layer 120 ' be can have greater than glass The refractive index of glass substrate 110, such as nM’N can be comparedGIt is big by least about 1%, such as compare nGBig at least about 2%, at least about 3%, at least about 5%, at least about 10%, at least about 15%, at least about 20% or at least about 25%, including all models therebetween It encloses and subrange, such as compares nGIt is big by about 1% to about 25%.In a non-limiting embodiment, nM’Can range from about 1.32 to about 2.1, such as: about 1.35 to about 2, about 1.4 to about 1.9, about 1.5 to about 1.8 or about 1.6 to about 1.7, including its Between all ranges and subrange.According to other embodiments, the refractive index of the second modified layer 120 ' can be equal to or substantially etc. In the refractive index of glass baseplate 110, for example, nM’It can be nGAbout 1% in, such as nGAbout 0.5% in, in about 0.2% or In person about 0.1%, including therebetween all ranges and subrange.
According to certain embodiments, for example, if prism layer 115 is arranged in the first main surface 125 of glass baseplate 110 On, then the refractive index of prism layer 115 can be less than the refractive index of glass baseplate 100, for example, nGN can be comparedPIt is big at least about 1%, such as compare nPBig at least about 2%, at least about 3%, at least about 5%, at least about 10%, at least about 15%, at least about 20% or at least about 25%, including therebetween all ranges and subrange, such as compare nPIt is big by about 1% to about 25%.One In a little embodiments, for example, if the first modified layer 120 is arranged between prism layer 115 and glass baseplate 110, prism layer 115 refractive index can be greater than the refractive index of glass baseplate 110 and/or the first modified layer 120, for example, nPN can be comparedGAnd/or nMIt is big by least about 1%, such as compare nGAnd/or nMBig at least about 2%, at least about 3%, at least about 5%, at least about 10%, extremely Few about 15%, at least about 20% or at least about 25%, including therebetween all ranges and subrange, such as compare nGAnd/or nMGreatly About 1% to about 25%.According to other embodiments, the refractive index of prism layer 115 can be equal to or substantially equal to glass base The refractive index of material 110 and/or the first modified layer 120 and/or the second modified layer 120 ', for example, nPIt can be nGAnd/or nMAnd/or nM’About 1% in, such as nGAnd/or nMAnd/or nM’About 0.5% in, in about 0.2% or in about 0.1%, including therebetween All ranges and subrange.
In some embodiments, light source 140 can be Lambertian source, such as light emitting diode (LED).In certain implementations In mode, blue light, UV light or nearly UV light (for example, about 100-500nm) can occur for light source 140.According to various embodiments, It can be to the maximum emission angle (θ of light source (for example, LED)m) and the refractive index of glass baseplate and the first modified layer selected, To maximize the coupling efficiency for the light for entering light guide sub-assembly from light source.For example, changing for given glass baseplate and first The refractive index n of property layerGAnd nM, light source can be selected, so that its maximum emission angle θmMeet following equation (1):
Similarly, for giving maximum emission angle θm, glass baseplate and the first modified layer refractive index can be selected, So that meeting following equation (2):
As used herein, term " maximum emission angle " is intended to indicate that the normal direction relative to emission source surface, it is photoemissive most Wide-angle, for example, maximum emission angle can be about 80 degree if the angular distribution of planar LED output is lambert.
Referring again to Fig. 1-5, the first modified layer 120, the second modified layer 120 ' or glass baseplate 110 may include being formed Multiple light extraction features bodies 145 on the surface or under surface.For example, the first modified layer 120, the second modified layer 120 ' or Second main surface 135 of glass baseplate 110 can pattern multiple light extraction features bodies 145.Light extraction features body 145 can be with On the surface as veining feature, constituting roughened surface perhaps raised surface or can be distributed in entire base for distribution In material, entire first modified layer 120, entire second modified layer 120 ' or in their part, for example, as laser damage feature Body.Light extraction features body 145 can have arbitrary cross section profile, and may include at least one dimension (for example, height, Width etc.), the dimension be less than about 100 microns (μm), for example, less than about 75 μm, be less than about 50 μm, be less than about 25 μm, be less than about 10 μm or it is even more small, including therebetween all ranges and subrange, such as range is about 1 μm to about 100 μm.
In various embodiments, light extraction features body 145 may include light scattering point.According to various embodiments, Suitable density can be patterned to by extracting character 145, to generate on the light-emitting area 125 of glass baseplate 110 basic Uniform light output intensity.In some embodiments, the density by the light extraction features body 145 of close to sources 140 can be lower than In the density (or vice versa) of the light extraction features body 145 of the point more far from light source 140, for example, from one end to another End in gradient, is distributed to suitably generate required light output on light guide sub-assembly 100.
Generate such light extraction features body 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.It can be using for example Disclosed in co-pending and jointly owned international patent application no PCT/US2013/063622 and PCT/US2014/070771 Method form light extraction features body 145, full text is incorporated into this article by reference respectively.The non-limiting example of appropriate method Son can also include for example: carrying out acid etching to surface, use TiO2Coating surface, it is on surface or poly- by focusing on laser Coke carries out laser damage to substrate or layer to Medium Culture.
Exemplary laser includes but is not limited to: Nd:YAG laser and CO2Laser etc..Depending on required light extraction features body Distribution, thus it is possible to vary the operating parameter of laser, such as laser power, pulse duration, pulse energy and its dependent variable.? In some embodiments, the pulse duration can be about 1 to about 1000 microsecond (μ s), for example, about 5 to about 500 μ s, about 10 μ s To about 200 μ s, about 20 μ s to about 100 μ s or about 30 μ s to about 50 μ s, including therebetween all ranges and subrange.Laser function Rate range is also possible to about 1 to about 100 watt (W), and for example, about 5 to about 50W or about 10 to about 35W, it is all including therebetween Range and subrange.Range of laser energy can be for example, about 0.01 to about 100 millijoule (mJ), for example, about 0.1 to about 10mJ, About 0.5 to about 5mJ or about 1mJ to about 2mJ, including therebetween all ranges and subrange.
Glass baseplate 110 can have any required size and/or shape, suitably to generate required light distribution. In some embodiments, the main surface 125,135 of glass baseplate 110 can be flat or substantially flat and/or parallel 's.In various embodiments, the first and second main surfaces can also have the radius of curvature along at least one axis.Glass base Material 110 may include 4 edges, or may include more than 4 edges, for example, more side polygons.In other embodiments In, glass baseplate 110 may include less than 4 edges, such as triangle.As non-limitative example, glass baseplate 110 can be with Including rectangle, square or trhomboid sheet material with 4 edges, but other shapes and construction are also intended to and fall into this public affairs In the range of opening, including there are one or more those of curved portions or edge.
In some embodiments, the thickness of glass baseplate 110 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.Glass baseplate 110 may include any materials known in the art for display equipment, comprising: manosil AS Salt glass, alkali alumino-silicates glass, borosilicate glass, alkaline borosilicate glass, aluminium borosilicate glass, alkaline aluminium boron Silicate glass, soda-lime glass or other suitable glass.It is suitable as the unrestricted of the commercially available glass of glass light guides Property example including such as Corning Corp. (Corning Incorporated) EAGLELotusTM、IrisTMWithGlass.
Some non-limiting glass compositions may include: about 50 moles of % to about 90 moles of %SiO2, 0 mole of % be to about 20 moles of %Al2O3, 0 mole of % to about 20 moles of %B2O3, 0 mole of % to about 20 moles of %P2O5And 0 mole of % to about 25 Mole %RxO, wherein R is any one or more in Li, Na, K, Rb, Cs and x be 2 or R is Zn, Mg, Ca, Sr Or any one or more and the x in Ba are 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.? In some embodiments, glass includes each of Co, Ni and Cr less than 1ppm.In some embodiments, Fe's is dense Degree < about 50ppm, < about 20ppm or < 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: about 60 moles of % to about 80 moles of %SiO2, about 0.1 mole of % to about 15 moles of %Al2O3, 0 mole of % to about 12 Mole %B2O3, and about 0.1 mole of % to about 15 moles of %R2O and about 0.1 mole of % to about 15 moles of %RO, wherein R is Any one or more and x in Li, Na, K, Rb, Cs be 2 or R be in Zn, Mg, Ca, Sr or Ba any one or A variety of 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 baseplate 110 may include glass, and the glass includes RxO/Al2O3The ratio between be 0.95 to 3.23, wherein R is any one or more in Li, Na, K, Rb, Cs and x is 2.In other embodiments, Glass may include: RxO/Al2O3The ratio between be 1.18 to 5.68, wherein R is any one or more in Li, Na, K, Rb, Cs And x is 2；Or it is 1 that R, which is any one or more and x in Zn, Mg, Ca, Sr or Ba,.In other embodiments, glass Glass may include RxO-Al2O3- MgO is -4.25 to 4.0, wherein R be in Li, Na, K, Rb, Cs any one or more simultaneously And x is 2.In other embodiments, glass may include: about 66 moles of % to about 78 moles of %SiO2, about 4 moles of % are to about 11 moles of %Al2O3, about 4 moles of % to about 11 moles of %B2O3, about 0 mole of % to about 2 moles of %Li2O, about 4 moles of % are to about 12 moles of %Na2O, about 0 mole of % to about 2 moles of %K2O, about 0 mole of % to about 2 moles of %ZnO, about 0 mole of % to about 5 rub You are %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 baseplate 110 may include glass material, and the glass material includes: about 72 rub You are % to about 80 moles of %SiO2, about 3 moles of % to about 7 moles of %Al2O3, about 0 mole of % to about 2 moles of %B2O3, about 0 rubs You are % to about 2 moles of %Li2O, about 6 moles of % to about 15 moles of %Na2O, about 0 mole of % to about 2 moles of %K2O, about 0 rubs You are % 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 % to about 2 moles of %BaO, and about 0 mole of % to about 2 moles of %SnO2.In certain implementations In mode, glass be 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 % to about 15 moles of %B2O3, and about 2 moles of % to about 50 moles of %RxO, wherein R is appointing in Li, Na, K, Rb, Cs It is any one or more and x in Zn, Mg, Ca, Sr or Ba is 1 that the one or more and x that anticipates, which is 2 or R, and wherein, Fe + 30Cr+35Ni < about 60ppm.
In some embodiments, glass baseplate 110 may include the gamut Δ y less than 0.05, for example, about -0.005 to About 0.05 or about 0.005 to about 0.015 (for example, about -0.005, -0.004, -0.003, -0.002, -0.001,0,0.001, 0.002、0.003、0.004、0.005、0.006、0.007、0.008、0.009、0.010、0.011、0.012、0.013、 0.014,0.015,0.02,0.03,0.04 or 0.05).In other embodiments, glass baseplate may include being less than 0.008 gamut.According to certain embodiments, for the wave-length coverage of about 420-750nm, glass baseplate, which can have, to be less than about The optical attenuation α of 4dB/m1(for example, due to absorb and/or scattering loss cause), for example, be less than about 3dB/m, be less than about 2dB/m, Less than about 1dB/m, it is less than about 0.5dB/m, is less than about 0.2dB/m or even more small, for example, about 0.2dB/m is to about 4dB/m's Range.
Decaying can characterize in the following way: light transmission T of the measurement input source across the transparent substrate of length LL(λ), And by this transmission for source spectrum T0(λ) is standardized.As unit of dB/m, obtaining decaying is α (λ)=- 10/L*log10 (TL(λ)/TL(λ)), in formula, L is length (unit is rice) and TL(λ) and TL(λ) is measured with radiation unit.
In some embodiments, glass baseplate 110 may include the glass that chemical strengthening is for example carried out by ion exchange Glass.Ion during ion exchange process, at the ion and glass sheet surface in sheet glass or at glass sheet surface It can be by the larger metal ion exchanged for example from salt bath.Larger ions binding is into glass, by producing in near-surface region Raw compression stress strengthens sheet glass.Corresponding tensile stress can be induced in the central area of sheet glass, with balance pressure Stress under compression.
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.The temperature of molten salt bath and processing duration can be with It changes.Those skilled in the art has the ability to determine time and temperature according to required application.As non-limitative example, melt The temperature of salt bath can be about 400 DEG C to about 800 DEG C (for example, about 400 DEG C to about 500 DEG C), and scheduled duration It can be about 4 hours to about 24 hours (for example, about 4 hours to 10 hours), but also consider the combination of 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 be assigned The K enriched layer of surface compression stress is given.
First modified layer 120 or the second modified layer 120 ' may include refractive index nMOr nM’That applies needed for being suitble to is any Inorganic or inorganic-organic mixing material.Exemplary inorganic material may include such as inorganic oxide, such as: silica, oxidation Aluminium, titanium oxide, zirconium oxide, rare-earth oxide；Other inorganic material, such as: alkaline silicate；And combinations thereof.As herein Used, " inorganic-organic mixing " material is intended to be included in nanometer or molecular level rather than at macroscopical (for example, micron or millimeter) Level includes inorganic and organic component compound.Exemplary inorganic-organic mixed material may include for example: organic silicic acid Salt/ester, for example, it is commercially available from Ge Lesite company (Gelest), mixed plastic company (Hybrid Plastics) or suddenly The silsesquioxane of Ni Weier company (Honeywell) and poly- octahedra silsesquioxane (polyoctachedral Silsesquioxane), and combinations thereof.In some embodiments, such inorganic-mixing material can be UV curable, It is heat-setting or photo curable.For example, in a non-limiting embodiment, inorganic-organic mixing material can be can Organosilicate/ester of photocuring.
In some embodiments, the total thickness of the first modified layer 120 or the second modified layer 120 ' can be about 5 μm to about 100 μm, such as: about 5 μm to about 90 μm, about 10 μm to about 80 μm, about 20 μm to about 70 μm, about 30 μm to about 60 μm or About 40 μm to about 50 μm of person, including all ranges and subrange therebetween.In some embodiments, splash or gas can be used Phase deposition technique (for example, chemical vapor deposition (CVD) or plasma fortified CVD (PECVD)) and other technologies (including Dip-coating, spin coating, roller coating and silk-screen printing etc.) carry out inorganic or inorganic-organic mixing first or second modified layer 120,120 ' Deposition.According to some embodiments, inorganic-organic mixing material can be used as liquid, sol-gel or low-viscosity layer and apply Apply, and can solidify subsequently through UV, heat cure, photocuring or any combination thereof mode solidified.It can use and appoint Anticipate suitable technology (for example, patterning, coining, molding, etching, it is microreplicated or at least one surface carry out it is any other The forming of mode provides micro-structure 165), micro-structure 165 is provided for the second modified layer 120 '.In various embodiments, may be used With before forming micro-structure for example, by coining, microreplicated or molding or during is formed, so that inorganic-organic mixing Material solidification.
If it exists, adhesive phase 155 may include any adhesive known in the art, for example, optical clear Adhesive (OCA) those of (for example, 3M company sale) and ionomer polymer (for example, the sale of (DuPont) company, Du Pont Those of).The exemplary thickness of adhesive phase may include following thickness range, for example, about 5 μm to about 500 μm, about 10 μm extremely About 400 μm, about 25 μm to about 300 μm, about 50 μm to about 250 μm or about 100 μm to about 200 μm, including all ranges therebetween And subrange.
Prism layer 115 may include any film or material known in the art for enabling to the light emitted from LGP to brighten, For example, changing the angular distribution of light to which the light-emitting area of itself and glass baseplate 110 is in normal direction or is substantially in normal direction (~90 ℃).Exemplary polymer prism film includes brightness enhancement film (BEF) and double brightness enhancement films (DBEF) etc..Commercially available polymer rib The non-limitative example of mirror film is the Vikuiti of 3M company saleTM.In some embodiments, prism layer 115 may include having Machine, inorganic or inorganic-organic mixing material, as herein disclosed as.Such material can pattern, imprint, moulding, Etching, the forming of microreplicated or any other modes, to provide the prism that can carry out blast to the light emitted from glass baseplate Structure.
In some embodiments, the various components of light guide sub-assembly 100, such as glass baseplate 110, the first modified layer 120, the second modified layer 120 ' and/or adhesive phase 155 (if present) can be transparent or substantially transparent.Such as this Used in text, term " transparent " is intended to indicate that in the visible light region (~420-750nm) of spectrum, for 500mm or smaller Length is transmitted, the transmissivity of component is greater than about 70%.For example, exemplary transparent material can have in visible light region and be greater than About 75% transmissivity is greater than the transmissivity of about 80% or greater than about 85%, including therebetween all ranges and sub- model It encloses.In some embodiments, exemplary modified layer 120,120 ' can be in 500mm or smaller transmission length in visible light Region has greater than about 40% transmissivity, is greater than about 50%, greater than about 60%, greater than about 70% or greater than about 80% Transmissivity, including therebetween all ranges and subrange.
In some embodiments, exemplary transparent material may include less than each in Co, Ni and Cr of 1ppm It is a.In some embodiments, the concentration of Fe < about 50ppm, < about 20ppm or < 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.According to other embodiments, exemplary transparent material may include gamut Δ y < 0.015, or in some implementations In mode, including gamut < 0.008.
Gamut can characterize in the following way: shine along with reference white LED (for example, Nichia NFSW157D-E) The length L of the LGP penetrated measures the x's and y of the chromaticity coordinate of the light of extraction using 1931 standard of CIE for color measuring Variation.The nominal color point of LED is selected as y=0.28 and x=0.29.For glass LGP, 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.Exemplary glass LGP has Δ y < 0.05, Δ y < 0.01, Δ y < 0.005, Δ y < 0.003 or Δ y < 0.001. If LGP does not have light extraction features body, can be by each measurement point L1And L2Add the light extraction features body of small area To be characterized to it.
Light guide sub-assembly disclosed herein may include line direction (for example, towards direction of observer) before being designed to Guide at least one optical control character of light.For example, optical control character can increase perpendicular to or substantially hang down The amount of the light directly transmitted in the light guide sub-assembly 100 on the direction of the light-emitting area 125 of glass baseplate 110.It can similarly grasp Control the relative index of refraction n of prism layerP, modified layer relative index of refraction nMAnd/or nM’And the relative index of refraction n of glass baseplateG, Normal direction or basic normal orientation with the light for promoting light guide sub-assembly to transmit.Come using inorganic or inorganic-organic material One or more organic layers (such as polymeric layer) in BLU stacking are substituted, the layer for the refractive index for generating variation can be provided Possibility, the bigger light manipulation degree in BLU stacking may be implemented in this.
Light guide sub-assembly disclosed herein can be used for various display equipments, including but not limited to LCD.It is exemplary The optical module of LCD can also include one or more diffusers, reflectance coating, prism film and/or polarizing coating, thin film transistor (TFT) (TFT) array, liquid crystal layer and/or one or more colour filters and other assemblies.Light guide sub-assembly disclosed herein may be used also For various lighting devices (such as light source or solid luminous device).
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 ".Therefore, " multiple light extraction features bodies " includes two or more such character, such as three Or more such character etc., and " micro structure array " includes two or more such micro-structures, such as three or more Multiple such micro-structures etc..
Herein, range can be expressed as from " about " occurrence and/or to the range of " about " another occurrence.When When stating this range, example includes stopping from a certain occurrence beginning and/or to another occurrence.Similarly, when use antecedent When " about " indicating that numerical value is approximation, it should be appreciated that specific value is constituted on the other hand.It will further be understood that each range Endpoint value 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, " basic It is similar " numerical value can be indicated mutually within about 10%, such as mutually within about 5%, or mutually within about 2%.
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 sub-assembly by A+B to the implicit alternative embodiment of the sub-assembly comprising A+B+C The embodiment that the embodiment and sub-assembly of+C composition are mainly made of A+B+C.
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.

Claims (21)

1. a kind of light guide sub-assembly comprising:
(a) glass baseplate comprising first main surface that shines and the second opposite main surface；
(b) prism layer comprising organic material, inorganic material or inorganic-organic mixing material；And
(c) the first modified layer being placed between the first main surface of glass baseplate and prism layer, first modified layer include:
Inorganic material or inorganic-organic mixing material, and
Refractive index nM, it is less than the refractive index n of glass baseplateG。
2. light guide sub-assembly as described in claim 1, wherein the refractive index n of first modified layerMLess than the folding of prism layer Penetrate rate nP。
3. light guide sub-assembly as described in claim 1 further includes the adhesive being placed between prism layer and the first modified layer Layer.
4. light guide sub-assembly as claimed in claim 3, wherein the refractive index n of described adhesive layerALess than the prism layer Refractive index nPAnd it is greater than the refractive index n of first modified layerM。
5. light guide sub-assembly as described in claim 1, wherein the prism layer includes that inorganic material or inorganic-organic are mixed Condensation material, and wherein, the prism layer is arranged in first modified layer.
6. light guide sub-assembly as described in claim 1, further include be arranged in the second main surface of glass baseplate or under At least one light extraction features body of side.
7. light guide sub-assembly as described in claim 1 further includes second be arranged in the second main surface of glass baseplate Modified layer, second modified layer include inorganic material or inorganic-mixing material.
8. light guide sub-assembly as claimed in claim 7, wherein the refractive index n of second modified layerM’More than or equal to glass The refractive index n of substrateG。
9. light guide sub-assembly as claimed in claim 7, wherein second modified layer includes at least one light extraction features Body.
10. light guide sub-assembly as claimed in claim 7, wherein second modified layer includes multiple micro-structures.
11. light guide sub-assembly as claimed in claim 10, wherein the multiple micro-structure includes prism, rounded prisms or double The periodicity or aperiodic array of convex lens.
12. light guide sub-assembly as described in any one of the preceding claims, wherein first modified layer described second changes The thickness range of property layer is about 10 μm to about 100 μm.
13. a kind of optical package comprising be optically coupled to light guide sub-assembly described in any one of preceding claims The light source of edge surface.
14. optical package as claimed in claim 13, wherein the maximum emission angle θ of light sourcemMeet following equation (1):
15. a kind of light guide sub-assembly comprising:
(a) glass baseplate comprising first main surface that shines and the second opposite main surface；With
(b) prism layer being arranged in the first main surface of glass baseplate, wherein the prism layer includes:
Inorganic material or inorganic-organic mixing material, and
Refractive index nP, it is less than the refractive index n of glass baseplateG。
16. light guide sub-assembly as claimed in claim 15 further includes be arranged in the second main surface of glass baseplate Two modified layers, wherein second modified layer includes inorganic or inorganic-mixing material and refractive index nM’More than or equal to glass The refractive index n of substrateG。
17. light guide sub-assembly as claimed in claim 16, wherein second modified layer further includes at least one light extraction spy Levy body.
18. light guide sub-assembly as claimed in claim 16, wherein second modified layer further includes multiple micro-structures.
19. light guide sub-assembly as claimed in claim 18, wherein the multiple micro-structure includes prism, rounded prisms or double The periodicity or aperiodic array of convex lens.
20. a kind of optical package comprising be optically coupled to light guide sub-assembly described in any one of claim 15-19 The light source of edge surface.
21. a kind of display equipment, light emitting device or electronic device comprising light as described in any one of the preceding claims Lead sub-assembly or optical package.
CN201880009809.7A 2017-02-01 2018-02-01 Light guide sub-assembly comprising optical control character Withdrawn CN110249176A (en)

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PCT/US2018/016430 WO2018144720A1 (en) 2017-02-01 2018-02-01 Light guide assemblies comprising optical manipulation features

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Application publication date: 20190917