CN103283218A - Video screen cover glass illumination - Google Patents
Video screen cover glass illumination Download PDFInfo
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- CN103283218A CN103283218A CN2011800619590A CN201180061959A CN103283218A CN 103283218 A CN103283218 A CN 103283218A CN 2011800619590 A CN2011800619590 A CN 2011800619590A CN 201180061959 A CN201180061959 A CN 201180061959A CN 103283218 A CN103283218 A CN 103283218A
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- light
- cover glass
- glass plate
- display screen
- video display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/65—Holding-devices for protective discs or for picture masks
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133616—Front illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133618—Illuminating devices for ambient light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Planar Illumination Modules (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Video display screens for ''video off'' illumination comprise an imaging display panel, a cover glass sheet for the display panel, and a light source for injecting light into the cover glass sheet, wherein at least a portion of the cover glass sheet is provided with at least one light-scattering bulk or surface element effective to scatter a portion of the light at an angle normal to plane of the cover glass sheet, for front surface illumination, or to scatter a portion of the light into the plane of the sheet, for sheet border or edge illumination.
Description
Cross-reference to related applications
The application requires the U.S. Provisional Application S/N61/407 that submitted on October 28th, 2010 based on 35U.S.C. § 119,698 rights and interests, and the content of this application is incorporated herein by reference.
Background
Technical field
The disclosure belongs to field of information display, and relates generally to the video display screen that illumination can be provided when activity is not used.
Technical background
Current, extremely thin glass plate is owing to its light transmission, in light weight and high physical strength potential are applicable to constantly diversified senior application.A kind of such application is for the video display cover glass plate of (especially comprising large screen plasma body and LCD television set).
The large screen television chance occupies a large amount of wall space, and these spaces have no attraction and also do not have use when television set is closed.Recently, some television manufacturer have begun to be provided at the television set that television set does not use provides localized lighting or minimum room illumination during (namely under so-called " video is closed " state).In some cases, on the bottom or other marginal portions that the luminous bar of edge installation or light-emitting section are arranged on television screen.
These methods can provide some illuminations, but pleasant not aesthetically, and do not meet what is called " one " design concept of the current institute of consumer preference.Manufacturer and consumer will be to being used for the more attractive of television set and out of Memory display or " video is closed " lighting solutions is interested more efficiently.Similarly the secondary monitor illumination can be the information display that for example is used for household electric appliances the commercialization advantage is provided.Under any situation, adopt cheap needs but light source and be used for design with aesthetic pleasant and make from the light input of light source and user's light is exported the display screen illuminator of maximized effective design efficiently.
Summary of the invention
According to the disclosure, the video display screen that has for the modified model display illumination system of video closed condition is provided, it provides higher illuminance with more low-cost and improved efficient.The system that provides is light-scattering system, these light-scattering systems make the light propagated in the main body of cover glass plate on a plurality of directions outwards scattering provide wide-angle illumination and/or the diffusion edge light from the edge of cover glass with the front from cover glass.
In specific embodiment, be applied with Anti Glare Coatings at edge at least and/or the borderline region of cover glass plate, its light of can be in the angular field of view of broadness propagating in plate is outwards towards spectators' scattering.Current anti-dazzle system for these displays (comprising coating or texturizing surfaces on the cover glass plate) only produces limited light scattering from the light source of current use.In addition, significant scattering only occurs under high visual angle, does not namely almost have light to be scattered in the direction vertical with the plane of display screen.The embodiment of display disclosed herein utilizes Anti Glare Coatings or surface, these Anti Glare Coatings or surface comprise the scattering position of the size with the light wavelength magnitude of being launched by lighting source, thereby are provided at the wide-angle scattering on the broad optical wavelength range.
The further embodiment of display disclosed herein comprises for the improvement design of injecting light expeditiously to the cover glass plate, so that the illuminance that is provided by display to be provided.In certain embodiments, the array of the large spot size light source with high-NA such as light-emitting diode (LED) array is set so that light beam is gone in the rear surface of cover glass plate.Then, light scattering layer or reflectance coating are positioned near the array and on the apparent surface of cover glass plate, so that the light that injects scattering or diffusion on large-scale angle.Therefore, can make scattered light from the edge-emission of cover glass plate or be directed to the scattering position in glass plate, the scattering position outwards guides light from display towards spectators.
Therefore, in first aspect, the disclosure provides video display screen, comprises the imaging display floater, is used for the cover glass plate of display floater and the light source that is used for light beam is gone into the cover glass plate.At least a portion of cover glass plate is provided with at least one light-scattering component, and this light-scattering component is the form of superficial layer or coating typically, but alternatively also can be the form that is dispersed in the light scattering phase in the main body of plate.At least a portion that light-scattering component is oriented to be injected into the source light in the plate is with outside direction scattering, and outside direction can comprise the part of the front surface of the edge of plate and/or plate.
In another aspect; the disclosure provides video display screen; comprise the imaging display floater, be used for the cover glass plate of display floater and the light source that is used for light beam is gone into the cover glass plate; wherein the imaging display floater has viewing areas, and the cover glass plate has the part of watching that covers viewing areas.In the specific embodiment of this display, the part of watching of cover glass plate is provided with light-scattering component at least, such as anti-dazzle photosphere, and the surf zone of the coating of plate or roughening for example.Also comprise the surf zone of roughening wherein have can be on angular range the effective embodiment of the roughness of scattered light, this angular range comprises the angle perpendicular to the outer surface of cover glass plate.
In aspect another; the disclosure provides a kind of video display screen; comprise the imaging display floater, be used for the cover glass plate of display floater and the light source that is used for light beam is gone into the cover glass plate, wherein the cover glass plate is provided with relative light-scattering body element or light scattering surface element relatively on its apparent surface near the part of light source at least.In the specific embodiment of this display, relative light scattering surface element comprises and is arranged on cover glass plate at least near the China ink of the light scattering on the part on the border of light source layer.
In aspect another; the disclosure provides a kind of video display screen; comprise the imaging display floater, be used for display floater the cover glass plate, be used for light beam is gone into light source and at least one light-scattering component on a cover glass plate part at least of cover glass plate; wherein light-scattering component is the multiple-level surface element, this multiple-level surface element be oriented to from the light scattering of light source in the cover glass plate.In a particular embodiment, light source is the array of high-NA LED device, and the multiple-level surface element comprises a plurality of China ink layers that are used for light is scattered to from device the cover glass plate that are arranged on the support membrane.
Also disclose the cover glass plate that comprises optics cavity, optics cavity can propagate into the light through guiding in the plane of plate efficiently to realize the controlled emissions from panel edges or primary flat.
The accompanying drawing summary
The hereinafter with reference accompanying drawing further describes video display disclosed herein, wherein:
Fig. 1 is the micrograph that is coated with the glass plate part of light diffusing particles;
Fig. 2 is the photo of part of cover glass plate that comprises the borderline region of the coating that supports light diffusing particles;
Fig. 3 a is the photo that presents from the high visual angle view of the light of the cover glass plate scattering that comprises conventional anti-dazzle superficial layer;
Fig. 3 b is the low visual angle view from the light of the glass plate scattering of Fig. 3 a;
Fig. 3 c is the low visual angle view from the light of the modified cover glass plate scattering that provides according to the disclosure;
Fig. 4 a and 4b are the schematic diagrames of the first illumination video display screen;
Fig. 5 a, 5b and 5c are the schematic diagrames of the second illumination video display screen;
Fig. 6 is the photo for the anti-reflective film with printer's ink layer of video display screen; And
Fig. 7 comprises the light that produce to be used for edge-emission with the photo of a view of the cover glass plate of optics cavity that the video screen border illumination is provided.
Describe in detail
Comprise that in the current method of display lighting under the video closed condition thereby photoconduction wherein or diode light-source are attached to the method that marginal position on display floater or the cover glass only provides edge light.Opaque perimeter strip is positioned usually to stop that light source avoids direct-view, and illumination is restricted to high visual angle from the light source scattering and only from the edge of display or the light of borderline region emission thus.
The video display that provides according to the disclosure comprises provides the cover glass of enhanced light scattering characteristic plate, thereby has significantly improved illuminance and need not to improve light source power.Optionally be applied to edge or the boundary member of cover glass plate at least such as anti-dazzle or the light scattering layer the antireflecting coating revised, to strengthen the scattering of light of in the cover glass plate, propagating from light source.
In a particular embodiment, comprise that the light scattering coated of individual layer or some layers of light diffusing particles is applied to the surface portion of cover glass plate.Applying can be by the liquid dispersion of dip-coating on the plate surface or injection light diffusing particles.If desired, so the plate of coating can be through Overheating Treatment so that particle be bonded to the plate surface, as by particle layer being merged or sinking in the glass surface.Afterwards, can further handle this plate and not damage light scattering coated according to the needs of making complete video display, comprise make this plate through be heated or chemical tempering to improve plate intensity.
The cover glass plate that is provided with aforesaid light scattering coated is provided for a plurality of important advantage that video is closed illumination.Use in visible wavelength range or near the scattering particles of particle size (for example in the 400-1000nm scope) light scattering irrelevant with angle is provided.Therefore, scattering no longer is limited to high visual angle and can takes place at the angular range of broadness, is included on the vertical and subvertical scattering direction with the plane of video display, thereby has greatly increased the light quantity that can be used for actual illumination.
In addition, for the particle size of 100nm at least, light scattering basically with Wavelength-independent.Therefore, the spectral characteristic of scattered light is subjected to better control, and according to the spectral characteristic of light source and the scattering properties of selected particle, can obtain broadband or arrowband scattering.Finally, the anti-glare or light scattering characteristic of this plate can be different on the zones of different of this plate, to allow the patterning of light source.
Fig. 1 of accompanying drawing is the electron micrograph of the part of glass plate, and this glass plate is provided with the coating that is arranged on its lip-deep light diffusing particles.In the broader area 12 that is covered by the individual layer particle, show and comprise that average particle size is the area of application 10 of the multilayered particles of 300nm.
Fig. 2 of accompanying drawing is the photo for the cover glass plate 20 of video display, and wherein the borderline region of plate 22 is covered by the coating of light diffusing particles.By in the alcohol suspension that the border of plate is immersed the 300nm particle, heat treatment applies this coating so that particle sinks to the plate surface to the degree of depth of about 100nm then.Thrown light on by led array in coated border.Can obviously see perpendicular to the significant light scattering level on the direction of this board plane from this photo.
The light diffuser plate of Fig. 1 and 2 is the explanation of the embodiment of disclosed video display, wherein the light scattering surface element is Anti Glare Coatings, wherein Anti Glare Coatings comprises the light diffusing particles layer, and wherein light diffusing particles for example is distributed in from the individual layer of the liquid dispersion deposition of particle.Also for example understand the latter's embodiment, wherein for example by heating glass so that particle layer merges the surface that the light diffusing particles layer is bonded to cover glass to the step of glass.
Also comprise the display that comprises coated cover glass plate, wherein the mean particle diameter of light diffusing particles is in the scope of 100-1000nm.Light scattering as implied above, that such particle diameter can be implemented on the broad wave-length coverage and (be included on the angle vertical with the front surface of video display screen or plane) on the broad range of scatter angles.The video of such display is closed illumination can comprise that wherein light source is the leaded light bar of led array or the display of fiber optic component by the light source of any compactness.
The cover glass plate that provides the commercial video display of anti-dazzle parts can utilize outer surface (surface that spectators face) at plate to have slight roughening provides gratifying dazzle to suppress.Yet even the fiber waveguide efficient of the corresponding main surfaces of plate is captured in the overwhelming majority of the light at injection plate edge in the plane of plate, the anti-glare surface of general type also only provides very limited light scattering.Therefore, the scattering that is provided by such surface only just can observe under the high angle of watching axle perpendicular to board plane usually.
Fig. 3 a of accompanying drawing and 3b are the photos of making comparisons from the scattered light intensity of the cover glass panel edges of throwing light on by led array.Illuminated cover glass plate comprises conventional anti-dazzle superficial layer in those accompanying drawings, watches this plate at the normal from board plane with high angle in Fig. 3 a, and watch this plate with the angle that is approximately perpendicular to this board plane in Fig. 3 b.Can find out obviously from the limited high angle characteristic of the light of these conventional anti-dazzle surface scatterings that from these photos the high angle scattering of Fig. 3 a is significant, and be extremely weak from the normal axis scattering of Fig. 3 b.
The embodiment that the video display of the cover glass plate that provides according to this specification is provided provides and guides light to extract efficiently, thereby the full screen illumination more much better than GPF (General Protection False glass is provided.Fig. 3 c of accompanying drawing is that the edge is perpendicular to the photo of the cover glass plate of the captured similar edge light of the axle on the plane on plate surface.Can obviously find out along this high-strength light from this plate scattering from this photo.Advantageously, when the edge light of baffle was closed, the high scattering efficiency of realizing in the cover glass plate of Fig. 3 can not damage video image displayed quality on the imaging display floater that is being positioned the cover glass rear significantly.
Thereby the significant difference between the significant difference illumination efficiency in the scattering properties between Fig. 3 a-b of accompanying drawing and Fig. 3 c is derived from the change of the surface roughness characteristics that exists in the anti-dazzle surface of two baffles.The conventional anti-dazzle cover glass plate that characterizes among Fig. 3 a and the 3b comprises the anti-dazzle superficial layer of roughening, and it has the surface roughness correlation length of 40 micron dimensions.As a comparison, the modified anti-dazzle superficial layer of the cover glass plate shown in Fig. 3 c has the roughness that about 500nm correlation length is provided.The favourable influence of short roughness correlation length (i.e. correlation length in the optical wavelength range of about 100-1000nm) has many.Except the irrelevant light scattering of angle was provided, this surperficial scattering efficiency improved, thereby video is closed the possible brightness of illumination and also is improved.Can easily modified anti-dazzle photosphere be extended to the whole surf zone that covers video display, thereby also improve potential brightness.
The schematically illustrated video display screen design that utilizes the light scattering of high efficiency cover glass in Fig. 4 of accompanying drawing.Fig. 4 comprises front view (a) and the end view (b) of video display screen 30, and this video display screen 30 comprises imaging display floater 32, is used for the cover glass plate 32 of display floater and the light source 36 that is used for injecting light into the cover glass plate.Cover glass plate 34 is included in the positive of this plate or watches modified anti-dazzle superficial layer (not shown) on the face (relative with display floater towards outer surface).In order to realize low angle and normal axis scattering efficiently, modified anti-dazzle photosphere has the surface roughness correlation length in visible wavelength range.
Anti-dazzle photosphere on the cover glass plate 34 covers the whole viewing areas 38 of video display, namely drop on be arranged on the baffle around opaque black boundary 39 in the zone.Border 39 is operated to shield the light source of for example being made up of led array 36 and is not looked at straight, and the combination on rear mounted LEDs array and shielding border gives " one " outward appearance for the video display screen of assembling.
Among the embodiment shown in Figure 4, adhesive layer 33 is set so that cover glass plate 34 is bonded to imaging display floater 32.This layer can be made up of the adhesive of the refractive index with the refractive index that is lower than display floater 32, with the loss of the light of avoiding being transmitted to adhesive layer or display floater in baffle.As shown in the figure be optional anti-reflecting layer 38, this anti-reflecting layer 38 separates with the outer surface of cover glass plate 34, to improve the image quality of display.In alternate configuration, this adhesive can be substituted by for example air gap of 2 μ m width at least, also is used for making the loss minimum of propagating in baffle through directing LED light.
Therefore; the embodiment of all video display screens as shown in the example above comprises that imaging display floater wherein has the screen of viewing areas; the cover glass plate has the part of watching that covers viewing areas, and the part of watching of cover glass plate is provided with the light-scattering component of superficial layer form.Specifically comprise a plurality of embodiment, wherein: light-scattering component is included in the roughened surface zone on the cover glass plate, and this roughened surface zone have can be on comprising perpendicular to the angular range of the angle of cover glass plate the roughness of scattered light effectively.For realizing this purpose, the roughened surface zone has the surface roughness correlation length that is lower than 1000nm.
Also comprise display screen, wherein the bond material layer is arranged between imaging display floater and the cover glass plate, and bond material has the refractive index of the refractive index that is lower than the cover glass plate.The display that substitutes is that the air gap is arranged on those displays between cover glass plate and the imaging display floater.
According to foregoing description and example, can use the method for various light sources and various installation light sources that video is closed the cover glass plate that the illumination light injection is used for video display screen.For cost reason and energy efficiency reason, it is favourable using LED on sale or other low-cost light source with large-numerical aperture and/or large spot size.Light source is installed on the rear surface of borderline region of cover glass plate rather than the method on the edge of plate supports current preferred " one " to show design alternative.
The light source that the rear is installed (have high-NA or other) is used for video and closes the light input efficiency that lighting requirement provides improvement.According to this specification, use improved scattering method that the necessary efficient of improving is provided.As hereinafter more complete open, such method can provide near 100% smooth input efficiency, can realize export or throw light on light wavelength or color are controlled via selectivity absorption and/or wavelength conversion, and can avoid the source alignment difficulty to a great extent.
Fig. 5 of accompanying drawing schematically shows the illustrative design of video display screen, and this video display screen comprises that the cover glass plate that can be used for the imaging display panel combination produces the display that strong video is closed illumination to provide.Comprise front view (a), end view (b) and the rearview (c) of display 40 among Fig. 5, this display 40 comprises the illumination cover glass plate 41 that is attached to imaging display floater 42.When the light source of being made up of led array 43 was activated, the cover glass plate of Fig. 5 was suitable for slave plate feather edge 41a emissive lighting light.
For the sufficient light light output of sufficient to guarantee from the bottom margin 41a of cover glass plate 41 is provided; make from the light of led array 43 between the reflective surface layer of two relative whites or " broadband " diffusive scattering repeatedly, the reflective surface layer of diffusive is near rear surface below the cover glass plate 41 is located in the installation site of led array 43.The reflective surface layer of the diffusive that these are relative forms optics cavity in the bottom of plate 41.For example, as shown in Figure 5, the reflective surface will district that can form expectation by the opaque ink perimeter strip 48a on the relative lower surface part that is arranged on glass plate 41 and 48b.Alternatively, by similarly relative roughened surface partly being positioned on the plate 41, or by the volume scattering (two kinds of situations are all not shown) from the particle scattering phase in the same bottom part that is distributed in plate 41, can realize the scattering of expecting.
By from the repeated reflection of white border bar 48a and 48b and the light of scattering will be angularly and diffusion in position, no longer be limited in degree between the bar up to reaching light.Can the derive Distribution Statistics of angle mould formula of escape light of statistics modeling, this Distribution Statistics will partly depend on from the volume of black perimeter strip and the balance between the surface scattering, and partly depend on the number of times of light reflection before light leaves the restriction of bar.
The light that is directed in the plane of the cover glass plate in the video display screen of Fig. 5 will be from the bottom margin 41a outgoing of this plate.If expectation from the restriction of reflection bar escape through guiding or without only a part of outgoing of the light of guiding, then can make reflexive ink-stick or other light-scattering component to outgoing district taperization, such taperization can effectively limit the amount of escape light, or makes escape light preferentially with selected angle outgoing.
For example, can replace white reflective ink 48a in the accompanying drawing and 48b to carry out control to the color of emergent light by using coloured China ink.Optionally absorb process from the repeatedly selected wavelength of the light of reflection of such China ink, thereby change the color of remaining light.The color control method that substitutes comprises the use nonlinear optical material, for example to glass or the crystal or the quantum dot that add to the reflectivity bar that is applied to glass.The quantum dot method realizes the patterning of emergent light, and this is because the point of different sizes can be realized the scattering of light of different wave length.
The specific embodiment of the video display screen of the disclosed element that comprises above-mentioned example comprises that wherein the part of cover glass plate at least is arranged on the embodiment that is attached to plate the apparent surface of plate near the position of the light source that is used for display screen and relative light-scattering body or surface element.Comprise following embodiment: wherein the facing surfaces element comprises the light scattering China ink layer on the part that is arranged on cover glass edges of boards circle at least; wherein relative light scattering China ink layer comprises provides the suspended particles of volume light scattering phase; or comprise the roughened surface that the surface light scattering is provided, and wherein light scattering China ink layer provides broadband (white light) reflectivity.The light source that is used for such display will advantageously comprise the array of LED device, be oriented to light beam is gone into the rear surface of cover glass plate.
Video for color-controlled system is closed illumination, and relative light scattering China ink layer will present light absorption or the reflectivity of wavelength selectivity, and perhaps cover glass will comprise the nonlinear optics scattering center that is positioned at glass surface or China ink layer inside.The nonlinear optics scattering center is advantageously selected from the group of being made up of light scattering crystal or quantum dot, and comprises that wherein the nonlinear optics scattering center is according to the embodiment of the display of pattern setting.
The video display screen embodiment that gives an example among Fig. 5 of accompanying drawing provides the bottom margin video to close illumination, and this bottom margin video is closed illumination at commercially attractive and efficient especially, wherein can utilize the light source of the array that comprises high-NA LED device.Yet; owing to comprise the multiple-level surface element for the light-scattering system that light is injected efficiently the cover glass plate; these multiple-level surface elements must be properly positioned to realize importing the repeated reflection of light between the apparent surface of plate, so such display screen design can involve great expense.Adopted repeatedly and applied to arrange necessary layer with the China ink that separates.
Further according to the disclosure, provide the following embodiment of disclosed display screen: wherein the multiple-level surface element exists with the form that is arranged on a plurality of China ink layers on the support membrane.Support membrane suitably comprises the antireflection rete the rete 44 in accompanying drawing 5.Before making up with the cover glass plate, support membrane for example is provided with a plurality of China ink layers by silk screen printing, with light scattering and the light source shielding in the control video display screen.
In specific example, the rear surface of this film is provided with black or other light absorption China ink layer, such as the border black ink layer 45 among Fig. 5 of accompanying drawing, this layer be configured to both to stop from the light of led array in order to avoid looked at straight from the angle perpendicular to display, serve as again display viewing areas around frame.Afterwards, the White-opalescent China ink layer that presents the diffusion scattering of white light in the mode of the China ink layer 48a of Fig. 5 can be applied to support membrane, is positioned on the tusche layer.The support membrane that will apply thus is attached to operation for the front of the cover glass plate of video display screen and makes light absorption and light scattering China ink layer the two correctly locatees to guarantee to scatter to efficiently from the light of led array the plane of cover glass plate subsequently.Fig. 6 of accompanying drawing comprises presenting according to being provided with of specific embodiment and absorbs tusche layer 55 and the photo of the edge direction view of the supporting anti-reflective film 54 of the reflective light scattering strip 58a that covers.Shown in view comprise the part of the uncoated side of this film.
When using direct acting China ink layer or print film that the efficient and economic method of light being injected efficiently the cover glass plate that comprises optics cavity is provided, the full glass process that has the optics cavity of similar efficient for structure will provide advantage aspect machinery and the thermal endurance degree.Therefore, according to the further embodiment of disclosed video display screen, the diffusive scattering layer of frit is applied and is bonded to the apparent surface of cover glass plate.
At the specific embodiment of the cover glass plate that is used for such screen, glass frit layers is applied to relative plate surface to replace as the relative light scattering China ink that is used for the scattered light guiding shown in Figure 5 of accompanying drawing layer or contain ink film.For frit embodiment, relative be arranged on position 48a and 48b place on the cover glass plate such as the plate 41 of Fig. 5 in conjunction with the white glass bed of material.Similar to China ink layer, the white bed of material provides the scattering of diffusion broadband, thereby forms optics cavity, can be injected into wherein and repeatedly reflection from the light such as the light source of led array.Produce angled light thus, between the corresponding main surfaces of cover glass plate, being directed, and in the plane of plate, be transmitted to the position such as panel edges, but light in these position outgoing to be used for illumination.In certain embodiments; the opaque black on the border through locating the tusche layer 45 that is used for setting Fig. 5 or other light absorption China ink or the bed of material are superimposed on the bed of material and arrange; both be used for hiding led array so that it is not looked at straight, be used for providing the border of the video display that comprises the cover glass plate again.
Report is applicable to the example of the frit compound of commercial cover glass plate in following form 1, such as for example Code2318 of Corning Incorporated alkalescence alumina silicate glass plate.As calculating according to the batch from source glass, report the frit compound based on the molar percentage of oxide.Also reported the glass transformation temperature (T that determines at each sample in the table 1
g), glass transition temperature (T
s), mean thermal expansion coefficients and the fusion temperature (T that is used for glass frit layers is bonded to protector plate for glass
f).
Table 1---glass frit compositions
The composition of report only is to can be used for controlling the explanation from the various material compounds of the light scattering of cover glass plate in the table 1.In addition, can change many kinds of compounds in these compounds to change their light scattering characteristic.For example, the routine such as titanium oxide, zirconia and/or tin oxide can be caused opaque additive to cover in glass or the material preformed objects, to strengthen the opacity of the bed of material.Alternatively or as additional, light absorber or phosphor can be covered in glass or the material color of change source light when propagating the optics cavity by being formed by material at source light.
Fig. 7 of accompanying drawing comprises and comprises the photo that applies the cover glass plate of the optics cavity that the bed of material forms by aforesaid, and this photo will be watched in the face of spectators' plate surface from the video display screen that comprises this cover glass plate.As shown in Figure 7; bottom boundary along cover glass plate 61 partly is provided with the white light scattering in conjunction with preceding bed of material 68a, and this white light scattering locatees form optics cavity along baffle bottom boundary in conjunction with bed of material (not shown) in conjunction with preceding bed of material 68a after with respect to the white light scattering.The light source of being made up of the illumination LED array also is attached to the rear surface (not shown) of plate, and this array is hidden by the opaque secret note 65 that is applied to light scattering bed of material 68a in order to avoid from the front direct-view of cover glass plate.
From the major part propagated by the optics cavity that forms in conjunction with the bed of material through the bottom margin 61a outgoing of guiding light from cover glass plate 61.Yet in addition, but some are through side and the top outgoing of guiding light slave plate 61, for example shown in the 61b of position.
The cover glass plate of Fig. 7 has illustrated the cover glass plate embodiment of the present disclosure that comprises along the optics cavity of at least one boundary member of plate, comprises that the boundary member of this plate wherein is provided with the embodiment at the lip-deep relative light scattering surface element of relative plate of boundary member.Light scattering surface element among these embodiment can comprise and for example is arranged on the lip-deep diffusive scattering of plate China ink layer, or be bonded to the diffusive scattering bed of material on plate surface.In addition, as shown in Figure 7, opaque shielding layer can be arranged at least one light scattering surface element when needed, with user's direct-view of the video display screen that covers the not involved cover glass as described of light source plate.
Though below the specific example of reference material, layout, design and operation has been provided by video display screen and the assembly that provides according to the disclosure, but can recognize, those examples only are to provide for illustrative purposes, and can adopt the various modifications of those examples to satisfy the needs of the similar or related application within the scope of the appended claims that falls.
Claims (41)
1. video display screen; comprise the imaging display floater, be used for the cover glass plate of display floater and the light source that is used for light beam is gone into the cover glass plate; wherein the part of cover glass plate is provided with at least one light-scattering body element or surface element at least, described at least one light-scattering body element or surface element can be effectively with the part of light with the scattered through angles perpendicular to the plane of cover glass plate.
2. video display screen as claimed in claim 1 is characterized in that, described light scattering surface element is Anti Glare Coatings.
3. video display screen as claimed in claim 1 is characterized in that, described Anti Glare Coatings comprises the layer of light diffusing particles.
4. video display screen as claimed in claim 1 is characterized in that, described light diffusing particles distributes with individual layer, and is deposited on the described cover glass plate from the liquid dispersion of particle.
5. video display screen as claimed in claim 1 is characterized in that, the layer of described light diffusing particles is merged the surface to described cover glass plate.
6. video display screen as claimed in claim 1 is characterized in that, described cover glass plate is through overheated or chemical tempering.
7. video display screen as claimed in claim 1 is characterized in that, described light source is leaded light bar or fiber optic component.
8. video display screen as claimed in claim 1 is characterized in that, described light source is led array.
9. video display screen as claimed in claim 1 is characterized in that, described light diffusing particles has the average particle size in the 100-1000nm scope.
10. video display screen as claimed in claim 1 is characterized in that, described light diffusing particles scattered light on angular range, and described angular range comprises the angle perpendicular to the front of described video display screen.
11. video display screen as claimed in claim 1 is characterized in that, the part of described cover glass plate comprises opaque layer, and described opaque layer is oriented to cover described light source so that it is not looked at straight from the angle perpendicular to the surface of described video display screen.
12. video display screen; comprise the imaging display floater, be used for the cover glass plate of display floater and the light source that is used for light beam is gone into the cover glass plate; at least a portion of described cover glass plate is provided with at least one light-scattering body element or surface element; wherein said imaging display floater has viewing areas; described cover glass plate has the part of watching that covers described viewing areas, and wherein the described part of watching of described at least cover glass plate is provided with described light-scattering component.
13. video display screen as claimed in claim 12; it is characterized in that; described light-scattering component is included in the roughened surface zone on the described cover glass plate, and described roughened surface zone have can be on comprising perpendicular to the angular range of the angle of cover glass plate the roughness of scattered light effectively.
14. video display screen as claimed in claim 13 is characterized in that, described roughened surface zone has the surface roughness correlation length that is lower than 1000nm.
15. video display screen as claimed in claim 12 is characterized in that, be provided with the bond material layer between described imaging display floater and described cover glass plate, and wherein said bond material has the refractive index of the refractive index that is lower than described cover glass plate.
16. video display screen as claimed in claim 12 is characterized in that, is provided with the air gap between described cover glass plate and described imaging display floater.
17. video display screen; comprise the imaging display floater, be used for the cover glass plate of display floater and the light source that is used for light beam is gone into the cover glass plate, wherein its apparent surface of the part of described at least cover glass plate is provided with relative light-scattering body element or surface element.
18. video display screen as claimed in claim 17 is characterized in that, described facing surfaces element comprises the light scattering China ink layer on the part on the border that is arranged on described at least cover glass plate.
19. video display screen as claimed in claim 18 is characterized in that, described light scattering China ink layer provides broadband reflection.
20. video display screen as claimed in claim 17 is characterized in that, described light source comprises the array of LED device, and the array of described LED device is positioned light beam to be gone into the rear surface of described cover glass plate.
21. video display screen as claimed in claim 17; it is characterized in that; the part of described cover glass plate comprises opaque layer, and described opaque layer is oriented to cover described light source so that it is not looked at straight from the angle perpendicular to the surface of described video display screen.
22. video display screen as claimed in claim 18 is characterized in that, described relative light scattering China ink layer comprises provides the suspended particles of volume light scattering phase.
23. video display screen as claimed in claim 18 is characterized in that, described relative light scattering China ink layer comprises the roughened surface that the surface light scattering is provided.
24. video display screen as claimed in claim 18 is characterized in that, described relative light scattering China ink layer presents light absorption or the reflectivity of wavelength selectivity.
25. video display screen as claimed in claim 17 is characterized in that, described cover glass plate is included in the glass surface or is arranged on nonlinear optics scattering center in the light scattering China ink layer on the glass surface.
26. video display screen as claimed in claim 25 is characterized in that, described nonlinear optical scattering center is selected from the group of being made up of light scattering crystal and quantum dot.
27. video display screen as claimed in claim 25 is characterized in that, described nonlinear optical scattering center arranges according to pattern.
28. video display screen; comprise the imaging display floater, be used for display floater the cover glass plate, be used for light beam is gone into the light source of cover glass plate; the part of described at least cover glass plate is provided with at least one light-scattering body element or surface element; wherein said light-scattering component is the multiple-level surface element, and described multiple-level surface element is positioned that light is scattered to the cover glass plate from light source.
29. video display screen as claimed in claim 28 is characterized in that, described light source is the array of high-NA LED device.
30. video display screen as claimed in claim 28 is characterized in that, described multiple-level surface element comprises a plurality of China ink layers that are arranged on the support membrane.
31. video display screen as claimed in claim 28 is characterized in that, described support membrane is anti-reflective film.
32. video display screen as claimed in claim 28 is characterized in that, the described support membrane with a plurality of China ink layers is attached to described cover glass plate.
33. video display screen as claimed in claim 28 is characterized in that, described a plurality of China ink layers comprise the white ink layer that presents the diffused light scattering.
34. video display screen as claimed in claim 28 is characterized in that, described a plurality of China ink layers comprise light absorption China ink layer.
35. video display screen as claimed in claim 28 is characterized in that, described a plurality of China ink layers are positioned with from the edge scatter of the described cover glass plate part of light at least.
36. a cover glass plate that is used for video display screen comprises along the optics cavity of at least one boundary member of described plate.
37. cover glass plate as claimed in claim 36 is characterized in that, the boundary member of described plate is provided with at the lip-deep relative light scattering surface element of the relative plate of described boundary member.
38. cover glass plate as claimed in claim 37 is characterized in that, described light scattering surface element provides the white light scattering layer of diffusion broadband light scattering.
39. cover glass plate as claimed in claim 37 is characterized in that, described light scattering surface element comprises the scattering China ink layer that is arranged on the lip-deep diffusive of plate.
40. cover glass plate as claimed in claim 37 is characterized in that, described light scattering surface element comprises the scattering bed of material of the diffusive that is bonded to the plate surface.
41. cover glass plate as claimed in claim 37 is characterized in that, at least one light scattering surface element is provided with opaque shielding layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40769810P | 2010-10-28 | 2010-10-28 | |
| US61/407,698 | 2010-10-28 | ||
| PCT/US2011/057032 WO2012058084A2 (en) | 2010-10-28 | 2011-10-20 | Video screen cover glass illumination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103283218A true CN103283218A (en) | 2013-09-04 |
| CN103283218B CN103283218B (en) | 2017-10-13 |
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ID=45994665
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180061959.0A Expired - Fee Related CN103283218B (en) | 2010-10-28 | 2011-10-20 | Video screen protective glass is illuminated |
Country Status (5)
| Country | Link |
|---|---|
| JP (2) | JP2013543989A (en) |
| KR (1) | KR101716930B1 (en) |
| CN (1) | CN103283218B (en) |
| TW (1) | TWI531811B (en) |
| WO (1) | WO2012058084A2 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI531811B (en) | 2016-05-01 |
| JP6564352B2 (en) | 2019-08-21 |
| KR101716930B1 (en) | 2017-03-15 |
| JP2013543989A (en) | 2013-12-09 |
| TW201226961A (en) | 2012-07-01 |
| JP2016195133A (en) | 2016-11-17 |
| WO2012058084A3 (en) | 2012-07-05 |
| WO2012058084A2 (en) | 2012-05-03 |
| KR20130139299A (en) | 2013-12-20 |
| CN103283218B (en) | 2017-10-13 |
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