WO2009072697A1 - Panneau optique à guides d'onde de diffusion de lumière pour rétroéclairage - Google Patents

Panneau optique à guides d'onde de diffusion de lumière pour rétroéclairage Download PDF

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Publication number
WO2009072697A1
WO2009072697A1 PCT/KR2008/001139 KR2008001139W WO2009072697A1 WO 2009072697 A1 WO2009072697 A1 WO 2009072697A1 KR 2008001139 W KR2008001139 W KR 2008001139W WO 2009072697 A1 WO2009072697 A1 WO 2009072697A1
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WO
WIPO (PCT)
Prior art keywords
light
light diffusing
optical panel
diffusion part
backlight according
Prior art date
Application number
PCT/KR2008/001139
Other languages
English (en)
Inventor
Jong Son Lyu
Nam Ihn Cho
Original Assignee
Sunmoon University Industry Cooperation Foundation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunmoon University Industry Cooperation Foundation filed Critical Sunmoon University Industry Cooperation Foundation
Publication of WO2009072697A1 publication Critical patent/WO2009072697A1/fr

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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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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

Definitions

  • the present invention relates, in general, to optical panels for backlight and, more particularly, to an optical panel for backlight in which light diffusing waveguides are formed in a light guide plate for backlight, thus providing even brightness to a backlight unit despite the arrangement of a reduced number of light sources.
  • CCFLs cold cathode fluorescent lamps
  • 'BLUs' backlight units
  • LEDs can realize low power consumption by virtue of the use of relatively low voltage and can easily be adapted to the thin BLUs. At present, LEDs are widely used as light sources in small or medium-sized LCDs having relatively small screens.
  • FIG. 1 is a view illustrating an edge-emitting BLU 10 using
  • the LED light sources 12 are provided on a printed circuit board 11 which is thin and long.
  • the LED light sources 12 face a light incident surface 14a of a light guide plate 14.
  • a reflective cover 13 is provided behind the LED light sources 12 such that most of the light emitted from the LED light sources 12 travels to the light incident surface 14a of the light guide plate 14. Due. to total reflection, light which enters the light guide plate 14 through the light incident surface 14a travels to a distal end surface 14b which is opposite the light incident surface 14a. In this process, some of the light is emitted to the outside through the upper surface of the light guide plate 14 by a dispersion pattern (not shown) which is formed in the lower surface of the light guide plate 14.
  • End surfaces of the light guide plate 14, other than the light incident surface 14a, and the lower surface of the light guide plate 14 are covered with a reflective film 15 to prevent light loss.
  • Light which has passed through the upper surface of the light guide plate 14 is evenly diffused because of having passed through a diffusion sheet 16, and the directional controllability of the light and the brightness thereof are increased by prism sheets 17a and 17b which are placed on the diffusion sheet.
  • Light which finally passes through a protective film 18 enters an LCD panel (not shown).
  • FIG. 2 is a view showing dark areas formed on a light guide plate of a conventional edge-emitting BLU according to a conventional technique.
  • FIG. 3 is a view showing one example of a structure for reducing dark areas formed on a light guide plate of an edge-emitting BLU according to another conventional technique.
  • LEDs 22 are provided on a PCB 21 which has a thin bar shape, so that light 24a emitted from the LEDs 22 enters the light guide plate 23a.
  • a dark area 25a is formed around the light incident surface of the light guide plate 23a at a position between the adjacent LEDs 22.
  • the dark areas 25a of the light guide plate 23a reduce the brightness of the BLU and stain it. Therefore, to reduce the dark areas, an unable display width 26a is required, with the result that the viable size of the LCD screen is reduced.
  • FIG. 3 is a perspective view of the light guide plate having the structure of FIG. 3.
  • the sawtooth-shaped pattern 27 is formed on the light incident surface of the light guide plate 23b.
  • a height 27a of the sawtooth-shaped pattern 27 is the same as the thickness of the light incident surface of the light guide plate.
  • a lower base 27b and a height 27c of one tooth portion of the sawtooth-shaped pattern 27 range from several tens of micrometers to 1 mm.
  • edge-emitting BLU 20 of FIGS. 3 and 4 is also problematic in that there is a limitation in the achievable uniformity of the brightness if the distance between the light sources is increased.
  • an object of the present invention is to provide an optical panel having light diffusing waveguides for backlight which is constructed such that dark areas are prevented from being formed on the optical panel of a BLU using LED light sources, thus making the brightness of the BLU even, thereby providing even luminosity to an LCD panel.
  • the present invention provides an optical panel for backlight, comprising a light source, a reflective film, a light guide plate and a plurality of optical sheets, wherein the light guide plate comprises a light diffusion part, with a light diffusing waveguide formed on a portion of the light diffusion part, through which light emitted from the light source enters the light guide plate.
  • the light diffusing waveguide may comprise a plurality of light diffusing waveguides formed on the light diffusion part, the plurality of light diffusing waveguides being spaced apart from each other at predetermined intervals and oriented at a predetermined angle with respect to a light incidence direction to diffuse a direction in which the light is projecting.
  • a length of the light diffusion part may range from 0.5 mm to 5 mm.
  • the light diffusing waveguide may be convexly formed on each of upper and lower surfaces of the light diffusion part.
  • the light diffusing waveguide formed on the upper surface of the light diffusion part and the light diffusing waveguide formed on the lower surface of the light diffusion part may be oriented in directions crossing over each other based on the light incidence direction.
  • the light diffusing waveguide may be formed to have a convex structure by carving an embossment in each of the upper and lower surfaces of the light diffusion part or to have a concave structure by engraving a depression in each of the upper and lower surfaces of the light diffusion part.
  • the light diffusing waveguide formed on the upper surface of the light diffusion part and the light diffusing waveguide formed on the lower surface of the light diffusion part may be oriented in directions crossing over each other based on the light incidence direction.
  • the light diffusing waveguide may have a linear, curved or variable shape.
  • the light diffusing waveguide may be constant in thickness.
  • the variable light diffusing waveguide may be narrow and thin on a front end thereof, be increased in width and thickness from the front end to a medial portion thereof, and be reduced in thickness from the medial portion to a rear end thereof .
  • a cross-section of the light diffusing waveguide may be triangular, rectangular or semicircular.
  • a height of a cross-section of the light diffusing waveguide may range from 0.05 mm to 0.5 mm.
  • a width of the light diffusing waveguide may range from 0.05 mm to 1 mm.
  • the interval between the adjacent light diffusing waveguides may be within 2 mm.
  • a sawtooth-shaped pattern may be formed on a light incident surface of the light diffusion part.
  • light diffusing waveguides are formed on an optical panel which faces LEDs that are linearly arranged, so that dark areas which have been formed on a light guide plate between the LEDs in the conventional techniques can be eliminated. Therefore, the present invention can provide even luminosity to the optical panel and prevent a loss of the viable size of an LCD screen.
  • the density of the arranged light sources that is, the number of light sources, can be reduced, the cost of manufacturing the BLU can be reduced.
  • FIG. 1 is a view illustrating an edge-emitting BLU using LED light sources
  • FIG. 2 is a view showing dark areas formed on a light guide plate of an edge-emitting BLU according to a conventional technique
  • FIG. 3 is a view showing one example of a structure for reducing dark areas formed on a light guide plate of an edge- emitting BLU according to another conventional technique
  • FIG. 4 is a perspective view of the light guide plate having the structure of FIG. 3;
  • FIG. 5 is of a perspective view (a) and a partial plan view (b) showing an optical panel having light diffusing waveguides for backlight, according to a first embodiment of the present invention
  • FIGS. 6 and 7 are front views (a) and side views (b) showing shapes of examples of a light diffusion part according to the present invention
  • FIGS. 8 through 13 are views showing shapes of several examples of the light diffusing waveguides of the optical panel according to the present invention
  • FIG. 14 is of views showing several examples of the arrangement of the light diffusing waveguides of the optical panel according to the present invention
  • FIG. 15 is of a perspective view (a) and a partial plan view (b) showing an optical panel having light diffusing waveguides for backlight, according to a second embodiment of the present invention
  • FIG. 16 is a perspective view of an optical panel having light diffusing waveguides for backlight, according to a third embodiment of the present invention.
  • FIG. 5 is of a perspective view (a) and a partial plan view (b) showing an optical panel having light diffusing waveguides for backlight, according to a first embodiment of the present invention.
  • FIGS. 6 and 7 are front views (a) and side views (b) showing shapes of examples of a light diffusion part according to the present invention.
  • the optical panel having the light diffusing waveguides for backlight according to the present invention includes a light guide plate body 110, a light diffusion part 120, the light diffusing waveguides 121 and a dispersion pattern 130.
  • the light diffusing waveguides 121 are formed on the light diffusion part 120 which is formed adjacent to a light incident surface 111 of the light guide plate 100 into which light emitted from LEDs (not shown) enters. Thus, light emitted from the LEDs is diffused by the light diffusing waveguides 121.
  • each light diffusing waveguide 121 has a height 121a ranging from 0.05 mm to 0.5 mm and a width 121b ranging from 0.05 mm to 1 mm.
  • the light diffusing waveguides 121 may be close to each other without an interval therebetween or, alternatively, the light diffusing waveguides 121 may be spaced apart from each other at regular intervals of 2 mm or less.
  • the light diffusion part 120 has a length 12 Id ranging from about 0.5 mm to about 5 mm, which may be varied depending on the size of the light guide plate 100, of course.
  • the light diffusing waveguides 121 are arranged such that the axes thereof are parallel to each other so as to diffuse the direction in which the light emitted from the LEDs is projecting, and each light diffusing waveguide 121 has a semicircular cross-section.
  • the light diffusing waveguides 121 are provided on the upper and lower surfaces of the light diffusion part 120 of the light guide plate 100.
  • the light diffusing waveguides 121 of the upper surface of the light diffusion part 120 are oriented in the direction crossing over the light diffusing waveguides 121 of the lower surface thereof, such that light is evenly diffused to the left and right.
  • Light which has been diffused in the light guide plate 100 travels to an LCD panel (not shown) through the upper surface of the light guide plate 100 after being deflected by the dispersion pattern 130 which is formed in the lower surface of the light guide plate body 110.
  • FIG. 6 illustrates an example of the light diffusing waveguides 121 which are provided on the upper and lower surfaces of the light guide plate 100 such that they are convex from the upper and lower surfaces of the light guide plate 100.
  • FIG. 7 illustrates another example of light diffusing waveguides 121 which are formed on the upper and lower surfaces of the light guide plate 100 by carving embossments in the light diffusion part 120 of the light guide plate 100. Particularly, in the case of FIG. 7, the light diffusion part 120 can be prevented from becoming thicker than the light guide plate 100.
  • FIGS. 8 through 13 are views showing shapes of several examples of the light diffusing waveguides of the optical panel according to the present invention.
  • each light diffusing waveguide according to the present invention has a linear, curved or variable shape.
  • FIG. 8 illustrates straight linear light diffusing waveguides, each of which has a triangular (a), semicircular (b) or rectangular (c) cross-section.
  • each light diffusing waveguide may have an elliptical or polygonal cross-section, and the present invention is not limited to these shapes. The same applies to the cases of FIGS. 9 and 10, as well.
  • FIG. 9 illustrates a light diffusing waveguide which has one of the above-mentioned cross-sections but has a curved shape.
  • FIG. 10 illustrates a light diffusing waveguide which has one of the above-mentioned cross-sections but is narrow and thin on the front end thereof, is increased in width and thickness from the front end to the medial portion, and is reduced in thickness from the medial portion to the rear end.
  • the light diffusing waveguide may be formed such that the opposite ends thereof are level with the surface of the light guide plate.
  • the light diffusing waveguides 121 may be formed such that they are convex from the upper and lower surfaces of the light diffusion part 120 of the light guide plate 100 or, alternatively, the light diffusing waveguides 121 may be formed on the upper and lower surfaces of the light diffusion part 120 by carving embossments in the light diffusion part 120.
  • light diffusing waveguides according to the present invention may be formed by engraving depressions in the upper and lower surfaces of the light diffusion part of the light guide plate, and each light diffusing waveguide has a cross-sectional shape corresponding to one of the shapes of FIGS. 8 through 10.
  • each light diffusing waveguide may also have a linear, curved or variable shape. That is, FIG. 11 illustrates straight linear light diffusing waveguides, each of which has a triangular (a), semicircular (b) or rectangular (c) cross-section. As well as cross-sectional shapes such as these, each light diffusing waveguide may have an elliptical or polygonal cross-section, and the present invention is not limited to these shapes . The same applies to the cases of FIGS. 12 and 13, as well.
  • FIG. 12 illustrates a light diffusing waveguide which has one of the above-mentioned cross-sections but has a curved shape.
  • FIG. 13 illustrates a light diffusing waveguide which has one of the above-mentioned cross-sections but is narrow and shallow on the front end thereof, is increased in width and depth from the front end to the medial portion, and is reduced in depth from the medial portion to the rear end.
  • the light diffusing waveguide may be formed such that the opposite ends thereof are level with the surface of the light guide plate.
  • FIG. 14 is of views showing several examples of the arrangement of the light diffusing waveguides of the optical panel according to the present invention.
  • light diffusing waveguides 121 which are formed on the upper surface of the light diffusion part 120 of the light guide plate 100 alternate with light diffusing waveguides 121 which are formed on the lower surface of the light diffusion part 120.
  • the light diffusing waveguides 121 which are formed on each of the upper and lower surfaces of the light diffusion part 120 are spaced apart from each other at regular intervals D.
  • each of the light diffusing waveguides 121 which are formed on the upper and lower surfaces of the light diffusion part 120 of the light guide plate 100 has a semicircular cross-section, and the light diffusing waveguides 121 are arranged such that they are close to each other and without an intervening interval.
  • each of light diffusing waveguides 121 which are formed on the upper and lower surfaces of the light diffusion part 120 of the light guide plate 100 has a triangular cross-section, and the light diffusing waveguides 121 are arranged such that they are close to each other and without an intervening interval .
  • FIG. 15 is of a perspective view (a) and a partial plan view (b) showing an optical panel having light diffusing waveguides for backlight, according to a second embodiment of the present invention.
  • light diffusing waveguides 221 which have semicircular cross-sections and are curved with respect to the longitudinal direction are formed on a light guide plate 200.
  • the curved light diffusing waveguides 221 which diffuse the direction in which light emitted from the LEDs is projecting are formed on the light diffusion part 220 of the light guide plate 200 at positions spaced apart from each other at regular intervals.
  • Each light diffusing waveguide 221 has a semicircular cross-section and is formed into a convex structure such that the lower surface thereof is level with the upper or lower surface of the light diffusion part 220 of the light guide plate 200.
  • the light diffusing waveguides 221 may be formed by carving embossments in the upper and lower surfaces of the light diffusion part 220 or, alternatively, they may be formed by engraving depressions in the upper and lower surfaces of the light diffusion part 220. Furthermore, as shown in FIG.
  • the light diffusing waveguides 221 are provided on the upper and lower surfaces of the light diffusion part 220 such that the light diffusing waveguides 221 of the upper surface of the light diffusion part 220 are oriented in the direction crossing over the light diffusing waveguides 221 of the lower surface thereof, so that light is evenly diffused to the left and right.
  • Light which has been diffused in the light guide plate 200 travels to an LCD panel (not shown) through the upper surface of the light guide plate 200 after being deflected by a dispersion pattern (not shown) which is formed in the lower surface of the light guide plate body 210.
  • FIG. 16 is a perspective view of an optical panel having light diffusing waveguides for backlight, according to a third embodiment of the present invention.
  • a pattern 330 which has a sawtooth shape is further formed on a light incident surface of a light guide plate 300, and, of the shapes of the examples of the light diffusing waveguides according to the present invention, light diffusing waveguides 321 which have semicircular cross-sections are formed on the light guide plate 300 having the patterns 330.
  • the direction in which light emitted from the LEDs is projecting can be further widely diffused on the light diffusion part 320 formed in the light guide plate 300.
  • Each light diffusing waveguide 321 has a semicircular cross-section and is formed into a convex structure such that the lower surface thereof is level with the upper surface of the light guide plate 300.
  • each light diffusing waveguide 321 may have various shapes shown by the above- described several examples of the shape of the light diffusing waveguide.
  • the light diffusing waveguides 321 may be formed by carving embossments in the upper and lower surfaces of the light diffusion part 320 or, alternatively, they may be formed by engraving depressions in the upper and lower surfaces of the light diffusion part 320.
  • the light diffusing waveguides 321 may be provided on the upper and lower surfaces of the light diffusion part 320 such that the light diffusing waveguides 321 of the upper surface of the light diffusion part 320 are oriented in the direction crossing over the light diffusing waveguides 321 of the lower surface thereof.
  • the shape and cross-section of each light diffusing waveguide 321 are the same as those of the above-mentioned other embodiments •
  • the light diffusion part 120, 220, 320 and the light diffusing waveguides 121, 221, 321 transmit light, which is emitted from the LED light sources and enters the light guide plate 100, 200, 300, to dark areas which are defined between the light sources, thus markedly reducing an unusable display width, compared to the conventional LED BLUs.
  • the light diffusing waveguides 121, 221, 321 may be formed by machining or pressing portions of the light guide plate 100, 200, 300.
  • the light diffusing waveguides 121, 221, 321 be made of the same material as that of the light guide plate 100, 200, 300.
  • the light guide plate 100, 200, 300 is made of transparent material, such as glass, resin, silicone, etc., having high light transmissivity.
  • the optical panel having the fine light diffusing waveguides according to the present invention has been illustrated as being applied to the BLU, it may be used in a planar display plate, such as an advertising plate, a sign plate, etc., using a light source or being used to transmit light, which is radially diffused from light sources arranged into a linear or lattice shape, to a planar plate, such as a light guide plate, a diffusion plate or other optical panels, at even brightness.
  • CCFLs cold cathode fluorescent lamps
  • BLUs bidirectional low cathode fluorescent lamps
  • various attempts to substitute LEDs for CCFLs have been performed, because the LEDs can realize low power consumption by virtue of the use of relatively low voltage and can be easily adapted to the thin BLUs.
  • LEDs are widely used as light sources in small or medium-sized LCDs having relatively small screens.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne un panneau optique pour rétroéclairage. Plus particulièrement, la présente invention concerne un panneau optique pour rétroéclairage dans lequel des guides d'onde de diffusion de lumière (121) sont formés dans une plaque de guide de lumière (100) pour rétroéclairage, permettant d'obtenir une luminosité uniforme dans une unité à rétroéclairage en dépit d'un agencement d'un nombre réduit de sources lumineuses.
PCT/KR2008/001139 2007-12-05 2008-02-27 Panneau optique à guides d'onde de diffusion de lumière pour rétroéclairage WO2009072697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070125251A KR20090058612A (ko) 2007-12-05 2007-12-05 광 확산 도파로를 형성한 백라이트용 광학패널
KR10-2007-0125251 2007-12-05

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WO2009072697A1 true WO2009072697A1 (fr) 2009-06-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012058304A3 (fr) * 2010-10-28 2012-07-19 Banyan Energy, Inc. Éléments optiques de réorientation destinés à des systèmes de concentration et d'éclairage
EP3179161A1 (fr) * 2015-12-11 2017-06-14 Glas Trösch Holding AG Élément d'éclairage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10007047B2 (en) 2010-12-23 2018-06-26 Samsung Display Co., Ltd. Display apparatus having thermally protected backlight assembly
KR101137796B1 (ko) * 2011-05-30 2012-04-18 주식회사 앤앤드에프 광학부재 및 그 제조방법
KR101229268B1 (ko) * 2011-10-31 2013-02-04 최대규 도광판의 패턴 성형방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003140150A (ja) * 2001-11-08 2003-05-14 Hitachi Ltd 背面照明装置およびこれを用いた液晶表示装置並びに液晶表示装置の照明方法
JP2006120591A (ja) * 2004-10-25 2006-05-11 Samsung Electronics Co Ltd 導光板と、これを具備したバックライトアセンブリー及び表示装置
JP2006261064A (ja) * 2005-03-18 2006-09-28 Hitachi Chem Co Ltd 導光板及びバックライト装置
KR20070060693A (ko) * 2005-12-09 2007-06-13 삼성전자주식회사 백라이트 어셈블리 및 이를 갖는 표시장치
JP2007294230A (ja) * 2006-04-25 2007-11-08 Nippon Leiz Co Ltd 導光板および平面照明装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003140150A (ja) * 2001-11-08 2003-05-14 Hitachi Ltd 背面照明装置およびこれを用いた液晶表示装置並びに液晶表示装置の照明方法
JP2006120591A (ja) * 2004-10-25 2006-05-11 Samsung Electronics Co Ltd 導光板と、これを具備したバックライトアセンブリー及び表示装置
JP2006261064A (ja) * 2005-03-18 2006-09-28 Hitachi Chem Co Ltd 導光板及びバックライト装置
KR20070060693A (ko) * 2005-12-09 2007-06-13 삼성전자주식회사 백라이트 어셈블리 및 이를 갖는 표시장치
JP2007294230A (ja) * 2006-04-25 2007-11-08 Nippon Leiz Co Ltd 導光板および平面照明装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012058304A3 (fr) * 2010-10-28 2012-07-19 Banyan Energy, Inc. Éléments optiques de réorientation destinés à des systèmes de concentration et d'éclairage
EP3179161A1 (fr) * 2015-12-11 2017-06-14 Glas Trösch Holding AG Élément d'éclairage

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