CN102667308B - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- CN102667308B CN102667308B CN201080050032.2A CN201080050032A CN102667308B CN 102667308 B CN102667308 B CN 102667308B CN 201080050032 A CN201080050032 A CN 201080050032A CN 102667308 B CN102667308 B CN 102667308B
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- CN
- China
- Prior art keywords
- guide plate
- light guide
- lighting device
- light
- led
- 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.)
- Expired - Fee Related
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Planar Illumination Modules (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Disclosed is a lighting device which utilizes LEDs, and has good light scattering properties, reduced glare when looked straight in the eye and also has advantageous properties of the LEDs. Specifically disclosed is a lighting device (1) comprising: a light guide plate (2) that can eject light introduced through an edge surface thereof through the main surface thereof; and multiple LEDs (3) arranged on the edge surface. In the lighting device (1), the length (L) (cm) of the light guide plate (2) in the light-guiding direction and the width (W) (cm) of the light guide plate (2) orthogonal to both the light-guiding direction and the direction of the thickness of the light guide plate (2) meet the requirement represented by the formula: W/L >= 10, and the number of the LEDs (3) is (W/L)/2 or more. The lighting device (1) additionally comprises: a frame body (4) which accommodates the light guide plate (2) and the LEDs (3); and a power terminal (5) for the LEDs (3), which is arranged on at least one end part of the frame body (4) which corresponds to the direction of width of the light guide plate (2).
Description
Technical field
The present invention relates to the lighting device being installed on indoor ceiling etc. and using.
Background technology
As the illumination being installed on ceiling etc., used incandescent lamp, fluorescent lamp etc. in the past., the energy-conservation requirement in recent years in lighting field improves, and incandescent lamp has problems in efficiency of energy utilization and in the life-span in this.In addition, although on the other hand fluorescent lamp is superior in energy efficiency, use harmful mercury in and have problems in the life-span.
In recent years, the illumination of light emitting diode (LED:Light Emitted Diode) is used also to popularize.In patent document 1 grade, such as propose the lighting device of the alternative fluorescent lamp utilizing LED.
Prior art document
Patent document
Patent document 1: Japan Patent No. 4153870 publication.
Summary of the invention
The problem that invention will solve
The lighting device of the mode shown in patent document 1 uses LED as light source and can be installed on general fluorescent lamp utensil (lamp socket)., this lighting device is different from fluorescent lamp in the past, be noted that light diffusion characteristic is narrow, direct-view light source time the problem of to dazzle etc.In order to alleviate these problems, also consider that the emitting side in LED illumination arranges the countermeasure of diffusing panel, lens etc., can produce in the utilization of diffusing panel due to light scattering, reflect cause the utilization ratio of light to reduce other problem, in the utilization of lens owing to needing to arrange lens to each LED thus can produce cost raising other problem.
Namely problem of the present invention is, provides a kind of by using LED, thus except the advantage of LED, and dazzle when going back the good and direct-view of light diffusion characteristic few lighting device.
For solving the scheme of problem
The mode solving the lighting device of the present invention of above-mentioned problem possesses: light guide plate, makes to penetrate from the light of surface feeding sputtering from interarea; Multiple LED, is provided to described end face; Framework, accommodates described light guide plate and described multiple LED; And the power supply terminal of described multiple LED.
In described light guide plate, the length L(cm of the light conducting direction of light guide plate) and the width W (cm) orthogonal with the thickness direction of described light conducting direction and light guide plate of light guide plate be W/L >=10.
The quantity of described multiple LED is (W/L)/2() more than.
In lighting device, described power supply terminal is provided at least one end of the width at light guide plate in the end of described framework.
Lighting device of the present invention uses light guide plate to make the light diffusion penetrated from multiple LED.By using described light guide plate and multiple LED, thus seek the raising of optical diffuse, and suppress to dazzle.
The thickness of preferred described light guide plate is fixing, is particularly preferably 2mm ~ 30mm.In addition, interarea and the end face of preferred described light guide plate are minute surfaces, contain light diffusion material in inside, and the specific refractivity of the preferred refractive index of described light diffusion material and the matrix material of described light guide plate is more than 0.4.And then the volume average particle size of preferred light diffuse material is 0.5 ~ 5 μm, and its concentration is 0.0001 ~ 0.003 quality %.
And then lighting device of the present invention can be replaced straight tubular fluorescent lamp to use.
Invention effect
Because lighting device of the present invention is guide-lighting mode, so wide same with fluorescent lamp in the past of light diffusion characteristic, even if direct-view is also non-dazzing, and then similarly can use with fluorescent lamp in the past.
Accompanying drawing explanation
Fig. 1 is the general view of the example observing lighting device of the present invention from interarea side.
Fig. 2 A is the general view of another example observing lighting device of the present invention from interarea side.
Fig. 2 B is the general view of the another example observing lighting device of the present invention from interarea side.
Fig. 3 is the summary section after being cut off with the III-III face vertical and parallel with light conducting direction with its interarea by the lighting device of above-mentioned Fig. 2 A.
Fig. 4 is the skeleton diagram of the optical characteristics assay method representing the present invention and comparative example.
Fig. 5 is the figure of the optical characteristics representing the present invention and comparative example.
Detailed description of the invention
Below, according to Fig. 1, the present invention is described.Lighting device 1 of the present invention has: have the light guide plate 2 of scattering key element, multiple LED3, collecting light guide plate 2 and the framework 4 of multiple LED3, the power supply terminal 5 of multiple LED3 and supply unit 6.
With regard to light guide plate 2, use the light guide plate of tabular as an example in FIG.Light guide plate 2 is by thickness T(cm), the length L(cm of light conducting direction) and width W (cm) specify size.Length (light conducting direction) and the width (width) of thickness (thickness direction), light conducting direction are orthogonal.Further, although thickness T is not shown in FIG, shown in the Fig. 3 described later.
With two end faces parallel with width with light conducting direction forming light guide plate 2, two end faces in other words being formed by light conducting direction and width for interarea.In two interareas, to penetrate the interarea of the light after leaded light for emitting side interarea, be emitting side opposition side interarea with another.The interval of emitting side interarea and emitting side opposition side interarea is equivalent to thickness.In addition, width is orthogonal with light conducting direction and thickness direction.In other words, orthogonal with the face formed by light conducting direction and thickness direction.
Multiple LED3 is provided to the end face (end face formed by thickness direction and width) of light guide plate 2.By the end face of each LED3 of configuration also referred to as incident end face.
Power supply terminal 5 is provided to the end of the width at light guide plate 2 in multiple ends of framework 4, is connected with the supply unit 6 for powering to each LED3.Owing to supplying alternating current to power supply terminal 5, so utilize supply unit 6 to be transformed to direct current, adjust voltage as required, supply DC current to LED3.Further, Fig. 1 schematically shows lighting device 1, eliminate the connection etc. of power supply terminal 5 and supply unit 6 and each LED3.
The light of the incident end face of light guide plate 2 is imported to by being provided to the paper frontal injection of scattering key element from emitting side interarea towards Fig. 1 of light guide plate 2 from multiple LED3.
As above-mentioned scattering key element, can apply the white reflective point type (dot) being arranged on interarea print, be arranged on interarea surperficial micro concavo-convex, containing known various scattering key elements such as light diffusion materials, but as hereinafter described preferably containing light diffusion material.
In the light guide plate 2 used in the lighting device 1 becoming object of the present invention, the length L(cm of light conducting direction) and the width W (cm) orthogonal with the thickness direction of light conducting direction and light guide plate 2 of light guide plate 2 meet W/L >=10.In the past, sought to make the leaded light of light guide plate distance longer, always in the light guide plate of shape elongated as the present invention, light source was set at its short brink (limit of length L).When by LED centralized configuration when the narrow region of short brink, the problem causing the lifetime of LED from the thermal conductance of LED generation can be produced.In the present invention, be distributed LED by the long limit (limit of length W) at light guide plate 2, thus the problem of heat can be solved.
At this, when the thickness of light guide plate 2 is fixed, by cutting out from the resin substrate produced by extruding method for making, thus light guide plate 2 can be manufactured by qurer.And then the thickness of preferred light guide plate 2 is 2mm ~ 30mm.By being set to below 30mm, thus the weight of lighting device 1 can be controlled.Particularly when lighting device 1 of the present invention is installed on fluorescent lamp utensil, can not bear in weight fluorescent lamp utensil and too greatly use.
In addition, by the thickness of light guide plate 2 is set to more than 2mm, thus the light from LED can be imported expeditiously in light guide plate 2.
And then preferably in light guide plate 2, the interarea of light guide plate 2 and end face are minute surfaces, contain light diffusion material in inside.By adopting the light diffusion material making the inner main scattering key element containing light guide plate 2, thus print, can manufacture by qurer compared with situation that concave-convex surface is processed with arranging in addition.Usually, when using the light diffusion material of even diffusion as scattering key element, easily create a difference in the brightness of the interarea of light guide plate 2 near light source and from the position that light source leaves, but due to guide-lighting apart from short in the present invention, so obvious hardly.
And then the specific refractivity of the matrix material of the refractive index of preferred light diffuse material and light guide plate 2 is more than 0.4.If such light diffusion material, then can in light guide plate 2, light be reflected more strongly.Consequently can increase the light quantity penetrated to the direction vertical with the interarea of light guide plate 2.Therefore, the feature that light diffusion sheet material also can not be set at the emitting side of light guide plate 2 is in addition had.
And then the volume average particle size of preferred light diffuse material is 0.5 ~ 5 μm, its concentration is 0.0001 ~ 0.003 quality %.When the volume average particle size of light diffusion material is less than 0.5 μm, the position left near the incident end face of light guide plate 2 and from bottom creates a difference in color sometimes.When the volume average particle size of light diffusion material is greater than 5 μm, contained large particle is had to become the possibility of bright spot damage outward appearance when lighting.And, there is the possibility of the manufacturing installation of damage light guide plate 2.Further, volume average particle size is asked for by laser diffraction and scattering method in the present invention.
When the concentration ratio 0.0001 quality % of light diffusion material is few, there is the possibility that the light in light guide plate 2 fully can not be penetrated to interarea direction.In addition, when larger than 0.003 quality %, the neighbouring bright possibility of only light source is had.
The matrix material of light guide plate 2 of the present invention can use transparent resin, such as acrylic resin, styrene resin, polycarbonate resin etc.In transparent, particularly preferably acrylic resin, wherein preferred polymethyl methacrylate (polymethylmethacrylate).
As light diffusion material, preferably use the inorganic compound particles large to the refringence of matrix material resin, such as titanium oxide, zinc oxide etc.
When obtaining identical light quantity, in order to the heat produced at each LED3 that leaves expeditiously, the quantity of preferred LED is many.Therefore as shown in Fig. 2 A, 2B, be also equipped with light source at one with incident end face end face in opposite directions also can.Now, the multiple LED3 being provided to end face in opposite directions as Fig. 2 A toward each other also can, the multiple LED3 being provided to end face in opposite directions as Fig. 2 B also can not toward each other.
On the other hand, the quantity that there is LED is more, the problem that the assembling of LED unit is more numerous and diverse.And the improvement effect of the efficiency of the heat produced at multiple LED3 that leaves also becomes not remarkable.Therefore, be not that how all right the quantity of LED is, preferably the incident end face of every side to be W/L × 20(to width W be multiplied by divided by the value of the length L of light conducting direction 20 quantity) individual below.When considering manufacturing cost, the quantity of preferred LED is few.When the heat dispersion of LED improves, the quantity of LED can be made to tail off.
In addition, owing to can be produced the not enough problem of heat radiation when forming lighting device with the LED element of peanut, so need the element of the number be distributed to a certain degree.The total number being preferably configured in the LED of the one or both sides of light guide plate is more than W/L/2.When fewer than W/L/2, LED becomes sparse, estimates that brightness can produce irregular in the face of light guide plate.
The emitting side opposition side interarea that the heat sink of the heat produced at multiple LED3 that leaves is arranged on light guide plate 2 also can.Or, as shown in Figure 3, for multiple LED3, heat sink 7 is set in the side of the opposition side with light guide plate 2 and also can.Fig. 3 is the III-III profile of Fig. 2 A, except the structure example of Fig. 2 A, also show the example arranging heat sink 7 between framework 4 and each LED3.Fig. 3 illustrates the example arranging heat sink 7, is not limited in this.Such as, to framework 4 self use there is heat sinking function material also can, also can at the arranged outside heat sink 7 of framework 4.
And then the configuration of framework 4 and light guide plate 2 is not limited to Fig. 3.Such as, framework 4 and emitting side opposition side interarea 22 bond and also can.
The multiple LED3 being configured at light guide plate 2 use also can the LED module that multiple LED is arranged on substrate.When multiple LED3 is configured at light guide plate 2, although assembling become numerous and diverse, by arrange at substrate electric power supply wiring, thus can alleviate assemble become numerous and diverse problem.In this case, the function of supply unit 6 can be realized in LED module.
In figure 3, the downside of light guide plate 2 is expressed as emitting side interarea 21, upside is expressed as emitting side opposition side interarea 22.Emitting side interarea 21 and emitting side opposition side interarea 22 separate thickness T(cm at thickness direction) interval.
The light inciding incident end face from each LED3 penetrates from emitting side interarea 21.Therefore, be equipped with reflection key element at the width end face (becoming 1 pair of end face of the side of light guide plate 2, the end face of two short brinks) of light guide plate 2 and emitting side opposition side interarea 22 also can.As reflection key element, can be arranged by the coating etc. of the reflectivity band of the metal evaporations such as Al, aluminium strip (aluminium tape) or white band etc., reflective white coating.
In addition, at least one end of the width at light guide plate 2 is not hindered to be equipped with LED yet.
In addition, although in the above-described embodiment, as an example of light guide plate 2, use the light guide plate of tabular to be illustrated, be not limited only to this.Such as, also can be the shape of polygonal column., when considering the utilization ratio of light, be preferably tabular.
As described above, according to the present invention, lighting device as follows can be provided: by using LED and above-mentioned light guide plate in lighting device, thus except the advantage of LED, such as, energy efficiency is high, also do not use outside poisonous mercury and then life-span long advantage, dazzles few when going back the good and direct-view of light diffusion characteristic.
Embodiment
< embodiment >
Use common extrusion moulding machine, the acrylic resin ((strain) Kuraray PARAPET) of the Titanium particles of the volume average particle size 1 μm containing 0.002 quality % is manufactured light guide plate substrate with thickness 5mm.
Above-mentioned light guide plate substrate cutting is become the guide-lighting length of the length L(of light conducting direction): 100mm, width W: 1500mm, to the end face on 4 limits (incident end face, with incident end face end face in opposite directions and two sides, in other words the face beyond two interareas) implement attrition process, be made light guide plate.
Next, at the white reflection film (Furukawa electrical industry (strain) MC-PET processed) of overlapping almost identical with the interarea of the light guide plate shape of the emitting side opposition side interarea of the light guide plate obtained.And then, paste reflection aluminium strip at 1 pair of end face (two short brinks) of the side becoming light guide plate.
In addition, the White LED of 75 0.3W is configured on Glass-Epoxy substrate with 20mm spacing, this LED unit is fixed on aluminum groove (channel), make the LED module of 1500mm length.2 these modules are made.
Afterwards, there are two of the light guide plate of reflecting plate long limits configure this LED module and be embedded in framework in overlap.At the minor face two ends of framework, as the power supply terminal being embedded in fluorescent lamp utensil lamp socket, male projection pin is installed, forms AC power supplies circuit, be connected with LED supply unit (AC/DC adapter (adapter)).The alternating current imported from power supply terminal is transformed to DC current and supplies to each LED by supply unit.
At this, the width W of light guide plate is 1500mm, and length L is 100mm, W/L/2 is 1500/100/2=7.5.The quantity of the LED used is 150(75 × 2) individual, meet more than W/L/2.
< comparative example 1>
As the fluorescent lamp of type in the past, use 1 40W white straight pipe type fluorescent lamp.
< comparative example 2>
As fluorescent-lamp-type led lighting device, use Japanese Advantage Co., Ltd. system " 40W1 row CLEAR " type.(138 LED 9mm spacing)
< evaluates >
As shown in Figure 4, install white reflective plate 104 at metope 102, the lighting device of the lighting device or comparative example that arrange embodiment in its observation side is used as light source 101.At metope 103 so that illumination photometer 105 can be provided with in the mode that above-below direction is movable.In addition, black flannelette (flannel) 106 is provided with.Point bright light source 101, frontal be determined at respectively have left as the position of the 3000mm measuring distance front and on the illumination in direction.At this, to measure height 0mm for front.
For this measurement result chart be normalized for benchmark with the illumination in front shown in Figure 5.Specifically, in Figure 5, respectively for embodiment and comparative example, the illumination in front is expressed as a reference value, by up to illumination be expressed as normalization illumination (%) relative to the ratio of a reference value.
As shown in Figure 5, lighting device of the present invention shows the diffusive property almost superior on an equal basis with fluorescent lamp.On the other hand, the fluorescent-lamp-type led diffusive property of comparative example 2 is very narrow.In addition when looking at light supply apparatus straight, the fluorescent-lamp-type led meeting of comparative example 2 is dazzled, but lighting device of the present invention is non-dazzing.
Further, the present invention is not limited only to above-mentioned embodiment, can suitably change in the scope not departing from purport.
This application claims the priority based on No. 2009-254574, the Japanese publication Patent of application on November 6th, 2009, quote its whole disclosure at this.
The explanation of Reference numeral
1 lighting device;
2 light guide plates;
21 emitting side interareas;
22 emitting side opposition side interareas;
3 LED；
4 frameworks;
5 power supply terminals;
6 supply units;
7 heat sinks;
101 light sources;
102,103 metopes;
104 white reflective plate;
105 illumination photometers;
106 black flannelettes.
Claims (5)
1. a lighting device, wherein, possesses:
Light guide plate, makes to penetrate from the light of surface feeding sputtering from interarea;
Multiple LED, is provided to described end face;
Framework, accommodates described light guide plate and described multiple LED; And
The power supply terminal of described multiple LED,
In described light guide plate, the length L(cm of light conducting direction) and the width W (cm) orthogonal with the thickness direction of described light conducting direction and light guide plate of light guide plate be W/L >=10, contain light diffusion material in inside,
The quantity of described multiple LED is (W/L)/2() more than,
Described power supply terminal is provided at least one end of the width at described light guide plate in the end of described framework,
Described end face is the face formed by the thickness direction of described light guide plate and width, and described interarea is the face formed by the light conducting direction of described light guide plate and width,
The specific refractivity of the refractive index of described light diffusion material and the matrix material of described light guide plate is more than 0.4,
The volume average particle size of described light diffusion material is 0.5 ~ 5 μm, and its concentration is 0.0001 ~ 0.003wt%.
2. lighting device according to claim 1, is characterized in that, the thickness of described light guide plate is fixing.
3. lighting device according to claim 1 and 2, is characterized in that, the thickness of described light guide plate is 2mm ~ 30mm.
4. lighting device according to claim 1 and 2, is characterized in that, the interarea of described light guide plate and end face are minute surfaces.
5. lighting device according to claim 1 and 2, is characterized in that, can replace straight tubular fluorescent lamp to use.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-254574 | 2009-11-06 | ||
| JP2009254574 | 2009-11-06 | ||
| PCT/JP2010/006446 WO2011055527A1 (en) | 2009-11-06 | 2010-11-01 | Lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102667308A CN102667308A (en) | 2012-09-12 |
| CN102667308B true CN102667308B (en) | 2015-05-13 |
Family
ID=43969770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080050032.2A Expired - Fee Related CN102667308B (en) | 2009-11-06 | 2010-11-01 | Lighting device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5507577B2 (en) |
| KR (1) | KR20120102614A (en) |
| CN (1) | CN102667308B (en) |
| WO (1) | WO2011055527A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102305599B1 (en) | 2014-10-22 | 2021-09-28 | 엘지이노텍 주식회사 | Light unit and Lamp unit for automobile of using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392981Y (en) * | 1999-10-28 | 2000-08-23 | 宋义 | Uniform efficient front light-source |
| CN1900578A (en) * | 2006-07-21 | 2007-01-24 | 周岳泉 | Night reading instrument |
| CN201032081Y (en) * | 2007-04-09 | 2008-03-05 | 台湾奈普光电科技股份有限公司 | Backlight module |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9918821D0 (en) * | 1999-08-11 | 1999-10-13 | Signwaves Limited | Edgelit display panel assembly |
| DE20018905U1 (en) * | 2000-11-06 | 2001-03-01 | Lite On Electronics Inc | Luminescent diodes (LED) - vehicle signal light |
| JP2005228536A (en) * | 2004-02-12 | 2005-08-25 | Santo Kagaku:Kk | Light guide material |
| JP2006294343A (en) * | 2005-04-07 | 2006-10-26 | Mitsubishi Rayon Co Ltd | Planar led light source device |
| JP2008120210A (en) * | 2006-11-10 | 2008-05-29 | Inoac Corp | Lighting equipment |
| JP2008288183A (en) * | 2007-04-18 | 2008-11-27 | Ksk:Kk | Lighting fixture |
| JP2009199820A (en) * | 2008-02-20 | 2009-09-03 | Kanehirodenshi Corp | Led lamp |
| JP5066462B2 (en) * | 2008-02-29 | 2012-11-07 | スタンレー電気株式会社 | Vehicle lighting |
| JP2009259557A (en) * | 2008-04-16 | 2009-11-05 | Toyoda Gosei Co Ltd | Linear light emitting device |
| CN201302065Y (en) * | 2008-11-28 | 2009-09-02 | 常州丰盛光电科技股份有限公司 | LED fluorescent lamp |
-
2010
- 2010-11-01 JP JP2011539283A patent/JP5507577B2/en active Active
- 2010-11-01 KR KR1020127010970A patent/KR20120102614A/en not_active Application Discontinuation
- 2010-11-01 WO PCT/JP2010/006446 patent/WO2011055527A1/en active Application Filing
- 2010-11-01 CN CN201080050032.2A patent/CN102667308B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392981Y (en) * | 1999-10-28 | 2000-08-23 | 宋义 | Uniform efficient front light-source |
| CN1900578A (en) * | 2006-07-21 | 2007-01-24 | 周岳泉 | Night reading instrument |
| CN201032081Y (en) * | 2007-04-09 | 2008-03-05 | 台湾奈普光电科技股份有限公司 | Backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120102614A (en) | 2012-09-18 |
| JPWO2011055527A1 (en) | 2013-03-21 |
| WO2011055527A1 (en) | 2011-05-12 |
| JP5507577B2 (en) | 2014-05-28 |
| CN102667308A (en) | 2012-09-12 |
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