WO2014163321A1 - Unité d'éclairage à del pour tableau d'affichage électronique - Google Patents

Unité d'éclairage à del pour tableau d'affichage électronique Download PDF

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Publication number
WO2014163321A1
WO2014163321A1 PCT/KR2014/002549 KR2014002549W WO2014163321A1 WO 2014163321 A1 WO2014163321 A1 WO 2014163321A1 KR 2014002549 W KR2014002549 W KR 2014002549W WO 2014163321 A1 WO2014163321 A1 WO 2014163321A1
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WO
WIPO (PCT)
Prior art keywords
light emitting
led lighting
light
lighting unit
emitting array
Prior art date
Application number
PCT/KR2014/002549
Other languages
English (en)
Korean (ko)
Inventor
한태용
신선웅
강민
Original Assignee
서울반도체 주식회사
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 서울반도체 주식회사 filed Critical 서울반도체 주식회사
Publication of WO2014163321A1 publication Critical patent/WO2014163321A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/03—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator rechargeable by exposure to light
    • F21S9/032—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator rechargeable by exposure to light the solar unit being separate from the lighting unit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/02—Signs, boards, or panels, illuminated by artificial light sources positioned in front of the insignia
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
    • G09F27/007—Displays with power supply provided by solar cells or photocells
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/40—Light sources with three-dimensionally disposed light-generating elements on the sides of polyhedrons, e.g. cubes or pyramids
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs

Definitions

  • the present invention relates to an LED lighting unit for an electric signboard, and more particularly to an LED lighting unit for an electric signboard that can improve light efficiency and provide uniform light.
  • the electronic signboard is used as a means of transmitting text and images to an unspecified number.
  • the display board is used in various places as a guide function or an advertisement function.
  • billboards used in outdoor advertising are billboards, Panaplex, Trivision, etc., and large LED billboards have been used in recent years.
  • the LED display board is disposed in the entire rear surface of the display surface according to the position of the light source for providing light to provide a light to the entire display surface, and the light in the screen direction from the upper, lower or side of the front surface of the display surface. It can be divided into the front lighting method to provide.
  • the front lighting method has an advantage of providing light at a low cost with a smaller number of LED lighting units for electronic display boards than the rear lighting method.
  • the LED lighting unit for the front panel illumination method is provided at the edge of the display surface to provide light, it is difficult to provide uniform luminance over the entire front surface of the display surface. That is, the general LED lighting panel of the front lighting method has a problem in that the display quality is deteriorated because it provides non-uniform brightness according to the distance between the LED lighting unit for the display panel and the front surface of the display surface.
  • the problem to be solved by the present invention is to control the brightness of the plurality of light emitting arrays that provide light according to the distance between the LED lighting unit for the display panel from the front surface of the display surface, thereby the LED lighting unit for the display panel and the display surface
  • the luminance difference due to the distance difference of each region may be compensated for.
  • the LED lighting unit for an electronic display panel of the present invention has an advantage of improving display quality and light efficiency by providing uniform luminance over the entire area of the front surface of the display surface.
  • An LED lighting unit for an electronic display panel positioned at an edge of a front surface of a display surface to provide light comprising: a plurality of light emitting arrays providing light to a plurality of areas of the display surface; And a support part supporting the light emitting arrays, wherein the light emitted from the light emitting arrays has different luminance from each other in the plurality of regions of the display surface. Therefore, it is possible to realize uniform luminance over the entire area of the front surface of the display surface and to improve light efficiency.
  • the support portion includes at least two inclined surfaces on one surface, and the light emitting arrays are separately located on the inclined surfaces.
  • the support further includes a heat sink on the other side.
  • the support portion includes first and second inclined surfaces that are symmetrical to each other on one surface.
  • the light emitting arrays include a first light emitting array located on the first inclined plane and a second light emitting array located on the second inclined plane.
  • the display surface is divided into first and second regions, the first light emitting array provides light to the first area, the second light emitting array provides light to the second area, and the first light emission.
  • the brightness of the second light emitting array is higher than the brightness of the array.
  • the first and second light emitting arrays are located closer to the first region than to the second region.
  • the first and second light emitting arrays may be driven by the same driving voltage or driving current, and further include a luminance reducing film covering the first light emitting array on the first inclined surface.
  • the first and second light emitting arrays are driven by the same driving voltage or driving current, and the number of the second light emitting diodes is greater than the number of the first light emitting diodes.
  • first driver for driving the first light emitting array and a second driver for driving the second light emitting array, wherein the driving voltage or driving current of the second driving part is the driving voltage or driving current of the first driving part.
  • the support portion has a center surface on one surface and first and second inclined surfaces that are symmetrical with respect to the center surface,
  • the center plane corresponds to the longitudinal direction of the support part horizontally with one surface of the support part.
  • the light emitting arrays may include: a first light emitting array positioned on the first inclined surface; A second light emitting array located on the center plane; And a third light emitting array positioned on the second inclined surface.
  • the display surface is divided into first to third regions, the first light emitting array provides light to the first area, the second light emitting array provides light to the second area, and the third light emission.
  • the array provides light to a third region, and has a higher luminance from the first light emitting array to the third light emitting array.
  • the first to third light emitting arrays are located closer to the first region than to the third region.
  • the solar cell may further include a solar cell configured to provide a power supply voltage for driving the first and second light emitting arrays.
  • the LED lighting unit for the LED display according to the present invention individually controls the driving signals of the plurality of light emitting arrays, thereby compensating the luminance difference for each region due to the distance difference between the LED lighting unit for the LED display and the display surface. can do.
  • the LED lighting unit for an electronic display panel of the present invention has an advantage of improving display quality and light efficiency by providing uniform luminance over the entire area of the front surface of the display surface.
  • the LED lighting unit for the electronic display panel of the present invention is provided with a luminance reducing film on at least one of the plurality of light emitting array, the luminance difference for each region due to the difference in distance between the LED lighting unit for the electronic display panel and the display surface To compensate.
  • the LED lighting unit for the LED board has an advantage of simplifying a driving circuit since the luminance difference for each region is compensated by the distance difference between the LED lighting unit for the LED board and the display surface by the luminance reducing film.
  • the LED lighting unit for the display panel of the present invention by adjusting the number of light emitting diodes of at least one light emitting array of the plurality of light emitting array area by the distance difference between the LED lighting unit for the display panel and the display surface Compensation for the star brightness can be compensated.
  • the LED lighting unit for the display panel of the present invention is provided with a solar cell for supplying a power voltage and a mobile unit for moving in the horizontal direction of the display surface, so that wiring from a power source for separate driving is provided. It is unnecessary and has the advantage of being able to easily control the amount of light in the horizontal direction of the display surface.
  • FIG. 1 is a cross-sectional view of a signboard including an LED lighting unit for a signboard according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view illustrating the LED lighting unit for the electronic display board of FIG. 1.
  • FIG. 3 is a diagram illustrating a path of light provided on the display surface of FIG. 1.
  • FIG. 4 is a view schematically showing an LED lighting unit for an electronic sign of FIG. 1.
  • FIG. 5 is a perspective view illustrating an LED lighting unit for an electric sign board according to a second embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a path of light provided on the display surface of FIG. 5.
  • FIG. 7 is a cross-sectional view of an LED lighting unit for an electric sign board according to a third embodiment of the present invention.
  • FIG. 8 is a cross-sectional view of an LED lighting unit for an electric sign board according to a fourth exemplary embodiment of the present invention.
  • FIG. 9 is a cross-sectional view of an LED lighting unit for a signboard according to a fifth exemplary embodiment of the present invention.
  • FIG. 1 is a cross-sectional view of a signboard including an LED lighting unit for a signboard according to a first embodiment of the present invention
  • FIG. 2 is a perspective view showing the LED lighting unit for a signboard of FIG. 1.
  • the electronic display panel 100 includes a display surface 110, an LED lighting unit 150 for an electronic display panel, and an LED lighting for the electronic display panel 110 on the display surface 110. It includes a connecting portion 115 for coupling the unit 150.
  • the LED lighting unit 150 for the afterglow plate has been described as being limited to an upper portion of the front surface of the display surface 110, the present invention is not limited thereto.
  • An edge such as a lower portion, a side portion, or a corner of the display surface 110 is described. It can be installed in a variety of locations, including.
  • the LED lighting unit 150 for the signboard includes first and second light emitting arrays 156 and 157 and a support part 151.
  • the support part 151 includes first and second inclined surfaces 152 and 153 located on one surface and a heat sink 159 located on the other surface.
  • the support part 151 is made of a material having excellent thermal conductivity.
  • the first and second inclined surfaces 152 and 153 may be symmetrical with each other. That is, the first and second inclined surfaces 152 and 153 are symmetrical with each other along the longitudinal direction of the support part 151 and have a prism shape where one side meets.
  • the first and second inclined surfaces 152 and 153 may be integrally formed with the support 151 or a separate structure separated from the support 151 may be coupled to the support 151.
  • the heat sink 159 is located on the other surface of the support part 151 and has a plurality of protruding structures.
  • the heat sink 159 having a plurality of projecting structures is limited and described.
  • the present invention is not limited thereto, and other configurations having a heat dissipation effect may also be applied.
  • the first light emitting array 156 is positioned on the first inclined surface 152.
  • the first light emitting array 156 may include a lens that is spaced apart at regular intervals along the longitudinal direction of the first inclined surface 152 and that extends an irradiation angle or a lens that refracts light in a desired direction.
  • the second light emitting array 157 is positioned on the second inclined surface 153.
  • the second light emitting array 157 may include a lens that is spaced apart at regular intervals along the length direction of the second inclined surface 153, and which extends an irradiation angle or refracts light in a desired direction.
  • the first and second light emitting arrays 156 and 157 provide light to different areas on the front surface of the display surface 110 and have different luminance. To this end, the first and second light emitting arrays 156 and 157 are driven by different driving signals (driving voltage or driving current).
  • FIG. 3 is a diagram illustrating a path of light provided on the display surface of FIG. 1
  • FIG. 4 is a diagram schematically illustrating an LED lighting unit for an electronic display panel of FIG. 1.
  • the display surface 110 may be divided into first and second regions FA and SA in the vertical direction of the front surface.
  • the LED lighting unit 150 for the display board is positioned adjacent to the upper end of the front surface of the display surface (110).
  • the LED lighting unit 150 for the display board is located adjacent to the first area FA. That is, the LED lighting unit 150 for the signboard is located closer to the first area FA than the second area SA.
  • the LED lighting unit 150 for the display board includes the first and second light emitting arrays 156 and 157, the first and second driving units 103 and 105, and the controller 101.
  • the first light emitting array 156 is driven by the first driver 103, and the second light emitting array 157 is driven by the second driver 105. That is, the first and second light emitting arrays 156 and 157 may be driven separately.
  • the first and second drivers 103 and 105 provide different driving signals (driving voltage or driving current) to the first and second light emitting arrays 156 and 157 according to control signals of the controller 101. .
  • the LED lighting unit 150 for the electronic display panel and the first and second regions FA and SA are used. The luminance difference according to the distance of) can be compensated for.
  • the brightness of the first and second light emitting arrays 156 and 157 is adjusted according to the distance difference between the first and second regions FA and SA of the LED lighting unit 150.
  • the first light emitting array 156 has a first brightness S1
  • the second light emitting array 157 has a second brightness S2 higher than the first brightness S1.
  • the present invention compensates the luminance difference for each region due to the distance difference between the LED lighting unit 150 for the display board 110 and the display surface 110 by individually controlling the driving signals of the first and second light emitting arrays 156 and 157. can do.
  • the LED lighting unit 150 for the electronic display panel of the present invention has an advantage of improving display quality and light efficiency by providing uniform luminance to the entire front surface area of the display surface 110.
  • FIG. 5 is a perspective view illustrating an LED lighting unit for an electronic display panel according to a second embodiment of the present invention
  • FIG. 6 is a view illustrating a path of light provided on the display surface of FIG. 5.
  • the LED lighting unit 250 includes a support part 251 and first to third light emitting arrays 256, 257, and 258. .
  • the support part 251 includes a center surface 253 located on one surface, first and second inclined surfaces 252 and 254, and a heat sink 259 located on the other surface.
  • the support part 251 is made of a material having excellent thermal conductivity.
  • the center plane 253 corresponds to the longitudinal direction of the support part 251 horizontally with one surface of the support part 251.
  • the first and second inclined surfaces 252 and 254 may be symmetrical with each other with the center surface 253 interposed therebetween.
  • the center surface 253 and the first and second inclined surfaces 252 and 254 may be integrally formed with the support part 251 or a separate structure separated from the support part 251 may be coupled to the support part 251. have.
  • the heat sink 259 is positioned on the other surface of the support part 251 and has a plurality of protruding structures.
  • the heat sinks 259 having a plurality of projecting structures are limited and described.
  • the present invention is not limited thereto, and other configurations having a heat dissipation effect may also be applied.
  • the first light emitting array 256 is positioned on the first inclined surface 252.
  • the first light emitting array 256 may include a lens that is spaced apart at regular intervals along the length direction of the first inclined surface 252, and which extends an irradiation angle or refracts light in a desired direction.
  • the second light emitting array 257 is positioned on the center plane 253.
  • the second light emitting array 257 may be spaced apart at regular intervals along the longitudinal direction of the center plane 253, and may include a lens for refracting light in a desired direction or a lens for widening an irradiation angle.
  • the third light emitting array 258 is positioned on the second inclined surface 254.
  • the third light emitting array 258 may include a lens that is spaced apart at regular intervals along the longitudinal direction of the second inclined surface 254, and that extends an irradiation angle or a lens that refracts light in a desired direction.
  • the first to third light emitting arrays 256, 257, and 258 provide light to different areas on the front surface of the display surface 110 and have different luminance. To this end, the first to third light emitting arrays 256, 257, and 258 are driven by different driving voltages or driving currents.
  • the display surface 110 may be divided into first to third regions FA, SA, and TA in the vertical direction of the front surface.
  • the LED lighting unit 250 for the display board is positioned adjacent to the upper end of the front surface of the display surface (110).
  • the LED lighting unit 250 for the display board is located adjacent to the first area FA. That is, the LED lighting unit 250 for the signboard is located closer to the first area FA from the third area TA.
  • the luminance of the first to third light emitting arrays 256, 257, and 258 is adjusted according to the distance difference between the first to third areas FA, SA, and TA in the LED lighting unit 250.
  • the first light emitting array 256 has a first brightness S1
  • the second light emitting array 257 has a second brightness S2 that is higher than the first brightness S1
  • the third light emitting array 258 has a third luminance S3 that is higher than the second luminance S2.
  • the luminance for each region is determined by the distance difference between the LED lighting unit 250 and the display surface 110. You can compensate the car.
  • the LED lighting unit 250 for the electronic display panel of the present invention has an advantage of improving display quality and light efficiency by providing uniform luminance over the entire area of the front surface of the display surface 110.
  • FIG. 7 is a cross-sectional view of an LED lighting unit for an electric sign board according to a third embodiment of the present invention.
  • the LED lighting unit 350 according to the third embodiment of the present invention has a configuration except for the luminance reduction film 355 covering the first light emitting array 356. Since the LED lighting unit (150 of FIG. 2) according to the first embodiment of the present invention is the same, a detailed description thereof will be omitted.
  • the LED lighting unit 350 for the display board includes first and second inclined surfaces 352 and 353 which are symmetrical to each other on one surface of the support 351, and a first light emitting array 356 positioned on the first inclined surface 352. ) And a second light emitting array 357 positioned on the second inclined surface 353.
  • the first and second light emitting arrays 356 and 357 have the same luminance by driving signals (driving voltage or driving current) having the same level.
  • the luminance reducing film 355 is positioned on the first inclined surface 352 to reduce the luminance of the first light emitting array 356.
  • the luminance reducing film 355 has a function of reducing the amount of light emitted by total reflection and absorption of a portion of the light generated from the first light emitting array 356.
  • the LED lighting unit 350 is the first light emitting array positioned at the shortest distance between the LED roughening unit 350 and the display surface according to the area difference of the display surface.
  • the luminance reducing film 355 may be provided to reduce the luminance of the display unit 356 to compensate for the luminance difference for each region due to the distance difference between the LED lighting unit 350 and the display surface.
  • the LED lighting unit 350 of the present invention has an advantage of improving display quality and light efficiency by providing uniform luminance to the entire front surface area of the display surface.
  • the LED lighting unit 350 for the display board compensates for the luminance difference for each region due to the distance difference between the LED lighting unit 350 for the display board and the display surface using only the brightness reduction film 355, the first embodiment of the present invention is implemented.
  • Example of the LED lighting unit for the display board (150 of FIG. 2) has the advantage that can simplify the drive circuit.
  • FIG. 8 is a cross-sectional view of an LED lighting unit for an electric sign board according to a fourth exemplary embodiment of the present invention.
  • the LED lighting unit 550 may include first and second inclined surfaces 552 and 553 which are symmetrical to each other, and are disposed on the first inclined surface 552.
  • a first light emitting array 556 and a second light emitting array 557 positioned on the second inclined surface 553.
  • the first and second light emitting arrays 556 and 557 may be driven by the same driving signal (driving voltage or driving current).
  • the second light emitting array 557 includes a greater number of light emitting diodes than the first light emitting array 556.
  • the first light emitting array 556 provides light to a first area defined as an upper front side of a display surface
  • the second light emitting array 557 provides light to a second area defined as a lower front surface of the display surface. to provide.
  • the second area has a distance farther from the LED lighting unit for the electronic display board than the first area.
  • the LED lighting unit 550 for the display panel provides light to the second region according to the distance difference between the first and second regions of the display surface and the LED lighting unit for the display panel.
  • the second light emitting array 557 having a larger number of light emitting diodes than the light emitting array 556, the luminance difference for each region due to the distance difference between the LED lighting unit 550 for the display board and the display surface can be compensated for.
  • the LED lighting unit 550 for the electronic display of the present invention has an advantage of improving display quality and light efficiency by providing uniform luminance to the entire front surface area of the display surface.
  • the LED lighting unit 550 for the display panel compensates for the luminance difference for each region due to the distance between the LED lighting unit 550 for the display panel and the display surface by adjusting the number of light emitting diodes of the second light emitting array 557. Therefore, there is an advantage that the driving circuit can be simplified than the LED lighting unit (150 of FIG. 2) of the first embodiment of the present invention.
  • FIG. 9 is a cross-sectional view of an LED lighting unit for a signboard according to a fifth exemplary embodiment of the present invention.
  • the LED lighting unit 650 for the LED panel according to the fifth embodiment of the present invention has a configuration except for the solar cell 690 and the mobile unit 670 for providing a power supply voltage. Since it is the same as the LED lighting unit 150 of FIG. 2 according to the first embodiment of the present invention, a detailed description thereof will be omitted.
  • the solar cell 690 is installed in each of the LED lighting units 650 for the display board.
  • the present invention is not limited thereto, and the number of the solar cells 690 may be changed.
  • the moving unit 670 moves the LED lighting unit 650 for the electronic display board in the horizontal direction on the front surface of the display surface.
  • the mobile unit 670 may be used to adjust luminance in a horizontal direction on the front surface of the display surface 110.
  • the moving unit 670 moves the LED lighting unit 650 for the electronic display panel located on the left side of the display surface 110 to the right side so that light is concentrated on the right side of the display surface 110.
  • the amount of light in the horizontal direction can be controlled.
  • the LED lighting unit 650 for the display board according to the fifth embodiment of the present invention is driven by receiving a power supply voltage through the solar cell 690, wiring from a power supply for separate driving is unnecessary.
  • the LED lighting unit 350 for the display board according to the fifth embodiment is further provided with a moving unit 670 has an advantage that can easily control the amount of light in the horizontal direction of the display surface 110.
  • the LED lighting unit for LED display according to the first to the fifth embodiment is not limited to the configuration, and may further include an outer case for protection from the outside.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

La présente invention concerne une unité d'éclairage à DEL pour une unité d'affichage électronique qui peut fournir une lumière uniforme avec une efficacité lumineuse améliorée. Une unité d'éclairage à DEL agencée dans les bords de la face d'un écran d'affichage selon la présente invention comprend une pluralité de réseaux électroluminescents permettant de fournir une lumière à une pluralité de régions de l'écran d'affichage, et une partie support permettant de soutenir les réseaux électroluminescents, les réseaux électroluminescents possédant des luminosités différentes les unes des autres en fonction de la pluralité de régions de l'écran d'affichage. Ainsi, la présente invention concerne une luminosité uniforme sur toutes les régions de l'écran d'affichage, ce qui améliore la qualité d'affichage et l'efficacité lumineuse.
PCT/KR2014/002549 2013-04-02 2014-03-26 Unité d'éclairage à del pour tableau d'affichage électronique WO2014163321A1 (fr)

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KR1020130035843A KR20140120129A (ko) 2013-04-02 2013-04-02 전광판용 엘이디 조명 유닛
KR10-2013-0035843 2013-04-02

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KR100865478B1 (ko) * 2008-02-25 2008-10-28 (주)파트라 Ｌｅｄ를 이용한 가로등
KR100971611B1 (ko) * 2010-01-21 2010-07-20 (주)리얼에너지 도로 조명등
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CN108616699A (zh) * 2018-04-25 2018-10-02 努比亚技术有限公司 拍照补光方法、设备及计算机存储介质

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