WO2013037288A1 - Structure de guidage de lumière de type direct, plaque de guidage de lumière de type direct et dispositif électroluminescent - Google Patents

Structure de guidage de lumière de type direct, plaque de guidage de lumière de type direct et dispositif électroluminescent Download PDF

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Publication number
WO2013037288A1
WO2013037288A1 PCT/CN2012/081260 CN2012081260W WO2013037288A1 WO 2013037288 A1 WO2013037288 A1 WO 2013037288A1 CN 2012081260 W CN2012081260 W CN 2012081260W WO 2013037288 A1 WO2013037288 A1 WO 2013037288A1
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WIPO (PCT)
Prior art keywords
light
direct
guiding structure
circuit board
transmitting body
Prior art date
Application number
PCT/CN2012/081260
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English (en)
Chinese (zh)
Inventor
高智伟
侯维新
应文逡
高启仁
Original Assignee
敦网光电股份有限公司
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
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Priority claimed from CN 201110271826 external-priority patent/CN102411166B/zh
Application filed by 敦网光电股份有限公司 filed Critical 敦网光电股份有限公司
Publication of WO2013037288A1 publication Critical patent/WO2013037288A1/fr

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    • 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
    • G02B6/0045—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 by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped 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
    • G02B6/0013—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
    • G02B6/002—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 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—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 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • 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]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the invention relates to a direct light guiding structure, a direct light guiding plate and a light emitting device, in particular to a direct light guiding structure and a direct light guiding plate capable of uniform light intensity, and an application of the direct type Light guiding structure or light emitting device of the direct light guiding plate.
  • the Current flat lighting device Device gradually adopts a plurality of light-emitting diodes as a light source to replace the conventional white heat lamp or fluorescent tube.
  • the light-emitting diodes are usually disposed directly at the bottom of the planar light-emitting device.
  • the light emitting diodes emit light, and the intensity of the light is strongest in the direction of the positive viewing angle (that is, the direction of the light emitting surface of the vertical light emitting diode). Therefore, the light output from the planar light-emitting device is not uniform, and a local dark spot (the region where the light intensity is the weakest) or a local bright spot (the region where the light intensity is the strongest) can be observed.
  • a light diffusing plate may be disposed in front of the light emitting diodes and kept at a distance from the light emitting diodes.
  • this improvement will increase the overall thickness of the planar light-emitting device.
  • Another way to improve local dark spots or bright spots is to increase the number of light-emitting diodes.
  • this improvement will increase the manufacturing cost of the planar light-emitting device.
  • the main object of the present invention is to provide a direct light guiding structure, a direct light guiding plate and a light emitting device, wherein the direct light guiding structure or the direct light guiding plate can receive light and then uniformly output light;
  • the direct light guiding structure or the direct light guiding plate can be applied.
  • the direct light guiding structure disclosed in the present invention comprises a light transmitting body and a plurality of microstructures; wherein the light transmitting body comprises an upper surface, a lower surface, an upper tapered groove and a lower receiving groove, The tapered groove is formed on the upper surface, and the lower receiving groove is formed on the lower surface, and the upper tapered groove has a curved surface whose inclination is continuously changed; the microstructures are disposed on the light transmitting body.
  • the direct light guide plate disclosed in the present invention comprises: a plurality of the above-mentioned direct light guiding structures, and the light transmitting bodies of the direct light guiding structures are connected.
  • the illuminating device of the present invention comprises at least one circuit board, at least one light source and at least one of the aforementioned direct light guiding structures; wherein the circuit board comprises a top surface and a bottom surface; the light source is disposed on the circuit board The top surface; the direct light guiding structure is disposed on the top surface of the circuit board, and the light source is received in the lower receiving groove of the direct light guiding structure.
  • FIG. 1 is a cross-sectional view of a light emitting device in accordance with a first preferred embodiment of the present invention
  • FIG. 2 is a perspective view of the light-transmitting body of the direct-type light guiding structure of FIG. 1;
  • 3A is a schematic view of light transmitted in the light-transmitting body of FIG. 1;
  • 3B is a light energy distribution diagram in the light-transmitting body of FIG. 1;
  • Figure 3C is a diagram showing the angle distribution of the light corresponding to Figure 3B;
  • 3D is another schematic view of light transmitted in the light-transmitting body of FIG. 1;
  • FIG. 4A is a cross-sectional view of a light emitting device in accordance with a second preferred embodiment of the present invention.
  • FIG. 4B is a schematic view of light transmitted in the light-transmitting body of FIG. 4A;
  • Figure 5 is a cross-sectional view of a light emitting device in accordance with a third preferred embodiment of the present invention.
  • Figure 6 is a cross-sectional view showing a light emitting device in accordance with a fourth preferred embodiment of the present invention.
  • Figure 7 is a cross-sectional view showing a light emitting device in accordance with a fifth preferred embodiment of the present invention.
  • Figure 8 is a cross-sectional view of a light emitting device in accordance with a sixth preferred embodiment of the present invention.
  • Figure 9 is a cross-sectional view of a light emitting device in accordance with a seventh preferred embodiment of the present invention.
  • Figure 10A is a cross-sectional view of a light emitting device in accordance with an eighth preferred embodiment of the present invention.
  • Figure 10B is a perspective view of the direct type light guide plate of the light-emitting device of Figure 10A;
  • FIG. 10C is a perspective view of another perspective view of the direct type light guide plate of the light emitting device of FIG. 10A; FIG.
  • Figure 11A is a cross-sectional view of a light emitting device in accordance with a ninth preferred embodiment of the present invention.
  • FIG. 11B is a light energy distribution diagram in the light-transmitting body of FIG. 11A;
  • Figure 11C is another cross-sectional view of a light emitting device in accordance with a ninth preferred embodiment of the present invention.
  • Figure 11D is another cross-sectional view of a light emitting device in accordance with a ninth preferred embodiment of the present invention.
  • Figure 11E is a cross-sectional view of a light emitting device in accordance with a ninth preferred embodiment of the present invention.
  • Figure 12A is a cross-sectional view of a light emitting device in accordance with a tenth preferred embodiment of the present invention.
  • Figure 12B is a perspective view of the direct type light guide plate of the light-emitting device of Figure 12A;
  • FIG. 12C is a perspective view of another perspective view of the direct type light guide plate of the light emitting device of FIG. 12A;
  • Figure 13 is a plan view showing a light-emitting device in a combined state according to an eleventh preferred embodiment of the present invention.
  • Figure 14 is a plan view showing a light-emitting device in an exploded state according to an eleventh preferred embodiment of the present invention.
  • Figure 15 is a side elevational view of the light-emitting device in a combined state in accordance with an eleventh preferred embodiment of the present invention.
  • Figure 16 is a perspective view of the two direct-type light guiding structures of the light-emitting device of Figure 13 (microstructure not shown);
  • Figure 17 is a side view (microstructure not shown) of two direct light guiding structures of the light emitting device of Figure 13;
  • Figure 18 is a plan view showing a light-emitting device in an exploded state according to a twelfth preferred embodiment of the present invention.
  • Figure 19 is a plan view showing a light-emitting device in a combined state according to a thirteenth preferred embodiment of the present invention.
  • Figure 20 is a plan view showing a light-emitting device in an exploded state according to a thirteenth preferred embodiment of the present invention.
  • Figure 21 is a plan view showing a light-emitting device in an exploded state according to a fourteenth preferred embodiment of the present invention.
  • Figure 22 is a plan view showing a light-emitting device in an exploded state according to a fifteenth preferred embodiment of the present invention.
  • Figure 23 is a plan view showing a light-emitting device in a combined state according to a sixteenth preferred embodiment of the present invention.
  • Figure 24 is a plan view showing a state in which a light-emitting device according to a seventeenth preferred embodiment of the present invention is combined.
  • FIG. 1 is a cross-sectional view of a light emitting device according to a first preferred embodiment of the present invention
  • FIG. 2 is a perspective view of the light transmitting body of the direct light guiding structure of FIG.
  • the illuminating device A1 of the present embodiment may include a circuit board 11, a light source 12, a reflective layer 13, and a direct light guiding structure 14. The technical contents of each component will be sequentially described below.
  • the circuit board 11 can carry other components of the illumination device 1 and can transfer electrical energy to the light source 12.
  • the circuit board 11 can be a general printed circuit board or can be a metal core printed circuit board (metal Core printed circuit board, The MCPCB) is to increase the heat dissipation efficiency of the circuit board 11; further, the circuit board 11 includes a top surface 111 and a bottom surface 112 opposite to the top surface 111.
  • the light source 12 can receive electrical energy to emit light and is disposed on the top surface 111 of the circuit board 11.
  • the light source 12 is further electrically connected to the circuit board 11 to receive the transmitted electrical energy of the circuit board 11.
  • the light source 12 can be a wire-connected light-emitting diode (wire) Bonded LED), flip-chip LED, SMD type LED or other types of light-emitting diodes.
  • the reflective layer 13 can reflect light and can be disposed on the top surface 111 of the circuit board 11 so that light cannot pass through the circuit board 11 (the function of the reflective layer 13 will be further described in describing FIG. 3A).
  • the reflective layer 13 can cover almost the entire top surface 111 except where the light source 12 is located.
  • the reflective layer 13 can be a white coated plastic (such as PET, PP, PE, PVC, PC, PMMA, PU, PS, ABS or other plastic) or a metal (such as Al, Ag, Ni, Mo, Zn).
  • the reflective layer 13 may comprise a plurality of reflective particles (reflective A plastic material such as TiO2, CaCO3, ZnO2, SiO2, Al2O3, SnO2, CeO2 particles, or metal particles.
  • the method of disposing the reflective layer 13 on the circuit board 11 may be a method such as sputtering, thermal evaporation, coating or pasting.
  • the reflective layer 13 may also be provided on the lower surface 1412 of the direct-type light guiding structure 14 to be described later. When so implemented, the reflective layer 13 can cover the entire lower surface 1412 except where the lower receiving groove 1415 is located.
  • the direct light guiding structure 14 receives light and then uniformly outputs the light.
  • the direct light guiding structure 14 can be disposed on the top surface 111 of the circuit board 11 (located above the top surface 111) and placed on the reflective layer 13; in other words, the reflective layer 13 is located on the direct light guiding structure 14 and the circuit board. 11 between.
  • the direct light guiding structure 14 can include a light transmissive body 141 and a plurality of microstructures 142.
  • the light transmitting body 141 can be made of any transparent or translucent polymer material, such as silicone or cyclic olefin copolymer (cyclic Olefin Copolymer), polyurethane, polystyrene, polyester, ethylene terephthalate Terephthalate, PET), polycarbonate (PC), polyimide (PI), polymethacrylate (polymethylmethacrylate, PMMA), acrylonitrile-butadiene-styrene Copolymer, ABS), polyethylene (PE), polypropylene (polypropylene, PP) or a combination of the above materials.
  • the light transmitting body 141 can be formed by injection molding (injection) Molding, molding, extrusion, pressing or embossing are used to make the process.
  • the light-transmitting body 141 can include an upper surface 1411, a lower surface 1412, an outer annular surface 1413, an upper tapered groove 1414, and a lower receiving groove 1415.
  • the upper surface 1411 and the lower surface 1412 are all planar and parallel and opposite each other; the lower surface 1412 is in contact with the reflective layer 13.
  • the outer annular surface 1413 is located between the upper surface 1411 and the lower surface 1412 and connects the upper surface 1411 and the lower surface 1412.
  • the outer annulus 1413 can include six associated sides 14131, each side 14131 being perpendicular to the lower surface 1412.
  • the upper tapered groove 1414 is formed on the upper surface 1411, or it can be said that a portion of the upper surface 1411 is recessed downward to form the upper tapered groove 1414, so that the upper surface 1411 is partially curved.
  • the lower accommodating groove 1415 is formed on the lower surface 1412, or a portion of the lower surface 1412 is recessed upward to form a lower accommodating groove 1415.
  • the lower accommodating groove 1415 can communicate with each other.
  • the light source 12 can be received in the lower receiving groove 1415.
  • a sharp point 14141 of the upper tapered groove 1414 (that is, the lowest point of the upper tapered groove 1414) may be a sharp point 14153 with the tapered portion 14151 of the lower receiving groove 1415 (that is, the highest point of the tapered portion 14151).
  • the surface of the upper tapered groove 1414 is based on the edge ray theorem (edge-ray)
  • edge-ray edge-ray
  • the design is such that when light strikes the surface of the upper tapered groove 1414, it is totally reflected without penetrating.
  • the surface of the upper tapered groove 1414 is a curved surface whose inclination is continuously changed; in other words, the upper tapered groove 1414 can locally make the upper surface 1411 a curved surface whose slope continuously changes.
  • the slope of each surface of the surface will cause total reflection when the light of a particular angle of incidence hits it. The above phenomenon of total light reflection is further explained below.
  • FIG. 3A a schematic diagram of light transmission in the light-transmitting body of FIG.
  • the light L emitted from the light source 12 can pass through the surface of the lower receiving groove 1415 and enter the light transmitting body 141.
  • the surface of the lower accommodating groove 1415 When the light L passes through the surface of the lower accommodating groove 1415, it refracts and advances toward the upper tapered groove 1414; in other words, the surface of the lower accommodating groove 1415 has a function of guiding light.
  • the light ray L is emitted from the front surface (top surface) of the light source 12, so that only the surface of the lower accommodating groove 1415 located above the front surface of the light source 12 has light L passing therethrough, and it is required to have a function of guiding light.
  • the surface of the lower accommodating groove 1415 that is, the surface of the columnar portion 14152 located below the front surface of the light source 12 does not need to have a function of guiding light.
  • the rays L then collide with different portions of the curved surface of the upper tapered groove 1414. Since the incident angle of the light rays L is greater than the critical angle (the size of the critical angle is determined by the material of the light-transmitting body 141 and the environment in which the light-transmitting body 141 is located, which is about 42 degrees in this embodiment), the light rays L will Reflected by the surface without penetrating the surface.
  • the light L reflected by the curved surface advances toward the outer annular surface 1413 of the light transmitting body 141. Part of the light L will strike the lower surface 1412 (or the upper surface 1411) and then be reflected by the lower surface 1412 (or the upper surface 1411) because the angle of incidence of the light L is still greater than the critical angle; the lower surface 1412 (or the upper surface 1411) The reflected light continues to advance toward the outer annulus 1413 of the light transmissive body 141.
  • the light-transmitting body 141 can transmit the light emitted by the light source 12 laterally without being concentrated in the vicinity of the light source 12, and will not be directly directed upward.
  • Upper surface 1411 and lower surface 1412 may not be smooth or level due to manufacturing tolerances or manufacturing tolerances. Therefore, some of the light rays L will penetrate the lower surface 1412 when they hit the lower surface 1412. The light penetrating the lower surface 1412 is reflected back into the light transmitting body 141 by the reflective layer 13 under the lower surface 1412, ensuring that the light L does not leak from the lower surface 1412 of the light transmitting body 141.
  • FIG. 3B is a light energy distribution diagram in the light-transmitting body of FIG. 1 , and this figure can be obtained by experimental measurement or simulation; the black part in the figure indicates that only a small amount of weak light passes through it. It is further understood from the distribution of light that, in the absence of microstructure 142, light will hardly pass through upper tapered groove 1414, and light passes over upper tapered groove 1414, upper surface 1411, and lower surface 1412. It is totally reflected and proceeds toward the outer annular surface 1413 of the light transmitting body 141.
  • FIG. 3C Please refer to FIG. 3C for the ray angle distribution diagram corresponding to FIG. 3B.
  • the angle is between 45 degrees and -45 degrees, and the remaining angles (complementary Angle) is greater than the critical angle (42 degrees). Therefore, the light reflected by the upper tapered groove 1414 is still totally reflected after hitting the upper surface 1411 and the lower surface 1412.
  • the half cone angle ⁇ c of the tapered portion 14151 of the lower accommodating groove 1415 (as shown, the half of the angle of the tapered portion is a half cone angle) and "light”
  • the incident angle ⁇ i" of the L striking the upper tapered groove 1414 affects the size of the light transmitting body 141.
  • the incident angle ⁇ i of each of the rays L striking the upper tapered groove 1414 may be different.
  • the half cone angle ⁇ c of the tapered portion 14151 of the lower receiving groove 1415 of the present embodiment is substantially equal to (that is, very close to) the complementary angle of the critical angle, and the minimum incident angle ⁇ i is substantially equal to (that is, very close to) the critical angle.
  • the angle therefore, the thickness of the light-transmitting body 141 can be minimized (if machining errors are not considered).
  • FIG. 3D is another schematic diagram of light transmitted in the light-transmitting body of FIG.
  • the tapered portion 14151 of the lower receiving groove 1415 When the half taper angle ⁇ c of the tapered portion 14151 of the lower receiving groove 1415 is equal to 90 degrees, the tapered portion 14151 will be equivalently absent, so that the lower receiving groove 1415 is substantially a cylindrical groove. In this case, the size of the upper tapered groove 1414 is changed so that the light L can still be reflected by the surface of the upper tapered groove 1414, but the thickness of the transparent body 141 is made larger (with the tapered portion 14151).
  • the half cone angle ⁇ c is equal to the complementary angle of the critical angle).
  • the microstructures 142 are used to break or prevent total reflection of light so that the light can leave the light transmitting body 141 .
  • the microstructures 142 are disposed on the light transmitting body 141 and distributed on the curved surfaces of the upper surface 1411 and the upper tapered groove 1414 of the light transmitting body 141.
  • the microstructures 142 may be linear, dot-like or any regular or irregularly shaped recessed structure.
  • the microstructure 142 of the present embodiment is a circular fine line.
  • the trench has a depth of 30 micrometers and a width of 50 micrometers; the microstructures 142 may also be raised structures or the like.
  • the microstructures 142 and the light transmissive body 141 may be integrally formed, whether it is a recessed structure or a raised structure.
  • the microstructures 142 can also be ink materials (ink Material) printed or coated on the light transmitting body 141.
  • the portion of the light-transmitting body 141 that is disposed by the microstructure 142 may become rough and uneven, so that when the light hits the portions, the incident angle of the light has a chance less than the critical angle, no longer. It is totally reflected back into the light transmitting body 141. As such, the light has a chance to leave the light transmitting body 141.
  • the microstructures 142 are away from the sharp point 14141 (light source 12) of the upper tapered groove 1414, the denser the distribution of the microstructures 142; in other words, the portion of the transparent body 141 that is farther away from the sharp point 14141 has more micro Structure 142 is distributed.
  • microstructures 142 are distributed in such a manner that the light uniformly leaves the light transmitting body 141.
  • microstructures 142 distributed on the curved surface of the upper tapered groove 1414 are lower than the height of the microstructures 142 distributed on the upper surface 1411. In other words, the heights of the microstructures 142 are not all the same.
  • the overall distribution of the microstructures 142 is a three-dimensional distribution (three-dimensional Distribution), the microstructure different from the existing light guiding structure is a planar distribution.
  • the above embodiment controls the uniformity of the light leaving the light transmitting body 141 by the uneven distribution of the microstructures 142.
  • the uniformity of the light exiting the light transmitting body 141 can also be controlled by the depth, size, angle or shape of the microstructures 142, and the like.
  • FIG. 4A is a cross-sectional view of a light emitting device in accordance with a second preferred embodiment of the present invention.
  • the main difference between the light-emitting device A2 and the light-emitting device A1 of the second preferred embodiment is that the upper surface 1411 of the light-transmitting body 141 of the light-emitting device A2 is not planar but a curved surface.
  • the light transmitting body 141 can have a large light emitting area (light The emitter range is compared to when the upper surface 1411 is a flat surface.
  • the microstructures 142 will vary correspondingly with the curvature of the curved surface, and this variation may include variations in the number, angle, shape, or size of the microstructures 142.
  • the upper surface 1411 is adjacent to the outer annulus 1413 and may have fewer microstructures 142; this is because the upper surface 1411 of the curved surface itself can destroy the total reflection of the light without relying entirely on the microstructure 142.
  • the lower accommodating groove 1415 of the light transmitting body 141 of the illuminating device A2 has only the tapered portion 14151; in other words, the lower accommodating groove 1415 is a lower tapered groove.
  • the lower receiving groove 1415 can be adapted to accommodate the "light source 12 that emits light on both sides and the front side"; the reason is as follows.
  • FIG. 4B is a schematic diagram of light transmitted in the light-transmitting body of FIG. 4A.
  • each surface of the lower receiving groove 1415 needs to be able to guide the light L to the surface of the upper tapered groove 1414, and when the lower receiving groove 1415 is the lower tapered groove. Can meet this requirement.
  • FIG. 5 and FIG. 6 are cross-sectional views of a light emitting device according to third and fourth preferred embodiments of the present invention, respectively.
  • the main difference between the light-emitting device A3 and the light-emitting device A2 of the third preferred embodiment is that the lower surface 1412 of the light-transmitting body 141 of the light-emitting device A3 is also distributed with the microstructures 142.
  • the microstructures 142 on the lower surface 1412 can also control the light output intensity of the light transmissive body 141.
  • the main difference between the light-emitting device A4 and the light-emitting device A3 of the fourth preferred embodiment is that the upper surface 1411 of the light-transmitting body 141 of the light-emitting device A4 is not distributed with the microstructures 142, and the microstructures 142 are only distributed on the lower surface 1412.
  • the reflective layer 13 is disposed on the lower surface 1412 but is not trapped in the microstructures 142.
  • the illuminating device A4 is characterized in that a diffuser (which may be a diffusing plate or a diffusing film) may be disposed on the upper surface 1411 (refer to FIG. 10A); when there is a gap between the diffuser and the upper surface 1411, the diffuser is disposed on the diffuser. It is easy to observe the unevenness of light and dark; however, when the upper surface 1411 has no distribution of the microstructure 142, the unevenness of light and darkness on the diffuser becomes less noticeable.
  • FIG. 7 is a cross-sectional view of a light emitting device according to a fifth preferred embodiment of the present invention.
  • the light-transmitting body 141 of the light-emitting device A5 of the present embodiment further includes a plurality of hollowed-out grooves 1416.
  • the hollow slots 1416 are formed on the lower surface 1412 of the light transmitting body 141, and the lower receiving slots 1415 are located between the hollow slots 1416.
  • the arrangement of the hollowed out grooves 1416 can reduce the manufacturing material of the light transmitting body 141 to reduce the manufacturing cost of the light transmitting body 141.
  • the hollowed out groove 1416 may be a dome-shaped hollowed out groove or a tapered hollowed out groove, but is not limited.
  • the hollowing groove 1416 does not affect the transmission of light to the outer annular surface 1413 of the light transmitting body 141. This is because, when referring to FIGS. 3A and 3B, when the light L is transmitted in the light transmitting body 141, the light transmitting body 141 The portion near the lower receiving groove 1415 has almost no light passing through; after the portion where almost no light passes is removed, the hollowed out groove 1416 is formed. Therefore, the hollow groove 1416 has almost no light (or weak light) passing through it, so that the transmission of light in the light transmitting body 141 is not affected.
  • the hollowed holes 1416 can communicate with each other to form an annular hollowed out groove (see FIG. 10C); and the lower receiving groove 1415 is surrounded by the annular hollowed out groove.
  • the annular hollowing groove can reduce the manufacturing material of the light transmitting body 141.
  • FIG. 8 and FIG. 9 are cross-sectional views of a light emitting device according to sixth and seventh preferred embodiments of the present invention, respectively.
  • the main difference between the illuminating device A6 and the illuminating device A5 of the sixth preferred embodiment is that the upper surface 1411 of the light transmitting body 141 of the illuminating device A6 is not planar but a curved surface; further, the hollowing groove 1416 of the light transmitting body 141 A reflective layer 13 is also provided to prevent light from being emitted from the hollowed out slot 1416.
  • the main difference between the light-emitting device A7 and the light-emitting device A6 of the seventh preferred embodiment is that the microstructures 142 are further distributed in the hollowed out grooves 1416, and the reflective layer 13 is trapped in the microstructures 142.
  • the reflective layer 13 may also not sink into the microstructures 142 (similar to the illumination device A4 shown in FIG. 6), only to contact or be near the lower surface 1412.
  • the upper surface 1411 of the light-transmitting body 141 of any one of the light-emitting devices A5 to A7 may not be provided with the microstructure 142 (similar to the light-emitting device A4); or, of any of the light-emitting devices A5 to A7
  • the top surface 111 of the circuit board 11 may not be provided with the reflective layer 13.
  • FIG. 10A is a cross-sectional view of a light-emitting device according to an eighth preferred embodiment of the present invention
  • FIG. 10B and FIG. 10C are perspective views of the direct-type light guide plate of the light-emitting device of FIG. 10A (microstructure not shown).
  • the light-emitting device A8 of the present embodiment and the light-emitting device A6 of the sixth embodiment include the same direct-type light-guiding structure 14, but the direct-type light-guiding structure 14 of the light-emitting device A8 is plural; the direct-type light-guiding structures 14 are mutually Connected and side by side to form a constant light guide plate.
  • the light-transmitting body 141 of the direct-type light-guiding structure 14 is integrally formed, and the hollow grooves 1416 are all annular hollow grooves. Further, the lower surface 1412 of the light transmitting body 141 may be coplanar.
  • the light-emitting device A8 further includes a plurality of light sources 12 and a support base 15, and optionally, if necessary, at least one circuit component 16 and at least one connecting rod 17; the technical content of each component will be sequentially described below.
  • the light source 12 is disposed on the top surface 111 of the circuit board 11.
  • the direct light guiding structures 14 are also disposed on the top surface 111 of the circuit board 11, and the light sources 12 are respectively received by the direct light guiding lights.
  • the lower receiving groove 1415 of the structure 14 is.
  • the light transmitting bodies 141 of the direct light guiding structures 14 may be integrally formed.
  • the support base 15 (also referred to as a base or a back plate) is used to enhance the structural strength of the light-emitting device A8 or to increase heat dissipation efficiency.
  • the support base 15 can be an aluminum plate disposed on the bottom surface 112 of the circuit board 11.
  • At least one circuit component 16 (e.g., control wafer, driver die, resistor, capacitor, etc.) is also disposed on the top surface 111 of the circuit board 11 and housed in one of the hollowed out slots 1416. If the direct light guiding structure 14 has no hollow slots 1416 (such as shown in FIG. 1), the circuit board 11 requires an additional portion to extend beyond the direct light guiding structure 14 so that the circuit component 16 can be placed in a direct type. Outside the light guiding structure 14, the interference of the direct light guiding structure 14 is prevented from being placed on the circuit board 11. It can be seen that when the direct light guiding structure 14 has the hollowed out groove 1416, the width or length of the circuit board 11 can be reduced, in addition to reducing the manufacturing material of the light transmitting body 141.
  • the direct light guiding structure 14 has the hollowed out groove 1416, the width or length of the circuit board 11 can be reduced, in addition to reducing the manufacturing material of the light transmitting body 141.
  • At least one connecting rod 17 is used to fix the circuit board 11, the direct light guiding structure 14 and the support base 15.
  • the connecting rod 17 includes a rod body 171, two stopping portions 172 and a supporting plane 173.
  • the rod body 171 extends through the circuit board 11 , the direct light guiding structure 14 and the support base 15 , and the two stopping portions 172 can each be a barb.
  • the two stopping portions 172 are respectively fastened to the direct light guiding structure 14 and the supporting base.
  • the support plane 173 is disposed at an upper end of the rod body 171 and is equal to the upper surface 1411 of the light transmitting body 141.
  • An illuminator 18, an optical layer 19 and a liquid crystal panel 20 may be further disposed on the illuminating device A8 to form a backlight module of the liquid crystal display.
  • the diffuser 18, the optical layer 19, and the liquid crystal panel 20 are sequentially stacked on the upper surface 1411 of the light transmitting body 141.
  • the bottom surface of the diffuser 18 can be bonded to the support plane 173 of the connecting rod 17 so that the diffuser 18 does not lift up to cause uneven brightness.
  • the optical layer 19 may include a lower diffusion film (bottom Diffuser film), brightness enhancement film (BEF), reflective brightness enhancement film (dual brightness) Enhancement film, DBEF) and top diffuser film are commonly used in backlight modules.
  • the light-transmitting body 141 of the light-emitting device A9 of the present embodiment includes a plurality of hollowed-out grooves 1417.
  • the hollow slots 1417 are formed on the lower surface 1412 of the light transmitting body 141, and the lower receiving slots 1415 are located between the hollow slots 1417.
  • the hollow slots 1417 extend to the outer annular surface 1413 of the light transmitting body 141.
  • the hollowed out slots 1417 can each have a flat surface 14171 that is substantially parallel to the upper surface 1411.
  • the arrangement of the hollowing groove 1417 can reduce the manufacturing material of the light transmitting body 141; even, the sum of the volumes of the hollowing grooves 1417 can be larger than the volume of the transparent body 141, so that the volume is made larger.
  • the material of the light body 141 can be reduced by more than half, compared to a light-transmissive body (such as that shown in FIG. 1) that does not form the hollowed out groove 1417.
  • the volume of the light-transmitting body 141 includes only the solid portion of the light-transmitting body 141, and does not include the non-solid portion of the light-transmitting body 141 (for example, the upper tapered groove 1414, the lower receiving groove 1415, and the hollowed-out groove 1417). .
  • the hollowing groove 1417 does not affect the transmission of light in the light transmitting body 141. This is because: referring to FIG. 3B and FIG. 3C, the angle of the light after the point P (after being reflected by the upper tapered groove 1414) The remaining angles are all larger than the critical angle, so even if the thickness of the light-transmitting body 141 after the P point is reduced, the light can be totally reflected in the light-transmitting body 141.
  • the space formed after the light-transmissive body 141 after the P point is thinned is a part of the hollowed out groove 1417.
  • FIG. 11B Please refer to FIG. 11B for the light energy distribution diagram in the light-transmitting body of FIG. 11A. It can be further understood from the distribution of the light that when the light-transmissive body 141 is thinned and no microstructure is disposed on the light-transmitting body 141, the light can be totally reflected whether it hits the plane 14171 or the upper surface 1411.
  • the reflective layer 13 of the light-emitting device A9 is different from the foregoing embodiment except for the hollowed out groove 1417.
  • the reflective layer 13 does not entirely conform to the top surface 111 of the circuit board 11, but is partially located in the hollowed out groove 1417 and is adjacent to the lower surface 1412 of the light transmitting body 141.
  • the illumination device A9 can have other variations.
  • the microstructures 142 may be distributed on the lower surface 1412 of the light transmissive body 141 and face the hollowed out grooves 1417 and covered by the reflective layer 13 (eg, white paint); or, as shown in FIG. 11D
  • the reflective layer 13 of the light-emitting device A9 can be entirely attached to the top surface 111 of the circuit board 11; alternatively, the light-emitting device A9 can be free of the reflective layer 13 (not shown).
  • the flat surface 14171 of the hollowed out groove 1417 of the light transmitting body 141 may be inclined and not parallel to the upper surface 1411; the lower receiving groove 1415 of the light transmitting body 141 may have only the tapered portion 14151, so that the lower portion
  • the receiving groove 1415 is substantially a lower tapered groove.
  • the light-transmitting body 141 can also have a plurality of protruding structures 1418 protruding downwardly from the lower surface 1412 of the light-transmitting body 141 and between the lower receiving groove 1415 and the hollowing groove 1417.
  • the circuit board 11 has a plurality of through holes 113, and the protruding structures 1418 can be respectively inserted into the through holes 113 such that the transparent body 141 is fixed on the circuit board 11 without using other fixing elements (for example, as shown in FIG. 10A). Connecting rod 17).
  • the end of the protruding structure 1418 can form a stop structure (for example, a barb, not shown), so that the protruding structure 1418 is not easily pulled out after being inserted into the through hole 113, thereby further fixing the light transmitting body 141 to the circuit board 11 more stably. on.
  • a stop structure for example, a barb, not shown
  • the length of the protruding structure 1418 can be less than the depth of the perforation 113 such that the protruding structure 1418 will not protrude beyond the bottom surface 112 of the circuit board 11 after the protruding structure 1418 is inserted into the through hole 113. . As such, there will be a space in the perforation 113 that is not occupied by the protruding structure 1418, and the space can be filled with glue (not shown) to secure the protruding structure 1418 to the circuit board 11.
  • FIG. 12A is a cross-sectional view of a light-emitting device according to a tenth preferred embodiment of the present invention
  • FIG. 12B and FIG. 12C are perspective views (microstructures not shown) of the direct-type light guide plate of the light-emitting device of FIG. 12A.
  • the light-emitting device A10 of the present embodiment and the light-emitting device A9 of the ninth embodiment include the same direct-type light-guiding structure 14, but the direct-light light-guiding structure 14 of the light-emitting device A10 is plural, and each of the direct-type light-guiding structures 14
  • the light transmitting bodies 141 are connected to each other to constitute a direct type light guide plate.
  • the upper surfaces 1411 of the light transmitting bodies 141 may be coplanar.
  • Each of the hollow grooves 1417 of the direct light guiding structure 14 has a microstructure 142 distributed therein, and the reflective layer 13 is a reflective sheet which is close to the lower portion of the microstructure 142 but not trapped in the
  • the other elements (the light source 12, the support base 15, the circuit element 16, the diffuser 18, the optical layer 19, and the liquid crystal panel 20) of the light-emitting device A10 of the present embodiment are the same as those of the light-emitting device A8, and thus will not be described again.
  • the hollowed-out groove 1417 of the light-transmitting body 141 of the light-emitting device A10 is large, so that a large or thick circuit component 16 can be accommodated.
  • the light-emitting device A11 of the present embodiment includes a plurality of circuit boards 11, a plurality of light sources 12, a plurality of direct light guiding structures 14, a support base 15, a circuit component 16, and a driving circuit board 21.
  • the circuit boards 11 are elongated, and one ends of the circuit boards 11 can be connected to the driving circuit board 21 via a connector 22. Furthermore, the circuit boards 11 can be connected to each other.
  • the light sources 12 are disposed on the circuit boards 11; the circuit board 11 and the light source 12 disposed thereon may be referred to as a light strip (light) Bar). Since the circuit board 11 is mainly provided for the light source 12, the circuit board 11 can also be referred to as a light source circuit board 11. Alternatively, the light source 12 can also be disposed on the drive circuit board 21.
  • the circuit component 16 can include a control chip and associated peripheral circuitry of the control die, etc., and is disposed on the driver circuit board 21 such that the driver circuit board 21 can issue control signals to control the light source 12 on the light source circuit board 11 to emit light.
  • the driving circuit board 21 can be fixed to the support base 15 by a layer of thermal conductive glue 23 or a plurality of bolts 24.
  • the thermal conductive adhesive 23 can quickly transfer the thermal energy of the drive circuit board 21 to the support base 15.
  • the light-transmitting bodies 141 of the direct-type light-guiding structures 14 are detachably connected such that the direct-type light-guiding structure 14 constitutes a direct-type light guide plate.
  • FIG. 16 and FIG. 17, are respectively a perspective view and a side view (microstructure not shown) of two direct-type light guiding structures of the light-emitting device of FIG.
  • the side surface 14131 of the light transmitting body 141 of the direct type light guiding structure 14 is inclined with respect to the upper surface 1411.
  • the inclination angles of the side faces 14131 of the two adjacent direct light guiding structures 14 are opposite (that is, if one of the inclination angles is 45 degrees, the other inclination angle is minus 45 degrees), so the adjacent two straight downs
  • the side surface 14131 of the light guiding structure 14 is reliably combined.
  • the sloping sides 14131 allow the boundaries between adjacent direct light guiding structures 14 to overlap such that the rays of the boundary overlap.
  • gaps of different sizes may appear between the adjacent direct light guiding structures 14.
  • the overlapping rays can cause bright or dark lines caused by slits of different sizes to become inconspicuous after penetrating the diffuser. It should be noted that when the tilt angle is between 20 degrees and 70 degrees, the above effects can be more significant.
  • the illuminating device A12 of the present embodiment includes a plurality of illuminating devices A11 and a control circuit board 25 of the eleventh embodiment.
  • the driving circuit boards 21 of the light-emitting devices A11 are connected to each other, and then connected to the control circuit board 25 through the connector 22.
  • the control circuit board 25 can be connected to another circuit component 27 (including a micro control unit (micro) Control unit, The MCU) and its peripheral circuits) send control signals to the driving circuit board 21, and the driving circuit board 21 controls the light source 12 on the light source circuit board 11 to emit light according to the content of the control signals.
  • FIG. 19 and FIG. 20 are top plan views and exploded views of a light-emitting device in a combined state according to a thirteenth preferred embodiment of the present invention.
  • the difference from the illuminating device A11 of the eleventh embodiment is that the illuminating device A13 of the present embodiment includes only one circuit board 11, and the light source 12, the direct light guiding structure 14, the circuit component 16, and the connector 22 are all disposed on On the circuit board 11.
  • the circuit board 11 is a driving circuit board, and can directly control whether the light source 12 emits light.
  • the circuit board 11 is a rectangular board having a connector 22 on each of its four sides so that the other side of the circuit board 11 can be connected to other light-emitting devices (not shown).
  • the illuminating device A14 of the present embodiment includes a plurality of illuminating devices A13 of the thirteenth embodiment, a support base 15, and a control circuit board 25.
  • the light-emitting devices A13 are side by side, and the circuit boards 11 of the light-emitting devices A13 are connected to each other through the connector 22.
  • the light-emitting devices A13 are also connected to the control circuit board 25 via the connector 22.
  • the light-emitting device 14 and the control circuit board 25 are all disposed on the support base 15 .
  • the light-emitting device A15 of the present embodiment includes a plurality of light source circuit boards 11, a plurality of light sources 12, a plurality of direct light guiding structures 14, a support plate 15, and two control circuit boards 25.
  • the circuit boards 11 and the light sources 12 can form a plurality of light strips. The strips are connected through a connector 22 and then connected to one of the control boards 25 via a connector 22.
  • the light strips are disposed between the two control circuit boards 25, and the light strips and the two control circuit boards 25 are disposed on the support board 15.
  • Each control circuit board 25 controls whether the light source 12 of the light strip emits light.
  • the illuminating device A16 of the present embodiment includes only one control circuit board 25, and additionally includes a driving circuit board 21 and a connecting line 26 (for example, a cable).
  • the light strips are disposed between the control circuit board 25 and the drive circuit board 21, and are connected to the control circuit board 25 and the drive circuit board 21.
  • the control circuit board 25 and the drive circuit board 21 are connected by a connection line 26.
  • the control circuit board 25 itself can control whether the light source 12 of the light bar emits light, and can transmit a control signal to the driving circuit board 21 through the connecting line 26, so that the driving circuit board 21 controls whether the light source 12 of the light bar emits light according to the control signal. .
  • the light-emitting device A17 of the present embodiment includes only one control circuit board 25; further, the control circuit board 25 is horizontally arranged, and the light bars are vertically arranged.
  • the above-described light-emitting devices A11 to A17 are characterized in that the circuit board 11, the light source 12, and the light guiding structure 14 can be easily expanded in number according to requirements to increase the light-emitting range of the light-emitting devices A11 to A17.
  • the illuminating device and the direct light guiding structure of the present invention can have the following features:
  • the upper tapered groove and the microstructure of the direct light guiding structure allow the direct light guiding structure to uniformly output the light after receiving the light emitted by the light source;
  • the direct light guiding structure can make the overall thickness of the light emitting device thin, and can reduce the number of light sources;
  • the thickness of the light transmitting body may be small
  • the hollowed-out groove of the light-transmitting body can reduce the manufacturing material of the light-transmitting body, and does not affect the transmission of light in the light-transmitting body;
  • the side surface of the light-transmitting body may be inclined to avoid bright lines or dark lines on the interface between the two non-integrally formed light-transmitting bodies;
  • the plurality of direct light guiding structures may be connected to form a direct light guiding plate, and the light transmitting bodies of the direct light guiding structures may be integrally formed;
  • the circuit board, the light source and the direct light guiding structure of the illuminating device have various configurations to meet various applications;
  • the circuit board, the light source and the direct light guiding structure of the light emitting device can be easily expanded to increase the light emitting range of the light emitting device.

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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)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention porte sur une structure de guidage de lumière de type direct (14), sur une plaque de guidage de lumière de type direct et sur un dispositif électroluminescent (A1-A17). La structure de guidage de lumière de type direct (14) comprend un corps de transmission de lumière (141) et de multiples microstructures (142). Le corps de transmission de lumière (141) comprend un sillon supérieur en forme de cône (1414) et un sillon inférieur de réception (1415). Le sillon supérieur en forme de cône (1414) a une surface incurvée ayant une pente changeant de manière continue. Les microstructures (142) sont agencées sur le corps de transmission de lumière (141). Le dispositif électroluminescent (A1-A17) comprend une carte de circuits imprimés (11), une source lumineuse (12) et la structure de guidage de lumière de type direct (14). La source lumineuse (12) et la structure de guidage de lumière de type direct (14) sont toutes les deux disposées sur la carte de circuits imprimés (11) et la source lumineuse (12) est reçue dans le sillon inférieur de réception (1415) de la structure de guidage de lumière de type direct (14). Ainsi, la structure de guidage de lumière de type direct (14) peut recevoir la lumière (L) émise par la source lumineuse (12) et transmettre la lumière de manière uniforme. De plus, de multiples structures de guidage de lumière de type direct (14) peuvent être reliées, formant ainsi la plaque de guidage de lumière de type direct.
PCT/CN2012/081260 2011-09-14 2012-09-11 Structure de guidage de lumière de type direct, plaque de guidage de lumière de type direct et dispositif électroluminescent WO2013037288A1 (fr)

Applications Claiming Priority (2)

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CN201110271826.8 2011-09-14
CN 201110271826 CN102411166B (zh) 2010-09-20 2011-09-14 直下式导光结构、直下式导光板及发光装置

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WO2017053235A1 (fr) * 2015-09-25 2017-03-30 Snaptrack, Inc. Système de couplage de lumière préservant l'étendue optique, comportant une ouverture de sortie de lumière plus petite qu'une ouverture d'entrée de lumière

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CN101788118A (zh) * 2009-01-26 2010-07-28 索尼公司 发光装置和图像显示装置
CN102032528A (zh) * 2009-09-18 2011-04-27 敦网光电股份有限公司 发光装置及光扩散板
CN102042562A (zh) * 2009-10-16 2011-05-04 清华大学 导光板及背光模组
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CN101788118A (zh) * 2009-01-26 2010-07-28 索尼公司 发光装置和图像显示装置
CN102032528A (zh) * 2009-09-18 2011-04-27 敦网光电股份有限公司 发光装置及光扩散板
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WO2017053235A1 (fr) * 2015-09-25 2017-03-30 Snaptrack, Inc. Système de couplage de lumière préservant l'étendue optique, comportant une ouverture de sortie de lumière plus petite qu'une ouverture d'entrée de lumière
US9823411B2 (en) 2015-09-25 2017-11-21 Snaptrack Inc. Etendue-preserving light coupling system having light output aperture smaller than light input aperture

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