WO2007029858A1 - Dispositif d’éclairage de surface et unité de source de lumière utilisant celui-ci - Google Patents

Dispositif d’éclairage de surface et unité de source de lumière utilisant celui-ci Download PDF

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Publication number
WO2007029858A1
WO2007029858A1 PCT/JP2006/317991 JP2006317991W WO2007029858A1 WO 2007029858 A1 WO2007029858 A1 WO 2007029858A1 JP 2006317991 W JP2006317991 W JP 2006317991W WO 2007029858 A1 WO2007029858 A1 WO 2007029858A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
led
base end
Prior art date
Application number
PCT/JP2006/317991
Other languages
English (en)
Japanese (ja)
Inventor
Toru Kunimochi
Original Assignee
Minebea Co., Ltd.
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 Minebea Co., Ltd. filed Critical Minebea Co., Ltd.
Publication of WO2007029858A1 publication Critical patent/WO2007029858A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer

Definitions

  • the present invention relates to a planar illumination device and a light source unit using the same, and more particularly to a light source unit suitably used in a head-up display.
  • FIG. 6 is a diagram schematically showing the configuration of an in-vehicle HUD as an example.
  • the HUD 100 includes a light source unit 110 and a projection optical system 104 that are arranged inside an instrument panel 101.
  • the light source unit 110 includes a transmissive liquid crystal panel 103 and an illumination device 102 disposed behind the transmissive liquid crystal panel 103.
  • Image information O generated by the light source unit 110 is a projection optical system including a concave mirror 104 in the illustrated example.
  • the image is projected onto the windshield 105, and the driver D can read the information by visually checking the virtual image I with almost no movement of the driving state power.
  • FIG. 7 is a cross-sectional view showing a conventional configuration example of the light source unit 110 in such a HUD 100 (see, for example, Patent Document 1 and Patent Document 2).
  • a light source unit 110 includes a liquid crystal node 103 and an illuminating device 102 for illuminating the liquid crystal panel 103 from behind.
  • a discharge lamp 114 such as an ultra-high pressure mercury lamp is provided. Is being used.
  • a light reflector 115 is disposed behind the discharge lamp 114, and a diffusion plate for scattering light from the discharge lamp 114 to emit light in a plane between the discharge lamp 114 and the liquid crystal panel 103.
  • 117 and a heat ray cut glass 116 for shielding heat rays generated from the discharge lamp 114 are arranged.
  • Patent Document 1 Japanese Utility Model Publication No. 6-68957
  • Patent Document 2 JP-A-8-238955
  • the use of a discharge lamp as the light source of the illumination device has the following problems.
  • a drive circuit for generating a high voltage is required, so that the apparatus configuration is increased in size.
  • the discharge lamp since the discharge lamp generates a large amount of heat, it is often necessary to take heat dissipation measures such as incorporating a heat dissipation fan, and it is difficult to reduce power consumption.
  • Due to these problems, in-vehicle HUDs have traditionally been mounted only on large vehicles with limited mounting space and some limited vehicles. In order to solve such problems, it is possible to simplify the drive circuit as an illumination device in the HUD light source unit, and also consume less power and heat than a discharge lamp. It is preferable to use a planar lighting device using LEDs.
  • FIG. 8 shows a configuration of a conventional typical planar illumination device using LEDs.
  • the planar illumination device 120 includes a light-transmitting light guide plate 121 and an LED 122 disposed on one end surface 121c of the light guide plate 121, and light is emitted onto the output surface 121a of the light guide plate 121.
  • a diffusion sheet 123 for diffusing and leveling and prism sheets 124 and 125 for condensing light and improving the front luminance are laminated.
  • a pattern for diffusing and reflecting light is usually formed on the back surface 121b of the light guide plate 121, and a reflection plate 126 for reflecting light leaking from the back surface 121b of the light guide plate and returning it to the light guide plate 121 is provided.
  • a planar illumination device 120 light incident on the light guide plate 121 from the LED 122 propagates through the light guide plate 121 while repeating total reflection, and a part of the light is emitted from the output surface 121a. That is, the liquid crystal panel 103 is illuminated uniformly.
  • the prism sheets 124 and 125 are formed by forming multiple triangular prisms on one side thereof, and the two prism sheets 124 and 125 are configured such that the triangular prisms are orthogonal to each other, and The prism sheets 124 and 125 are laminated so that the prism forming surfaces face the liquid crystal panel 103 side.
  • planar illumination device 120 has a problem that the front luminance is low due to the wide light distribution of the emitted light.
  • the light source unit 110 shown in FIG. it is difficult to obtain sufficient luminance as a lighting device of a light source unit in the HUD by simply replacing the lighting device 102 with the planar lighting device 120.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a planar illumination device having high front luminance and excellent luminance uniformity while using an LED, and the surface thereof. It is providing the light source unit using a strip-shaped illuminating device.
  • a planar lighting device includes a light guide plate having a wedge-shaped cross section in which the thickness of the side end surface on the base end portion side decreases toward the side end surface on the front end portion side.
  • an LED disposed to face the side end surface of the light guide plate on the base end portion side, and one side surface of the light guide plate facing the side end surface of the light guide plate on the base end portion side, and one side surface opposite to the one side surface
  • a light condensing body interposed between the LED and a side end surface on the base end side of the light guide plate facing the LED, and the light collector on the base end side of the light guide plate
  • a linear Fresnel lens having a prism group force extending in the thickness direction of the light guide plate is provided on the side surface facing the side end surface, and the light guide plate on the main surface facing the output surface of the light guide plate.
  • a plurality of prisms extending substantially in parallel with the longitudinal direction of the side end surface of the base end portion side are provided.
  • the side end surface force on the base end portion side emits light from the side end surface on the base end portion side of the light guide plate having a wedge-shaped cross section whose thickness is reduced by directing the side end surface on the front end portion side. And the incident light is propagated in the direction in which the thickness of the light guide plate decreases, so that the exit surface force of the light guide plate during the propagation process.
  • the light distribution in the vertical direction (hereinafter simply referred to as the vertical direction) can be narrowed.
  • a light collector is interposed between the light incident surface of the light guide plate and the LED, and a prism extending in the thickness direction of the light guide plate is formed on the side surface of the light collector that faces the light incident surface of the light guide plate.
  • the planar illumination device according to the present invention is sufficiently high in an optical system of a head-up display, for example, by using the direction in which the luminance distribution takes a peak value as the front.
  • a planar illumination device having illumination brightness is realized.
  • a plurality of prisms extending substantially parallel to the longitudinal direction of the side end surface (light incident surface) on the base end portion side of the light guide plate are formed on the main surface facing the exit surface of the light guide plate.
  • a multi-row prism extending in the horizontal direction is used.
  • the cross section is preferably a partially cylindrical ridge.
  • a prism sheet is disposed on the exit surface of the light guide plate, and the surface of the prism sheet facing the exit surface is on the proximal end side of the light guide plate.
  • a multi-triangular triangular prism that extends substantially parallel to the longitudinal direction of the end face is provided, and this makes it possible to broaden the vertical and horizontal light distribution of the light emitted from the light guide plate. Only the direction in which the luminance distribution has a peak value can be converted into a direction substantially perpendicular to the exit surface of the light guide plate. This increases the degree of design freedom for realizing a planar illumination device having sufficiently high illumination brightness, for example, in an optical system of a head-up display.
  • the width between the side surface of the light collector facing the side end surface on the base end side of the light guide plate and the side surface facing the LED is the linear Fresnel. It is approximately the same as the focal length of the lens, which makes it easy and reliable to place the LED at an appropriate position to narrow the horizontal orientation distribution of the light emitted radially from the LED. be able to.
  • a liquid crystal panel in which liquid crystal is held between a pair of substrates on which electrodes are formed, and a planar lighting device according to the present invention disposed behind the liquid crystal panel.
  • a light source unit comprising:
  • the present invention is configured as described above, a sidelight type using an LED as a light source is used.
  • the surface illumination device it is possible to improve the front luminance without causing luminance unevenness.
  • the liquid crystal panel and the planar lighting device according to the present invention arranged behind the liquid crystal panel can constitute a high-intensity light source unit that can be used in a head-up display, In addition to contributing to downsizing and low power consumption, the heat dissipation means required for the light source unit can be simplified.
  • FIG. 1 is a diagram showing a main part of a planar lighting device according to a first embodiment of the present invention, where (a) is a front view, (b) is a side view, and (c) is (b).
  • FIG. 1 is a diagram showing a main part of a planar lighting device according to a first embodiment of the present invention, where (a) is a front view, (b) is a side view, and (c) is (b).
  • FIG. 2 is a side view for explaining the action of the reflecting surface in the planar illumination device shown in FIG.
  • FIG. 3 is a side view showing a main part of a planar illumination device in a second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing a main part of a light source unit including the planar illumination device shown in FIG. 1 as a third embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing a main part of a light source unit including the planar illumination device shown in FIG. 3 as a fourth embodiment of the present invention.
  • FIG. 6 is a diagram schematically showing a configuration of a conventional head-up display.
  • FIG. 7 is a cross-sectional view showing a conventional light source unit used in the head-up display shown in FIG.
  • FIG. 8 is a side view showing a conventional configuration example of a planar illumination device using LEDs.
  • FIG. 1 is a diagram showing a main part of a lighting device according to a first embodiment of the present invention, where (a) is a front view, (b) is a side view, and (c) is an enlarged view of part A of (b). It is.
  • a planar illumination device 10 shown in FIG. 1 includes a light guide plate 11, two LEDs 12, and a light collector 13.
  • the light guide plate 11 is a plate-shaped light guide formed by, for example, injection molding polycarbonate resin, and has a side end surface (hereinafter referred to as a light incident surface) on the base end side 1 lc It is formed so as to have a wedge-shaped cross section whose thickness decreases from the side end surface l id on the distal end side.
  • the light collector 13 is a translucent member formed by injection molding of polycarbonate resin, for example, and is formed in a substantially prismatic shape, and its one side surface 13c is made incident on the light guide plate 11. It is arranged to face the surface 11c.
  • the LED 12 is disposed on the side surface 13d opposite to the side surface 13c of the light collector 13, and faces the light incident surface 1 lc of the light guide plate 11 via the light collector 13.
  • a linear Fresnel lens composed of a prism group extending in the thickness direction of the light guide plate 11 (hereinafter also referred to as Z direction) is provided on a side surface 13c of the light collector 13 facing the light incident surface 11c of the light guide plate 11. 14 is provided corresponding to each LED 12.
  • the linear Fresnel lens 14 realizes a curved surface constituting a single cylindrical lens by a set of refractive surfaces of the individual prisms constituting the linear Fresnel lens 14, and has the same effect as that of the cylindrical lens. It has.
  • the width dimension d between the side surface 13c and the side surface 13d of the light collector 13 is formed so as to substantially match the focal length of the linear Fresnel lens 14.
  • the linear Fresnel lens 14 may be formed integrally with the light collector 13 or may be separate from the light collector 13. It may be formed as a member and fixed to the light collector 13. In addition, in the light collector 13, there is an emission angle of light that radiates in the light collector 13 or its luminance distribution at a position facing the LED 12 on the side surface 13 a. You can install a prism!
  • a main surface (hereinafter referred to as a reflection surface) l ib that faces the light exit surface 11a of the light guide plate 11 has a longitudinal direction of the light incident surface 1 lc of the light guide plate 11 (hereinafter also referred to as X direction!).
  • a reflecting plate 15 as a regular reflecting means is disposed on the back surface of the reflecting surface l ib, and this reflecting plate is made of, for example, silver or the like.
  • a metal plate such as a metal-deposited film, a metal plate such as an aluminum plate subjected to specular force, or a film provided with a reflective layer that also has a multilayer structural force of a polymer thin film may be used.
  • the multi-row prism 16 provided on the reflection surface l ib is composed of a ridge 16 having a partially cylindrical cross section. Constitutes a lens.
  • FIG. 2 is a view showing a side surface of the planar illumination device 10 in order to explain the operation of the protrusion 16 provided on the reflection surface l ib.
  • the reflecting surface l ib of the light guide plate 11 is configured as a flat surface, and no protrusion 16 as shown in FIG. 1 (c) is provided.
  • the outgoing light P from the LED 12 enters the light guide plate 11 from the light incident surface 11c of the light guide plate 11, and the output surface 1 la and the reflection surface 1 lb
  • the force that propagates toward the side end surface l id while repeating reflection between the light-emitting plate 11 and the light-emitting surface 11a of the light guide plate 11 formed in a wedge shape and the reflection surface l ib are inclined with each other at an inclination angle ⁇ . Therefore, the incident angle of light that is reflected by the reflecting surface l ib of the light guide plate 11 and incident on the emitting surface 11a gradually decreases with repeated reflection, and eventually reaches an incident angle that is lower than the critical angle.
  • a part of the light incident on the exit surface 11a exits from the exit surface 11a with a predetermined angle ⁇ corresponding to the incident angle, for example, as the exit light L.
  • the inclination angle ⁇ is set to be relatively small (for example, within the range of 0 ° ⁇ ⁇ 5 °). Over almost the entire surface of 11a, a lot of light is incident on the exit surface 11a at an incident angle that is slightly below the critical angle. As a result, the light distribution of the emitted light in the direction perpendicular to the light incident surface 11c of the light guide plate 11 (that is, in the YZ plane) can be narrowed. In other words, the light L emitted from the emission surface 11a of the light guide plate can be emitted with high directivity in the ⁇ direction in the YZ plane.
  • the reflection surface l ib in order for the light guide plate 11 to have such an action, the reflection surface l ib must be completely flat.
  • the following problems in making the reflecting surface l ib completely flat That is, as shown in FIG. 2, when there is a difference in brightness in the luminance distribution of light incident on the side surface 13d of the condenser 13 from the LED 12, if the reflecting surface l ib is a perfectly flat surface, the optical path P1 ( The arrangement relationship between the bright part) and the optical path P2 (dark part) is reflected as it is as a difference in brightness of the outgoing light from the outgoing surface 11a, which causes uneven brightness.
  • FIG. 1 (c) there are provided a plurality of prisms 16 extending in the X direction rather than making the reflecting surface l ib a complete flat surface. is there.
  • the light incident on the light guide plate 11 is slightly diffused in the YZ plane in the process of repeated reflection between the exit surface 11a and the reflection surface l ib, and therefore the optical path shown in FIG.
  • Luminance unevenness such as Pl and P2 can be eliminated.
  • it is desirable that the unevenness of luminance by the multi-row prism 16 is balanced to the extent that the height and directivity of the emitted light described above are not impaired.
  • each prism 16 having a cylindrical cross section.
  • the reflecting surface l ib of the light guide plate 11 has a certain degree of diffusivity, so that the region on the light incident surface 11c side of the light exit surface 11a (shown in FIG. 1 (b)).
  • the area B may be covered with a reflector similar to the reflector 15. Further, in the present embodiment, as shown in FIG.
  • the force that the multiple prisms 16 are provided on the entire reflection surface l ib of the light guide plate 11 is not necessarily the reflection surface 16
  • the object can be achieved even if the light guide plate 11 is provided only in the region on the light incident surface 11c side of the reflective surface l ib.
  • the LED 12 is disposed on the side surface 13d of the light collector 13, and the emitted light P from the LED 12 is emitted radially and collected. It is incident on the light body 13.
  • the linear Fresnel lens 14 including a prism group extending in the thickness direction of the light guide plate 11 is provided on the side surface 13 c of the light collector 13. Since the width d is approximately equal to the focal length of the linear Fresnel lens 14, the light P emitted radially from the LED force is also refracted and collected (in the XY plane) by the action of the linear Fresnel lens 14, Light almost parallel as seen in the front view of Fig.
  • the multiple prisms 16 formed on the reflection surface l ib of the light guide plate 11 extend in the X direction, they do not affect the characteristics of this light distribution in the XZ plane.
  • the light emitted from the light guide plate 11 is transmitted in a predetermined direction from the light emission surface l la of the light guide plate 11 (that is, the ⁇ direction in the YZ plane). In this case, the peak value of the luminance distribution in that direction is increased.
  • planar lighting device 20 in the second embodiment of the present invention will be described with reference to FIG.
  • the same or similar parts as those in the first embodiment described above will be referred to with the same reference numerals, and the description of the overlapping parts will be omitted as appropriate, and the differences will be described.
  • FIG. 3 is a side view showing a main part of the planar illumination device 20 in the present embodiment.
  • the planar illumination device 20 has basically the same configuration and function as the planar illumination device 10 described above, and only the point that the prism sheet 17 is disposed on the light emission surface l la of the light guide plate 11 is used. Are different.
  • the prism sheet 17 is formed by forming multiple triangular prisms on the one surface 17a side, and the direction in which the triangular prisms extend depends on the length of the light incident surface 11c of the light guide plate 11.
  • the prism surface 17a on which the triangular prism is formed is arranged so as to face the emitting surface lla of the light guide plate 11 so as to coincide with the direction (X direction).
  • Such a prism sheet 17 emits only the emission direction of the light emitted from the light guide plate 11 without spreading the light distribution in the vertical direction (in the YZ plane) and the horizontal direction (in the XZ plane). It is transformed so as to be substantially perpendicular to the plane l la.
  • the emission angle ⁇ of the emitted light L can be controlled in accordance with the apex angle ⁇ of the triangular prism included in the prism sheet 17 and the inclination angle ⁇ of the light guide plate 11.
  • the degree of design freedom increases. Is.
  • the prism sheet 17 does not necessarily cover the entire exit surface 11a of the light guide plate 11.
  • the region B on the light incident surface 11c side of the light guide plate 11 has a B force total reflection, so that the propagation light is closed inside. If it is trapped and does not function as a substantial light exit surface, it may be covered except for region B. Further, as in the first embodiment described above, when leakage light is generated from this region B, a reflector may be arranged.
  • FIG. 4 is a cross-sectional view showing a main part of the light source unit 30 in the third embodiment of the present invention.
  • the light source unit 30 in the present embodiment includes a liquid crystal panel 33 and the planar lighting device 10 in the first embodiment disposed behind the liquid crystal panel 33. Further, the planar lighting device 10 is disposed in the housing 35 together with the aluminum plate 31 for heat dissipation, and the aluminum plate 31 is coupled to a radiator 32 that is partially exposed to the outside. Further, the liquid crystal panel 33 assembled to the support 34 disposed on the front surface of the housing 35 is a well-known light modulation means that holds liquid crystal between a pair of substrates on which electrodes are formed. The light source unit 30 generates image information O by irradiating the liquid crystal panel 33, which is a light modulation means, with the planar illumination device 10 from behind.
  • the planar illumination device 10 functions as an illumination device having sufficient front luminance due to the high directivity of the emitted light
  • the light source unit 30 is, for example, an in-vehicle head. It can be suitably used as a light source for an up display.
  • the head-up display can be reduced in size and power consumption, and the heat dissipating means can be naturally air-cooled by the radiator 32, so that the heat dissipating means can be simplified.
  • FIG. 5 is a cross-sectional view showing a main part of the light source unit 40 in the fourth embodiment of the present invention.
  • the light source unit 40 in the present embodiment includes a liquid crystal panel 33 and the planar lighting device 20 in the third embodiment disposed behind the liquid crystal panel 33. Also planar lighting The device 20 is disposed in a housing 45 together with an aluminum plate 31 for heat dissipation, and the aluminum plate 31 is coupled to a radiator 32 that is partially exposed to the outside.
  • the liquid crystal panel 33 assembled to the support 34 disposed on the front surface of the housing 45 is a well-known light modulation unit that holds liquid crystal between a pair of substrates on which electrodes are formed.
  • the light source unit 40 generates image information O by irradiating the liquid crystal panel 33, which is a light modulation means, with the planar illumination device 20 from behind.
  • the light source unit 40 in the present embodiment has the same effect as the light source unit 30 described above.
  • the planar illumination device 20 includes the prism sheet 17 and emits emitted light. Since the angle ⁇ is converted in a direction substantially perpendicular to the exit surface 11a of the light guide plate 11, the housing 45 can be further downsized.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Liquid Crystal (AREA)

Abstract

Dispositif d'éclairage de surface ayant une luminance frontale élevée bien qu'utilisant une DEL et ayant une excellente uniformité de luminance, et unité de source de lumière utilisant le dispositif d’éclairage de surface. Le dispositif d'éclairage de surface (10) comprend une plaque de guidage de lumière (11) ayant une section en forme de cale avec son épaisseur diminuant progressivement depuis une surface d’extrémité latérale (surface d'entrée de lumière) (11c) sur un côté d’extrémité de base vers une surface d’extrémité latérale (11d) sur un côté d’extrémité d’inclinaison, et une DEL (12) disposée pour faire face à la surface d'entrée de lumière (11c) de la plaque de guidage de lumière (11), et un collecteur (13) interposé entre la surface d'entrée de lumière (11c) de la plaque de guidage de lumière (11) et la DEL (12) avec l’une de ses surfaces latérales (13c) faisant face à la surface d'entrée de lumière (11c) de la plaque de guidage de lumière (11) et l’autre surface latérale (13d) sur le côté opposé de la surface latérale (13c) faisant face à la DEL (12), une lentille de Fresnel linéaire (14) consistant en un groupe prismatique s’étendant dans le sens de l'épaisseur de la plaque de guidage de lumière (11) étant disposée sur la surface latérale (13c) faisant face à la surface d'entrée de lumière (11c) de la plaque de guidage de lumière (11), et un prisme à rayures multiples (16) s'étendant pratiquement en parallèle à la direction longitudinale de la surface d'entrée de lumière (11c) étant disposé sur la surface de réflexion(11b) de la plaque de guidage de lumière (11).
PCT/JP2006/317991 2005-09-09 2006-09-11 Dispositif d’éclairage de surface et unité de source de lumière utilisant celui-ci WO2007029858A1 (fr)

Applications Claiming Priority (2)

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JP2005-261978 2005-09-09
JP2005261978A JP2007073469A (ja) 2005-09-09 2005-09-09 面状照明装置及びそれを用いた光源ユニット

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JP7146965B2 (ja) * 2021-01-13 2022-10-04 マクセル株式会社 光源装置およびそれを利用した電子装置
US20230093382A1 (en) * 2021-09-20 2023-03-23 Lumileds Llc Optical coupler, design method therefor, and vehicle light therewith

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CN103982861A (zh) * 2014-06-04 2014-08-13 骏熠电子科技(昆山)有限公司 一种手机用发光体
CN109642707A (zh) * 2016-09-12 2019-04-16 麦克赛尔株式会社 光源装置
CN113740976A (zh) * 2020-05-29 2021-12-03 Oppo广东移动通信有限公司 光学模组及电子设备
CN113740976B (zh) * 2020-05-29 2023-04-21 Oppo广东移动通信有限公司 光学模组及电子设备

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