JP2008091238A - Led lamp - Google Patents

Led lamp Download PDF

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JP2008091238A
JP2008091238A JP2006271597A JP2006271597A JP2008091238A JP 2008091238 A JP2008091238 A JP 2008091238A JP 2006271597 A JP2006271597 A JP 2006271597A JP 2006271597 A JP2006271597 A JP 2006271597A JP 2008091238 A JP2008091238 A JP 2008091238A
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led
illuminating
illumination
led lamp
light
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JP4595914B2 (en
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Masahide Muto
正英 武藤
Yoshiyuki Uchinono
良幸 内野々
Hiroyuki Yoshida
浩之 吉田
Takashi Shindo
崇 進藤
Masahiro Sato
正博 佐藤
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Matsushita Electric Works Ltd
松下電工株式会社
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/20Light sources with three-dimensionally disposed light-generating elements on convex supports or substrates, e.g. on the outer surface of spheres
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/40Light sources with three-dimensionally disposed light-generating elements on the sides of polyhedrons, e.g. cubes or pyramids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lamp which realizes direct illumination and indirect illumination, using a single light source. <P>SOLUTION: The LED lamp illuminating a given illuminating range includes an insulating base material 1, having a main surface 1a substantially facing a given illuminating range, and a tapered surface 1b which is formed at the back of the main surface 1a to give a prescribed taper and is invisible from the given illuminating range. The insulating base material 1 is provided with a directly illuminating LED 4a, disposed on the main surface 1a of the insulating base material 1, with the taper surface 1b, and with a circuit pattern 5 formed on the insulating base material 1 that supplies power to the directly illuminating LED 4a and an indirectly illuminating LED 4b. An LED light, emitted from the indirectly illuminating LED 4b is, made incident on a reflector 3 and is reflected by the reflector 3 toward the prescribed illuminating range. The LED lamp offers direct illumination and indirect illumination as the directly illuminating LED 4a, and the indirectly illuminating LED 4b are selectively driven. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、発光ダイオード(Light Emitted Diode;以下、LEDという。)を立体的な絶縁性基材に実装したLEDランプに関する。   The present invention relates to an LED lamp in which a light emitting diode (hereinafter referred to as LED) is mounted on a three-dimensional insulating substrate.
従来より、長寿命のLEDを光源として使用したLEDランプが知られている(特許文献1参照)。このLEDランプは、図3に示すように、筒状部材の上面に設けられたLED101と、筒状部材の側面に設けられたLED102と、LED102から出射された光を反射する反射鏡103とを備えている。このようなLEDランプは、LED101及びLED102を同時に駆動させている。   Conventionally, an LED lamp using a long-life LED as a light source is known (see Patent Document 1). As shown in FIG. 3, the LED lamp includes an LED 101 provided on the upper surface of the cylindrical member, an LED 102 provided on a side surface of the cylindrical member, and a reflecting mirror 103 that reflects light emitted from the LED 102. I have. Such an LED lamp drives the LED 101 and the LED 102 simultaneously.
また、このLEDランプによれば、複数のLED102を椀状の反射鏡103内の縮径端部側(ランプ根本側)に配設する一方、点灯回路基板104をLED102よりも投光端側へ配設しているので、反射鏡103の縮径端部側面をLED102からの光の反射に有効に利用することができ、LED101とLED102とを同時に点灯させた時の効率を高めることができるとしている。
特開平9−265807号公報
In addition, according to this LED lamp, the plurality of LEDs 102 are arranged on the reduced diameter end side (lamp base side) in the bowl-shaped reflecting mirror 103, while the lighting circuit board 104 is closer to the light projecting end side than the LEDs 102. Since it is disposed, the side surface of the reduced diameter end portion of the reflecting mirror 103 can be used effectively for the reflection of light from the LED 102, and the efficiency when the LED 101 and the LED 102 are turned on simultaneously can be increased. Yes.
JP 9-265807 A
しかしながら、上述したLEDランプでは、LED101と同じ出射範囲における直接光の効率を高くするために反射鏡103とLED102との位置関係を工夫した構成であるために、直接照明と間接照明を単一の光源にて切り換えて実現することは想定されていない。   However, since the LED lamp described above has a configuration in which the positional relationship between the reflecting mirror 103 and the LED 102 is devised in order to increase the efficiency of direct light in the same emission range as the LED 101, a single direct illumination and indirect illumination are provided. It is not assumed to be realized by switching with a light source.
また、特許文献1に記載されたLEDランプの構成によって直接照明と間接照明とを実現しようとした場合、図3及び特許文献1の図2等より、筒状部材の側面に設けられたLED102の側面から直接的に光が出射されてしまうために、間接照明を実現できない問題がある。   Moreover, when it is going to implement | achieve direct illumination and indirect illumination with the structure of the LED lamp described in patent document 1, from FIG. 2, FIG. 2, etc. of patent document 1, etc. of LED102 provided in the side surface of the cylindrical member Since light is directly emitted from the side surface, there is a problem that indirect illumination cannot be realized.
そこで、本発明は、上述した実情に鑑みて提案されたものであり、単一の光源によって直接照明と間接照明とを実現できるLEDランプを提供することを目的とする。   Then, this invention is proposed in view of the above-mentioned situation, and it aims at providing the LED lamp which can implement | achieve direct illumination and indirect illumination with a single light source.
本発明は、所定の照射範囲に向けて照明をするLEDランプであって、上述の課題を解決するために、所定の照射範囲と略対向した主面と、当該主面の背面側に所定のテーパを以て形成されて所定の照射範囲から視認不能なテーパ面とを有する立体状の絶縁性基材に、絶縁性基材の主面に設けられた第1LED群と、テーパ面に設けられた第2LED群と、絶縁性基材に形成されて第1LED群および第2LED群に給電をする回路パターンを設け、反射板によって、第2LED群から出射されたLED光が入射されて、所定の照射範囲に向けて反射する。このようなLEDランプは、第1LED群と第2LED群とを選択的に駆動して、直接照明及び間接照明を単一の光源で実現する。   The present invention is an LED lamp that illuminates toward a predetermined irradiation range, and in order to solve the above-described problem, a main surface substantially opposed to the predetermined irradiation range and a predetermined surface on the back side of the main surface A three-dimensional insulating base material having a tapered surface that is formed with a taper and is not visible from a predetermined irradiation range, a first LED group provided on the main surface of the insulating base material, and a first LED provided on the tapered surface. 2 LED groups and a circuit pattern that is formed on an insulating substrate and feeds power to the first LED group and the second LED group are provided, and the LED light emitted from the second LED group is incident by the reflector, and a predetermined irradiation range Reflect towards Such an LED lamp selectively drives the first LED group and the second LED group to realize direct illumination and indirect illumination with a single light source.
本発明によれば、絶縁性基材の主面に設けた第1LED群とテーパ面に設けた第2LED群とを備え、テーパ面を所定の照射範囲から視認不能としたので、間接照明光が所定の照射範囲から直接的に視認されることがない。このようなLEDランプによれば、直接照明時には第1LED群のみを点灯させ、間接照明時には第2LED群のみを点灯させることによって、直接照明と間接照明とを単一の光源で実現できる。   According to the present invention, the first LED group provided on the main surface of the insulating substrate and the second LED group provided on the tapered surface are provided, and the tapered surface is made invisible from a predetermined irradiation range. It is not directly visible from a predetermined irradiation range. According to such an LED lamp, direct lighting and indirect lighting can be realized with a single light source by lighting only the first LED group during direct illumination and lighting only the second LED group during indirect lighting.
以下、本発明の実施の形態について図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.
本発明は、例えば図1に示すように構成されたLEDランプに適用される。   The present invention is applied to, for example, an LED lamp configured as shown in FIG.
このLEDランプは、ランプ前面の所定の照射範囲に向けて照明をするLEDランプであり、直接照明と間接照明との双方を単一の光源で実現するものである。具体的には、図1に示すように、LEDランプは、所定の照射範囲と略対向した主面1aと、当該主面1aの背面側に所定のテーパを以て形成されて所定の照射範囲から視認不能なテーパ面1bと、支持部1cを有する立体状の絶縁性基材1の支持部1cが回路基板2に接続されている。この支持部1cには、光を反射する反射材料が形成された反射鏡3が接続されている。   This LED lamp is an LED lamp that illuminates toward a predetermined irradiation range on the front surface of the lamp, and realizes both direct illumination and indirect illumination with a single light source. Specifically, as shown in FIG. 1, the LED lamp is formed with a main surface 1a substantially opposite to a predetermined irradiation range and a predetermined taper on the back side of the main surface 1a so that the LED lamp is visible from the predetermined irradiation range. An incapable taper surface 1b and a support portion 1c of a three-dimensional insulating base material 1 having a support portion 1c are connected to the circuit board 2. The support part 1c is connected to a reflecting mirror 3 on which a reflective material that reflects light is formed.
絶縁性基材1は、ポリイミド、ABS、ポリエーテルイミド、液晶ポリマー、アルミナセラミックス等の電気絶縁材料によって形成したものを用いることができる。また、絶縁性基材1の形成法としては、射出成形、プレス成形などで所望の立体形状とされる。   The insulating substrate 1 can be made of an electrically insulating material such as polyimide, ABS, polyetherimide, liquid crystal polymer, alumina ceramics or the like. Moreover, as a formation method of the insulating base material 1, it is set as desired three-dimensional shape by injection molding, press molding, etc.
LEDランプは、更に、絶縁性基材1の主面1aに設けられた直接照明用LED4a(第1LED群)と、テーパ面1bに設けられた間接照明用LED4b(第2LED群)とを備える。テーパ面1bは、当該テーパ面1bに設けられた間接照明用LED4bが所定の照射範囲から視認不能となるように主面1aに対する角度となっている。   The LED lamp further includes a direct illumination LED 4a (first LED group) provided on the main surface 1a of the insulating substrate 1 and an indirect illumination LED 4b (second LED group) provided on the tapered surface 1b. The taper surface 1b has an angle with respect to the main surface 1a so that the indirect illumination LED 4b provided on the taper surface 1b is not visible from a predetermined irradiation range.
間接照明用LED4bから出射された光(以下、間接照明光と呼ぶ。)反射鏡3に入射されて、所定の照射範囲に向けて反射される。直接照明用LED4aは、所定の照射範囲に直接的に光(以下、直接照明光と呼ぶ。)を出射する。テーパ面1bに間接照明用LED4bが設けられることにより、間接照明用LED4bから出射された間接照明光は、所定の照射範囲から直接的に視認不能となっており、反射鏡3dで反射した間接照明光のみが所定の照射範囲に向かう。   Light emitted from the LED 4b for indirect illumination (hereinafter referred to as indirect illumination light) is incident on the reflecting mirror 3 and reflected toward a predetermined irradiation range. The direct illumination LED 4a directly emits light (hereinafter referred to as direct illumination light) to a predetermined irradiation range. By providing the indirect illumination LED 4b on the tapered surface 1b, the indirect illumination light emitted from the indirect illumination LED 4b is not directly visible from a predetermined irradiation range, and is reflected by the reflecting mirror 3d. Only light goes to the predetermined illumination range.
回路基板2には、直接照明用LED4a及び間接照明用LED4bの駆動回路が設けられている。回路基板2と直接照明用LED4a及び間接照明用LED4bとは、絶縁性基材1上に形成された回路パターン5で電気的に接続されている。この回路パターン5によって、直接照明用LED4a及び間接照明用LED4bの給電が行われる。この回路パターン5は、絶縁性基材1の表面にめっき用触媒、めっき用触媒の化合物、金属膜などのようなめっき下地層を形成し、絶縁性基材1の回路部と非回路部の境界領域にレーザ等の電磁波を照射してめっき下地層を除去した後、残っているめっき下地層のうち回路パターン5となるめっき下地層部分にめっきを施して作成される。   The circuit board 2 is provided with driving circuits for the direct illumination LED 4a and the indirect illumination LED 4b. The circuit board 2 and the direct illumination LED 4 a and the indirect illumination LED 4 b are electrically connected by a circuit pattern 5 formed on the insulating base 1. The circuit pattern 5 supplies power to the direct illumination LED 4a and the indirect illumination LED 4b. The circuit pattern 5 is formed by forming a plating base layer such as a plating catalyst, a compound of the plating catalyst, a metal film, etc. on the surface of the insulating substrate 1. After the plating base layer is removed by irradiating an electromagnetic wave such as a laser to the boundary region, the plating base layer portion to be the circuit pattern 5 among the remaining plating base layer is plated.
回路基板2に設けられた駆動回路は、直接照明用LED4aと間接照明用LED4bとを選択的に駆動させる。このようなLEDランプは、所定の照射範囲(前方)に向けて直接照明光を出射する場合には、直接照明用LED4aのみを点灯させ、所定の照射範囲(前方)向けて間接照明光を出射する場合には間接照明用LED4bのみを点灯させる。   The drive circuit provided on the circuit board 2 selectively drives the direct illumination LED 4a and the indirect illumination LED 4b. When such an LED lamp emits direct illumination light toward a predetermined irradiation range (front), only the direct illumination LED 4a is turned on, and indirect illumination light is emitted toward the predetermined irradiation range (front). When doing so, only the indirect illumination LED 4b is turned on.
また、このLEDランプにおいて、図2に示すように、直接照明用LED4aは白色光を出射する複数のLEDからなるものとし、間接照明用LED4bは暖色光を出射する複数のLEDからなるものとしても良い。例えば間接照明用LED4bは黄色光を出射するものが使用可能である。   Further, in this LED lamp, as shown in FIG. 2, the direct illumination LED 4a may be composed of a plurality of LEDs that emit white light, and the indirect illumination LED 4b may be composed of a plurality of LEDs that emit warm color light. good. For example, the LED for indirect illumination 4b that emits yellow light can be used.
例えば、LEDランプを車両に設けた場合において、直接照明用LED4aを白色光を出射する前照灯として使用し、間接照明用LED4bを黄色光を出射するフォグランプとして使用できる。これにより、車両へのランプ搭載における省スペース化、デザイン性の向上を図ることができる。   For example, when an LED lamp is provided in a vehicle, the direct illumination LED 4a can be used as a headlamp that emits white light, and the indirect illumination LED 4b can be used as a fog lamp that emits yellow light. Thereby, it is possible to save space and improve design in mounting the lamp on the vehicle.
また、LEDランプを家庭用とした場合において、通常使用時には直接照明用LED4aのみを点灯させることとし、火災、防犯等の緊急事態を報知する時には間接照明用LED4bのみを点灯させることができる。この場合、間接照明用LED4bは赤色光を出射するLEDからなるものとすることが望ましい。これにより、家庭において警報ランプを別個に設ける必要がないので、デザイン性の向上を図ることができる。   Further, when the LED lamp is for home use, only the direct illumination LED 4a is turned on during normal use, and only the indirect illumination LED 4b can be turned on when an emergency such as a fire or crime prevention is notified. In this case, it is desirable that the indirect illumination LED 4b is an LED that emits red light. Thereby, since it is not necessary to provide a separate alarm lamp at home, the design can be improved.
以上詳細に説明したように、本発明を適用したLEDランプによれば、主面1aに設けた直接照明用LED4aとテーパ面1bに設けた間接照明用LED4bとを備え、テーパ面1bを所定の照射範囲から視認不能としたので、間接照明光が所定の照射範囲から直接的に視認されることがない。これにより、LEDランプによれば、直接照明時には直接照明用LED4aのみを点灯させ、間接照明時には間接照明用LED4bのみを点灯させることによって、直接照明と間接照明とを単一の光源で実現できる。また、単一のLEDランプで直接照明と間接照明とを切り換えることにより、直接照明ランプと間接照明ランプといったように用途によって複数のランプを設ける必要が無くなる。   As described above in detail, according to the LED lamp to which the present invention is applied, the LED 4a for direct illumination provided on the main surface 1a and the LED 4b for indirect illumination provided on the tapered surface 1b are provided. Since invisible illumination is not visible from the irradiation range, the indirect illumination light is not directly visible from the predetermined irradiation range. Thus, according to the LED lamp, only the direct illumination LED 4a is turned on during direct illumination, and only the indirect illumination LED 4b is turned on during indirect illumination, thereby realizing direct illumination and indirect illumination with a single light source. Further, by switching between direct illumination and indirect illumination with a single LED lamp, there is no need to provide a plurality of lamps depending on the application, such as a direct illumination lamp and an indirect illumination lamp.
なお、上述の実施の形態は本発明の一例である。このため、本発明は、上述の実施形態に限定されることはなく、この実施の形態以外であっても、本発明に係る技術的思想を逸脱しない範囲であれば、設計等に応じて種々の変更が可能であることは勿論である。   The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.
本発明を適用したLEDランプの断面図である。It is sectional drawing of the LED lamp to which this invention is applied. 本発明を適用したLEDランプにおいて、直接照明用LEDと間接照明用LEDとの相違の説明図である。In the LED lamp to which this invention is applied, it is explanatory drawing of the difference with LED for direct illumination, and LED for indirect illumination. 従来のLEDランプの断面図である。It is sectional drawing of the conventional LED lamp.
符号の説明Explanation of symbols
1 絶縁性基材
1a 主面
1b テーパ面
1c 支持部
2 回路基板
3 反射鏡
4a 直接照明用LED
4b 間接照明用LED
5 回路パターン
DESCRIPTION OF SYMBOLS 1 Insulating base material 1a Main surface 1b Tapered surface 1c Support part 2 Circuit board 3 Reflective mirror 4a LED for direct illumination
4b LED for indirect lighting
5 Circuit pattern

Claims (2)

  1. 所定の照射範囲に向けて照明をするLEDランプであって、
    前記所定の照射範囲と略対向した主面と、当該主面の背面側に所定のテーパを以て形成されて前記所定の照射範囲から視認不能なテーパ面とを有する立体状の絶縁性基材と、
    前記絶縁性基材の主面に設けられた第1LED群と、
    前記テーパ面に設けられた第2LED群と、
    前記第2LED群から出射されたLED光が入射されて、前記所定の照射範囲に向けて反射する反射板と、
    前記絶縁性基材に形成されて前記第1LED群および前記第2LED群に給電をする回路パターンとを備え、
    前記第1LED群と前記第2LED群とが選択的に駆動されることを特徴とするLEDランプ。
    An LED lamp that illuminates toward a predetermined irradiation range,
    A three-dimensional insulating base material having a main surface substantially opposed to the predetermined irradiation range, and a tapered surface formed with a predetermined taper on the back side of the main surface and invisible from the predetermined irradiation range;
    A first LED group provided on the main surface of the insulating substrate;
    A second LED group provided on the tapered surface;
    A reflector that receives the LED light emitted from the second LED group and reflects the light toward the predetermined irradiation range;
    A circuit pattern that is formed on the insulating substrate and feeds power to the first LED group and the second LED group;
    The LED lamp, wherein the first LED group and the second LED group are selectively driven.
  2. 前記第1LED群は白色光を出射する複数のLEDからなり、前記第2LED群は暖色光を出射する複数のLEDからなることを特徴とする請求項1に記載のLEDランプ。   2. The LED lamp according to claim 1, wherein the first LED group includes a plurality of LEDs that emit white light, and the second LED group includes a plurality of LEDs that emit warm color light.
JP2006271597A 2006-10-03 2006-10-03 LED lamp Active JP4595914B2 (en)

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WO2010007420A2 (en) * 2008-07-14 2010-01-21 Holicom Film Limited Method and system for filming
EP2177820A2 (en) 2008-09-30 2010-04-21 Toshiba Lighting & Technology Corporation Lighting apparatus
JP2010531037A (en) * 2007-08-10 2010-09-16 オスラム ゲゼルシャフト ミット ベシュレンクテル ハフツング Lighting device
CN101839410A (en) * 2010-04-15 2010-09-22 北京朗波尔光电股份有限公司 Space omnidirectional light-emitting diode (LED)
KR101202815B1 (en) 2011-03-31 2012-11-19 엠엔티(주) Reflective type led light device for dental surgery
KR200468298Y1 (en) 2012-01-27 2013-08-05 이영호 Rembrandt Light and LED lights with reflective light
CN103742843A (en) * 2014-01-20 2014-04-23 苏州鸿益丰光电有限公司 LED (light emitting diode) ceiling lamp in multiple-light-distributing mode and multiple-light-distributing method for LED ceiling lamp
CN104033802A (en) * 2014-06-25 2014-09-10 昆山天重星光电科技有限公司 Spotlight with light source at inner bottom of reflection cup
JP2015173448A (en) * 2008-07-14 2015-10-01 ホリコム フィルム リミテッド Method and system for filming

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JP2010531037A (en) * 2007-08-10 2010-09-16 オスラム ゲゼルシャフト ミット ベシュレンクテル ハフツング Lighting device
WO2010007420A2 (en) * 2008-07-14 2010-01-21 Holicom Film Limited Method and system for filming
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JP2011528133A (en) * 2008-07-14 2011-11-10 ホリコム フィルム リミテッド Imaging method and system
JP2015173448A (en) * 2008-07-14 2015-10-01 ホリコム フィルム リミテッド Method and system for filming
US9033522B2 (en) 2008-07-14 2015-05-19 Holicom Film Limited Method and system for filming
US10718994B2 (en) 2008-07-14 2020-07-21 Holicom Film Limited Method and system for filming
US8901848B2 (en) 2008-09-30 2014-12-02 Toshiba Lighting & Technology Corporation Lighting apparatus
EP2177820A2 (en) 2008-09-30 2010-04-21 Toshiba Lighting & Technology Corporation Lighting apparatus
CN101839410A (en) * 2010-04-15 2010-09-22 北京朗波尔光电股份有限公司 Space omnidirectional light-emitting diode (LED)
KR101202815B1 (en) 2011-03-31 2012-11-19 엠엔티(주) Reflective type led light device for dental surgery
KR200468298Y1 (en) 2012-01-27 2013-08-05 이영호 Rembrandt Light and LED lights with reflective light
CN103742843A (en) * 2014-01-20 2014-04-23 苏州鸿益丰光电有限公司 LED (light emitting diode) ceiling lamp in multiple-light-distributing mode and multiple-light-distributing method for LED ceiling lamp
CN104033802A (en) * 2014-06-25 2014-09-10 昆山天重星光电科技有限公司 Spotlight with light source at inner bottom of reflection cup

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