WO2008015887A1 - Dispositif d'éclairage et appareil d'imagerie - Google Patents

Dispositif d'éclairage et appareil d'imagerie Download PDF

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Publication number
WO2008015887A1
WO2008015887A1 PCT/JP2007/063780 JP2007063780W WO2008015887A1 WO 2008015887 A1 WO2008015887 A1 WO 2008015887A1 JP 2007063780 W JP2007063780 W JP 2007063780W WO 2008015887 A1 WO2008015887 A1 WO 2008015887A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
condenser lens
light
aspherical
lens
Prior art date
Application number
PCT/JP2007/063780
Other languages
English (en)
Japanese (ja)
Inventor
Toyohiko Mizota
Masashi Matono
Original Assignee
Yoshikawa Kasei 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 Yoshikawa Kasei Co., Ltd. filed Critical Yoshikawa Kasei Co., Ltd.
Publication of WO2008015887A1 publication Critical patent/WO2008015887A1/fr

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
    • G03B2215/0567—Solid-state light source, e.g. LED, laser
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0589—Diffusors, filters or refraction means
    • G03B2215/0592—Diffusors, filters or refraction means installed in front of light emitter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

Definitions

  • Illumination device and imaging device are Illumination device and imaging device
  • the present invention relates to a lighting device using an LED (Light Emitting Diode) and an imaging device technology using the lighting device.
  • LED Light Emitting Diode
  • Patent Document 1 discloses a technique for reducing color unevenness.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2003-16808
  • Patent Document 2 As a technique for preventing the occurrence of color unevenness, as shown in Patent Document 2, it is common to use a light diffusion sheet.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2004-45471
  • the color of irradiation light as a lighting device can be realized by only a single LED V. This is because the structure is simple and the cost can be reduced.
  • the technique described in Patent Document 1 is based on the premise that a plurality of LEDs are used, and is not suitable as a technique for suppressing the occurrence of color unevenness in a lighting device composed of only a single LED. It cannot be used for lighting devices that use a single LED.
  • the technique described in Patent Document 2 has an insufficient aspect of a technique using a light diffusion sheet as a technique for eliminating the uneven illumination of the LED and not reducing the illuminance.
  • the problem to be solved by the present invention is to provide a lighting device capable of realizing a desired color of irradiation light with only a single LED, and suppressing color unevenness without reducing illuminance, and an imaging apparatus using the same. It is to provide.
  • the object of the invention according to claim 1 to claim 3 is that the desired color of the irradiation light can be realized by only a single LED, and the color unevenness can be suppressed without reducing the illuminance. It is to provide lighting equipment.
  • the object of the invention described in claim 4 is to provide an imaging device using an illuminating device that can realize a desired color of irradiating light with only a single LED and can suppress uneven color without reducing illuminance. It is to provide.
  • the invention according to claim 1 relates to an illuminating device that irradiates a light beam emitted from an LED by collecting the light beam with two condenser lenses.
  • the base substrate (50) to which the power supply member is fixed the LED (ll) mounted on the base substrate (50), and the first aspherical surface disposed on the opposite side of the LED (ll).
  • the first condenser lens (40) is characterized by containing 0.01 to 1% by weight of a light diffusing agent with respect to the synthetic resin raw material.
  • LED is not limited to a blue light emitting diode.
  • it includes a composite LED with RGB in one package.
  • the “light diffusing agent” known ones are employed. 0.0.01% by weight or less It is unreasonable because it cannot mix colors. On the other hand, if it is 1.0% by weight or more, the illuminance decreases, which is unreasonable.
  • the first condenser lens (20) has a light diffusing action, the light diffusing sheet necessary in the prior art can be omitted. This simplifies the structure and assembly process of the lighting device.
  • the “light diffusion sheet” has a performance of diffusing to a predetermined angle (for example, 60 degrees) when parallel light is incident.
  • the material is polycarbonate, for example.
  • the invention according to claim 2 also relates to an illuminating device that irradiates a light beam emitted from an LED by condensing the light beam by two condensing lenses.
  • the base substrate (50) to which the power supply member is fixed the LED (ll) mounted on the base substrate (50), and the first aspherical surface disposed on the opposite side of the LED (ll).
  • a condenser lens (20), and an aspherical second condenser lens (40) disposed on the opposite side of the LED (ll) with respect to the first condenser lens (20) The second condenser lens (40) is characterized in that the light diffusing agent is contained in an amount of 0.01 to 1% by weight with respect to the synthetic resin raw material.
  • the second condenser lens (40) since the second condenser lens (40) has a light diffusing action, a light diffusing sheet that is necessary in the prior art can be omitted. This simplifies the structure and assembly process of the lighting device.
  • One of the first condenser lens (20) and the second condenser lens (40) is characterized in that a condenser lens containing no light diffusing agent is colored.
  • the invention according to claim 4 relates to an imaging device that employs the LED lighting device according to claims 1 to 3.
  • Examples of the "imaging device” include a digital camera and a mobile phone with a camera function.
  • the imaging device can use an illumination device with little color unevenness as auxiliary light, it contributes to improving the quality of a captured image.
  • an LED lighting device that can realize a desired color of irradiation light with only a single LED and can suppress color unevenness without reducing illuminance. could be provided.
  • an imaging device using an illumination device that can realize a desired color of irradiation light with only a single LED and can suppress uneven color without reducing illuminance. Delivered with power S.
  • FIG. 1 is a side sectional view showing a lighting device according to a first embodiment.
  • FIG. 2 is a side sectional view showing a lighting device according to a second embodiment.
  • Lens holder 70 A Lens holder
  • FIG. 1 is a side sectional view showing the lighting apparatus according to the first embodiment.
  • FIG. 2 is a side sectional view showing the lighting apparatus according to the second embodiment.
  • the illuminating device 10 condenses the incident light beam from the LED 11 (light source) by a plurality of condensing lenses 20 and 40 having different shapes, and is irradiated as an emitted light beam having a different light distribution. It is an illuminating device for irradiating a body (located in the upper part in the figure).
  • a cylindrical inner sleeve 80 having an inner diameter dimension of the lens holder 70 as an outer dimension is interposed between the first condenser lens 20 and the second condenser lens 40. Further, a ring-shaped outer sleeve 90 having an inner diameter dimension of the lens holder 70 as an outer dimension is fixed to the anti-first condenser lens 20 side of the second condenser lens 40.
  • the first condenser lens 20 contains 0.01 to 1% by weight of a light diffusing agent with respect to the synthetic resin raw material.
  • the second condenser lens 40 is colored.
  • a coloring method a dye that enables desired coloring to the synthetic resin is used. The reason for coloring is that light different from the color emitted by the LED 11 may be desired.
  • the condensing lens that does not contain a light diffusing agent can meet the demand. In the case of white, it is not colored. [0029] According to the embodiment as described above, the irradiation unevenness can be eliminated without reducing the illuminance. In addition, since the first condensing lens 20 has a light diffusing action, a light diffusing sheet that is necessary in the prior art can be omitted. This simplifies the structure of the lighting device and the assembly process.
  • a light diffusing agent may be contained in the synthetic resin raw material that is the material of the second condenser lens 40. Even in that case, the irradiation unevenness can be eliminated without reducing the illuminance.
  • the first condenser lens 20 is colored.
  • the base substrate 50 is made of a metal material such as metal. For this reason, the heat is stored in the interior of the LED 11, and the heat dissipation efficiency is such that the heat is efficiently dissipated to the outside.
  • the LED11 adopts 1W noise power LED.
  • the LED11 has a rectangular parallelepiped shape that is 2.8mm long, 3.4mm wide, and 1.15mm high. Further, light beams having substantially the same light distribution angle (for example, directivity (full width at half maximum) standard value of about 120 °) are emitted toward the first condenser lens 20 side.
  • the installation location is arranged at the center of the upper surface 51 of the base substrate 50.
  • the LED 11 in the present embodiment employs a white LED, and is formed as an LED capable of realizing white light with a blue LED chip (not shown) and a yellow phosphor. For this reason, the irradiated light is white light.
  • the condensing lenses 20 and 40 are held by a ring-shaped inner sleeve 80 and an outer sleeve 90 inside a cylindrical lens holder 70.
  • the lens holder 70, the inner sleeve 80, and the outer sleeve 90 are each formed of a metal material such as aluminum. For this reason, it is a material that promotes heat dissipation so that the heat stored inside by LED11 can be efficiently dissipated to the outside. [0034] (Condenser lens)
  • the first condenser lens 20 has a flat surface on the LED 11 side and a convex surface on the anti-LED 11 side. This convex surface has an aspherical shape, and effectively condenses the light flux from the LED.
  • the second condenser lens 40 has a surface on the first condenser lens 20 side and an anti-first condenser lens 20 side. The surface is also convex. Both the convex surface on the first condensing lens 20 side and the convex surface on the anti-first condensing lens 20 side are aspherical and effectively collect the light flux from the LED.
  • the second embodiment employs the light diffusion sheet 30 without mixing a light diffusing agent in the production of the first condenser lens 20A and the second condenser lens 40A.
  • the light diffusion sheet 30 in the present embodiment uses a sheet that diffuses and emits at about 60 ° when an incident light beam from the LED 11A is incident as parallel light.
  • the height of the light diffusion sheet was about 0.25 mm, the diameter was 8.4 mm, and the circumference was 26.39 mm.
  • the distance from the LED 11A to the light diffusion sheet 30 is 0.95 mm.
  • the distance from the upper surface of the light diffusion sheet 30 to the bottom of the inner lens 20A is 0.68 mm.
  • the distance from the top of the first condenser lens 20A to the bottom of the second condenser lens 40A is 0.1 mm.
  • Examples of the material of the first condenser lens 20A and the second condenser lens 40A include translucent resins such as acrylic, COP (cycloolefin polymer), and COC (cycloolefin copolymer). A heat resistant resin or the like can be used.
  • Either or both of the first condenser lens 20A and the second condenser lens 40A contain a colorant to produce a desired light color.
  • Each lens contains a light diffusing agent, so it can be colored freely.
  • the spot of the light irradiated to the irradiated object and the edge thereof become very “clear” spot light.
  • the light distribution can be uniformly controlled by the diffusion sheet 30, uneven color and uneven illumination are reduced.
  • LED11 and LED11A in this embodiment have shown the example which employ
  • the present invention does not include ultraviolet rays, the present invention is most suitable as illumination in an object that dislikes ultraviolet light (for example, exhibits in museums and museums), hospitals, and the like.
  • the present invention is also suitable for illuminating fine arts and products.
  • the boundary between the illumination surface and the non-illumination surface (edge) enables clear illumination, it is also suitable for reading lamps where diffuse light to the surroundings becomes a problem.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Led Device Packages (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

La présente invention concerne un dispositif d'éclairage par LED qui permet d'éliminer une non-uniformité de couleur avec une configuration simple. Le dispositif d'éclairage par LED comprend un substrat de base (50) sur lequel est fixé un élément d'alimentation électrique, une LED (11) montée sur le substrat de base (50), une première lentille asphérique collectrice de lumière (20) disposée sur un côté opposé à la LED (11) et une seconde lentille asphérique collectrice de lumière (40) disposée sur la première (20) sur un côté opposé à la LED (11). La première lentille collectrice de lumière (40) contient un agent diffuseur de lumière dans une proportion en masse de 0,01 à 1 % d'un matériau de résine synthétique de cette lentille.
PCT/JP2007/063780 2006-07-31 2007-07-11 Dispositif d'éclairage et appareil d'imagerie WO2008015887A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006209235A JP2008034321A (ja) 2006-07-31 2006-07-31 照明装置および撮像装置
JP2006-209235 2006-07-31

Publications (1)

Publication Number Publication Date
WO2008015887A1 true WO2008015887A1 (fr) 2008-02-07

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Application Number Title Priority Date Filing Date
PCT/JP2007/063780 WO2008015887A1 (fr) 2006-07-31 2007-07-11 Dispositif d'éclairage et appareil d'imagerie

Country Status (2)

Country Link
JP (1) JP2008034321A (fr)
WO (1) WO2008015887A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010239021A (ja) * 2009-03-31 2010-10-21 Koha Co Ltd 光源モジュール
JP2013140804A (ja) * 2011-10-11 2013-07-18 Posco Led Co Ltd 光半導体照明装置
GB2517432A (en) * 2013-08-19 2015-02-25 Jitendra Makvana A light diffuser
WO2017153539A1 (fr) * 2016-03-10 2017-09-14 Osram Opto Semiconductors Gmbh Optique de projection, puce semiconductrice optoélectronique, système d'éclairage optoélectronique, caméra, terminal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101041960B1 (ko) * 2008-08-14 2011-06-16 주식회사 루미맥스테크놀러지 파워 ｌｅｄ를 구비하는 램프 장치
KR100996912B1 (ko) * 2010-02-19 2010-11-29 제디아 주식회사 다양한 컬러의 엘이디를 이용한 조명장치
CN103244871B (zh) * 2013-04-28 2015-07-01 京东方科技集团股份有限公司 直下式背光模组、液晶显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61158606A (ja) * 1984-12-28 1986-07-18 株式会社小糸製作所 照明装置
JP2002260422A (ja) * 2001-02-28 2002-09-13 Ricoh Co Ltd Ｌｅｄ光源装置
JP2005208571A (ja) * 2003-12-22 2005-08-04 Seiko Epson Corp 照明装置及びプロジェクタ
JP2006073250A (ja) * 2004-08-31 2006-03-16 Harison Toshiba Lighting Corp 照明装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005259593A (ja) * 2004-03-12 2005-09-22 Mitsubishi Engineering Plastics Corp Ｌｅｄ信号機用レンズ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61158606A (ja) * 1984-12-28 1986-07-18 株式会社小糸製作所 照明装置
JP2002260422A (ja) * 2001-02-28 2002-09-13 Ricoh Co Ltd Ｌｅｄ光源装置
JP2005208571A (ja) * 2003-12-22 2005-08-04 Seiko Epson Corp 照明装置及びプロジェクタ
JP2006073250A (ja) * 2004-08-31 2006-03-16 Harison Toshiba Lighting Corp 照明装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010239021A (ja) * 2009-03-31 2010-10-21 Koha Co Ltd 光源モジュール
US9166127B2 (en) 2009-03-31 2015-10-20 Koha Co., Ltd. Light source module
JP2013140804A (ja) * 2011-10-11 2013-07-18 Posco Led Co Ltd 光半導体照明装置
GB2517432A (en) * 2013-08-19 2015-02-25 Jitendra Makvana A light diffuser
GB2517432B (en) * 2013-08-19 2015-07-01 Jitendra Makvana A light diffuser
WO2017153539A1 (fr) * 2016-03-10 2017-09-14 Osram Opto Semiconductors Gmbh Optique de projection, puce semiconductrice optoélectronique, système d'éclairage optoélectronique, caméra, terminal
US11177415B2 (en) 2016-03-10 2021-11-16 Osram Oled Gmbh Projection optical unit, optoelectronic semiconductor chip, optoelectronic illumination system, camera, terminal

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