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JP2008034321A - Illumination device, and imaging apparatus - Google Patents

Illumination device, and imaging apparatus Download PDF

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Publication number
JP2008034321A
JP2008034321A JP2006209235A JP2006209235A JP2008034321A JP 2008034321 A JP2008034321 A JP 2008034321A JP 2006209235 A JP2006209235 A JP 2006209235A JP 2006209235 A JP2006209235 A JP 2006209235A JP 2008034321 A JP2008034321 A JP 2008034321A
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Japan
Prior art keywords
led
light
condenser lens
lens
condensing lens
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Pending
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JP2006209235A
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Japanese (ja)
Inventor
Toyohiko Mizota
豊彦 溝田
Masashi Matono
政志 的野
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Yoshikawa Kasei Co Ltd
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Yoshikawa Kasei Co Ltd
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Priority to JP2006209235A priority Critical patent/JP2008034321A/en
Priority to PCT/JP2007/063780 priority patent/WO2008015887A1/en
Publication of JP2008034321A publication Critical patent/JP2008034321A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05Combinations of cameras with electronic flash apparatus; Electronic flash units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/04Refractors for light sources of lens shape
    • F21V5/048Refractors 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
    • 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]
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2215/00Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05Combinations of cameras with electronic flash units
    • G03B2215/0564Combinations of cameras with electronic flash units characterised by the type of light source
    • G03B2215/0567Solid-state light source, e.g. LED, laser
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2215/00Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05Combinations of cameras with electronic flash units
    • G03B2215/0589Diffusors, filters or refraction means
    • G03B2215/0592Diffusors, filters or refraction means installed in front of light emitter
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10HINORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80Constructional details
    • H10H20/85Packages
    • H10H20/855Optical field-shaping means, e.g. lenses

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED illumination device capable of suppressing color unevenness and simplifying its structure. <P>SOLUTION: The LED illumination device is provided with a base substrate (50) to fix a power supply member, an LED (11) mounted on that base substrate (50), a first non-spherical shaped condensing lens (20) arranged on the side opposite to that LED (11), and a second non-spherical condensing lens (40) arranged on the side opposite to the LED (11) against that first condensing lens (20). The first condensing lens (40) contains 0.01 to 1 wt.% of a light diffusing agent against synthetic resin raw material made of that material quality. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、LED(Light Emitting Diode)を用いた照明装置およびその照明装置を用いた撮像装置の技術に関する。   The present invention relates to a lighting device using an LED (Light Emitting Diode) and an imaging device using the lighting device.

白熱灯や蛍光灯に比べ省電力でランニングコストが安い、また、蛍光灯のように水銀などの有害物質を使用していないなどの観点から、照明用途としてLEDに対する期待が大きい。
しかし、LEDを照明装置に用いる場合、高照度の実現は可能であるものの、照射面に色むらが発生するという問題があった。
From the viewpoints of power saving and low running cost compared to incandescent lamps and fluorescent lamps, and not using harmful substances such as mercury unlike fluorescent lamps, there are high expectations for LEDs for lighting applications.
However, when an LED is used in a lighting device, although high illuminance can be realized, there is a problem that color unevenness occurs on the irradiated surface.

上記の問題に対し、特許文献1では、色むらを低減させるための技術が開示されている。
すなわち、LEDからの放射光全てがレンズ部の所定部分に集中的に集光されてから外部に放射されるために、レンズ部内で十分に混色させることができるので、色むらの発生を防止できるという技術である。
With respect to the above problem, Patent Document 1 discloses a technique for reducing color unevenness.
That is, since all the emitted light from the LED is concentrated on a predetermined portion of the lens portion and then emitted to the outside, it is possible to sufficiently mix colors in the lens portion, thereby preventing color unevenness. It is a technology.

特開2003−16808号公報JP 2003-16808 A

一方、色むらの発生を防止する技術としては、特許文献2に示すように、光拡散シートを用いることが一般的である。   On the other hand, as a technique for preventing the occurrence of uneven color, it is common to use a light diffusion sheet as shown in Patent Document 2.

特開2004−45471号公報JP 2004-45471 A

さて、照明装置としての照射光の色は、単一のLEDのみで実現できるものが好ましい。構造がシンプルでコストも抑えられるからである。
しかし、特許文献1に記載された技術は複数のLEDを使用することを前提としており、単一のLEDのみで構成する照明装置の色むらの発生を抑える技術としては向いておらず、単一のLEDにて構成しようという照明装置には採用できない。
Now, it is preferable that the color of the irradiation light as the illumination device can be realized by only a single LED. This is because the structure is simple and the cost can be reduced.
However, 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 including only a single LED. It cannot be used for lighting devices that are made up of LEDs.

また、特許文献2に記載された技術は、LEDの照射むらを消しつつ、照度を落とさないための技術としては、光拡散シートを用いる技術では不十分な面もあった。   In addition, the technique described in Patent Document 2 has an insufficient aspect of a technique using a light diffusing sheet as a technique for eliminating the uneven illumination of the LED and not reducing the illuminance.

以上から明らかなように、所望される照射光の色を単一のLEDのみで実現でき、照度を落とさずに色むらが抑制可能な照明器具およびそれを用いた撮像装置は実現していなかった。
本発明が解決しようとする課題は、所望される照射光の色を単一のLEDのみで実現でき、照度を落とさずに色むらが抑制可能な照明器具およびそれを用いた撮像装置を提供することにある。
As is clear from the above, a desired illumination color can be realized with only a single LED, and a lighting fixture capable of suppressing color unevenness without reducing illuminance and an imaging apparatus using the same have not been realized. .
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 uneven color without reducing illuminance, and an imaging device using the same. There is.

ここで、請求項1から請求項3に記載の発明の目的は、所望される照射光の色を単一のLEDのみで実現でき、照度を落とさずに色むらが抑制可能なLED照明装置を提供することである。
また、請求項4に記載の発明の目的は、所望される照射光の色を単一のLEDのみで実現でき、照度を落とさずに色むらが抑制可能な照明装置を用いた撮像装置を提供することである。
Here, the object of the invention described in claims 1 to 3 is to provide an LED lighting device that can realize a desired color of irradiation light with only a single LED and can suppress uneven color without reducing illuminance. Is to provide.
Further, an object of the invention described in claim 4 is to provide 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. It is to be.

(請求項1)
請求項1記載の発明は、LEDから発せられた光束を二枚の集光レンズによって集光させて照射させる照明装置に係る。
すなわち、電源供給部材を固定したベース基板(50)と、 そのベース基板(50)に実装されるLED(11)と、 そのLED(11)とは反対側に配置した非球面形状の第一集光レンズ(20)と、 その第一集光レンズ(20)に対して前記LED(11)とは反対側に配置した非球面形状の第二集光レンズ(40)とを備え、 前記の第一集光レンズ(40)は、その材質である合成樹脂原料に対して光拡散剤を0.01乃至1重量%を含有させたことを特徴とする。
(Claim 1)
The invention described in claim 1 relates to an illuminating device that irradiates a light beam emitted from an LED by condensing the light beam by two condenser lenses.
That is, the base substrate (50) to which the power supply member is fixed, the LED (11) mounted on the base substrate (50), and the first aspherical surface disposed on the opposite side of the LED (11). An optical lens (20), and an aspherical second condenser lens (40) disposed on the opposite side of the first condenser lens (20) from the LED (11). One condensing lens (40) is characterized by containing 0.01 to 1% by weight of a light diffusing agent with respect to a synthetic resin raw material as a material thereof.

(用語説明)
「LED」は、青色発光ダイオードに限らない。例えば、RGBをワンパッケージ化した複合LEDも含む。
「光拡散剤」としては、既知のものが採用される。0.01重量%以下とすると、十分に混色出来ないので不合理である。また、1.0重量%以上とすると、照度が落ちてしまうので不合理である。
(Glossary)
“LED” is not limited to a blue light emitting diode. For example, a composite LED in which RGB is packaged is also included.
As the “light diffusing agent”, known ones are employed. If it is 0.01% by weight or less, it is unreasonable because the colors cannot be mixed sufficiently. On the other hand, if it is 1.0% by weight or more, the illuminance falls, which is unreasonable.

(作用)
上記のような構造により、照度を落とさずに、照射むらを消すことができる。
また、第一集光レンズ(20)に光拡散作用を担わせたので、従来技術では必要であった光拡散シートを省略することができる。このため、照明装置の構造、組み立て工程などが単純化される。
なおここで、「光拡散シート」とは、平行光が入射した場合に所定角度(例えば60度)へ拡散するという性能を有する。材質は、例えばポリカーボネートである。
(Function)
With the above-described structure, it is possible to eliminate the irradiation unevenness without reducing the illuminance.
In addition, since the first condenser lens (20) has a light diffusing action, the light diffusing sheet required in the prior art can be omitted. For this reason, the structure of an illuminating device, an assembly process, etc. are simplified.
Here, the “light diffusion sheet” has a performance of diffusing to a predetermined angle (for example, 60 degrees) when parallel light enters. The material is polycarbonate, for example.

(請求項2)
請求項2に記載の発明もまた、LEDから発せられた光束を二枚の集光レンズによって集光させて照射させる照明装置に係る。
すなわち、電源供給部材を固定したベース基板(50)と、 そのベース基板(50)に実装されるLED(11)と、 そのLED(11)とは反対側に配置した非球面形状の第一集光レンズ(20)と、 その第一集光レンズ(20)に対して前記LED(11)とは反対側に配置した非球面形状の第二集光レンズ(40)とを備え、 前記の第二集光レンズ(40)は、その材質である合成樹脂原料に対して光拡散剤を0.01乃至1重量%を含有させたことを特徴とする。
(Claim 2)
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 condenser lenses.
That is, the base substrate (50) to which the power supply member is fixed, the LED (11) mounted on the base substrate (50), and the first aspherical surface disposed on the opposite side of the LED (11). An optical lens (20), and an aspherical second condenser lens (40) disposed on the opposite side of the first condenser lens (20) from the LED (11). The double condenser lens (40) is characterized by containing 0.01 to 1% by weight of a light diffusing agent with respect to a synthetic resin raw material as a material thereof.

上記のような構造によっても、照度を落とさずに、照射むらを消すことができる。
また、第二集光レンズ(40)に光拡散作用を担わせたので、従来技術では必要であった光拡散シートを省略することができる。このため、照明装置の構造、組み立て工程などが単純化される。
Even with the above structure, it is possible to eliminate uneven irradiation without reducing the illuminance.
In addition, since the second condensing lens (40) has a light diffusing action, the light diffusing sheet required in the prior art can be omitted. For this reason, the structure of an illuminating device, an assembly process, etc. are simplified.

(請求項3)
請求項3に記載の発明は、請求項1または請求項2のいずれかに記載のLED照明装置を限定したものであり、
前記第一集光レンズ(20)および前記第二集光レンズ(40)のいずれか一方のうち、光拡散剤を含有しない集光レンズに着色を施したことを特徴とする。
集光レンズへの着色方法としては、合成樹脂に染料を混入させるなどの従来技術が採用される。
(Claim 3)
Invention of Claim 3 limited the LED illuminating device in any one of Claim 1 or Claim 2,
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.
As a method for coloring the condenser lens, a conventional technique such as mixing a dye into a synthetic resin is employed.

LED(11)が発光する色とは別の光が要望される場合がある。このような場合、光拡散剤を含有しない集光レンズに着色することで、その要望に応えることができる。   There is a case where light different from the color emitted by the LED (11) is desired. In such a case, the request can be met by coloring the condensing lens that does not contain the light diffusing agent.

(請求項4)
請求項4に記載の発明は、請求項1から請求項3に記載のLED照明装置を採用した撮像装置に係る。
(Claim 4)
A fourth aspect of the present invention relates to an imaging apparatus that employs the LED illumination device according to any one of the first to third aspects.

「撮像装置」としては、例えば、デジタルカメラ、カメラ機能付き携帯電話などが挙げられる。
本請求項に係る撮像装置は、色むらが少ない照明装置を補助光として使えるので、撮影する画像の品質向上に貢献する。
Examples of the “imaging device” include a digital camera and a mobile phone with a camera function.
Since the imaging device according to the present invention can use an illumination device with little color unevenness as auxiliary light, it contributes to improving the quality of a captured image.

請求項1から請求項3に記載の発明によれば、所望される照射光の色を単一のLEDのみで実現でき、照度を落とさずに色むらが抑制可能なLED照明装置を提供することができた。
また、請求項4に記載の発明によれば、所望される照射光の色を単一のLEDのみで実現でき、照度を落とさずに色むらが抑制可能な照明装置を用いた撮像装置を提供することができた。
According to the first to third aspects of the present invention, it is possible to provide an LED lighting device that can realize a desired color of irradiation light with only a single LED and can suppress uneven color without reducing illuminance. I was able to.
According to the invention described in claim 4, there is provided an imaging device using an illumination device capable of realizing a desired color of irradiation light with only a single LED and suppressing color unevenness without reducing illuminance. We were able to.

以下、本発明を実施の形態及び図面に基づいて、更に詳しく説明する。ここで使用する図面は、図1および図2である。図1は、第一の実施形態に係る照明装置を示す側断面図である。図2は、第二の実施形態に係る照明装置を示す側断面図である。   Hereinafter, the present invention will be described in more detail based on embodiments and drawings. The drawings used here are FIGS. 1 and 2. FIG. 1 is a side cross-sectional view showing the lighting apparatus according to the first embodiment. FIG. 2 is a side cross-sectional view showing the lighting apparatus according to the second embodiment.

(全体構成)
図1に示すように、照明装置10は、LED11(光源)からの入射光束を、形状の異なる複数の集光レンズ20、40によって集光させて、配光の異なる出射光束として被照射体(図中では上方に位置する)に照射する照明装置である。
(overall structure)
As shown in FIG. 1, 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 emits the irradiated light beam as an emitted light beam having a different light distribution ( It is an illuminating device that irradiates (located above) in the drawing.

照明装置10は、LED11を発光させるためのコネクタ(=電源供給部材、図示を省略)が載置されたベース基板50と、そのベース基板50に固定された円筒状のレンズホルダー70と、そのレンズホルダー70における前記LED11寄りに位置して固定される第一集光レンズ20と、その第一集光レンズ20における反LED11側に位置して固定される第二集光レンズ40とを備えている。   The illumination device 10 includes a base substrate 50 on which a connector (= power supply member, not shown) for causing the LEDs 11 to emit light, a cylindrical lens holder 70 fixed to the base substrate 50, and a lens thereof. The first condenser lens 20 is positioned and fixed near the LED 11 in the holder 70, and the second condenser lens 40 is positioned and fixed on the side opposite to the LED 11 in the first condenser lens 20. .

前記の第一集光レンズ20および第二集光レンズ40の間には、前記レンズホルダー70の内径寸法を外形寸法とする円筒形の内スリーブ80を介在させている。また、前記第二集光レンズ40における反第一集光レンズ20側には、前記レンズホルダー70の内径寸法を外形寸法とするリング状の外スリーブ90を固定している。   Between the first condenser lens 20 and the second condenser lens 40, a cylindrical inner sleeve 80 having an inner diameter dimension of the lens holder 70 as an outer dimension is interposed. 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.

前記の第一集光レンズ20は、その材質である合成樹脂原料に対して光拡散剤を0.01乃至1重量%を含有させている。   The first condenser lens 20 contains a light diffusing agent in an amount of 0.01 to 1% by weight with respect to the synthetic resin raw material.

一方、第二集光レンズ40には、着色を施す。着色方法としては、合成樹脂に所望の着色が可能となる染料を用いる。着色する理由は、前記LED11が発光する色とは別の光が要望される場合があるからである。
このような場合、光拡散剤を含有しない集光レンズに着色することで、その要望に応えることができる。なお、白色の場合には、着色しない。
On the other hand, the second condenser lens 40 is colored. As 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.
In such a case, the request can be met by coloring the condensing lens that does not contain the light diffusing agent. In the case of white, it is not colored.

上記のような実施形態により、照度を落とさずに、照射むらを消すことができた。
また、第一集光レンズ20に光拡散作用を担わせたので、従来技術では必要であった光拡散シートを省略することができる。このため、照明装置の構造、組み立て工程などが単純化される。
According to the embodiment as described above, the irradiation unevenness could be eliminated without reducing the illuminance.
In addition, since the first condenser lens 20 has a light diffusing action, it is possible to omit a light diffusing sheet that is necessary in the prior art. For this reason, the structure of an illuminating device, an assembly process, etc. are simplified.

(バリエーション)
前記の第一集光レンズ20の代わりに第二集光レンズ40の材質である合成樹脂原料に対して光拡散剤を0.01乃至1重量%を含有させることもできる。その場合でも、照度を落とさずに、照射むらを消すことができる。
なお、その場合に前記LED11が発光する色とは別の光が要望されるのであれば、第一集光レンズ20に着色する。
(variation)
Instead of the first condenser lens 20, 0.01 to 1% by weight of a light diffusing agent may be contained in the synthetic resin 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.
In this case, if light different from the color emitted by the LED 11 is desired, the first condenser lens 20 is colored.

(ベース基板)
前記のベース基板50の材質としては、メタル等の金属製材質によって形成されている。このため、LED11によって内部に蓄熱された熱が、効率よく外部に放熱されるような放熱促進効果が図られる材質となっている。
(Base substrate)
The base substrate 50 is made of a metal material such as metal. For this reason, it is a material that achieves a heat radiation promoting effect such that the heat stored inside by the LED 11 is efficiently radiated to the outside.

(LED)
LED11は、1WハイパワーLEDを採用する。そのLED11は縦2.8mm、横3.4mm、高さ1.15mmの直方体状の外形をなしている。また、第一集光レンズ20側に向かって、ほぼ同一の配光角度(例えば、指向特性(半値全角)標準値120°程度)の光束を発する。設置箇所は、ベース基板50の上面51の中央部に配設されている。
なお、本実施形態におけるLED11は、白色LEDを採用しており、図示しない青色LEDチップと黄色の蛍光体で白色光を実現可能なLEDとして形成されている。このため、照射される光は、白色光となっている。
(LED)
The LED 11 employs a 1 W high power LED. The LED 11 has a rectangular parallelepiped outer shape of 2.8 mm in length, 3.4 mm in width, and 1.15 mm in height. Further, light beams having substantially the same light distribution angle (for example, a directivity characteristic (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.
In addition, white LED is employ | adopted for LED11 in this embodiment, and it forms as LED which can implement | achieve white light with the blue LED chip which is not shown in figure and yellow fluorescent substance. For this reason, the irradiated light is white light.

(レンズホルダー・内スリーブ・外スリーブ)
円筒状に形成されたレンズホルダー70の内部に、リング状の内スリーブ80および外スリーブ90によって各集光レンズ20,40が保持されている。
レンズホルダー70、内スリーブ80および外スリーブ90は、それぞれアルミニウム等の金属製材質によって形成されている。このため、LED11によって内部に蓄熱された熱が、効率よく外部に放熱されるような放熱促進効果が図られる材質となっている。
(Lens holder, inner sleeve, outer sleeve)
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 achieves a heat radiation promoting effect such that the heat stored inside by the LED 11 is efficiently radiated to the outside.

(集光レンズ)
第一集光レンズ20は、LED11側の面をフラットとし、反LED11側の面を凸型に形成している。この凸型面は、非球面形状であり、LEDからの光束を有効的に集光する。
第二集光レンズ40は、第一集光レンズ20側の面も、反第一集光レンズ20側の面も凸型に形成している。第一集光レンズ20側の凸面も、反第一集光レンズ20側の凸面も非球面形状であり、LEDからの光束を有効的に集光する。
このように形成された集光レンズ20,40により、第二集光レンズ40から出射される光束の出射角度が調節されるので、被照射体に丸い綺麗な照射が実現される。
(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. The convex surface has an aspherical shape and effectively collects the light flux from the LED.
In the second condenser lens 40, both the surface on the first condenser lens 20 side and the surface on the anti-first condenser lens 20 side are formed in a convex shape. 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.
Since the emission angle of the light beam emitted from the second condenser lens 40 is adjusted by the condenser lenses 20 and 40 formed in this way, a round and beautiful irradiation is realized on the irradiated object.

(第二の実施形態)
続いて、第二の実施形態について説明する。第二の実施形態は、第一の実施形態と異なり、第一集光レンズ20Aおよび第二集光レンズ40Aの製造において光拡散剤を混入せず、光拡散シート30を採用している。本実施形態における光拡散シート30は、LED11Aからの入射光束が平行光で入射された場合に、約60°で拡散して出射するものを使用している。また、光拡散シートの高さ約0.25mm、直径φ8.4mm、円周26.39mm、とした。
LED11Aから前記の光拡散シート30までの距離は、0.95mmである。また、光拡散シート30上面から内側レンズ20A底部までの距離は、0.68mmである。また、第一集光レンズ20Aの天頂部から第二集光レンズ40Aの底部までの距離は、0.1mmである。
(Second embodiment)
Next, the second embodiment will be described. Unlike the first embodiment, the second embodiment employs the light diffusion sheet 30 without mixing a light diffusing agent in the manufacture 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 the 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.

(集光レンズ)
第一集光レンズ20Aおよび第二集光レンズ40Aの材質としては、例えば、アクリル等の透光樹脂や、COP(シクロオレフィンポリマー)、COC(シクロオレフィンコポリマー)等の透光性を有する耐熱樹脂などを用いることができる。
第一集光レンズ20Aおよび第二集光レンズ40Aのいずれかまたは双方には、所望される光の色を出すために、着色剤を含有している。いずれのレンズにも光拡散剤を含有していないので、着色が自由に行える。
(Condenser lens)
As a material of the first condenser lens 20A and the second condenser lens 40A, for example, a translucent resin such as acrylic, or a heat-resistant resin having translucency such as COP (cycloolefin polymer) or COC (cycloolefin copolymer). Etc. can be used.
Either or both of the first condenser lens 20A and the second condenser lens 40A contain a colorant in order to produce a desired color of light. Since neither lens contains a light diffusing agent, coloring can be performed freely.

(効果)
本実施形態によれば、被照射体に照射された光のスポットおよびそのエッジが非常に「くっきり」したスポット光となる。また、拡散シート30によって均一な配光制御が可能となるので、色むらおよび照度むらを低減させることになる。
したがって、各集光レンズ20A、40Aから光束が拡散される際に発生する色むら問題と、その色むら問題を解決した際に生じる機器の大型化問題とを同時に解決することができる。このため、携帯電話やデジタルカメラなどの撮影用補助灯としての照明装置を装着する際でも、小型化に対する要望に応えることができる。
(effect)
According to the present embodiment, the spot of the light irradiated on the irradiated object and the edge thereof become spot light that is very “clear”. In addition, since the light distribution can be uniformly controlled by the diffusion sheet 30, uneven color and uneven illumination are reduced.
Therefore, it is possible to simultaneously solve the uneven color problem that occurs when the light flux is diffused from each of the condensing lenses 20A and 40A and the problem of increasing the size of the device that occurs when the uneven color problem is solved. Therefore, it is possible to meet the demand for downsizing even when a lighting device as a photographing auxiliary lamp such as a mobile phone or a digital camera is mounted.

なお、上述した各部品サイズおよび各部品間の設置距離は、あくまで一例であり、上記に限定されることはない。
また、本実施形態におけるLED11及びLED11Aは、1WハイパワーLEDを採用した例を示しているが、これに限定されることはない。例えば、3W、5Wまたはそれ以上としても良く、消費電力が他のワット数になっても応用可能である。
In addition, each component size mentioned above and the installation distance between each component are an example to the last, and are not limited to the above.
Moreover, although LED11 and LED11A in this embodiment have shown the example which employ | adopted 1W high power LED, it is not limited to this. For example, it may be 3 W, 5 W or more, and can be applied even when the power consumption is other wattage.

本願発明は、紫外線を含まないので、紫外光を嫌うような被照明品(例えば、博物館や美術館の展示品)、病院などにおける照明として最適である。また、色むらや照度むらが極めて少ないので、美術品や商品を綺麗に照らすことにも適している。
また、照明面と非照明面との境目(エッジ)が明確な照明を可能としているので、周囲への散光が問題となるような読書灯にも適している。
また、小型軽量であるため、カメラ付きの携帯電話、デジタルカメラなどの撮影用の補助灯にも用いることができる技術である。
Since the present invention does not include ultraviolet rays, it is most suitable as illumination in an object that dislikes ultraviolet light (for example, exhibits in museums and art galleries) and hospitals. In addition, since there is very little color unevenness and illuminance unevenness, it is also suitable for beautifully illuminating artworks and products.
Moreover, since the boundary (edge) between the illumination surface and the non-illumination surface enables clear illumination, it is also suitable for a reading lamp in which scattered light is a problem.
In addition, since it is small and light, it is a technology that can also be used for auxiliary lighting for photographing such as a mobile phone with a camera and a digital camera.

第一の実施形態に係る照明装置を示す側断面図である。It is a sectional side view which shows the illuminating device which concerns on 1st embodiment. 第二の実施形態に係る照明装置を示す側断面図である。It is a sectional side view which shows the illuminating device which concerns on 2nd embodiment.

符号の説明Explanation of symbols

10 照明装置 10A 照明装置
11 LED 11A LED
20 第一集光レンズ 20A 第一集光レンズ
30 光拡散シート
40 第二集光レンズ 40A 第二集光レンズ
50 ベース基板 50A ベース基盤
51 上面
60 LEDホルダー
70 レンズホルダー 70A レンズホルダー
80 内スリーブ 80A 内スリーブ
90 外スリーブ 90A 外スリーブ



10 Illumination Device 10A Illumination Device 11 LED 11A LED
DESCRIPTION OF SYMBOLS 20 1st condensing lens 20A 1st condensing lens 30 Light diffusion sheet 40 2nd condensing lens 40A 2nd condensing lens 50 Base board | substrate 50A Base board | substrate 51 Upper surface 60 LED holder 70 Lens holder 70A Lens holder 80 Inner sleeve 80A In Sleeve 90 Outer sleeve 90A Outer sleeve



Claims (4)

LEDから発せられた光束を二枚の集光レンズによって集光させて照射させる照明装置であって、
電源供給部材を固定したベース基板と、
そのベース基板に実装されるLEDと、
そのLEDとは反対側に配置した非球面形状の第一集光レンズと、
その第一集光レンズに対して前記LEDとは反対側に配置した非球面形状の第二集光レンズとを備え、
前記の第一集光レンズは、その材質である合成樹脂原料に対して光拡散剤を0.01乃至1重量%を含有させたことを特徴とするLED照明装置。
An illumination device for condensing and irradiating a light beam emitted from an LED with two condenser lenses,
A base substrate to which a power supply member is fixed;
LEDs mounted on the base substrate,
An aspherical first condenser lens disposed on the opposite side of the LED;
An aspherical second condensing lens disposed on the opposite side of the LED with respect to the first condensing lens,
Said 1st condensing lens was made to contain 0.01 to 1 weight% of light diffusing agents with respect to the synthetic resin raw material which is the material, The LED illuminating device characterized by the above-mentioned.
LEDから発せられた光束を二枚の集光レンズによって集光させて照射させる照明装置であって、
電源供給部材を固定したベース基板と、
そのベース基板に実装されるLEDと、
そのLEDとは反対側に配置した非球面形状の第一集光レンズと、
その第一集光レンズに対して前記LEDとは反対側に配置した非球面形状の第二集光レンズとを備え、
前記の第二集光レンズは、その材質である合成樹脂原料に対して光拡散剤を0.01乃至1重量%を含有させたことを特徴とするLED照明装置。
An illumination device for condensing and irradiating a light beam emitted from an LED with two condenser lenses,
A base substrate to which a power supply member is fixed;
LEDs mounted on the base substrate,
An aspherical first condenser lens disposed on the opposite side of the LED;
An aspherical second condensing lens disposed on the opposite side of the LED with respect to the first condensing lens,
Said 2nd condensing lens is an LED illuminating device characterized by including 0.01 to 1 weight% of light diffusing agents with respect to the synthetic resin raw material which is the material.
前記第一集光レンズおよび前記第二集光レンズのいずれか一方のうち、光拡散剤を含有しない集光レンズに着色したことを特徴とする請求項1または請求項2のいずれかに記載のLED照明装置。   3. The condenser lens according to claim 1, wherein one of the first condenser lens and the second condenser lens is colored to a condenser lens that does not contain a light diffusing agent. 4. LED lighting device. 請求項1、または請求項2、または請求項3のLED照明装置を照明装置として用いた撮像装置。

The imaging device which used the LED lighting apparatus of Claim 1, 2 or 3 as an illuminating device.

JP2006209235A 2006-07-31 2006-07-31 Illumination device, and imaging apparatus Pending JP2008034321A (en)

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