JP2010244790A - 発光装置 - Google Patents
発光装置 Download PDFInfo
- Publication number
- JP2010244790A JP2010244790A JP2009091001A JP2009091001A JP2010244790A JP 2010244790 A JP2010244790 A JP 2010244790A JP 2009091001 A JP2009091001 A JP 2009091001A JP 2009091001 A JP2009091001 A JP 2009091001A JP 2010244790 A JP2010244790 A JP 2010244790A
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- 230000003287 optical effect Effects 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 230000007423 decrease Effects 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 10
- 238000005286 illumination Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 239000012788 optical film Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- -1 for example Polymers 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01L33/52—Encapsulations
- H01L33/54—Encapsulations having a particular shape
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
- G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Planar Illumination Modules (AREA)
- Led Device Packages (AREA)
Abstract
【解決手段】発光装置は、基板1、LED素子2およびレンズ4を備える。レンズ4の出射面41は、第1出射面41aと第2出射面41bを有する。出射面41を光軸Aを含む平面で切った曲線は、第1出射面41aと第2出射面41bの境界上に傾斜率が不連続に低下する変化点Pを有する。変化点PとLED素子2の発光中心とを結ぶ線分Lと光軸Aとのなす角度は、出射面41から出射される光を出射角度ごとに見たときの最大の光度となる出射角度とほぼ等しい。
【選択図】図1
Description
L(θ)=A×K(θ)×Cos3(θ)・・・(式1)
ここで、Aは光源から照射面までの距離に依存する定数である。
L(θ)=A×K0×Cos4(θ)
L(θ)/L0=Cos4(θ)
その相対照度分布を図3に示す。
Tan(θ)=x/D
A×K(θ)×Cos3(θ)=L0
となることであり、これを変形すると、
K(θ)=L0/A×Cos-3(θ)
となる。
K(θ)/K0=Cos-3(θ)・・・(式2)
を満たすことが均一照度を実現するための配光特性となる。その出射光度分布を図4に示す。
2 LED素子
3 蛍光体層
4 レンズ
41 出射面(配光制御面)
41a 第1出射面
41b 第2出射面
A 光軸
L 線分
P 変化点
Claims (3)
- 基板と、前記基板上に実装されたLED素子と、前記LED素子を覆うように前記基板上に配置された、光軸に対して略回転対称な出射面を有するレンズと、を備え、
前記出射面は、前記光軸から広がる第1出射面と、この第1出射面の周縁部から前記基板に至る第2出射面とを有し、前記出射面を前記光軸を含む平面で切った曲線は、前記第1出射面と前記第2出射面の境界上に傾斜率が不連続に低下する変化点を有し、
前記変化点と前記LED素子の発光中心とを結ぶ線分と前記光軸とのなす角度は、前記出射面から出射される光を前記光軸に対する角度である出射角度ごとに見たときの最大の光度となる出射角度とほぼ等しい、発光装置。 - 前記レンズは、透明樹脂で構成されている、請求項1に記載の発光装置。
- 前記第2出射面は、円筒面またはテーパー面をなしている、請求項1または2に記載の発光装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009091001A JP5325639B2 (ja) | 2009-04-03 | 2009-04-03 | 発光装置 |
US12/753,307 US8147100B2 (en) | 2009-04-03 | 2010-04-02 | Lighting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009091001A JP5325639B2 (ja) | 2009-04-03 | 2009-04-03 | 発光装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010244790A true JP2010244790A (ja) | 2010-10-28 |
JP5325639B2 JP5325639B2 (ja) | 2013-10-23 |
Family
ID=42826050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009091001A Expired - Fee Related JP5325639B2 (ja) | 2009-04-03 | 2009-04-03 | 発光装置 |
Country Status (2)
Country | Link |
---|---|
US (1) | US8147100B2 (ja) |
JP (1) | JP5325639B2 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
US8147100B2 (en) | 2012-04-03 |
JP5325639B2 (ja) | 2013-10-23 |
US20100254145A1 (en) | 2010-10-07 |
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