JPH0272388A - Lighting device - Google Patents
Lighting deviceInfo
- Publication number
- JPH0272388A JPH0272388A JP63222340A JP22234088A JPH0272388A JP H0272388 A JPH0272388 A JP H0272388A JP 63222340 A JP63222340 A JP 63222340A JP 22234088 A JP22234088 A JP 22234088A JP H0272388 A JPH0272388 A JP H0272388A
- Authority
- JP
- Japan
- Prior art keywords
- light
- linear fresnel
- reflected
- light source
- fresnel reflecting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000005286 illumination Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
- G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise 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
- G02B6/0065—Manufacturing aspects; Material aspects
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、受動型表示装置、特に液晶表示装置の背面照
明（バックライト）に用いられるライトガイドに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light guide used for backlighting of passive display devices, particularly liquid crystal display devices.
従来より、受動型表示装置は、液晶表示装置（以下ＬＣ
Ｄと略す）の様に自らは発光しない念め、自然光や他の
照明源からの照射光を変調し、パターン表示を行なうも
のである。従って、受動型装置においては、周囲が暗い
場合には照明手段金膜けないと表示が見難くなるという
問題がある。Traditionally, passive display devices have been called liquid crystal display devices (hereinafter referred to as LC).
(abbreviated as D), it does not emit light by itself, so it modulates the irradiation light from natural light or other illumination sources to display a pattern. Therefore, in a passive type device, there is a problem that when the surroundings are dark, the display becomes difficult to see unless the gold film of the illumination means is removed.
このため、低消費電力の表示装置を必要とする場合、照
明源からの照射光を効率的に反射する手段全必要とする
。この種の装置として例えば、特開昭６１−５４５８３
号公報に記載のように、リニアフレネル反射面を異なっ
た方向の反射面で交互に階段上に連設する方式があるが
、この方式によると、表示パネル側からライトガイド金
兄るとストライプ状に見え、均一な照明が得られないと
いう問題がめった。Therefore, if a display device with low power consumption is required, all means for efficiently reflecting the irradiated light from the illumination source are required. As an example of this type of device, for example, Japanese Patent Application Laid-Open No. 61-54583
As described in the publication, there is a method in which linear Fresnel reflective surfaces are alternately installed on the stairs with reflective surfaces in different directions. The problem was that uniform lighting could not be obtained.
〔発明が解決しよ５とする課題〕
上記従来技術は、受動型表示装置のＩＪ ニアフレネル
反射面の反射光の方向については配慮がされておらず、
照明がストライプ状となる問題があった。本発明の目的
は、上記の問題点を解消し、均一で効率的な反射光を得
るリニアフレネル反射面により、低消費電力の受動型表
示装置を提供することにある。[Problems to be Solved by the Invention] The above-mentioned prior art does not consider the direction of reflected light from the IJ near Fresnel reflective surface of a passive display device.
There was a problem with the lighting becoming striped. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a passive display device with low power consumption using a linear Fresnel reflecting surface that obtains uniform and efficient reflected light.
上記目的は、階段上に形成し友リニアフレネル反射面全
曲面で形成することにより達成される。The above object is achieved by forming a linear Fresnel reflecting surface on a staircase with a fully curved surface.
照明源からの平行元金リニアフレネル反射面の曲面によ
ρ散乱させるため、反射光が一部に集中せず均一な照明
が可能となる。Since the parallel element gold from the illumination source is scattered by the curved surface of the linear Fresnel reflection surface, the reflected light is not concentrated in one part and uniform illumination is possible.
以下本発明の実施例を第１図囚、（匂によジ説明する。 Embodiments of the present invention will be explained below with reference to FIG. 1.
第１図囚は、本発明による一実施例を説明する照明装置
の構成図、（Ｂ）は同じく、リニアフレネル反射面の拡
大図でおる。FIG. 1B is a block diagram of an illumination device illustrating an embodiment of the present invention, and FIG. 1B is an enlarged view of a linear Fresnel reflecting surface.
光源３から出射した元がライトガイド２に入射後、リニ
アフレネル反射面２−αで反射し１表示パネル１に照射
される。After the light emitted from the light source 3 enters the light guide 2, it is reflected by the linear Fresnel reflecting surface 2-α and is irradiated onto the display panel 1.
リニアフレネル反射面の表面は第１図（Ｂ）のように階
段状の曲面形状となっている定め、光源６から出射し足
元が曲面部で反射して散乱する。この九め、表示パネル
１からライトガイド２を見ると、反射光が均一に散乱し
ているため、照明むらの煕い良好な画像が得られる。The surface of the linear Fresnel reflective surface has a step-like curved shape as shown in FIG. 1(B), and the light emitted from the light source 6 is reflected and scattered by the curved surface at the foot. Ninth, when looking at the light guide 2 from the display panel 1, the reflected light is uniformly scattered, so that a good image with no uneven illumination can be obtained.
以上のように、本発明によれば、光源からの光ｔ ＩＪ
ニア７レネル板の階段部の曲面で一様に散乱させるた
め、表示パネル面上で均一な照明が得られ、簡単な構成
で高性能な照明装置が実現できる。As described above, according to the present invention, the light t IJ from the light source
Since the light is uniformly scattered by the curved surface of the staircase part of the near-7 Lenel board, uniform illumination can be obtained on the display panel surface, and a high-performance illumination device can be realized with a simple configuration.
第１図（Ａ）は本発明の一実施例における装置の概要を
示す１１１面図。第１図（Ｂ）はリニアフレネル反射面
の拡大図である。
１・・・表示パネル
２・・・ライトガイド、
３・・・光源。FIG. 1(A) is a 111-plane view showing an outline of an apparatus in an embodiment of the present invention. FIG. 1(B) is an enlarged view of the linear Fresnel reflecting surface. 1... Display panel 2... Light guide, 3... Light source.
Claims (1)
に光源を配し、該光源からの照明光を前記リニアフレネ
ル反射面で反射した後前記ライトガイドの出射面より導
出させる照明装置において、前記リニアフレネル反射面
を曲面により階段上に形成したことを特徴とする照明装
置。1. An illumination device in which a light source is disposed at one end of a light guide having a linear Fresnel reflective surface, and the illumination light from the light source is reflected by the linear Fresnel reflective surface and then guided out from the output surface of the light guide. A lighting device characterized in that a reflective surface is formed on a staircase by a curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63222340A JPH0272388A (en) | 1988-09-07 | 1988-09-07 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63222340A JPH0272388A (en) | 1988-09-07 | 1988-09-07 | Lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0272388A true JPH0272388A (en) | 1990-03-12 |
Family
ID=16780810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63222340A Pending JPH0272388A (en) | 1988-09-07 | 1988-09-07 | Lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0272388A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0478102A2 (en) * | 1990-09-27 | 1992-04-01 | Compaq Computer Corporation | Faceted light pipe |
| JPH04168418A (en) * | 1990-11-01 | 1992-06-16 | Riyoosan:Kk | Light source device |
| JPH1039302A (en) * | 1996-05-09 | 1998-02-13 | Matsushita Electric Ind Co Ltd | Surface illumination system |
| US6862141B2 (en) | 2002-05-20 | 2005-03-01 | General Electric Company | Optical substrate and method of making |
| US7180672B2 (en) | 2002-05-20 | 2007-02-20 | General Electric Company | Optical substrate and method of making |
| US7248412B2 (en) | 2003-12-31 | 2007-07-24 | General Electric Company | Optical substrate with modulated structure |
| EP1826801A2 (en) * | 2006-02-23 | 2007-08-29 | Samsung SDI Co., Ltd. | Plasma display apparatus |
| US20100045167A1 (en) * | 2008-08-22 | 2010-02-25 | Yasuki Kawashima | Surface light-emitting device and illuminating apparatus and display apparatus including the same |
| US7859759B2 (en) | 2002-05-20 | 2010-12-28 | Sabic Innovative Plastics Ip B.V. | Film, backlight displays, and methods for making the same |
-
1988
- 1988-09-07 JP JP63222340A patent/JPH0272388A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0478102A2 (en) * | 1990-09-27 | 1992-04-01 | Compaq Computer Corporation | Faceted light pipe |
| JPH04168418A (en) * | 1990-11-01 | 1992-06-16 | Riyoosan:Kk | Light source device |
| JPH1039302A (en) * | 1996-05-09 | 1998-02-13 | Matsushita Electric Ind Co Ltd | Surface illumination system |
| US7859759B2 (en) | 2002-05-20 | 2010-12-28 | Sabic Innovative Plastics Ip B.V. | Film, backlight displays, and methods for making the same |
| US6862141B2 (en) | 2002-05-20 | 2005-03-01 | General Electric Company | Optical substrate and method of making |
| US7180672B2 (en) | 2002-05-20 | 2007-02-20 | General Electric Company | Optical substrate and method of making |
| US7324284B2 (en) | 2002-05-20 | 2008-01-29 | General Electric Company | Optical substrate and method of making |
| US7965447B2 (en) | 2002-05-20 | 2011-06-21 | Sabic Innovative Plastics Ip B.V. | Optical substrate and method of making |
| US7248412B2 (en) | 2003-12-31 | 2007-07-24 | General Electric Company | Optical substrate with modulated structure |
| US7483195B2 (en) | 2003-12-31 | 2009-01-27 | Sabic Innovative Plastics Ip B.V. | Optical substrate with modulated structure |
| EP1826801A2 (en) * | 2006-02-23 | 2007-08-29 | Samsung SDI Co., Ltd. | Plasma display apparatus |
| EP1826801A3 (en) * | 2006-02-23 | 2009-11-11 | Samsung SDI Co., Ltd. | Plasma display apparatus |
| US20100045167A1 (en) * | 2008-08-22 | 2010-02-25 | Yasuki Kawashima | Surface light-emitting device and illuminating apparatus and display apparatus including the same |
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