JP2513348B2 - Lighting equipment - Google Patents
Lighting equipmentInfo
- Publication number
- JP2513348B2 JP2513348B2 JP2189733A JP18973390A JP2513348B2 JP 2513348 B2 JP2513348 B2 JP 2513348B2 JP 2189733 A JP2189733 A JP 2189733A JP 18973390 A JP18973390 A JP 18973390A JP 2513348 B2 JP2513348 B2 JP 2513348B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- incident
- reflector
- light guide
- light source
- 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.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は導光体を備えた照明装置の効率向上に関す
る。Description: [Industrial field of application] The present invention relates to improving the efficiency of a lighting device including a light guide.
［従来の技術］ 第４図は例えば，特開平１−154086号公報に示された
従来のこの種の照明装置を示す断面図である。[Prior Art] FIG. 4 is a sectional view showing a conventional illuminating device of this type disclosed in, for example, Japanese Unexamined Patent Publication No. 1-154086.
図において，（１）は光源，（２）はアクリル樹脂等
からなる透明板状体，（３）はこの透明板状体（２）の
光入射面，（４）は上記透明板状体（２）の光出射面で
ある。In the figure, (1) is a light source, (2) is a transparent plate made of acrylic resin, (3) is a light incident surface of the transparent plate (2), and (4) is the transparent plate ( It is the light emission surface of 2).
（５）は上記透明板状体（２）が複数枚積層されて構
成された導光体，（6a）はこの導光体（５）の光出射面
部に対向して配置された光反射体，（6b）は上記光源
（１）の周囲に配置された光反射体である。(5) is a light guide body formed by laminating a plurality of the transparent plate-like bodies (2), and (6a) is a light reflector body facing the light emitting surface of the light guide body (5). , (6b) are light reflectors arranged around the light source (1).
上記光反射体（6a），（6b）は一体のものとして，導
光体（５）の光出射面部および光源（１）を覆うように
して設けられている。The light reflectors (6a) and (6b) are integrally provided so as to cover the light emitting surface portion of the light guide (5) and the light source (1).
このような構成の照明装置においては，光源（１）か
ら発せられた光のうち，光入射面（３）に入射し光は，
それぞれ入射した透明板状体（２）の中を全反射を繰り
返しながら進み，それぞれの光出射面（４）から出射
し，光反射体（6a）で反射されて，導光体（５）を横切
るようにして進み，照明装置の外に出る。In the illumination device having such a configuration, of the light emitted from the light source (1), the light incident on the light incident surface (3) is
The light travels through the respective transparent plate-shaped bodies (2) that have been incident, repeating total reflection, emitted from each light emission surface (4), reflected by the light reflector (6a), and guided through the light guide (5). Walk across and go out of the lighting system.
一方，光源（１）から発せられた光のうち光反射体
（6b）に入射した光は，その一部は光反射体（6b）によ
り反射されてから透明板状体（２）の光入射面（３）に
入射したり，また，光源（１）と光反射体（6b）との間
で反射を繰り返しながら透明板状体（２）の光入射面
（３）の方向に進んでその光入射面（３）に入射したり
するが，ほとんどは光源（１）に再入射する。On the other hand, of the light emitted from the light source (1), the light that has entered the light reflector (6b) is partially reflected by the light reflector (6b) and then enters the transparent plate (2). The light is incident on the surface (3), or while repeating reflection between the light source (1) and the light reflector (6b), it advances toward the light incident surface (3) of the transparent plate (2), Although it is incident on the light incident surface (3), most of it is incident on the light source (1) again.
この光源（１）に再入射した光のうち，一部は光源
（１）から光入射面（３）に入射して，透明板状体
（２）の中を進み，光反射体（6a）により反射され，導
光体（５）の外に出射されるが，ほとんどが損失となっ
てしまう。A part of the light re-incident on the light source (1) is incident on the light incident surface (3) from the light source (1), travels through the transparent plate-like body (2), and is reflected by the light reflector (6a). It is reflected by and is emitted to the outside of the light guide (5), but most of it is lost.
［発明が解決しようとする課題］ 従来の照明装置は以上のように，光反射体（6a）が光
出射面部に接触して配置されているため，光源（１）か
ら発された光のうち光入射面（３）に入射した光だけが
上述のような経路を通って導光体（５）から外に出射さ
れることになるが，導光体（５）はアクリル樹脂のよう
な屈折率が１以上の材料から構成されていることから，
光入射面（３）に到達した光がすべて，導光体（５）に
入射するわけでなく，入射角，あるいは光入射面（３）
の表面状態により，光入射面（３）で反射され，導光体
（５）に入射しない光も多いので，入射しなかった光は
熱となって損失となり，また，光源（１）に再入射した
光についても，再び光源（１）の外に出る割合は非常に
小さく，ほとんどが損失となってしまい光源から発せら
れた光のうちかなりの割合の光が光入射面から導光体に
入射することができず，損失となるため，照明装置の外
に発せられる光の割合（効率）が低いという問題点があ
った。[Problems to be Solved by the Invention] As described above, in the conventional lighting device, since the light reflector (6a) is arranged in contact with the light emitting surface portion, among the light emitted from the light source (1), Only the light incident on the light incident surface (3) is emitted from the light guide (5) through the above-mentioned path, but the light guide (5) is refracted like an acrylic resin. Since it is composed of materials with a rate of 1 or more,
Not all the light that has reached the light incident surface (3) is incident on the light guide body (5), but the incident angle or the light incident surface (3).
Depending on the surface condition of the light, there is much light that is reflected by the light incident surface (3) and does not enter the light guide (5), so the light that did not enter becomes heat and becomes a loss, and it is returned to the light source (1). Even with respect to the incident light, the rate of going out of the light source (1) again is very small, and most of the light is lost, and a considerable proportion of the light emitted from the light source is guided from the light incident surface to the light guide. There is a problem that the ratio (efficiency) of the light emitted outside the lighting device is low because it cannot be incident and causes a loss.
この発明は上記のような問題点を解消するためになさ
れたもので，効率の高い照明装置を得ることを目的とす
る。The present invention has been made to solve the above problems, and an object thereof is to obtain a highly efficient lighting device.
［課題を解決するための手段］ この発明に係る照明装置は，光反射体と，導光体の光
出射面部および光源との間に空隙を設けたものである。[Means for Solving the Problem] An illumination device according to the present invention is provided with a space between a light reflector, a light exit surface of a light guide, and a light source.
［作用］ この発明においては，光反射体と，導光体の光出射面
部および光源との間に設けられた空隙が，導光板に入射
できない光を通し，この光は導光板を経由せずに直接光
反射板に進み，反射板で反射されて照明装置の外に出射
される。[Operation] In the present invention, the gap provided between the light reflector and the light emitting surface of the light guide and the light source allows light that cannot enter the light guide plate to pass through, and this light does not pass through the light guide plate. The light directly goes to the light reflection plate, is reflected by the reflection plate, and is emitted to the outside of the lighting device.
［実施例］ 以下、この発明の一実施例について説明する。[Embodiment] An embodiment of the present invention will be described below.
第１図において，（１）〜（５）は上記従来の照明装
置と同じものである。In FIG. 1, (1) to (5) are the same as those of the conventional lighting device.
（6a）はこの導光体（５）の光出射面部に対向して設
置された光反射体，（6b）は上記光源（１）の周囲に配
置された光反射体，（７）は透明板状体（２）の光出射
面（４）の頂辺を順次結んで得られた導光体（５）の出
射面部の包絡面，（8a）はこの包絡面（７）と光反射体
（6a）との間に設置された空隙である。(6a) is a light reflector installed so as to face the light emitting surface of the light guide (5), (6b) is a light reflector arranged around the light source (1), and (7) is transparent. The envelope surface of the light emitting surface of the light guide (5) obtained by sequentially connecting the top sides of the light emitting surface (4) of the plate-like body (2), and (8a) is the envelope surface (7) and the light reflector. It is a void installed between (6a).
光反射体（6a），（6b）上記従来の照明装置の場合と
同様に一体で連続したものとして構成されている。The light reflectors (6a) and (6b) are configured as one continuous body as in the case of the above-mentioned conventional lighting device.
空隙（8a）は光源（１）の方向に伸びており，包絡面
（７）と光反射体（6a）の間だけでなく，光源（１）と
光反射体（6b）との間にも空隙（8b）が設けられてい
る。The air gap (8a) extends in the direction of the light source (1), and not only between the envelope surface (7) and the light reflector (6a) but also between the light source (1) and the light reflector (6b). A void (8b) is provided.
このように構成された照明装置では，光源（１）から
発せられた光のうち，光入射面（３）に入射した光は，
従来の照明装置の場合と同様に，それぞれ入射した透明
板状体（２）の中を全反射を繰り返しながら進み，光出
射面（４）から出射し，光反射体（6a）で反射されて，
導光体（５）を横切るようにして照明装置の外に出る。In the illuminating device configured in this way, of the light emitted from the light source (1), the light incident on the light incident surface (3) is
As in the case of the conventional lighting device, the light travels through the respective incident transparent plate-like bodies (2) while repeating total reflection, is emitted from the light emitting surface (4), and is reflected by the light reflector (6a). ，
It goes out of the lighting device so as to cross the light guide (5).
一方光源（１）から発せられた光のうち光反射体（6
b）に入射し光は２つの異なった経路を通る。On the other hand, of the light emitted from the light source (1), the light reflector (6
Light incident on b) follows two different paths.
第１は光源（１）から発せられた光が第１図に示す光
反射体（6b）のR1の部分に入射した場合で，従来の照明
装置の時と同様に，光反射体（6b）で反射した光の一部
は光源（１）と光反射体（6b）との間で反射を繰り返し
ながら光入射面（３）の方向に進んで光入射面（３）に
入射し，ほとんどは光源（１）に再入射する。The first is the case where the light emitted from the light source (1) is incident on the R 1 portion of the light reflector (6b) shown in FIG. 1, and the light reflector (6b is the same as in the conventional lighting device. ) Part of the light reflected by the light source (1) and the light reflector (6b) repeats reflection, travels in the direction of the light incident surface (3), and is incident on the light incident surface (3). Re-enters the light source (1).
この光源（１）に再入射した光のうち，一部が光源
（１）から光入射面（３）に入射して，それぞれ入射し
た透明板状体（２）の中を全反射を繰り返しながら進
み，光出射面（４）から出射し，光反射体（6a）で反射
されて，導光体（５）の外に出射され，照明装置の外に
出る。While a part of the light re-incident on the light source (1) is incident on the light incident surface (3) from the light source (1), total reflection is repeated in the respective incident transparent plate-like bodies (2). The light travels, is emitted from the light emitting surface (4), is reflected by the light reflector (6a), is emitted to the outside of the light guide body (5), and is emitted to the outside of the illumination device.
第２は光反射体（6b）で反射された光が第１図に示す
光反射体（6b）のR2の部分に入射した場合で光反射体
（6b）で反射された光は光空隙（8b）を通って空隙（8
a）の方向に進む。Secondly, when the light reflected by the light reflector (6b) is incident on the R 2 part of the light reflector (6b) shown in FIG. 1, the light reflected by the light reflector (6b) is an optical gap. Void (8b) through (8b)
Go in the direction of a).
また一部は光源（１）と光反射体（6b）との間で反射
を繰り返し，光源（１）に再入射したり，空隙（8a）に
進む経路をとる。A part of the light is repeatedly reflected between the light source (1) and the light reflector (6b) and re-enters the light source (1), or takes a route to the void (8a).
そして空隙（8a）に進んだ光は光反射体（6a）により
反射され，導光体（５）を横切って照明装置の外に出
る。Then, the light that has proceeded to the air gap (8a) is reflected by the light reflector (6a), crosses the light guide (5), and goes out of the lighting device.
さらに，光源（１）から発せられた光のうち，直接光
反射体（6a）に入射するものもあり，この場合も光反射
体（6a）に反射され，導光体（５）を通って照明装置の
外に出る。Further, among the light emitted from the light source (1), some of the light directly enters the light reflector (6a), and in this case also, the light is reflected by the light reflector (6a) and passes through the light guide (5). Go out of the lighting system.
以上述べたことから明らかなように，この発明では，
導光体（５）の各入射面に入射し，全反射を繰り返して
進んで光反射体（6a）に入射する光の他に，導光体
（５）を経由しないで光反射体（6a）に入射する光も多
くなり，照明装置の外に発せられる光が多くなって効率
が飛躍的に上昇する。As is clear from the above description, in the present invention,
In addition to the light that is incident on each incident surface of the light guide body (5) and proceeds by repeating total reflection to enter the light reflector (6a), the light reflector (6a does not pass through the light guide body (5). ), More light is emitted, and more light is emitted to the outside of the lighting device, resulting in a dramatic increase in efficiency.
第２図（ｂ）は第２図（ａ）に示すように照明装置か
ら30cm離れた被照面における照度を，空隙（8a）および
（8b）を設置した場合と設置しない場合とで比較して示
す照度分布図であり，距離＝０の点が光源直下の点であ
る。As shown in Fig. 2 (a), Fig. 2 (b) compares the illuminance on the illuminated surface 30 cm away from the lighting device with and without the voids (8a) and (8b). It is an illuminance distribution chart shown, and the point at distance = 0 is the point directly below the light source.
この図からわかるように，上記空隙（8a）および（8
b）を設置した場合，照度が大幅に上昇していることが
わかる。As can be seen from this figure, the above voids (8a) and (8
It can be seen that when b) is installed, the illuminance increases significantly.
また，第３図に示すように，光反射体（6a）の形状を
包絡面（７）に対して凹面とすることにより，この光反
射体で反射され，導光体（５）を横切って照明装置の外
に出る経路の場合，導光体（５）への入射角が小さくな
るため，入射時の損失が少なくなり，さらに効率上昇が
期待できる。Further, as shown in FIG. 3, by making the shape of the light reflector (6a) concave with respect to the envelope surface (7), it is reflected by this light reflector and crosses the light guide (5). In the case of the route that goes out of the lighting device, the incident angle to the light guide body (5) becomes small, so the loss at the time of incidence becomes small, and further efficiency improvement can be expected.
また，上記実施例では光反射体として，導光体（５）
の出射面部から光源（１）の周囲まで一体となったもの
としたが分離形として構成してもよい。Further, in the above embodiment, the light guide (5) is used as the light reflector.
Although the light emitting surface is integrated with the periphery of the light source (1), it may be configured as a separate type.
［発明の効果］ 以上のようにこれによれば，光反射体と，導光体の光
出射面部および光源との間に空隙を設けたので，導光板
に入射できない光がその空隙を通って直接光反射板に進
み，反射板で反射されて照明装置の外に出射されるた
め，効率を上昇させることができるという効果がある。[Effects of the Invention] As described above, according to this, since the air gap is provided between the light reflector and the light emitting surface portion of the light guide and the light source, light that cannot enter the light guide plate passes through the air gap. Since the light travels directly to the light reflection plate, is reflected by the reflection plate, and is emitted to the outside of the lighting device, there is an effect that efficiency can be increased.
第１図はこの発明の一実施例を示す照明装置の断面
図，第２図は空隙の効果を測定したときの説明図および
測定結果を示す照度分布図，第３図はこの発明の他の実
施例を示す照明装置の断面図，第４図は従来の照明装置
を示す断面図である。 図において（１）は光源，（２）は透明板状体， （３）は光入射面，（４）は光出射面，（５）は導光体
（6a），（6b）は光反射体，（７）は包絡面，（8a），
（8b）は空隙である。 なお，各図中同一符号は同一または相当部分を示す。FIG. 1 is a cross-sectional view of an illuminating device showing an embodiment of the present invention, FIG. 2 is an explanatory view when the effect of a void is measured and an illuminance distribution diagram showing the measurement results, and FIG. 3 is another view of the present invention. FIG. 4 is a sectional view of an illuminating device showing an embodiment, and FIG. 4 is a sectional view showing a conventional illuminating device. In the figure, (1) is a light source, (2) is a transparent plate, (3) is a light incident surface, (4) is a light emitting surface, (5) is a light guide (6a), and (6b) is light reflected. Body, (7) is the envelope surface, (8a),
(8b) is a void. The same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
れらの複数の透明板状体の一端面および他端面によって
それぞれ構成された光入射面部および光出射面部とを有
する導光体と、 この導光体の光入射面に対向して配置された光源と、 前記導光体の光入射面を除く前記光源の周囲から上記導
光体の光出射面部の対向面まで連続して配置された光反
射体とを備え、 この光反射体と、上記導光体の光出射面部の包絡面およ
び上記光源との間に空隙を設けたことを特徴とする照明
装置。1. A light guide body comprising a plurality of laminated transparent plate-like bodies, the light guide body having a light-incident surface portion and a light-exiting surface portion formed by one end surface and the other end surface of the plurality of transparent plate-like bodies, respectively. A light source disposed opposite to the light incident surface of the light guide, and continuously disposed from the periphery of the light source excluding the light incident surface of the light guide to the facing surface of the light exit surface of the light guide. An illuminating device comprising: a light reflector, and a gap provided between the light reflector and the envelope surface of the light exit surface of the light guide and the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2189733A JP2513348B2 (en) | 1990-07-18 | 1990-07-18 | Lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2189733A JP2513348B2 (en) | 1990-07-18 | 1990-07-18 | Lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0476503A JPH0476503A (en) | 1992-03-11 |
| JP2513348B2 true JP2513348B2 (en) | 1996-07-03 |
Family
ID=16246278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2189733A Expired - Fee Related JP2513348B2 (en) | 1990-07-18 | 1990-07-18 | Lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513348B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2980776B2 (en) * | 1992-06-04 | 1999-11-22 | 東ソー株式会社 | Backlight |
| JP2913497B2 (en) * | 1993-04-12 | 1999-06-28 | 東ソー株式会社 | Backlight |
| JPH0794008A (en) * | 1993-09-24 | 1995-04-07 | Chiyatani Sangyo Kk | Flat lighting device |
| JP3924804B2 (en) * | 1996-04-09 | 2007-06-06 | カシオ計算機株式会社 | Light guiding device, manufacturing method thereof, and light source structure using the same |
| US6033974A (en) | 1997-05-12 | 2000-03-07 | Silicon Genesis Corporation | Method for controlled cleaving process |
| US9362439B2 (en) | 2008-05-07 | 2016-06-07 | Silicon Genesis Corporation | Layer transfer of films utilizing controlled shear region |
| US8993410B2 (en) | 2006-09-08 | 2015-03-31 | Silicon Genesis Corporation | Substrate cleaving under controlled stress conditions |
-
1990
- 1990-07-18 JP JP2189733A patent/JP2513348B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0476503A (en) | 1992-03-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |