JP2714407B2 - lighting equipment - Google Patents
lighting equipmentInfo
- Publication number
- JP2714407B2 JP2714407B2 JP24349088A JP24349088A JP2714407B2 JP 2714407 B2 JP2714407 B2 JP 2714407B2 JP 24349088 A JP24349088 A JP 24349088A JP 24349088 A JP24349088 A JP 24349088A JP 2714407 B2 JP2714407 B2 JP 2714407B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- housing
- reflected
- 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 - Lifetime
Links
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Planar Illumination Modules (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、表示面の背面に配置した導光板に光源から
の光を入射させて表示面を照明する表示灯や誘導灯など
の照明器具に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lighting device such as an indicator light or a guide light for illuminating a display surface by irradiating light from a light source to a light guide plate disposed on a back surface of the display surface. It is about.
［従来の技術］ 従来、器具本体を薄くするため、導光板の端部から光
を入射させるエッジライト方式の照明器具が数多く提供
され、導光板についても背面をヘアーライン加工した
り、断面を一部傾斜させたものが良く知られている。し
かし、従来では、導光板の厚さが、器具本体の厚みと略
同一であり、器具本体として極めて重いものになってい
た。更に、表示面が両側にある両面型の表示灯を考える
上で、導光板は片面型，両面型のどちらにも同一にする
のが低コストになる。そのため、導光板の厚みを器具本
体の厚みの略1/2とする必要が生じてきた。[Prior art] Conventionally, in order to reduce the thickness of the main body of the device, there are provided many edge light type lighting devices in which light is incident from an end portion of the light guide plate. Inclined ones are well known. However, conventionally, the thickness of the light guide plate is substantially the same as the thickness of the instrument body, and the instrument body is extremely heavy. Further, when considering a double-sided indicator light having a display surface on both sides, it is low cost to make the light guide plate the same for both the single-sided and double-sided types. Therefore, it has become necessary to make the thickness of the light guide plate approximately half the thickness of the instrument body.
第５図はかかる従来の誘導灯の斜視図を示し、第６図
は断面図を示している。横長に形成されたハウジング１
の下部は厚みを薄く形成し、一面には表示窓２が開口さ
れ、この表示窓２に合わせてハウジング１内に表示板３
が配置してある。ハウジング１の上部には蛍光灯のよう
な線状のランプ４と、光源であるランプ４の光を下方に
反射させる反射板５と、安定器６等が配置されている。
ハウジング１の下部には長手方向に沿って横長の導光板
７が配置されており、この導光板７は表示板３の背面に
配置されると共に、表示板３とは反対側のハウジング１
の内側面との間には隙間８を設けて配置してある。ま
た、導光板７の下部の表示板３側は傾斜面としてある。
尚、ハウジング１の下面より垂下されている引き紐９は
ランプ４を点滅させるものである。FIG. 5 is a perspective view of such a conventional guide light, and FIG. 6 is a sectional view. Horizontally formed housing 1
Is formed with a small thickness at its lower part, and a display window 2 is opened on one surface.
Is arranged. A linear lamp 4 such as a fluorescent lamp, a reflector 5 for reflecting light of the lamp 4 as a light source downward, a ballast 6 and the like are arranged at an upper portion of the housing 1.
A horizontally long light guide plate 7 is arranged at a lower portion of the housing 1 along the longitudinal direction. The light guide plate 7 is arranged on the back surface of the display panel 3, and the housing 1 on the opposite side to the display panel 3.
A gap 8 is provided between the inner surface and the inner surface. The display plate 3 side below the light guide plate 7 is an inclined surface.
The drawstring 9 hanging from the lower surface of the housing 1 blinks the lamp 4.
［発明が解決しようとする課題］ かかる従来例において、第６図の矢印に示すように、
上記隙間８に導入されたランプ４からの光がハウジング
１の内側面で反射し、その反射光が導光板７内に入り、
前面の表示板３より器具本体外に出る。このため、ラン
プ４近傍の表示板３の上部は明るく、ランプ４より遠方
の表示板３の下部は暗くなり、均斉度の点で望ましい誘
導灯や表示灯ができないという問題があった。[Problem to be Solved by the Invention] In such a conventional example, as shown by an arrow in FIG.
Light from the lamp 4 introduced into the gap 8 is reflected on the inner side surface of the housing 1, and the reflected light enters the light guide plate 7,
It comes out of the instrument body from the display panel 3 on the front. For this reason, the upper part of the display panel 3 near the lamp 4 is bright, and the lower part of the display panel 3 farther from the lamp 4 is dark.
本発明は、上述の点に鑑みて提供したものであって、
表示面の均斉度の優れた照明器具を提供することを目的
としたものである。The present invention has been provided in view of the above points,
It is an object of the present invention to provide a lighting device having an excellent display surface uniformity.
［課題を解決するための手段］ 本発明は、導光板とハウジングの内側面との間に光源
からの光を導く隙間を設け、光源の近傍であって導光板
の背面にハウジングの内側面で反射された光を反射させ
る遮光部を設けたものである。[Means for Solving the Problems] According to the present invention, a gap for guiding light from a light source is provided between a light guide plate and an inner surface of a housing. A light shielding portion for reflecting the reflected light is provided.
［作用］ しかして、遮光部で光源からの光を反射させて、ハウ
ジングの内側面で更に反射させ、光を導光板の端部側へ
入射するようにしている。[Operation] Then, the light from the light source is reflected by the light shielding portion and further reflected by the inner side surface of the housing, so that the light is incident on the end portion of the light guide plate.
（実施例） 以下、本発明の実施例を図面を参照して説明する。
尚、器具本体の全体の構成は従来と同じであり、第１図
に示すように、本発明の要旨はランプ４の近傍であっ
て、導光板７の背面の上部に遮光部である遮光板10を配
置したものである。この遮光板10は導光板７の長手方向
の全長にわたって配置している。導光板７の厚みはハウ
ジング１の略1/2であり、下方のランプ４遠方は導光板
７内に導入された光が屈折して出やすいように表示板３
側を傾斜させている。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the overall configuration of the device main body is the same as that of the related art. As shown in FIG. 1, the gist of the present invention is that a light shielding plate, which is a light shielding portion, is provided near the lamp 4 and on the upper part of the back surface of the light guide plate 7. 10 is arranged. The light shielding plate 10 is disposed over the entire length of the light guide plate 7 in the longitudinal direction. The thickness of the light guide plate 7 is approximately half of the thickness of the housing 1, and the display plate 3 is located farther below the lamp 4 so that the light introduced into the light guide plate 7 is easily refracted and emitted.
The side is inclined.
この遮光板10により、ハウジング１の内側面と導光板
７の間の隙間８に導入された光がハウジング１の内側面
で反射し、その反射光が導光板７に入射するのを防止し
ている。すなわち、表示板３のランプ４近傍は、ランプ
４から導光板７に直接導入された光のみで照明されるこ
とになる。つまり、ハウジング１の内側面と導光板７の
間に隙間８に導入された光は、ハウジング１の内側面の
P1点で遮光板10側に反射され、その反射光は遮光板10の
外側面のP2点で再度ハウジング１の内側面側に反射され
てハウジング１の下方に向かう。この光は、ハウジング
１のP3点で再度反射され、P4点で導光板７内に入り、P5
点で表示板３側に出る。The light shielding plate 10 prevents light introduced into the gap 8 between the inner surface of the housing 1 and the light guide plate 7 from being reflected by the inner surface of the housing 1 and prevents the reflected light from entering the light guide plate 7. I have. That is, the vicinity of the lamp 4 of the display panel 3 is illuminated with only the light directly introduced from the lamp 4 into the light guide plate 7. That is, the light introduced into the gap 8 between the inner surface of the housing 1 and the light guide plate 7
At point P 1 , the light is reflected toward the light-shielding plate 10, and the reflected light is reflected again at the point P 2 on the outer surface of the light-shielding plate 10 toward the inner surface of the housing 1 and travels downward of the housing 1. The light is reflected again by the P 3 points of the housing 1 enters into the light guide plate 7 at P 4 points, P 5
It comes out to the display board 3 side at a point.
このことから、導光板７に遮光板10のない従来例に比
べ、表示板３の上下方向の輝度曲線は第２図に示すよう
に、ランプ４近傍が輝度値が低下し、ランプ４遠方の下
方でハウジング１の内側面と導光板７との間の隙間８に
導入された光が加わり、最低の輝度値が上昇する。従っ
て、均斉度が著しく向上し、好ましい表示灯、誘導灯と
なる。尚、遮光板10はその反射面側を鏡面にする方が反
射の際のロスを少なくするため望ましい。Thus, as compared with the conventional example in which the light guide plate 7 does not have the light-shielding plate 10, the luminance curve in the vertical direction of the display plate 3 has a lower brightness value near the lamp 4 and a lower brightness value as shown in FIG. Light introduced into the gap 8 between the inner surface of the housing 1 and the light guide plate 7 at the lower side is added, and the minimum luminance value increases. Therefore, the degree of uniformity is remarkably improved, and a preferable indicator light and guide light are obtained. It is desirable that the light-shielding plate 10 has a mirror surface on the reflection surface side in order to reduce a loss at the time of reflection.
また、光源が蛍光灯の場合、ランプ長より表示面の長
さの方が長い場合、ランプソケット11の近傍の表示面が
暗くなるが、その際は第３図に示すように、遮光板10の
端部を三角形状に切り欠いたり、また遮光板10の一部を
透光性にし、ハウジング１の内側面からの反射光を、ラ
ンプソケット11近傍のみ導光板７に通すようにすること
で、上記の問題を解決することができ、表示面全面に均
斉度を良くすることができる。When the light source is a fluorescent lamp, and the display surface is longer than the lamp, the display surface near the lamp socket 11 becomes dark. In this case, as shown in FIG. Is cut off in a triangular shape, a part of the light shielding plate 10 is made translucent, and light reflected from the inner surface of the housing 1 passes through the light guide plate 7 only in the vicinity of the lamp socket 11. The above problem can be solved, and the uniformity can be improved over the entire display surface.
また、以上の説明の中で表示板をなくし、導光板に直
接表示内容を印刷してもよく、導光板の遮光部は鏡面材
を貼り付けたり、鏡面の印刷をしたり、更には、導光板
内に入射しないようなプリズムにする等の方法を用いて
もよい。In the above description, the display plate may be eliminated, and the display content may be printed directly on the light guide plate. The light shielding portion of the light guide plate may be pasted with a mirror surface material, printed on the mirror surface, or furthermore, may be printed on the light guide plate. A method of forming a prism that does not enter the optical plate may be used.
更に、第４図に示すような両側に表示板３を有し、ハ
ウジング１内に導光板７を２つ有する両面型の場合に
は、両導光板7,7の間に隙間８を設け、遮光板10を対向
して設けるようにしている。Further, in the case of a double-sided type having the display plates 3 on both sides as shown in FIG. 4 and two light guide plates 7 in the housing 1, a gap 8 is provided between the two light guide plates 7, 7. The light shielding plates 10 are provided to face each other.
［発明の効果］ 本発明は上述のように、導光板とハウジングの内側面
との間に光源からの光を導く隙間を設け、光源の近傍で
あって導光板の背面にハウジングの内側面で反射された
光を反射させる遮光部を設けたものであるから、遮光部
で光源からの光を反射させて、ハウジングの内側面で更
に反射させ、光を導光板の端部側へ入射するようにして
いることで、光源近傍の導光板には光源からの直接の光
のみが導入され、光源から離れた導光板の端部側には隙
間を介し遮光部及びハウジングの内側面で反射された光
が加わって導入されるため、導光板の光源近傍は従来と
比べて輝度が低下し、光源と離れた部分は輝度が上昇す
ることで、均斉度が向上し、また最低輝度も上昇して理
想的な表示灯，誘導灯などの照明器具を提供できる効果
を奏するものである。[Effects of the Invention] As described above, the present invention provides a gap for guiding light from a light source between the light guide plate and the inner surface of the housing, and the vicinity of the light source and the rear surface of the light guide plate at the inner surface of the housing. Since the light shielding portion for reflecting the reflected light is provided, the light from the light source is reflected by the light shielding portion, further reflected by the inner surface of the housing, and the light is incident on the end side of the light guide plate. By doing so, only the direct light from the light source is introduced into the light guide plate near the light source, and the light is reflected by the light shielding portion and the inner surface of the housing through the gap at the end portion of the light guide plate away from the light source. Since light is added and introduced, the luminance near the light source of the light guide plate decreases compared to the conventional one, and the luminance increases at the part far from the light source, so that the uniformity improves and the minimum luminance also increases. It has the effect of providing ideal lighting equipment such as indicator lights and guide lights. Is what you do.
第１図は本発明の実施例の断面図、第２図は同上の説明
図、第３図は同上の要部分解斜視図、第４図は同上の両
面型の断面図、第５図は誘導灯の斜視図、第６図は従来
例の断面図である。 １はハウジング、７は導光板、８は隙間、10は遮光板で
ある。1 is a cross-sectional view of an embodiment of the present invention, FIG. 2 is an explanatory view of the same, FIG. 3 is an exploded perspective view of a main part of the same, FIG. 4 is a cross-sectional view of the same double-sided type, and FIG. FIG. 6 is a perspective view of a guide light, and FIG. 6 is a sectional view of a conventional example. 1 is a housing, 7 is a light guide plate, 8 is a gap, and 10 is a light shielding plate.
Claims (1)
光板の端部の長手方向に沿って配置する線状の光源とを
ハウジング内に設け、この光源からの光を導光板内に入
射させて表示面を照明するようにした照明器具におい
て、上記導光板とハウジングの内側面との間に光源から
の光を導く隙間を設け、光源の近傍であって導光板の背
面にハウジングの内側面で反射された光を反射させる遮
光部を設けたことを特徴とする照明器具。1. A light guide plate disposed on the back side of a display surface, and a linear light source disposed along a longitudinal direction of an end of the light guide plate are provided in a housing. In the lighting fixture configured to illuminate the display surface by being incident on the light guide plate, a gap for guiding light from the light source is provided between the light guide plate and the inner surface of the housing, and the housing is provided near the light source and on the back surface of the light guide plate. A lighting device comprising a light-shielding portion for reflecting light reflected on an inner surface of the lighting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24349088A JP2714407B2 (en) | 1988-09-28 | 1988-09-28 | lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24349088A JP2714407B2 (en) | 1988-09-28 | 1988-09-28 | lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0294203A JPH0294203A (en) | 1990-04-05 |
| JP2714407B2 true JP2714407B2 (en) | 1998-02-16 |
Family
ID=17104666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24349088A Expired - Lifetime JP2714407B2 (en) | 1988-09-28 | 1988-09-28 | lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2714407B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4639716B2 (en) * | 2004-09-21 | 2011-02-23 | パナソニック電工株式会社 | Display lighting device |
| JP2007232790A (en) * | 2006-02-27 | 2007-09-13 | Inaba Denki:Kk | Illumination type display apparatus |
| JP2008139511A (en) * | 2006-11-30 | 2008-06-19 | Inaba Denki:Kk | Display plate for illumination type display device and illumination-type display device using the same |
| FR3026763B1 (en) | 2014-10-06 | 2017-11-17 | Soprema | PLATE SLOT TYPE COATING SYSTEM COMPRISING AT LEAST ONE CONTAINER |
-
1988
- 1988-09-28 JP JP24349088A patent/JP2714407B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0294203A (en) | 1990-04-05 |
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