JPS59212876A - Display - Google Patents

Display

Info

Publication number
JPS59212876A
JPS59212876A JP8787483A JP8787483A JPS59212876A JP S59212876 A JPS59212876 A JP S59212876A JP 8787483 A JP8787483 A JP 8787483A JP 8787483 A JP8787483 A JP 8787483A JP S59212876 A JPS59212876 A JP S59212876A
Authority
JP
Japan
Prior art keywords
light
plate
light source
display
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.)
Pending
Application number
JP8787483A
Other languages
Japanese (ja)
Inventor
文夫 上田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8787483A priority Critical patent/JPS59212876A/en
Publication of JPS59212876A publication Critical patent/JPS59212876A/en
Pending legal-status Critical Current

Links

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は透過型液晶表示素子や透光性印刷物などに代表
される透光性表示板を用いた表示装置に関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device using a translucent display plate, typified by a transmissive liquid crystal display element, a translucent printed matter, and the like.

従来、この種の装置として第1図に示すものおよび第2
図に示すものがあった。第1図において、1は透過型液
晶表示素子などから成る透光性表示板、2は螢光灯など
の光源、3は透明プラスチック製の導光板、3aは白色
ペイント印刷などによる光散乱反射層である。
Conventionally, as this type of device, the one shown in FIG. 1 and the one shown in FIG.
There was something shown in the figure. In FIG. 1, 1 is a translucent display plate made of a transmissive liquid crystal display element, 2 is a light source such as a fluorescent lamp, 3 is a light guide plate made of transparent plastic, and 3a is a light scattering and reflective layer made of white paint printing etc. It is.

上記装置において、光源2から出た光の一部は導光板3
の端部よシ入り、内部を全反射しながら進んで行く。そ
の過程で光散乱反射層3aに至った成分のいくらかが全
反射の条件を満たさなくなり、透光性表示板1に向って
出射される。その結果、透光性表示板1の背面照明が達
成される。
In the above device, a part of the light emitted from the light source 2 is transmitted to the light guide plate 3.
The light enters the edge of the body and moves forward while being totally reflected inside. During this process, some of the components that have reached the light scattering and reflective layer 3a no longer satisfy the conditions for total reflection and are emitted toward the light-transmitting display panel 1. As a result, back illumination of the translucent display panel 1 is achieved.

しかるに、上記装置では光源2が導光板3の一端に配設
されているために明るさにムラが生じるという欠点があ
った。このため、光散乱反射層3aの散乱性に分布を付
けて明るさのムラを減じるようにしたものもあるが、こ
の場合でも導光板3の端面を大きくできないので光源2
から出た光の多くが導光板3以外の方向へ散り失せてし
まい、結局総合的には光利用効率が極めて悪いものであ
った。
However, the above device has a drawback in that the light source 2 is disposed at one end of the light guide plate 3, resulting in uneven brightness. For this reason, some devices have distributed the scattering properties of the light scattering and reflective layer 3a to reduce unevenness in brightness, but even in this case, the end face of the light guide plate 3 cannot be made large, so the light source 2
Much of the light emitted from the light guide plate 3 was scattered in directions other than the light guide plate 3, resulting in an extremely poor overall light utilization efficiency.

又、第2図において、2は冷隘極放電管などの光源、5
はアルミ板を凹曲面にした光反射板、 5aは乳白色の
アクリル板などの光散乱透過板である。
In addition, in FIG. 2, 2 is a light source such as a cold polar discharge tube, and 5 is a light source such as a cold polar discharge tube.
5a is a light reflecting plate made of an aluminum plate with a concave curved surface, and 5a is a light scattering and transmitting plate such as a milky white acrylic plate.

上記構成において、光源2を出た光の多くは直接あるい
は光反射板5で反射されてから光散乱逍過板5aに至る
。この光の多くは光散乱透過板5aを透過して透光性表
示板1に向って散乱出射される。その結果、遮光性表示
板4の背面照明が達成される。
In the above configuration, most of the light emitted from the light source 2 reaches the light scattering plate 5a either directly or after being reflected by the light reflecting plate 5. Most of this light passes through the light scattering and transmitting plate 5a and is scattered and emitted toward the translucent display plate 1. As a result, back illumination of the light-shielding display panel 4 is achieved.

第2図の従来装置においては、光源2から出た光のほと
んどを直接あるいは光反射板5で反射して光散乱透過板
5aに集めている点で優れているが、透光性表示板1方
向への光の出射強度分布を均一にするためあるいは光源
2が直接見えてし壕い荷置との輝度ムラが生じるのを避
けるために充分に光散乱恰の強い光散乱透過板5aを遮
光性表示板1と光源2との間に設ける必要があり、結局
特足の方向からしか見ない用途のものとしては光利用効
率が悪いものであった。
The conventional device shown in FIG. 2 is superior in that most of the light emitted from the light source 2 is reflected directly or by the light reflecting plate 5 and collected on the light scattering and transmitting plate 5a. In order to make the light output intensity distribution uniform in the direction or to avoid the light source 2 being directly visible and causing uneven brightness with the trenched cargo storage, the light scattering and transmitting plate 5a having a sufficiently strong light scattering property is shielded from light. It is necessary to provide the light source between the gender display plate 1 and the light source 2, and as a result, the light utilization efficiency is poor as it is intended to be viewed only from a particular direction.

本発明は上記した従来の欠点を除去するために成された
ものであり、広光性表示板、光反射板および光源をアイ
レンジ(表示を見る人の目が通常位置する範囲)の方向
との関連で特定の位置関係に配設することにより高輝度
で均一照明の透光性表示板を用いた表示装置を提供する
ことを目的とする。
The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and aims to align a wide-light display board, a light reflection board, and a light source with the direction of the eye range (the range where the eyes of the person viewing the display are normally located). A related object of the present invention is to provide a display device using a translucent display plate that provides high brightness and uniform illumination by arranging it in a specific positional relationship.

以下、本発明の実施例を図面とともに説明する。Embodiments of the present invention will be described below with reference to the drawings.

第3図において、1は透過型の液晶表示素子などから成
る透光性表示板、2は冷陰極放電管あるいは螢光灯など
の棒状の光源、2aは光源2をおおうように設けられ、
鏡面アルミ板を小さなトイ状に成形した光源補助手段、
6は鏡面アルミ板などをトイ状に成形した光反射板、4
はアイレンツである。
In FIG. 3, 1 is a translucent display plate made of a transmissive liquid crystal display element, 2 is a rod-shaped light source such as a cold cathode discharge tube or a fluorescent lamp, and 2a is provided to cover the light source 2.
A light source auxiliary means made of a mirror aluminum plate shaped into a small toy.
6 is a light reflecting plate formed into a toy shape from a mirrored aluminum plate, etc.;
is Eyrenz.

上記構成において、光反射板6の断面形状は楕円の一部
に似せてあり、光源2とアイレンツ4は夫々上記楕円の
焦点位置あるいはその近傍に配設されている。透光性表
示板1はその有効表示域eが光反射板6とアイレンツ4
との間にくるように配置され、光反射板6で反射された
成分のみが有効表示域eを通過してアイレンツ4に至る
ような位置に配設されている。換言すれば、光源2を出
て直接アイレンツ4に向かおうとする光は透光性表示板
1の有効表示域e以外の個所あるいは別に設けたマスク
体で吸収あるいは反射され、アイレンツ4へ直接達する
ことがないように透光性表示板1、光反射板6および光
源2が配置されている。
In the above configuration, the cross-sectional shape of the light reflecting plate 6 resembles a part of an ellipse, and the light source 2 and the eye lenses 4 are respectively disposed at or near the focal point of the ellipse. The translucent display board 1 has an effective display area e that is connected to the light reflector 6 and the eye lens 4.
It is arranged at such a position that only the component reflected by the light reflecting plate 6 passes through the effective display area e and reaches the eye lenses 4. In other words, the light that leaves the light source 2 and goes directly to the eye lens 4 is absorbed or reflected by a part other than the effective display area e of the translucent display panel 1 or a separately provided mask body, and reaches the eye lens 4 directly. The translucent display plate 1, the light reflecting plate 6, and the light source 2 are arranged so as to prevent the display from occurring.

光源補助手段2aは、アイレンツ4の近くであれば、ア
イレンジ4以外の位置へも光反射板3で反射された光が
達するように光源2f:取囲み、光反射板6方向に開い
た位置に配設されている。
If the light source auxiliary means 2a is near the eye range 4, the light source 2f is located at a position surrounded by the light reflector 6 and opened in the direction of the light reflector 6 so that the light reflected by the light reflector 3 reaches positions other than the eye range 4. It is located in

上記装置においては、光源2を出だ光の多くが光反射板
6で反射され、遮光性表示板1に至る。
In the above device, most of the light emitted from the light source 2 is reflected by the light reflecting plate 6 and reaches the light-shielding display plate 1.

この光のうち、有効表示域eに入射したものが透光性表
示板1′f:通過してアイレンジ4に至る。その結果、
透光性表示板1の背面照明が達成される。
Of this light, that which is incident on the effective display area e passes through the translucent display plate 1'f and reaches the eye range 4. the result,
Back lighting of the translucent display panel 1 is achieved.

光源2から光反射板6以外の方向へ向った光のうち、ア
イレンジ4に向った光は遮光性表示板1の有効表示域e
以外の領域で吸収あるいは反射され、または光源補助部
材2aの一部で反射される。このため、アイレンツ4か
ら表示装置を見たときに光源2が直接見えてまぶしいと
、いうことはない。
Of the light directed from the light source 2 in a direction other than the light reflecting plate 6, the light directed toward the eye range 4 is reflected in the effective display area e of the light-shielding display board 1.
The light is absorbed or reflected in other areas, or reflected by a part of the light source auxiliary member 2a. Therefore, when viewing the display device from the eye lens 4, the light source 2 is not directly visible and dazzling.

結局、この表示装置では、アイレンツ4から見たとき透
光性表示板1の有効表示域eの背景には光源2の光反射
板6による反射像が見えることになる。
After all, in this display device, when viewed from the eye lens 4, the reflected image of the light source 2 by the light reflecting plate 6 is visible in the background of the effective display area e of the translucent display plate 1.

尚、上記実施例では光源2として棒状のものを用いたが
、球状又は面状のものであっても良い。
In the above embodiment, a rod-shaped light source 2 is used, but it may be spherical or planar.

又、光反射板6はその断面形状が楕円状に限られるもの
ではなく、放物線状9円状、折線状あるいはそれらの回
転面状であっても良く、要は凹曲面状であれば良い。又
、光源補助手段2aは必ずしも必要でないが、視角を広
げる上で役立つものであって、光反射板6と同様の形状
の反射体あるいはレンズもしくはプリズムなどでも良い
。透光性表示板1は遮光性の印刷物などであっても良い
Further, the cross-sectional shape of the light reflecting plate 6 is not limited to an elliptical shape, but may be a parabolic nine-circle shape, a broken line shape, or a rotating surface thereof, and in short, a concave curved shape is sufficient. Although the light source auxiliary means 2a is not necessarily necessary, it is useful for widening the viewing angle, and may be a reflector, a lens, a prism, or the like having the same shape as the light reflecting plate 6. The light-transmitting display board 1 may be a light-shielding printed matter or the like.

又、このような表示装置を複数組み合せ、ランプあるい
はランプと液晶表示素子を連動点滅させて各種の表示機
能を持たせるようにしても良い。さらに、光源2から透
光性表示板1までの光路内のいずれかに、例えば透光性
表示板1に少し光散乱性を有するシートするいは透明イ
ンキ印刷シートを重ねて配置するとか、光反射板6にヘ
アラインあるいはしぼりを入れるあるいは透明ラッカー
をコートするとかにより、わずかの光散乱性を付与し、
光の出射角度を少し広げても良い。
Further, a plurality of such display devices may be combined, and a lamp or a lamp and a liquid crystal display element may be blinked in conjunction to provide various display functions. Further, in any part of the optical path from the light source 2 to the translucent display plate 1, for example, a sheet having a slight light scattering property or a transparent ink printed sheet may be placed over the translucent display plate 1, or A slight light scattering property is imparted to the reflector plate 6 by adding a hairline or a squeeze or coating it with transparent lacquer.
It is also possible to slightly widen the light emission angle.

以上のように本発明においては、光源、凹曲面状の光反
射板および透光性表示板を備え、アイレンジから見て透
光性表示板の後方に配置された光源からの光が光反射板
で反射されてから旋光性表示板の表示域を通過し、アイ
レンツに至るように光反射板を配置しているので、透光
性表示板の有効表示域後方に光源の反射像をアイレンジ
から見ることになり、螢光灯あるいは冷陰極放電管など
の発光輝度に光反射板の反射率を乗じた程度の背面照明
が達成され、従来のものより大幅に高いレベルの明るさ
の背面照明が達成される。又、光源の反射像を照明光源
としているので照明輝度はアイレンツから見たときおの
ずから極めて均一なも′のとなる。結局、本発明によれ
は、総合的にみて光利用効率の高い表示装置が実現でき
る。
As described above, the present invention includes a light source, a concave light reflection plate, and a translucent display plate, and the light from the light source disposed behind the translucent display plate when viewed from the eye range is reflected. The light reflecting plate is arranged so that the light is reflected by the plate, passes through the display area of the optically active display plate, and reaches the eye lens, so the reflected image of the light source is reflected from the eye range behind the effective display area of the translucent display plate. This achieves backlighting that is equivalent to the luminance of a fluorescent lamp or cold cathode discharge tube multiplied by the reflectance of the light reflector, and has a much higher level of brightness than conventional backlighting. is achieved. Furthermore, since the reflected image of the light source is used as the illumination light source, the illumination brightness is naturally extremely uniform when viewed from the eye lens. In the end, according to the present invention, a display device with high overall light utilization efficiency can be realized.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図および第2図は夫々従来装置の構成図、第3図は
本発明装置の構成図である。 l・・・透過性表示板、2・・・光源、2a・・・光源
補助手段、4・・・アイ、し/ソ、6・・・光反射板、
e・・・有効表示域。 尚、図中同一符号は同−又は相当部分を示す。 代理人  大 岩 増 雄
FIGS. 1 and 2 are block diagrams of conventional devices, respectively, and FIG. 3 is a block diagram of the device of the present invention. l... Transmissive display plate, 2... Light source, 2a... Light source auxiliary means, 4... Eye, Shi/So, 6... Light reflecting plate,
e...Effective display area. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa

Claims (1)

【特許請求の範囲】[Claims] (1)透光性表示板、凹曲面状の光反射板および光源を
備え、アイレンジから見て透光性表示板の後方に配置さ
れた光源からの光が光反射板で反射されてから透光性表
示板の表示域を通過し、アイレンジに至るよう罠光反射
板を配置したことを特徴とする表示装置。
(1) Equipped with a translucent display board, a concave light reflector, and a light source, the light from the light source placed behind the translucent display board when viewed from the eye range is reflected by the light reflector. A display device characterized in that a trap light reflecting plate is arranged so as to pass through the display area of a translucent display plate and reach an eye range.
JP8787483A 1983-05-17 1983-05-17 Display Pending JPS59212876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8787483A JPS59212876A (en) 1983-05-17 1983-05-17 Display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8787483A JPS59212876A (en) 1983-05-17 1983-05-17 Display

Publications (1)

Publication Number Publication Date
JPS59212876A true JPS59212876A (en) 1984-12-01

Family

ID=13927011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8787483A Pending JPS59212876A (en) 1983-05-17 1983-05-17 Display

Country Status (1)

Country Link
JP (1) JPS59212876A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000052667A1 (en) * 1999-03-02 2000-09-08 Matsushita Electric Industrial Co., Ltd. Illuminating device and display device provided with the device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554066A (en) * 1978-06-26 1980-01-12 Suwa Seikosha Kk Reflector for liquid crystal display unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554066A (en) * 1978-06-26 1980-01-12 Suwa Seikosha Kk Reflector for liquid crystal display unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000052667A1 (en) * 1999-03-02 2000-09-08 Matsushita Electric Industrial Co., Ltd. Illuminating device and display device provided with the device

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