JPH06118412A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPH06118412A
JPH06118412A JP4267620A JP26762092A JPH06118412A JP H06118412 A JPH06118412 A JP H06118412A JP 4267620 A JP4267620 A JP 4267620A JP 26762092 A JP26762092 A JP 26762092A JP H06118412 A JPH06118412 A JP H06118412A
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
light
display device
emitting element
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
JP4267620A
Other languages
Japanese (ja)
Inventor
Masashi Miyashita
政士 宮下
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP4267620A priority Critical patent/JPH06118412A/en
Publication of JPH06118412A publication Critical patent/JPH06118412A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To perform the display recognition of a liquid crystal display device which utilizes only external light in a dark place and to drive a battery for a long time by providing an illumination means provided with a frame type photoconductor and a light source at the front of the display part of the liquid crystal display device. and which illuminates the front of the display part. CONSTITUTION:A light emitting element 2 is installed at the front side of a reflection type liquid crystal display panel 1 in the inside of a presser frame 4 as the light source to illuminate the reflection type liquid crystal display panel 1. The frame type photoconductor 3 is installed in a form to enclose the reflection type liquid crystal display panel 1 in the inside of the light emitting element 2 to illuminate the entire plane of the reflection type liquid crystal display panel 1 uniformly by the light of the light emitting element 2. Also, the transmission surface of the frame type photoconductor 3 is provided with irregularity to diffuse transmission light. The light emitting element 2 is set in a state where no light can be emitted in the case when the display recognition can be performed by the external light ordinarily, however, when it is judged that the display recognition is disabled only by the external light by a user, the user performs the display recognition by emitting the light by operating a switch by user oneself.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は外光を利用する液晶表示
装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device utilizing external light.

【0002】[0002]

【従来の技術】従来の外光を利用する液晶表示装置の照
明方法は、外光または液晶表示装置のケースから突出し
た構造である照明装置(光源)を使用するか、もしくは
図4に示すように透過型液晶表示パネル10の下部にバ
ックライト11を配し、照明を行っていた。
2. Description of the Related Art A conventional method for illuminating a liquid crystal display device using outside light is to use an illuminating device (light source) having a structure protruding from the case of the outside light or the liquid crystal display device, or as shown in FIG. A backlight 11 is arranged below the transmissive liquid crystal display panel 10 to illuminate the liquid crystal display panel 10.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来技術は外光利用のみに頼ると暗所では表示の認識が不
可能であり、また透過型液晶表示装置ではバックライト
を常時点灯しているため、多くの電力を消費し長時間の
バッテリー駆動による使用は困難で、また液晶表示装置
ケース表面から突出した照明装置を使用した場合、製品
の厚みが厚くなってしまうという欠点を有していた。更
に、反射型液晶表示装置からバックライトを用いた透過
型液晶表示装置に変更する際の製品開発費は、多大な費
用がかかっていた。
However, in the above-mentioned prior art, the display cannot be recognized in a dark place by relying only on the use of external light, and the backlight is always on in the transmissive liquid crystal display device. However, it has a drawback that it consumes a lot of power and it is difficult to use it for a long time driven by a battery, and when an illuminating device protruding from the surface of the liquid crystal display device case is used, the product becomes thick. Furthermore, the product development cost when changing from a reflective liquid crystal display device to a transmissive liquid crystal display device using a backlight is very expensive.

【0004】そこで、本発明は上記欠点を解決するため
に、その目的とするところは外光のみを利用する液晶表
示装置の暗所における表示の認識を可能にし、パートタ
イムに前記照明装置を点灯させることから長時間のバッ
テリー駆動を可能にする。また製品の厚みはバックライ
トを具備した透過型液晶表示装置と同等の製品を提供す
る。更に、既存の反射型液晶表示装置に本発明の照明装
置を設置することで、製品開発にかかる費用を抑えるこ
とである。
Therefore, in order to solve the above-mentioned drawbacks, the present invention aims to enable the recognition of a display in a dark place of a liquid crystal display device utilizing only external light, and turn on the lighting device at a part time. This allows battery operation for a long time. In addition, the product thickness is the same as that of a transmissive liquid crystal display device equipped with a backlight. Further, by installing the lighting device of the present invention in an existing reflective liquid crystal display device, it is possible to suppress the cost required for product development.

【0005】[0005]

【課題を解決するための手段】本発明の液晶表示装置
は、外光を利用する液晶表示装置において、前記液晶表
示装置の表示部前面に額縁型導光体と光源とを有し、前
記表示部前面を照明する照明手段を具備したことを特徴
とする。
According to another aspect of the present invention, there is provided a liquid crystal display device utilizing external light, which comprises a frame-shaped light guide and a light source in front of a display portion of the liquid crystal display device. It is characterized by comprising an illuminating means for illuminating the front surface of the section.

【0006】[0006]

【実施例】【Example】

〔実施例1〕本発明の一実施例を図1に示した液晶表示
装置の断面図を用いて説明する。図1に示した液晶表示
装置は反射型液晶表示パネル1を使用する。反射型液晶
表示パネル1に照明を行なうための光源として、発光素
子2が押え枠4内側の反射型液晶表示パネル1前面サイ
ドに設置されている。額縁型導光体3は発光素子2の光
りが均一に反射型液晶表示パネル1全面を照明するため
に、発光素子2の内側に反射型液晶表示パネル1を取り
囲む形で設置されている。また、額縁型導光体3の透過
面は透過光を拡散するために凹凸を持たせている。発光
素子2は通常外光により表示認識が可能な場合は発光し
ない状態にあるが、使用者が外光のみでは表示認識が不
可能と判断したときに自らスイッチを操作し発光をさ
せ、表示認識を可能にするものである。
[Embodiment 1] An embodiment of the present invention will be described with reference to the sectional view of the liquid crystal display device shown in FIG. The liquid crystal display device shown in FIG. 1 uses a reflective liquid crystal display panel 1. As a light source for illuminating the reflective liquid crystal display panel 1, a light emitting element 2 is installed inside the holding frame 4 on the front side of the reflective liquid crystal display panel 1. The frame-type light guide 3 is installed inside the light emitting element 2 so as to surround the reflective liquid crystal display panel 1 so that the light of the light emitting element 2 uniformly illuminates the entire surface of the reflective liquid crystal display panel 1. Further, the transmission surface of the frame-type light guide 3 is provided with irregularities so as to diffuse the transmitted light. The light emitting element 2 is normally in a state of not emitting light when display recognition is possible by outside light, but when the user determines that display recognition is not possible only by outside light, the user operates a switch to emit light and display recognition is performed. Is what makes it possible.

【0007】発光素子2の光源は、従来の透過型液晶表
示装置のバックライトと同等の冷陰極管(消費電力約
2.5W)を使用し、液晶表示装置内部の電源を使用し
て点灯させている。本実施例では外光を利用することが
可能な場合、照明は不要のため液晶表示装置全体の消費
電力は極端に小さくなる。従来の透過型液晶表示装置は
バックライトを常時点灯させるため、本実施例のように
通常は照明を行わず、使用者が必要とするときだけ照明
を行うようにすれば、従来よりはるかに液晶表示装置の
バッテリーによる駆動時間を延ばすことが可能である。
更に本実施例の製品の厚さは、従来のバックライトを用
いたものと同等である。
As a light source of the light emitting element 2, a cold cathode tube (power consumption of about 2.5 W) equivalent to a backlight of a conventional transmissive liquid crystal display device is used, and it is turned on by using a power source inside the liquid crystal display device. ing. In this embodiment, when external light can be used, no illumination is required, and the power consumption of the entire liquid crystal display device is extremely small. Since the conventional transmissive liquid crystal display device always turns on the backlight, if the user does not normally illuminate as in the present embodiment, but illuminates only when the user needs it, the liquid crystal will be much more liquid crystal than before. It is possible to extend the drive time of the display device using the battery.
Further, the thickness of the product of this embodiment is the same as that using the conventional backlight.

【0008】なお、発光素子2は冷陰極管をはじめとし
て、フィラメント球、高輝度発光ダイオード(LE
D)、ハロゲン球などでもよい。また、本実施例で用い
た額縁型導光体3は反射型液晶表示パネル1を4方向か
ら照明するように設置されているが、上下あるいは左右
のみの2方向から照明を行う方法でも、表示の認識は可
能である。また、本実施例では光源が1灯のものについ
て説明したが、光源を複数本使用しても良い。
The light emitting element 2 includes a cold cathode tube, a filament sphere, and a high brightness light emitting diode (LE).
D), a halogen bulb or the like may be used. Further, the frame-type light guide 3 used in the present embodiment is installed so as to illuminate the reflection type liquid crystal display panel 1 from four directions. Can be recognized. Further, although the case where the light source is one light source has been described in the present embodiment, a plurality of light sources may be used.

【0009】〔実施例2〕本発明の他の実施例を図2を
用いて説明する。図2は実施例1と同様に照明装置を反
射型液晶表示装置に設置したものの断面図である。本実
施例では図2に示すように、発光素子2と額縁型導光体
3およびプラスチックケース8をユニット化して、既存
の反射型液晶表示装置前面に設置している。つまり、本
実施例においては既存の反射型液晶表示装置を使用して
いるため、照明装置のみを開発するだけでよく、製品全
体の開発費を極端に少なくできる。その他は実施例1と
同様である。
[Embodiment 2] Another embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of a lighting device installed in a reflective liquid crystal display device as in the first embodiment. In this embodiment, as shown in FIG. 2, the light emitting element 2, the frame-shaped light guide 3 and the plastic case 8 are unitized and installed in front of the existing reflective liquid crystal display device. In other words, since the existing reflective liquid crystal display device is used in this embodiment, only the lighting device needs to be developed, and the development cost of the entire product can be extremely reduced. Others are the same as in the first embodiment.

【0010】〔実施例3〕本発明の他の実施例を図3を
用いて説明する。図3は実施例2に示した照明装置をユ
ニット化したものに、受光素子9を設置したものであ
る。これは、実施例1で述べたように液晶表示装置の使
用者の意志によって該照明装置のスイッチをON/OF
Fしていたのに対し、本実施例では受光素子9を設置す
ることで自動化したものである。つまり、点灯スイッチ
の代わりに受光素子9を設けることで、外光の照度を観
測し照度が一定基準以下になると発光を開始する。その
他は、実施例1、2と同様である。
[Embodiment 3] Another embodiment of the present invention will be described with reference to FIG. In FIG. 3, the light receiving element 9 is installed in a unit of the lighting device shown in the second embodiment. This is because the user of the liquid crystal display device turns on / off the switch of the lighting device as described in the first embodiment.
However, in the present embodiment, the light receiving element 9 is installed for automation. That is, by providing the light receiving element 9 instead of the lighting switch, the illuminance of external light is observed, and when the illuminance falls below a certain standard, light emission is started. Others are the same as in the first and second embodiments.

【0011】[0011]

【発明の効果】以上述べたとおり本発明によれば、外光
のみを利用する液晶表示装置において、表示認識に充分
な外光が得られないときに、製品に装備された照明装置
を点灯することで暗所での表示認識が可能になり、かつ
必要な時だけ点灯することで従来の常時光源点灯の透過
型液晶表示装置に比較して消費電力を極端に減少するこ
とができ、バッテリー駆動の時間を延ばすことができる
という効果を有する。
As described above, according to the present invention, in a liquid crystal display device that uses only external light, when the external light sufficient for display recognition cannot be obtained, the lighting device provided in the product is turned on. This makes it possible to recognize the display in a dark place, and by turning on only when necessary, it is possible to dramatically reduce power consumption compared to conventional transmissive liquid crystal display devices with constant light source lighting and battery drive. The effect is that the time can be extended.

【0012】また、製品の厚みは従来のバックライトを
用いて照明を行っていた透過型液晶表示装置と同等のも
のを提供できるという効果を有する。
Further, there is an effect that it is possible to provide the same product thickness as the transmissive liquid crystal display device which is illuminated by using the conventional backlight.

【0013】更に、光源の照明装置をユニット化し既存
の製品に設置するだけで、外光が利用できないときの光
源が確保できるため、製品の開発にかかる費用を抑える
ことができるという効果を有する。
Furthermore, since the light source can be secured when external light cannot be used by simply unitizing the lighting device for the light source and installing it in an existing product, there is an effect that the cost required for product development can be suppressed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例1を示す液晶表示装置断面図。FIG. 1 is a sectional view of a liquid crystal display device showing a first embodiment of the present invention.

【図2】本発明の実施例2を示す液晶表示装置断面図。FIG. 2 is a sectional view of a liquid crystal display device showing a second embodiment of the present invention.

【図3】本発明の実施例3を示す液晶表示装置断面図。FIG. 3 is a sectional view of a liquid crystal display device showing a third embodiment of the present invention.

【図4】従来の照明装置付き透過型液晶表示装置の構造
を示す断面図。
FIG. 4 is a sectional view showing a structure of a conventional transmissive liquid crystal display device with an illuminating device.

【符号の説明】[Explanation of symbols]

1.反射型液晶表示パネル 2.発光素子 3.額縁型導光体 4.押さえ枠 5.スペーサー 6.導電ゴム 7.基板 8.プラスチックケース 9.受光素子 10.透過型液晶表示パネル 11.バックライト 1. Reflective liquid crystal display panel 2. Light emitting element 3. Frame type light guide 4. Holding frame 5. Spacer 6. Conductive rubber 7. Substrate 8. Plastic case 9. Light receiving element 10. Transmissive liquid crystal display panel 11. Backlight

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】外光を利用する液晶表示装置において、前
記液晶表示装置の表示部前面に額縁型導光体と光源とを
有し、前記表示部前面を照明する照明手段を具備したこ
とを特徴とする液晶表示装置。
1. A liquid crystal display device utilizing external light, comprising a frame-shaped light guide and a light source on the front surface of the display portion of the liquid crystal display device, and comprising illuminating means for illuminating the front surface of the display portion. Characteristic liquid crystal display device.
【請求項2】前記照明手段をユニット化したことを特徴
とする請求項1記載の液晶表示装置。
2. The liquid crystal display device according to claim 1, wherein the illuminating means is unitized.
【請求項3】前記照明手段にON/OFFを制御する手
段を具備してなることを特徴とする請求項1記載の液晶
表示装置。
3. A liquid crystal display device according to claim 1, wherein said lighting means comprises means for controlling ON / OFF.
【請求項4】前記照明手段が前記液晶表示装置に着脱可
能であることを特徴とする請求項1記載の液晶表示装
置。
4. The liquid crystal display device according to claim 1, wherein the illumination means is attachable to and detachable from the liquid crystal display device.
JP4267620A 1992-10-06 1992-10-06 Liquid crystal display device Pending JPH06118412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4267620A JPH06118412A (en) 1992-10-06 1992-10-06 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4267620A JPH06118412A (en) 1992-10-06 1992-10-06 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPH06118412A true JPH06118412A (en) 1994-04-28

Family

ID=17447225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4267620A Pending JPH06118412A (en) 1992-10-06 1992-10-06 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPH06118412A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001356323A (en) * 2000-06-15 2001-12-26 Citizen Watch Co Ltd Liquid crystal display device
JP2021162676A (en) * 2020-03-31 2021-10-11 本田技研工業株式会社 Information display apparatus
JP2022109273A (en) * 2020-03-31 2022-07-27 本田技研工業株式会社 Information display apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001356323A (en) * 2000-06-15 2001-12-26 Citizen Watch Co Ltd Liquid crystal display device
JP2021162676A (en) * 2020-03-31 2021-10-11 本田技研工業株式会社 Information display apparatus
JP2022109273A (en) * 2020-03-31 2022-07-27 本田技研工業株式会社 Information display apparatus

Similar Documents

Publication Publication Date Title
JP3515355B2 (en) Liquid crystal display
KR970004776B1 (en) Data display radio pager
JPH0593908A (en) Liquid crystal display device
JPH06118412A (en) Liquid crystal display device
JPS61285429A (en) Liquid crystal flat panel display
JP3119244B2 (en) Backlight structure of liquid crystal display
JP4366682B2 (en) Liquid crystal display
JP3052932B2 (en) Display device and display surface illumination method
JPH05150237A (en) Surface illumination device
JP3097728B2 (en) Backlight device and liquid crystal display device
JPH0437718A (en) Liquid crystal display device
JP2000075289A (en) Liquid crystal display device
KR0127885Y1 (en) Illumination system of liquid crystal module
JP2560515B2 (en) Color liquid crystal display
JP3752333B2 (en) Mobile device
KR940003273Y1 (en) Liquid crystal display devices
JPH11167111A (en) Reflection type liquid crystal display device
JPH0212125A (en) Liquid crystal display device
JPH04333023A (en) Lighting device and electronic equipment using the same
KR100534004B1 (en) Clock with backlight
JPH06332386A (en) Liquid crystal display device
JPS61256374A (en) Display unit
JPH0746906Y2 (en) Structure of retaining bracket for LCD
TWI392912B (en) A liquid crystal display having an energy-saving indicator and the energy-saving method applied thereon
JPS6318328A (en) External light reflecting device for liquid crystal television receiver