JPH04336525A - Liquid crystal display device and electronic equipment - Google Patents
Liquid crystal display device and electronic equipmentInfo
- Publication number
- JPH04336525A JPH04336525A JP3109124A JP10912491A JPH04336525A JP H04336525 A JPH04336525 A JP H04336525A JP 3109124 A JP3109124 A JP 3109124A JP 10912491 A JP10912491 A JP 10912491A JP H04336525 A JPH04336525 A JP H04336525A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- liquid crystal
- crystal display
- display device
- electric power
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、液晶表示装置及び電子
機器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and electronic equipment.
【０００２】0002
【従来の技術】従来の液晶表示装置の構造を図４に示す
。図４において１は液晶表示部、２１及び２２は光源で
冷陰極管、熱陰極管などが使われている。９は拡散板で
光源２１及び光源２２から入ってきた光を液晶表示部１
へ均等に出力するためのものである。液晶表示装置が動
作している時は、光源２１および光源２２が両者とも点
灯し、液晶表示装置が動作していない時は、光源２１及
び光源２２が両者とも消灯し、どちらか一方の光源のみ
を点灯させることはできなかった。また従来の電子機器
は上記した液晶表示装置を使用していた。2. Description of the Related Art The structure of a conventional liquid crystal display device is shown in FIG. In FIG. 4, 1 is a liquid crystal display, and 21 and 22 are light sources, such as cold cathode tubes and hot cathode tubes. Reference numeral 9 denotes a diffuser plate that directs the light coming from the light sources 21 and 22 to the liquid crystal display section 1.
This is to output the data evenly. When the liquid crystal display device is operating, both the light source 21 and the light source 22 are turned on, and when the liquid crystal display device is not operating, both the light source 21 and the light source 22 are turned off, and only one of the light sources is turned on. I couldn't get it to light up. Further, conventional electronic devices have used the above-mentioned liquid crystal display device.
【０００３】0003
【発明が解決しようとする課題】しかし前述の従来技術
では、例えば液晶表示装置の動作電源として内部電源が
使用されている場合でも、動作電源として外部電源が使
用されている場合でも、同じだけの電力が消費されてし
まい、内部電源を使用しての長時間使用の防げとなって
しまう。そこで本発明はこのような課題を解決するもの
で、その目的とするところは、動作電源として内部電源
を使用している時の消費電力を減少させ、内部電源での
長時間使用を可能にするところにある。[Problems to be Solved by the Invention] However, in the above-mentioned prior art, for example, the same amount of energy is required regardless of whether an internal power source is used as the operating power source of the liquid crystal display device or an external power source is used as the operating power source. Power is consumed, and it becomes impossible to use the internal power supply for a long time. The present invention is intended to solve these problems, and its purpose is to reduce power consumption when using the internal power source as an operating power source, and to enable long-term use with the internal power source. There it is.
【０００４】0004
【課題を解決するための手段】本発明の液晶表示装置は
、液晶表示部を照明する少なくとも２灯以上の光源を備
えた液晶表示装置において、前記光源を全て点灯させる
こと及び少なくとも任意の１灯を消灯可能とする切り替
える手段を具備したことを特徴とする。[Means for Solving the Problems] The liquid crystal display device of the present invention is a liquid crystal display device equipped with at least two or more light sources for illuminating a liquid crystal display section, in which all of the light sources are turned on and at least one arbitrary light source is turned on. It is characterized by comprising a switching means for turning off the light.
【０００５】本発明の電子機器は、請求項１記載の液晶
表示装置を具備し、内部電源もしくは外部電源で動作す
る電子機器において、動作電源が内部電源か外部電源か
を検出する検出手段を備え、該検出手段により動作電源
が内部電源と判断せれた場合には該液晶表示装置の光源
の少なくとも１灯を消灯させ、また該検出手段により動
作電源が外部電源と判断された場合には該液晶表示装置
の光源の全てを点灯させることを特徴とする。[0005]An electronic device of the present invention includes a liquid crystal display device according to claim 1 and operates on an internal power source or an external power source, and includes a detection means for detecting whether the operating power source is an internal power source or an external power source. If the detection means determines that the operating power source is an internal power source, at least one of the light sources of the liquid crystal display device is turned off, and if the detection means determines that the operating power source is an external power source, the liquid crystal display device is turned off. The feature is that all the light sources of the display device are turned on.
【０００６】[0006]
（実施例１）図１において１は液晶表示部、２１及び２
２は光源で冷陰極管である。３は光源点灯装置である。
光源２１及び光源２２は光源の同時消灯が可能である。
光源点灯装置の詳細を図２に示す。図２においては５は
電源、２１及び２２は光源、Ｓ１及びＳ２はスイッチで
ある。４は直流交流変換昇圧器である。スイッチＳ１を
開くと光源２１及び光源２２は両者とも消灯する。スイ
ッチＳ１を閉じると、光源２１は点灯し光源２２はスイ
ッチＳ２によって制御され光源２１のみの点灯または光
源２１及び光源２２の両者点灯が可能となる。以上のよ
うに光源を点灯させたり消灯させたりすることにより消
費電力の調整ができるようになった。(Example 1) In FIG. 1, 1 is a liquid crystal display section, 21 and 2
2 is a light source, which is a cold cathode tube. 3 is a light source lighting device. The light sources 21 and 22 can be turned off simultaneously. Details of the light source lighting device are shown in FIG. 2. In FIG. 2, 5 is a power source, 21 and 22 are light sources, and S1 and S2 are switches. 4 is a DC/AC converter booster. When the switch S1 is opened, both the light source 21 and the light source 22 are turned off. When the switch S1 is closed, the light source 21 is turned on and the light source 22 is controlled by the switch S2, so that only the light source 21 can be turned on or both the light source 21 and the light source 22 can be turned on. As described above, power consumption can now be adjusted by turning on and off the light source.
【０００７】（実施例２）図３に本実施例の構成を示す
。図３において１，２１，２２，，４，Ｓ１，Ｓ２は実
施例１に示す液晶表示装置と同様のもので、６はパーソ
ナルコンピュータ本体、７は内部電源、８は外部電源、
Ｓ３は電源切換スイッチである。スイッチＳ１はパーソ
ナルコンピュータ本体６の電源スイッチとして使用され
ているものと同じものである。スイッチＳ２は電源切換
スイッチＳ３が外部電源８側になった場合に閉じるもの
とする。電源切換スイッチＳ３は外部電源８が接続され
ている場合には外部電源８側となり、外部電源８が接続
されていない場合には内部電源側となる。すなわち、外
部電源８が接続されている場合はスイッチＳ３は、外部
電源側となり、動作電源は外部電源８となりスイッチＳ
２が閉じ、光源２２及び光源２１の両者が点灯すること
になる。又、外部電源８が接続されていない場合はスイ
ッチＳ３は内部電源側となり、動作電源は内部電源７と
なり、スイッチＳ２が開き、光源２２が消灯し、光源２
１が点灯する。以上のように内部電源７によって動作し
ている場合には光源２２が消灯していることによって、
消費電力が減少し、内部電源での長時間使用が可能とな
った。(Embodiment 2) FIG. 3 shows the configuration of this embodiment. In FIG. 3, 1, 21, 22, 4, S1, and S2 are similar to the liquid crystal display device shown in Example 1, 6 is a personal computer main body, 7 is an internal power supply, 8 is an external power supply,
S3 is a power changeover switch. The switch S1 is the same as the one used as the power switch of the personal computer main body 6. It is assumed that the switch S2 is closed when the power source selector switch S3 is set to the external power source 8 side. The power source selector switch S3 is on the external power source 8 side when the external power source 8 is connected, and is on the internal power source side when the external power source 8 is not connected. That is, when the external power supply 8 is connected, the switch S3 becomes the external power supply side, and the operating power supply becomes the external power supply 8, and the switch S3 becomes the external power supply side.
2 is closed, and both the light source 22 and the light source 21 are turned on. In addition, when the external power source 8 is not connected, the switch S3 is on the internal power source side, the operating power source is the internal power source 7, the switch S2 is opened, the light source 22 is turned off, and the light source 2 is turned off.
1 lights up. As described above, when operating with the internal power supply 7, the light source 22 is turned off.
Power consumption has been reduced, making it possible to use the internal power supply for long periods of time.
【０００８】[0008]
【発明の効果】以上述べたように、本発明の液晶表示装
置は、複数個ある光源を全て点灯させたり、少なくとも
任意の１灯を消灯することができ、消費電力の調整がで
きるという効果を有する。Effects of the Invention As described above, the liquid crystal display device of the present invention has the effect of being able to turn on all of a plurality of light sources, or turn off at least one arbitrary light source, and adjust power consumption. have
【０００９】本発明の電子機器は、上記液晶表示装置を
具備した電子機器において、動作電源が外部電源の場合
は全ての光源を点灯させ、動作電源が内部電源の場合に
は複数個ある光源を少なくとも、任意の１灯を消灯する
ことによって消費電力を減少させ、内部電源での長時間
使用を可能にすることができるという効果を有する。In the electronic device of the present invention, in the electronic device equipped with the liquid crystal display device, all the light sources are turned on when the operating power source is an external power source, and when the operating power source is an internal power source, a plurality of light sources are turned on. At least, by turning off any one light, the power consumption can be reduced and the internal power supply can be used for a long time.
【図面の簡単な説明】[Brief explanation of drawings]
【図１】本発明の一実施例を示す図。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】図１の光源点灯装置の詳細を示す図。FIG. 2 is a diagram showing details of the light source lighting device in FIG. 1;
【図３】第２の本発明の一実施例を示す図。FIG. 3 is a diagram showing an embodiment of the second invention.
【図４】従来の液晶表示装置を示す図。FIG. 4 is a diagram showing a conventional liquid crystal display device.
１．液晶表示部 ２１．光源 ２２．光源 ３．光源点灯装置 ４．直流交流変換昇圧器 ５．電源 ６．パーソナルコンピュータ本体 ７．内部電源 ８．外部電源 ９．拡散板 Ｓ１．スイッチ Ｓ２．スイッチ Ｓ３．電源切り換えスイッチ 1. LCD display 21. light source 22. light source 3. Light source lighting device 4. DC/AC converter booster 5. power supply 6. personal computer body 7. internal power supply 8. external power supply 9. Diffusion plate S1. switch S2. switch S3. power selector switch
Claims (2)
の光源を備えた液晶表示装置において、前記光源を全て
点灯させること及び少なくとも任意の１灯を消灯可能と
する切り替え手段を具備したことを特徴とする液晶表示
装置。Claims: 1. A liquid crystal display device comprising at least two light sources for illuminating a liquid crystal display section, comprising a switching means for turning on all the light sources and turning off at least one arbitrary light source. Characteristic liquid crystal display device.
部電源もしくは外部電源で動作する電子機器において、
動作電源が内部電源か外部電源かを検出する検出手段を
備え、該検出手段により動作電源が内部電源と判断され
た場合には該液晶表示装置装置の光源の少なくとも１灯
を消灯させ、又該検出手段により動作電源が外部電源と
判断された場合には該液晶表示装置の光源の全てを点灯
させることを特徴とする電子機器。2. An electronic device comprising the liquid crystal display device according to claim 1 and operating on an internal power source or an external power source,
A detecting means for detecting whether the operating power source is an internal power source or an external power source is provided, and when the detecting means determines that the operating power source is the internal power source, at least one of the light sources of the liquid crystal display device is turned off; An electronic device characterized in that when the operating power source is determined to be an external power source by the detection means, all of the light sources of the liquid crystal display device are turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3109124A JPH04336525A (en) | 1991-05-14 | 1991-05-14 | Liquid crystal display device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3109124A JPH04336525A (en) | 1991-05-14 | 1991-05-14 | Liquid crystal display device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04336525A true JPH04336525A (en) | 1992-11-24 |
Family
ID=14502172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3109124A Pending JPH04336525A (en) | 1991-05-14 | 1991-05-14 | Liquid crystal display device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04336525A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5442367A (en) * | 1992-09-03 | 1995-08-15 | Sumitomo Metal Mining Co., Ltd. | Printed antenna with strip and slot radiators |
| EP1300824A2 (en) * | 2001-10-05 | 2003-04-09 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| JP2008016326A (en) * | 2006-07-06 | 2008-01-24 | Sharp Corp | Light source diagnostic device, display device, and starting method of display device |
-
1991
- 1991-05-14 JP JP3109124A patent/JPH04336525A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5442367A (en) * | 1992-09-03 | 1995-08-15 | Sumitomo Metal Mining Co., Ltd. | Printed antenna with strip and slot radiators |
| EP1300824A2 (en) * | 2001-10-05 | 2003-04-09 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| US6885360B2 (en) | 2001-10-05 | 2005-04-26 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| EP1300824A3 (en) * | 2001-10-05 | 2006-05-10 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| JP2008016326A (en) * | 2006-07-06 | 2008-01-24 | Sharp Corp | Light source diagnostic device, display device, and starting method of display device |
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