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JPH04174819A - Liquid crystal display - Google Patents

Liquid crystal display

Info

Publication number
JPH04174819A
JPH04174819A JP2303458A JP30345890A JPH04174819A JP H04174819 A JPH04174819 A JP H04174819A JP 2303458 A JP2303458 A JP 2303458A JP 30345890 A JP30345890 A JP 30345890A JP H04174819 A JPH04174819 A JP H04174819A
Authority
JP
Japan
Prior art keywords
light
liquid crystal
crystal display
controller
light intensity
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
JP2303458A
Other languages
Japanese (ja)
Inventor
Hidenori Egawa
秀範 江川
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP2303458A priority Critical patent/JPH04174819A/en
Publication of JPH04174819A publication Critical patent/JPH04174819A/en
Pending legal-status Critical Current

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  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

PURPOSE:To automatically adjust the brightness of a screen by detecting environmental light by means of a light detector and adjusting the quantity of light while adjusting a controller. CONSTITUTION:The function of a calibration curve indicating the relation between environmental light and the light intensity of back light giving to a liquid crystal display plate 2a is stored in a memory 6. In the next step, the light around the place on which this word processor is put is detected as light intensity by a light detector 3, and the light intensity signal which is output from the light detector 3 is converted into a digital signal by a controller 5. In the next step, the light intensity signal of the back light corresponding to this digital signal is extracted from the memory 6, and light intensity output is sent from the controller 5 to the back light 4. By this constitution, the liquid crystal display plate 2a can be adjusted to proper light, and the brightness of the screen can be made to automatically follow the variation of environmental light.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、液晶表示装置に関し、特にパソコンやワープ
ロ等に使用されるバックライトをもつ液晶表示装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device with a backlight used in personal computers, word processors, and the like.

〔従来の技術〕[Conventional technology]

第４図は従来の液晶表示装置の一例のものを組込むワー
プロを示す斜視図である。従来、この種の液晶表示装置
は、例えば、第４図に示すように、ワープロ本体１に蝶
番により接続されている。また、この液晶表示装置は、
ケース２と、ケース２の一面に取付けられる液晶表示板
２ａと、ケース２内に液晶表示板２ａに対向して取付け
られるバックライト（図示せず）と、ケース２の面に液
晶表示板２ａに並べて配置するとともにバックライトの
光強度を調節する調節ボタン３とを有していた。FIG. 4 is a perspective view showing a word processor incorporating an example of a conventional liquid crystal display device. Conventionally, this type of liquid crystal display device is connected to a word processor main body 1 by a hinge, for example, as shown in FIG. In addition, this liquid crystal display device
A case 2, a liquid crystal display board 2a attached to one side of the case 2, a backlight (not shown) attached inside the case 2 facing the liquid crystal display plate 2a, and a backlight (not shown) attached to the liquid crystal display plate 2a on the surface of the case 2. It had an adjustment button 3 arranged side by side and for adjusting the light intensity of the backlight.

この液晶表示装置を使用して、ワープロを操作する場合
は、操作者が周囲の明るさに応じて、液晶表示板２ａに
表示される字句あるいは記号等を見易いように、調節ボ
タン３を操作し、バックライトの明るさを調節していた
。When operating a word processor using this liquid crystal display device, the operator should operate the adjustment button 3 to make it easier to see the words, symbols, etc. displayed on the liquid crystal display board 2a according to the surrounding brightness. , the brightness of the backlight was adjusted.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、従来の表示装置では、周囲の明るさが変
化してもそれに自動的に追従出来ず、利用者の気付かな
いうちに、不適性な光強度となっている場合がしばしば
ある。特に、最近ではラップトツブパソコン等の普及に
より使用環境が目まぐるしく変化する場合が多くなって
来ており、調節の頻度も増加しているため、操作自体も
利用者の負担になりつつある。However, conventional display devices cannot automatically follow changes in ambient brightness, and the light intensity often becomes inappropriate without the user noticing. In particular, with the recent spread of laptop computers and the like, the environment in which they are used has often changed rapidly, and the frequency of adjustments has also increased, making the operation itself a burden on users.

本発明の目的は、かかる問題を解消すべく、画面の明る
さを自動的に調節出来る液晶表示装置を提供することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device that can automatically adjust screen brightness in order to solve this problem.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の液晶表示装置は、液晶表示板と、この液晶表示
板の裏面側より光を照射するバックライトと、このバッ
クライトの光量を調節するコントローラと、前記液晶表
示板と並べて配置される光検知器とを備え、この光検知
器により周囲の明るさを検知し、前記コントローラを調
節し、前記バックライトの光量を調節することを特徴と
している。The liquid crystal display device of the present invention includes a liquid crystal display plate, a backlight that emits light from the back side of the liquid crystal display plate, a controller that adjusts the amount of light of the backlight, and a light source that is arranged in parallel with the liquid crystal display plate. A detector is provided, and the light detector detects ambient brightness, adjusts the controller, and adjusts the amount of light of the backlight.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例の液晶表示装置を組込むワー
プロの斜視図、第２図は第１図の液晶表示装置の構成を
示す図である。この液晶表示装置は、第１図に示すよう
に、周囲の明るさを検知する光検出器３を液晶表示板２
ａを並べてケース２に配置したことである。FIG. 1 is a perspective view of a word processor incorporating a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the structure of the liquid crystal display device of FIG. 1. As shown in FIG. 1, in this liquid crystal display device, a photodetector 3 for detecting ambient brightness is connected to a liquid crystal display plate 2.
a are arranged side by side in case 2.

箆な、この液晶表示装置は、第２図に示すように、光検
出器３より出力される光検知信号を入力し、あらかじめ
光検知信号と光強度との相関を記憶するメモリ６と、こ
のメモリ６より出力される信号に応じてバックライト４
の光強度を調節するコントローラ５とを設けることであ
る。As shown in FIG. 2, this liquid crystal display device includes a memory 6 that inputs the light detection signal output from the photodetector 3 and stores in advance the correlation between the light detection signal and the light intensity. The backlight 4 responds to the signal output from the memory 6.
A controller 5 is provided to adjust the light intensity of the light.

第３図は周囲の明るさとバックライト光強度の関係を示
すグラフである０次に、この表示装置の動作を説明する
。まず、第３図に示すように、周囲の明るさと、液晶表
示板に与えるバックライトの光強度の関係を示す校正曲
線の間数をメモリ６に予め記憶させる０次に、このワー
プロの置かれる周囲の明るさを光強度として光検知器３
で検知する。次に、光検知器３から出力される光強度信
号をコントローラ５により、ディジタル信号に変換する
。このデジタル信号に対応するバックライトの光強度信
号をメモリ６より抽出し、コントローラ５からバックラ
イト４に光強度出力を送る。FIG. 3 is a graph showing the relationship between ambient brightness and backlight intensity. Next, the operation of this display device will be explained. First, as shown in FIG. Photodetector 3 uses ambient brightness as light intensity
Detect with. Next, the light intensity signal output from the photodetector 3 is converted into a digital signal by the controller 5. A backlight light intensity signal corresponding to this digital signal is extracted from the memory 6, and the light intensity output is sent from the controller 5 to the backlight 4.

このことにより、液晶表示板２ａは適切な明るさに調節
される。As a result, the brightness of the liquid crystal display panel 2a is adjusted to an appropriate level.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、液晶表示板と並べて配置
される周囲の明るさを定量的に検知する光検知器と、こ
の光検知器の検知する光量によりバックライトの光強度
を調節するコントローラとを備えることによって、周囲
の明るさに応じて液晶表示板の明るさを自動的に調整出
来る液晶表示装置が得られるという効果がある。As explained above, the present invention includes a photodetector that quantitatively detects the brightness of the surroundings, which is placed side by side with a liquid crystal display panel, and a controller that adjusts the light intensity of a backlight based on the amount of light detected by the photodetector. By including the above, it is possible to obtain a liquid crystal display device that can automatically adjust the brightness of the liquid crystal display panel according to the surrounding brightness.

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

第１図は、本発明の一実施例における液晶表示装置を組
込むワープロの斜視図、第２図は第１図の液晶表示装置
の校正を示す図、第３図は周囲の明るさをバックライト
光硬度の関係を示すグラフ、第４図は従来の一例におけ
る液晶表示装置を組込むワープロの斜視図である。 １・・・ワープロ本体、２・・・ケース、２ａ・・・液
晶表示板、３・・・光検知器、４・・・バックライト、
５・・・コントローラ、６・・・メモリ。FIG. 1 is a perspective view of a word processor incorporating a liquid crystal display device according to an embodiment of the present invention, FIG. 2 is a diagram showing calibration of the liquid crystal display device of FIG. FIG. 4, a graph showing the relationship between optical hardness, is a perspective view of a word processor incorporating a conventional example of a liquid crystal display device. 1... Word processor body, 2... Case, 2a... Liquid crystal display board, 3... Photodetector, 4... Backlight,
5...Controller, 6...Memory.

Claims (1)

【特許請求の範囲】[Claims] 液晶表示板と、この液晶表示板の裏面側より光を照射す
るバックライトと、このバックライトの光量を調節する
コントローラと、前記液晶表示板と並べて配置される光
検知器とを備え、この光検知器により周囲の明るさを検
知し、前記コントローラを調節し、前記バックライトの
光量を調節することを特徴とする液晶表示装置。It includes a liquid crystal display board, a backlight that emits light from the back side of the liquid crystal display board, a controller that adjusts the amount of light of the backlight, and a photodetector that is arranged in parallel with the liquid crystal display board. A liquid crystal display device, characterized in that a detector detects ambient brightness, adjusts the controller, and adjusts the amount of light of the backlight.
JP2303458A 1990-11-08 1990-11-08 Liquid crystal display Pending JPH04174819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2303458A JPH04174819A (en) 1990-11-08 1990-11-08 Liquid crystal display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2303458A JPH04174819A (en) 1990-11-08 1990-11-08 Liquid crystal display

Publications (1)

Publication Number Publication Date
JPH04174819A true JPH04174819A (en) 1992-06-23

Family

ID=17921221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2303458A Pending JPH04174819A (en) 1990-11-08 1990-11-08 Liquid crystal display

Country Status (1)

Country Link
JP (1) JPH04174819A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5636041A (en) * 1995-05-24 1997-06-03 Dell Usa, L.P. Technique for increasing the visibility of an LCD panel during warm-up thereof
JPH09146073A (en) * 1995-11-21 1997-06-06 Nec Corp Back light control circuit for liquid crystal display device
JP2000250455A (en) * 1999-02-26 2000-09-14 Matsushita Electric Ind Co Ltd Information processing device
US7388569B2 (en) 2001-12-10 2008-06-17 Mitsubishi Denki Kabushiki Kaisha Reflection liquid crystal display apparatus
US7863660B2 (en) 2005-05-31 2011-01-04 Sharp Kabushiki Kaisha Photodiode and display device
US7898619B2 (en) 2005-04-28 2011-03-01 Sharp Kabushiki Kaisha Liquid crystal display
US7903214B2 (en) 2005-04-28 2011-03-08 Sharp Kabushiki Kaisha Liquid crystal display device comprising an optical sensor for detecting the intensity of ambient light
US8063866B2 (en) 2007-11-15 2011-11-22 Toshiba Matsushita Display Technology Co., Ltd. Display device capable of measuring an illuminance and widening a dynamic range of the measured illuminance
US8085256B2 (en) 2005-04-28 2011-12-27 Sharp Kabushiki Kaisha Electronic device
US8194304B2 (en) 2005-06-03 2012-06-05 Sharp Kabushiki Kaisha Display device and electric apparatus using the same
US8780033B2 (en) 2008-09-09 2014-07-15 Sony Corporation Information processing apparatus and program

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5636041A (en) * 1995-05-24 1997-06-03 Dell Usa, L.P. Technique for increasing the visibility of an LCD panel during warm-up thereof
JPH09146073A (en) * 1995-11-21 1997-06-06 Nec Corp Back light control circuit for liquid crystal display device
JP2000250455A (en) * 1999-02-26 2000-09-14 Matsushita Electric Ind Co Ltd Information processing device
US7388569B2 (en) 2001-12-10 2008-06-17 Mitsubishi Denki Kabushiki Kaisha Reflection liquid crystal display apparatus
US7898619B2 (en) 2005-04-28 2011-03-01 Sharp Kabushiki Kaisha Liquid crystal display
US7903214B2 (en) 2005-04-28 2011-03-08 Sharp Kabushiki Kaisha Liquid crystal display device comprising an optical sensor for detecting the intensity of ambient light
US8085256B2 (en) 2005-04-28 2011-12-27 Sharp Kabushiki Kaisha Electronic device
US7863660B2 (en) 2005-05-31 2011-01-04 Sharp Kabushiki Kaisha Photodiode and display device
US8194304B2 (en) 2005-06-03 2012-06-05 Sharp Kabushiki Kaisha Display device and electric apparatus using the same
US8063866B2 (en) 2007-11-15 2011-11-22 Toshiba Matsushita Display Technology Co., Ltd. Display device capable of measuring an illuminance and widening a dynamic range of the measured illuminance
US8780033B2 (en) 2008-09-09 2014-07-15 Sony Corporation Information processing apparatus and program
US10714022B2 (en) 2008-09-09 2020-07-14 Sony Corporation Information processing apparatus and program

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