JPH05292536A - Automatic picture quality adjusting device - Google Patents
Automatic picture quality adjusting deviceInfo
- Publication number
- JPH05292536A JPH05292536A JP4091238A JP9123892A JPH05292536A JP H05292536 A JPH05292536 A JP H05292536A JP 4091238 A JP4091238 A JP 4091238A JP 9123892 A JP9123892 A JP 9123892A JP H05292536 A JPH05292536 A JP H05292536A
- Authority
- JP
- Japan
- Prior art keywords
- color temperature
- color
- green
- red
- video signal
- 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
Landscapes
- Controls And Circuits For Display Device (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はカラーテレビジョン受像
機、カラービデオモニタ、カラーリアプロジェクタ等に
使用して好適な自動画質調整装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic image quality adjusting device suitable for use in a color television receiver, a color video monitor, a color rear projector and the like.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】一般に
カラーテレビジョン受像機、カラービデオモニタ等の映
像画面に映し出された同じ色温度の白色も、視聴してい
る場所の照明（自然光も含めて）の色温度により、その
印象が違ったものとなる。2. Description of the Related Art In general, white light having the same color temperature displayed on an image screen of a color television receiver, a color video monitor, or the like also illuminates a place where the user is watching (including natural light). ), The impression will be different depending on the color temperature.
【０００３】然しながら、従来のカラーテレビジョン受
像機等においては、色温度が固定であるかあるいは色温
度の調整機能があっても、ユーザの手動により調整する
ものであった。このため視聴している場所の照明によっ
てはユーザは不自然な白色や色合いのカラー映像画面を
見せられていた不都合があった。However, in a conventional color television receiver or the like, even if the color temperature is fixed or has a color temperature adjusting function, the color temperature is manually adjusted by the user. For this reason, there is an inconvenience that the user is presented with an unnatural white or shaded color image screen depending on the illumination of the place being viewed.
【０００４】本発明は斯る点に鑑みユーザの手を煩わす
ことなく、ユーザがどの様な照明下でも自然な白色や色
合いでカラー映像画面を見ることができるようにするこ
とを目的とする。In view of the above problems, an object of the present invention is to allow a user to view a color image screen in a natural white color or shade under any lighting without bothering the user.
【０００５】[0005]
【課題を解決するための手段】本発明自動画質調整装置
は例えば図１に示す如く、外光の色温度を検出する色温
度検出手段１Ｒ，１Ｇ，１Ｂと、赤、緑及び青色の映像
信号を出力する映像信号処理回路２と、この色温度検出
手段１Ｒ，１Ｇ，１Ｂにより検出された色温度情報に基
づいて、この映像信号処理回路２から出力される赤、緑
及び青色の映像信号の各信号レベルを調整する色温度設
定回路３とを備えたものである。As shown in FIG. 1, for example, the automatic image quality adjusting apparatus of the present invention includes color temperature detecting means 1R, 1G and 1B for detecting the color temperature of external light and red, green and blue image signals. Of the red, green and blue video signals output from the video signal processing circuit 2 based on the color temperature information detected by the color temperature detecting means 1R, 1G and 1B. The color temperature setting circuit 3 for adjusting each signal level is provided.
【０００６】また本発明自動画質調整装置は例えば図１
に示す如く、上述において色温度検出手段１Ｒ，１Ｇ，
１Ｂにより検出された色温度情報に基づいて周囲の明る
さに応じた画面の明るさの制御を行う映像コントラスト
調整回路２ａをこの映像信号処理回路２内に設けたもの
である。The automatic image quality adjusting apparatus of the present invention is shown in FIG.
As described above, the color temperature detecting means 1R, 1G,
The image signal processing circuit 2 is provided with an image contrast adjusting circuit 2a for controlling the screen brightness according to the ambient brightness based on the color temperature information detected by 1B.
【０００７】[0007]
【作用】本発明によれば外光の色温度を検出し、この色
温度情報に基づいて、赤、緑及び青色の映像信号の各信
号レベルを調整するようにしているので、ユーザの手を
煩わすことなく、どの様な照明下でも自然な白色や色合
いでカラー映像画面を見ることができる。According to the present invention, the color temperature of external light is detected, and the signal levels of the red, green, and blue video signals are adjusted based on this color temperature information. You can view a color video screen with natural white and shades under any lighting without any trouble.
【０００８】また、本発明によれば色温度検出手段１
Ｒ，１Ｇ，１Ｂで周囲の明るさを測定できるので、周囲
の明るさに応じて画面の明るさを調整する機能と上述と
を組み合わせて、より見やすい自然な色合いのカラー映
像画面を実現することができる。Further, according to the present invention, the color temperature detecting means 1
Since the ambient brightness can be measured with R, 1G, and 1B, the function of adjusting the screen brightness according to the ambient brightness can be combined with the above to realize a color image screen with a natural hue that is easier to see. You can
【０００９】[0009]
【実施例】以下図面を参照しながら本発明自動画質調整
装置の一実施例につき説明する。図１において、２は映
像信号処理回路を示し、この映像信号処理回路２はテレ
ビジョン放送信号の受信信号やビデオテープレコーダよ
りの再生信号等のカラー映像信号が供給され、このカラ
ー映像信号をデコードし、この出力側に赤色映像信号
Ｒ、緑色映像信号Ｇ及び青色映像信号Ｂの三原色信号を
得るようにしたものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the automatic image quality adjusting device of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 2 denotes a video signal processing circuit. The video signal processing circuit 2 is supplied with a color video signal such as a reception signal of a television broadcast signal or a reproduction signal from a video tape recorder, and decodes this color video signal. Then, the three primary color signals of the red video signal R, the green video signal G and the blue video signal B are obtained on this output side.
【００１０】本例においてはこの映像信号処理回路２内
に後述するコントラスト制御信号により周囲の明るさに
応じて画面の明るさをコントロールする映像コントラス
ト調整回路２ａを設ける如くする。In this example, a video contrast adjusting circuit 2a for controlling the screen brightness according to the ambient brightness by a contrast control signal described later is provided in the video signal processing circuit 2.
【００１１】この映像信号処理回路２の出力側に得られ
る赤色映像信号Ｒ、緑色映像信号Ｇ及び青色映像信号Ｂ
を夫々色温度設定回路３を構成し、後述する色温度制御
信号により利得が制御される利得制御増幅器３Ｒ，３Ｇ
及び３Ｂを介して夫々カラー陰極線管４に供給し、この
カラー陰極線管４によりカラー映像画面を得る如くす
る。A red video signal R, a green video signal G and a blue video signal B obtained at the output side of the video signal processing circuit 2.
The gain control amplifiers 3R and 3G each have a color temperature setting circuit 3 whose gain is controlled by a color temperature control signal described later.
And 3B to supply them to the color cathode ray tube 4, respectively, so that a color image screen is obtained by this color cathode ray tube 4.
【００１２】また、図１において１Ｒ，１Ｇ及び１Ｂは
夫々赤色フィルタ５Ｒ、緑色フィルタ５Ｇ及び青色フィ
ルタ５Ｂを介して外光（例えばテレビジョン受像機の周
囲の光）が供給される赤、緑及び青色の光センサを示
し、之等赤、緑及び青色の光センサ１Ｒ，１Ｇ及び１Ｂ
に夫々得られる外光の強さに応じた赤、緑及び青検出信
号を夫々インターフェイス回路６に供給する如くする。Further, in FIG. 1, reference numerals 1R, 1G and 1B denote red, green and external light (for example, light around the television receiver) to which external light is supplied via a red filter 5R, a green filter 5G and a blue filter 5B, respectively. Shown is a blue light sensor, which is a red, green and blue light sensor 1R, 1G and 1B.
The red, green and blue detection signals corresponding to the respective external light intensities are supplied to the interface circuit 6, respectively.
【００１３】このインターフェイス回路６においては、
この外光の赤、緑及び青色検出信号の大きさの割合によ
り外光の色温度を検出し、この外光の色温度に見合った
赤、緑及び青色映像信号Ｒ、Ｇ及びＢが得られるような
色温度制御信号を色温度設定回路３に供給し、この色温
度設定回路３を構成する利得制御増幅器３Ｒ、３Ｇ及び
３Ｂの利得を制御し、カラー陰極線管４に供給される
赤、緑及び青色映像信号Ｒ、Ｇ及びＢのレベルを制御す
る如くする。In this interface circuit 6,
The color temperature of the external light is detected by the ratio of the magnitudes of the red, green and blue detection signals of the external light, and the red, green and blue video signals R, G and B corresponding to the color temperature of the external light are obtained. Such a color temperature control signal is supplied to the color temperature setting circuit 3, the gains of the gain control amplifiers 3R, 3G and 3B constituting the color temperature setting circuit 3 are controlled, and red and green supplied to the color cathode ray tube 4 are supplied. And the levels of the blue video signals R, G and B are controlled.
【００１４】また、このインターフェイス回路６におい
て、この赤、緑及び青色検出信号の大きさを合計又は平
均して、この外光の明るさを検出し、この外光（周囲の
明るさ）に応じたコントラスト制御信号を得、このコン
トラスト制御信号を映像信号処理回路２の映像コントラ
スト調整回路２ａに供給し、周囲の明るさに応じて画面
の明るさをコントロールする如くする。In the interface circuit 6, the red, green and blue detection signals are summed or averaged to detect the brightness of the external light, and the brightness of the external light (ambient brightness) is detected. Then, the contrast control signal is obtained, and this contrast control signal is supplied to the image contrast adjusting circuit 2a of the image signal processing circuit 2 so that the brightness of the screen is controlled according to the ambient brightness.
【００１５】このインターフェイス回路６はハードウエ
アで構成することができるが、マイクロコンピュータに
よるソフトウエア処理により構成することもできる。The interface circuit 6 can be configured by hardware, but can also be configured by software processing by a microcomputer.
【００１６】本例は上述の如く、例えばテレビジョン受
像機の周囲の明るさ（外光）を検出し、この外光の色温
度に基づいて、赤、緑及び青色の映像信号の各信号レベ
ルを調整するので、ユーザの手を煩わすことなく、どの
様な照明下でも自然な白色や色合いでカラー映像画面を
見ることができる利益がある。As described above, this embodiment detects the ambient brightness (external light) of a television receiver, for example, and based on the color temperature of this external light, the signal levels of the red, green and blue video signals. Therefore, there is an advantage that a color image screen can be viewed in a natural white or a hue under any lighting without any trouble of the user.
【００１７】また本例によれば、外光の色温度を検出す
る光センサ１Ｒ，１Ｇ，１Ｂで例えばテレビジョン受像
機の周囲の明るさを測定できるので、これにより周囲の
明るさに応じて映像画面の明るさを調整することがで
き、この映像コントラスト調整機能と上述の外光の色温
度により自然な白色や色合いでカラー映像画面を得る機
能とを組み合わせることにより、より見やすい自然な色
合いのカラー映像画面を実現することができる利益があ
る。Further, according to this embodiment, the ambient light of the television receiver can be measured by the optical sensors 1R, 1G, 1B for detecting the color temperature of the external light. The brightness of the image screen can be adjusted, and by combining this image contrast adjustment function and the function to obtain a color image screen with a natural white or shade depending on the color temperature of the above-mentioned external light, it is possible to obtain a natural hue that is easier to see. There is a benefit that can realize a color video screen.
【００１８】尚、図１例の色温度設定回路３において
は、利得制御増幅器３Ｒ，３Ｇ及び３Ｂを夫々利得を制
御する如く述べたが、この３つの利得制御増幅器の１つ
の利得を固定とし、他の２つを制御するようにしても上
述同様の作用効果が得られる、例えば図２に示す如く緑
色映像信号を増幅する利得制御増幅器３Ｇの利得を固定
し、他の赤色映像信号及び青色映像信号を増幅する利得
制御増幅器３Ｒ及び３Ｂの利得を調整するようにしても
よい。In the color temperature setting circuit 3 of the example of FIG. 1, the gain control amplifiers 3R, 3G and 3B are described as controlling the gains respectively, but one gain of these three gain control amplifiers is fixed, Even if the other two are controlled, the same effect as described above can be obtained. For example, as shown in FIG. 2, the gain of the gain control amplifier 3G that amplifies the green video signal is fixed, and other red video signals and blue video signals are obtained. The gains of the gain control amplifiers 3R and 3B for amplifying the signals may be adjusted.
【００１９】また、上述実施例においては、カラー陰極
線管を使用した例につき述べたが、本発明をカラー陰極
線管を用いたリアプロジェクタ、カラー液晶表示装置を
用いたリアプロジェクタ等にも適用できることは勿論で
ある。また、本発明は上述実施例に限ることなく本発明
の要旨を逸脱することなくその他種々の構成が採り得る
ことは勿論である。Further, in the above-mentioned embodiment, an example using a color cathode ray tube was described, but the present invention can be applied to a rear projector using a color cathode ray tube, a rear projector using a color liquid crystal display device, and the like. Of course. Further, the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.
【００２０】[0020]
【発明の効果】本発明によればユーザの手を煩わすこと
なく、ユーザがどの様な照明下でも自然な白色や色合い
で、カラー映像画面を見ることができる利益がある。According to the present invention, there is an advantage that the user can view a color image screen with a natural white color or shade under any lighting without bothering the user.
【図１】本発明自動画質調整装置の一実施例を示す構成
図である。FIG. 1 is a block diagram showing an embodiment of an automatic image quality adjustment device of the present invention.
【図２】色温度設定回路の他の例を示す構成図である。FIG. 2 is a configuration diagram showing another example of a color temperature setting circuit.
１Ｒ，１Ｇ，１Ｂ 光センサ ２ 映像信号処理回路 ３ 色温度設定回路 ４ カラー陰極線管 ５Ｒ，５Ｇ，５Ｂ 色フィルタ ６ インターフェイス回路 1R, 1G, 1B optical sensor 2 video signal processing circuit 3 color temperature setting circuit 4 color cathode ray tube 5R, 5G, 5B color filter 6 interface circuit
Claims (2)
と、 赤、緑及び青色の映像信号を出力する映像信号処理回路
と、 上記色温度検出手段により検出された色温度情報に基づ
いて上記映像信号処理回路から出力される赤、緑及び青
色の映像信号の各信号レベルを調整する色温度設定回路
とを備えたことを特徴とする自動画質調整装置。1. A color temperature detecting means for detecting a color temperature of external light, a video signal processing circuit for outputting red, green and blue video signals, and based on color temperature information detected by the color temperature detecting means. And a color temperature setting circuit for adjusting each signal level of the red, green and blue video signals output from the video signal processing circuit.
温度情報に基づいて周囲の明るさに応じた画面の明るさ
の制御を行う映像コントラスト調整回路を上記映像信号
処理回路内に設けたことを特徴とする請求項１記載の自
動画質調整装置。2. A video contrast adjusting circuit for controlling the brightness of the screen according to the ambient brightness based on the color temperature information detected by the color temperature detecting means is provided in the video signal processing circuit. The automatic image quality adjusting device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4091238A JPH05292536A (en) | 1992-04-10 | 1992-04-10 | Automatic picture quality adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4091238A JPH05292536A (en) | 1992-04-10 | 1992-04-10 | Automatic picture quality adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05292536A true JPH05292536A (en) | 1993-11-05 |
Family
ID=14020846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4091238A Pending JPH05292536A (en) | 1992-04-10 | 1992-04-10 | Automatic picture quality adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05292536A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002351445A (en) * | 2001-05-30 | 2002-12-06 | Matsushita Electric Ind Co Ltd | Display device |
| KR100510819B1 (en) * | 2002-10-22 | 2005-08-30 | 한국전자통신연구원 | Apparatus for improving lightness characteristic and image quality using color appearance model in digital camcoder |
| JP2005266606A (en) * | 2004-03-19 | 2005-09-29 | Fuji Xerox Co Ltd | Image display device and image display method |
| US7142218B2 (en) | 2000-05-15 | 2006-11-28 | Sharp Kabushiki Kaisha | Image display device and electronic apparatus using same, and image display method of same |
| JP2007159071A (en) * | 2005-12-09 | 2007-06-21 | Casio Comput Co Ltd | Projector, video output method, and video output program |
| JP2009010629A (en) * | 2007-06-27 | 2009-01-15 | Toshiba Corp | Information processor and television reception device control method by information processor |
| JP2010124197A (en) * | 2008-11-19 | 2010-06-03 | Hitachi Ltd | Television device |
-
1992
- 1992-04-10 JP JP4091238A patent/JPH05292536A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7142218B2 (en) | 2000-05-15 | 2006-11-28 | Sharp Kabushiki Kaisha | Image display device and electronic apparatus using same, and image display method of same |
| JP2002351445A (en) * | 2001-05-30 | 2002-12-06 | Matsushita Electric Ind Co Ltd | Display device |
| KR100510819B1 (en) * | 2002-10-22 | 2005-08-30 | 한국전자통신연구원 | Apparatus for improving lightness characteristic and image quality using color appearance model in digital camcoder |
| JP2005266606A (en) * | 2004-03-19 | 2005-09-29 | Fuji Xerox Co Ltd | Image display device and image display method |
| JP2007159071A (en) * | 2005-12-09 | 2007-06-21 | Casio Comput Co Ltd | Projector, video output method, and video output program |
| JP2009010629A (en) * | 2007-06-27 | 2009-01-15 | Toshiba Corp | Information processor and television reception device control method by information processor |
| US8443414B2 (en) | 2007-06-27 | 2013-05-14 | Kabushiki Kaisha Toshiba | Information processing apparatus and method for controlling a TV receiver |
| JP2010124197A (en) * | 2008-11-19 | 2010-06-03 | Hitachi Ltd | Television device |
| US8390640B2 (en) | 2008-11-19 | 2013-03-05 | Hitachi Consumer Electronics Co., Ltd. | Television device for adjusting quality of video image to be displayed |
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