JPH0575951A - Television receiver - Google Patents
Television receiverInfo
- Publication number
- JPH0575951A JPH0575951A JP3237531A JP23753191A JPH0575951A JP H0575951 A JPH0575951 A JP H0575951A JP 3237531 A JP3237531 A JP 3237531A JP 23753191 A JP23753191 A JP 23753191A JP H0575951 A JPH0575951 A JP H0575951A
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- Prior art keywords
- signal
- video signal
- section
- aspect ratio
- circuit
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は表示画面のアスペクト比
とは異なるアスペクト比の映像の表示等に適するテレビ
ジョン受像機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver suitable for displaying an image having an aspect ratio different from that of a display screen.
【０００２】[0002]
【従来の技術】従来、いわゆる高品位テレビジョン受像
機のように、ＮＴＳＣ方式やＰＡＬ方式等によるテレビ
ジョン映像と異なるアスペクト比の映像を表示すること
ができるように構成されたテレビジョン受像機が提案さ
れている。2. Description of the Related Art Conventionally, a television receiver configured to display an image having an aspect ratio different from that of a television image according to the NTSC system or the PAL system, such as a so-called high-definition television receiver. Proposed.
【０００３】このテレビジョン受像機は、図６に示すよ
うに、表示画面の縦横比（アスペクト比）が、例えば１
６：９のＣＲＴを有し、図６の（ａ）に示す如くこの表
示画面の全面を用いてアスペクト比が１６：９の映像信
号を映出する。In this television receiver, as shown in FIG. 6, the aspect ratio of the display screen is, for example, 1: 1.
A CRT of 6: 9 is provided, and a video signal having an aspect ratio of 16: 9 is displayed using the entire surface of this display screen as shown in FIG.
【０００４】また、このテレビジョン受像機においては
アスペクト比が表示画面と異なる映像信号をも表示でき
るよう構成されている。例えばアスペクト比が４：３の
映像信号を表示する場合には、図６の（ｂ）に示すよう
に、表示画面を中央の映像区間Ｌ1とその両側の余白区
間Ｌ2とに分け、映像区間Ｌ1に有効な映像信号を、余白
区間Ｌ2に無効な映像信号を映出する。そして、この無
効な映像信号としては黒レベル、白レベル等の固定輝度
の信号を用いていた。Further, this television receiver is constructed so that it can display a video signal having an aspect ratio different from that of the display screen. For example, when displaying a video signal with an aspect ratio of 4: 3, the display screen is divided into a central video section L 1 and margin sections L 2 on both sides thereof as shown in (b) of FIG. A valid video signal is displayed in the section L 1 and an invalid video signal is displayed in the blank section L 2 . A signal having a fixed brightness such as a black level or a white level is used as the invalid video signal.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、映像信
号の輝度は一定でなく不確定なため余白区間の固定輝度
に対して急峻な輝度差を生じることになる。ＣＲＴにお
いて、高輝度再現のための大電流ドライブは蛍光面の劣
化の原因であり、長時間輝度差をその状態にしておくと
その劣化度合の差が広がり、いわゆる焼き付きが生じて
しまう。However, since the brightness of the video signal is not constant and uncertain, a sharp brightness difference is generated with respect to the fixed brightness in the blank area. In a CRT, a large current drive for reproducing high brightness is a cause of deterioration of the phosphor screen, and if the brightness difference is kept in that state for a long time, the difference in the degree of deterioration widens and so-called burn-in occurs.
【０００６】そこで、本発明は映像区間と余白区間の輝
度劣化の差を極力少なくして焼き付きを防止したテレビ
ジョン受像機を提供することを課題とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a television receiver in which burn-in is prevented by minimizing the difference in luminance deterioration between the image section and the blank section.
【０００７】[0007]
【課題を解決するための手段】上記課題を達成するため
の本発明に係るテレビジョン受像機は、表示画面を映像
区間と余白区間とに分け、前記映像区間に有効な映像信
号を、前記余白区間に無効な映像信号をそれぞれ映出す
るテレビジョン受像機において、前記有効な映像信号の
信号レベルを検出し、この検出結果に基づき前記無効な
映像信号の信号レベルを可変したものである。A television receiver according to the present invention for achieving the above object divides a display screen into a video section and a blank section, and outputs a video signal effective in the video section to the blank section. In a television receiver that displays an invalid video signal in each section, the signal level of the valid video signal is detected, and the signal level of the invalid video signal is varied based on the detection result.
【０００８】[0008]
【作用】映像区間に表示される映像信号の信号レベルに
基づき余白区間の輝度が可変されるため、映像区間と余
白区間の輝度差を小さく保持できる。Since the brightness of the blank space is varied based on the signal level of the video signal displayed in the video space, the brightness difference between the video space and the blank space can be kept small.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を用いて説明す
る。図１乃至図５は本発明の一実施例を示す。Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention.
【００１０】図１にはテレビジョン受信機の回路ブロッ
クが示され、このテレビジョン受信機はアスペクト比が
１６：９の表示画面を有する。図１において、アンテナ
１で受信した受信信号はチューナ２に導かれ、チューナ
２で所望選局の映像信号が第１中間周波信号として取り
出される。この第１中間周波の映像信号はビデオ検波回
路３でベースバンドに戻されて第１ソース切換スイッチ
ＳＷ1に導かれている。FIG. 1 shows a circuit block of a television receiver, which has a display screen with an aspect ratio of 16: 9. In FIG. 1, a reception signal received by an antenna 1 is guided to a tuner 2, and the tuner 2 extracts a video signal of a desired channel selection as a first intermediate frequency signal. The video signal of the first intermediate frequency is returned to the base band by the video detection circuit 3 and guided to the first source changeover switch SW 1 .
【００１１】第１ソース切換スイッチＳＷ1はアンテナ
１からの映像信号と外部入力の映像信号（コンポジット
信号）とを選択的に切り換え、選択された映像信号はＹ
／Ｃ分離回路４で輝度信号とクロマ信号に分けられる。
輝度信号は輝度系処理回路５にてシャープネスコントロ
ール、ピクチャーコントロール等がなされ、処理後の輝
度信号がアスペクト比切換スイッチＳＷａに導かれてい
る。クロマ信号はクロマデコーダ６にて色差信号Ｂ−
Ｙ，Ｒ−Ｙに戻され、この各色差信号もアスペクト比切
換スイッチＳＷａに導かれている。The first source changeover switch SW 1 selectively switches between the video signal from the antenna 1 and the externally input video signal (composite signal), and the selected video signal is Y
The / C separation circuit 4 separates the luminance signal and the chroma signal.
The brightness signal is subjected to sharpness control, picture control, etc. in the brightness processing circuit 5, and the processed brightness signal is led to the aspect ratio changeover switch SWa. The chroma signal is sent to the chroma decoder 6 for the color difference signal B-
The color difference signals are returned to Y and RY, and the respective color difference signals are also guided to the aspect ratio changeover switch SWa.
【００１２】また、輝度系処理回路５の輝度信号とクロ
マデコーダ６の各色差信号はアスペクト比変換回路７に
も供給され、アスペクト比変換回路７は各信号の有効部
分を時間圧縮等して表示画面のアスペクト比（１６：
９）でなく当該映像信号のアスペクト比で表示画面の一
部を用いて映出されるよう信号処理する。図２に示すよ
うに、例えばアスペクト比が４：３の映像信号が入力さ
れた場合には水平ライン方向に３／４時間に圧縮する。
アスペクト比変換回路７で信号圧縮等された各信号は各
焼き付き防止回路８に導かれている。焼き付き防止回路
８の詳しい構成は下記に示し、この各焼き付き防止回路
８で処理された各信号がアスペクト比切換スイッチＳＷ
ａに導かれている。The luminance signal of the luminance processing circuit 5 and each color difference signal of the chroma decoder 6 are also supplied to the aspect ratio conversion circuit 7, which displays the effective portion of each signal by time compression or the like. Screen aspect ratio (16:
Instead of 9), signal processing is performed so that a part of the display screen is displayed with the aspect ratio of the video signal. As shown in FIG. 2, for example, when a video signal having an aspect ratio of 4: 3 is input, the video signal is compressed in the horizontal line direction for 3/4 hours.
Each signal compressed by the aspect ratio conversion circuit 7 is guided to each burn-in prevention circuit 8. The detailed structure of the burn-in prevention circuit 8 is shown below. Each signal processed by the burn-in prevention circuit 8 is an aspect ratio changeover switch SW.
It is led to a.
【００１３】アスペクト比切換スイッチＳＷａはアスペ
クト比を変換しない信号と変換した信号を選択的に切り
換え、選択された各信号Ｙ，Ｂ−Ｙ，Ｒ−Ｙは倍速変換
回路回路９に供給される。倍速変換回路９は例えばメモ
リを有し、このメモリに各入力信号を一旦取り込む。そ
して、１ライン分のデータを２回づつ読み出すと共にこ
の読み出し速度を書き込み速度の約２倍として第２ソー
ス切換スイッチＳＷ2に出力する。The aspect ratio changeover switch SWa selectively switches between a signal whose aspect ratio is not converted and a converted signal, and the selected signals Y, BY and RY are supplied to the double speed conversion circuit circuit 9. The double speed conversion circuit 9 has, for example, a memory, and each input signal is temporarily stored in this memory. Then, the data for one line is read twice, and the read speed is set to about twice the write speed and output to the second source changeover switch SW 2 .
【００１４】第２ソース切換スイッチＳＷ2はアンテナ
１からの映像信号（又は外部入力のコンポジット信号）
と外部入力の映像信号（輝度、色差信号）とを選択的に
切り換え、選択された映像信号は輝度・色差用マトリッ
クス回路１０に供給される。輝度・色差用マトリックス
回路１０は輝度・色差信号をＲ，Ｇ，Ｂの色信号に変換
し、この各色信号が各アンプ１１を介してＣＲＴにドラ
イブ信号として出力される。The second source selector switch SW 2 is a video signal from the antenna 1 (or an externally input composite signal).
And an externally input video signal (luminance, color difference signal) are selectively switched, and the selected video signal is supplied to the luminance / color difference matrix circuit 10. The luminance / color difference matrix circuit 10 converts the luminance / color difference signals into R, G, and B color signals, and the respective color signals are output as drive signals to the CRT via the respective amplifiers 11.
【００１５】図３には前記焼き付き防止回路７の回路ブ
ロック図が示されている。図３において、入力映像信号
（図４のＡに示す。）はクランプ回路２０に導かれ、ク
ランプ回路２０は図４のＢに示すクランプパルスのタイ
ミングで入力映像信号のペデスタルレベルを基準電圧Ｖ
ｒｅｆにクランプする。クランプ後の映像信号は信号選
択回路２１と積分器２２にそれぞれ導かれている。FIG. 3 is a circuit block diagram of the burn-in prevention circuit 7. 3, the input video signal (shown in A of FIG. 4) is guided to the clamp circuit 20, and the clamp circuit 20 changes the pedestal level of the input video signal to the reference voltage V at the timing of the clamp pulse shown in B of FIG.
Clamp to ref. The clamped video signal is guided to the signal selection circuit 21 and the integrator 22, respectively.
【００１６】積分器２２は映像信号の平均レベル値を出
力し、この積分出力（図４のＤに示す。）はオン・オフ
スイッチＳＷｂを介して信号選択回路２１に導かれてい
る。オン・オフスイッチＳＷｂはアスペクト比変換回路
７からのタイミングパルスによって制御され、Ｈレベル
でのみオンする。タイミングパルスは図４のＣに示すよ
うに表示画面の映像区間、詳しくは映像区間より若干狭
い範囲でＬレベルで、それ以外の区間でＨレベルの信号
であり、信号選択回路２１にはほぼ映像区間以外でのみ
積分出力の平均レベル信号が入力される。The integrator 22 outputs the average level value of the video signal, and the integrated output (shown by D in FIG. 4) is guided to the signal selection circuit 21 via the on / off switch SWb. The on / off switch SWb is controlled by the timing pulse from the aspect ratio conversion circuit 7 and turns on only at the H level. As shown in C of FIG. 4, the timing pulse is a signal of L level in a video section of the display screen, specifically, a range slightly narrower than the video section, and H level in the other sections, and the signal selection circuit 21 displays almost no video. The average level signal of the integrated output is input only outside the interval.
【００１７】信号選択回路２１は映像信号と積分出力の
内、高レベルの信号を選択して出力するもので、映像区
間では映像信号が、余白区間では積分出力の平均レベル
信号がそれぞれ高レベルであるため図４のＥに示すよう
な合成信号を出力する。ここで、映像区間と余白区間の
境で映像信号と平均レベル信号とがオーバーラップして
構成されているため、双方の信号タイミングが多少ずれ
ても信号選択回路２１の出力信号に不連続部分を発生す
ることがなく見やすい映像を映出できる。The signal selection circuit 21 selects and outputs a high level signal from the video signal and the integrated output. The video signal is high in the video section and the average level signal of the integrated output is high in the blank area. Therefore, a combined signal as shown by E in FIG. 4 is output. Here, since the video signal and the average level signal overlap each other at the boundary between the video section and the blank section, even if the signal timings of both are slightly deviated, a discontinuous portion is generated in the output signal of the signal selection circuit 21. It is possible to display images that are easy to see without any occurrence.
【００１８】この信号選択回路２１の出力信号は切換ス
イッチＳＷｃに導かれ、この切換スイッチＳＷｃは信号
選択回路２１の出力信号と基準電圧Ｖｒｅｆとを図４の
Ｆに示すコンポジットブランキングパルスに基づき選択
的に切り換える。コンポジットブランキングパルスがＨ
レベルのとき基準電圧を、Ｌレベルのとき信号選択回路
２１の出力信号をそれぞれ選択することによって切換ス
イッチＳＷｃからは図４のＧに示すようにクランプ区間
をペデスタルレベルとした映像信号が出力される。The output signal of the signal selecting circuit 21 is guided to the changeover switch SWc, which selects the output signal of the signal selecting circuit 21 and the reference voltage Vref based on the composite blanking pulse shown in F of FIG. Switch. Composite blanking pulse is H
By selecting the reference voltage at the level and the output signal of the signal selection circuit 21 at the L level, the changeover switch SWc outputs a video signal having a pedestal level in the clamp section as shown in G of FIG. ..
【００１９】図５には焼き付き防止回路８の具体的な回
路図が示されている。図５において、図３に対応する箇
所に同一符号を付してその説明を省略する。FIG. 5 shows a specific circuit diagram of the burn-in prevention circuit 8. 5, parts corresponding to those in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.
【００２０】以下、上記構成の作用について説明する。
図１において、チューナ２からの映像信号で、且つ、ア
スペクト比が１６：９の映像信号を映出する場合には、
第１及び第２ソース切換スイッチＳＷ1，ＳＷ2とアスペ
クト比切換スイッチＳＷａが図１に示す選択位置に位置
する。すると、チューナ２で選局された映像信号が第１
ソース切換スイッチＳＷ1を介してＹ／Ｃ分離回路４に
入力し、Ｙ／Ｃ分離回路４後の輝度系処理回路５とクロ
マデコーダ６をそれぞれ通った映像信号がそのままアス
ペクト比切換スイッチＳＷａを介して倍速変換回路９に
導かれる。２倍速に変換された映像信号は第２ソース切
換スイッチＳＷ2を介して輝度・色差用マトリックス回
路１０でＲ，Ｇ，Ｂの色信号に変換されて表示画面の全
面を使って映像信号が映出される。The operation of the above configuration will be described below.
In FIG. 1, when a video signal from the tuner 2 and an aspect ratio of 16: 9 is displayed,
The first and second source changeover switches SW 1 and SW 2 and the aspect ratio changeover switch SWa are located at the selected position shown in FIG. Then, the video signal selected by the tuner 2 becomes the first
The video signal input to the Y / C separation circuit 4 via the source changeover switch SW 1 and passed through the luminance system processing circuit 5 and the chroma decoder 6 after the Y / C separation circuit 4 is directly passed through the aspect ratio changeover switch SWa. To the double speed conversion circuit 9. The video signal converted to double speed is converted into R, G, B color signals by the luminance / color difference matrix circuit 10 via the second source changeover switch SW 2 , and the video signal is displayed on the entire display screen. Will be issued.
【００２１】また、チューナ２で受信したアスペクト比
が４：３の映像信号を映出する場合には、アスペクト比
切換スイッチＳＷａのみを図１に示す選択位置とは反対
の位置とする。すると、輝度系処理回路５の輝度信号と
クロマデコーダ６の色差信号はアスペクト比変換回路７
と焼き付き防止回路８を通ったものがアスペクト比切換
スイッチＳＷａにて選択される。従って、輝度信号及び
各色差信号はアスペクト比変換回路７で３／４時間圧縮
等されると共に各焼き付き回路８にて有効な映像信号が
存在しなくなった余白区間には各信号の平均レベル値が
挿入される。そして、このように変形された各信号が倍
速変換回路９、第２ソース切換スイッチＳＷ2を介して
輝度・色差用マトリックス回路１０に導かれる。各信号
の余白区間は全て平均レベル値であるため輝度・色差用
マトリックス回路１０で変換されたＲ，Ｇ，Ｂの色信号
も平均レベルを示す。そして、図６の（ｂ）に示すよう
に表示画面は有効区間Ｌ1と余白区間Ｌ2とに分けられ、
有効区間Ｌ1には映像信号が、余白区間Ｌ2には映像信号
の平均レベル信号がそれぞれ映出される。この平均レベ
ル信号は映像信号に基づいて変化し、有効区間と余白区
間とでは常にゆるい輝度差しか生じないため長時間の使
用によっても焼き付きが生じることはない。Further, when displaying a video signal having an aspect ratio of 4: 3 received by the tuner 2, only the aspect ratio changeover switch SWa is set to the position opposite to the selection position shown in FIG. Then, the luminance signal of the luminance processing circuit 5 and the color difference signal of the chroma decoder 6 are converted into the aspect ratio conversion circuit 7
Those that have passed through the burn-in prevention circuit 8 are selected by the aspect ratio changeover switch SWa. Therefore, the luminance signal and each color difference signal are compressed by the aspect ratio conversion circuit 7 for 3/4 hours, and the average level value of each signal is set in the blank section in which no effective video signal exists in each burn-in circuit 8. Is inserted. Then, each of the signals thus modified is guided to the luminance / color difference matrix circuit 10 through the double speed conversion circuit 9 and the second source changeover switch SW 2 . Since the blank areas of each signal are all average level values, the R, G, B color signals converted by the luminance / color difference matrix circuit 10 also indicate average levels. Then, as shown in FIG. 6B, the display screen is divided into an effective section L 1 and a blank section L 2 .
The video signal is displayed in the effective section L 1, and the average level signal of the video signal is displayed in the blank section L 2 . This average level signal changes based on the video signal, and since there is always a slight difference in brightness between the effective section and the blank section, burn-in does not occur even when used for a long time.
【００２２】尚、この実施例では輝度信号と各色差信号
の全てについて各余白区間に平均レベル信号を挿入した
が、輝度信号のみに平均レベル信号を挿入しても良く、
輝度信号と各色差信号の処理段階でなくＲ，Ｇ，Ｂの色
信号の処理段階で焼き付け防止処理を行っても良い。こ
の場合には３色全てについて行っても良く、任意の１色
又は２色について行っても良い。さらに、余白区間に平
均レベル信号を挿入したが、平均レベル信号でなくそれ
に近いレベル信号を挿入するよう構成しても良い。これ
は輝度差の大小と画面の見やすさとの調和の下適宜され
る。さらにまた、積分器２２の時定数はこの実施例では
１水平区間の平均値となるよう設定されているが、１垂
直区間の平均値となるよう設定しても良く、時定数は場
合に応じて適宜決定される。In this embodiment, the average level signal is inserted in each margin section for all of the luminance signal and each color difference signal, but the average level signal may be inserted only in the luminance signal,
The image sticking prevention processing may be performed at the processing stage of the R, G, B color signals instead of the processing stage of the luminance signal and each color difference signal. In this case, all three colors may be performed, or arbitrary one or two colors may be performed. Further, although the average level signal is inserted in the blank area, a level signal close to the average level signal may be inserted instead of the average level signal. This is appropriately adjusted in harmony with the magnitude of the brightness difference and the visibility of the screen. Furthermore, the time constant of the integrator 22 is set to be the average value of one horizontal section in this embodiment, but it may be set to be the average value of one vertical section. It is decided as appropriate.
【００２３】尚、この実施例ではアスペクト比が表示画
面と異なる映像信号を表示する場合について示したが、
アスペクト比が同じであるが、表示画面の一部のみを使
用して映出する場合にも適用できる。In this embodiment, the case of displaying a video signal having an aspect ratio different from that of the display screen has been described.
Although the aspect ratio is the same, it can also be applied to the case of displaying using only a part of the display screen.
【００２４】[0024]
【発明の効果】以上述べたように本発明によれば、表示
画面を映像区間と余白区間とに分け、前記映像区間に有
効な映像信号を、余白区間に無効な映像信号をそれぞれ
映出するテレビジョン受像機において、前記有効な映像
信号の信号レベルを検出し、この検出結果に基づき前記
無効な映像信号の信号レベルを可変したので、映像区間
と余白区間との境の輝度差がゆるやかとなり長時間の使
用によっても焼き付けが生じないという効果を奏する。As described above, according to the present invention, the display screen is divided into a video section and a blank section, and a valid video signal is displayed in the video section and an invalid video signal is displayed in the blank section. In the television receiver, the signal level of the valid video signal is detected, and the signal level of the invalid video signal is varied based on the detection result, so that the brightness difference between the video section and the blank section becomes gentle. Even if it uses it for a long time, it has the effect that baking does not occur.
【図１】テレビジョン受像機の回路ブロック図（実施
例）。FIG. 1 is a circuit block diagram of a television receiver (embodiment).
【図２】映像信号の時間圧縮比を示す図（実施例）。FIG. 2 is a diagram showing a time compression ratio of a video signal (example).
【図３】焼き付き防止回路の回路ブロック図（実施
例）。FIG. 3 is a circuit block diagram of a burn-in prevention circuit (embodiment).
【図４】タイムチャート図（実施例）。FIG. 4 is a time chart diagram (example).
【図５】焼き付き防止回路の回路図（実施例）。FIG. 5 is a circuit diagram of a burn-in prevention circuit (embodiment).
【図６】（ａ）は表示画面の全面を用いて表示する場
合、（ｂ）は表示画面の一部を用いて表示する場合をそ
れぞれ示す図。FIG. 6A is a diagram showing a case where display is performed using the entire surface of the display screen, and FIG. 6B is a diagram showing a case where display is performed using a part of the display screen.
Claims (1)
け、前記映像区間に有効な映像信号を、前記余白区間に
無効な映像信号をそれぞれ映出するテレビジョン受像機
において、 前記有効な映像信号の信号レベルを検出し、この検出結
果に基づき前記無効な映像信号の信号レベルを可変した
ことを特徴とするテレビジョン受像機。1. A television receiver that divides a display screen into a video section and a blank section, and projects a valid video signal in the video section and an invalid video signal in the blank section, respectively. A television receiver characterized in that the signal level of a signal is detected and the signal level of the invalid video signal is varied based on the detection result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3237531A JPH0575951A (en) | 1991-09-18 | 1991-09-18 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3237531A JPH0575951A (en) | 1991-09-18 | 1991-09-18 | Television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0575951A true JPH0575951A (en) | 1993-03-26 |
Family
ID=17016719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3237531A Pending JPH0575951A (en) | 1991-09-18 | 1991-09-18 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0575951A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001024513A1 (en) * | 1999-09-24 | 2001-04-05 | Sony Electronics Inc. | Method and apparatus to minimize burn lines on a display |
| JP2002251163A (en) * | 2000-06-26 | 2002-09-06 | Canon Inc | Picture display device, and driving method for picture display device |
| EP1460840A1 (en) * | 2003-03-17 | 2004-09-22 | Deutsche Thomson-Brandt Gmbh | Device and method for reducing burning effects on display means |
| CN100372360C (en) * | 2003-12-30 | 2008-02-27 | Lg电子株式会社 | Apparatus for preventing image sticking of video display appliance and method thereof |
| WO2008139541A1 (en) * | 2007-04-27 | 2008-11-20 | Pioneer Corporation | Image display device and method for generating mask used for the image display device |
-
1991
- 1991-09-18 JP JP3237531A patent/JPH0575951A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001024513A1 (en) * | 1999-09-24 | 2001-04-05 | Sony Electronics Inc. | Method and apparatus to minimize burn lines on a display |
| US6369851B1 (en) | 1999-09-24 | 2002-04-09 | Sony Corporation | Method and apparatus to minimize burn lines on a display |
| JP2002251163A (en) * | 2000-06-26 | 2002-09-06 | Canon Inc | Picture display device, and driving method for picture display device |
| EP1460840A1 (en) * | 2003-03-17 | 2004-09-22 | Deutsche Thomson-Brandt Gmbh | Device and method for reducing burning effects on display means |
| CN100372360C (en) * | 2003-12-30 | 2008-02-27 | Lg电子株式会社 | Apparatus for preventing image sticking of video display appliance and method thereof |
| WO2008139541A1 (en) * | 2007-04-27 | 2008-11-20 | Pioneer Corporation | Image display device and method for generating mask used for the image display device |
| JPWO2008139541A1 (en) * | 2007-04-27 | 2010-07-29 | パイオニア株式会社 | Image display apparatus and mask generation method used for the image display apparatus |
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