JP2003308041A - Plasma display device - Google Patents
Plasma display deviceInfo
- Publication number
- JP2003308041A JP2003308041A JP2002112377A JP2002112377A JP2003308041A JP 2003308041 A JP2003308041 A JP 2003308041A JP 2002112377 A JP2002112377 A JP 2002112377A JP 2002112377 A JP2002112377 A JP 2002112377A JP 2003308041 A JP2003308041 A JP 2003308041A
- Authority
- JP
- Japan
- Prior art keywords
- block
- display device
- plasma display
- motion
- screen
- 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.)
- Granted
Links
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、プラズマディス
プレイ装置に関する。
【０００２】
【従来の技術】プラズマディスプレイ装置では、長時間
同じ静止画像を表示しておくと、表示部分の画素が劣化
し、焼き付きが発生する。そこで、同じ静止画像が表示
されている状態が所定時間以上継続した場合に、明るさ
を自動的に低下させたり、電源を自動的にオフにしたり
する方法が既に開発されている。
【０００３】しかしながら、従来においては、画面全体
で静止画であるか動画であるかの判定を行い、一部分で
も動きがあれば動画と判定していたたため、一部分のみ
に動きがある場合にはその他の静止部分で焼き付きが発
生するという問題があった。
【０００４】
【発明が解決しようとする課題】この発明は、画面内に
動きのある部分を含んでいても、静止部分において焼き
付きが発生するのを防止できるプラズマディスプレイ装
置を提供することを目的とする。
【０００５】
【課題を解決するための手段】この発明によるプラズマ
ディスプレイ装置は、１画面内が複数のブロックに分割
されており、各ブロック毎に動き量を検出する動き量検
出手段、および各ブロック毎に検出された動き量に基づ
いて、動き量の小さいブロックに対しては映像信号の輝
度を低下させる輝度補正手段を備えていることを特徴と
する。
【０００６】
【発明の実施の形態】以下、図面を参照して、この発明
の実施の形態について説明する。
【０００７】図１は、プラズマディスプレイ装置の構成
を示している。
【０００８】入力映像信号は、Ａ／Ｄ変換回路１によっ
てデジタル映像信号に変換される。この例では、デジタ
ル映像信号は８ビットであり、”０”は黒を表し、”２
５５”は白を表すものとする。Ａ／Ｄ変換回路１によっ
て得られたデジタル映像信号は、映像調整回路２に送ら
れるとともに、動き検出回路３に送られる。
【０００９】映像調整回路２では、輝度補正等の映像調
整が行われる。映像調整回路２から出力された映像信号
は、スケール変換回路４に送られてＰＤＰパネル５の画
素数に対応した画面サイズに変換された後、ＰＤＰパネ
ル５に送られる。
【００１０】動き検出回路３では、１画面内に設定され
た複数の領域（動き検出用ブロック）毎に、映像の動き
量ＶBlock を検出して、映像調整回路２に送る。各動き
検出用ブロックは、図２に示すように、１画面が縦方向
にＮ個、横方向にＭ個に分割されることによって形成さ
れたブロックＢ11〜ＢNMである。
【００１１】映像調整回路２は、図３に示すような、動
き量と輝度制御用係数Ｋとの関係に基づいて、各ブロッ
ク毎に動き量ＶBlock に応じた輝度制御用係数Ｋを算出
し、映像信号に乗算する。輝度制御用係数Ｋは、図３に
示すように、動き量が大きい場合には標準値１をとり、
動き量が小さくなるに伴って徐々に小さくなる。したが
って、動き量ＶBlock が小さいブロックでは、映像信号
の輝度が低減せしめられる。
【００１２】このように、動き量の小さい領域では、輝
度が低減せしめられるため、画面内に動きのある部分を
含んでいても、静止部分において焼き付けが発生するの
が防止される。
【００１３】なお、上記実施の形態では、１ブロック単
位で動き量を検出しているが、１画素単位で動き量を検
出するようにしてもよい。
【００１４】
【発明の効果】この発明によれば、画面内に動きのある
部分を含んでいても、静止部分において焼き付きが発生
するのを防止できるようになる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device. 2. Description of the Related Art In a plasma display device, if the same still image is displayed for a long time, pixels in a display portion are deteriorated and burn-in occurs. Therefore, a method has been already developed in which the brightness is automatically reduced or the power is automatically turned off when the state in which the same still image is displayed continues for a predetermined time or more. Conventionally, however, it is determined whether the entire screen is a still image or a moving image, and it is determined that the moving image is a moving image if only a part of the screen is moving. However, there is a problem that burn-in occurs in the stationary part. SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device which can prevent burn-in from occurring in a stationary portion even if the screen includes a moving portion. I do. In the plasma display device according to the present invention, one screen is divided into a plurality of blocks, a motion amount detecting means for detecting a motion amount for each block, and each block. It is characterized by comprising a luminance correcting means for lowering the luminance of a video signal for a block having a small amount of motion based on the amount of motion detected for each. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a plasma display device. The input video signal is converted into a digital video signal by the A / D conversion circuit 1. In this example, the digital video signal is 8 bits, "0" represents black, and "2"
55 "represents white. The digital video signal obtained by the A / D conversion circuit 1 is sent to the video adjustment circuit 2 and also to the motion detection circuit 3. In the video adjustment circuit 2, The video signal output from the video adjustment circuit 2 is sent to the scale conversion circuit 4 and converted into a screen size corresponding to the number of pixels of the PDP panel 5, and then the PDP panel is adjusted. The motion detection circuit 3 detects a video motion amount V Block for each of a plurality of areas (motion detection blocks) set within one screen and sends the video motion amount V Block to the video adjustment circuit 2. Each of the motion detection blocks is a block B 11 to B NM formed by dividing one screen into N in the vertical direction and M in the horizontal direction, as shown in FIG. The image adjustment circuit 2 Based on the relationship between the motion amount and the luminance control coefficient K as shown in Fig. 3, a luminance control coefficient K corresponding to the motion amount V Block is calculated for each block and multiplied by the video signal. The use coefficient K takes a standard value 1 when the motion amount is large, as shown in FIG.
It gradually decreases as the amount of movement decreases. Therefore, in a block having a small amount of motion V Block , the luminance of the video signal is reduced. As described above, since the luminance is reduced in the area where the amount of motion is small, even if the screen includes a moving part, the occurrence of burn-in in a stationary part is prevented. In the above embodiment, the amount of motion is detected in units of one block. However, the amount of motion may be detected in units of one pixel. According to the present invention, it is possible to prevent burn-in from occurring in a stationary portion even if the screen includes a moving portion.
【図面の簡単な説明】
【図１】プラズマディスプレイ装置の構成を示すブロッ
ク図である。
【図２】１画面内に設定された動き検出用ブロックを示
す模式図である。
【図３】動き量とコントラストを制御するための係数Ｋ
との関係を示すグラフである。
【符号の説明】
２ 映像調整回路
３ 動き検出回路
５ ＰＤＰパネルBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a plasma display device. FIG. 2 is a schematic diagram showing a motion detection block set in one screen. FIG. 3 shows a coefficient K for controlling a motion amount and contrast.
6 is a graph showing a relationship with the graph. [Description of Signs] 2 Video adjustment circuit 3 Motion detection circuit 5 PDP panel
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０９Ｇ 3/20 ６７０ Ｇ０９Ｇ 3/28 Ｋ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) G09G 3/20 670 G09G 3/28 K
Claims (1)
おり、各ブロック毎に動き量を検出する動き量検出手
段、および各ブロック毎に検出された動き量に基づい
て、動き量の小さいブロックに対しては映像信号の輝度
を低下させる輝度補正手段、 を備えているプラズマディスプレイ装置。1. A screen is divided into a plurality of blocks, a motion amount detecting means for detecting a motion amount for each block, and a motion amount detected for each block. A brightness correction unit that reduces the brightness of a video signal for a block having a small amount of motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002112377A JP4111738B2 (en) | 2002-04-15 | 2002-04-15 | Plasma display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002112377A JP4111738B2 (en) | 2002-04-15 | 2002-04-15 | Plasma display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003308041A true JP2003308041A (en) | 2003-10-31 |
| JP4111738B2 JP4111738B2 (en) | 2008-07-02 |
Family
ID=29394897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002112377A Expired - Fee Related JP4111738B2 (en) | 2002-04-15 | 2002-04-15 | Plasma display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4111738B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005043776A (en) * | 2003-07-25 | 2005-02-17 | Sony Corp | Image processing system and its method |
| JP2006195439A (en) * | 2005-01-12 | 2006-07-27 | Samsung Sdi Co Ltd | Plasma display device, and image processing method thereof |
| WO2007063830A1 (en) * | 2005-11-29 | 2007-06-07 | Kyocera Corporation | Display device |
| JP2007148103A (en) * | 2005-11-29 | 2007-06-14 | Kyocera Corp | Display apparatus |
| JP2007148104A (en) * | 2005-11-29 | 2007-06-14 | Kyocera Corp | Display apparatus |
| KR100771614B1 (en) | 2005-07-29 | 2007-10-30 | 엘지전자 주식회사 | Display device and method for preventing an afterimage thereof |
| JP2007293039A (en) * | 2006-04-25 | 2007-11-08 | Sony Corp | Image display device and image display method |
| US7525514B2 (en) | 2004-06-25 | 2009-04-28 | Funai Electric Co., Ltd. | Plasma display apparatus |
| JP2009163236A (en) * | 2007-12-20 | 2009-07-23 | Thomson Licensing | Video picture display method to reduce effects of blurring and double contours and device implementing the same |
| US7605780B2 (en) | 2004-05-25 | 2009-10-20 | Samsung Electronics Co., Ltd. | Display apparatus and control method thereof |
| US7839362B2 (en) | 2005-01-21 | 2010-11-23 | Sony Corporation | Sticking phenomenon correction method, self-luminous apparatus, sticking phenomenon correction apparatus and program |
| JP2013250562A (en) * | 2013-07-11 | 2013-12-12 | Sony Corp | Display device, video type distinguishing device, display device driving method, and video type distinguishing method |
| US8836734B2 (en) | 2008-12-11 | 2014-09-16 | Sony Corporation | Display burn-in prevention device and method with motion analysis |
-
2002
- 2002-04-15 JP JP2002112377A patent/JP4111738B2/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005043776A (en) * | 2003-07-25 | 2005-02-17 | Sony Corp | Image processing system and its method |
| JP4552397B2 (en) * | 2003-07-25 | 2010-09-29 | ソニー株式会社 | Image processing apparatus and method |
| US7605780B2 (en) | 2004-05-25 | 2009-10-20 | Samsung Electronics Co., Ltd. | Display apparatus and control method thereof |
| US7525514B2 (en) | 2004-06-25 | 2009-04-28 | Funai Electric Co., Ltd. | Plasma display apparatus |
| JP2006195439A (en) * | 2005-01-12 | 2006-07-27 | Samsung Sdi Co Ltd | Plasma display device, and image processing method thereof |
| JP4611880B2 (en) * | 2005-01-12 | 2011-01-12 | 三星エスディアイ株式会社 | Plasma display device and image processing method for plasma display device |
| US7839362B2 (en) | 2005-01-21 | 2010-11-23 | Sony Corporation | Sticking phenomenon correction method, self-luminous apparatus, sticking phenomenon correction apparatus and program |
| KR100771614B1 (en) | 2005-07-29 | 2007-10-30 | 엘지전자 주식회사 | Display device and method for preventing an afterimage thereof |
| JP2007148104A (en) * | 2005-11-29 | 2007-06-14 | Kyocera Corp | Display apparatus |
| JP2007148103A (en) * | 2005-11-29 | 2007-06-14 | Kyocera Corp | Display apparatus |
| WO2007063830A1 (en) * | 2005-11-29 | 2007-06-07 | Kyocera Corporation | Display device |
| US9105229B2 (en) | 2005-11-29 | 2015-08-11 | Kyocera Corporation | Display apparatus having luminance reduction controller |
| JP2007293039A (en) * | 2006-04-25 | 2007-11-08 | Sony Corp | Image display device and image display method |
| JP2009163236A (en) * | 2007-12-20 | 2009-07-23 | Thomson Licensing | Video picture display method to reduce effects of blurring and double contours and device implementing the same |
| US8836734B2 (en) | 2008-12-11 | 2014-09-16 | Sony Corporation | Display burn-in prevention device and method with motion analysis |
| JP2013250562A (en) * | 2013-07-11 | 2013-12-12 | Sony Corp | Display device, video type distinguishing device, display device driving method, and video type distinguishing method |
Also Published As
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|---|---|
| JP4111738B2 (en) | 2008-07-02 |
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