JP4996065B2 - 有機el表示装置の製造方法および有機el表示装置 - Google Patents
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
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- Theoretical Computer Science (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Description
ここで、電流検出器32による検出電流に基づく補正データの検出について説明する。すなわち、本実施形態においては、表示エリアを分割して得たエリア(検出エリア)のOLED素子を点灯した場合の駆動電流量を検出し、その駆動電流量が他のエリア(検出エリア)とは異なるエリア(補正が必要な検出エリア)を検出する。
表示エリアを直接分割して得た大エリアの大きさを水平方向8画素、垂直方向8ラインとして、ある一定の信号レベル(画素データ)で各エリアを図5に示すように順次点灯し電流の測定を行う。まず、表示エリアのうち左上隅のエリア、すなわち左上隅の画素の座標が(1,1)、右下隅の画素の座標が(8,8)の矩形のエリアを点灯し、その時の電流を測定する(図5(a))。
a)図10のようにムラを含むと判定された8x8画素のエリアを中心として、16x16画素のエリアを考える。このエリアの外周上の、図に示す8画素を同時に、2つ以上の入力電圧(この例では図11の3点Va1,Va2,Va3)で点灯し、各入力電圧に於けるCV電流を測定する。各画素の平均電流(icv)はこのCV電流を8で割った値となるので、入力電圧対icvの関係をプロットする。この結果により、このエリア周辺の平均的なTFTのV−I特性を予想し、プロットする(図12の(a))。
図8は、他のフィルター係数を実現する例である。この場合、図8(a)において加算により得た各画素の加算値から、図8(b)において加算により得た各画素の加算値を減算することにより、(c)のフィルター係数が得られる。
Claims (6)
- 有機EL素子を含む表示画素をマトリクス状に配列して形成した有機EL表示装置の製造方法であって、
表示エリアを所定の複数の検出エリアに分割し、この検出エリアにおける複数の表示画素の有機EL素子を選択的に発光させて、検出エリア毎の駆動電流を検出し、
検出した検出エリア毎の駆動電流に基づいて、他の検出エリアと輝度の異なる補正が必要な検出エリアを検出し、
この補正が必要な検出エリアに対して、入力されてくる画素毎の画像データを補正するための補正データを算出し、
補正の必要な画素の位置とその画素の補正データを不揮発性メモリに記憶させることを特徴とする有機EL表示装置の製造方法であり、
前記補正が必要な検出エリアの検出は、前記表示エリアを分割した検出エリア毎の検出電流に対し、検出対象となる検出エリアを含む所定の複数の検出エリアの検出電流について2次元空間フィルタをかけた結果を用いて、検出エリア毎に補正の必要な検出エリアを検出し、
前記2次元空間フィルタの演算は、検出エリア毎に駆動電流を検出する際に、順次位置をずらしながら、同時に複数の検出エリアを点灯してゆき、その結果を用いて行い、
前記2次元空間フィルタは、対象検出エリアについての重みが大きく、対象検出エリアに近い周辺検出エリアの値を加算し、対象検出エリアから離れた周辺検出エリアの値を減算する
ことを特徴とする有機EL表示装置の製造方法。 - 請求項1に記載の方法であって、
補正の必要な検出エリアについて、複数のさらに小さな検出エリアに分割し、この小さな検出エリアについて、補正が必要なものを検出するという処理を1回または順次小さな検出エリアに対し2回以上行い、補正データの算出対象となる検出エリアを得ることを特徴とする有機EL表示装置の製造方法。 - 請求項2に記載の方法であって、
前記補正データの算出の対象となる検出エリアは1表示画素、または表示における1ドットであることを特徴とする有機EL表示装置の製造方法。 - 有機EL素子を含む表示画素をマトリクス状に配列して形成した有機EL表示装置であって、
表示エリアを所定の複数の検出エリアに分割し、この検出エリアにおける複数の表示画素の有機EL素子を選択的に発光させて、検出エリア毎の駆動電流を検出する手段と、
検出した検出エリア毎の駆動電流に基づいて、他の検出エリアと輝度の異なる補正が必要な検出エリアを検出する手段と、
この補正が必要な検出エリアに対して、入力されてくる画素毎の画像データを補正するための補正データを算出する手段と、
補正の必要な画素の位置とその画素の補正データを記憶する不揮発性メモリと、
を有することを特徴とする有機EL表示装置であり、
前記表示エリアを分割した検出エリア毎の検出電流に対し、検出対象となる検出エリアを含む所定の複数の検出エリアの検出電流について2次元空間フィルタをかけた結果を用いて、検出エリア毎に補正の必要な検出エリアを検出し、
検出エリア毎に駆動電流を検出する際に、順次位置をずらしながら、同時に複数の検出エリアを点灯してゆき、その結果を用いて前記2次元空間フィルタの演算を行い、
前記2次元空間フィルタは、対象検出エリアについての重みが大きく、対象検出エリアに近い周辺検出エリアの値を加算し、対象検出エリアから離れた周辺検出エリアの値を減算することを特徴とする有機EL表示装置。 - 請求項4に記載の装置であって、
補正の必要な検出エリアについて、複数のさらに小さな検出エリアに分割し、この小さな検出エリアについて、補正が必要なものを検出するという処理を1回または順次小さな検出エリアに対し2回以上行い、補正データの算出対象となる検出エリアを得ること特徴とする有機EL表示装置。 - 請求項5に記載の装置であって、
前記補正データの算出の対象となる検出エリアは1表示画素、または表示における1ドットであることを特徴とする有機EL表示装置。
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US11/422,752 US7859492B2 (en) | 2005-06-15 | 2006-06-07 | Assuring uniformity in the output of an OLED |
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