JP2004302320A - Electrooptical device, electrooptical device control program, and scanning line selection order determining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrooptical device, an electrooptical device control program, and a scanning line selection order determining method which are suitably applied to display an image by using selection processing for scanning lines by a non-sequential scanning system. <P>SOLUTION: The electrooptical device 11 is constituted including a panel 11a, a scanning line drive part 11b, a data line drive part 11c, a control part 11d, a memory 11e, and an image data acquisition part 11f; and the control part 11d acquires the size of the panel 11a to determine selection order of scanning lines in non-sequential scanning according to a special procedure, selecting scanning lines in an image display area of the panel 11a through the non-sequential scanning in the order, and controls the scanning line drive part 11b according to pixel data to drive pixel circuits corresponding to the selected scanning lines. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００１２】
前記走査線の総数Ｘに前記階調データのビット数Ｂを乗算した乗算結果を、Ｍ_１，Ｍ_２，・・・，Ｍ_Ｂからなる前記ビット数Ｂ個の数値群に分割することで、
前記乗算結果を前記ビット数Ｂ個の２^ｎ値（ｎ＝０，１，２，・・・，（Ｂ−１））から成る比率に応じた数値に分割した数値群を生成し、
更に、前記走査線のそれぞれには、予めその並び順に合わせて通し番号が対応付けられており、
前記走査線の通し番号のうち所定番号を、前記階調データを構成するビット列の最下位ビット（０桁目）に対応する初期値として決定し、
前記乗算結果から前記分割した数値群のうち最も小さい数値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、前記階調データを構成するビット列の前記最下位ビットの次のビット（１桁目）に対応する初期値として決定し、
前記階調データのその他のビットについては、当該その他のビットの小さい桁のビットから順に、前記分割した数値群の数値のうち当該ビットのビット桁数に該当する値番目に小さい数値を選択し、前記乗算結果から前記分割した数値群のうち一番小さい数値から前記選択された数値までの合計値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、当該ビットに対応付ける初期値として決定し、
まず、前記最下位ビットに対応する初期値が示す通し番号の走査線を選択し、次に、当該最下位ビットから最上位ビットに向けて順番にシフトした各ビットに対応する前記初期値が示す通し番号の走査線をそれぞれ順番に選択するように選択順番を決定する第１の処理と、
前記階調データの各ビットに対応付けられた値にそれぞれ１を加算すると共に、前記加算後の前記階調データの各ビットに対応する値が前記走査線の総数から１を減算した値を超えたときに、その値を前記通し番号の最小値に更新する第２の処理と、前記第２の処理後の前記階調データの各ビットに対応付けられた値に対応した走査線を前記第１の処理と同様の順番で選択するように選択順番を決定する第３の処理と、を行う処理部を含み、
前記階調データを構成するビット列の各ビット毎に前記走査線の総本数から１減算した値分前記第２の処理と前記第３の処理とを繰り返し行うことで前記走査線の選択順番を決定し、当該決定された選択順番に基づき前記走査線駆動回路に前記走査線を選択させるようになっていることを特徴としている。
【００１３】
このような構成であれば、第１の発明は、走査線駆動回路によって、複数の走査線を、順次１つずつ選択することが可能であり、データ線駆動回路によって、光学素子の発光に係る制御信号を前記複数のデータ線のうち少なくとも１つのデータ線に出力することが可能であり、制御部によって、上記手順により非順次走査における走査線の選択順番を決定し、当該決定された選択順番に基づき前記走査線駆動回路の動作を制御することが可能である。
【００１４】
つまり、上記した手順によって走査線の選択順番を決定することで、階調データの各ビットに対応した走査線を選択することができ、非順次走査方式を実現することが可能となる。従って、高精細な画像表示などにおける表示ムラを抑えることが可能となる。
ここで、上記したように数値群を生成するときに、走査線の総数×階調データのビット数Ｂを正確な比率で分割（比率に応じた整数で分割）できないようなときは、前記各比率に応じた数値の近傍値に分割することで対応する。例えば、走査線の総数が５９本で、階調データのビット数が４ビットであったときは、１：２：４：８の比率で分割することになるが、この場合は正確に分割できない部分があるため、１５、３１、６３、１２７（１：２．１：４．２：８．５）といったように、正確な比率の数値に分割できない部分はその近傍値とする。
【００１５】
また、「通し番号を次の番号に更新し」という表現があるが、これは、例えば、走査線に対して、０，１，２，３，・・・，（Ｘ−１）と「１」を単位とする通し番号が対応付けられているときは、通し番号に１を加算又は減算した結果が次の番号になり、０，２，４，６，・・，（２×（Ｘ−１））と「２」を単位に通し番号が対応付けられているときは、通し番号に２を加算又は減算した結果が次の番号となる。すなわち、現在の通し番号をその通し番号の１単位分増加又は減少させたものが更新結果となる。
【００１６】
また、上記した光学素子は、例えば、液晶、エレクトロルミネッセンス素子、プラズマディスプレイ、発光ダイオード等である。
また、第２の発明は、第１の発明において、前記ビット数Ｂが４のとき、前記Ｍ_ｉ（ｉ＝１〜４）を、それぞれＭ_１＝（１／１５）Ｘ±（１／６０）Ｘ、Ｍ_２＝（２／１５）Ｘ±（１／４０）Ｘ、Ｍ_３＝（４／１５）Ｘ±（１／３０）Ｘ及びＭ_４＝（８／１５）Ｘ±（１／２０）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００１７】
つまり、第１の発明に示す式（１）におけるＭ_ｉ（ｉ＝１〜４）を、それぞれＭ_１＝（１／１５）Ｘ±（１／６０）Ｘ、Ｍ_２＝（２／１５）Ｘ±（１／４０）Ｘ、Ｍ_３＝（４／１５）Ｘ±（１／３０）Ｘ及びＭ_４＝（８／１５）Ｘ±（１／２０）Ｘより決定することで、前記数値群を生成する。この数値群に基づき決定された走査線の選択順番によって非順次走査を行うことで、走査線の総数がＸで、且つ、階調データのビット数４の電気光学装置において、画像表示における表示ムラを抑えることが可能となる。
【００１８】
また、第３の発明は、第１又は第２の発明において、前記ビット数Ｂが６のとき、前記Ｍ_ｉ（ｉ＝１〜６）を、それぞれＭ_１＝（１／６０）Ｘ±（１／２４０）Ｘ、Ｍ_２＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_３＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_４＝（６１／４８０）Ｘ±（１／８０）Ｘ、Ｍ_５＝（６１／２４０）Ｘ±（１／８０）Ｘ及びＭ_６＝（６１／１２０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００１９】
つまり、第１の発明に示す式（１）におけるＭ_ｉ（ｉ＝１〜６）を、それぞれＭ_１＝（１／６０）Ｘ±（１／２４０）Ｘ、Ｍ_２＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_３＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_４＝（６１／４８０）Ｘ±（１／８０）Ｘ、Ｍ_５＝（６１／２４０）Ｘ±（１／８０）Ｘ及びＭ_６＝（６１／１２０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成する。この数値群に基づき決定された走査線の選択順番によって非順次走査を行うことで、走査線の総数がＸで、且つ、階調データのビット数６の電気光学装置において、画像表示における表示ムラを抑えることが可能となる。
【００２０】
また、第４の発明は、第１乃至第３のいずれか１の発明において、前記ビット数Ｂが８のとき、前記Ｍ_ｉ（ｉ＝１〜８）を、それぞれＭ_１＝（１／２４０）Ｘ±（１／４８０）Ｘ、Ｍ_２＝（７／９６０）Ｘ±（１／３２０）Ｘ、Ｍ_３＝（７／４８０）Ｘ±（１／２４０）Ｘ、Ｍ_４＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_５＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_６＝（１／８）Ｘ±（１／９６）Ｘ、Ｍ_７＝（１／４）Ｘ±（７／４８０）Ｘ及びＭ_８＝（２４１／４８０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００２１】
つまり、第１の発明に示す式（１）におけるＭ_ｉ（ｉ＝１〜８）を、それぞれＭ_１＝（１／２４０）Ｘ±（１／４８０）Ｘ、Ｍ_２＝（７／９６０）Ｘ±（１／３２０）Ｘ、Ｍ_３＝（７／４８０）Ｘ±（１／２４０）Ｘ、Ｍ_４＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_５＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_６＝（１／８）Ｘ±（１／９６）Ｘ、Ｍ_７＝（１／４）Ｘ±（７／４８０）Ｘ及びＭ_８＝（２４１／４８０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成する。この数値群に基づき決定された走査線の選択順番によって非順次走査を行うことで、走査線の総数がＸで、且つ、階調データのビット数８の電気光学装置において、画像表示における表示ムラを抑えることが可能となる。
【００２２】
また、第５の発明は、光学素子を含む画素がマトリクス状に配列された画素マトリクスと、
前記画素マトリクスの行方向及び列方向のうち一方に沿って配列された画素群にそれぞれ接続する複数の走査線と、
前記画素マトリクスの行方向及び列方向のうち他方に沿って配列された画素群にそれぞれ接続する複数のデータ線と、
前記複数の走査線を、順次１つずつ選択する走査線駆動回路と、
前記光学素子の発光に係る制御信号を前記複数のデータ線のうち少なくとも１つのデータ線に出力するデータ線駆動回路と、
前記走査線駆動回路及び前記データ線駆動回路の動作を制御する制御部と、を備え、前記画素マトリクスと前記複数の走査線と前記複数のデータ線とによって形成される表示領域に所定画像を表示する電気光学装置において、前記走査線の選択順番を決定するためのプログラムであって、
前記走査線の総数Ｘ（Ｘは整数）及び前記光学素子の発光階調を示す階調データのビット数Ｂ（Ｂは整数）を取得すると、
以下の式の関係となるように当該式における適切なＭ_ｉを決定し、
【００２３】
【数５】

【００２４】
前記走査線の総数Ｘに前記階調データのビット数Ｂを乗算した乗算結果を、Ｍ_１，Ｍ_２，・・・，Ｍ_Ｂからなる前記ビット数Ｂ個の数値群に分割することで、
前記乗算結果を前記ビット数Ｂ個の２^ｎ値（ｎ＝０，１，２，・・・，（Ｂ−１））から成る比率に応じた数値に分割した数値群を生成し、
更に、前記走査線のそれぞれには、予めその並び順に合わせて通し番号が対応付けられており、
前記走査線の通し番号のうち所定番号を、前記階調データを構成するビット列の最下位ビット（０桁目）に対応する初期値として決定し、
前記乗算結果から前記分割した数値群のうち最も小さい数値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、前記階調データを構成するビット列の前記最下位ビットの次のビット（１桁目）に対応する初期値として決定し、
前記階調データのその他のビットについては、当該その他のビットの小さい桁のビットから順に、前記分割した数値群の数値のうち当該ビットのビット桁数に該当する値番目に小さい数値を選択し、前記乗算結果から前記分割した数値群のうち一番小さい数値から前記選択された数値までの合計値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、当該ビットに対応付ける初期値として決定し、
まず、前記最下位ビットに対応する初期値が示す通し番号の走査線を選択し、次に、当該最下位ビットから最上位ビットに向けて順番にシフトした各ビットに対応する前記初期値が示す通し番号の走査線をそれぞれ順番に選択するように選択順番を決定する第１の処理と、
前記階調データの各ビットに対応付けられた値にそれぞれ１を加算すると共に、前記加算後の前記階調データの各ビットに対応する値が前記走査線の総数から１を減算した値を超えたときに、その値を前記通し番号の最小値に更新する第２の処理と、前記第２の処理後の前記階調データの各ビットに対応付けられた値に対応した走査線を前記第１の処理と同様の順番で選択するように選択順番を決定する第３の処理と、を含み、
前記階調データを構成するビット列の各ビット毎に前記走査線の総本数から１減算した値分前記第２の処理と前記第３の処理とを繰り返し行うことで前記走査線の選択順番を決定することを特徴としている。
【００２５】
ここで、本発明は、第１の発明における走査線の選択順番を決定するためのプログラムであり、その効果は重複するので記載を省略する。
また、第６の発明は、第５の発明において、前記ビット数Ｂが４のとき、前記Ｍ_ｉ（ｉ＝１〜４）を、それぞれＭ_１＝（１／１５）Ｘ±（１／６０）Ｘ、Ｍ_２＝（２／１５）Ｘ±（１／４０）Ｘ、Ｍ_３＝（４／１５）Ｘ±（１／３０）Ｘ及びＭ_４＝（８／１５）Ｘ±（１／２０）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００２６】
ここで、本発明は、第２の発明における走査線の選択順番を決定するためのプログラムであり、その効果は重複するので記載を省略する。
また、第７の発明は、第５又は第６の発明において、前記ビット数Ｂが６のとき、前記Ｍ_ｉ（ｉ＝１〜６）を、それぞれＭ_１＝（１／６０）Ｘ±（１／２４０）Ｘ、Ｍ_２＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_３＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_４＝（６１／４８０）Ｘ±（１／８０）Ｘ、Ｍ_５＝（６１／２４０）Ｘ±（１／８０）Ｘ及びＭ_６＝（６１／１２０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００２７】
ここで、本発明は、第３の発明における走査線の選択順番を決定するためのプログラムであり、その効果は重複するので記載を省略する。
また、第８の発明は、第５乃至第７のいずれか１の発明において、前記ビット数Ｂが８のとき、前記Ｍ_ｉ（ｉ＝１〜８）を、それぞれＭ_１＝（１／２４０）Ｘ±（１／４８０）Ｘ、Ｍ_２＝（７／９６０）Ｘ±（１／３２０）Ｘ、Ｍ_３＝（７／４８０）Ｘ±（１／２４０）Ｘ、Ｍ_４＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_５＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_６＝（１／８）Ｘ±（１／９６）Ｘ、Ｍ_７＝（１／４）Ｘ±（７／４８０）Ｘ及びＭ_８＝（２４１／４８０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００２８】
ここで、本発明は、第４の発明における走査線の選択順番を決定するためのプログラムであり、その効果は重複するので記載を省略する。
また、第９の発明は、光学素子を含む画素がマトリクス状に配列された画素マトリクスと、
前記画素マトリクスの行方向及び列方向のうち一方に沿って配列された画素群にそれぞれ接続する複数の走査線と、
前記画素マトリクスの行方向及び列方向のうち他方に沿って配列された画素群にそれぞれ接続する複数のデータ線と、
前記複数の走査線を、順次１つずつ選択する走査線駆動回路と、
前記光学素子の発光に係る制御信号を前記複数のデータ線のうち少なくとも１つのデータ線に出力するデータ線駆動回路と、
前記走査線駆動回路及び前記データ線駆動回路の動作を制御する制御部と、を備え、前記画素マトリクスと前記複数の走査線と前記複数のデータ線とによって形成される表示領域に所定画像を表示する電気光学装置において、前記走査線の選択順番を決定するための方法であって、
前記走査線の総数Ｘ（Ｘは整数）及び前記光学素子の発光階調を示す階調データのビット数Ｂ（Ｂは整数）を取得し、
以下の式の関係となるように当該式における適切なＭ_ｉを決定し、
【００２９】
【数６】

【００３０】
前記走査線の総数Ｘに前記階調データのビット数Ｂを乗算した乗算結果を、Ｍ_１，Ｍ_２，・・・，Ｍ_Ｂからなる前記ビット数Ｂ個の数値群に分割することで、
前記乗算結果を前記ビット数Ｂ個の２^ｎ値（ｎ＝０，１，２，・・・，（Ｂ−１））から成る比率に応じた数値に分割した数値群を生成し、
更に、前記走査線のそれぞれには、予めその並び順に合わせて通し番号が対応付けられており、
前記走査線の通し番号のうち所定番号を、前記階調データを構成するビット列の最下位ビット（０桁目）に対応する初期値として決定し、
前記乗算結果から前記分割した数値群のうち最も小さい数値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、前記階調データを構成するビット列の前記最下位ビットの次のビット（１桁目）に対応する初期値として決定し、
前記階調データのその他のビットについては、当該その他のビットの小さい桁のビットから順に、前記分割した数値群の数値のうち当該ビットのビット桁数に該当する値番目に小さい数値を選択し、前記乗算結果から前記分割した数値群のうち一番小さい数値から前記選択された数値までの合計値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、当該ビットに対応付ける初期値として決定し、
まず、前記最下位ビットに対応する初期値が示す通し番号の走査線を選択し、次に、当該最下位ビットから最上位ビットに向けて順番にシフトした各ビットに対応する前記初期値が示す通し番号の走査線をそれぞれ順番に選択するように選択順番を決定する第１の処理を行い、
前記階調データの各ビットに対応付けられた値にそれぞれ１を加算すると共に、前記加算後の前記階調データの各ビットに対応する値が前記走査線の総数から１を減算した値を超えたときに、その値を前記通し番号の最小値に更新する第２の処理と、
前記第２の処理後の前記階調データの各ビットに対応付けられた値に対応した走査線を前記第１の処理と同様の順番で選択するように選択順番を決定する第３の処理と、を
前記階調データを構成するビット列の各ビット毎に前記走査線の総本数から１減算した値分繰り返し行うことで前記走査線の選択順番を決定することを特徴としている。
【００３１】
ここで、本発明は、第１の発明である電気光学装置などにおいて実現されるものであり、その効果は重複するので記載を省略する。
また、第１０の発明は、第９の発明において、前記ビット数Ｂが４のとき、前記Ｍ_ｉ（ｉ＝１〜４）を、それぞれＭ_１＝（１／１５）Ｘ±（１／６０）Ｘ、Ｍ_２＝（２／１５）Ｘ±（１／４０）Ｘ、Ｍ_３＝（４／１５）Ｘ±（１／３０）Ｘ及びＭ_４＝（８／１５）Ｘ±（１／２０）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００３２】
ここで、本発明は、第２の発明である電気光学装置などにおいて実現されるものであり、その効果は重複するので記載を省略する。
また、第１１の発明は、第９又は第１０の発明において、前記ビット数Ｂが６のとき、前記Ｍ_ｉ（ｉ＝１〜６）を、それぞれＭ_１＝（１／６０）Ｘ±（１／２４０）Ｘ、Ｍ_２＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_３＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_４＝（６１／４８０）Ｘ±（１／８０）Ｘ、Ｍ_５＝（６１／２４０）Ｘ±（１／８０）Ｘ及びＭ_６＝（６１／１２０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成することを特徴としている。
【００３３】
ここで、本発明は、第３の発明である電気光学装置などにおいて実現されるものであり、その効果は重複するので記載を省略する。
また、第１２の発明は、第９乃至第１１のいずれか１の発明において、前記ビット数Ｂが８のとき、前記Ｍ_ｉ（ｉ＝１〜８）を、それぞれＭ_１＝（１／２４０）Ｘ±（１／４８０）Ｘ、Ｍ_２＝（７／９６０）Ｘ±（１／３２０）Ｘ、Ｍ_３＝（７／４８０）Ｘ±（１／２４０）Ｘ、Ｍ_４＝（１／３２）Ｘ±（１／１６０）Ｘ、Ｍ_５＝（１／１６）Ｘ±（１／１２０）Ｘ、Ｍ_６＝（１／８）Ｘ±（１／９６）Ｘ、Ｍ_７＝（１／４）Ｘ±（７／４８０）Ｘ及びＭ_８＝（２４１／４８０）Ｘ±（１／４８）Ｘより決定することで、前記数値群を生成することを特徴としている。
ここで、本発明は、第４の発明である電気光学装置などにおいて実現されるものであり、その効果は重複するので記載を省略する。
【００３４】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図１乃至図５は、本発明に係る電気光学装置の実施の形態を示す図である。
まず、本発明に係る電気光学装置の構成を図１に基づいて説明する。図１は、本発明に係る電気光学装置の構成を示すブロック図である。
【００３５】
電気光学装置１１は、パネル１１ａと、走査線駆動部１１ｂと、データ線駆動部１１ｃと、制御部１１ｄと、メモリ１１ｅと、画像データ取得部１１ｆと、を含んだ構成となっている。
パネル１１ａは、スイッチングトランジスタとドライビングトランジスタと光学素子と保持容量コンデンサとを含んで成る画素回路が複数の走査線と複数のデータ線との交点にマトリクス状に設けられて構成されるものである。そして、後述する階調データのビット長に応じて前記光学素子の発光時間を制御することにより、パネル上に画像が階調表示される。
【００３６】
走査線駆動部１１ｂは、後述する制御部１１ｄの制御により、非順次走査における走査線の選択順番に基づき、走査線を駆動するものである。
データ線駆動部１１ｃは、後述する制御部１１ｄの制御により、データ線を駆動するものである。
制御部１１ｄは、後述する式（１）に従い走査線の選択順番を決定し、この順番による非順次走査によりパネル１１ａにおける画像表示領域の走査線を選択し、走査線駆動部１１ｂを制御することで当該選択された走査線に対応する画素回路を駆動させるものである。ここで、制御部１１ｄは、基本となる、垂直走査信号Ｖｓ、水平走査信号Ｈｓおよびドットクロック信号ＤＣＬＫ、階調データにしたがって、走査線駆動部１１ｂ及びデータ線駆動部１１ｃの駆動を制御する各種の信号を生成し、これら各部を制御する。
【００３７】
メモリ１１ｅは、画像データ取得部１１ｆにおいて所得した画像データを記憶するもので、本実施の形態においては、画像データを記憶する領域を二つ備え、且つ、制御部１１ｄにおいて決定された走査線の選択順番を記憶する専用の記憶領域を備えたものである。
画像データ取得部１１ｆは、所定のタイミング毎に外部からの画像データを取得するものである。取得された画像データは、メモリ１１ｅの記憶領域の一方に記憶される。
【００３８】
ここで、本実施の形態におけるパネル１１ａを構成する画素回路は、走査線駆動部１１ｂ及びデータ線駆動部１１ｃによる走査線及びデータ線の駆動に加え、制御部１１ｄからデータ線を介して供給されるｂｒｉｇｈｔ信号がｈｉｇｈ、又は、ｌｏｗと書き込まれることに応じてその動作が制御され、走査線が駆動されているいないに関わらず、ｂｒｉｇｈｔ信号がｈｉｇｈと書き込まれたときは光学素子を発光させ、ｌｏｗと書き込まれたときは光学素子を発光させないようになっている。また、本実施の形態において、光学素子は、エレクトロルミネッセンス素子とする。つまり、本実施の形態に係る電気光学装置１１は、データ線に印加する信号（ｂｒｉｇｈｔ信号）を２値的なビットデータとするとともに、このビットデータを用いて、１フレームの期間において光学素子の発光時間を制御する構成となっている。すなわち、光学素子の発光時間を階調データを構成するビット列の各ビットに対応した時間にしたがって制御することで、階調表示を行う構成となっている。
【００３９】
以下、電気光学装置１１のより具体的な動作を説明する。まず、制御部１１ｄは、パネル１１ａのサイズ（走査線数及びデータ線数）及び階調データのビット数に基づき、以下に示す式（１）に基づき、走査線数×階調データのビット数（ここでは、２４０×４＝９６０とする）の数値を、それぞれＭ_１＝（１／１５）×２４０±（１／６０）×２４０、Ｍ_２＝（２／１５）×２４０±（１／４０）×２４０、Ｍ_３＝（４／１５）×２４０±（１／３０）×２４０及びＭ_４＝（８／１５）×２４０±（１／２０）×２４０の各数値を用いて分割する。つまり、数値９６０を、Ｍ_１＝１６±４、Ｍ_２＝３２±６、Ｍ_３＝６４±８及びＭ_４＝１２８±１２の各数値に階調データのビット数４を乗算し、更にその乗算結果から１減算した結果の総和となるように分割することになる。
【００４０】
【数７】

【００４１】
但し、走査線の総数をＸ、階調データのビット数をＢ、分割定数をＭ_ｉ（ｉ＝１〜Ｂ）とする。ここで、分割定数Ｍ_ｉは、ＸにＢを乗算した数値を、１：２：４：８：・・・：２^Ｂ−１といった比に分割するためのものである。つまり、本実施の形態においては、２４０×４＝９６０＝（４×１６−１）＋（４×３２−１）＋（４×６４−１）＋（４×１２９−１）＝６３＋１２７＋２５５＋５１５となり、９６０は、６３、１２７、２５５及び５１５の各数値に分割される。ここではほぼ、１：２：４：８の比に分割されている。
【００４２】
更に、この分割された数値を用いて、階調データの各ビットに対応した最初に選択する走査線（以下、初期走査線と称す）を決定する。ここで、各走査線にその並び順に合わせて０〜２３９の通し番号を対応付ける。
まず、階調データのビット０（ＬＳＢ）の初期走査線として、通し番号０の示す走査線を決定する。次に、上記式（１）に基づき、走査線の総数と階調データのビット数を乗算した値を分割した数値群のうち最も小さい数値６３を用いて、（９６０−６３）／４＝２２４．２５を算出し、算出結果の２２４．２５に階調データの０ビット目に対応付けた初期値０を加算し、加算結果が整数でないので加算結果２２４．２５の小数点以下を切り上げて２２５を得る。そしてこの２２５に基づいて通し番号２２５の示す走査線を階調データの１ビット目の初期走査線として決定する。更に、前記分割した数値群のうち最も小さい数値６３に加え２番目に小さい数値１２７を用いて、（９６０−（６３＋１２７））／４＝１９２．５を算出し、算出結果の１９２．５に階調データの０ビット目に対応付けた初期値０を加算し、加算結果が整数でないので加算結果１９２．５の小数点以下を切り上げて１９３を得る。そしてこの１９３に基づいて通し番号１９３の示す走査線を階調データの２ビット目の初期走査線として決定する。そして最後に、前記分割した数値群のうち最も小さい数値６３から前記分割した数値群のうち３番目に小さい数値２５５まで、すなわち６３、１２７、２５５を用いて、（９６０−（６３＋１２７＋２５５））／４＝１２８．７５を算出し、算出結果の１２８．７５に階調データの０ビット目に対応付けた初期値０を加算し、加算結果が整数でないので加算結果１２８．７５の小数点以下を切り上げて１２９を得る。そしてこの１２９に基づいて通し番号１２９の示す走査線を階調データの３ビット目（ＭＳＢ）の初期走査線として決定する。
【００４３】
つまり、前記走査線の通し番号のうち最も若い番号（ここでは「０」）を、前記階調データを構成するビット列の最下位ビット（０桁目）に対応する前記走査線の通し番号の初期値として決定し、前記乗算結果（ここでは「９６０」）から前記分割した数値群のうち最も小さい数値（ここでは「６３」）を減算し且つこの減算結果を前記ビット数Ｂ（ここでは「４」）で除算した除算結果の数値に前記最下位ビットに対応付けた初期値（ここでは「０」）とを加算し、この加算結果の小数点以下を切り上げした数値を、前記最下位ビットの次のビット（１桁目）に対応する前記走査線の通し番号の初期値として決定し、前記階調データのその他のビットについては（ここでは、２ビット目と３ビット目）、当該その他のビットの小さい桁のビットから順に、前記分割した数値群の数値のうち当該ビットのビット桁数に該当する値番目に小さい数値を選択し、前記乗算結果から前記分割した数値群のうち一番小さい数値から前記選択された数値までの合計値を減算し且つこの減算結果を前記ビット数Ｂで除算した除算結果の数値と前記最下位ビットに対応付けた初期値とを加算し、且つ当該加算結果の数値が整数でないときに当該加算結果の数値の小数点以下を切り上げし、当該加算結果の数値に該当する前記通し番号を、当該ビットに対応付ける初期値として決定する。
【００４４】
従って、上記算出結果により、階調データのＬＳＢの初期走査線として０が、１ビット目の初期走査線として２２５が、２ビット目の初期走査線として１９３が、ＭＳＢの初期走査線として１２９が、それぞれ決定されることになる。
更に、初期走査線が決定されると、ＬＳＢ〜ＭＳＢの順（つまり、０→２２５→１９３→１２９）で走査線が選択されるようにその選択順番を決定し、以降は、これら初期走査線を示す各通し番号にそれぞれ１を加算していきその数値を同様の順番で選択するように順番を決定していく。つまり、０→２２５→１９３→１２９の順番が決定すると、これらの数値にそれぞれ１を加算して１、２２６、１９４及び１３０を算出し、これらがＬＳＢ〜ＭＳＢの順で選択されるように順番を決定する。すなわち、「０→２２５→１９３→１２９→１→２２６→１９４→１３０→２→２２７→１９５→１３１→・・・」といったように、１つ前に選択された走査線を示す通し番号に１を加算した通し番号の示す走査線をＬＳＢ〜ＭＳＢの順で選択されるように順番を決定する。
【００４５】
ここで、本実施の形態においては、加算結果の数値が通し番号の最大値である２３９を超える場合（つまり、１を加算した結果が２４０となる場合）は、この加算結果を０とする。つまり、「１５→２３９→２０７→１４３」の次は「１６→０→２０８→１４４」となる。
このようにして、階調データの各ビットに対して走査線の総数分（ここでは、２４０本分）の選択順番がそれぞれ決定すると、この走査線の選択順番をメモリ１１ｅに記憶する。
【００４６】
更に、走査線数２４０本で、階調データが６ビットの場合は、２４０×６＝１４４０を、Ｍ_１＝（１／６０）×２４０±（１／２４０）×２４０、Ｍ_２＝（１／３２）×２４０±（１／１６０）×２４０、Ｍ_３＝（１／１６）×２４０±（１／１２０）×２４０、Ｍ_４＝（６１／４８０）×２４０±（１／８０）×２４０、Ｍ_５＝（６１／２４０）×２４０±（１／８０）×２４０及びＭ_６＝（６１／１２０）×２４０±（１／４８）×２４０を用いて分割する。つまり、１４４０を、Ｍ_１＝４±１、Ｍ_２＝７．５±１．５、Ｍ_３＝１５±２、Ｍ_４＝３０．５±３、Ｍ_５＝６１±４及びＭ_６＝１２２±５の各数値に階調データのビット数６を乗算し、さらにその乗算結果から１減算した結果の総和となるように分割することになる。
【００４７】
この場合は、１４４０＝（４×６−１）＋（７×６−１）＋（１５×６−１）＋（３０×６−１）＋（６２×６−１）＋（１２３×６−１）＝２３＋４１＋８９＋１７９＋３７１＋７３７となりほぼ、１：２：４：８：１６：３２の比に分割されることになる。後は、上記と同様の方法により階調データの各ビットに対する初期走査線を決定する。
【００４８】
従って、階調データのＬＳＢの初期走査線として、通し番号「０」の示す走査線が、１ビット目の初期走査線として、（１４４０−２３）／６＝２３６．１７より、通し番号「２３７」の示す走査線が、２ビット目の初期走査線として、（１４４０−（２３＋４１））／６＝２２９．３３より、通し番号「２３０」の示す走査線が、３ビット目の初期走査線として、（１４４０−（２３＋４１＋８９））／６＝２１４．５より、通し番号「２１５」の示す走査線が、４ビット目の初期走査線として、（１４４０−（２３＋４１＋８９＋１７９））／６＝１８４．６７より、通し番号「１８５」の示す走査線が、ＭＳＢの初期走査線として、（１４４０−（２３＋４１＋８９＋１７９＋３７１））／６＝１２２．８３より、通し番号「１２３」の示す走査線が選択されるように順番が決定される。
【００４９】
更に、走査線数２４０本で、階調データが８ビットの場合は、２４０×８＝１９２０を、Ｍ_１＝（１／２４０）×２４０±（１／４８０）×２４０、Ｍ_２＝（７／９６０）×２４０±（１／３２０）×２４０、Ｍ_３＝（７／４８０）×２４０±（１／２４０）×２４０、Ｍ_４＝（１／３２）×２４０±（１／１６０）×２４０、Ｍ_５＝（１／１６）×２４０±（１／１２０）×２４０、Ｍ_６＝（１／８）×２４０±（１／９６）×２４０、Ｍ_７＝（１／４）×２４０±（７／４８０）×２４０及びＭ_８＝（２４１／４８０）×２４０±（１／４８）×２４０を用いて分割する。つまり、１９２０を、Ｍ_１＝１±０．５、Ｍ_２＝１．７５±０．７５、Ｍ_３＝３．５±１、Ｍ_４＝７．５±１．５、Ｍ_５＝１５±２、Ｍ_６＝３０±２．５、Ｍ_７＝６０±３．５及びＭ_８＝１２０．５±５の各数値に階調データのビット数８を乗算し、さらにその乗算結果から１減算した結果の総和となるように分割することになる。
【００５０】
この場合は、１９２０＝（１×８−１）＋（２×８−１）＋（４×８−１）＋（７．５×８−１）＋（１５×８−１）＋（３０×８−１）＋（６０×８−１）＋（１２１．５×８−１）＝７＋１５＋３１＋５９＋１１９＋２３９＋４７９＋９７１となりほぼ、１：２：４：８：１６：３２：６４：１２８の比に分割されることになる。後は、上記と同様の方法により階調データの各ビットに対する初期走査線を決定する。
【００５１】
従って、階調データのＬＳＢの初期走査線として、通し番号「０」の示す走査線が、１ビット目の初期走査線として、（１９２０−７）／８＝２３９．１３より、通し番号「２４０」の示す走査線が、２ビット目の初期走査線として、（１９２０−（７＋１５））／８＝２３７．２５より、通し番号「２３８」の示す走査線が、３ビット目の初期走査線として、（１９２０−（７＋１５＋３１））／８＝２３３．３８より、通し番号「２３４」の示す走査線が、４ビット目の初期走査線として、（１９２０−（７＋１５＋３１＋５９））／８＝２２６より、通し番号「２２６」の示す走査線が、５ビット目の初期走査線として、（１９２０−（７＋１５＋３１＋５９＋１１９））／８＝２１１．１３より、通し番号「２１２」の示す走査線が、６ビット目の初期走査線として、（１９２０−（７＋１５＋３１＋５９＋１１９＋２３９））／８＝１８１．２５より、通し番号「１８２」の示す走査線が、ＭＳＢの初期走査線として、（１９２０−（７＋１５＋３１＋５９＋１１９＋２３９＋４７９））／８＝１２１．３８より、通し番号「１２２」の示す走査線が選択されるように順番が決定される。
【００５２】
更に、図２に基づき、非順次走査処理について詳細を説明する。図２は、パネル１１ａの走査線数が１４本で、階調データが４ビットの場合の走査線の選択される様子を示す図である。
ここで、説明の便宜上、本実施の形態では、パネル１１ａを、走査線の総本数を１４本とし、データ線の総本数１６本とし、階調データを４ビットとして、これら走査線とデータ線の交差部分に画素回路を配設した構成とし、本装置１１を、１４行×１６列のマトリクス型表示装置として説明する。但し、本発明をこれに限定する趣旨ではない。また、走査線にはその並び順に合わせて０〜１３の通し番号が対応付けられている。
【００５３】
この場合は、走査線の総数１４本に４を乗算した５６を分割することになるが、詳細な説明を省略する。ここでは、階調データの各ビットの初期走査線は、ＬＳＢは通し番号「０」の走査線が、１ビット目は通し番号「１３」の走査線が、２ビット目は通し番号「１１」の走査線が、ＭＳＢは通し番号「７」の走査線が選択されるように順番が決定される。以降は、上記同様にこれら初期走査線の通し番号に順々に１を加算していくことで、各ビットに対する走査線の選択順番を決定する。
【００５４】
更に、画像取得部１１ｆは、ＰＣ等の外部装置から画像データを取得すると、取得した画像データをメモリ１１ｅに記憶する。メモリ１１ｅの２つの記憶領域のいずれか一方に画像データが記憶されると、決定された選択順番を読み出し、この決定された選択順番に従って、まず、階調データの、ＬＳＢに対応した初期走査線、１ビット目に対応した初期走査線、２ビット目に対応した初期走査線、ＭＳＢに対応した初期走査線の順でそれぞれ対応する通し番号の走査線を選択していき、且つ、選択された走査線の各画素を駆動していく。そして、各走査線の選択後は階調データの各ビットに対応した初期走査線の通し番号にそれぞれ１を加算した通し番号の走査線を選択していく。つまり、図２に示すように、階調データの各ビットに対応して、０番目の走査線、１３番目の走査線、１１番目の走査線、７番目の走査線を選択すると、以降は、１番目の走査線、０番目の走査線、１２番目の走査線、８番目の走査線を選択するように、各ビットに対応する１つ前に選択した走査線の通し番号にそれぞれ１を加算した通し番号の走査線を順次選択し、画像データにおける対応する画素データに応じて各画素を駆動していく。
【００５５】
ここで、各ビットに対応した初期値に１を加算していった結果が走査線の総数を示す値（ここでは１３）を超えたときは、その加算結果を０にする。つまり、１３番目の走査線が選択され、その通し番号１３に１を加算したときはその加算結果を走査線の通し番号１３を超える数値（１４）とせずに０とする。故に、次の処理では、０番目の走査線が選択されることになる。
【００５６】
更に、図３に基づき、制御部１１ｄにおける走査線の選択順番決定処理の流れを説明する。図３は、制御部１１ｄにおける走査線の選択順番決定処理を示すフローチャートである。なお、この処理は、制御部１１ｄによって行われるものである。
電気光学装置１１の電源を投入すると、図３に示すように、まずステップＳ３００に移行し、パネル１１ａからパネルサイズ（走査線数及びデータ線数）を取得してステップＳ３０２に移行する。
【００５７】
ステップＳ３０２では、取得したパネルサイズに対応した選択順番が記憶されていないか否かを判定し、記憶されていないと判定された場合（Ｙｅｓ）はステップＳ３０４に移行し、そうでない場合（Ｎｏ）は処理を終了する。
ステップＳ３０４に移行した場合は、取得した走査線数Ｘと予め有する階調データのビット数Ｂとの乗算を行いステップＳ３０６に移行する。
【００５８】
ステップＳ３０６では、乗算結果を式（１）に基づき分割してステップＳ３０８に移行する。ここで、分割の手順は、上記説明した内容と同様であるので説明を省略する。
ステップＳ３０８では、分割結果の数値に基づき、階調データの各ビットに対応した初期走査線の選択順番を決定しステップＳ３１０に移行する。ここで、初期走査線の決定手順は、上記説明した内容と同様であるので説明を省略する。
【００５９】
ステップＳ３１０では、決定された初期走査線の選択順番に基づき、残りの選択順番を決定してステップＳ３１２に移行する。
ステップＳ３１２では、決定された走査線の選択順番をメモリ１１ｅの専用の記憶領域に記憶して処理を終了する。
つまり、上記ステップＳ３００〜ステップＳ３１２の処理を行うことで、パネル１１ａのサイズが変更されても、電源投入時にパネル１１ａのサイズを取得して、適切な走査線の選択順番を決定することが可能である。
【００６０】
更に、図４に基づき、電気光学装置１１における画像データの取得処理の流れを説明する。図４は、電気光学装置１１における画像データの取得処理を示すフローチャートである。ここで、本実施の形態において、画像データを記憶するメモリ１１ｅの２つの記憶領域を、それぞれ記憶領域１及び記憶領域２と称する。図４に示すように、まずステップＳ４００に移行し、画像データが入力されたか否かを判定し、入力されたと判定された場合（Ｙｅｓ）はステップＳ４０２に移行し、そうでない場合（Ｎｏ）は取得するまで待機する。
【００６１】
ステップＳ４０２に移行した場合は、メモリ１１ｅの記憶領域１に対応するフラグであるＦ１がセット状態（専用のレジスタに１がセットされた状態）か否かを判定し、セット状態であると判定された場合（Ｙｅｓ）はステップＳ４０４に移行し、そうでない場合（Ｎｏ）はステップＳ４１２に移行する。
ここで、本実施の形態においては、Ｆ１がセット状態のときに、メモリ１１ｅの記憶領域１に未処理の画像データが記憶された状態であり、Ｆ１がクリア状態（専用のレジスタに０がセットされた状態）のときに、メモリ１１ｅの記憶領域１に処理済みの画像データが記憶されている状態か、何も記憶されていない状態か、あるいは画像データの書き込み中となる。
【００６２】
ステップＳ４０４に移行した場合は、メモリ１１ｅの記憶領域２に対応するフラグであるＦ２がセット状態（専用のレジスタに１がセットされた状態）か否かを判定し、セット状態であると判定された場合（Ｙｅｓ）はステップＳ４０６に移行し、そうでない場合（Ｎｏ）はステップＳ４０８に移行する。
ここで、本実施の形態においては、Ｆ１と同様に、Ｆ２がセット状態のときに、メモリ１１ｅの記憶領域２に未処理の画像データが記憶された状態であり、Ｆ２がクリア状態（専用のレジスタに０がセットされた状態）のときに、メモリ１１ｅの記憶領域２に処理済みの画像データが記憶されている状態か、何も記憶されていない状態か、あるいは画像データの書き込み中となる。
【００６３】
ステップＳ４０６に移行した場合は、メモリ１１ｅへのデータの書込みを禁止しステップＳ４０２に移行する。
つまり、メモリ１１ｅの記憶領域１及び記憶領域２の両方に未処理の画像データが記憶されている状態であり、この場合は、一方が処理されるまで、ステップＳ４００〜ステップＳ４０６の処理を繰り返し行うことになる。
【００６４】
一方、ステップＳ４０８に移行した場合は、Ｆ２に対応した記憶領域２に、入力された画像データを記憶してステップＳ４１０に移行する。
ステップＳ４１０では、メモリ１１ｅの記憶領域２に対応したフラグＦ２をセットしてステップＳ４００に移行する。
また、ステップＳ４０２において、Ｆ１がクリア状態で、ステップＳ４１２に移行した場合は、Ｆ１に対応した記憶領域１に、入力された画像データを記憶してステップＳ４１４に移行する。
【００６５】
ステップＳ４１４では、メモリ１１ｅの記憶領域１に対応したフラグＦ１をセットしてステップＳ４００に移行する。
つまり、画像データが入力されると、メモリ１１ｅの記憶領域に対してフラグがセットされているか否かを判定し、フラグのセットされていない方の記憶領域に画像データを記憶する。これにより、一方の記憶領域のフラグがセット状態であっても、もう一方の記憶領域のフラグがセット状態でなければ、画像データを記憶することが可能である。
【００６６】
更に、図５に基づき、画像光学装置１１の非順次走査による画像表示処理の流れを説明する。図５は、画像光学装置１１の非順次走査による画像表示処理を示すフローチャートである。
図５に示すように、まずステップＳ５００に移行し、制御部１１ｄにおいて、メモリ１１ｅの記憶領域１に対応するフラグＦ１がセット状態か否かを判定し、セット状態であると判定された場合（Ｙｅｓ）はステップＳ５０２に移行し、そうでない場合（Ｎｏ）はステップＳ５１２に移行する。
【００６７】
ステップＳ５０２に移行した場合は、制御部１１ｄにおいて、メモリ１１ｅの専用の記憶領域に記憶された走査線の選択順番を読み出してステップＳ５０４に移行する。
ステップＳ５０４では、制御部１１ｄにおいて、読み出した選択順番に応じて、選択されたセットされたフラグに対応する記憶領域から、画像データにおける対応する画素データを読み出しステップＳ５０６に移行する。
【００６８】
ステップＳ５０６では、そのときの選択順番に応じて走査線を選択しステップＳ５０８に移行する。
ステップＳ５０８では、制御部１１ｄによって、データ線駆動部１１ｃを制御し選択した走査線に対応するデータ線の画素回路を読み出した画素データに応じて駆動しステップＳ５１０に移行する。
【００６９】
ステップＳ５１０では、制御部１１ｄにおいて、画像表示が完了したか否かを判定し、完了したと判定された場合（Ｙｅｓ）はステップＳ５００に移行し、そうでない場合（Ｎｏ）はステップＳ５０４に移行する。
また、ステップＳ５００において、フラグＦ１がセット状態では無くステップＳ５１２に移行した場合は、制御部１１ｄにおいて、メモリ１１ｅの記憶領域２に対応するフラグＦ２がセット状態か否かを判定し、セット状態であると判定された場合（Ｙｅｓ）はステップＳ５０２に移行し、そうでない場合（Ｎｏ）はステップＳ５００に移行する。
【００７０】
以上、制御部１１ｄにおいて、上記した手順により非順次走査における走査線の選択順番を決定することで、パネル１１ａのサイズに応じた走査線の選択順番を決定することが可能である。
また、上記した式（１）を利用して、選択順番を決定することで、画像の正確な階調表示が可能となる。
【００７１】
ここで、図１に示す、走査線駆動部１１ｂは、第１、第５及び第９の発明に記載の走査線駆動回路に対応し、データ線駆動部１１ｃは、第１、第５及び第９の発明に記載のデータ線駆動回路に対応する。
なお、上記実施の形態においては、パネル１１ａのサイズに応じて、その都度走査線の選択順番を決定するようになっているが、これに限らず、電気光学装置１１の量産時などにおいて、パネル１１ａのサイズが固定な場合などは、上記手順によって、予めパネル１１ａのサイズに応じた走査線の選択順番を決定し固定的に用意しておくようにしても良い。
【００７２】
また、上記実施の形態においては、パネル１１ａの全体のサイズを取得してそのサイズに応じて走査線の選択順番を決定するようになっているが、これに限らず、パネル１１ａにおける所定領域のサイズ（走査線数及びデータ線数）を取得して、このサイズに応じて走査線の選択順番を決定するようにしても良いし、パネル１１ａの複数の所定領域におけるサイズをそれぞれ取得して、複数の所定領域に対する走査線の選択順番を決定するようにしても良い。
【図面の簡単な説明】
【図１】本発明に係る電気光学装置の構成を示すブロック図である。
【図２】パネル１１ａの走査線数が１４本で、階調データが４ビットの場合の走査線の選択される様子を示す図である。
【図３】制御部１１ｄにおける走査線の選択順番決定処理を示すフローチャートである。
【図４】電気光学装置１１における画像データの取得処理を示すフローチャートである。
【図５】画像光学装置１１の非順次走査による画像表示処理を示すフローチャートである。
【符号の説明】
１１…電気光学装置、１１ａ…パネル、１１ｂ…走査線駆動部、１１ｃ…データ線駆動部、１１ｄ…制御部、１１ｅ…メモリ、１１ｆ…画像データ取得部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electro-optical device, and more particularly, to an electro-optical device suitable for suppressing display unevenness of an image by gradation display, a drive control program thereof, and a scanning line selection order determining method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an electro-optical device, for example, a liquid crystal display device using liquid crystal as an electro-optical material has been widely used as a display device in place of a cathode ray tube (CRT) in a display unit of various information processing equipment and a liquid crystal television. Here, in the conventional electro-optical device, for example, an element substrate provided with pixel electrodes arranged in a matrix, switching elements connected to the pixel electrodes, and a counter electrode facing the pixel electrodes are formed. It is composed of an opposing substrate and a liquid crystal as an electro-optical material filled between the two substrates. Then, in such a configuration, when one certain scanning line is selected, the switching element becomes conductive. In this conduction state, when an image signal of a voltage corresponding to the gradation is applied to the pixel electrode via the data line, a charge corresponding to the voltage of the image signal is applied to the liquid crystal layer between the pixel electrode and the counter electrode. Is accumulated. After the charge storage, even if the switching element is turned off, the charge storage in the liquid crystal layer is maintained by the capacitance of the liquid crystal layer itself, the storage capacitance, and the like. As described above, when each switching element is driven and the amount of charge to be stored is controlled according to the gradation, the alignment state of the liquid crystal changes for each pixel. For this reason, since the density changes for each pixel, it is possible to perform gradation display.
[0003]
At this time, since it is sufficient to accumulate charges in the liquid crystal layer of each pixel during a part of the period, first, each scanning line is sequentially selected, and second, the pixels intersecting with the selected scanning line are selected. By applying an image signal having a voltage corresponding to the gradation of the pixel to the corresponding data line, time-division multiplex driving in which the scanning line and the data line are shared by a plurality of pixels can be performed.
[0004]
However, the image signal applied to the data line is a voltage corresponding to the gradation of the pixel, that is, an analog signal. For this reason, a peripheral circuit of the electro-optical device requires a D / A conversion circuit, an operational amplifier, and the like, thereby increasing the cost of the entire device. Further, display unevenness occurs due to the characteristics of the D / A conversion circuit and the operational amplifier and the non-uniformity of various wiring resistances, so that it is extremely difficult to perform high-quality display. There is a problem that it becomes remarkable when displaying. There is also a problem such as an increase in power consumption due to the D / A conversion circuit and the operational amplifier.
[0005]
Therefore, a method of controlling the light emission time of the electro-optical element to obtain a gradation has been developed. In this method, a binary signal (digital signal) indicating whether or not the electro-optical element emits light may be supplied to the data line, and there is an advantage that the above-described analog circuit which adversely affects image quality is not required. However, there is a problem that the time for selecting a scanning line is too long in performing this control.
[0006]
Therefore, a non-sequential scanning method has been developed as a driving method of a liquid crystal display using a digital signal to solve the above problem. This is equivalent to the number of bits of a bit string constituting grayscale data having a bit length N indicating the light emission grayscale of the optical element. ⁿ The light emission time of this optical element is controlled by non-sequentially selecting scanning lines using a group of numerical values corresponding to the ratio of the values (n = 0, 1, 2,..., (N−1)). In this method, a gray scale is obtained by performing the above operation (for example, see Patent Document 1).
[0007]
[Patent Document 1]
JP-A-2001-166730.
[0008]
[Problems to be solved by the invention]
However, although the principle of the non-sequential scanning method is described in theory, the procedure for actually realizing the method is not clarified.
In addition, the scanning line selection order is determined in advance according to the number of the scanning lines to be controlled and the number of gradations, and the data in the predetermined order is stored in a memory of a control unit that controls each driving circuit of the electro-optical device. Although the program is stored and controlled, an appropriate program for determining the selection order in the non-sequential scanning method is not clarified.
[0009]
Therefore, the present invention has been made by focusing on the unsolved problems of the conventional technology, and is suitable for displaying an image using a scanning line selection process by a non-sequential scanning method. An object of the present invention is to provide an electro-optical device, an electro-optical device control program, and a scanning line selection order determining method.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, an electro-optical device according to the present invention includes a pixel matrix in which pixels including optical elements are arranged in a matrix,
A plurality of scanning lines respectively connected to a pixel group arranged along one of a row direction and a column direction of the pixel matrix;
A plurality of data lines respectively connected to a pixel group arranged along the other of the row direction and the column direction of the pixel matrix,
A scanning line driving circuit for sequentially selecting the plurality of scanning lines one by one;
A data line drive circuit that outputs a control signal related to light emission of the optical element to at least one data line of the plurality of data lines;
A control unit that controls operations of the scanning line driving circuit and the data line driving circuit, and displays a predetermined image in a display area formed by the pixel matrix, the plurality of scanning lines, and the plurality of data lines. Electro-optical device,
The control unit includes:
When the total number X of the scanning lines (X is an integer) and the bit number B (B is an integer) of the gradation data indicating the light emission gradation of the optical element are obtained,
Appropriate M in the equation so that the following equation is satisfied _i To determine
[0011]
(Equation 4)

[0012]
A multiplication result obtained by multiplying the total number X of the scanning lines by the bit number B of the gradation data is represented by M ₁ , M ₂ , ..., M _B By dividing into a numerical group having the number of bits B consisting of
The result of the multiplication is calculated by dividing the number of bits B by 2 ⁿ Generate a numerical group divided into numerical values according to the ratio consisting of the values (n = 0, 1, 2,..., (B-1)),
Further, a serial number is associated with each of the scanning lines in advance according to the arrangement order,
A predetermined number among the serial numbers of the scanning lines is determined as an initial value corresponding to the least significant bit (0th digit) of a bit string constituting the gradation data;
Subtracting the smallest numerical value among the divided numerical value groups from the multiplication result, and adding a numerical value of a division result obtained by dividing the subtraction result by the bit number B and an initial value associated with the least significant bit; and When the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is the next to the least significant bit of the bit string forming the gradation data. Determined as the initial value corresponding to the bit (first digit),
For the other bits of the gradation data, in order from the bit of the smaller digit of the other bits, among the numerical values of the divided numerical value group, select the numerically smallest value corresponding to the bit digit number of the bit, From the multiplication result, subtract the total value from the smallest numerical value to the selected numerical value in the divided numerical value group, and divide the subtraction result by the bit number B to obtain a numerical value of a division result and the least significant bit. The initial value associated with the bit is added, and when the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is associated with the bit. Determined as a value,
First, a scanning line having a serial number indicated by an initial value corresponding to the least significant bit is selected, and then a serial number indicated by the initial value corresponding to each bit sequentially shifted from the least significant bit to the most significant bit. A first process of determining a selection order so that each of the scan lines is sequentially selected;
1 is added to the value associated with each bit of the gradation data, and the value corresponding to each bit of the gradation data after the addition exceeds a value obtained by subtracting 1 from the total number of the scanning lines. A second process for updating the value to the minimum value of the serial number, and a scanning line corresponding to a value associated with each bit of the gradation data after the second process. And a third processing for determining the selection order so as to select in the same order as the processing of
The selection order of the scanning lines is determined by repeatedly performing the second processing and the third processing by a value obtained by subtracting 1 from the total number of the scanning lines for each bit of the bit string constituting the gradation data. The scanning line driving circuit is configured to select the scanning line based on the determined selection order.
[0013]
With such a configuration, according to the first invention, a plurality of scanning lines can be sequentially selected one by one by a scanning line driving circuit. It is possible to output a control signal to at least one of the plurality of data lines, and the control unit determines the selection order of the scanning lines in the non-sequential scanning by the above procedure, and the determined selection order It is possible to control the operation of the scanning line driving circuit based on.
[0014]
That is, by determining the order of selecting the scanning lines by the above-described procedure, the scanning line corresponding to each bit of the gradation data can be selected, and the non-sequential scanning method can be realized. Therefore, it is possible to suppress display unevenness in high-definition image display and the like.
Here, when generating the numerical value group as described above, when it is not possible to divide the total number of scanning lines × the bit number B of the gradation data at an accurate ratio (division by an integer corresponding to the ratio), This is dealt with by dividing the value into a value close to the value corresponding to the ratio. For example, when the total number of the scanning lines is 59 and the number of bits of the gradation data is 4 bits, the division is performed at a ratio of 1: 2: 4: 8. In this case, the division cannot be performed accurately. Since there is a portion, a portion that cannot be divided into numerical values having an accurate ratio, such as 15, 31, 63, 127 (1: 2.1: 4.2: 8.5), is set as a nearby value.
[0015]
Also, there is an expression "update the serial number to the next number", which is, for example, 0, 1, 2, 3, ..., (X-1) and "1" for the scanning line. When the serial numbers are associated with each other, the result of adding or subtracting 1 to the serial numbers becomes the next number, and 0, 2, 4, 6,..., (2 × (X−1)) When the serial numbers are associated in units of "2" and "2", the result of adding or subtracting 2 to the serial numbers is the next number. That is, the update result is obtained by increasing or decreasing the current serial number by one unit of the serial number.
[0016]
The above-described optical element is, for example, a liquid crystal, an electroluminescent element, a plasma display, a light emitting diode, or the like.
Further, according to the second invention, in the first invention, when the number of bits B is 4, the M _i (I = 1 to 4) by M ₁ = (1/15) X ± (1/60) X, M ₂ = (2/15) X ± (1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X to generate the numerical value group.
[0017]
That is, M in the equation (1) shown in the first invention _i (I = 1 to 4) by M ₁ = (1/15) X ± (1/60) X, M ₂ = (2/15) X ± (1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X to generate the numerical value group. By performing non-sequential scanning in accordance with the selection order of the scanning lines determined based on the numerical value group, in the electro-optical device having the total number of scanning lines of X and the number of bits of the gradation data of 4, the display unevenness in the image display is obtained. Can be suppressed.
[0018]
In a third aspect based on the first or second aspect, when the number of bits B is 6, the M _i (I = 1 to 6) by M ₁ = (1/60) X ± (1/240) X, M ₂ = (1/32) X ± (1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± (1/80) X and M ₆ = (61/120) X ± (1/48) X to generate the numerical value group.
[0019]
That is, M in the equation (1) shown in the first invention _i (I = 1 to 6) by M ₁ = (1/60) X ± (1/240) X, M ₂ = (1/32) X ± (1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± (1/80) X and M ₆ = (61/120) X ± (1/48) X to generate the numerical value group. By performing non-sequential scanning according to the selection order of the scanning lines determined based on the numerical value group, in the electro-optical device having the total number of scanning lines of X and the number of bits of gradation data of 6, the display unevenness in the image display is obtained. Can be suppressed.
[0020]
In a fourth aspect based on any one of the first to third aspects, when the number of bits B is 8, the M _i (I = 1 to 8) by M ₁ = (1/240) X ± (1/480) X, M ₂ = (7/960) X ± (1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (1/8) X ± (1/96) X, M ₇ = (1/4) X ± (7/480) X and M ₈ = (241/480) X ± (1/48) X to generate the numerical value group.
[0021]
That is, M in the equation (1) shown in the first invention _i (I = 1 to 8) by M ₁ = (1/240) X ± (1/480) X, M ₂ = (7/960) X ± (1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (1/8) X ± (1/96) X, M ₇ = (1/4) X ± (7/480) X and M ₈ = (241/480) X ± (1/48) X to generate the numerical value group. By performing non-sequential scanning according to the scanning line selection order determined based on the numerical value group, in the electro-optical device having the total number of scanning lines of X and the number of bits of gradation data of 8, the display unevenness in image display is obtained. Can be suppressed.
[0022]
According to a fifth aspect of the present invention, there is provided a pixel matrix in which pixels including optical elements are arranged in a matrix,
A plurality of scanning lines respectively connected to a pixel group arranged along one of a row direction and a column direction of the pixel matrix;
A plurality of data lines respectively connected to a pixel group arranged along the other of the row direction and the column direction of the pixel matrix,
A scanning line driving circuit for sequentially selecting the plurality of scanning lines one by one;
A data line drive circuit that outputs a control signal related to light emission of the optical element to at least one data line of the plurality of data lines;
A control unit that controls operations of the scanning line driving circuit and the data line driving circuit, and displays a predetermined image in a display area formed by the pixel matrix, the plurality of scanning lines, and the plurality of data lines. In the electro-optical device, a program for determining the selection order of the scanning line,
When the total number X of the scanning lines (X is an integer) and the bit number B (B is an integer) of the gradation data indicating the light emission gradation of the optical element are obtained,
Appropriate M in the equation so that the following equation is satisfied _i To determine
[0023]
(Equation 5)

[0024]
A multiplication result obtained by multiplying the total number X of the scanning lines by the bit number B of the gradation data is represented by M ₁ , M ₂ , ..., M _B By dividing into a numerical group having the number of bits B consisting of
The result of the multiplication is calculated by dividing the number of bits B by 2 ⁿ Generate a numerical group divided into numerical values according to the ratio consisting of the values (n = 0, 1, 2,..., (B-1)),
Further, a serial number is associated with each of the scanning lines in advance according to the arrangement order,
A predetermined number among the serial numbers of the scanning lines is determined as an initial value corresponding to the least significant bit (0th digit) of a bit string constituting the gradation data;
Subtracting the smallest numerical value among the divided numerical value groups from the multiplication result, and adding a numerical value of a division result obtained by dividing the subtraction result by the bit number B and an initial value associated with the least significant bit; and When the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is the next to the least significant bit of the bit string forming the gradation data. Determined as the initial value corresponding to the bit (first digit),
For the other bits of the gradation data, in order from the bit of the smaller digit of the other bits, among the numerical values of the divided numerical value group, select the numerically smallest value corresponding to the bit digit number of the bit, From the multiplication result, subtract the total value from the smallest numerical value to the selected numerical value in the divided numerical value group, and divide the subtraction result by the bit number B to obtain a numerical value of a division result and the least significant bit. The initial value associated with the bit is added, and when the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is associated with the bit. Determined as a value,
First, a scanning line having a serial number indicated by an initial value corresponding to the least significant bit is selected, and then a serial number indicated by the initial value corresponding to each bit sequentially shifted from the least significant bit to the most significant bit. A first process of determining a selection order so that each of the scan lines is sequentially selected;
1 is added to the value associated with each bit of the gradation data, and the value corresponding to each bit of the gradation data after the addition exceeds a value obtained by subtracting 1 from the total number of the scanning lines. A second process for updating the value to the minimum value of the serial number, and a scanning line corresponding to a value associated with each bit of the gradation data after the second process. And a third process of determining the selection order so as to select in the same order as the process of
The selection order of the scanning lines is determined by repeatedly performing the second processing and the third processing by a value obtained by subtracting 1 from the total number of the scanning lines for each bit of the bit string constituting the gradation data. It is characterized by doing.
[0025]
Here, the present invention is a program for determining the selection order of the scanning lines in the first invention, and the description thereof will be omitted because the effects are duplicated.
In a sixth aspect based on the fifth aspect, when the number of bits B is 4, the M _i (I = 1 to 4) by M ₁ = (1/15) X ± (1/60) X, M ₂ = (2/15) X ± (1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X to generate the numerical value group.
[0026]
Here, the present invention is a program for determining the selection order of the scanning lines in the second invention, and the description thereof will be omitted because the effects are duplicated.
In a seventh aspect based on the fifth or sixth aspect, when the number of bits B is 6, the M _i (I = 1 to 6) by M ₁ = (1/60) X ± (1/240) X, M ₂ = (1/32) X ± (1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± (1/80) X and M ₆ = (61/120) X ± (1/48) X to generate the numerical value group.
[0027]
Here, the present invention is a program for determining the selection order of the scanning lines in the third invention, and the description thereof will be omitted because the effects are duplicated.
In an eighth aspect based on any one of the fifth to seventh aspects, when the number of bits B is 8, the M _i (I = 1 to 8) by M ₁ = (1/240) X ± (1/480) X, M ₂ = (7/960) X ± (1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (1/8) X ± (1/96) X, M ₇ = (1/4) X ± (7/480) X and M ₈ = (241/480) X ± (1/48) X to generate the numerical value group.
[0028]
Here, the present invention is a program for determining the selection order of the scanning lines in the fourth invention, and the description thereof will be omitted because the effects are duplicated.
In a ninth aspect, a pixel matrix in which pixels including optical elements are arranged in a matrix is provided.
A plurality of scanning lines respectively connected to a pixel group arranged along one of a row direction and a column direction of the pixel matrix;
A plurality of data lines respectively connected to a pixel group arranged along the other of the row direction and the column direction of the pixel matrix,
A scanning line driving circuit for sequentially selecting the plurality of scanning lines one by one;
A data line drive circuit that outputs a control signal related to light emission of the optical element to at least one data line of the plurality of data lines;
A control unit that controls operations of the scanning line driving circuit and the data line driving circuit, and displays a predetermined image in a display area formed by the pixel matrix, the plurality of scanning lines, and the plurality of data lines. In the electro-optical device, a method for determining the selection order of the scanning line,
Acquiring a total number X of the scanning lines (X is an integer) and a bit number B (B is an integer) of gradation data indicating a light emission gradation of the optical element;
Appropriate M in the equation so that the following equation is satisfied _i To determine
[0029]
(Equation 6)

[0030]
A multiplication result obtained by multiplying the total number X of the scanning lines by the bit number B of the gradation data is represented by M ₁ , M ₂ , ..., M _B By dividing into a numerical group having the number of bits B consisting of
The result of the multiplication is calculated by dividing the number of bits B by 2 ⁿ Generate a numerical group divided into numerical values according to the ratio consisting of the values (n = 0, 1, 2,..., (B-1)),
Further, a serial number is associated with each of the scanning lines in advance according to the arrangement order,
A predetermined number among the serial numbers of the scanning lines is determined as an initial value corresponding to the least significant bit (0th digit) of a bit string constituting the gradation data;
Subtracting the smallest numerical value among the divided numerical value groups from the multiplication result, and adding a numerical value of a division result obtained by dividing the subtraction result by the bit number B and an initial value associated with the least significant bit; and When the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is the next to the least significant bit of the bit string forming the gradation data. Determined as the initial value corresponding to the bit (first digit),
For the other bits of the gradation data, in order from the bit of the smaller digit of the other bits, among the numerical values of the divided numerical value group, select the numerically smallest value corresponding to the bit digit number of the bit, From the multiplication result, subtract the total value from the smallest numerical value to the selected numerical value in the divided numerical value group, and divide the subtraction result by the bit number B to obtain a numerical value of a division result and the least significant bit. The initial value associated with the bit is added, and when the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is associated with the bit. Determined as a value,
First, a scanning line having a serial number indicated by an initial value corresponding to the least significant bit is selected, and then a serial number indicated by the initial value corresponding to each bit sequentially shifted from the least significant bit to the most significant bit. Performing a first process of determining a selection order so as to sequentially select the scanning lines of
1 is added to the value associated with each bit of the gradation data, and the value corresponding to each bit of the gradation data after the addition exceeds a value obtained by subtracting 1 from the total number of the scanning lines. A second process of updating the value to the minimum value of the serial number when
A third process of determining a selection order so as to select a scanning line corresponding to a value associated with each bit of the gradation data after the second process in the same order as the first process; ,
It is characterized in that the selection order of the scanning lines is determined by repeatedly performing a value obtained by subtracting 1 from the total number of the scanning lines for each bit of the bit string constituting the gradation data.
[0031]
Here, the present invention is realized in the electro-optical device or the like according to the first invention, and the description thereof will be omitted because the effects are duplicated.
In a tenth aspect based on the ninth aspect, when the number of bits B is 4, the M _i (I = 1 to 4) by M ₁ = (1/15) X ± (1/60) X, M ₂ = (2/15) X ± (1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X to generate the numerical value group.
[0032]
Here, the present invention is realized in the electro-optical device or the like according to the second invention, and the description thereof will be omitted because the effects are duplicated.
In an eleventh aspect based on the ninth or tenth aspect, when the number of bits B is 6, the M _i (I = 1 to 6) by M ₁ = (1/60) X ± (1/240) X, M ₂ = (1/32) X ± (1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± (1/80) X and M ₆ = (61/120) X ± (1/48) X to generate the numerical value group.
[0033]
Here, the present invention is realized in the electro-optical device or the like according to the third invention, and the description thereof will be omitted because the effects are duplicated.
In a twelfth aspect based on any one of the ninth to eleventh aspects, when the number of bits B is 8, the M _i (I = 1 to 8) by M ₁ = (1/240) X ± (1/480) X, M ₂ = (7/960) X ± (1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (1/8) X ± (1/96) X, M ₇ = (1/4) X ± (7/480) X and M ₈ = (241/480) X ± (1/48) X to generate the numerical value group.
Here, the present invention is realized in the electro-optical device or the like according to the fourth invention, and the description thereof will be omitted because the effects are duplicated.
[0034]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 are views showing an embodiment of an electro-optical device according to the present invention.
First, the configuration of the electro-optical device according to the present invention will be described with reference to FIG. FIG. 1 is a block diagram illustrating a configuration of an electro-optical device according to the present invention.
[0035]
The electro-optical device 11 includes a panel 11a, a scanning line driving unit 11b, a data line driving unit 11c, a control unit 11d, a memory 11e, and an image data obtaining unit 11f.
The panel 11a is configured such that a pixel circuit including a switching transistor, a driving transistor, an optical element, and a storage capacitor is provided in a matrix at intersections of a plurality of scanning lines and a plurality of data lines. Then, by controlling the light emission time of the optical element according to the bit length of the gradation data described later, the image is displayed in gradation on the panel.
[0036]
The scanning line driving unit 11b drives the scanning lines based on the selection order of the scanning lines in the non-sequential scanning under the control of the control unit 11d described later.
The data line driving unit 11c drives the data lines under the control of the control unit 11d described later.
The control unit 11d determines the selection order of the scanning lines according to Expression (1) described later, selects the scanning lines of the image display area on the panel 11a by non-sequential scanning in this order, and controls the scanning line driving unit 11b. Drives the pixel circuit corresponding to the selected scanning line. Here, the control unit 11d controls the driving of the scanning line driving unit 11b and the data line driving unit 11c according to the basic vertical scanning signal Vs, horizontal scanning signal Hs, dot clock signal DCLK, and gradation data. And controls these components.
[0037]
The memory 11e stores the image data obtained by the image data obtaining unit 11f. In the present embodiment, the memory 11e includes two areas for storing image data, and stores the image data of the scanning line determined by the control unit 11d. It has a dedicated storage area for storing the selection order.
The image data acquisition unit 11f acquires image data from the outside at every predetermined timing. The acquired image data is stored in one of the storage areas of the memory 11e.
[0038]
Here, the pixel circuit configuring the panel 11a in the present embodiment is supplied from the control unit 11d via the data line in addition to the driving of the scanning line and the data line by the scanning line driving unit 11b and the data line driving unit 11c. The operation is controlled in response to the high signal being written as high or low, and the optical element emits light when the high signal is written as high, regardless of whether the scanning line is driven, When "low" is written, the optical element does not emit light. Also, in the present embodiment, the optical element is an electroluminescent element. That is, the electro-optical device 11 according to the present embodiment converts the signal (bright signal) to be applied to the data line into binary bit data, and uses the bit data to transmit the optical element during one frame period. The light emission time is controlled. That is, the gray scale display is performed by controlling the light emission time of the optical element in accordance with the time corresponding to each bit of the bit string forming the gray scale data.
[0039]
Hereinafter, a more specific operation of the electro-optical device 11 will be described. First, based on the size of the panel 11a (the number of scanning lines and the number of data lines) and the number of bits of gradation data, the control unit 11d determines the number of scanning lines × the number of bits of gradation data based on the following equation (1). (Here, 240 × 4 = 960) ₁ = (1/15) × 240 ± (1/60) × 240, M ₂ = (2/15) × 240 ± (1/40) × 240, M ₃ = (4/15) × 240 ± (1/30) × 240 and M ₄ = (8/15) × 240 ± (1/20) × 240 The division is performed using each numerical value. That is, the numerical value 960 is changed to M ₁ = 16 ± 4, M ₂ = 32 ± 6, M ₃ = 64 ± 8 and M ₄ = 128 ± 12 is multiplied by the bit number 4 of the gradation data, and further divided by 1 from the result of the multiplication.
[0040]
(Equation 7)

[0041]
Here, the total number of scanning lines is X, the number of bits of gradation data is B, and the division constant is M _i (I = 1 to B). Here, the division constant M _i Is a value obtained by multiplying X by B, and 1: 2: 4: 8:...: 2 ^B-1 This is for dividing the ratio. That is, in the present embodiment, 240 × 4 = 960 = (4 × 16-1) + (4 × 32-1) + (4 × 64-1) + (4 × 129-1) = 63 + 127 + 255 + 515, and 960 is divided into numerical values of 63, 127, 255 and 515. Here, it is almost divided into a ratio of 1: 2: 4: 8.
[0042]
Further, the first selected scanning line (hereinafter, referred to as an initial scanning line) corresponding to each bit of the gradation data is determined using the divided numerical values. Here, serial numbers from 0 to 239 are associated with each scanning line according to the arrangement order.
First, a scanning line indicated by a serial number 0 is determined as an initial scanning line of bit 0 (LSB) of the gradation data. Next, (960−63) / 4 = 224 using the smallest numerical value 63 in a numerical value group obtained by dividing a value obtained by multiplying the total number of scanning lines by the number of bits of gradation data based on the above equation (1). .25 is added to the calculation result 224.25, and the initial value 0 associated with the 0th bit of the gradation data is added. Since the addition result is not an integer, the addition result 224.25 is rounded up to the nearest decimal point to obtain 225. obtain. Then, based on this 225, the scanning line indicated by the serial number 225 is determined as the initial scanning line of the first bit of the gradation data. Furthermore, (960− (63 + 127)) / 4 = 192.5 is calculated by using the second smallest value 127 in addition to the smallest value 63 in the divided value group, and the result is calculated as 192.5. The initial value 0 associated with the 0th bit of the key data is added. Since the addition result is not an integer, 193 is obtained by rounding up the decimal point of the addition result 192.5. Then, based on this 193, the scanning line indicated by the serial number 193 is determined as the initial scanning line of the second bit of the gradation data. Finally, from the smallest numerical value 63 of the divided numerical value group to the third smallest numerical value 255 of the divided numerical value group, that is, 63, 127, 255, (960− (63 + 127 + 255)) / 4 = 128.75, and the initial value 0 associated with the 0th bit of the gradation data is added to 128.75 of the calculation result. Since the addition result is not an integer, the decimal point of the addition result 128.75 is rounded up. 129 are obtained. Then, based on this 129, the scanning line indicated by the serial number 129 is determined as the initial scanning line of the third bit (MSB) of the gradation data.
[0043]
That is, the smallest number (here, “0”) among the serial numbers of the scanning lines is set as the initial value of the serial number of the scanning line corresponding to the least significant bit (0th digit) of the bit string that forms the gradation data. Then, the smallest numerical value (here, “63”) of the divided numerical value group is subtracted from the multiplication result (here, “960”), and the subtraction result is used as the number of bits B (here, “4”). And the initial value (here, “0”) associated with the least significant bit is added to the numerical value of the result of the division, and the decimal value of the addition result is rounded up to the next bit of the least significant bit. It is determined as the initial value of the serial number of the scanning line corresponding to (first digit), and the other bits of the gradation data (here, the second and third bits) are the smaller digits of the other bits. No Sequentially from the numbers, the numerical value corresponding to the bit number of the bit is selected from among the numerical values of the divided numerical value group, and the selected numerical value is selected from the smallest numerical value of the divided numerical value groups from the multiplication result. And subtracting the total value up to the calculated value, dividing the result of the subtraction by the number of bits B, and adding the initial value associated with the least significant bit, and the value of the addition result is not an integer. In some cases, the decimal value of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is determined as an initial value corresponding to the bit.
[0044]
Therefore, according to the above calculation results, 0 is set as the initial scan line of the LSB of the gradation data, 225 is set as the initial scan line of the first bit, 193 is set as the initial scan line of the second bit, and 129 is set as the initial scan line of the MSB. , Respectively.
Further, when the initial scanning lines are determined, the selection order is determined so that the scanning lines are selected in the order of LSB to MSB (that is, 0 → 225 → 193 → 129). Is added to each of the serial numbers indicating, and the order is determined so that the numerical values are selected in the same order. That is, when the order of 0 → 225 → 193 → 129 is determined, 1 is added to these numerical values to calculate 1, 226, 194 and 130, and the order is set so that these are selected in the order of LSB to MSB. To determine. That is, 1 is added to the serial number indicating the scanning line selected immediately before, such as “0 → 225 → 193 → 129 → 1 → 226 → 194 → 130 → 2 → 227 → 195 → 131 →. The order is determined so that the scanning lines indicated by the added serial numbers are selected in the order of LSB to MSB.
[0045]
Here, in the present embodiment, when the numerical value of the addition result exceeds 239 which is the maximum value of the serial number (that is, when the result of adding 1 becomes 240), the addition result is set to 0. That is, "15 → 239 → 207 → 143" is followed by "16 → 0 → 208 → 144".
When the selection order for the total number of scanning lines (here, 240 lines) is determined for each bit of the gradation data, the selection order of the scanning lines is stored in the memory 11e.
[0046]
Further, when the number of scanning lines is 240 and the gradation data is 6 bits, 240 × 6 = 1440 is calculated by M ₁ = (1/60) × 240 ± (1/240) × 240, M ₂ = (1/32) × 240 ± (1/160) × 240, M ₃ = (1/16) × 240 ± (1/120) × 240, M ₄ = (61/480) × 240 ± (1/80) × 240, M ₅ = (61/240) × 240 ± (1/80) × 240 and M ₆ = (61/120) × 240 ± (1/48) × 240. That is, 1440 is replaced by M ₁ = 4 ± 1, M ₂ = 7.5 ± 1.5, M ₃ = 15 ± 2, M ₄ = 30.5 ± 3, M ₅ = 61 ± 4 and M ₆ = 122 ± 5 is multiplied by the bit number 6 of the gradation data, and further divided by 1 from the result of multiplication.
[0047]
In this case, 1440 = (4 × 6-1) + (7 × 6-1) + (15 × 6-1) + (30 × 6-1) + (62 × 6-1) + (123 × 6) -1) = 23 + 41 + 89 + 179 + 371 + 737, which is almost divided into a ratio of 1: 2: 4: 8: 16: 32. Thereafter, an initial scanning line for each bit of the gradation data is determined by the same method as described above.
[0048]
Therefore, the scanning line indicated by the serial number “0” as the LSB initial scanning line of the gradation data is the first bit initial scanning line from (1440−23) /6=236.17. The scanning line indicated by the serial number “230” is (1440− (23 + 41)) / 6 = 229.33 as the initial scanning line of the second bit. Based on − (23 + 41 + 89)) / 6 = 214.5, the scanning line indicated by the serial number “215” is set as the initial scanning line of the fourth bit, from (1440− (23 + 41 + 89 + 179)) / 6 = 184.67. Is the serial number “123” from (1440− (23 + 41 + 89 + 179 + 371)) / 6 = 122.83 as the MSB initial scanning line. Order is determined such scan line shown are selected.
[0049]
Further, when the number of scanning lines is 240 and the gradation data is 8 bits, 240 × 8 = 1920 ₁ = (1/240) × 240 ± (1/480) × 240, M ₂ = (7/960) × 240 ± (1/320) × 240, M ₃ = (7/480) × 240 ± (1/240) × 240, M ₄ = (1/32) × 240 ± (1/160) × 240, M ₅ = (1/16) × 240 ± (1/120) × 240, M ₆ = (1/8) × 240 ± (1/96) × 240, M ₇ = (１ ／) × 240 ± (7/480) × 240 and M ₈ = (241/480) × 240 ± (1/48) × 240. That is, 1920 is replaced by M ₁ = 1 ± 0.5, M ₂ = 1.75 ± 0.75, M ₃ = 3.5 ± 1, M ₄ = 7.5 ± 1.5, M ₅ = 15 ± 2, M ₆ = 30 ± 2.5, M ₇ = 60 ± 3.5 and M ₈ = 120.5 ± 5 is multiplied by the bit number 8 of the gradation data, and further divided by 1 from the result of multiplication.
[0050]
In this case, 1920 = (1 × 8-1) + (2 × 8-1) + (4 × 8-1) + (7.5 × 8-1) + (15 × 8-1) + (30 × 8-1) + (60 × 8-1) + (121.5 × 8-1) = 7 + 15 + 31 + 59 + 119 + 239 + 479 + 971, which is almost a ratio of 1: 2: 4: 8: 16: 32: 64: 128. become. Thereafter, an initial scanning line for each bit of the gradation data is determined by the same method as described above.
[0051]
Therefore, the scanning line indicated by the serial number “0” is the initial scanning line of the LSB of the gradation data, and the initial scanning line of the first bit is (1920-7) /8=239.13. The scanning line indicated by the serial number “238” is (1920− (7 + 15)) / 8 = 237.25 as the initial scanning line of the second bit. − (7 + 15 + 31)) / 8 = 233.38, the scanning line indicated by the serial number “234” becomes the fourth bit initial scanning line, and the serial number “226” is obtained from (1920− (7 + 15 + 31 + 59)) / 8 = 226. The scanning line indicated by the serial number “212” is the initial scanning line of the fifth bit, from (1920− (7 + 15 + 31 + 59 + 119)) / 8 = 211.13. From (1920− (7 + 15 + 31 + 59 + 119 + 239)) / 8 = 181.25 as the 6th bit initial scan line, the scan line indicated by the serial number “182” is (1920− (7 + 15 + 31 + 59 + 119 + 239 + 479)) / 8 as the MSB initial scan line. = 121.38, the order is determined so that the scanning line indicated by the serial number “122” is selected.
[0052]
Further, the non-sequential scanning process will be described in detail with reference to FIG. FIG. 2 is a diagram illustrating a manner in which a scanning line is selected when the number of scanning lines of the panel 11a is 14 and the grayscale data is 4 bits.
Here, for convenience of explanation, in the present embodiment, the panel 11a has a total number of 14 scanning lines, a total number of 16 data lines, and grayscale data of 4 bits. The present device 11 will be described as a matrix display device having 14 rows × 16 columns. However, the present invention is not intended to be limited to this. The scanning lines are associated with serial numbers 0 to 13 in the order of arrangement.
[0053]
In this case, 56, which is obtained by multiplying the total number of scanning lines by four by four, is divided, but detailed description is omitted. Here, as the initial scanning line of each bit of the gradation data, the LSB is the scanning line with the serial number “0”, the first bit is the scanning line with the serial number “13”, and the second bit is the scanning line with the serial number “11”. However, the order of the MSB is determined so that the scanning line with the serial number “7” is selected. Thereafter, similarly to the above, 1 is sequentially added to the serial numbers of these initial scanning lines, thereby determining the scanning line selection order for each bit.
[0054]
Further, upon acquiring image data from an external device such as a PC, the image acquiring unit 11f stores the acquired image data in the memory 11e. When the image data is stored in one of the two storage areas of the memory 11e, the determined selection order is read out, and according to the determined selection order, first, the initial scanning line of the grayscale data corresponding to the LSB A scanning line having a serial number corresponding to each of the initial scanning line corresponding to the first bit, the initial scanning line corresponding to the second bit, and the initial scanning line corresponding to the MSB; Each pixel of the line is driven. After the selection of each scanning line, a scanning line having a serial number obtained by adding 1 to the serial number of the initial scanning line corresponding to each bit of the gradation data is selected. That is, as shown in FIG. 2, when the 0th scanning line, the 13th scanning line, the 11th scanning line, and the 7th scanning line are selected corresponding to each bit of the gradation data, In order to select the first scanning line, the zeroth scanning line, the twelfth scanning line, and the eighth scanning line, 1 is added to the serial number of the scanning line selected immediately before corresponding to each bit. Scan lines with serial numbers are sequentially selected, and each pixel is driven according to the corresponding pixel data in the image data.
[0055]
Here, when the result of adding 1 to the initial value corresponding to each bit exceeds the value (here, 13) indicating the total number of scanning lines, the addition result is set to 0. That is, when the thirteenth scanning line is selected and 1 is added to the serial number 13, the addition result is set to 0 instead of a numerical value (14) exceeding the serial number 13 of the scanning line. Therefore, in the next process, the 0th scanning line is selected.
[0056]
Further, a flow of the scanning line selection order determining process in the control unit 11d will be described with reference to FIG. FIG. 3 is a flowchart showing a scanning line selection order determination process in the control unit 11d. This processing is performed by the control unit 11d.
When the power of the electro-optical device 11 is turned on, as shown in FIG. 3, first, the process proceeds to step S300, the panel size (the number of scanning lines and the number of data lines) is obtained from the panel 11a, and the process proceeds to step S302.
[0057]
In step S302, it is determined whether or not the selection order corresponding to the acquired panel size is not stored. If it is determined that the selection order is not stored (Yes), the process proceeds to step S304; otherwise (No). Ends the processing.
When the process proceeds to step S304, the obtained number of scanning lines X is multiplied by the bit number B of the gradation data which is stored in advance, and the process proceeds to step S306.
[0058]
In step S306, the multiplication result is divided based on equation (1), and the flow advances to step S308. Here, the procedure of division is the same as that described above, and a description thereof will be omitted.
In step S308, the selection order of the initial scanning lines corresponding to each bit of the gradation data is determined based on the numerical value of the division result, and the process proceeds to step S310. Here, the procedure for determining the initial scanning line is the same as that described above, and thus the description is omitted.
[0059]
In step S310, the remaining selection order is determined based on the determined initial scanning line selection order, and the flow advances to step S312.
In step S312, the determined scanning line selection order is stored in the dedicated storage area of the memory 11e, and the process ends.
In other words, by performing the processes in steps S300 to S312, even if the size of the panel 11a is changed, the size of the panel 11a can be acquired when the power is turned on, and the appropriate scan line selection order can be determined. It is.
[0060]
Further, the flow of the image data acquisition processing in the electro-optical device 11 will be described with reference to FIG. FIG. 4 is a flowchart illustrating a process of acquiring image data in the electro-optical device 11. Here, in the present embodiment, the two storage areas of the memory 11e for storing image data are referred to as a storage area 1 and a storage area 2, respectively. As shown in FIG. 4, the process first proceeds to step S400, and determines whether or not image data has been input. If it is determined that image data has been input (Yes), the process proceeds to step S402; otherwise (No), Wait until you get it.
[0061]
When the process proceeds to step S402, it is determined whether or not the flag F1 corresponding to the storage area 1 of the memory 11e is in a set state (a state in which 1 is set in a dedicated register), and is determined to be in a set state. If yes (Yes), the process proceeds to step S404; otherwise (No), the process proceeds to step S412.
Here, in the present embodiment, when F1 is in the set state, the unprocessed image data is stored in the storage area 1 of the memory 11e, and F1 is in the clear state (0 is set in the dedicated register). In this state, the processed image data is stored in the storage area 1 of the memory 11e, nothing is stored, or the image data is being written.
[0062]
When the process proceeds to step S404, it is determined whether or not the flag F2 corresponding to the storage area 2 of the memory 11e is in a set state (a state in which 1 is set in a dedicated register), and is determined to be in a set state. If yes (Yes), the process proceeds to step S406; otherwise (No), the process proceeds to step S408.
Here, in the present embodiment, similarly to F1, when F2 is in the set state, unprocessed image data is stored in the storage area 2 of the memory 11e, and F2 is in the clear state (dedicated for exclusive use). When the register is set to 0), the processed image data is stored in the storage area 2 of the memory 11e, nothing is stored, or the image data is being written. .
[0063]
If the process proceeds to step S406, the writing of data to the memory 11e is prohibited, and the process proceeds to step S402.
That is, unprocessed image data is stored in both the storage area 1 and the storage area 2 of the memory 11e. In this case, the processing of steps S400 to S406 is repeatedly performed until one of them is processed. Will be.
[0064]
On the other hand, if the process proceeds to step S408, the input image data is stored in the storage area 2 corresponding to F2, and the process proceeds to step S410.
In step S410, the flag F2 corresponding to the storage area 2 of the memory 11e is set, and the flow shifts to step S400.
In step S402, if F1 is cleared and the process proceeds to step S412, the input image data is stored in the storage area 1 corresponding to F1, and the process proceeds to step S414.
[0065]
In step S414, the flag F1 corresponding to the storage area 1 of the memory 11e is set, and the flow shifts to step S400.
That is, when image data is input, it is determined whether or not a flag is set in the storage area of the memory 11e, and the image data is stored in the storage area where the flag is not set. Thus, even if the flag of one storage area is set, the image data can be stored if the flag of the other storage area is not set.
[0066]
Further, the flow of the image display processing by the non-sequential scanning of the image optical device 11 will be described with reference to FIG. FIG. 5 is a flowchart showing the image display processing by the non-sequential scanning of the image optical device 11.
As shown in FIG. 5, first, the process proceeds to step S500, where the control unit 11d determines whether or not the flag F1 corresponding to the storage area 1 of the memory 11e is in a set state. (Yes) moves on to step S502, otherwise (No) moves on to step S512.
[0067]
When the process proceeds to step S502, the control unit 11d reads out the scanning line selection order stored in the dedicated storage area of the memory 11e, and proceeds to step S504.
In step S504, the control unit 11d reads the corresponding pixel data in the image data from the storage area corresponding to the selected set flag in accordance with the read selection order, and shifts to step S506.
[0068]
In step S506, a scanning line is selected according to the selection order at that time, and the process proceeds to step S508.
In step S508, the control unit 11d controls the data line driving unit 11c to drive the pixel circuit of the data line corresponding to the selected scanning line according to the read pixel data, and proceeds to step S510.
[0069]
In step S510, the control unit 11d determines whether or not the image display has been completed. If it is determined that the image display has been completed (Yes), the process proceeds to step S500; otherwise (No), the process proceeds to step S504. .
In step S500, when the flag F1 is not in the set state and proceeds to step S512, the control unit 11d determines whether the flag F2 corresponding to the storage area 2 of the memory 11e is in the set state, and If it is determined that there is (Yes), the process proceeds to step S502; otherwise (No), the process proceeds to step S500.
[0070]
As described above, the control unit 11d determines the scanning line selection order in the non-sequential scanning according to the above procedure, so that the scanning line selection order according to the size of the panel 11a can be determined.
Further, by determining the selection order using the above equation (1), an accurate gradation display of an image becomes possible.
[0071]
Here, the scanning line driving unit 11b shown in FIG. 1 corresponds to the scanning line driving circuit according to the first, fifth, and ninth inventions, and the data line driving unit 11c corresponds to the first, fifth, and 9 corresponds to the data line driving circuit according to the nineteenth invention.
In the above embodiment, the selection order of the scanning lines is determined each time according to the size of the panel 11a. However, the present invention is not limited to this. In the case where the size of the panel 11a is fixed, for example, the order of selecting the scanning lines according to the size of the panel 11a may be determined in advance and fixedly prepared.
[0072]
Further, in the above embodiment, the entire size of the panel 11a is obtained, and the selection order of the scanning lines is determined according to the size. However, the present invention is not limited to this. The size (the number of scanning lines and the number of data lines) may be obtained, and the selection order of the scanning lines may be determined according to the size. Alternatively, the sizes in a plurality of predetermined regions of the panel 11a may be obtained, The selection order of the scanning lines for a plurality of predetermined regions may be determined.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an electro-optical device according to the invention.
FIG. 2 is a diagram illustrating a manner in which a scanning line is selected when the number of scanning lines of a panel 11a is 14 and gradation data is 4 bits.
FIG. 3 is a flowchart showing a scanning line selection order determining process in a control unit 11d.
FIG. 4 is a flowchart illustrating an image data acquisition process in the electro-optical device 11.
FIG. 5 is a flowchart showing an image display process by non-sequential scanning of the image optical device 11;
[Explanation of symbols]
11 electro-optical device, 11a panel, 11b scanning line driving unit, 11c data line driving unit, 11d control unit, 11e memory, 11f image data obtaining unit

Claims (12)

A pixel matrix in which pixels including optical elements are arranged in a matrix,
A plurality of scanning lines respectively connected to a pixel group arranged along one of a row direction and a column direction of the pixel matrix;
A plurality of data lines respectively connected to a pixel group arranged along the other of the row direction and the column direction of the pixel matrix,
A scanning line driving circuit for sequentially selecting the plurality of scanning lines one by one;
A data line drive circuit that outputs a control signal related to light emission of the optical element to at least one data line of the plurality of data lines;
A control unit that controls operations of the scanning line driving circuit and the data line driving circuit, and displays a predetermined image in a display area formed by the pixel matrix, the plurality of scanning lines, and the plurality of data lines. Electro-optical device,
The control unit includes:
When the total number X of the scanning lines (X is an integer) and the bit number B (B is an integer) of the gradation data indicating the light emission gradation of the optical element are obtained,
Determine appropriate M _i in the formula such that the relationship of the following formula,

A multiplication result obtained by multiplying the number of bits B of the gradation data on the total number X of said scanning line, by dividing the M _{1, M 2,} · · ·, a bit number consisting of M _B B-number set of numbers,
Generating a numerical value group obtained by dividing the multiplication result into numerical values corresponding to the ratio of the B number of ²ⁿ values (n = 0, 1, 2,..., (B-1));
Further, a serial number is associated with each of the scanning lines in advance according to the arrangement order,
A predetermined number among the serial numbers of the scanning lines is determined as an initial value corresponding to the least significant bit (0th digit) of a bit string constituting the gradation data;
Subtracting the smallest numerical value among the divided numerical value groups from the multiplication result, and adding a numerical value of a division result obtained by dividing the subtraction result by the bit number B and an initial value associated with the least significant bit; and When the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is the next to the least significant bit of the bit string forming the gradation data. Determined as the initial value corresponding to the bit (first digit),
For the other bits of the gradation data, in order from the bit of the smaller digit of the other bits, among the numerical values of the divided numerical value group, select the numerically smallest value corresponding to the bit digit number of the bit, From the multiplication result, subtract the total value from the smallest numerical value to the selected numerical value in the divided numerical value group, and divide the subtraction result by the bit number B to obtain a numerical value of a division result and the least significant bit. The initial value associated with the bit is added, and when the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is associated with the bit. Determined as a value,
First, a scanning line having a serial number indicated by an initial value corresponding to the least significant bit is selected, and then a serial number indicated by the initial value corresponding to each bit sequentially shifted from the least significant bit to the most significant bit. A first process of determining a selection order so that each of the scan lines is sequentially selected;
1 is added to the value associated with each bit of the gradation data, and the value corresponding to each bit of the gradation data after the addition exceeds a value obtained by subtracting 1 from the total number of the scanning lines. A second process for updating the value to the minimum value of the serial number, and a scanning line corresponding to a value associated with each bit of the gradation data after the second process. And a third processing for determining the selection order so as to select in the same order as the processing of
The selection order of the scanning lines is determined by repeatedly performing the second processing and the third processing by a value obtained by subtracting 1 from the total number of the scanning lines for each bit of the bit string constituting the gradation data. An electro-optical device, wherein the scanning line driving circuit selects the scanning line based on the determined selection order. When the number of bits B is 4, M _i (i = 1 to 4) is calculated as M ₁ = (1/15) X ± (1/60) X and M ₂ = (2/15) X ± ( 1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X The electro-optical device according to claim 1, wherein When the number of bits B is 6, M _i (i = 1 to 6) is calculated as M ₁ = (1/60) X ± (1/240) X and M ₂ = (1/32) X ± ( 1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± 3. The electricity according to claim 1, wherein the numerical value group is generated by determining from (1/80) X and M ₆ = (61/120) X ± (1/48) X. 4. Optical device. When the number of bits B is 8, M _i (i = 1 to 8) is calculated as M ₁ = (1/240) X ± (1/480) X and M ₂ = (7/960) X ± ( 1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (１ ／) X ± (1/96) X, M ₇ = (１ ／) X ± (7/480) X and M ₈ = (241/480) X The electro-optical device according to claim 1, wherein the numerical value group is generated by determining from ± (1/48). A pixel matrix in which pixels including optical elements are arranged in a matrix,
A plurality of scanning lines respectively connected to a pixel group arranged along one of a row direction and a column direction of the pixel matrix;
A plurality of data lines respectively connected to a pixel group arranged along the other of the row direction and the column direction of the pixel matrix,
A scanning line driving circuit for sequentially selecting the plurality of scanning lines one by one;
A data line drive circuit that outputs a control signal related to light emission of the optical element to at least one data line of the plurality of data lines;
A control unit that controls operations of the scanning line driving circuit and the data line driving circuit, and displays a predetermined image in a display area formed by the pixel matrix, the plurality of scanning lines, and the plurality of data lines. In the electro-optical device, a program for determining the selection order of the scanning line,
When the total number X of the scanning lines (X is an integer) and the bit number B (B is an integer) of the gradation data indicating the light emission gradation of the optical element are obtained,
Determine appropriate M _i in the formula such that the relationship of the following formula,

A multiplication result obtained by multiplying the number of bits B of the gradation data on the total number X of said scanning line, by dividing the M _{1, M 2,} · · ·, a bit number consisting of M _B B-number set of numbers,
Generating a numerical value group obtained by dividing the multiplication result into numerical values corresponding to the ratio of the B number of ²ⁿ values (n = 0, 1, 2,..., (B-1));
Further, a serial number is associated with each of the scanning lines in advance according to the arrangement order,
A predetermined number among the serial numbers of the scanning lines is determined as an initial value corresponding to the least significant bit (0th digit) of a bit string constituting the gradation data;
Subtracting the smallest numerical value among the divided numerical value groups from the multiplication result, and adding a numerical value of a division result obtained by dividing the subtraction result by the bit number B and an initial value associated with the least significant bit; and When the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is the next to the least significant bit of the bit string forming the gradation data. Determined as the initial value corresponding to the bit (first digit),
For the other bits of the gradation data, in order from the bit of the smaller digit of the other bits, among the numerical values of the divided numerical value group, select the numerically smallest value corresponding to the bit digit number of the bit, From the multiplication result, subtract the total value from the smallest numerical value to the selected numerical value in the divided numerical value group, and divide the subtraction result by the bit number B to obtain a numerical value of a division result and the least significant bit. The initial value associated with the bit is added, and when the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is associated with the bit. Determined as a value,
First, a scanning line having a serial number indicated by an initial value corresponding to the least significant bit is selected, and then a serial number indicated by the initial value corresponding to each bit sequentially shifted from the least significant bit to the most significant bit. A first process of determining a selection order so that each of the scan lines is sequentially selected;
1 is added to the value associated with each bit of the gradation data, and the value corresponding to each bit of the gradation data after the addition exceeds a value obtained by subtracting 1 from the total number of the scanning lines. A second process for updating the value to the minimum value of the serial number, and a scanning line corresponding to a value associated with each bit of the gradation data after the second process. And a third process of determining the selection order so as to select in the same order as the process of
The selection order of the scanning lines is determined by repeatedly performing the second processing and the third processing by a value obtained by subtracting 1 from the total number of the scanning lines for each bit of the bit string constituting the gradation data. A scanning line selection order determining program. When the number of bits B is 4, M _i (i = 1 to 4) is calculated as M ₁ = (1/15) X ± (1/60) X and M ₂ = (2/15) X ± ( 1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X 6. The scanning line selection order determining program according to claim 5, wherein: When the number of bits B is 6, M _i (i = 1 to 6) is calculated as M ₁ = (1/60) X ± (1/240) X and M ₂ = (1/32) X ± ( 1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± The scanning line according to claim 5, wherein the numerical value group is generated by determining from (1/80) X and M ₆ = (61/120) X ± (1/48) X. Selection order determination program. When the number of bits B is 8, M _i (i = 1 to 8) is calculated as M ₁ = (1/240) X ± (1/480) X and M ₂ = (7/960) X ± ( 1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (１ ／) X ± (1/96) X, M ₇ = (１ ／) X ± (7/480) X and M ₈ = (241/480) X The scanning line selection order determination program according to any one of claims 5 to 7, wherein the numerical value group is generated by determining from ± (1/48). A pixel matrix in which pixels including optical elements are arranged in a matrix,
A plurality of scanning lines respectively connected to a pixel group arranged along one of a row direction and a column direction of the pixel matrix;
A plurality of data lines respectively connected to a pixel group arranged along the other of the row direction and the column direction of the pixel matrix,
A scanning line driving circuit for sequentially selecting the plurality of scanning lines one by one;
A data line drive circuit that outputs a control signal related to light emission of the optical element to at least one data line of the plurality of data lines;
A control unit that controls operations of the scanning line driving circuit and the data line driving circuit, and displays a predetermined image in a display area formed by the pixel matrix, the plurality of scanning lines, and the plurality of data lines. In the electro-optical device, a method for determining the selection order of the scanning line,
Acquiring a total number X of the scanning lines (X is an integer) and a bit number B (B is an integer) of gradation data indicating a light emission gradation of the optical element;
Determine appropriate M _i in the formula such that the relationship of the following formula,

A multiplication result obtained by multiplying the number of bits B of the gradation data on the total number X of said scanning line, by dividing the M _{1, M 2,} · · ·, a bit number consisting of M _B B-number set of numbers,
Generating a numerical value group obtained by dividing the multiplication result into numerical values corresponding to the ratio of the B number of ²ⁿ values (n = 0, 1, 2,..., (B-1));
Further, a serial number is associated with each of the scanning lines in advance according to the arrangement order,
A predetermined number among the serial numbers of the scanning lines is determined as an initial value corresponding to the least significant bit (0th digit) of a bit string constituting the gradation data;
Subtracting the smallest numerical value among the divided numerical value groups from the multiplication result, and adding a numerical value of a division result obtained by dividing the subtraction result by the bit number B and an initial value associated with the least significant bit; and When the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is the next to the least significant bit of the bit string forming the gradation data. Determined as the initial value corresponding to the bit (first digit),
For the other bits of the gradation data, in order from the bit of the smaller digit of the other bits, among the numerical values of the divided numerical value group, select the numerically smallest value corresponding to the bit digit number of the bit, From the multiplication result, subtract the total value from the smallest numerical value to the selected numerical value in the divided numerical value group, and divide the subtraction result by the bit number B to obtain a numerical value of a division result and the least significant bit. The initial value associated with the bit is added, and when the numerical value of the addition result is not an integer, the decimal part of the numerical value of the addition result is rounded up, and the serial number corresponding to the numerical value of the addition result is associated with the bit. Determined as a value,
First, a scanning line having a serial number indicated by an initial value corresponding to the least significant bit is selected, and then a serial number indicated by the initial value corresponding to each bit sequentially shifted from the least significant bit to the most significant bit. Performing a first process of determining a selection order so as to sequentially select the scanning lines of
1 is added to the value associated with each bit of the gradation data, and the value corresponding to each bit of the gradation data after the addition exceeds a value obtained by subtracting 1 from the total number of the scanning lines. A second process of updating the value to the minimum value of the serial number when
A third process of determining a selection order so as to select a scanning line corresponding to a value associated with each bit of the gradation data after the second process in the same order as the first process; , Is repeatedly performed for each bit of the bit string constituting the gradation data by a value obtained by subtracting 1 from the total number of the scanning lines, thereby determining the selection order of the scanning lines. Method. When the number of bits B is 4, M _i (i = 1 to 4) is calculated as M ₁ = (1/15) X ± (1/60) X and M ₂ = (2/15) X ± ( 1/40) X, M ₃ = (4/15) X ± (1/30) X and M ₄ = (8/15) X ± (1/20) X 10. The scanning line selection order determining method according to claim 9, wherein: When the number of bits B is 6, M _i (i = 1 to 6) is calculated as M ₁ = (1/60) X ± (1/240) X and M ₂ = (1/32) X ± ( 1/160) X, M ₃ = (1/16) X ± (1/120) X, M ₄ = (61/480) X ± (1/80) X, M ₅ = (61/240) X ± (1/80) X and _{M 6 = (61/120) X ±} (1/48) to determine from the X, scan of claim 9 or claim 10, wherein the generating the set of numbers Line selection order determination method. When the number of bits B is 8, M _i (i = 1 to 8) is calculated as M ₁ = (1/240) X ± (1/480) X and M ₂ = (7/960) X ± ( 1/320) X, M ₃ = (7/480) X ± (1/240) X, M ₄ = (1/32) X ± (1/160) X, M ₅ = (1/16) X ± (1/120) X, M ₆ = (１ ／) X ± (1/96) X, M ₇ = (１ ／) X ± (7/480) X and M ₈ = (241/480) X The scanning line selection order determination method according to claim 9, wherein the numerical value group is generated by determining from ± (1/48).

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