JP5619711B2 - カラーディスプレイ用の装置、システム、および方法 - Google Patents
カラーディスプレイ用の装置、システム、および方法 Download PDFInfo
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Description
子のアレイを含むLCD装置が記載されている。このフィルタアレイは、3原色サブピクセルフィルタ、例えばRGBカラーフィルタを含み、この3原色サブピクセルフィルタが、第4のタイプのカラーフィルタとインターレースされて所定の反復的シーケンスが形成される。’375特許に記載される様々な反復的ピクセル構成、例えば反復的16ピクセルシーケンスは、ピクセル構成を単純化し、かつ一定のイメージパターン、例えばより対称的なラインパターンを再現するディスプレイ装置の能力を改善することを意図している。ピクセルの幾何学的構成を制御する以外は、’375には、反復的シーケンス中の3原色および第4の色の間のどんな視覚的干渉も記載または提案されていない。
きない。4つ以上の原色を用いるディスプレイ装置を使用することにより、ディスプレイの再現可能な色域は拡張される。加えて、または別法として、ディスプレイによって生成される輝度レベルを著しく向上させることができる。本発明の諸実施形態は、4つ以上の原色を使用して、ディスプレイ装置、例えば液晶ディスプレイ(LCD)装置などのシンプロファイル(thin profile)ディスプレイ装置上にカラーイメージを表示するシステムおよび方法を提供する。
の3つのシーケンスを含むほぼ矩形の構成を含む。
て再現される。本発明のこの態様のその他の実施形態では、イメージ入力は、複数の白黒ピクセルを含む白黒イメージデータを表す白黒イメージ入力を含む。原色のこの少なくとも第1組および第2組は、3つの相補的な原色の第1組および第2組を含むことができ、n原色イメージの各白黒ピクセルは、原色の第1組または第2組のどちらかで生成することができる。あるいは、原色のこの少なくとも第1組および第2組は、相補的な原色の第1対、第2対、および第3対を含み、n原色イメージの各白黒ピクセルは、原色の第1対、第2対、および第3対のうちの1つで生成される。
本発明のさらに別の態様の諸実施形態によれば、n原色イメージを表示するシステムであって、nが6以上であり、少なくとも原色の第1組および原色の第2組を含む少なくとも6つの相異なる原色のそれぞれのカラーサブピクセル素子を含む、少なくとも6つの相異なる原色のそれぞれの少なくとも1つのカラーサブピクセル素子を含む周期的に反復する配列として構成されたカラーサブピクセル素子のアレイを有するn原色ディスプレイ装置と、原色の第1組のそれぞれの1つのサブピクセルをそれぞれ含む複数のピクセルを含むイメージデータを表すイメージ入力を受け取るイメージコレクタと、カラー・イメージ・データを、ピクセルの第1グループを含む第1イメージ成分と、ピクセルの第2グループを含む第2イメージ成分に分離するための手段であって、第1グループ中の各ピクセルが第2グループ中のピクセルにそれぞれほぼ隣接する手段と、第2グループ中のピクセルを、原色の第2組のそれぞれの1つのサブピクセルをそれぞれ含む対応する変換済みピクセルに変換するための手段と、第2グループ中の変換済みカラーピクセルのそれぞれと、第1グループ中のほぼ隣接するピクセルのそれぞれとに対応するデータを表すn原色入力信号を生成するための手段とを含むシステムが提供される。
る。3原色ディスプレイでは、最初の2つのパラメータ、すなわち光源のスペクトルとLCセルのスペクトラルトランスミッションは、通常はシステムの制約によって指示され、したがって、フィルタに対するカラーを選択して、直接的に、図1Aに示す所望のRGB三角形の「コーナ」で、必要な表色値を提供することができる。3原色LCD装置の効率を最大にするため、フィルタのスペクトラルトランスミッションは、可能な範囲で光源の波長ピークとほぼ重なるように設計される。3原色LCD装置でのフィルタの選択は、主に全輝度効率を最大にすることに基づくことができる。この状況では、より狭いスペクトラルトランスミッション曲線を有するフィルタを選択することにより、より彩度の高い原色が得られ、一般にディスプレイの全輝度レベルが低下することに留意されたい。
全ディスプレイ輝度の最適な組合せを達成することができる。
同様に、本発明の一実施形態による5色LCD装置の正規化輝度レベルは以下のように計算することができる。
上式で、Y(colori)はi番目の原色の輝度レベルを表し、Y(n−color
s)はn原色ディスプレイの正規化全輝度レベルを表す。
図7Aに、本発明の諸実施形態による6原色ディスプレイのフィルタ透過曲線の略図を示す。6つの原色は、赤、緑、青、シアン、マゼンタ(M)、および黄であり、RGBCMYと総称する。図7Bに、図7Aのフィルタ設計によって得られる色域の略図を示す。図7Aおよび図7Bのフィルタ設計は、各ピクセルにマゼンタ(M)フィルタサブピクセルが追加されることを除いて、図5Aおよび図5Bのフィルタ設計と概して同じである。この例示的6原色ディスプレイについての白色点座標はx=0.319およびy=0.321であり、輝度利得は1に等しい。
ピクセルを以下に述べるような効率的な構成として構成することによって、従来のサブピクセルアスペクト比1:3を維持することができる。そのような構成は、1:1に可能な限り近いアスペクト比を有することができ、その構成は、標準的なRGBディスプレイで使用されるLCアレイの対応するセルによって照明することができる3つ以上のサブピクセルフィルタの周期的パターンを含むことができ、新しいタイプのディスプレイ、例えば新しいTFTアクティブマトリックス設計を設計する必要がなくなる。基本ディスプレイ構成要素の再設計、特に新しいタイプのTFTアクティブマトリックスの設計は非常に複雑かつ高価であるので、本発明の特徴を既存のディスプレイ設計に統合するというオプションは、本発明の諸実施形態の際立った利点である。
スーパーピクセル構造の長さはNL×Lであり、これはm/3に等しく、スーパーピクセルの幅はNW×Wであり、これはkに等しい。ただし、LおよびWはそれぞれ、3セルピクセル単位で測定したn原色ピクセルの平均長さおよび平均幅である。したがって、n原色ピクセルの平均アスペクト比は、以下の式で与えられる。
上記の要件を満たす最小のスーパーピクセル構造を求めるために、各スーパーピクセル内の縦方向または横方向のn原色ピクセルの数を値1、例えばNL=1に設定し、それに
よって多原色ピクセルのアスペクト比がm2/3nによって与えられる。したがって、最
小のスーパーピクセル構造は、mの値に対して、m2を3nで割った値を可能な限り1に
近づけることによって得られる。
Claims (5)
- 少なくとも4つの相異なる色を使用してカラーイメージを表示する透過型カラー液晶ディスプレイ(LCD)装置であって、
液晶(LC)素子のアレイと、
前記カラーイメージに対応する入力を受け取り、前記LC素子のアレイのLC素子を選択的に動作状態にし、前記カラーイメージのグレイレベル表現に対応する減衰パターンを生成するように適合された駆動回路と、
多色光を発生するバック照明源と、
該バック照明源によって発生された該多色光をフィルタするカラーサブピクセル・フィルタ素子のアレイであって、各カラーサブピクセル・フィルタ素子が前記LC素子の1つと位置合せされるように、該カラーサブピクセル・フィルタのアレイが前記LC素子のアレイと並べられ、位置合せされている、前記カラーサブピクセル・フィルタ素子のアレイと、
を備え、
前記カラーサブピクセル・フィルタ素子のアレイは、少なくとも4つの色の光をそれぞれ透過する、少なくとも4つのタイプのカラーサブピクセル・フィルタ素子を含み、前記少なくとも4つのタイプのカラーサブピクセル・フィルタ素子が選択的に用いられて光を生成し、
前記4つ又はそれより多い色を使用して、該カラーイメージの少なくともいくつかのピクセルが再生され、
各サブピクセルが約1:3のアスペクト比を有し、複数のサブピクセルが、前記少なくとも4つの色の各々についての少なくとも1つのサブピクセルを含むスーパーピクセル構造に配置され、該カラーサブピクセル・フィルタ素子の複数のスーパーピクセル構造のアスペクト比が可能な限り1:1に近づくように前記スーパーピクセル構造内のサブピクセルの配置が設定されている、装置。 - 前記カラー液晶ディスプレイ(LCD)装置は、5色を使用してカラーイメージを表示する、請求項1に記載の装置。
- 前記5色が、赤、緑、青、黄色およびシアンである、請求項2に記載の装置。
- 異なるn原色の各々のカラーサブピクセル・フィルタ素子を含む矩形のカラーサブピクセル・フィルタ素子のアレイを備え、前記n原色のカラーサブピクセル・フィルタ素子により形成されるピクセルの形状は、正方形ではない、請求項1に記載の装置。
- 前記カラーサブピクセル・フィルタ素子がn原色ピクセル内に配列され、前記n原色ピクセルの各々は、n個の異なるカラーサブピクセル・フィルタ素子を含み、前記n原色ピクセルの各々は、1:1の平均アスペクト比を有する、請求項4に記載の装置。
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