JP2020191634A - 表示装置のストレス補償の方法およびシステム - Google Patents
表示装置のストレス補償の方法およびシステム Download PDFInfo
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- H—ELECTRICITY
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- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
110:表示パネル
115:処理回路
120,205:メモリ
200,201,202:ストレス補償システム
210:補償モジュール
215:輝度/ストレス捕捉モジュール
220:加算回路
222:チャンネルエンコーダ
225:メモリコントローラ
230,240:解凍器
232,242:チャンネルデコーダ
234:トランケータ
235:圧縮器
Claims (20)
- 加算回路によって、表示装置が表示する映像の輝度を蓄積して蓄積輝度値を生成すること、
エンコーダによって、蓄積輝度値を符号化して前記蓄積輝度値の保護部分を保存すること、
圧縮器によって、前記蓄積輝度値を圧縮して圧縮蓄積輝度値を生成すること、
前記圧縮器によって、前記圧縮蓄積輝度値をメモリに格納すること、
解凍器によって、前記圧縮蓄積輝度値を読み出して解凍して解凍値を生成すること、および
デコーダによって、前記保護部分に基づいて前記解凍値を復号化し、前記蓄積輝度値に対応して、前記解凍値よりも低い圧縮ノイズを有する復号値を生成することを含む、表示装置のストレス補償方法。 - 前記保護部分は、前記蓄積輝度値のp番目のビットで始まるk個のビットを含み、
前記pとkは、いずれも1より大きい整数であり、
(p+k−1)は、前記蓄積輝度値のビット長より小さい、請求項1に記載のストレス補償方法。 - 前記解凍値の圧縮ノイズは、前記解凍値の前記(p+k−1)番目のビット内に完全に含まれる、請求項2に記載のストレス補償方法。
- トランケータによって、前記保護部分に先行する前記復号値の下位ビットを破棄することをさらに含む、請求項2に記載のストレス補償方法。
- 前記復号値を補償器に提供して、前記表示装置のストレスに対して入力映像を補償することをさらに含む、請求項2に記載のストレス補償方法。
- 前記蓄積輝度値を符号化して前記蓄積輝度値の保護部分を保存することは、
前記エンコーダによって、前記蓄積輝度値の前記保護部分を識別すること、および
前記エンコーダによって、前記保護部分を前記メモリに格納することを含む、請求項1に記載のストレス補償方法。 - 前記保護部分は、前記メモリに非圧縮状態で格納される、請求項6に記載のストレス補償方法。
- 前記解凍値を復号化して前記復号値を生成することは、
前記デコーダによって、前記解凍値の解凍された保護部分を識別すること、
前記デコーダによって、前記保護部分と前記解凍された保護部分との間の差を計算して推定圧縮ノイズを生成すること、および
前記デコーダによって、前記解凍値と前記推定圧縮ノイズに基づいて前記復号値を計算して前記解凍値の圧縮ノイズを低減することを含む、請求項1に記載のストレス補償方法。 - 前記解凍値の前記解凍された保護部分は、前記蓄積輝度値の前記保護部分のビット位置に対応する、請求項8に記載のストレス補償方法。
- 前記保護部分と前記解凍された保護部分との間の差を計算して推定圧縮ノイズを生成することは、
前記デコーダによって、第1エラー(E1)および第2エラー(E2)を次のように計算すること
-
-
- 前記復号値を計算して前記解凍値の圧縮ノイズを低減することは、
前記デコーダによって、前記第1エラーが前記第2エラーと同一であると判断すること、および
前記デコーダによって、前記解凍値を前記復号値として決定することを含む、請求項10に記載のストレス補償方法。 - 前記蓄積輝度値を符号化して前記蓄積輝度値の保護部分を保存することは、前記エンコーダによって、前記保護部分を複数回複製してバイナリ複製ストリングを形成することを含み、
前記ストレス補償方法は、
前記圧縮器によって、前記バイナリ複製ストリングを圧縮すること、
前記圧縮器によって、前記圧縮されたバイナリ複製ストリングを前記メモリに格納すること、および
前記解凍器によって、前記圧縮されたバイナリ複製ストリングを読み出して解凍して、解凍されたバイナリ複製ストリングを生成することをさらに含む、請求項1に記載のストレス補償方法。 - 前記解凍値を復号化して前記復号値を生成することは、
前記デコーダによって、前記解凍されたバイナリ複製ストリングに最尤復号のプロセスを適用して復号化された保護部分を計算して前記保護部分を推定すること、
前記デコーダによって、前記復号化された保護部分と前記解凍値の解凍された保護部分との間の差を計算して推定圧縮ノイズを生成すること、および
前記デコーダによって、前記解凍値と前記推定圧縮ノイズに基づいて前記復号値を計算して前記解凍値における圧縮ノイズを低減することを含む、請求項14に記載のストレス補償方法。 - 前記蓄積輝度値を符号化して前記蓄積輝度値の保護部分を保存することは、前記エンコーダによって、前記保護部分を符号化して複数のパリティビットを生成することを含み、
前記蓄積輝度値を圧縮することは、前記圧縮器によって、前記パリティビットを前記蓄積輝度値と共に圧縮することを含み、
前記圧縮蓄積輝度値を解凍して前記解凍値を生成することは、前記解凍器によって、前記圧縮されたパリティビットを前記圧縮蓄積輝度値と共に解凍して解凍された保護部分と解凍されたパリティビットを生成することを含む、請求項1に記載のストレス補償方法。 - 前記保護部分の符号化は、前記蓄積輝度値のスライスに適用されたリードソロモン符号に従い、
前記パリティビットは前記蓄積輝度値と異なる圧縮により圧縮される、請求項16に記載のストレス補償方法。 - 前記解凍値を復号化して前記復号値を生成することは、
前記デコーダによって、復号化された保護部分を計算し、前記解凍された保護部分および前記解凍されたパリティビットに基づいて前記保護部分を推定すること、
前記デコーダによって、前記復号化された保護部分と前記解凍された保護部分の差を計算して推定圧縮ノイズを生成すること、および
前記デコーダによって、前記解凍値および前記圧縮推定ノイズに基づいて前記復号値を計算して前記解凍値における圧縮ノイズを低減することを含む、請求項16に記載のストレス補償方法。 - 加算回路によって、表示装置が表示する出力映像の輝度値を蓄積して蓄積輝度値を生成すること、
エンコーダによって、前記蓄積輝度値を符号化して前記蓄積輝度値の保護部分を保存すること、
圧縮器によって、前記蓄積輝度値を圧縮して圧縮蓄積輝度値を生成すること、
前記圧縮器によって、前記圧縮蓄積輝度値をメモリに格納すること、
解凍器によって、前記圧縮蓄積輝度値を読み出して解凍して解凍値を生成すること、
デコーダによって、前記保護部分に基づいて前記解凍値を復号化し、前記蓄積輝度値に対応して、前記解凍値より低い圧縮ノイズを有する復号値を生成すること、
前記加算回路によって、前記表示装置に表示される前記出力映像を受信すること、および
前記加算回路によって、前記出力映像輝度値に前記復号値を加えて更新された蓄積輝度値を生成すること
を含む、表示装置のストレス補償方法。 - メモリ、および
処理回路を含み、
前記処理回路は、
表示装置が表示する映像の輝度値を蓄積して蓄積輝度値を生成し、
前記蓄積輝度値を符号化して前記蓄積輝度値の保護部分を保存し、
前記蓄積輝度値を圧縮して圧縮蓄積輝度値を生成し、
前記圧縮蓄積輝度値をメモリに格納し、
前記圧縮蓄積輝度値を読み出して解凍して解凍値を生成し、
前記保護部分に基づいて前記解凍値を復号化し、前記蓄積輝度値に対応して、前記解凍値より低い圧縮ノイズを有する復号値を生成する、表示装置のストレス補償システム。
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