JP6817789B2 - 表示ドライバ及び半導体装置 - Google Patents
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- JP6817789B2 JP6817789B2 JP2016219527A JP2016219527A JP6817789B2 JP 6817789 B2 JP6817789 B2 JP 6817789B2 JP 2016219527 A JP2016219527 A JP 2016219527A JP 2016219527 A JP2016219527 A JP 2016219527A JP 6817789 B2 JP6817789 B2 JP 6817789B2
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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Description
基準階調電圧生成回路32は、設定電圧VG1〜VG3に基づき、互いに電圧値が異なる256階調分の正極性の基準階調電圧Y1〜Y256を生成し、夫々をDA変換回路34に供給する。
基準階調電圧生成回路33は、設定電圧VG3〜VG5に基づき、互いに電圧値が異なる256階調分の負極性の基準階調電圧X1〜X256を生成し、夫々をDA変換回路35に供給する。
駆動制御部11A、走査ドライバ12A及びデータドライバ13Aと、表示デバイス20Aとを含む。
図5に示すラダー抵抗における各出力タップのうちから、そのγ補正値に対応した変換が為される複数(例えば5つ)の出力タップを指定する情報を表す。
データ走査期間Tvの周期にて、電圧Vpを有する走査パルスDSPを、表示デバイス20AのデータラインD1〜Dnの各々に順次択一的に供給する。
これをγレジスタ24に供給する。これにより、γレジスタ22は、当該γ補正データPGRを保持しつつこれを、図9に示すようにγ補正データSPとして基準階調電圧生成回路32のγ特性調整回路SXに供給する。また、γレジスタ24は、γ補正データNGRを保持しつつこれを、図9に示すようにγ補正データSNとして基準階調電圧生成回路33のγ特性調整回路SXに供給する。
12、12A 走査ドライバ
13、13A データドライバ
20、20A 表示デバイス
21、23、41、51 γ補正データ抽出回路
22、24、42〜44、52〜54 γレジスタ
32、33 基準階調電圧生成回路
34、35 DA変換回路
45、55 セレクタ
130 γ補正データ送出部
132 階調電圧変換部
Claims (14)
- 複数の表示セルを有する表示デバイスに、映像信号にて示される前記表示セル毎の輝度レベルに対応した階調電圧を供給する表示ドライバであって、
ガンマ補正値を表す複数のガンマ補正データ片を所定期間毎に1つずつ送出するガンマ補正データ送出部と、
前記ガンマ補正データ送出部から送出された前記ガンマ補正データ片にて表される前記ガンマ補正値に基づくガンマ特性にて、前記輝度レベルを前記階調電圧に変換する階調電圧変換部と、を有し、
前記ガンマ補正データ送出部は、
前記映像信号にて示される前記表示セル毎の前記輝度レベルを表す表示データ片の系列が水平走査期間毎に区分けして配列されていると共に、前記複数のガンマ補正データ片が各垂直走査期間の先頭部に配列されている画像データ信号を生成する制御部と、
前記画像データ信号中から垂直走査期間毎に前記複数のガンマ補正データ片を抽出するガンマ補正データ抽出部と、
前記ガンマ補正データ抽出部で抽出された前記複数のガンマ補正データ片を夫々個別に保持する複数のガンマレジスタと、
前記複数のガンマレジスタの各々に保持されている前記ガンマ補正データ片を水平走査期間毎に1つずつ順に選択し、選択した前記ガンマ補正データ片を前記階調電圧変換部に送出するセレクタと、を含むことを特徴とする表示ドライバ。 - 前記所定期間は、前記映像信号における水平走査期間であることを特徴とする請求項1に記載の表示ドライバ。
- 前記複数のガンマ補正データ片は、赤色成分に対するガンマ補正値を表す第1のガンマ補正データ片と、緑色成分に対するガンマ補正値を表す第2のガンマ補正データ片と、青色成分に対するガンマ補正値を表す第3のガンマ補正データ片と、からなることを特徴とする請求項1又は2に記載の表示ドライバ。
- 前記表示デバイスには、赤色表示を行う複数の前記表示セルが並置されている水平表示ラインと、緑色表示を行う複数の前記表示セルが並置されている水平表示ラインと、青色表示を行う複数の前記表示セルが並置されている水平表示ラインと、が周期的に配置されていることを特徴とする請求項1〜3のいずれか1に記載の表示ドライバ。
- 前記ガンマ補正データ送出部は、
前記映像信号にて示される前記表示セル毎の前記輝度レベルを表す表示データ片の系列が水平走査期間毎に区分けして配列されていると共に、前記複数のガンマ補正データ片が1つずつ水平走査期間毎に配列されている画像データ信号を生成する制御部と、
前記画像データ信号中から水平走査期間毎に前記ガンマ補正データ片を順に抽出するガンマ補正データ抽出部と、
前記ガンマ補正データ抽出部で抽出された前記ガンマ補正データ片を保持しつつ前記階調電圧変換部に送出するガンマレジスタと、を含むことを特徴とする請求項1〜4のいずれか1に記載の表示ドライバ。 - 前記画像データ信号に含まれる前記表示データ片の系列を水平走査期間毎に取り込んで複数の表示データ片を取得するデータ取込部を含み、
前記階調電圧変換部は、前記ガンマレジスタから送出された前記ガンマ補正データ片にて表される前記ガンマ補正値に基づくガンマ特性にて、前記複数の表示データ片各々が示す前記輝度レベルを前記階調電圧に変換することを特徴とする請求項5に記載の表示ドライバ。 - 前記画像データ信号に含まれる前記表示データ片の系列を水平走査期間毎に取り込んで複数の表示データ片を取得するデータ取込部を含み、
前記階調電圧変換部は、前記セレクタから送出された前記ガンマ補正データ片にて表される前記ガンマ補正値に基づくガンマ特性にて、前記複数の表示データ片各々が示す前記輝度レベルを前記階調電圧に変換することを特徴とする請求項1〜4のいずれか1に記載の表示ドライバ。 - 複数の表示セルを有する表示デバイスに、映像信号にて示される前記表示セル毎の輝度レベルに対応した階調電圧を供給する表示ドライバが形成されている半導体装置であって、
前記表示ドライバは、
ガンマ補正値を表す複数のガンマ補正データ片を所定期間毎に1つずつ送出するガンマ補正データ送出部と、
前記ガンマ補正データ送出部から送出された前記ガンマ補正データ片にて表される前記ガンマ補正値に基づくガンマ特性にて、前記輝度レベルを前記階調電圧に変換する階調電圧変換部と、を有し、
前記ガンマ補正データ送出部は、
前記映像信号にて示される前記表示セル毎の前記輝度レベルを表す表示データ片の系列が水平走査期間毎に区分けして配列されていると共に、前記複数のガンマ補正データ片が各垂直走査期間の先頭部に配列されている画像データ信号を生成する制御部と、
前記画像データ信号中から垂直走査期間毎に前記複数のガンマ補正データ片を抽出するガンマ補正データ抽出部と、
前記ガンマ補正データ抽出部で抽出された前記複数のガンマ補正データ片を夫々個別に保持する複数のガンマレジスタと、
前記複数のガンマレジスタの各々に保持されている前記ガンマ補正データ片を水平走査期間毎に1つずつ順に選択し、選択した前記ガンマ補正データ片を前記階調電圧変換部に送出するセレクタと、を含むことを特徴とする半導体装置。 - 前記表示デバイスは、夫々が画面の水平方向に伸張する第1〜第m(mは2以上の整数)の水平表示ラインと、夫々が画面の垂直方向に伸張しており前記第1〜第mの水平表示ラインと交叉する第1〜第n(nは2以上の整数)のデータラインと、を含み、前記第1〜第mの水平表示ラインと前記第1〜第nのデータラインとの各交叉部に前記表示セルが形成されており、
前記表示ドライバは、
前記第1〜第nのデータラインの各々に順次、択一的に走査パルスを供給する走査ドライバと、
前記階調電圧変換部を含み、前記第1〜第nのデータラインの各々に形成されているm個の前記表示セルに夫々対応した第1〜第mの前記階調電圧を前記走査パルスに同期したタイミングで前記第1〜第mの水平表示ラインに供給するデータドライバと、を含むことを特徴とする請求項1に記載の表示ドライバ。 - 前記第1〜第nのデータラインの各々には、互いに同一の色表示を行うm個の前記表示セルが形成されていることを特徴とする請求項9に記載の表示ドライバ。
- 前記ガンマ補正データ送出部は、
前記映像信号にて示される前記表示セル毎の輝度レベルを表す表示データ片がm個ずつ、前記所定期間毎に配列されていると共に、前記複数のガンマ補正データ片が1つずつ前記所定期間毎に配列されている画像データ信号を生成する制御部と、
前記画像データ信号中から前記所定期間毎に前記ガンマ補正データ片を順に抽出するガンマ補正データ抽出部と、
前記ガンマ補正データ抽出部で抽出された前記ガンマ補正データ片を保持しつつ前記階調電圧変換部に送出するガンマレジスタと、を含むことを特徴とする請求項10に記載の表示ドライバ。 - 前記表示デバイスは、夫々が画面の水平方向に伸張する第1〜第m(mは2以上の整数)の水平表示ラインと、夫々が画面の垂直方向に伸張しており前記第1〜第mの水平表示ラインと交叉する第1〜第n(nは2以上の整数)のデータラインと、を含み、前記第1〜第mの水平表示ラインと前記第1〜第nのデータラインとの各交叉部に前記表示セルが形成されており、
前記表示ドライバは、
前記第1〜第nのデータラインの各々に順次、択一的に走査パルスを供給する走査ドライバと、
前記階調電圧変換部を含み、前記第1〜第nのデータラインの各々に形成されているm個の前記表示セルに夫々対応した第1〜第mの前記階調電圧を前記走査パルスに同期したタイミングで前記第1〜第mの水平表示ラインに供給するデータドライバと、を含む
ことを特徴とする請求項8に記載の半導体装置。 - 前記第1〜第nのデータラインの各々には、互いに同一の色表示を行うm個の前記表示セルが形成されていることを特徴とする請求項12に記載の半導体装置。
- 前記ガンマ補正データ送出部は、
前記映像信号にて示される前記表示セル毎の輝度レベルを表す表示データ片がm個ずつ、前記所定期間毎に配列されていると共に、前記複数のガンマ補正データ片が1つずつ前記所定期間毎に配列されている画像データ信号を生成する制御部と、
前記画像データ信号中から前記所定期間毎に前記ガンマ補正データ片を順に抽出するガンマ補正データ抽出部と、
前記ガンマ補正データ抽出部で抽出された前記ガンマ補正データ片を保持しつつ前記階調電圧変換部に送出するガンマレジスタと、を含むことを特徴とする請求項12又は13に記載の半導体装置。
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