JP2008293003A - 液晶表示装置の駆動方法、液晶表示装置及び電子機器 - Google Patents
液晶表示装置の駆動方法、液晶表示装置及び電子機器 Download PDFInfo
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- 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
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- 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
- G09G3/36—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 using liquid crystals
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- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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- G—PHYSICS
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
- G09G3/2025—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having all the same time duration
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- G09G3/2007—Display of intermediate tones
- G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
- G09G3/2081—Display of intermediate tones by a combination of two or more gradation control methods with combination of amplitude modulation and time modulation
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- 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
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- 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
- G09G3/36—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 using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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Abstract
【解決手段】1フレーム期間をn(n:整数、n≧3)の期間(以下、サブフレーム期間と記す)に分割する。すなわち、180Hz以上の周波数にて駆動を行う。また、液晶の応答速度に起因する輝度の損失を補償するように液晶に電圧を印加する。ここで、補償された電圧は第1サブフレーム期間以外のサブフレーム期間に印加される。
【選択図】図1
Description
本実施の形態では、本発明の駆動方法とその原理を図1乃至図3を用いて以下に説明する。
本実施の形態では、実施の形態1にて説明した方法とは異なる駆動方法について図4を用いて説明する。
本実施の形態では、本発明の他の駆動方法について図5を用いて説明する。
本実施の形態においては、実施の形態3において説明された補償電圧の印加パターンについて、いくつかの場合に分けて説明する。具体的には、対象とする1フレーム期間A(補償電圧を印加する対象となる1フレーム期間)と、直前の1フレーム期間B、及び直後の1フレーム期間Cの信号電圧の大小関係によって、補償電圧を印加するサブフレーム期間を選択する様子について説明する。
補償電圧が正の場合
・直後の1フレーム期間における信号電圧が、対象とする1フレーム期間における信号電圧より低い場合(及び、差がない場合):最初のサブフレーム期間、及び最後のサブフレーム期間以外のサブフレーム期間を選択して補償電圧を加える。
・直後の1フレーム期間における信号電圧が、対象とする1フレーム期間における信号電圧より高い場合:最後のサブフレーム期間を含むサブフレーム期間を選択して補償電圧を加える。
補償電圧が負の場合
・直後の1フレーム期間における信号電圧が、対象とする1フレーム期間における信号電圧より高い場合(及び、差がない場合):最初のサブフレーム期間、及び最後のサブフレーム期間以外のサブフレーム期間を選択して補償電圧を加える。
・直後の1フレーム期間における信号電圧が、対象とする1フレーム期間における信号電圧より低い場合:最後のサブフレーム期間を含むサブフレーム期間を選択して補償電圧を加える。
本発明の液晶表示装置に用いることができるアクティブマトリクス基板の作製方法の一例を図6乃至図8を用いて説明する。なお、本実施の形態では結晶性半導体膜を用いた場合について説明するが、非晶質半導体膜、単結晶半導体膜を用いてもよい。
本実施の形態では、本発明の駆動方法を用いた液晶表示装置の作製工程について、図9乃至図11を用いて説明する。
本実施の形態においては、SOI(Silicon on Insulator)基板を用いた液晶表示装置について以下に説明する。なお、本実施の形態に係るSOI基板は、単結晶半導体基板から、異種基板(以下、「ベース基板」ともいう)に転写して形成するものである。
本発明の液晶表示装置を用いた電子機器について、図23を参照して説明する。
110 ベース基板
400 バックライト消灯期間
500 目標応答量
510 目標応答量
520 目標応答量
530 目標応答量
600 基板
602 下地膜
604 半導体膜
608 線状レーザー
610 結晶性半導体膜
612 島状半導体膜
614 島状半導体膜
618 絶縁膜
620 導電膜
622 導電膜
624 上層ゲート電極
630 下層ゲート電極
636 ゲート電極
640 ゲート電極
642 チャネル形成領域
644 ドレイン領域
646 チャネル形成領域
650 ゲート絶縁膜
656 ドレイン領域
658 低濃度不純物領域
664 層間絶縁膜
666 層間絶縁膜
668 配線
674 配線
676 配線
678 nチャネル型TFT
680 pチャネル型TFT
682 画素TFT(nチャネル型TFT)
684 CMOS回路
Claims (9)
- 画素電極に電圧を印加することで階調を表現する液晶表示装置の駆動方法であって、
1フレーム期間をn個(n:整数,3≦n)のサブフレーム期間に分割し、
前記n個のサブフレーム期間のうち第mサブフレーム期間(m:整数,2≦m≦n)以外のサブフレーム期間において、前記液晶表示装置外部から入力される信号に対応した信号電圧を前記画素電極に印加し、
前記n個のサブフレーム期間のうち第mサブフレーム期間において、液晶の応答遅れに起因して生じる目標階調からのずれを補償する補償電圧を前記信号電圧に加えて前記画素電極に印加することを特徴とする液晶表示装置の駆動方法。 - 請求項1において、
対象とする1フレーム期間の第nサブフレーム期間に印加される電圧と、前記対象とする1フレーム期間の次の1フレーム期間の第1サブフレーム期間に印加される電圧との差が小さくなるように、前記補償電圧を加える前記第mサブフレーム期間を選択することを特徴とする液晶表示装置の駆動方法。 - 画素電極に電圧を印加することで階調を表現する液晶表示装置の駆動方法であって、
1フレーム期間をn個(n:整数,3≦n)のサブフレーム期間に分割し、
前記n個のサブフレーム期間のうち第1サブフレーム期間以外のサブフレーム期間をk個(k:整数,1≦k≦n−1)選択し、
前記選択されたk個のサブフレーム期間以外のn−k個のサブフレーム期間において、前記液晶表示装置外部から入力される信号に対応した信号電圧を前記画素電極に印加し、
前記選択されたk個のサブフレーム期間において、液晶の応答遅れに起因して生じる目標階調からのずれを補償する電圧を前記信号電圧に加えて前記画素電極に印加することを特徴とする液晶表示装置の駆動方法。 - 請求項3において、
対象とする1フレーム期間の第nサブフレーム期間に印加される電圧と、前記対象とする1フレーム期間の次の1フレーム期間の第1サブフレーム期間に印加される電圧との差が小さくなるように、前記補償電圧を加える前記k個のサブフレーム期間を選択することを特徴とする液晶表示装置の駆動方法。 - 請求項1乃至4のいずれか一において、
前記n個のサブフレーム期間のうちの第1サブフレーム期間においては、バックライトを消灯することを特徴とする液晶表示装置の駆動方法。 - 請求項1乃至5のいずれか一において、
前記n個のサブフレーム期間のうちの第1サブフレーム期間においては、前記信号電圧に代えてオーバードライブ電圧を印加することを特徴とする液晶表示装置の駆動方法。 - 請求項1乃至6のいずれか一に記載の液晶表示装置の駆動方法を用いた液晶表示装置。
- 請求項7において、
保持容量を形成するための容量配線を画素部に有さないことを特徴とする液晶表示装置。 - 請求項7又は8に記載の液晶表示装置を用いた電子機器。
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JP2011221500A (ja) * | 2010-03-26 | 2011-11-04 | Panasonic Corp | 画像表示装置 |
WO2012090444A1 (ja) * | 2010-12-27 | 2012-07-05 | パナソニック液晶ディスプレイ株式会社 | 表示装置及び映像視聴システム |
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JP2008300612A (ja) * | 2007-05-31 | 2008-12-11 | Panasonic Corp | 表示装置及びその製造方法 |
US8299537B2 (en) * | 2009-02-11 | 2012-10-30 | International Business Machines Corporation | Semiconductor-on-insulator substrate and structure including multiple order radio frequency harmonic supressing region |
KR101944239B1 (ko) | 2009-10-09 | 2019-01-31 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 발광 표시 장치 및 이를 포함한 전자 기기 |
US9128289B2 (en) * | 2012-12-28 | 2015-09-08 | Pixtronix, Inc. | Display apparatus incorporating high-aspect ratio electrical interconnects |
KR102005496B1 (ko) * | 2012-09-21 | 2019-10-02 | 삼성디스플레이 주식회사 | 표시장치 및 그 구동 방법 |
KR20150022296A (ko) | 2013-08-22 | 2015-03-04 | 삼성디스플레이 주식회사 | 표시장치 및 표시장치의 구동방법 |
KR102246262B1 (ko) | 2014-07-30 | 2021-04-30 | 삼성디스플레이 주식회사 | 표시 패널의 구동 방법 및 이를 수행하기 위한 표시 장치 |
JP2019101243A (ja) * | 2017-12-04 | 2019-06-24 | 三菱電機株式会社 | 液晶表示パネルおよびその製造方法 |
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JP2011221500A (ja) * | 2010-03-26 | 2011-11-04 | Panasonic Corp | 画像表示装置 |
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Also Published As
Publication number | Publication date |
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EP1986180A3 (en) | 2009-09-02 |
KR20080096379A (ko) | 2008-10-30 |
KR101401513B1 (ko) | 2014-06-03 |
US8115785B2 (en) | 2012-02-14 |
US20080266227A1 (en) | 2008-10-30 |
JP5094529B2 (ja) | 2012-12-12 |
EP1986180B1 (en) | 2017-05-03 |
EP1986180A2 (en) | 2008-10-29 |
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