JP2006330582A - 液晶表示駆動用半導体集積回路 - Google Patents
液晶表示駆動用半導体集積回路 Download PDFInfo
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Abstract
【解決手段】 液晶表示装置(300)を表示駆動する半導体集積回路化された液晶表示駆動用半導体集積回路(200)に、データを電気的に書き込み可能な不揮発性メモリ回路(EPROM)またはデータを電気的に書き込み消去可能な不揮発性メモリ回路(EEPROM)を内蔵させ該メモリ回路(250)に設定情報を格納させる。これとともに、メモリ回路は他の回路を構成する素子を形成する半導体製造プロセスと同一の工程によって形成することが可能な通常の素子で構成するようにした。
【選択図】 図1
Description
この発明の前記ならびにそのほかの目的と新規な特徴については、本明細書の記述および添附図面から明らかになるであろう。
すなわち、液晶表示装置を表示駆動する半導体集積回路化された液晶表示駆動用半導体集積回路に、データを電気的に書き込み可能な不揮発性メモリ回路(EPROM)またはデータを電気的に書き込み消去可能な不揮発性メモリ回路(EEPROM)を内蔵させ該メモリ回路に設定情報を格納させる。これとともに、メモリ回路は他の回路を構成する素子を形成する半導体製造プロセスと同一の工程によって形成することが可能な通常の素子で構成するようにしたものである。
すなわち、本発明に従うと、使用する液晶表示装置の仕様に応じた駆動条件等の設定を容易に行なうことができる使い勝手のよい液晶駆動制御用半導体集積回路を実現することができる。
先ず、本発明を適用して有効な不揮発性メモリ回路を内蔵した液晶表示駆動用半導体集積回路(液晶コントロールドライバIC)200を、図1を用いて説明する。図1は、不揮発性メモリ回路を内蔵した液晶コントロールドライバIC200とこのドライバにより駆動されるTFT液晶パネル300とからなる液晶表示システムの構成を示すブロック図である。
この書込み動作の説明は、特に制限されるものでないが、本実施例の液晶コントロールドライバでは、電源投入後にMPUからリセット信号RESETが入力されるとハイレベルからロウレベルになる場合の例を示している。また、図7の例は、アドレスは000〜011の4つのアドレスに書込む場合の例を示している。
t3のタイミングで、コントロールレジスタのデータが確定するが、データの内容は、書込みデータWDATA、書込みデアドレスADDR、ROM制御データOP0、OP1などである。書込みの場合は、制御データOP0のデータを0(Low)から1(High)にする。このとき、OP0が1(High)ならば、WE/RE制御回路264を制御して、書込み許可信号WEをハイレベルにアサートして、書き込み動作が行われる。
210 ソースドライバ
220 ゲートドライバ
230 コモンドライバ
240 LCD用電源回路
250 不揮発性メモリ回路
251 第1の領域(メーカ使用領域)
252 第2の領域(ユーザ使用領域)
254 電源制御回路
255 不揮発性メモリセル
256 読出し/書込み回路
260 制御部
261 インデックスレジスタ
262 コンロールレジスタ
263 データレジスタ
264 リード/ライト制御回路
270 発振回路
280 タイミングコントロール回路
290 表示用RAM
300 TFT液晶パネル
Claims (10)
- 液晶パネルの走査線に印加される駆動信号および液晶パネルの信号線に印加される駆動信号を生成し出力する1つの半導体チップ上に形成された液晶表示駆動用半導体集積回路であって、電気的に書き込み可能な不揮発性メモリ回路または電気的に書き込み消去可能な不揮発性メモリ回路を内蔵し、前記不揮発性メモリ回路は前記半導体チップ上の他の回路を構成している素子を形成する半導体製造プロセスの工程によって形成される素子により構成されていることを特徴とする液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路は、当該半導体集積回路の内部の初期設定情報を記憶するために用いられることを特徴とする請求項1に記載の液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路は、複数のグループに分けられ、いずれか1つのグループのメモリ回路は当該半導体集積回路内部の回路の特性ばらつきを補正するための設定情報を書き込むのに使用され、残りのグループのメモリ回路は当該半導体集積回路により駆動される液晶パネルの特性に合わせた設定情報を書き込むのに使用されることを特徴とする請求項2に記載の液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路は、複数のグループに分けられ、いずれか1つのグループのメモリ回路は当該半導体集積回路を製造するメーカ側で格納すべき設定情報を書き込むのに使用され、残りのグループのメモリ回路は当該半導体集積回路を用いた装置を製造するユーザ側で格納すべき設定情報を書き込むのに使用されることを特徴とする請求項2に記載の液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路は、電気的に1度だけ書き込み可能な不揮発性メモリ回路により構成されているとともに、前記いずれか1つのグループのメモリ回路は単一のグループとされ、前記残りのグループはさらに複数のサブグループに分けられて、書き込みの度に別のサブグループが選択されることにより見かけ上複数回の書き換えが可能なメモリ回路として構成されていることを特徴とする請求項3または4のいずれかに記載の液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路は、電気的に1度だけ書き込み可能な不揮発性メモリ回路により構成されているとともに、前記いずれか1つのグループのメモリ回路と前記残りのグループのメモリ回路に対応してそれぞれ書込み用の高電圧が印加される電源電圧端子が別個に設けられていることを特徴とする請求項3〜5のいずれかに記載の液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路は、各々同一のデータを記憶する多重化されたメモリセルにより構成されていることを特徴とする請求項1〜6のいずれかに記載の液晶表示駆動用半導体集積回路。
- 前記不揮発性メモリ回路および前記他の回路は、Pチャネル型電界効果トランジスタとNチャネル型電界効果トランジスタとからなるCMOS回路により構成されていることを特徴とする請求項1〜7のいずれかに記載の液晶表示駆動用半導体集積回路。
- 前記半導体チップは矩形状であり、上記走査線に印加される駆動信号および信号線に印加される駆動信号を出力する端子が上記半導体チップの長手方向の一方の縁部に沿って配置され、前記半導体チップの長手方向の他方の縁部に沿ってメモリ回路の書込み用の高電圧が印加される電源電圧端子と入力端子が配置され、前記不揮発性メモリ回路は前記電源電圧端子の近傍に配置されていることを特徴とする請求項1〜8のいずれかに記載の液晶表示駆動用半導体集積回路。
- 前記半導体チップは矩形状であり、上記走査線に印加される駆動信号および信号線に印加される駆動信号を出力する端子が上記半導体チップの長手方向の一方の縁部に沿って配置され、前記半導体チップの長手方向の他方の縁部のほぼ中央にメモリ回路の書込み用の高電圧が印加される電源電圧端子が配置され、前記半導体チップのほぼ中央に前記不揮発性メモリ回路の書込みおよび読出しを行なう制御回路が配置され、前記不揮発性メモリ回路は前記制御回路と前記電源電圧端子の近傍に配置されていることを特徴とする請求項1〜8のいずれかに記載の液晶表示駆動用半導体集積回路。
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005157390A JP5057417B2 (ja) | 2005-05-30 | 2005-05-30 | 液晶表示駆動用半導体集積回路 |
TW095118818A TWI415048B (zh) | 2005-05-30 | 2006-05-26 | Liquid crystal display driving semiconductor integrated circuit |
US11/441,166 US7826264B2 (en) | 2005-05-30 | 2006-05-26 | Semiconductor integrated circuit device for driving liquid crystal display |
TW102114360A TWI502566B (zh) | 2005-05-30 | 2006-05-26 | Liquid crystal display driving semiconductor integrated circuit |
KR1020060048202A KR20060125494A (ko) | 2005-05-30 | 2006-05-29 | 액정 표시 구동용 반도체 집적 회로 |
CN2010102827561A CN101944345B (zh) | 2005-05-30 | 2006-05-30 | 用于驱动液晶显示器的半导体集成电路 |
CN2006100877470A CN1873761B (zh) | 2005-05-30 | 2006-05-30 | 用于驱动液晶显示器的半导体集成电路 |
US12/890,642 US8089810B2 (en) | 2005-05-30 | 2010-09-25 | Semiconductor integrated circuit device for driving liquid crystal display |
US13/305,532 US8345480B2 (en) | 2005-05-30 | 2011-11-28 | Semiconductor integrated circuit device for driving liquid crystal display |
KR1020120102129A KR101208197B1 (ko) | 2005-05-30 | 2012-09-14 | 액정 표시 구동용 반도체 집적 회로 |
KR1020130007960A KR101252435B1 (ko) | 2005-05-30 | 2013-01-24 | 액정 표시 구동용 반도체 집적 회로 |
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Also Published As
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KR20060125494A (ko) | 2006-12-06 |
TW201333908A (zh) | 2013-08-16 |
US20120069670A1 (en) | 2012-03-22 |
KR20120112321A (ko) | 2012-10-11 |
CN101944345A (zh) | 2011-01-12 |
CN1873761A (zh) | 2006-12-06 |
KR101208197B1 (ko) | 2012-12-04 |
US8345480B2 (en) | 2013-01-01 |
US7826264B2 (en) | 2010-11-02 |
CN101944345B (zh) | 2012-12-26 |
KR20130016419A (ko) | 2013-02-14 |
JP5057417B2 (ja) | 2012-10-24 |
US20060267903A1 (en) | 2006-11-30 |
KR101252435B1 (ko) | 2013-04-12 |
CN1873761B (zh) | 2010-11-03 |
US8089810B2 (en) | 2012-01-03 |
TW200707372A (en) | 2007-02-16 |
TWI415048B (zh) | 2013-11-11 |
TWI502566B (zh) | 2015-10-01 |
US20110012906A1 (en) | 2011-01-20 |
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