JP2011090761A - 駆動回路、当該駆動回路を具備する表示装置、当該表示装置を具備する電子機器 - Google Patents
駆動回路、当該駆動回路を具備する表示装置、当該表示装置を具備する電子機器 Download PDFInfo
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- JP2011090761A JP2011090761A JP2010206240A JP2010206240A JP2011090761A JP 2011090761 A JP2011090761 A JP 2011090761A JP 2010206240 A JP2010206240 A JP 2010206240A JP 2010206240 A JP2010206240 A JP 2010206240A JP 2011090761 A JP2011090761 A JP 2011090761A
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- transistor
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- terminal
- wiring
- clock signal
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
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Abstract
【解決手段】第1のトランジスタ及び第2のトランジスタを有するインバータ回路と、第3のトランジスタを有するスイッチと、を含むスタティックのシフトレジスタ回路を有し、第1のトランジスタ乃至第3のトランジスタは、酸化物半導体でなる半導体層を有し、且つディプレッション型のトランジスタであり、第3のトランジスタを駆動するクロック信号の振幅電圧は、インバータ回路を駆動するための電源電圧より大きい駆動回路とする。
【選択図】図1
Description
本実施の形態では、まず、複数段のパルス出力回路を有するスタティック型のシフトレジスタ回路である駆動回路の構成について図面を参照して説明する。本実施の形態で示す駆動回路では、スイッチとして機能する薄膜トランジスタ、及びインバータ回路(反転回路ともいう)によって構成される。
本実施の形態では、上記実施の形態1で説明した駆動回路の構成に加え、デマルチプレクサ回路をパルス出力回路の各出力端子に設ける駆動回路の構成について図面を参照して説明する。実施の形態1の駆動回路の構成である、スイッチとして機能する薄膜トランジスタ、及びインバータ回路によって構成される駆動回路に、本実施の形態で説明する構成を付加することでさらなる低消費電力化が図ることができ好適である。
本実施の形態では、上記実施の形態で説明した駆動回路の作製工程、特に酸化物半導体層を半導体層に具備する薄膜トランジスタの上面図及び断面図について説明する。また本実施の形態で説明する駆動回路を具備する表示装置では、液晶表示装置に適用することができる。なお他にも、有機EL等の発光素子を具備する表示装置に適用することができる。また、上記実施の形態で説明した駆動回路は電気泳動素子を具備する電子ペーパーの駆動回路として適用することが可能である。なお、表示装置の駆動回路に限らず、光センサ用駆動回路等の他の装置にも適用可能である。
本実施の形態では、同一基板上に少なくとも駆動回路の一部と、画素部に配置する薄膜トランジスタを作製する例について以下に説明する。画素部に配置する薄膜トランジスタは、実施の形態3と同様に形成すればよい。
本実施形態においては、上記実施の形態で説明した表示装置を表示部に具備する電子機器の例について説明する。
101 配線
102 配線
103 パルス出力回路
104 配線
111 第1のスイッチ
112 第1のインバータ回路
113 第2のインバータ回路
114 第2のスイッチ
115 第3のスイッチ
116 第3のインバータ回路
117 第4のインバータ回路
118 第4のスイッチ
120 インバータ回路
121 第1のトランジスタ
122 配線
123 第2のトランジスタ
124 配線
130 インバータ回路
131 第1のトランジスタ
132 第2のトランジスタ
140 トランジスタ
141 波形
142 波形
143 波形
144 波形
145 波形
201 ゲート配線
202 ゲート配線
203 半導体層
204 半導体層
205 配線
400 駆動回路
401 配線
402 配線
403 パルス出力回路
404 配線
405 デマルチプレクサ回路
406 配線
501 第1のトランジスタ
502 第2のトランジスタ
503 第3のトランジスタ
504 第4のトランジスタ
505 第5のトランジスタ
506 第6のトランジスタ
507 第7のトランジスタ
508 第8のトランジスタ
509 第9のトランジスタ
510 第10のトランジスタ
511 第11のトランジスタ
512 第12のトランジスタ
513 第13のトランジスタ
514 第14のトランジスタ
515 配線
516 配線
517 配線
518 配線
901 基板
902 下地膜
904 ゲート絶縁層
906 電極層
907 絶縁層
1211 筐体
1212 支持台
1213 表示部
1231 本体
1232 表示部
1233 受像部
1234 操作キー
1235 外部接続ポート
1236 シャッターボタン
1251 本体
1252 筐体
1253 表示部
1254 キーボード
1255 外部接続ポート
1256 ポインティングデバイス
5300 基板
5301 画素部
5302 走査線駆動回路
5303 走査線駆動回路
5304 信号線駆動回路
5305 タイミング制御回路
903A ゲート電極層
903B ゲート電極層
905A 酸化物半導体層
450 デマルチプレクサ回路
451 第1のトランジスタ
452 第2のトランジスタ
453 第3のトランジスタ
454 第4のトランジスタ
455 第5のトランジスタ
456 第6のトランジスタ
457 第7のトランジスタ
458 第8のトランジスタ
459 配線
460 インバータ回路
461 配線
462 配線
463 配線
464 配線
Claims (10)
- 第1のトランジスタ及び第2のトランジスタを有するインバータ回路と、
第3のトランジスタを有するスイッチと、
を含むスタティックのシフトレジスタ回路を有し、
前記第1のトランジスタ乃至前記第3のトランジスタは、酸化物半導体を有する半導体層を有し、且つディプレッション型のトランジスタであり、
前記第3のトランジスタを駆動するクロック信号の振幅電圧は、前記インバータ回路を駆動するための電源電圧より大きいことを特徴とする駆動回路。 - 第1のトランジスタ及び第2のトランジスタを有するインバータ回路と、
第3のトランジスタを有するスイッチと、
を含むスタティックのシフトレジスタ回路と、
前記シフトレジスタ回路の出力端子にはデマルチプレクサ回路を有し、
前記第1のトランジスタ乃至前記第3のトランジスタは、酸化物半導体を有する半導体層を有し、且つディプレッション型のトランジスタであり、
前記第1のトランジスタを駆動するクロック信号の振幅電圧は、前記インバータ回路を駆動するための電源電圧より大きく、
前記デマルチプレクサ回路の出力端子には、当該出力端子の電位を固定するための第4のトランジスタがそれぞれ設けられていることを特徴とする駆動回路。 - 請求項1または2において、
前記クロック信号は、第1のクロック信号、及び第2のクロック信号であり、
前記第2のクロック信号は、前記第1のクロック信号の反転信号であることを特徴とする駆動回路。 - 請求項1乃至請求項3のいずれか一において、
前記第1のトランジスタのL/W比は、前記第2のトランジスタのL/W比より大きいことを特徴とする駆動回路。 - 請求項1乃至請求項4のいずれか一において、
前記第1のトランジスタの半導体層の膜厚は、前記第2のトランジスタの半導体層の膜厚より大きいことを特徴とする駆動回路。 - 請求項1乃至請求項5のいずれか一において、
前記デマルチプレクサ回路を構成する第5のトランジスタのL/W比は、前記第4のトランジスタのL/W比より小さいことを特徴とする駆動回路。 - 請求項1乃至請求項6のいずれか一において、
前記第4のトランジスタは、ゲートは高電源電位が供給される配線に電気的に接続され、第1端子は低電源電位が供給される配線に電気的に接続され、第2端子は前記デマルチプレクサ回路の出力端子に電気的に接続されていることを特徴とする駆動回路。 - 請求項1乃至請求項7のいずれか一において、
前記第1乃至前記第4のトランジスタは、nチャネル型のトランジスタであることを特徴とする駆動回路。 - 請求項1乃至請求項8のいずれか一に記載の駆動回路を具備する表示装置。
- 請求項9に記載の表示装置を具備する電子機器。
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