JP2010224532A - 半導体装置の駆動方法 - Google Patents
半導体装置の駆動方法 Download PDFInfo
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- JP2010224532A JP2010224532A JP2010036196A JP2010036196A JP2010224532A JP 2010224532 A JP2010224532 A JP 2010224532A JP 2010036196 A JP2010036196 A JP 2010036196A JP 2010036196 A JP2010036196 A JP 2010036196A JP 2010224532 A JP2010224532 A JP 2010224532A
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Abstract
【解決手段】nチャネル型の導電型を有するトランジスタと、トランジスタのゲートと第1の端子との電気的な接続を制御するためのスイッチと、トランジスタのゲートと第2の端子との間に電気的に接続された容量素子と、表示素子と、を有する半導体装置の駆動方法であって、容量素子に、トランジスタのしきい値電圧に応じた電圧及び映像信号電圧の和を保持する第1の期間と、スイッチを導通状態とすることにより、映像信号電圧及びしきい値電圧の和に応じて容量素子に保持された電荷を、トランジスタを介して放電する第2の期間と、第2の期間の後に、トランジスタを介して、表示素子に電流を供給する第3の期間と、を有する。
【選択図】図1
Description
図1に、トランジスタの移動度などの電流特性のばらつきを補正する場合の駆動方法、駆動タイミングおよび、その時の回路構成について、その一例を示す。なお、本実施の形態においては、トランジスタの導電型がnチャネル型の例について説明を行う。
次に、本実施の形態では、実施の形態1で述べた回路および駆動方法の応用例について示す。
次に、本実施の形態では、実施の形態1で述べた回路および駆動方法の応用例について示す。
次に、本実施の形態では、実施の形態1で述べた回路および駆動方法の応用例について示す。
次に、本実施の形態では、実施の形態1で述べた回路および駆動方法の応用例について示す。
次に、本実施の形態では、実施の形態1で述べた回路および駆動方法の応用例について示す。
本実施の形態では、実施の形態1乃至実施の形態6で述べた回路について、具体例を示す。
次に、表示装置の別の構成例およびその駆動方法について説明する。本実施の形態においては、表示装置の外部から入力される画像(入力画像)の動きを補間する画像を、複数の入力画像を基にして表示装置の内部で生成し、当該生成された画像(生成画像)と、入力画像とを順次表示させる方法について説明する。なお、生成画像を、入力画像の動きを補間するような画像とすることで、動画の動きを滑らかにすることができ、さらに、ホールド駆動による残像等によって動画の品質が低下する問題を改善できる。ここで、動画の補間について、以下に説明する。動画の表示は、理想的には、個々の画素の輝度をリアルタイムに制御することで実現されるものであるが、画素のリアルタイム個別制御は、制御回路の数が膨大なものとなる問題、配線スペースの問題、および入力画像のデータ量が膨大なものとなる問題等が存在し、実現が困難である。したがって、表示装置による動画の表示は、複数の静止画を一定の周期で順次表示することで、表示が動画に見えるようにして行なわれている。この周期(本実施の形態においては入力画像信号周期と呼び、Tinと表す)は規格化されており、例として、NTSC規格では1/60秒、PAL規格では1/50秒である。この程度の周期でも、インパルス型表示装置であるCRTにおいては動画表示に問題は起こらなかった。しかし、ホールド型表示装置においては、これらの規格に準じた動画をそのまま表示すると、ホールド型であることに起因する残像等により表示が不鮮明となる不具合(ホールドぼけ:hold blur)が発生してしまう。ホールドぼけは、人間の目の追従による無意識的な動きの補間と、ホールド型の表示との不一致(discrepancy)で認識されるものであるので、従来の規格よりも入力画像信号周期を短くする(画素のリアルタイム個別制御に近づける)ことで低減させることができるが、入力画像信号周期を短くすることは規格の変更を伴い、さらに、データ量も増大することになるので、困難である。しかしながら、規格化された入力画像信号を基にして、入力画像の動きを補間するような画像を表示装置内部で生成し、当該生成画像によって入力画像を補間して表示することで、規格の変更またはデータ量の増大なしに、ホールドぼけを低減できる。このように、入力画像信号を基にして表示装置内部で画像信号を生成し、入力画像の動きを補間することを、動画の補間と呼ぶこととする。
本実施の形態では、表示装置の一例について説明する。
本実施の形態では、トランジスタ、及び容量素子の作製工程の一例を示す。特に、半導体層として、酸化物半導体を用いる場合の作製工程について説明する。酸化物半導体層としては、InMO3(ZnO)m(m>0)で表記される層を用いることが可能である。なお、Mとしては、Ga、Fe、Ni、Mn及びCoから選ばれた一の金属元素又は複数の金属元素などがある。例えば、Mとして、Gaの場合があることの他、GaとNi又はGaとFeなど、Ga以外の上記金属元素が含まれる場合がある。なお、酸化物半導体において、Mとして含まれる金属元素の他に、不純物元素としてFe、Niその他の遷移金属元素、又は該遷移金属の酸化物が含まれているものがある。このような薄膜をIn−Ga−Zn−O系非単結晶膜と示すことが可能である。なお、酸化物半導体としては、ZnOを用いることが可能である。なお、酸化物半導体層の可動イオン、代表的にはナトリウムの濃度は、5×1018/cm3以下、更には1×1018/cm3以下であると、トランジスタの電気特性が変化することを抑制することができるため好ましい。ただし、これに限定されず、半導体層としては、他に様々な材料の酸化物半導体を用いることが可能である。または、半導体層としては、単結晶半導体、多結晶半導体、微結晶(マイクロクリスタル、又はナノクリスタル)半導体、非晶質(アモルファス)半導体、又は、様々な非単結晶半導体などを用いることが可能である。
本実施の形態では、トランジスタの構造の一例について図24(A)、(B)、及び(C)を参照して説明する。
なお、これらの材料は、配線、電極、導電層、導電膜、端子、ビア、プラグなどにも用いることが可能である。
本実施の形態においては、電子機器の例について説明する。
102 容量素子
103 配線
104 配線
105 表示素子
106 配線
107 回路素子
108 配線
201 スイッチ
202 スイッチ
203 スイッチ
204 スイッチ
205 スイッチ
206 配線
207 スイッチ
208 配線
301 スイッチ
303 スイッチ
305 スイッチ
306 配線
307 スイッチ
308 配線
401 スイッチ
403 スイッチ
405 スイッチ
406 配線
407 スイッチ
408 配線
501 スイッチ
503 スイッチ
505 スイッチ
506 配線
507 スイッチ
508 配線
601 スイッチ
603 スイッチ
605 スイッチ
606 配線
607 スイッチ
608 配線
101A トランジスタ
101B トランジスタ
101M トランジスタ
102A 容量素子
102B 容量素子
102M 容量素子
103M 配線
104M 配線
105M 発光素子
106M 配線
106N 配線
106P 配線
106Q 配線
201M トランジスタ
202M トランジスタ
203M トランジスタ
204M トランジスタ
9630 筐体
9631 表示部
9632 表示部
9633 スピーカ
9634 LEDランプ
9635 操作キー
9636 接続端子
9637 センサ
9638 マイクロフォン
9670 スイッチ
9671 赤外線ポート
9672 記録媒体読込部
9673 支持部
9674 イヤホン
9675 アンテナ
9676 シャッターボタン
9677 受像部
9678 充電器
9679 支持台
9680 外部接続ポート
9681 ポインティングデバイス
9682 リーダ/ライタ
9730 筐体
9731 表示部
9732 リモコン装置
9733 スピーカ
9741 表示パネル
9742 ユニットバス
9761 表示パネル
9762 車体
9781 天井
9782 表示パネル
9783 ヒンジ部
1200M 画素
1200N 画素
1200P 画素
1200Q 画素
1201M 配線
1202M 配線
1203M 配線
1204M 配線
5121 画像
5122 画像
5123 画像
5124 領域
5125 領域
5126 領域
5127 ベクトル
5128 画像生成用ベクトル
5129 領域
5130 物体
5131 領域
5260 基板
5261 絶縁層
5262 半導体層
5263 絶縁層
5264 導電層
5265 絶縁層
5266 導電層
5267 絶縁層
5268 導電層
5269 絶縁層
5270 発光層
5271 導電層
5300 基板
5301 導電層
5302 絶縁層
5304 導電層
5305 絶縁層
5306 導電層
5307 液晶層
5308 導電層
5350 領域
5351 領域
5352 半導体基板
5353 領域
5354 絶縁層
5355 領域
5356 絶縁層
5357 導電層
5358 絶縁層
5359 導電層
5360 映像信号
5361 回路
5362 回路
5363 回路
5364 画素部
5365 回路
5366 照明装置
5367 画素
5371 配線
5372 配線
5373 配線
5380 基板
5381 入力端子
5420 基板
5421 導電層
5422 導電層
5423 絶縁層
5424 コンタクトホール
5425 酸化物半導体層
5429 導電層
5430 導電層
5431 導電層
5432 絶縁層
5433 導電層
5434 導電層
5435 絶縁層
5436 酸化物半導体層
5437 導電層
5438 導電層
5439 導電層
5440 導電層
5441 トランジスタ
5442 容量素子
5121a 画像
5121b 画像
5122a 画像
5122b 画像
5123a 画像
5123b 画像
5262a 領域
5262b 領域
5262c 領域
5262d 領域
5262e 領域
5303a 半導体層
5303b 半導体層
5361a 回路
5361b 回路
5362a 回路
5362b 回路
2501 容量素子
2502 容量素子
Claims (4)
- nチャネル型の導電型を有するトランジスタと、前記トランジスタのゲートと前記トランジスタの第1の端子との導通状態を制御するためのスイッチと、前記トランジスタのゲートと前記トランジスタの第2の端子との間に電気的に接続された容量素子と、表示素子と、を有する半導体装置の駆動方法であって、
前記容量素子に、前記トランジスタのしきい値電圧に応じた電圧及び映像信号電圧の和を保持する第1の期間と、
前記スイッチを導通状態とすることにより、前記映像信号電圧及び前記しきい値電圧の和に応じて前記容量素子に保持された電荷を、前記トランジスタを介して放電する第2の期間と、
前記第2の期間の後に、前記トランジスタを介して、前記表示素子に電流を供給する第3の期間と、
を有する半導体装置の駆動方法。 - nチャネル型の導電型を有するトランジスタと、前記トランジスタのゲートと前記トランジスタの第1の端子との導通状態を制御するためのスイッチと、前記トランジスタのゲートと前記トランジスタの第2の端子との間に電気的に接続された容量素子と、表示素子と、を有する半導体装置の駆動方法であって、
前記容量素子に、前記トランジスタのしきい値電圧に応じた電圧を保持する第1の期間と、
前記容量素子に、前記トランジスタのしきい値電圧に応じた電圧及び映像信号電圧の和を保持する第2の期間と、
前記スイッチを導通状態とすることにより、前記映像信号電圧及び前記しきい値電圧の和に応じて前記容量素子に保持された電荷を、前記トランジスタを介して放電する第3の期間と、
前記第3の期間の後に、前記トランジスタを介して、前記表示素子に電流を供給する第4の期間と、
を有する半導体装置の駆動方法。 - nチャネル型の導電型を有するトランジスタと、前記トランジスタのゲートと前記トランジスタの第1の端子との導通状態を制御するためのスイッチと、前記トランジスタのゲートと前記トランジスタの第2の端子との間に電気的に接続された容量素子と、表示素子と、を有する半導体装置の駆動方法であって、
前記容量素子に保持された電圧を初期化するための第1の期間と、
前記容量素子に、前記トランジスタのしきい値電圧に応じた電圧を保持する第2の期間と、
前記容量素子に、前記トランジスタのしきい値電圧に応じた電圧及び映像信号電圧の和を保持する第3の期間と、
前記スイッチを導通状態とすることにより、前記映像信号電圧及び前記しきい値電圧の和に応じて前記容量素子に保持された電荷を、前記トランジスタを介して放電する第4の期間と、
前記第4の期間の後に、前記トランジスタを介して、前記表示素子に電流を供給する第5の期間と、
を有する半導体装置の駆動方法。 - 請求項1乃至請求項3のいずれか一に記載の駆動方法を用いた半導体装置および操作スイッチを具備した電子機器。
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JP5714827B2 (ja) | 2015-05-07 |
TW201115538A (en) | 2011-05-01 |
JP2015146028A (ja) | 2015-08-13 |
JP2022159306A (ja) | 2022-10-17 |
JP5976869B2 (ja) | 2016-08-24 |
CN101819987A (zh) | 2010-09-01 |
KR20100098327A (ko) | 2010-09-06 |
JP2018077476A (ja) | 2018-05-17 |
JP6243486B2 (ja) | 2017-12-06 |
CN106409228B (zh) | 2019-11-15 |
US20210167219A1 (en) | 2021-06-03 |
US9047815B2 (en) | 2015-06-02 |
US20150280005A1 (en) | 2015-10-01 |
JP7320653B2 (ja) | 2023-08-03 |
US20220310848A1 (en) | 2022-09-29 |
JP7550930B2 (ja) | 2024-09-13 |
JP2021167963A (ja) | 2021-10-21 |
US11387368B2 (en) | 2022-07-12 |
JP2021073497A (ja) | 2021-05-13 |
TWI488161B (zh) | 2015-06-11 |
US20230402547A1 (en) | 2023-12-14 |
CN106409228A (zh) | 2017-02-15 |
US20100220117A1 (en) | 2010-09-02 |
US20190006522A1 (en) | 2019-01-03 |
US10930787B2 (en) | 2021-02-23 |
JP2016194723A (ja) | 2016-11-17 |
KR101652087B1 (ko) | 2016-08-29 |
JP2023145576A (ja) | 2023-10-11 |
JP2019211786A (ja) | 2019-12-12 |
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