JP2010140023A - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
- Publication number
- JP2010140023A JP2010140023A JP2009257642A JP2009257642A JP2010140023A JP 2010140023 A JP2010140023 A JP 2010140023A JP 2009257642 A JP2009257642 A JP 2009257642A JP 2009257642 A JP2009257642 A JP 2009257642A JP 2010140023 A JP2010140023 A JP 2010140023A
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- Prior art keywords
- transistor
- wiring
- source
- drain
- signal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
【解決手段】画素や回路中で、ある特定レベルの信号(Lレベル信号)を出力し続けるトランジスタにおいて、当該トランジスタを流れる電流の方向を入れ替える(反転させる)構成とする。つまり、トランジスタの第1の端子と第2の端子(ソース又はドレインとなる端子)に加わる電圧の大小関係を任意の期間毎に入れ替えることにより、ソースとドレインを任意の期間毎に切り替える構成とする。具体的には、トランジスタを有する回路において、ある特定レベルの信号(Lレベル信号)を出力し続ける部分では、当該特定レベルの信号として、互いに異なる複数の電位を有するLレベル信号(任意の期間毎に電位が変化するLレベル信号)を用いる。
【選択図】図1
Description
本実施の形態では、トランジスタを具備する半導体装置の一例に関して説明する。
本実施の形態では、上記実施の形態と異なる構成を有する半導体装置の一例に関し図面を参照して説明する。
図6(A)〜(F)はそれぞれ、配線103から出力される信号(Out)、配線101に入力される信号(IN1)、配線102に入力される信号(IN2)、トランジスタ111のゲートに入力される信号(IN3)、トランジスタ112aのゲートに入力される信号(IN4)、トランジスタ112bのゲートに入力される信号(IN5)を示している。図6では、配線102に入力される信号(IN2)の周期がトランジスタ112a、112bのゲートに入力される信号(IN4、IN5)の1/2である場合を示している。もちろん、入力される信号(IN1〜IN5)は一例であり、これらに限定されるものでない。
以下の説明において、図7、図8の(A)〜(F)はそれぞれ、配線103から出力される信号(Out)、配線101に入力される信号(IN1)、配線102に入力される信号(IN2)、トランジスタ111のゲートに入力される信号(IN3)、トランジスタ112aのゲートに入力される信号(IN4)、トランジスタ112bのゲートに入力される信号(IN5)を示している。図7、図8では、配線102に入力される信号(IN2)の周期がトランジスタ112a、112bのゲートに入力される信号(IN4、IN5)より大きい場合(IN2の周期がIN4、IN5の周期の2倍の場合)を示している。もちろん、入力される信号(IN1〜IN5)は一例であり、これらに限定されるものでない。
以下の説明において、図9、図10の(A)〜(F)はそれぞれ、配線103から出力される信号(Out)、配線101に入力される信号(IN1)、配線102に入力される信号(IN2)、トランジスタ111のゲートに入力される信号(IN3)、トランジスタ112aのゲートに入力される信号(IN4)、トランジスタ112bのゲートに入力される信号(IN5)を示している。図9、図10では、配線102に入力される信号(IN2)の周期がトランジスタ112a、112bのゲートに入力される信号(IN4、IN5)の周期と等しい場合を示している。もちろん、入力される信号(IN1〜IN5)は一例であり、これらに限定されるものでない。
本実施の形態では、上記実施の形態と異なる構成を有する半導体装置の一例に関し図面を参照して説明する。
本実施の形態では、上記実施の形態で示した構成の使用形態に関し図面を参照して説明する。
本実施の形態においては、上記実施の形態で示した回路に適用可能なトランジスタの構造について説明する。トランジスタは、トランジスタが有する半導体層に用いる材料によって大きく分類されることができる。半導体層に用いる材料としては、主成分としてシリコンが含まれるシリコン系材料と、主成分としてシリコンを含まない非シリコン系材料に分類できる。シリコン系材料には、アモルファスシリコン(a−Si:H)、マイクロクリスタルシリコン(μc−Si)、ポリシリコン(p−Si)、単結晶シリコン(c−Si)等が挙げられる。非シリコン系材料としては、砒化ガリウム(GaAs)等の化合物半導体、酸化亜鉛(ZnO)、インジウムとガリウムと亜鉛を含む酸化物(InGaZnO)等の酸化物半導体等が挙げられる。
本実施の形態では、上記実施の形態で示した表示装置を適用した様々な電子機器について、図面を参照して説明する。
102 配線
103 配線
104 配線
111 トランジスタ
112 トランジスタ
114 トランジスタ
115 容量素子
121 トランジスタ
122 トランジスタ
125 画素電極
126 対向電極
128 トランジスタ
129 発光素子
161 トランジスタ
162 トランジスタ
163 トランジスタ
201 トランジスタ
202 トランジスタ
203 トランジスタ
204 トランジスタ
205 トランジスタ
206 トランジスタ
207 トランジスタ
208 容量素子
211 配線
213 配線
221 トランジスタ
222 トランジスタ
223 トランジスタ
224 トランジスタ
225 トランジスタ
226 トランジスタ
227 トランジスタ
228 トランジスタ
229 トランジスタ
230 トランジスタ
231 トランジスタ
232 トランジスタ
241 配線
243 配線
251 トランジスタ
252 トランジスタ
253 トランジスタ
254 トランジスタ
255 トランジスタ
263 配線
264 配線
271 トランジスタ
272 トランジスタ
273 トランジスタ
274 トランジスタ
275 トランジスタ
276 トランジスタ
277 トランジスタ
278 トランジスタ
279 トランジスタ
280 トランジスタ
281 配線
283 配線
101a 配線
103a 配線
103b 配線
103c 配線
112a トランジスタ
112b トランジスタ
141a 配線
142a 配線
212a 配線
212b 配線
212c 配線
242a 配線
242b 配線
262a 配線
262b 配線
282a 配線
282b 配線
5141 基板
5142 絶縁膜
5143 導電層
5144 導電層
5145 導電層
5146 半導体層
5147 半導体層
5148 半導体層
5149 絶縁膜
5150 絶縁膜
5151 導電層
5152 導電層
5158 トランジスタ
5159 容量素子
5161 基板
5162 絶縁膜
5163 導電層
5164 導電層
5165 絶縁膜
5166 半導体層
5167 半導体層
5168 半導体層
5169 導電層
5170 導電層
5171 導電層
5178 トランジスタ
5179 容量素子
5181 基板
5182 絶縁膜
5183 導電層
5184 導電層
5185 絶縁膜
5186 半導体層
5187 半導体層
5188 半導体層
5189 導電層
5190 導電層
5191 導電層
5192 絶縁膜
5198 トランジスタ
5199 容量素子
5201 基板
5202 絶縁膜
5203 導電層
5204 導電層
5205 不純物領域
5205 不純物領域
5206 不純物領域
5207 不純物領域
5208 LDD領域
5209 LDD領域
5210 チャネル形成領域
5211 絶縁膜
5211 絶縁膜
5212 導電層
5213 導電層
5214 絶縁膜
5218 トランジスタ
5219 容量素子
8001 筐体
8002 支持台
8003 表示部
8004 スピーカー部
8005 ビデオ入力端子
8102 筐体
8103 表示部
8104 キーボード
8105 外部接続ポート
8106 ポインティングデバイス
8202 表示部
8204 外部接続ポート
8205 リモコン受信部
8206 受像部
8209 操作キー
8301 照明部
8302 傘
8303 可変アーム
8305 スイッチ
8403 表示部
8404 音声入力部
8406 操作キー
8407 外部接続ポート
Claims (11)
- ソース又はドレインの一方が第1の配線と電気的に接続され、他方が第3の配線と電気的に接続された第1のトランジスタと、
ソース又はドレインの一方が第2の配線と電気的に接続され、他方が前記第3の配線と電気的に接続された第2のトランジスタと、
ゲートが前記第3の配線に電気的に接続され、前記第3の配線に供給される選択信号によりオンとなり且つ非選択信号によりオフとなる第3のトランジスタとを有し、
前記選択信号は、前記第1のトランジスタがオンしている期間に前記第1の配線から前記第3の配線へ供給され、
前記非選択信号は、前記第2のトランジスタがオンしている期間に前記第2の配線から前記第3の配線へ供給され、
前記選択信号又は前記非選択信号の少なくとも一方は、所定の期間毎に電位が変化する信号であることを特徴とする液晶表示装置。 - 請求項1において、
前記非選択信号は、少なくとも前記第2のトランジスタがオンしている期間に電位が変化する信号であることを特徴とする液晶表示装置。 - 請求項1において、
前記選択信号は、少なくとも前記第1のトランジスタがオンしている期間に電位が変化する信号であることを特徴とする液晶表示装置。 - ソース又はドレインの一方が第1の配線と電気的に接続され、他方が第3の配線と電気的に接続された第1のトランジスタと、
ソース又はドレインの一方が第2の配線と電気的に接続され、他方が前記第3の配線と電気的に接続され、且つ互いに並列に設けられた複数の第2のトランジスタと、
ゲートが前記第3の配線に電気的に接続され、前記第3の配線に供給される選択信号によりオンとなり且つ非選択信号によりオフとなる第3のトランジスタとを有し、
前記選択信号は、前記第1のトランジスタがオンしている期間に前記第1の配線から前記第3の配線へ供給され、
前記非選択信号は、所定の期間毎に電位が変化する信号であり、前記複数の第2のトランジスタのいずれかがオンしている期間に前記第2の配線から第3の配線へ供給されることを特徴とする液晶表示装置。 - 請求項4において、
前記非選択信号は、少なくとも前記複数の第2のトランジスタのいずれかがオンしている期間に電位が変化する信号であることを特徴とする液晶表示装置。 - 請求項4又は請求項5において、
前記複数の第2のトランジスタが、それぞれ所定の順番にオンとオフを交互に繰り返すことを特徴とする液晶表示装置。 - 請求項4乃至請求項6のいずれか一項において、
前記複数の第2のトランジスタを流れる電流の方向が入れ替わることを特徴とする液晶表示装置。 - ソース又はドレインの一方が第1の配線と電気的に接続され、他方が第3の配線と電気的に接続された第1のトランジスタと、
ソース又はドレインの一方が第2の配線と電気的に接続され、他方が前記第3の配線と電気的に接続された第2のトランジスタと、
ソース又はドレインの一方が第4の配線と電気的に接続され、他方が前記第3の配線と電気的に接続された第4のトランジスタと、
ゲートが前記第3の配線に電気的に接続され、前記第3の配線に供給される選択信号によりオンとなり且つ非選択信号によりオフとなる第3のトランジスタとを有し、
前記選択信号は、前記第1のトランジスタがオンしている期間に前記第1の配線から前記第3の配線へ供給され、
前記非選択信号は、前記第2のトランジスタがオンしている期間又は前記第4のトランジスタがオンしている期間に、前記第2の配線又は前記第4の配線から前記第3の配線へ供給され、
前記第2の配線及び前記第4の配線には互いに異なる電位が印加され、
所定の期間毎に前記第2の配線に印加される電位と前記第4の配線に印加される電位が入れ替わることを特徴とする液晶表示装置。 - 請求項8において、
前記第2のトランジスタ及び前記第4のトランジスタを流れる電流の方向が入れ替わることを特徴とする液晶表示装置。 - 請求項1乃至請求項9のいずれか一項において、
前記第3のトランジスタのソース又はドレインの一方が、画素電極に電気的に接続されていることを特徴とする液晶表示装置。 - 請求項1乃至請求項10のいずれか一項において、
前記第1のトランジスタ、前記第2のトランジスタ及び前記第3のトランジスタは、アモルファスシリコン又は微結晶シリコンをチャネル形成領域とするトランジスタであることを特徴とする液晶表示装置。
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