JP2018022150A - 表示装置および電子機器 - Google Patents
表示装置および電子機器 Download PDFInfo
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- JP2018022150A JP2018022150A JP2017141439A JP2017141439A JP2018022150A JP 2018022150 A JP2018022150 A JP 2018022150A JP 2017141439 A JP2017141439 A JP 2017141439A JP 2017141439 A JP2017141439 A JP 2017141439A JP 2018022150 A JP2018022150 A JP 2018022150A
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Abstract
Description
本実施の形態では、本発明の一態様の表示装置について、図面を参照して説明する。
本実施の形態では、本発明の一態様に用いることのできる表示装置の駆動回路について、図12(A)乃至(C)を用いて説明する。
本実施の形態では、本発明の一態様に用いることのできる表示装置、および表示装置の駆動方法について説明する。
図13(A)は、本発明の一態様の表示装置11を説明する図である。表示装置11は、表示部31、駆動回路42a、駆動回路42bおよび駆動回路50を有する。また表示装置11は、外光の照度等を取得する測光部を有していてもよい。
続いて、図14(A)、(B)、(C)を用いて画素ユニット45について説明する。図14(A)、(B)、(C)は、画素ユニット45の構成例を示す模式図である。
図14(A)は、外光を反射する表示素子46R、表示素子46G、表示素子46Bと、光を発する表示素子47R、表示素子47G、表示素子47Bの両方を駆動して画像を表示する動作モードの例を示している。図14(A)に示すように、画素ユニット45は、光R1、光G1、光B1、光R2、光G2、および光B2の6つの光を混色させることにより、所定の色の光55を表示面側に射出することができる。
図14(B)は、外光を反射する表示素子46R、表示素子46G、表示素子46Bを駆動して画像を表示する動作モードの例を示している。図14(B)に示すように、画素ユニット45は、例えば外光の照度が十分に高い場合などでは、第2の画素回路47を駆動させずに、第1の画素回路46からの光(光R1、光G1、および光B1)のみを混色させることにより、所定の色の光55を表示面側に射出することもできる。これにより、極めて低消費電力な駆動を行うことができる。
図14(C)は、表示素子47R、表示素子47G、表示素子47Bを駆動して画像を表示する動作モードの例を示している。図14(C)に示すように、画素ユニット45は、例えば外光の照度が極めて小さい場合などでは、第1の画素回路46を駆動させずに、第2の画素回路47からの光(光R2、光G2、および光B2)のみを混色させることにより、所定の色の光55を表示面側に射出することもできる。これにより鮮やかな表示を行うことができる。また外光の照度が小さい場合に輝度を低くすることで、使用者が感じる眩しさを抑えると共に消費電力を低減できる。
以下では、本発明の一態様の表示装置に用いることのできる表示パネルの例について説明する。以下で例示する表示パネルは、反射型の液晶素子と、発光素子の両方を有し、透過モードと反射モードの両方の表示を行うことのできる、表示パネルである。
図15(A)は、表示装置400の構成の一例を示すブロック図である。表示装置400は、表示部362にマトリクス状に配列した複数の画素410を有する。また表示装置400は、回路GDと、回路SDを有する。また、方向Rに配列した複数の画素410、回路GDと電気的に接続する複数の配線G1、複数の配線G2、複数の配線ANO、および複数の配線CSCOMを有する。また、方向Cに配列した複数の画素410、回路SDと電気的に接続する複数の配線S1、および複数の配線S2を有する。
図16は、画素410の構成例を示す回路図である。図16では、隣接する2つの画素410を示している。
図18は、本発明の一態様の表示パネル300の斜視概略図である。表示パネル300は、基板351と基板361とが貼り合わされた構成を有する。図18では、基板361を破線で明示している。
図19に、図18で例示した表示パネルの、FPC372を含む領域の一部、回路364を含む領域の一部、および表示部362を含む領域の一部をそれぞれ切断したときの断面の一例を示す。
以下では、上記に示す各構成要素について説明する。
表示パネルが有する基板には、平坦面を有する材料を用いることができる。表示素子からの光を取り出す側の基板には、該光を透過する材料を用いる。例えば、ガラス、石英、セラミック、サファイヤ、有機樹脂などの材料を用いることができる。
トランジスタは、ゲート電極として機能する導電層と、半導体層と、ソース電極として機能する導電層と、ドレイン電極として機能する導電層と、ゲート絶縁層として機能する絶縁層と、を有する。上記では、ボトムゲート構造のトランジスタを適用した場合を示している。
以下では、本発明の一態様で開示されるトランジスタに用いることができるCAC(Cloud−Aligned Composite)−OSの構成について説明する。
トランジスタのゲート、ソースおよびドレインのほか、表示装置を構成する各種配線および電極などの導電層に用いることのできる材料としては、アルミニウム、チタン、クロム、ニッケル、銅、イットリウム、ジルコニウム、モリブデン、銀、タンタル、またはタングステンなどの金属、またはこれを主成分とする合金などが挙げられる。またこれらの材料を含む膜を単層で、または積層構造として用いることができる。例えば、シリコンを含むアルミニウム膜の単層構造、チタン膜上にアルミニウム膜を積層する二層構造、タングステン膜上にアルミニウム膜を積層する二層構造、銅−マグネシウム−アルミニウム合金膜上に銅膜を積層する二層構造、チタン膜上に銅膜を積層する二層構造、タングステン膜上に銅膜を積層する二層構造、チタン膜または窒化チタン膜と、その上に重ねてアルミニウム膜または銅膜を積層し、さらにその上にチタン膜または窒化チタン膜を形成する三層構造、モリブデン膜または窒化モリブデン膜と、その上に重ねてアルミニウム膜または銅膜を積層し、さらにその上にモリブデン膜または窒化モリブデン膜を形成する三層構造等がある。なお、酸化インジウム、酸化錫または酸化亜鉛等の酸化物を用いてもよい。また、マンガンを含む銅を用いると、エッチングによる形状の制御性が高まるため好ましい。
各絶縁層に用いることのできる絶縁材料としては、例えば、アクリル、エポキシなどの樹脂、シロキサン結合を有する樹脂の他、酸化シリコン、酸化窒化シリコン、窒化酸化シリコン、窒化シリコン、酸化アルミニウムなどの無機絶縁材料を用いることもできる。
液晶素子としては、例えば垂直配向(VA:Vertical Alignment)モードが適用された液晶素子を用いることができる。垂直配向モードとしては、MVA(Multi−Domain Vertical Alignment)モード、PVA(Patterned Vertical Alignment)モード、ASV(Advanced Super View)モードなどを用いることができる。
発光素子としては、自発光が可能な素子を用いることができ、電流または電圧によって輝度が制御される素子をその範疇に含んでいる。例えば、LED、有機EL素子、無機EL素子等を用いることができる。
接着層としては、紫外線硬化型等の光硬化型接着剤、反応硬化型接着剤、熱硬化型接着剤、嫌気型接着剤などの各種硬化型接着剤を用いることができる。これら接着剤としてはエポキシ樹脂、アクリル樹脂、シリコーン樹脂、フェノール樹脂、ポリイミド樹脂、イミド樹脂、PVC(ポリビニルクロライド)樹脂、PVB(ポリビニルブチラル)樹脂、EVA(エチレンビニルアセテート)樹脂等が挙げられる。特に、エポキシ樹脂等の透湿性が低い材料が好ましい。また、二液混合型の樹脂を用いてもよい。また、接着シート等を用いてもよい。
接続層としては、異方性導電フィルム(ACF:Anisotropic Conductive Film)や、異方性導電ペースト(ACP:Anisotropic Conductive Paste)などを用いることができる。
着色層に用いることのできる材料としては、金属材料、樹脂材料、顔料または染料が含まれた樹脂材料などが挙げられる。
遮光層として用いることのできる材料としては、カーボンブラック、チタンブラック、金属、金属酸化物、複数の金属酸化物の固溶体を含む複合酸化物等が挙げられる。遮光層は、樹脂材料を含む膜であってもよいし、金属などの無機材料の薄膜であってもよい。また、遮光層に、着色層の材料を含む膜の積層膜を用いることもできる。例えば、ある色の光を透過する着色層に用いる材料を含む膜と、他の色の光を透過する着色層に用いる材料を含む膜との積層構造を用いることができる。着色層と遮光層の材料を共通化することで、装置を共通化できるほか工程を簡略化できるため好ましい。
本発明の一態様に係る表示装置を用いることができる電子機器として、表示機器、パーソナルコンピュータ、記録媒体を備えた画像記憶装置または画像再生装置、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図20に示す。
11 表示装置
20 基板
21 配線
22 配線
25 平坦化膜
27 導電層
30 画素回路
31 表示部
40 駆動回路
40a 層
40b 層
41 配線
42a 駆動回路
42b 駆動回路
45 画素ユニット
46 画素回路
46B 表示素子
46G 表示素子
46R 表示素子
47 画素回路
47B 表示素子
47G 表示素子
47R 表示素子
50 駆動回路
51 配線
55 光
60 シフトレジスタ回路
61 トランジスタ
62 半導体層
63 ゲート電極
64 ソース電極
65 ドレイン電極
66 接続部
68 導電層
69 ゲート絶縁膜
70 バッファ回路
71 トランジスタ
72 半導体層
73 ゲート電極
74 ドレイン電極
75 ソース電極
76a 接続部
76b 接続部
77 導電層
78 導電層
79 ゲート絶縁膜
81 信号線
82 信号線
83 信号線
84 信号線
85 配線
90 パルス信号出力回路
91 入力端子
92 入力端子
93 入力端子
94 入力端子
95 入力端子
96 出力端子
97 出力端子
98 電源線
99 電源線
101 トランジスタ
102 トランジスタ
103 トランジスタ
104 トランジスタ
105 トランジスタ
106 トランジスタ
107 トランジスタ
108 トランジスタ
109 トランジスタ
110 トランジスタ
111 トランジスタ
112 液晶
113 導電層
117 絶縁層
121 絶縁層
130 偏光板
131 着色層
132 遮光層
133a 配向膜
133b 配向膜
134 着色層
141 接着層
142 接着層
191 導電層
192 EL層
193a 導電層
193b 導電層
200 パルス信号生成回路
201 入力信号生成回路
201a トランジスタ
201b トランジスタ
202 入力信号生成回路
203 バッファ回路
204 接続部
205 トランジスタ
206 トランジスタ
207 トランジスタ
208 接続部
211a 絶縁層
211b 絶縁層
212a 絶縁層
212b 絶縁層
213a 絶縁層
213b 絶縁層
214a 絶縁層
214b 絶縁層
215 絶縁層
216 絶縁層
217 絶縁層
220 絶縁層
221 導電層
222 導電層
231 半導体層
242 接続層
243 接続体
251 開口
252 接続部
300 表示パネル
311 電極
311a 導電層
311b 導電層
340 液晶素子
351 基板
360 発光素子
360b 発光素子
360g 発光素子
360r 発光素子
360w 発光素子
361 基板
362 表示部
364 回路
365 配線
372 FPC
373 IC
400 表示装置
410 画素
451 開口
901 筐体
902 筐体
903 表示部
904 表示部
905 マイク
906 スピーカ
907 操作キー
908 スタイラス
909 カメラ
911 筐体
912 表示部
919 カメラ
931 筐体
932 表示部
933 リストバンド
935 ボタン
936 竜頭
939 カメラ
951 筐体
952 表示部
953 操作ボタン
954 外部接続ポート
955 スピーカ
956 マイク
957 カメラ
961 筐体
962 シャッターボタン
963 マイク
965 表示部
966 操作キー
967 スピーカ
971 筐体
972 筐体
973 表示部
974 操作キー
975 レンズ
976 接続部
Claims (8)
- 同一面上に設けられた画素回路および駆動回路を有する表示装置であって、
前記駆動回路は選択回路およびバッファ回路を有し、
前記選択回路は第1のトランジスタを有し、
前記バッファ回路は第2のトランジスタを有し、
前記第1のトランジスタと前記第2のトランジスタは重なる領域を有し、
前記第1のトランジスタのソースまたはドレインの一方は、前記第2のトランジスタのゲートと電気的に接続され、
前記第2のトランジスタのソースまたはドレインの一方は、前記画素回路と電気的に接続されている表示装置。 - 同一面上に設けられた画素回路および駆動回路を有する表示装置であって、
前記駆動回路は選択回路およびバッファ回路を有し、
前記選択回路は第1のトランジスタを有し、
前記バッファ回路は第2のトランジスタを有し、
前記画素回路は、第3のトランジスタおよび第4のトランジスタを有し、
前記第1のトランジスタと前記第2のトランジスタは重なる領域を有し、
前記第3のトランジスタと前記第4のトランジスタは重なる領域を有し、
前記第1のトランジスタのソースまたはドレインの一方は、前記第2のトランジスタのゲートと電気的に接続され、
前記第2のトランジスタのソースまたはドレインの一方は、前記第3のトランジスタのゲートと電気的に接続されている表示装置。 - 請求項1または2において、
前記駆動回路および前記画素回路が有するトランジスタは、単極性である表示装置。 - 請求項1乃至3のいずれか一項において、
前記駆動回路および前記画素回路が有するトランジスタのチャネル形成領域は、金属酸化物を有する表示装置。 - 請求項1乃至4のいずれか一項において、
前記第1のトランジスタと、前記第2のトランジスタとの間に導電層を有し、
前記導電層には前記駆動回路で用いられる最も低い電位が供給されている表示装置。 - 請求項1乃至5のいずれか一項において、
前記画素回路は第1の表示素子を有し、
前記第1の表示素子は可視光を発する機能または可視光を透過する機能を有する表示装置。 - 請求項6において、
前記画素回路は、さらに第2の表示素子を有し、
前記第2の表示素子は、可視光を反射する機能を有する表示装置。 - 請求項1乃至請求項7のいずれか一項に記載の表示装置と、前記表示装置と重なる位置にタッチセンサを備えた電子機器。
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2020
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JP7240542B2 (ja) | 2023-03-15 |
US11335746B2 (en) | 2022-05-17 |
JP2023085261A (ja) | 2023-06-20 |
JP2022087145A (ja) | 2022-06-09 |
US20180026037A1 (en) | 2018-01-25 |
US20220271109A1 (en) | 2022-08-25 |
US20200152897A1 (en) | 2020-05-14 |
US10541375B2 (en) | 2020-01-21 |
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