JP5869767B2 - 液晶表示装置、電子機器 - Google Patents
液晶表示装置、電子機器 Download PDFInfo
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- JP5869767B2 JP5869767B2 JP2011025388A JP2011025388A JP5869767B2 JP 5869767 B2 JP5869767 B2 JP 5869767B2 JP 2011025388 A JP2011025388 A JP 2011025388A JP 2011025388 A JP2011025388 A JP 2011025388A JP 5869767 B2 JP5869767 B2 JP 5869767B2
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- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2230/00—Details of flat display driving waveforms
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
- G09G2320/0214—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display with crosstalk due to leakage current of pixel switch in active matrix panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G3/2003—Display of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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]
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Description
本実施の形態では、酸化物半導体を有するトランジスタ、特に、活性層に酸化物半導体を有するトランジスタを用いて構成された装置(半導体装置、表示装置、または、発光装置)の一例について、図面を参照して説明する。酸化物半導体を有するトランジスタはオフ電流が低いため、酸化物半導体を有する半導体装置などにおいて、オフ電流に起因して生じる不具合を低減することが出来る。または、酸化物半導体を有するトランジスタは、絶縁耐圧が高い。よって、高い電圧が加えられても正常に動作し、高い電圧が加えられている時のオフ電流も低くすることができるため、オフ電流に起因して生じる不具合を低減することが出来る。
本実施の形態では、図2乃至図5で述べた回路111の動作の一例について述べる。
本実施の形態では、回路111の周辺の回路の一例について述べる。
本実施の形態では、画素部101が有する画素の一例を示す。
本実施の形態においては、トランジスタ201a乃至トランジスタ201L、トランジスタ801、トランジスタ1301、トランジスタ1311などとして、チャネル形成領域が酸化物半導体によって構成されるトランジスタを適用する。
本実施の形態では、画素の一例及びその画素の駆動方法について説明する。特に、メモリ性を有する表示素子を含む画素の一例及びその画素の駆動方法の一例について説明する。
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。
102a 画素
102b 画素
102c 画素
102d 画素
103a、103b、103c、103d、103e、103f、103g、103h、103i、103j、103k、103L 配線
104a 配線
104b 配線
111 回路
201a、201b、201c、201d、201e、201f、201g、201h、201i、201j、201k、201L トランジスタ
202a 配線
202b 配線
202c 配線
203a 配線
203b 配線
203c 配線
400 基板
402 ゲート絶縁層
403 保護絶縁層
410 トランジスタ
411 ゲート電極層
414a ソース領域
414b ドレイン領域
415a ソース電極層
415b ドレイン電極層
416 酸化物絶縁層
430 酸化物半導体膜
431 酸化物半導体層
501 回路
502 回路
503 回路
504 回路
511 基板
801 トランジスタ
802 表示素子
802a 発光素子
803 配線
804 容量素子
805 配線
901 信号
902 周期
903 期間
904 期間
905 期間
906 電位
907 信号
907a 信号
907b 信号
907c 信号
908 信号
1301 トランジスタ
1303 配線
1304 容量素子
1305 配線
1311 トランジスタ
Claims (4)
- 画素部と、検査をすることができる機能を有する回路と、を有し、
前記画素部は、赤色の表示に対応する第1の画素と、青色の表示に対応する第2の画素と、緑色の表示に対応する第3の画素と、を有し、
前記第1の画素は、第1のトランジスタと、第1の液晶素子と、を有し、
前記第2の画素は、第2のトランジスタと、第2の液晶素子と、を有し、
前記第3の画素は、第3のトランジスタと、第3の液晶素子と、を有し、
前記第1のトランジスタのソース又はドレインの一方は、第1の信号線と電気的に接続され、前記第1のトランジスタのソース又はドレインの他方は、前記第1の液晶素子と電気的に接続され、
前記第2のトランジスタのソース又はドレインの一方は、第2の信号線と電気的に接続され、前記第2のトランジスタのソース又はドレインの他方は、前記第2の液晶素子と電気的に接続され、
前記第3のトランジスタのソース又はドレインの一方は、第3の信号線と電気的に接続され、前記第3のトランジスタのソース又はドレインの他方は、前記第3の液晶素子と電気的に接続され、
前記回路は、第4のトランジスタと、第5のトランジスタと、第6のトランジスタと、を有し、
前記第4のトランジスタのゲートと、前記第5のトランジスタのゲートと、前記第6のトランジスタのゲートとは、電気的に接続され、
前記第4のトランジスタのソース又はドレインの一方は、前記第1の信号線と電気的に接続され、
前記第5のトランジスタのソース又はドレインの一方は、前記第2の信号線と電気的に接続され、
前記第6のトランジスタのソース又はドレインの一方は、前記第3の信号線と電気的に接続され、
前記第4のトランジスタのソース又はドレインの他方と、前記第5のトランジスタのソース又はドレインの他方と、前記第6のトランジスタのソース又はドレインの他方とは、互いに異なる配線に電気的に接続され、
前記第1のトランジスタのチャネルと、前記第2のトランジスタのチャネルと、前記第3のトランジスタのチャネルと、前記第4のトランジスタのチャネルと、前記第5のトランジスタのチャネルと、前記第6のトランジスタのチャネルとは、酸化物半導体に形成され、
前記第1のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第2のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第3のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第4のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第5のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第6のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であることを特徴とする液晶表示装置。 - 画素部と、検査をすることができる機能を有する回路と、を有し、
前記画素部は、赤色の表示に対応する第1の画素と、青色の表示に対応する第2の画素と、緑色の表示に対応する第3の画素と、を有し、
前記第1の画素は、第1のトランジスタと、第1の液晶素子と、を有し、
前記第2の画素は、第2のトランジスタと、第2の液晶素子と、を有し、
前記第3の画素は、第3のトランジスタと、第3の液晶素子と、を有し、
前記第1のトランジスタのソース又はドレインの一方は、第1の信号線と電気的に接続され、前記第1のトランジスタのソース又はドレインの他方は、前記第1の液晶素子と電気的に接続され、
前記第2のトランジスタのソース又はドレインの一方は、第2の信号線と電気的に接続され、前記第2のトランジスタのソース又はドレインの他方は、前記第2の液晶素子と電気的に接続され、
前記第3のトランジスタのソース又はドレインの一方は、第3の信号線と電気的に接続され、前記第3のトランジスタのソース又はドレインの他方は、前記第3の液晶素子と電気的に接続され、
前記回路は、第4のトランジスタと、第5のトランジスタと、第6のトランジスタと、を有し、
前記第4のトランジスタのゲートと、前記第5のトランジスタのゲートと、前記第6のトランジスタのゲートとは、電気的に接続され、
前記第4のトランジスタのソース又はドレインの一方は、前記第1の信号線と電気的に接続され、
前記第5のトランジスタのソース又はドレインの一方は、前記第2の信号線と電気的に接続され、
前記第6のトランジスタのソース又はドレインの一方は、前記第3の信号線と電気的に接続され、
前記第4のトランジスタのソース又はドレインの他方と、前記第5のトランジスタのソース又はドレインの他方と、前記第6のトランジスタのソース又はドレインの他方とは、互いに異なる配線に電気的に接続され、
検査を行わない期間において、前記配線はフローティング状態であり、
前記第1のトランジスタのチャネルと、前記第2のトランジスタのチャネルと、前記第3のトランジスタのチャネルと、前記第4のトランジスタのチャネルと、前記第5のトランジスタのチャネルと、前記第6のトランジスタのチャネルとは、酸化物半導体に形成され、
前記第1のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第2のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第3のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第4のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第5のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であり、
前記第6のトランジスタのオフ電流は、チャネル幅1μmあたり1zA以下であることを特徴とする液晶表示装置。 - 請求項1又は請求項2において、
前記酸化物半導体は、キャリア密度が1×1012/cm3未満であることを特徴とする液晶表示装置。 - 請求項1乃至請求項3のいずれか一に記載の液晶表示装置と、操作スイッチとを具備する電子機器。
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KR20150146409A (ko) | 2014-06-20 | 2015-12-31 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치, 표시 장치, 입출력 장치, 및 전자 기기 |
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US20110193846A1 (en) | 2011-08-11 |
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