JP2013076994A - 発光装置 - Google Patents
発光装置 Download PDFInfo
- Publication number
- JP2013076994A JP2013076994A JP2012198124A JP2012198124A JP2013076994A JP 2013076994 A JP2013076994 A JP 2013076994A JP 2012198124 A JP2012198124 A JP 2012198124A JP 2012198124 A JP2012198124 A JP 2012198124A JP 2013076994 A JP2013076994 A JP 2013076994A
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- Prior art keywords
- transistor
- gate electrode
- light
- potential
- emitting element
- Prior art date
- 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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Links
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Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
-
- 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
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- 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
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Abstract
【解決手段】通常のゲート電極(第1ゲート電極)の他に、閾値電圧を制御するための第2ゲート電極が備えられたトランジスタを用いて、発光素子への電流の供給を制御する構成を有する。さらに、上記発光装置は、上記トランジスタの第1ゲート電極とドレイン端子の間の導通または非導通を選択する単数または複数のスイッチを有する。そして、トランジスタの閾値電圧を取得する際に、上記スイッチによりトランジスタの第1ゲート電極とドレイン端子の間を導通させ、なおかつ、第2ゲート電極の電位を制御することでトランジスタの閾値電圧をシフトさせる構成とする。
【選択図】図1
Description
図1に、本発明の一態様に係る発光装置の、画素の構成を示す。図1に示す画素10は、スイッチ11と、画像信号に従って電流の量を制御する回路12と、スイッチ13と、上記回路12から上記電流が供給される発光素子14とを有する。
図4に、本発明の一態様に係る発光装置の、画素の具体的な構成の一例を示す。
図10に、本発明の一態様に係る発光装置の、画素の具体的な構成の一例を示す。
図4に示した画素10を例に挙げて、本発明の一態様に係る発光装置の、画素のレイアウトについて、図11及び図12を用いて説明する。図11は、画素の上面図の一例である。また、図12は、図11に示す上面図の、破線A1−A2及び破線A3−A4における断面図の一例に相当する。ただし、図11では、画素のレイアウトを明確に示すために、各種の絶縁膜を省略して、画素の上面図を示す。また、図11では、画素が有する各種半導体素子のレイアウトを明確に示すために、EL層と、カソードとを省略して、画素の上面図を示す。
本発明の一態様に係る発光装置では、白色などの単色の光を発する発光素子と、カラーフィルタを組み合わせることで、フルカラー画像の表示を行う、カラーフィルタ方式を採用することができる。或いは、互いに異なる色相の光を発する複数の発光素子を用いて、フルカラー画像の表示を行う方式を採用することもできる。この方式は、発光素子が有する一対の電極間に設けられるEL層を、対応する色ごとに塗り分けるため、塗り分け方式と呼ばれる。
本実施の形態では、トップエミッション構造、ボトムエミッション構造、デュアルエミッション構造について説明する。デュアルエミッション構造とは、発光素子の光を、素子基板側からと、素子基板とは反対の側からと、取り出す構造を意味する。
図15は、本発明の一態様に係る発光装置の斜視図の一例である。
本発明の一態様に係る発光装置は、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再生装置(代表的にはDVD:Digital Versatile Disc等の記録媒体を再生し、その画像を表示しうるディスプレイを有する装置)に用いることができる。その他に、本発明の一態様に係る発光装置を用いることができる電子機器として、携帯電話、携帯型を含むゲーム機、携帯情報端末、電子書籍、ビデオカメラ、デジタルスチルカメラなどのカメラ、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、プリンター、プリンター複合機、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16に示す。
11 スイッチ
12 回路
13 スイッチ
14 発光素子
15 トランジスタ
16 スイッチ
17 容量素子
18 端子
19 端子
20 端子
21 端子
30 トランジスタ
31 トランジスタ
32 トランジスタ
33 トランジスタ
34 トランジスタ
35 トランジスタ
36 トランジスタ
37 トランジスタ
38 容量素子
40 画素部
51 トランジスタ
52 トランジスタ
53 トランジスタ
54 トランジスタ
55 トランジスタ
56 トランジスタ
57 容量素子
58 容量素子
140b 画素
140g 画素
140r 画素
715b アノード
715g アノード
715r アノード
730 隔壁
731 EL層
732 カソード
740 基板
741b 発光素子
741g 発光素子
741r 発光素子
742 基板
743b 着色層
743g 着色層
743r 着色層
744 オーバーコート
745b 導電膜
745g 導電膜
745r 導電膜
746g 導電膜
746r 導電膜
750 絶縁膜
800 基板
801 導電膜
802 ゲート絶縁膜
803 半導体膜
804 導電膜
805 導電膜
806 導電膜
807 半導体膜
808 導電膜
809 半導体膜
810 導電膜
811 導電膜
812 半導体膜
813 半導体膜
814 導電膜
815 導電膜
816 半導体膜
817 導電膜
818 導電膜
819 導電膜
820 絶縁膜
821 絶縁膜
822 開口部
823 導電膜
824 半導体膜
825 導電膜
826 半導体膜
827 導電膜
828 導電膜
829 導電膜
830 導電膜
831 導電膜
832 半導体膜
833 導電膜
834 導電膜
835 導電膜
836 絶縁膜
837 EL層
838 導電膜
1601 パネル
1602 回路基板
1603 接続部
1604 画素部
1605 走査線駆動回路
1606 信号線駆動回路
5001 筐体
5002 筐体
5003 表示部
5004 表示部
5005 マイクロホン
5006 スピーカー
5007 操作キー
5008 スタイラス
5201 筐体
5202 表示部
5203 支持台
5401 筐体
5402 表示部
5403 キーボード
5404 ポインティングデバイス
5601 筐体
5602 筐体
5603 表示部
5604 表示部
5605 接続部
5606 操作キー
5801 筐体
5802 表示部
5803 音声入力部
5804 音声出力部
5805 操作キー
5806 受光部
6031 トランジスタ
6033 発光素子
6034 アノード
6035 EL層
6036 カソード
6037 絶縁膜
6038 隔壁
6041 トランジスタ
6043 発光素子
6044 アノード
6045 EL層
6046 カソード
6047 絶縁膜
6048 隔壁
6051 トランジスタ
6053 発光素子
6054 アノード
6055 EL層
6056 カソード
6057 絶縁膜
6058 隔壁
Claims (9)
- 発光素子と、
前記発光素子への電流の供給を制御し、なおかつ、半導体膜と、前記半導体膜を間に挟んで対峙する第1ゲート電極及び第2ゲート電極とを有するトランジスタと、
前記トランジスタの前記第1ゲート電極への画像信号の電位の供給を制御する第1スイッチと、
前記トランジスタの前記第2ゲート電極への電位の供給を制御する第2スイッチと、
前記トランジスタの前記第1ゲート電極及びドレイン端子の接続を制御する第3スイッチと、を有する発光装置。 - 発光素子と、
画像信号に従って前記発光素子への電流の供給を制御し、なおかつ、半導体膜と、前記半導体膜を間に挟んで対峙する第1ゲート電極及び第2ゲート電極とを有するトランジスタと、
前記トランジスタの前記第1ゲート電極への前記画像信号の電位の供給を制御する第1スイッチと、
前記トランジスタの前記第2ゲート電極への電位の供給を制御する第2スイッチと、
前記第2ゲート電極への前記電位の供給により前記トランジスタをノーマリオフとした状態において、前記トランジスタの前記第1ゲート電極とドレイン端子を導通の状態とし、前記画像信号の電位に従って前記発光素子へ前記電流を供給する間は前記第1ゲート電極と前記ドレイン端子を非導通の状態とする第3スイッチと、を有する発光装置。 - 発光素子と、
前記発光素子への電流の供給を制御し、なおかつ、半導体膜と、前記半導体膜を間に挟んで対峙する第1ゲート電極及び第2ゲート電極とを有するトランジスタと、
前記トランジスタの前記第1ゲート電極への画像信号の電位の供給を制御する第1スイッチと、
前記トランジスタの前記第2ゲート電極への電位の供給を制御する第2スイッチと、
前記トランジスタの前記第1ゲート電極及びドレイン端子の接続を制御する第3スイッチと、
前記トランジスタの前記第1ゲート電極及びソース端子の間の電位差を保持する容量素子と、を有する発光装置。 - 発光素子と、
画像信号に従って前記発光素子への電流の供給を制御し、なおかつ、半導体膜と、前記半導体膜を間に挟んで対峙する第1ゲート電極及び第2ゲート電極とを有するトランジスタと、
前記トランジスタの前記第1ゲート電極への前記画像信号の電位の供給を制御する第1スイッチと、
前記トランジスタの前記第2ゲート電極への電位の供給を制御する第2スイッチと、
前記第2ゲート電極への前記電位の供給により前記トランジスタをノーマリオフとした状態において、前記トランジスタの前記第1ゲート電極とドレイン端子を導通の状態とし、前記画像信号の電位に従って前記発光素子へ前記電流を供給する間は前記第1ゲート電極と前記ドレイン端子を非導通の状態とする第3スイッチと、
前記トランジスタの前記第1ゲート電極及びソース端子の間の電位差を保持する容量素子と、を有する発光装置。 - 請求項3または請求項4において、
前記容量素子及び前記発光素子が直列に接続されている発光装置。 - 請求項1乃至請求項5のいずれか1項において、前記トランジスタはnチャネル型である発光装置。
- 請求項1乃至請求項6のいずれか1項において、前記トランジスタが有する前記半導体膜は、非晶質シリコンまたは酸化物半導体を含む発光装置。
- 請求項1乃至請求項7のいずれか1項において、前記第1のスイッチ乃至前記第3のスイッチの少なくとも一つは、単数または複数のトランジスタで構成されている発光装置。
- 請求項1乃至請求項7のいずれか1項において、前記第1のスイッチ乃至前記第3のスイッチの少なくとも一つは、単数または複数のnチャネル型のトランジスタで構成されている発光装置。
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US8957889B2 (en) | 2015-02-17 |
JP2022189898A (ja) | 2022-12-22 |
JP6568264B2 (ja) | 2019-08-28 |
JP6099336B2 (ja) | 2017-03-22 |
JP2017123337A (ja) | 2017-07-13 |
JP2019194735A (ja) | 2019-11-07 |
US9305988B2 (en) | 2016-04-05 |
JP2018156091A (ja) | 2018-10-04 |
JP7164739B2 (ja) | 2022-11-01 |
US20150155345A1 (en) | 2015-06-04 |
US20130063413A1 (en) | 2013-03-14 |
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JP2021092792A (ja) | 2021-06-17 |
JP7328433B2 (ja) | 2023-08-16 |
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JP2022062082A (ja) | 2022-04-19 |
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