JP2011141529A - 表示装置、及び当該表示装置を具備する電子機器 - Google Patents
表示装置、及び当該表示装置を具備する電子機器 Download PDFInfo
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- JP2011141529A JP2011141529A JP2010250760A JP2010250760A JP2011141529A JP 2011141529 A JP2011141529 A JP 2011141529A JP 2010250760 A JP2010250760 A JP 2010250760A JP 2010250760 A JP2010250760 A JP 2010250760A JP 2011141529 A JP2011141529 A JP 2011141529A
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- 230000007704 transition Effects 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1222—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer
- H01L27/1225—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Ceramic Engineering (AREA)
- Geometry (AREA)
- Thin Film Transistor (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Shift Register Type Memory (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
【解決手段】第1のトランジスタ、第2のトランジスタ、及び一対の電極を有する発光素子を含む画素が複数設けられた画素部を有し、前記第1のトランジスタは、ゲートが走査線に電気的に接続され、ソースまたはドレインの一方が信号線に電気的に接続され、ソースまたはドレインの他方が前記第2のトランジスタのゲートに電気的に接続され、前記第2のトランジスタは、ソースまたはドレインの一方が電源線に電気的に接続され、ソースまたはドレインの他方が前記一対の電極の一方に電気的に接続され、前記第1のトランジスタは、水素濃度が5×1019/cm3以下である酸化物半導体層を有する。そして、前記表示装置が静止画像を表示する期間の間に、前記画素部に含まれる全ての走査線に供給される信号の出力が停止される期間を有する。
【選択図】図2
Description
本実施の形態では、本発明の一態様である表示装置の一例について説明する。特に、表示装置の画素部に設けられる画素の構成の一例について図1乃至図6を用いながら説明する。
また、EL層の一部として、第2の電極に接する電子注入層を設ける場合、仕事関数の大小に関わらず、Al、Ag、ITO等の様々な導電性材料を第2の電極として用いることができる。これら導電性材料は、スパッタリング法やインクジェット法、スピンコート法等を用いて成膜することが可能である。
本実施の形態では、表示装置の消費電力を更に抑制する構成について説明する。具体的には、表示装置の画素部における消費電力を抑制することに加え、表示装置の駆動回路部における消費電力を抑制する構成について説明する。
表示パネル1800には駆動回路1802、1804及び画素部1806が設けられている。駆動回路1802が設けられる領域に重畳して共通電位電極1808が配設されている。共通電位電極1808と共通電位端子1812の間には、両者の接続/非接続を制御するスイッチ素子1810が設けられている。
本実施の形態では、実施の形態1で説明した第1のトランジスタ6401の構造の一例、及びその作製方法の一例について説明する。すなわち、高純度の酸化物半導体を用いたトランジスタの構造の一例、及びその作製方法の一例について説明する。
本実施の形態では、実施の形態1で説明した第1のトランジスタ6401の構造の一例、及びその作製方法の一例について説明する。すなわち、高純度の酸化物半導体を用いたトランジスタの構造の一例、及びその作製方法の一例について図15を用いながら説明する。
本実施の形態では、実施の形態1で説明した第1のトランジスタ6401の構造の一例、及びその作製方法の一例について説明する。すなわち、高純度の酸化物半導体を用いたトランジスタの構造の一例、及びその作製方法の一例について図16を用いながら説明する。
本実施の形態は、本明細書で開示する表示装置に適用できるトランジスタの他の例を示す。本実施の形態で示すトランジスタ350は、実施の形態1の画素部の各画素に用いるトランジスタ6401等に用いることができる。
本実施の形態では、画素部に蓄光層を設けた表示装置の一態様について説明する。
本実施の形態においては、上記実施の形態で説明した表示装置を具備する電子機器の具体例について説明する。ただし、本発明に適用可能な電子機器は、下記に示す具体例に限定されるものではない。
1001 表示パネル
1002 信号生成回路
1003 記憶回路
1004 比較回路
1005 選択回路
1006 表示制御回路
1007 駆動回路部
1008 画素部
1009A ゲート線駆動回路
1009B 信号線駆動回路
1010 フレームメモリ
Claims (10)
- 第1のトランジスタ、第2のトランジスタ、及び一対の電極を有する発光素子を含む画素が複数設けられた画素部を有し、
前記第1のトランジスタは、ゲートが走査線に電気的に接続され、ソースまたはドレインの一方が信号線に電気的に接続され、ソースまたはドレインの他方が前記第2のトランジスタのゲートに電気的に接続され、
前記第2のトランジスタは、ソースまたはドレインの一方が電源線に電気的に接続され、ソースまたはドレインの他方が前記一対の電極の一方に電気的に接続され、
前記第1のトランジスタは、水素濃度が5×1019/cm3以下である酸化物半導体層を有することを特徴とする表示装置。 - 請求項1において、前記表示装置が静止画像を表示する期間の間に、前記画素部に含まれる全ての走査線に供給される信号の出力が停止される期間を有することを特徴とする表示装置。
- 第1のトランジスタ、第2のトランジスタ、及び一対の電極を有する発光素子を含む画素が複数設けられた画素部と、
前記画素部を駆動する駆動回路部と、
前記駆動回路部を駆動する制御信号、及び前記画素に供給する画像信号を生成する信号生成回路と、
前記画像信号をフレーム期間毎に記憶する記憶回路と、
前記記憶回路で前記フレーム期間毎に記憶された画像信号のうち、連続するフレーム期間の画像信号の差分を検出する比較回路と、
前記比較回路で差分を検出した際に前記連続するフレーム期間の画像信号を選択して出力する選択回路と、
前記比較回路で差分を検出した際に前記制御信号及び前記選択回路より出力される画像信号の前記駆動回路部への供給を行い、前記比較回路で差分を検出しない際に前記制御信号の前記駆動回路部への供給を停止する表示制御回路とを有し、
前記第1のトランジスタは、ゲートが走査線に電気的に接続され、ソースまたはドレインの一方が信号線に電気的に接続され、ソースまたはドレインの他方が前記第2のトランジスタのゲートに電気的に接続され、
前記第2のトランジスタは、ソースまたはドレインの一方が電源線に電気的に接続され、ソースまたはドレインの他方が前記一対の電極の一方に電気的に接続され、
前記第1のトランジスタは、水素濃度が5×1019/cm3以下である酸化物半導体層を有することを特徴とする表示装置。 - 請求項3において、前記制御信号は、高電源電位、低電源電位、クロック信号、スタートパルス信号、またはリセット信号であることを特徴とする表示装置。
- 請求項1乃至4のいずれか一において、前記画素に蓄光層をさらに有することを特徴とする表示装置。
- 請求項1乃至5のいずれか一において、前記酸化物半導体層は、キャリア濃度が1×1014/cm3未満であることを特徴とする表示装置。
- 請求項1乃至6のいずれか一において、前記酸化物半導体層は、バンドギャップが2eV以上であることを特徴とする表示装置。
- 請求項1乃至7のいずれか一において、前記第2のトランジスタは、水素濃度が5×1019/cm3以下である酸化物半導体層を有することを特徴とする表示装置。
- 請求項1乃至7のいずれか一において、前記第2のトランジスタは、多結晶シリコン層を有することを特徴とする表示装置。
- 請求項1乃至9のいずれか一に記載の表示装置を具備する電子機器。
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