JP5778919B2 - 表示装置 - Google Patents
表示装置 Download PDFInfo
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- JP5778919B2 JP5778919B2 JP2010269522A JP2010269522A JP5778919B2 JP 5778919 B2 JP5778919 B2 JP 5778919B2 JP 2010269522 A JP2010269522 A JP 2010269522A JP 2010269522 A JP2010269522 A JP 2010269522A JP 5778919 B2 JP5778919 B2 JP 5778919B2
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- oxide semiconductor
- oxide
- transistor
- display device
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—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
- G02F1/01—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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13454—Drivers integrated on the active matrix substrate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/031—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT]
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/031—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT]
- H10D30/0312—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT] characterised by the gate electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6755—Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/40—Crystalline structures
- H10D62/405—Orientations of crystalline planes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/021—Manufacture or treatment of multiple TFTs
- H10D86/0221—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies
- H10D86/0223—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies comprising crystallisation of amorphous, microcrystalline or polycrystalline semiconductor materials
- H10D86/0229—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies comprising crystallisation of amorphous, microcrystalline or polycrystalline semiconductor materials characterised by control of the annealing or irradiation parameters
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/421—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer
- H10D86/423—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/441—Interconnections, e.g. scanning lines
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D99/00—Subject matter not provided for in other groups of this subclass
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—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
- G02F1/01—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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/00—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
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
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- G02F1/00—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
- G02F1/01—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
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- G02F1/00—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
- G02F1/01—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
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
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- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
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- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2330/02—Details of power systems and of start or stop of display operation
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- 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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- G09G3/32—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]
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- 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
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- G09G3/36—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 by control of light from an independent source using liquid crystals
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- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- G09G3/3685—Details of drivers for data electrodes
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thin Film Transistor (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Engineering & Computer Science (AREA)
- Recrystallisation Techniques (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Description
図4に本発明の実施形態を示す。図4(A)はガラス基板1501上に、画素部1502、ゲートドライバ1503、1504を内蔵し、ソース線駆動にアナログスイッチ1505を内蔵した表示装置である。ソース線駆動にアナログスイッチ1505を使用するのは以下の理由による。例えばフルハイビジョン表示装置の場合ソース信号線は1920xRGBの5760本存在する。ソースドライバを同一基板上に形成しない場合は、この端子にそれぞれソースドライバの端子が接続される。そのため、機械的な衝撃などにより、端子の接触不良が発生しやすいという問題があった。端子を減らすことが接触不良低減に有効である。そこでアナログスイッチアレイを同一基板上に形成し、RGBの各端子を時分割で選択的にソースドライバに接続し、端子数を減らすことを目的としている。
図6にソースドライバを内蔵した表示装置の実施形態を示す。図6(A)に示すのはガラス基板1701上に画素部1702、ゲートドライバ1703、1704、ソースドライバ1705を内蔵した例である。ゲートドライバ1703、1704、ソースドライバ1705にはFPC1706、1707より信号が供給される。ゲートドライバ1703、1704を表示装置の左右両側に配置し、画素を駆動することによって、片側の場合の半分の駆動能力で駆動することが可能である。
ソース線駆動にアナログスイッチを使用した場合の計算結果を以下に示す。計算は表示装置を100インチの液晶表示装置、フレーム周波数を240Hz(4倍速)の場合を想定している。前述したように4倍速ではソース線の書き込みを0.7μs以下でおこなう必要がある。このときのサンプリング用アナログスイッチに用いるトランジスタ素子サイズはL/W=3μm/1500μm、電界効果移動度は100cm2/Vs、しきい値1.5Vとした。そして、ソース信号線のシート抵抗を0.01Ω/□、ソース線抵抗を2.08KΩ、ソース線容量を18.5pF、線幅6μmとした。そしてソース線電位が期待値の99.9%まで書き込みができることを目標としている。
また、ソース線駆動にシフトレジスタ型ソースドライバを使用した場合の計算結果を示す。シフトレジスタは図9に示すようなセットリセット型のシフトレジスタを用いた。また、ソースドライバは図6(B)に示すような配置を仮定し駆動をおこなうものとした。サンプリングは960点同時サンプリングとしている。フルハイビジョンの4分の1の領域を1つのソースドライバで書き込むため、サンプリングすべき点は960xRGB=2880点である。これを960点同時サンプリングするため必要なシフトレジスタの段数は30段となる。そのタイミングチャートを図10(A)に示す。また図10(A)にて設定される期間を図10(B)に示す。ソースドライバのクロック周波数は図10(B)のBの期間の2倍の逆数にあたる。
本実施の形態では、トランジスタの作製例の一例を図1、図2、及び図3を用いて示す。
より金属導電膜を形成した後、フォトリソグラフィ工程によりレジストマスクを形成し、
選択的にエッチングを行って金属電極層を形成する。
実施の形態5は、第1の酸化物部材と第2の酸化物部材に同一成分を含む酸化物半導体材料を用いる場合を示したが、本実施の形態では異なる成分の酸化物半導体材料を用いる場合を示す。
本実施の形態では、c軸配向した結晶層を有する積層酸化物材料を含むトランジスタを作製し、該トランジスタを画素部、さらには駆動回路に用いて表示機能を有する半導体装置(表示装置ともいう)を作製する場合について説明する。また、トランジスタを、駆動回路の一部または全体を、画素部と同一基板上に形成し、システムオンパネルを形成することができる。
半導体装置の一形態に相当する発光表示パネル(発光パネルともいう)の外観及び断面について、図19を用いて説明する。図19(A)は、第1の基板上に形成されたc軸配向した結晶層を有する積層酸化物材料を含むトランジスタ及び発光素子を、第2の基板との間にシール材によって封止した、パネルの平面図であり、図19(B)は、図19(A)のH−Iにおける断面図に相当する。
半導体装置の一形態として電子ペーパーの例を示す。
含む)とする。
あるため、電波発信源から表示機能付き半導体装置(単に表示装置、又は表示装置を具備する半導体装置ともいう)を遠ざけた場合であっても、表示された像を保存しておくことが可能となる。
である。
本明細書に開示する半導体装置は、さまざまな電子機器(遊技機も含む)に適用することができる。電子機器としては、例えば、テレビジョン装置(テレビ、またはテレビジョン受信機ともいう)、コンピュータ用などのモニタ、デジタルカメラ、デジタルビデオカメラ、デジタルフォトフレーム、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯型ゲーム機、携帯情報端末、音響再生装置、パチンコ機などの大型ゲーム機などが挙げられる。
401 ゲート電極層
402 ゲート絶縁層
403 第1の酸化物半導体層
404 第2の酸化物半導体層
405a ソース電極層
405b ドレイン電極層
407 酸化物絶縁層
430 酸化物半導体積層
431 島状の酸化物半導体積層
432 酸化物半導体積層
470 トランジスタ
500 下地部材
501 第1の酸化物結晶部材
502 酸化物半導体層
503a 酸化物結晶部材
503b 酸化物結晶部材
504 非晶質を含む層
520 下地部材
531 酸化物結晶部材
532 酸化物部材
533a 酸化物結晶部材
533b 酸化物結晶部材
580 基板
581 トランジスタ
583 絶縁層
585 絶縁層
587 電極層
588 電極層
589 球形粒子
590a 黒色領域
590b 白色領域
594 キャビティ
595 充填材
596 基板
1501 ガラス基板
1502 画素部
1503 ゲートドライバ
1504 ゲートドライバ
1505 アナログスイッチ
1506 FPC
1507 FPC
1508 FPC
1509 FPC
1701 ガラス基板
1702 画素部
1703 ゲートドライバ
1704 ゲートドライバ
1705 ソースドライバ
1706 FPC
1707 FPC
1711 ガラス基板
1712 画素部
1713 ゲートドライバ
1714 ゲートドライバ
1715 ゲートドライバ
1716 ゲートドライバ
1717 ソースドライバ
1718 ソースドライバ
1719 ソースドライバ
1720 ソースドライバ
1721 FPC
1722 FPC
1723 FPC
1724 FPC
2700 電子書籍
2701 筐体
2703 筐体
2705 表示部
2707 表示部
2711 軸部
2721 電源
2723 操作キー
2725 スピーカ
2800 筐体
2801 筐体
2802 表示パネル
2803 スピーカー
2804 マイクロフォン
2805 操作キー
2806 ポインティングデバイス
2807 カメラ用レンズ
2808 外部接続端子
2810 太陽電池セル
2811 外部メモリスロット
3001 本体
3002 筐体
3003 表示部
3004 キーボード
3021 本体
3022 スタイラス
3023 表示部
3024 操作ボタン
3025 外部インターフェイス
3051 本体
3053 接眼部
3054 操作スイッチ
3055 表示部(B)
3056 バッテリー
3057 表示部(A)
4001 基板
4002 画素部
4003 信号線駆動回路
4004 走査線駆動回路
4005 シール材
4006 基板
4008 液晶層
4010 トランジスタ
4011 トランジスタ
4013 液晶素子
4015 接続端子電極
4016 端子電極
4018 FPC
4019 異方性導電層
4020 絶縁層
4021 絶縁層
4030 画素電極層
4031 対向電極層
4032 絶縁層
4033 絶縁層
4035 スペーサー
4040 導電層
4501 基板
4502 画素部
4503a 信号線駆動回路
4503b 信号線駆動回路
4504a 走査線駆動回路
4504b 走査線駆動回路
4505 シール材
4506 基板
4507 充填材
4509 トランジスタ
4510 トランジスタ
4511 発光素子
4512 電界発光層
4513 電極層
4515 接続端子電極
4516 端子電極
4517 電極層
4518a FPC
4518b FPC
4519 異方性導電層
4520 隔壁
4540 導電層
4541 絶縁層
4544 絶縁層
9600 テレビジョン装置
9601 筐体
9603 表示部
9605 スタンド
9607 表示部
9609 操作キー
9610 リモコン操作機
Claims (4)
- 絶縁基板上に複数の画素と複数の信号線、及び複数の走査線を有するアクティブマトリクス型表示装置であり、
前記絶縁基板上に、電界効果移動度が少なくとも50cm2/Vs以上であるトランジスタを有し、
前記トランジスタを1つの構成要素とするゲートドライバ、及びソース線駆動アナログスイッチを有し、
前記トランジスタは、酸化物半導体層を有し、
前記酸化物半導体層は、ゲート絶縁層を介してゲート電極層と重なるチャネル形成領域を少なくとも有し、
前記酸化物半導体層は、第1の金属酸化物層と、第2の金属酸化物層とが積層され、
前記第1の金属酸化物層は、前記第1の金属酸化物層の表面に対して垂直な方向に沿うようにc軸配向した結晶を有し、
前記第2の金属酸化物層は、前記第2の金属酸化物層の表面に対して垂直な方向に沿うようにc軸配向した結晶を有し、
前記第1の金属酸化物層の結晶構造の格子定数と、前記第2の金属酸化物層の結晶構造の格子定数との、ミスマッチは1%以下であることを特徴とする表示装置。 - 絶縁基板上に複数の画素と複数の信号線、及び複数の走査線を有するアクティブマトリクス型表示装置であり、
前記絶縁基板上に、電界効果移動度が100cm2/Vs以上であるトランジスタを有し、
前記トランジスタを1つの構成要素とするゲートドライバ、及びソース線駆動アナログスイッチを有し、
前記トランジスタは、酸化物半導体層を有し、
前記酸化物半導体層は、ゲート絶縁層を介してゲート電極層と重なるチャネル形成領域を少なくとも有し、
前記酸化物半導体層は、第1の金属酸化物層と、第2の金属酸化物層とが積層され、
前記第1の金属酸化物層は、前記第1の金属酸化物層の表面に対して垂直な方向に沿うようにc軸配向した結晶を有し、
前記第2の金属酸化物層は、前記第2の金属酸化物層の表面に対して垂直な方向に沿うようにc軸配向した結晶を有し、
前記第1の金属酸化物層の結晶構造の格子定数と、前記第2の金属酸化物層の結晶構造の格子定数との、ミスマッチは1%以下であることを特徴とする表示装置。 - 請求項1または2において、
前記酸化物半導体層は、Inと、Gaと、Znと、を有することを特徴とする表示装置。 - 請求項1乃至3のいずれか一において、
前記ゲートドライバ、及び前記ソース線駆動アナログスイッチは、同一絶縁基板上に設けられていることを特徴とする表示装置。
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