JP2008209939A - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- JP2008209939A JP2008209939A JP2008087107A JP2008087107A JP2008209939A JP 2008209939 A JP2008209939 A JP 2008209939A JP 2008087107 A JP2008087107 A JP 2008087107A JP 2008087107 A JP2008087107 A JP 2008087107A JP 2008209939 A JP2008209939 A JP 2008209939A
- Authority
- JP
- Japan
- Prior art keywords
- tft
- light
- light emitting
- display
- gate
- 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.)
- Granted
Links
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—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
- 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
-
- 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]
- G09G3/3225—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] using an active matrix
- G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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Abstract
【解決手段】表示部と、センサ部とを有する表示装置であって、前記表示部は複数の表示用画素を有しており、前記複数の表示用画素は、スイッチング用TFT、電流制御用TFT、及び発光素子をそれぞれ有しており、前記センサ部は、第1のTFT、第2のTFT、及び受光ダイオードをそれぞれ有しており、前記スイッチング用TFTは前記電流制御用TFTの駆動を制御し、前記電流制御用TFTは前記発光素子の発光を制御する前記複数の表示用画素がそれぞれ有する発光素子の輝度が制御される表示装置。
【選択図】図3
Description
特に有機化合物層の劣化が著しい色に対応するセンサ用画素をセンサ部に設けることは、所望の色を有する画像を表示するのに有効である。
白色発光の発光素子を用いたカラー化表示方式を用いることも可能である。また本実施の形態では、センサ部106がRGBにそれぞれ対応した3つのセンサ用画素を有しているが、本発明はこれに限定されない。RGBのうち、1つ又は2つの色に対応するセンサ用画素のみを設けるようにしても良い。
にデジタルビデオ信号が入力される。デジタルビデオ信号は「0」または「1」の情報を有しており、「0」と「1」のデジタルビデオ信号は、一方がHi(High)、一方がLo(Low)の電圧を有する信号である。
にデジタルビデオ信号が入力される。ソース信号線(S1〜Sx)に入力されたデジタルビデオ信号は、ONの状態のスイッチング用TFTを介して、該スイッチング用TFTのソース領域又はドレイン領域に接続された電流制御用TFTのゲート電極に入力される。
例えば本実施例の場合、Rセンサ用画素304aと、Gセンサ用画素304bと、Bセンサ用画素304cとからそれぞれ出力されている3つのセンサ出力信号が、演算回路403に入力されている。演算回路403では、各色に対応する画素(表示用画素及びセンサ用画素)に所望の高さの電位を有するアナログビデオ信号がサンプリングされて入力されるように、デジタルビデオ信号を補正する。
なお、n型不純物元素としては、代表的には周期表の15族に属する元素、典型的にはリン又は砒素を用いることができる。なお、本実施例ではフォスフィン(PH3)を質量分離しないでプラズマ励起したプラズマドーピング法を用い、リンを1×1018atoms/cm3の濃度で添加する。勿論、質量分離を行うイオンインプランテーション法を用いても良い。
を添加して高濃度にリンを含むn型不純物領域(a)525〜529を形成する。ここでもフォスフィン(PH3)を用いたイオンドープ法で行い、この領域のリンの濃度は1×1020〜1×1021atoms/cm3(代表的には2×1020〜5×1021atoms/cm3)となるように調節する。
こうして有機材料でなる被膜(発光層)が形成される。
本実施例では、赤色に発光する発光層としてシアノポリフェニレンビニレン、緑色に発光する発光層としてポリフェニレンビニレン、青色に発光する発光層としてポリアルキルフェニレンを各々50nmの厚さに形成する。また、溶媒としては1,2−ジクロロメタンを用い、80〜150℃のホットプレートで1〜5分の熱処理を行って揮発させる。
その場合は、蒸着法を用いて形成すれば良い。
、ゲート信号線G(G1〜Gyのいずれか1つ)を含んでいる。
スイッチング用TFTと電流制御用TFTは、nチャネル型TFTでもpチャネル型TFTでも、どちらでも構わない。またリセット用TFT734とバッファ用TFT735は、互いに極性が異なっていれば、nチャネル型TFTでもpチャネル型TFTでも良い。またセンサTFT736はバッファ用TFT735と極性が同じであれば、nチャネル型TFTでもpチャネル型TFTでも良い。
また、LDD領域815a〜815dの長さ(幅)は0.5〜3.5μm、代表的には2.0〜2.5μmとすれば良い。
勿論、nチャネル型TFTであるバッファ用TFT735、センサ用TFT736と同様にLDD領域を設け、ホットキャリア対策を講じることも可能である。
従って、膜厚は0.5〜5μm(好ましくは1.5〜2.5μm)が好ましい。
を開けた後、形成された開孔部において電流制御用TFT731のドレイン配線832に接続されるように形成される。また、860は透明導電膜でなるセンサ用配線であり、第2層間絶縁膜851及び第1パッシベーション膜849にコンタクトホール(開孔)を開けた後、形成された開孔部においてセンサTFT736のソース配線885に接続されるように、画素電極852と同時に形成される。なお、図16のように画素電極852とドレイン領域827とが直接接続されないようにしておくと、有機化合物層のアルカリ金属が画素電極を経由して活性層へ侵入することを防ぐことができる。
、エポキシ樹脂、シリコーン樹脂、PVB(ポリビニルブチラル)またはEVA(エチレンビニルアセテート)を用いることができる。この充填材6004の内部に乾燥剤を設けておくと、吸湿効果を保持できるので好ましい。
板、PVF(ポリビニルフルオライド)フィルム、マイラーフィルム、ポリエステルフィルムまたはアクリルフィルムを用いることができる。なお、充填材6004としてPVBやEVAを用いる場合、数十μmのアルミニウムホイルをPVFフィルムやマイラーフィルムで挟んだ構造のシートを用いることが好ましい。
、(B)と同じ番号のものは同じ部分を指しているので説明は省略する。
板、PVF(ポリビニルフルオライド)フィルム、マイラーフィルム、ポリエステルフィルムまたはアクリルフィルムを用いることができる。なお、充填材6004としてPVBやEVAを用いる場合、数十μmのアルミニウムホイルをPVFフィルムやマイラーフィルムで挟んだ構造のシートを用いることが好ましい。
なお、電流制御用TFT3503のドレインは電源供給線(電源線)3506に接続され、常に一定の電圧が加えられている。
では、保持容量3504の位置を明確にするために一部バンクを省略しており、バンク44a、44bしか図示していないが、電源供給線3506とソース配線34を一部覆うように、画素間に設けられている。また、ここでは二画素しか図示していないが、R(赤)、G(緑)、B(青)の各色に対応した発光層を作り分けても良い。発光層とする有機材料としてはπ共役ポリマー系材料を用いる。代表的なポリマー系材料としては、ポリパラフェニレンビニレン(PPV)系、ポリビニルカルバゾール(PVK)系、ポリフルオレン系などが挙げられる。
この場合、電源供給線3808とゲート信号線3803とで専有面積を共有させることができるため、表示部をさらに高精細化することができる。
の輝度を検知し、その外光の輝度に合わせて、発光素子の輝度の補正を行っても良い。例えば外光の輝度が高い場合発光素子の輝度を低くするように補正し、逆に外光の輝度が低い場合発光素子の輝度を高くするように補正する。
であり、本体2301、記録媒体(DVD等)2302、操作スイッチ2303、表示装置(a)2304、表示装置(b)2305、センサ部2306等を含む。表示装置(a)2304は主として画像情報を表示し、表示装置(b)2305は主として文字情報を表示するが、本発明はこれら表示装置(a)、(b)
2304、2305及びセンサ部2306に用いることができる。なお、記録媒体を備えた画像再生装置には家庭用ゲーム機器なども含まれる。
なお図23(E)では、センサ部2404をアーム部2403に設けたが、本発明はこれに限定されなく、表示装置2402と並べて設けても良い。
102 ソース信号線駆動回路
102a シフトレジスタ
102b ラッチ(A)
102c ラッチ(B)
103 ゲート信号線駆動回路
104 センサ部
104a Rセンサ用画素
104b Gセンサ用画素
104c Bセンサ用画素
105 表示用画素
Claims (19)
- 表示部と、センサ部とを有する表示装置であって、
前記表示部は複数の表示用画素を有しており、
前記複数の表示用画素は、スイッチング用TFT、電流制御用TFT、及び発光素子をそれぞれ有しており、
前記センサ部は、第1のTFT、第2のTFT、及び受光ダイオードをそれぞれ有しており、
前記スイッチング用TFTは前記電流制御用TFTの駆動を制御し、
前記電流制御用TFTは前記発光素子の発光を制御し、
前記第2のTFTは、ゲートと、定電流源に電気的に接続されたソースと、一定の電位に保たれているドレインとを有しており、
前記第1のTFTのソースまたはドレインのいずれか一方は前記第2のTFTのドレインと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第2のTFTのゲートと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記受光ダイオードと電気的に接続しており、
前記第1のTFTがオンの時、前記第2のTFTのゲートと前記第2のTFTのドレインの電位は等しくなり、
前記第1のTFTがオフの時、前記受光ダイオードを流れる電流に応じて前記第2のTFTのゲートの電位が変化することによって、前記複数の表示用画素がそれぞれ有する発光素子の輝度が制御されることを特徴とする表示装置。 - 表示部と、センサ部とを有する表示装置であって、
前記表示部は複数の表示用画素を有しており、
前記複数の表示用画素は、スイッチング用TFT、電流制御用TFT、及び発光素子をそれぞれ有しており、
前記センサ部は、第1のTFT、第2のTFT、及び受光ダイオードをそれぞれ有しており、
前記スイッチング用TFTは前記電流制御用TFTの駆動を制御し、
前記電流制御用TFTは前記発光素子の発光を制御し、
前記第2のTFTは、ゲートと、定電流源に電気的に接続されたソースと、一定の電位に保たれているドレインとを有しており、
前記第1のTFTのソースまたはドレインのいずれか一方は前記第2のTFTのドレインと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第2のTFTのゲートと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記受光ダイオードと電気的に接続しており、
前記第1のTFTがオンの時、前記第2のTFTのゲートと前記第2のTFTのドレインの電位は等しくなり、
前記第1のTFTがオフの時、前記受光ダイオードを流れる電流に応じて前記第2のTFTのゲートの電位が変化することによって、前記複数の表示用画素がそれぞれ有する発光素子の輝度が制御され、
前記第2のTFTのソースは、補正回路と接続され、
前記補正回路は、A/D変換回路と、演算回路と、補正メモリと、前記演算回路により補正されたデジタルの補正信号がアナログに変換されるD/A変換回路とを有し、
前記A/D変換回路は前記第2のTFTから出力されたセンサ出力信号をデジタルのセンサ出力信号に変換し、
前記演算回路に前記デジタルのセンサ出力信号が入力され、
前記補正メモリに記憶されている補正基準データと前記デジタルのセンサ出力信号が前記演算回路で比較され、デジタルの補正信号が生成され、
前記デジタルの補正信号が前記D/A変換回路に入力され、アナログに変換され、発光素子用電源に入力されることを特徴とする表示装置。 - 表示部と、センサ部と、ソース信号線駆動回路と、ゲート信号線駆動回路とを有する表示装置であって、
前記表示部は複数の表示用画素を有しており、
前記複数の表示用画素は、スイッチング用TFT、電流制御用TFT、及び発光素子をそれぞれ有しており、
前記センサ部は、第1のTFT、第2のTFT、及び受光ダイオードをそれぞれ有しており、
前記ゲート信号線駆動回路から前記スイッチング用TFTが有するゲート電極に入力される信号によって、前記スイッチング用TFTの駆動が制御され、
前記ソース信号線駆動回路から前記スイッチング用TFTを介して前記電流制御用TFTが有するゲート電極に入力される信号によって、前記電流制御用TFTの駆動が制御され、
前記電流制御用TFTは前記発光素子の発光を制御し、
前記第2のTFTは、ゲートと、定電流源に電気的に接続されたソースと、一定の電位に保たれているドレインとを有しており、
前記第1のTFTのソースまたはドレインのいずれか一方は前記第2のTFTのドレインと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第2のTFTのゲートと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記受光ダイオードと電気的に接続しており、
前記第1のTFTがオンの時、前記第2のTFTのゲートと前記第2のTFTのドレインの電位は等しくなり、
前記第1のTFTがオフの時、前記受光ダイオードを流れる電流に応じて前記第2のTFTのゲートの電位が変化することによって、前記複数の表示用画素がそれぞれ有する発光素子の輝度が制御されることを特徴とする表示装置。 - 請求項1乃至請求項3のいずれか1項において、
前記発光素子は、赤色、青色又は緑色に発光することを特徴とする表示装置。 - 請求項1乃至請求項4のいずれか1項において、
前記第1のTFTはnチャネル型TFTであり、前記第2のTFTはpチャネル型TFTであることを特徴とする表示装置。 - 請求項1乃至請求項4のいずれか1項において、
前記第1のTFTはpチャネル型TFTであり、前記第2のTFTはnチャネル型TFTであることを特徴とする表示装置。 - 請求項1乃至請求項6のいずれか1項において、
前記受光ダイオードによって外光の輝度を検知することを特徴とする表示装置。 - 表示部と、センサ部とを有する表示装置であって、
前記表示部は複数の表示用画素を有しており、
前記複数の表示用画素は、スイッチング用TFT、電流制御用TFT、及び発光素子をそれぞれ有しており、
前記センサ部は、第1のTFT、第2のTFT、及び第3のTFTをそれぞれ有しており、
前記スイッチング用TFTは前記電流制御用TFTの駆動を制御し、
前記電流制御用TFTは前記発光素子の発光を制御し、
前記第3のTFTは常にオフになっており、
前記第2のTFTは、ゲートと、定電流源に電気的に接続されたソースと、一定の電位に保たれているドレインとを有しており、
前記第1のTFTのソースまたはドレインのいずれか一方は前記第2のTFTのドレインと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第2のTFTのゲートと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第3のTFTのドレインと電気的に接続しており、
前記第1のTFTがオンの時、前記第2のTFTのゲートと前記第2のTFTのドレインの電位は等しくなり、
前記第1のTFTがオフの時、前記第3のTFTを流れるオフ電流に応じて前記第2のTFTのゲート電極の電位が変化することによって、前記複数の表示用画素がそれぞれ有する発光素子の輝度が制御されることを特徴とする表示装置。 - 表示部と、センサ部と、ソース信号線駆動回路と、ゲート信号線駆動回路とを有する表示装置であって、
前記表示部は複数の表示用画素を有しており、
前記複数の表示用画素は、スイッチング用TFT、電流制御用TFT、及び発光素子をそれぞれ有しており、
センサ部は、第1のTFT、第2のTFT、及び第3のTFTをそれぞれ有しており、
前記ゲート信号線駆動回路から前記スイッチング用TFTが有するゲート電極に入力される信号によって、前記スイッチング用TFTが駆動し、
前記ソース信号線駆動回路から前記スイッチング用TFTを介して前記電流制御用TFTが有するゲート電極に入力される信号によって、前記電流制御用TFTの駆動が制御され、
前記電流制御用TFTは前記発光素子の発光を制御し、
前記第3のTFTは常にオフになっており、
前記第2のTFTは、ゲートと、定電流源に電気的に接続されたソースと、一定の電位に保たれているドレインとを有しており、
前記第1のTFTのソースまたはドレインのいずれか一方は前記第2のTFTのドレインと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第2のTFTのゲートと電気的に接続しており、
前記第1のTFTのソースまたはドレインのいずれか他方は前記第3のTFTドレインと電気的に接続しており、
前記第1のTFTがオンの時、前記第2のTFTのゲートと前記第2のTFTのドレインの電位は等しくなり、
前記第1のTFTがオフの時、前記第3のTFTを流れるオフ電流に応じて前記第2のTFTのゲート電極の電位が変化することによって、前記複数の表示用画素がそれぞれ有する発光素子の輝度が制御されることを特徴とする表示装置。 - 請求項8または請求項9において、
前記発光素子は、赤色、青色又は緑色に発光することを特徴とする表示装置。 - 請求項8乃至請求項10のいずれか1項において、
前記第1のTFTはnチャネル型TFTであり、前記第2のTFTはpチャネル型TFTであり、前記第3のTFTはpチャネル型TFTであることを特徴とする表示装置。 - 請求項8乃至請求項10のいずれか1項において、
前記第1のTFTはpチャネル型TFTであり、前記第2のTFTはnチャネル型TFTであり、前記第3のTFTはnチャネル型TFTであることを特徴とする表示装置。 - 請求項8乃至請求項12のいずれか1項において、
前記第3のTFTはボトムゲート型薄膜トランジスタであることを特徴とする表示装置。 - 請求項1乃至請求項13のいずれか1項において、
前記発光素子は、陽極と陰極との間に有機化合物層を有しており、前記有機化合物層は低分子系有機物質またはポリマー系有機物質を有することを特徴とする表示装置。 - 請求項14において、
前記低分子系有機物質は、Alq3(トリス−8−キノリライト−アルミニウム)またはTPD(トリフェニルアミン誘導体)からなることを特徴とする表示装置。 - 請求項14において、
前記ポリマー系有機物質は、PPV(ポリフェニレンビニレン)、PVK(ポリビニルカルバゾール)またはポリカーボネートからなることを特徴とする表示装置。 - 請求項14において、
前記陽極は、酸化インジウムと酸化スズとの化合物、または酸化インジウムと酸化亜鉛との化合物でなる透明導電膜であることを特徴とする表示装置。 - 請求項8乃至請求項17のいずれか1項において、
前記受第3のTFTによって外光の輝度を検知することを特徴とする表示装置。 - 請求項1乃至請求項18のいずれか1項に記載の前記表示装置とキーボード又は操作スイッチを用いることを特徴とするコンピュータ、ビデオカメラ、デジタルカメラ、ナビゲーションシステム、音響再生装置、ゲーム機器、携帯情報端末、または画像再生装置。
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US20070114532A1 (en) | 2007-05-24 |
US7629610B2 (en) | 2009-12-08 |
US6828951B2 (en) | 2004-12-07 |
US20050056841A1 (en) | 2005-03-17 |
US20020180672A1 (en) | 2002-12-05 |
US7173279B2 (en) | 2007-02-06 |
US20010028060A1 (en) | 2001-10-11 |
US20080272374A1 (en) | 2008-11-06 |
JP4620140B2 (ja) | 2011-01-26 |
US6424326B2 (en) | 2002-07-23 |
US7397064B2 (en) | 2008-07-08 |
TW480727B (en) | 2002-03-21 |
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