JP2009543123A - アクティブ・マトリックス・ディスプレイの補償 - Google Patents
アクティブ・マトリックス・ディスプレイの補償 Download PDFInfo
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- 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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- 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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
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- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0847—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory without any storage capacitor, i.e. with use of parasitic capacitances as storage elements
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- G—PHYSICS
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- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G09G2320/02—Improving the quality of display appearance
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
- G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
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- G—PHYSICS
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- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
a)それぞれの画素駆動回路はデータ線と電力供給線に電気的に接続されていて、ソース電極とドレイン電極とゲート電極を有する駆動用トランジスタと、ソース電極とドレイン電極とゲート電極を有するスイッチング用トランジスタとを備え;
b)各駆動用トランジスタのソース電極とドレイン電極の一方は、対応する電力供給線に電気的に接続され、他方は、対応するOLED発光画素に電気的に接続され;
c)各スイッチング用トランジスタのソース電極とドレイン電極の一方は、対応する駆動用トランジスタのゲート電極に電気的に接続され、他方は、対応するデータ線に電気的に接続され;
d)正または負の第1の電圧を電力供給線に印加して駆動用トランジスタに第1の方向の電流を流すことにより、信号電圧に応答してOLED発光画素に光を発生させる第1の手段と;
e)第1の電圧とは極性が逆の第2の電圧を電力供給線に印加し、駆動用トランジスタに第1の方向とは逆の第2の方向の電流を、その駆動用トランジスタのゲート電極の電位によってその駆動用トランジスタがオフになるまで流す第2の手段と;
f)データ線上に、それぞれが駆動用トランジスタのゲート電極上の対応する電位の関数である複数の閾値電圧関連信号を発生させる第3の手段と;
g)その複数の閾値電圧関連信号に応答して1つの閾値電圧関連信号を生成させる第4の手段と;
h)その1つの閾値電圧関連信号に応答して負荷電圧を選択する第5の手段とを備える装置によって達成される。
Vgp/Vgo = Cgo/Cgp (式1)
Vgate = PVDD2 + Vth (式2)
Vout = f(Vゲート) (式3)
Vth = f-1 (Vout) - PVDD2 (式4)
Vゲート= PVDD3 - VthCgp/Cgo (式5)
ここに、PVDD3は、電力供給線110に印加される第3の電圧(例えばこの例ではゼロ)を表わす。この場合、閾値電圧は、測定された電圧から以下のように計算できる。
Vth = -Cgo (f-1(Vout) - PVDD3)/Cgp (式6)
調節値 = Vth - Vthi (式7)
である。ここにVthiは、トランジスタの初期閾値電圧を表わす。
105 画素駆動回路
110 電力供給線
120 データ線
130 選択線
130A 選択線
130B 選択線
140 OLED発光画素
145 ドレイン電極
150 グラウンド
155 ソース電極
160 OLED発光画素
165 ゲート電極
170 駆動用トランジスタ
180 スイッチング用トランジスタ
185 ソース電極またはドレイン電極
190 キャパシタ
195 ゲート電極
200 画素駆動回路
200A 画素駆動回路
200B 画素駆動回路
210 駆動用トランジスタ
215 ゲート電極
220 キャパシタ
230 キャパシタ
250 OLEDディスプレイ
260 電圧源
265 スイッチ
270 電圧源
280 ディジタル/アナログ変換器
285 スイッチ
315 プロセッサ
360 サンプリング・保持素子
365 負荷電圧源
370 電圧比較回路
375 負荷電圧源
380 電圧選択スイッチ
385 積分器線
385A 積分器線
390 積分器
395 電圧選択スイッチ
410 ブロック
420 ブロック
430 ブロック
440 ブロック
445 ブロック
450 ブロック
460 ブロック
470 ブロック
475 判断ブロック
480 ブロック
485 判断ブロック
490 ブロック
510 ブロック
530 ブロック
540 ブロック
550 ブロック
555 ブロック
560 ブロック
570 ブロック
610 曲線
620 閾値電圧
Claims (10)
- アレイ状に配置された複数のOLED発光画素を有するアクティブ・マトリックスOLEDディスプレイに含まれる画素駆動回路の駆動用トランジスタの閾値電圧(Vth)の変化を補償するための負荷電圧を選択する装置であって、
a)それぞれの画素駆動回路はデータ線と電力供給線に電気的に接続されていて、ソース電極とドレイン電極とゲート電極を有する駆動用トランジスタと、ソース電極とドレイン電極とゲート電極を有するスイッチング用トランジスタとを備え;
b)各駆動用トランジスタのソース電極とドレイン電極の一方は、対応する電力供給線に電気的に接続され、他方は、対応するOLED発光画素に電気的に接続され;
c)各スイッチング用トランジスタのソース電極とドレイン電極の一方は、対応する駆動用トランジスタのゲート電極に電気的に接続され、他方は、対応するデータ線に電気的に接続され;
d)正または負の第1の電圧を電力供給線に印加して上記駆動用トランジスタに第1の方向の電流を流すことにより、信号電圧に応答して上記OLED発光画素に光を発生させる第1の手段と;
e)第1の電圧とは極性が逆の第2の電圧を上記電力供給線に印加し、上記駆動用トランジスタに第1の方向とは逆の第2の方向の電流を、その駆動用トランジスタのゲート電極の電位によってその駆動用トランジスタがオフになるまで流す第2の手段と;
f)上記データ線上に、それぞれが上記駆動用トランジスタのゲート電極上の対応する電位の関数である複数の閾値電圧関連信号を発生させる第3の手段と;
g)その複数の閾値電圧関連信号に応答して1つの閾値電圧関連信号を生成させる第4の手段と;
h)その1つの閾値電圧関連信号に応答して負荷電圧を選択する第5の手段とを備える装置。 - 上記OLED発光画素が非反転OLED画素であり、第1の電圧がグラウンド値に対して正である、請求項1に記載の装置。
- 上記OLED発光画素が反転OLED画素であり、第1の電圧がグラウンド値に対して負である、請求項1に記載の装置。
- 上記駆動用トランジスタと上記スイッチング用トランジスタがn型トランジスタである、請求項1に記載の装置。
- 上記駆動用トランジスタと上記スイッチング用トランジスタがp型トランジスタである、請求項1に記載の装置。
- i)選択された駆動用トランジスタのゲート電極に上記閾値電圧関連信号に基づく負荷電圧を選択的に印加してその駆動用トランジスタの閾値電圧の範囲を狭くする第6の手段をさらに備える、請求項1に記載の装置。
- 上記閾値電圧関連信号に基づき、単一の負荷電圧が選択されて印加されるか、印加されない、請求項6に記載の装置。
- 上記閾値電圧関連信号に基づき、複数ある負荷電圧のうちの1つが選択されて印加される、請求項6に記載の装置。
- 各駆動用トランジスタの信号電圧に対する調節値がさらに提供され、初期閾値電圧からのその調節値がすべての駆動用トランジスタで同じである、請求項1に記載の装置。
- 上記閾値電圧関連信号が決定され、上記負荷電圧がディスプレイの各行について選択される、請求項1に記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/427,139 | 2006-06-28 | ||
US11/427,139 US7642997B2 (en) | 2006-06-28 | 2006-06-28 | Active matrix display compensation |
PCT/US2007/013999 WO2008002401A2 (en) | 2006-06-28 | 2007-06-14 | Active matrix display compensation |
Publications (2)
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JP2009543123A true JP2009543123A (ja) | 2009-12-03 |
JP5129247B2 JP5129247B2 (ja) | 2013-01-30 |
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JP2009518150A Active JP5129247B2 (ja) | 2006-06-28 | 2007-06-14 | アクティブ・マトリックス・ディスプレイの補償 |
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Country | Link |
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US (1) | US7642997B2 (ja) |
EP (1) | EP2033177B1 (ja) |
JP (1) | JP5129247B2 (ja) |
WO (1) | WO2008002401A2 (ja) |
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JP2009104104A (ja) * | 2007-05-30 | 2009-05-14 | Canon Inc | アクティブマトリックスディスプレイおよびその駆動方法 |
KR101082302B1 (ko) * | 2009-07-21 | 2011-11-10 | 삼성모바일디스플레이주식회사 | 유기전계발광 표시장치 및 그의 구동방법 |
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JP5910543B2 (ja) * | 2013-03-06 | 2016-04-27 | ソニー株式会社 | 表示装置、表示駆動回路、表示駆動方法、および電子機器 |
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