JP2007323037A - 有機電界発光表示装置及びその駆動方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims description 15
- 238000005401 electroluminescence Methods 0.000 title abstract description 5
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- 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
- G09G3/3258—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 voltage across the light-emitting element
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- 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
-
- 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
- G09G3/2007—Display of intermediate tones
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
- G09G3/2025—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having all the same time duration
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
【解決手段】走査信号が伝達される複数の走査線、デジタルデータ信号が伝達される複数のデータ線、発光制御信号が伝達される複数の発光制御線及び電源を供給する複数の電源供給線によって定義される複数の画素を含み、前記走査信号は複数のサブフレームごとに伝達して、前記発光制御信号は複数のサブフレームごとに互いに異なる周波数を持つ。
【選択図】図6
Description
図1を参照して説明すれば、画素はデータ線Dmと走査線Snが交差される領域に形成されて第1トランジスタT11、第2トランジスタT21、キャパシタCst、補償回路11及び有機発光素子OLEDを含み、走査線Snによって走査信号の伝達を受けて選択されて選択された画素にデータ線Dmを通じてデータ信号が伝達されてデータ信号に対応した輝度を表現する。そして、各画素は、第1電源ELVddと第2電源ELVssの伝達を受けて動作する。
図2を参照して説明すれば、画素は第1トランジスタT12、第2トランジスタT22、第3トランジスタT32、第4トランジスタT42、キャパシタCst及び有機発光素子OLEDを含み、電流を利用して輝度を調節する電流駆動型画素回路である。
図3は、本発明による有機電界発光表示装置の構造を示す構造図である。
図3を参照して説明すれば、有機電界発光表示装置は画素部100、データ駆動部200、走査駆動部300及び発光制御駆動部400を含む。
図4を参照して説明すれば、有機発光素子は高い周波数信号が伝達されれば、輝度を減殺させる反面、低い周波数が入力されればそのまま通過させる。これによって、有機発光素子OLEDは、入力される周波数信号が低い場合に高い輝度を示す反面、高い周波数である場合、低い輝度を示す。
図5を参照して説明すれば、画素は第1トランジスタM11、第2トランジスタM21、第3トランジスタM31、キャパシタCst及び有機発光素子OLEDを含み、第1ないし第3トランジスタM11ないしM31は、PMOSトランジスタに具現される。
図6を参照して説明すれば、有機発光素子で階調を表現するために一フレームの区間をnビットのデジタル信号に対応してn個のサブフレームSF1、SF2、SF3...SFnで区分する。この時、n個のサブフレームSF1、SF2、SF3...SFnは、発光制御信号ES1、ES2...ESn-1、ESnによって互いに異なる明るさに対応する階調を持って、第1ないし第nサブフレームSF1、SF2、SF3...SFnの明るさに対応する階調の割合は、20:21:22:23:24...2n になる。
そして、一フレームの中で第4サブフレームSF4ないし第nサブフレームSFnのそれぞれで同じ動作を遂行するようになって第1トランジスタM11によって生成された電流が発光制御信号ES4...ESnによって周波数を持つようになって"0"または"23"ないし"2n"階調に対応する明るさで発光するようになる。
すなわち、本発明の第2実施形態による画素とこれを持つ有機電界発光表示装置は、Nタイプのトランジスタで、走査信号と発光制御信号がハイ状態である時オン状態になってロー状態である時オフ状態になって、このような動作は当業者なら本発明の第1実施形態の説明だけでも本発明の第2実施形態を容易に実施することができるであろう。
200 データ駆動部
300 走査駆動部
400 発光制御駆動部
Claims (13)
- 走査信号が伝達される複数の走査線と、
デジタルデータ信号が伝達される複数のデータ線と、
発光制御信号が伝達される複数の発光制御線と、
電源を供給する複数の電源供給線によって定義される複数の画素を含み、
前記走査信号は複数のサブフレームごとに伝達されて、前記発光制御信号は複数のサブフレームごとに互いに異なる周波数を持つようにすることを特徴とする有機電界発光表示装置。 - 前記各画素は、
各サブフレームごとに互いに異なる明るさの合計によって所望の階調を表現することを特徴とする請求項1に記載の有機電界発光表示装置。 - 前記発光制御信号の周波数は、
前記デジタルデータ信号の最上位ビットに行くほどますます低くなることを特徴とする請求項1に記載の有機電界発光表示装置。 - 前記デジタルデータ信号は、
Nビットを持って、前記複数のサブフレームはN個で構成されることを特徴とする請求項1に記載の有機電界発光表示装置。 - 前記画素は、
各サブフレームごとに前記デジタルデータ信号の一つのビットに対応して動作することを特徴とする請求項1に記載の有機電界発光表示装置。 - 走査信号が伝達される複数の走査線とデジタルデータ信号が伝達される複数のデータ線と、発光制御信号が伝達される複数の発光制御線及び電源を供給する複数の電源供給線によって定義される複数の画素を含む画素部と、
前記データ線にnビットデジタルデータ信号の各ビットを伝達するデータ駆動部と、
前記走査線に複数のサブフレームごとに伝達される走査信号を伝達する走査駆動部と、
前記発光制御線に前記複数のサブフレームに対応して互いに異なる周波数を持つ発光制御信号を伝達する発光制御駆動部と、
を含むことを特徴とする有機電界発光表示装置。 - 前記各画素は、
各サブフレームごとに互いに異なる明るさの合計によって所望の階調を表現することを特徴とする請求項6に記載の有機電界発光表示装置。 - 前記発光制御信号の周波数は、
前記デジタルデータ信号の最上位ビットに行くほどますます低くなることを特徴とする請求項6に記載の有機電界発光表示装置。 - 前記複数のサブフレームは、
N個で構成されて、一つのサブフレームは前記デジタル信号の一つのビットに対応することを特徴とする請求項6に記載の有機電界発光表示装置。 - nビットデジタルデータ信号の各ビットのデジタルデータ信号に対応して電流を生成する第1段階と、
前記生成された電流をスイッチング動作を遂行して前記電流が前記スイッチング動作によってオンオフされるようにする第2段階と、
前記オンオフされる電流によって有機発光素子を発光させる第3段階と、
を含むことを特徴とする有機電界発光表示装置の駆動方法。 - 前記第2段階において、
前記スイッチング動作は、
前記nビットに対応するn個のサブフレームごとに互いに異なる周波数でスイッチング動作が遂行されることを特徴とする請求項10に記載の有機電界発光表示装置の駆動方法。 - 前記スイッチング動作の周波数は、
nビットデジタルデータ信号の最上位ビットに行くほどますます低くなることを特徴とする請求項11に記載の有機電界発光表示装置の駆動方法。 - 前記サブフレームごとに互いに異なる明るさを持つようにすることを特徴とする請求項11に記載の有機電界発光表示装置の駆動方法。
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KR1020060050485A KR100793557B1 (ko) | 2006-06-05 | 2006-06-05 | 유기전계발광표시장치 및 그의 구동방법 |
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EP (1) | EP1865486A3 (ja) |
JP (1) | JP2007323037A (ja) |
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KR20230167180A (ko) * | 2022-05-30 | 2023-12-08 | 삼성디스플레이 주식회사 | 표시 장치 |
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Also Published As
Publication number | Publication date |
---|---|
EP1865486A2 (en) | 2007-12-12 |
KR20070116440A (ko) | 2007-12-10 |
US20070279343A1 (en) | 2007-12-06 |
US7847768B2 (en) | 2010-12-07 |
EP1865486A3 (en) | 2010-04-28 |
KR100793557B1 (ko) | 2008-01-14 |
CN101086821A (zh) | 2007-12-12 |
CN101086821B (zh) | 2011-10-05 |
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