JP4838090B2 - パネル電流測定方法およびパネル電流測定装置 - Google Patents
パネル電流測定方法およびパネル電流測定装置 Download PDFInfo
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- JP4838090B2 JP4838090B2 JP2006280280A JP2006280280A JP4838090B2 JP 4838090 B2 JP4838090 B2 JP 4838090B2 JP 2006280280 A JP2006280280 A JP 2006280280A JP 2006280280 A JP2006280280 A JP 2006280280A JP 4838090 B2 JP4838090 B2 JP 4838090B2
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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
- G09G3/3233—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
-
- 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
- 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
-
- 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
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
-
- 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
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
-
- 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
- G09G2320/029—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
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Measurement Of Current Or Voltage (AREA)
- Tests Of Electronic Circuits (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Description
高電圧側から表示パネルに流れ込む流入電流と、低電圧側に向けて表示パネルから流れ出す流出電流を同時に測定し、得られた両方の測定結果を用いてパネル電流の値を求める場合に、流入電流の測定結果と、流出電流の測定結果の加算処理を行うことを特徴とする。
図4は、外部から商用電源のハム等のノイズが飛び込む様子を表している。PVdd電源ラインや有機EL素子のカソードはパネル全面にわたって配置されているので、外部のノイズを拾いやすく、これらのノイズは図5のようにパネルの各電流に重畳される。まず、有機EL素子に流れる電流は、駆動TFT1のゲート電圧によって決定されるため、基本的に電源電圧にはよらない。従って、1画素の電流iPixは図5に示されるように、点灯開始時間時間t0からデータ信号に応じた電流が流れる。一方、商用電源からの同様のノイズi1,i2がPVdd、CVに入り込み、PVddラインおよびCVラインには逆相で現れる。従って、iPVddと、iCVを加算することで、図6に示すように、ノイズが相殺され、2iPixが得られる。
iCV=iPix−a×N
iPVdd=iPix+b×N
と表すことができる。
b×iCV+a×iPVdd=b×iPix−ab×N+a×iPix+ab×N
=(a+b)×iPix
すなわち、基準電圧Vrを適切な値に設定することによって、A/Dコンバータ16に入力される電圧のDCオフセット値を適切な電圧(例えば、0V)に設定することができ、A/Dコンバータ16から、(R3×iCV+R4×iPVdd)R7/R5の電圧に対応するコードが得られるが、抵抗R3、R4の値をノイズの比率に応じて設定できていれば、ノイズが除去されて、駆動電流の(R3+R4)R7/R5倍の電圧に対応するコードが得られる。
Claims (3)
- アクティブマトリックス型有機EL表示パネルにおけるパネル電流測定方法であって、
1画素または複数画素を点灯した時に表示パネルに流れる電流を測定する際、
高電圧側から表示パネルに流れ込む流入電流と、低電圧側に向けて表示パネルから流れ出す流出電流を同時に測定し、
得られた両方の測定結果を用いてパネル電流の値を求める場合に、流入電流の測定結果と、流出電流の測定結果の加算処理を行うことを特徴とするパネル電流測定方法。 - 請求項1に記載のパネル電流測定方法において、
前記流入電流の測定結果と、流出電流の測定結果の加算処理は、重み付け加算であることを特徴とするパネル電流測定方法。 - アクティブマトリックス型の有機EL表示パネルにおけるパネル電流測定装置であって、
高電圧電源から前記表示パネルに流れ込む流入電流を測定する流入電流測定手段と、
低電圧電源に向けて表示パネルから流れ出す流出電流を測定する流出電流測定手段と、
同時に測定された流入電流と流出電流を加算する加算手段と、
を含み、
加算手段で得られる加算結果に基づいて、パネル電流を測定することを特徴とするパネル電流測定装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006280280A JP4838090B2 (ja) | 2006-10-13 | 2006-10-13 | パネル電流測定方法およびパネル電流測定装置 |
US11/865,843 US8217860B2 (en) | 2006-10-13 | 2007-10-02 | Method and device for measuring panel current |
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JP2006280280A JP4838090B2 (ja) | 2006-10-13 | 2006-10-13 | パネル電流測定方法およびパネル電流測定装置 |
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JP2008098057A JP2008098057A (ja) | 2008-04-24 |
JP4838090B2 true JP4838090B2 (ja) | 2011-12-14 |
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Families Citing this family (6)
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JP5443188B2 (ja) | 2010-02-04 | 2014-03-19 | グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー | 表示装置 |
TWI571049B (zh) * | 2012-03-12 | 2017-02-11 | 禾瑞亞科技股份有限公司 | 信號量測電路 |
JP6129318B2 (ja) * | 2013-07-30 | 2017-05-17 | シャープ株式会社 | 表示装置およびその駆動方法 |
KR101529005B1 (ko) * | 2014-06-27 | 2015-06-16 | 엘지디스플레이 주식회사 | 구동소자의 전기적 특성을 센싱할 수 있는 유기발광 표시장치 |
US20180075798A1 (en) * | 2016-09-14 | 2018-03-15 | Apple Inc. | External Compensation for Display on Mobile Device |
CN111785197B (zh) * | 2020-08-06 | 2023-06-09 | 京东方科技集团股份有限公司 | 一种电流检测装置及显示装置 |
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TWI248319B (en) * | 2001-02-08 | 2006-01-21 | Semiconductor Energy Lab | Light emitting device and electronic equipment using the same |
US7274363B2 (en) * | 2001-12-28 | 2007-09-25 | Pioneer Corporation | Panel display driving device and driving method |
BE1014861A6 (nl) * | 2002-05-31 | 2004-05-04 | Techni Coat International Nv | Werkwijze en inrichting voor het bedrukken van |
JP4406372B2 (ja) * | 2003-01-08 | 2010-01-27 | 東芝モバイルディスプレイ株式会社 | 表示装置及びその制御方法 |
JP4865986B2 (ja) | 2003-01-10 | 2012-02-01 | グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー | 有機el表示装置 |
JP2005148579A (ja) * | 2003-11-18 | 2005-06-09 | Agilent Technol Inc | Tftアレイの駆動電流測定方法および装置 |
JP4855648B2 (ja) | 2004-03-30 | 2012-01-18 | グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー | 有機el表示装置 |
US6987787B1 (en) * | 2004-06-28 | 2006-01-17 | Rockwell Collins | LED brightness control system for a wide-range of luminance control |
JP4635498B2 (ja) * | 2004-07-21 | 2011-02-23 | ソニー株式会社 | 表示装置、制御方法、記録媒体、およびプログラム |
JP4306657B2 (ja) * | 2004-10-14 | 2009-08-05 | ソニー株式会社 | 発光素子駆動装置および表示装置 |
JP4996065B2 (ja) * | 2005-06-15 | 2012-08-08 | グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー | 有機el表示装置の製造方法および有機el表示装置 |
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JP2008098057A (ja) | 2008-04-24 |
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