JP2021039139A - 表示ドライバ、表示装置及び半導体装置 - Google Patents
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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
- G09G3/34—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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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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
- G09G3/34—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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
-
- 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
- G09G3/34—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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data 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
- 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
- G09G3/34—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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/061—Details of flat display driving waveforms for resetting or blanking
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- 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
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (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)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
- Control Of El Displays (AREA)
Abstract
Description
これにより、画素データBmaxに基づく画素駆動電圧G1の値は、図5に示すように連続する第(N−1)(Nは2以上の整数)及び第Nのフレーム期間各々の垂直ブランキング期間(第1及び第2の垂直ブランキング期間と称する)の間で、負極性の最小の電圧値Vminから正極性の最大の電圧値Vmaxに遷移する。よって、故障検知回路141の2値化回路21が、当該画素駆動電圧G1を閾値電圧VDMで2値化した2値化信号BZの論理レベルは、図5に示すように、第1及び第2の垂直ブランキング期間の各々内で反転する。
20 表示パネル
21 2値化回路
22、23 D型フリップフロップ
24 アンドゲート
25 ノアゲート
26 オアゲート
140 制御部
141 故障検知回路
Claims (7)
- 各画素の輝度レベルを表す画素データ片の系列を含む映像信号を受け、前記画素データ片に対応した画素駆動電圧を生成して表示パネルに出力する表示ドライバであって、
前記映像信号の非表示期間に、故障検知用の第1の画素データ片及び第2の画素データ片を順に含ませる制御部と、
前記第1の画素データ片に応じて出力された第1の画素駆動電圧、及び前記第2の画素データ片に応じて出力された第2の画素駆動電圧を夫々所定の閾値電圧で2値化して第1及び第2の信号を得て、前記第1の信号と前記第2の信号とが一致しているか否かを判定し、一致している場合に故障有りを示す故障検知信号を出力する故障検知回路と、を有することを特徴とする表示ドライバ。 - 前記非表示期間は、前記映像信号に各フレーム期間に含まれる垂直ブランキング期間であり、
前記制御部は、
互いに隣り合う前記フレーム期間各々のうちの一方のフレーム期間に含まれる前記垂直ブランキング期間に前記第1の画素データ片を含ませ、他方のフレーム期間に含まれる前記垂直ブランキング期間に前記第2の画素データ片を含ませ、
前記故障検知回路は、
前記一方のフレーム期間の前記垂直ブランキング期間に含まれる前記第1の画素データ片に応じて出力された第1の画素駆動電圧、及び前記他方のフレーム期間の前記垂直ブランキング期間に含まれる前記第2の画素データ片に応じて出力された第2の画素駆動電圧を夫々前記閾値電圧で2値化することで前記第1の信号及び前記第2の信号を得ることを特徴とする請求項1に記載の表示ドライバ。 - 前記画素駆動電圧は、その極性が1フレーム期間毎に正極性から負極性、又は負極性から正極性に反転され、
前記閾値電圧は、正極性の電圧と負極性の電圧との境界の電圧値を有することを特徴とする請求項1又は2に記載の表示ドライバ。 - 前記第1の画素データ片及び前記第2の画素データ片は共に最大の輝度レベルを表すデータであることを特徴とする請求項3に記載の表示ドライバ。
- 前記第1の画素データ片は最大及び最小の輝度レベルのうちの一方の輝度レベルを表すデータであり、前記第2の画素データ片は前記最大及び最小の輝度レベルのうちの他方の輝度レベルを表すデータであり、
前記閾値電圧は、前記最大の輝度レベルと前記最小の輝度レベルとの間の輝度レベルに対応した電圧値を有することを特徴とする請求項1又は2に記載の表示ドライバ。 - 請求項1〜5のいずれか1に記載の表示ドライバと、
前記画素駆動電圧が入力される表示パネルと、を有することを特徴とする表示装置。 - 各画素の輝度レベルを表す画素データ片の系列を含む映像信号を受け、前記画素データ片に対応した画素駆動電圧を生成して表示パネルに出力する表示ドライバを含む半導体装置であって、
前記表示ドライバは、
前記映像信号の非表示期間に、故障検知用の第1の画素データ片及び第2の画素データ片を順に含ませる制御部と、
前記第1の画素データ片に応じて出力された第1の画素駆動電圧、及び前記第2の画素データ片に応じて出力された第2の画素駆動電圧を夫々所定の閾値電圧で2値化して第1及び第2の信号を得て、前記第1の信号と前記第2の信号とが一致しているか否かを判定し、一致している場合に故障有りを示す故障検知信号を出力する故障検知回路と、を有することを特徴とする半導体装置。
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JP2019158264A JP7232739B2 (ja) | 2019-08-30 | 2019-08-30 | 表示ドライバ、表示装置及び半導体装置 |
US16/997,222 US11367407B2 (en) | 2019-08-30 | 2020-08-19 | Display driver, display device, and semiconductor device to detect fault in fixed driving voltage applied to a display panel |
CN202010841432.0A CN112447149B (zh) | 2019-08-30 | 2020-08-20 | 显示驱动器、显示装置和半导体装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015197473A (ja) * | 2014-03-31 | 2015-11-09 | ソニー株式会社 | 信号処理方法、表示装置、及び電子機器 |
WO2017150116A1 (ja) * | 2016-03-01 | 2017-09-08 | ローム株式会社 | 液晶駆動装置 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3333138B2 (ja) * | 1998-09-25 | 2002-10-07 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 液晶表示装置の駆動方法 |
KR100653751B1 (ko) * | 1998-10-27 | 2006-12-05 | 샤프 가부시키가이샤 | 표시 패널의 구동 방법, 표시 패널의 구동 회로 및 액정 표시 장치 |
JP2003167545A (ja) * | 2001-11-30 | 2003-06-13 | Sharp Corp | 画像表示用信号の異常検出方法および画像表示装置 |
CN100573646C (zh) * | 2006-06-30 | 2009-12-23 | 乐金显示有限公司 | 基准电压产生电路以及采用其的液晶显示器件 |
JP5072489B2 (ja) * | 2007-08-30 | 2012-11-14 | 株式会社ジャパンディスプレイウェスト | 表示装置およびその駆動方法、電子機器 |
JP4375463B2 (ja) * | 2007-08-31 | 2009-12-02 | ソニー株式会社 | 表示装置及び表示方法 |
CN101855668B (zh) * | 2007-11-14 | 2013-01-16 | 株式会社半导体能源研究所 | 液晶显示装置 |
KR101341904B1 (ko) * | 2009-02-20 | 2013-12-13 | 엘지디스플레이 주식회사 | 액정 표시장치의 구동장치와 그 구동방법 |
US10996258B2 (en) * | 2009-11-30 | 2021-05-04 | Ignis Innovation Inc. | Defect detection and correction of pixel circuits for AMOLED displays |
KR101276557B1 (ko) * | 2010-12-14 | 2013-06-24 | 엘지디스플레이 주식회사 | 디스플레이 장치와 이의 구동방법 |
WO2012141112A1 (ja) * | 2011-04-15 | 2012-10-18 | シャープ株式会社 | 表示装置、表示装置の駆動方法及び電子機器 |
JP2015004945A (ja) * | 2013-02-04 | 2015-01-08 | ソニー株式会社 | 表示装置及びその駆動方法、並びに、制御パルス生成装置 |
JP6180318B2 (ja) * | 2013-12-27 | 2017-08-16 | ソニーセミコンダクタソリューションズ株式会社 | コンパレータ回路 |
JP6367566B2 (ja) * | 2014-01-31 | 2018-08-01 | ラピスセミコンダクタ株式会社 | 表示デバイスのドライバ |
JP6433716B2 (ja) * | 2014-08-19 | 2018-12-05 | ラピスセミコンダクタ株式会社 | 表示装置及び画像データ信号の伝送処理方法 |
JP2017181574A (ja) * | 2016-03-28 | 2017-10-05 | 株式会社ジャパンディスプレイ | 表示装置 |
JP2018040963A (ja) | 2016-09-08 | 2018-03-15 | ラピスセミコンダクタ株式会社 | 表示ドライバ及び表示装置 |
KR102417475B1 (ko) * | 2017-07-21 | 2022-07-05 | 주식회사 엘엑스세미콘 | 표시장치, 센싱회로 및 소스드라이버집적회로 |
US11109017B2 (en) * | 2018-09-12 | 2021-08-31 | Semiconductor Components Industries, Llc | Systems and methods for fault detection in image sensor processors |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015197473A (ja) * | 2014-03-31 | 2015-11-09 | ソニー株式会社 | 信号処理方法、表示装置、及び電子機器 |
WO2017150116A1 (ja) * | 2016-03-01 | 2017-09-08 | ローム株式会社 | 液晶駆動装置 |
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