JP2018040963A - 表示ドライバ及び表示装置 - Google Patents
表示ドライバ及び表示装置 Download PDFInfo
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- JP2018040963A JP2018040963A JP2016175197A JP2016175197A JP2018040963A JP 2018040963 A JP2018040963 A JP 2018040963A JP 2016175197 A JP2016175197 A JP 2016175197A JP 2016175197 A JP2016175197 A JP 2016175197A JP 2018040963 A JP2018040963 A JP 2018040963A
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- Prior art keywords
- polarity
- signal
- polarity inversion
- abnormality detection
- logic level
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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
-
- 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
-
- 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
Abstract
Description
13 ソースドライバ
20 表示デバイス
140 極性反転異常検知回路
141 レジスタ
142 異常判定部
Claims (5)
- 映像信号に対応した画素駆動電圧を表示デバイスに供給する表示ドライバであって、
前記映像信号に基づく各画素の輝度レベルに対応した電圧の極性を、伝送ラインを介して受けた正極性及び負極性を示す極性反転信号に応じて反転させた電圧を前記画素駆動電圧として生成する駆動電圧生成部と、
前記映像信号におけるNフレーム(Nは2以上の整数)の期間に亘り前記極性反転信号によって示される極性が一定となる場合に、前記伝送ラインの異常を示す異常検知信号を生成する極性反転異常検知部と、を有することを特徴とする表示ドライバ。 - 前記極性反転信号は、論理レベル0及び論理レベル1の状態に交互にレベルが変化する2値信号であり、
前記極性反転異常検知部は、
前記極性反転信号の1フレーム期間毎のレベルを前記Nフレーム分記憶するレジスタと、
前記レジスタに記憶されている前記Nフレーム分の前記極性反転信号のレベルが全て前記論理レベル0又は前記論理レベル1である場合に前記異常検知信号を生成する異常判定部と、を含むことを特徴とする請求項1記載の表示ドライバ。 - 映像信号に基づく画像を表示デバイスに表示させる表示装置であって、
表示ドライバと、
正極性及び負極性を示す極性反転信号を伝送ラインを介して前記表示ドライバに供給する制御部と、を有し、
前記表示ドライバは、
前記映像信号に基づく各画素の輝度レベルに対応した電圧の極性を、前記伝送ラインを介して受けた前記極性反転信号に応じて反転させた電圧を画素駆動電圧として前記表示デバイスに供給する駆動電圧生成部と、
前記映像信号におけるNフレーム(Nは2以上の整数)の期間に亘り前記極性反転信号によって示される極性が一定となる場合に、前記伝送ラインの異常を示す異常検知信号を前記制御部に供給する極性反転異常検知部と、を含むことを特徴とする表示装置。 - 前記制御部は、前記異常検知信号に応じてドライバ停止信号を前記表示ドライバに供給するドライバ停止制御部を含み、
前記表示ドライバは、前記ドライバ停止信号に応じて前記画素駆動電圧の前記表示デバイスへの供給を停止することを特徴とする請求項3記載の表示装置。 - 前記極性反転信号は、論理レベル0及び論理レベル1の状態に交互にレベルが変化する2値信号であり、
前記極性反転異常検知部は、
前記極性反転信号の1フレーム期間毎のレベルを前記Nフレーム分記憶するレジスタと、
前記レジスタに記憶されている前記Nフレーム分の前記極性反転信号のレベルが全て前記論理レベル0又は前記論理レベル1である場合に前記異常検知信号を出力する異常判定部と、を含むことを特徴とする請求項3又は4に記載の表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016175197A JP2018040963A (ja) | 2016-09-08 | 2016-09-08 | 表示ドライバ及び表示装置 |
US15/697,941 US10134347B2 (en) | 2016-09-08 | 2017-09-07 | Display driver and display apparatus |
CN201710804724.5A CN107808622B (zh) | 2016-09-08 | 2017-09-08 | 显示驱动器以及显示装置 |
Applications Claiming Priority (1)
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JP2016175197A JP2018040963A (ja) | 2016-09-08 | 2016-09-08 | 表示ドライバ及び表示装置 |
Publications (1)
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JP2018040963A true JP2018040963A (ja) | 2018-03-15 |
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JP2016175197A Pending JP2018040963A (ja) | 2016-09-08 | 2016-09-08 | 表示ドライバ及び表示装置 |
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US (1) | US10134347B2 (ja) |
JP (1) | JP2018040963A (ja) |
CN (1) | CN107808622B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11367407B2 (en) | 2019-08-30 | 2022-06-21 | Lapis Semiconductor Co., Ltd. | Display driver, display device, and semiconductor device to detect fault in fixed driving voltage applied to a display panel |
Citations (9)
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JPS61188193U (ja) * | 1985-05-15 | 1986-11-22 | ||
JPS63135394U (ja) * | 1987-02-27 | 1988-09-06 | ||
JPH02245792A (ja) * | 1989-03-20 | 1990-10-01 | Hitachi Ltd | 液晶表示装置 |
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2016
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2017
- 2017-09-07 US US15/697,941 patent/US10134347B2/en active Active
- 2017-09-08 CN CN201710804724.5A patent/CN107808622B/zh active Active
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JPS61188193U (ja) * | 1985-05-15 | 1986-11-22 | ||
JPS63135394U (ja) * | 1987-02-27 | 1988-09-06 | ||
JPH02245792A (ja) * | 1989-03-20 | 1990-10-01 | Hitachi Ltd | 液晶表示装置 |
JPH07318889A (ja) * | 1994-05-19 | 1995-12-08 | Sanyo Electric Co Ltd | 液晶駆動回路 |
US5731812A (en) * | 1995-05-26 | 1998-03-24 | National Semiconductor Corp. | Liquid crystal display (LCD) protection circuit |
JP2004294728A (ja) * | 2003-03-26 | 2004-10-21 | Sanyo Electric Co Ltd | 蛍光表示管駆動回路 |
KR20070071955A (ko) * | 2005-12-30 | 2007-07-04 | 삼성전자주식회사 | 액정 표시 장치 및 이의 구동 방법 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11367407B2 (en) | 2019-08-30 | 2022-06-21 | Lapis Semiconductor Co., Ltd. | Display driver, display device, and semiconductor device to detect fault in fixed driving voltage applied to a display panel |
Also Published As
Publication number | Publication date |
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CN107808622A (zh) | 2018-03-16 |
US10134347B2 (en) | 2018-11-20 |
US20180068623A1 (en) | 2018-03-08 |
CN107808622B (zh) | 2022-04-01 |
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