JP2005283777A - 液晶駆動回路 - Google Patents
液晶駆動回路 Download PDFInfo
- Publication number
- JP2005283777A JP2005283777A JP2004095134A JP2004095134A JP2005283777A JP 2005283777 A JP2005283777 A JP 2005283777A JP 2004095134 A JP2004095134 A JP 2004095134A JP 2004095134 A JP2004095134 A JP 2004095134A JP 2005283777 A JP2005283777 A JP 2005283777A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- driving circuit
- crystal driving
- display data
- transistors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/40—Roller blinds
- E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
- E06B9/50—Bearings specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B2009/2423—Combinations of at least two screens
- E06B2009/2441—Screens joined one below the other
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/78—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles
- E06B2009/785—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles by belts, straps, bands, tapes, cords, tassels
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
- E06B2009/807—Brakes preventing fast screen movement
-
- 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
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
-
- 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
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
【解決手段】 液晶素子に表示データに応じた階調電圧を印加して階調表示を行う液晶駆動回路において、ダイナミック回路で構成され、階調電圧を選択するデコーダ回路部を備え、デコーダ回路部は、隣接のデコーダを構成する同一論理のトランジスタ4を共通化しトランジスタ素子数を削減する。表示データに応じた電圧レベルがアナログスイッチ2を全てOFF状態にセットし、アナログスイッチ2がOFF状態に遷移する瞬間と、次の表示データによるアナログスイッチ2がONする瞬間の出力電圧の重なりを防止する。
【選択図】 図1
Description
本発明の液晶駆動回路の実施例について、図面を用いて説明する。
(64電圧レベル)×(7トランジスタ)=448個
のトランジスタから構成される。
2 アナログスイッチ
3 Pチャネルトランジスタ
4 Nチャネルトランジスタ
5 液晶パネル
6 液晶駆動IC
Claims (2)
- 液晶素子に表示データに応じた階調電圧を印加して階調表示を行う液晶駆動回路において、
ダイナミック回路で構成され、階調電圧を選択するデコーダ回路部を備え、該デコーダ回路部は、隣接のデコーダを構成する同一論理のトランジスターを共通化してトランジスター素子数を削減することを特徴とする液晶駆動回路。 - 液晶素子に印加する前に、表示データに応じた電圧レベルがアナログスイッチを全てOFF状態にセットし、アナログスイッチがOFF状態に遷移する瞬間と、次の表示データによるアナログスイッチがONする瞬間の出力電圧の重なりを防止する請求項1記載の液晶駆動回路。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004095134A JP2005283777A (ja) | 2004-03-29 | 2004-03-29 | 液晶駆動回路 |
TW094108657A TWI279761B (en) | 2004-03-29 | 2005-03-21 | Driving circuit for liquid crystal device |
US11/085,143 US20050212739A1 (en) | 2004-03-29 | 2005-03-22 | Driving circuit for liquid crystal device |
KR1020050025518A KR100638781B1 (ko) | 2004-03-29 | 2005-03-28 | 액정 구동 회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004095134A JP2005283777A (ja) | 2004-03-29 | 2004-03-29 | 液晶駆動回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2005283777A true JP2005283777A (ja) | 2005-10-13 |
Family
ID=34989184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004095134A Pending JP2005283777A (ja) | 2004-03-29 | 2004-03-29 | 液晶駆動回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050212739A1 (ja) |
JP (1) | JP2005283777A (ja) |
KR (1) | KR100638781B1 (ja) |
TW (1) | TWI279761B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7394419B2 (en) | 2006-04-06 | 2008-07-01 | Mitsubishi Electric Corporation | Decoding circuit for decoding multibit data, and a display apparatus utilizing the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100869858B1 (ko) * | 2007-06-27 | 2008-11-24 | (주)엠씨테크놀로지 | 액정 표시 장치, 그의 구동 장치, 디지털 아날로그 변환기및 출력 전압 증폭 회로 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5703617A (en) * | 1993-10-18 | 1997-12-30 | Crystal Semiconductor | Signal driver circuit for liquid crystal displays |
JP2004085666A (ja) * | 2002-08-23 | 2004-03-18 | Hitachi Ltd | 画像表示装置 |
-
2004
- 2004-03-29 JP JP2004095134A patent/JP2005283777A/ja active Pending
-
2005
- 2005-03-21 TW TW094108657A patent/TWI279761B/zh not_active IP Right Cessation
- 2005-03-22 US US11/085,143 patent/US20050212739A1/en not_active Abandoned
- 2005-03-28 KR KR1020050025518A patent/KR100638781B1/ko not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7394419B2 (en) | 2006-04-06 | 2008-07-01 | Mitsubishi Electric Corporation | Decoding circuit for decoding multibit data, and a display apparatus utilizing the same |
KR100860420B1 (ko) | 2006-04-06 | 2008-09-25 | 미쓰비시덴키 가부시키가이샤 | 디코딩 회로 및 표시 장치 |
Also Published As
Publication number | Publication date |
---|---|
US20050212739A1 (en) | 2005-09-29 |
TWI279761B (en) | 2007-04-21 |
TW200606785A (en) | 2006-02-16 |
KR20060044850A (ko) | 2006-05-16 |
KR100638781B1 (ko) | 2006-10-31 |
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