HK1052789B - Method and apparatus for driving a digital display by distributing pwm pulses over time - Google Patents
Method and apparatus for driving a digital display by distributing pwm pulses over timeInfo
- Publication number
- HK1052789B HK1052789B HK03104704.6A HK03104704A HK1052789B HK 1052789 B HK1052789 B HK 1052789B HK 03104704 A HK03104704 A HK 03104704A HK 1052789 B HK1052789 B HK 1052789B
- Authority
- HK
- Hong Kong
- Prior art keywords
- signals
- time period
- lowest order
- pulses
- digital display
- Prior art date
Links
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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
-
- 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
-
- 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
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
- G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
- G09G3/14—Semiconductor devices, e.g. diodes
-
- 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
- G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen
Abstract
This invention provides a method and apparatus to distribute pulses of a pulse width modulated signal over a time period. When applied to a digital display, the invention provides a signal representing the digital data comprising a plurality of smaller pulses distributed over the refresh time period to drive the display element. A logic circuit is provided to generate a plurality of combinable signals so that the incoming data can be combined with the signals to determine the mix of signals generated as a final output. The individual signals are generated by identifying the lowest order active bit of a counter that is subdividing the appropriate time period into smaller time divisions and generating a pulse on one of a plurality of outputs with each unique lowest order bit identified ouptut on a separate output and successive common lowest order bits identified generating pulses on the same output.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53552800A | 2000-03-27 | 2000-03-27 | |
PCT/IB2001/000477 WO2001073736A1 (en) | 2000-03-27 | 2001-03-26 | Method and apparatus for driving a digital display by distributing pwm pulses over time |
Publications (2)
Publication Number | Publication Date |
---|---|
HK1052789A1 HK1052789A1 (en) | 2003-09-26 |
HK1052789B true HK1052789B (en) | 2012-03-09 |
Family
ID=24134633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK03104704.6A HK1052789B (en) | 2000-03-27 | 2003-07-02 | Method and apparatus for driving a digital display by distributing pwm pulses over time |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP1269455B1 (en) |
JP (1) | JP2003529100A (en) |
KR (1) | KR20020093011A (en) |
CN (1) | CN1272757C (en) |
AT (1) | ATE534984T1 (en) |
AU (1) | AU779338B2 (en) |
CA (1) | CA2403939C (en) |
EA (1) | EA005964B1 (en) |
HK (1) | HK1052789B (en) |
MY (1) | MY126157A (en) |
TW (1) | TW581999B (en) |
WO (1) | WO2001073736A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3923341B2 (en) | 2002-03-06 | 2007-05-30 | 株式会社半導体エネルギー研究所 | Semiconductor integrated circuit and driving method thereof |
GB2403841B (en) * | 2003-07-07 | 2006-08-09 | Pelikon Ltd | Control of Electroluminescent displays |
JP4016942B2 (en) * | 2003-12-10 | 2007-12-05 | セイコーエプソン株式会社 | PWM signal generation circuit and display driver |
KR100718962B1 (en) * | 2004-12-28 | 2007-05-16 | 엘지전자 주식회사 | Projection Display Driving Apparatus |
WO2012022235A1 (en) * | 2010-08-19 | 2012-02-23 | 深圳市明微电子股份有限公司 | Method and device for frequency multiplication of display control |
US20200135128A1 (en) * | 2017-05-08 | 2020-04-30 | Compound Photonics Limited | Drive techniques for modulation devices |
CN112985325B (en) * | 2021-04-21 | 2021-08-17 | 天津飞旋科技股份有限公司 | Position decoding method and device of sine and cosine encoder and computer readable medium |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03246592A (en) | 1990-02-23 | 1991-11-01 | Seiko Instr Inc | Gradation display circuit of display device |
JP3500899B2 (en) | 1997-03-27 | 2004-02-23 | 三菱電機株式会社 | Image display method and image display device |
-
2001
- 2001-03-26 AT AT01915598T patent/ATE534984T1/en active
- 2001-03-26 AU AU42680/01A patent/AU779338B2/en not_active Ceased
- 2001-03-26 CA CA2403939A patent/CA2403939C/en not_active Expired - Lifetime
- 2001-03-26 JP JP2001571376A patent/JP2003529100A/en active Pending
- 2001-03-26 WO PCT/IB2001/000477 patent/WO2001073736A1/en active IP Right Grant
- 2001-03-26 KR KR1020027012890A patent/KR20020093011A/en not_active Application Discontinuation
- 2001-03-26 EA EA200201021A patent/EA005964B1/en not_active IP Right Cessation
- 2001-03-26 CN CNB01807359XA patent/CN1272757C/en not_active Expired - Lifetime
- 2001-03-26 EP EP01915598A patent/EP1269455B1/en not_active Expired - Lifetime
- 2001-03-27 TW TW090107242A patent/TW581999B/en not_active IP Right Cessation
- 2001-03-27 MY MYPI20011399A patent/MY126157A/en unknown
-
2003
- 2003-07-02 HK HK03104704.6A patent/HK1052789B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AU4268001A (en) | 2001-10-08 |
EP1269455B1 (en) | 2011-11-23 |
AU779338B2 (en) | 2005-01-20 |
MY126157A (en) | 2006-09-29 |
WO2001073736A1 (en) | 2001-10-04 |
TW581999B (en) | 2004-04-01 |
CN1272757C (en) | 2006-08-30 |
EA005964B1 (en) | 2005-08-25 |
ATE534984T1 (en) | 2011-12-15 |
EA200201021A1 (en) | 2003-02-27 |
HK1052789A1 (en) | 2003-09-26 |
CN1421028A (en) | 2003-05-28 |
CA2403939A1 (en) | 2001-10-04 |
KR20020093011A (en) | 2002-12-12 |
EP1269455A1 (en) | 2003-01-02 |
CA2403939C (en) | 2012-03-27 |
JP2003529100A (en) | 2003-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20200326 |