CA2508183A1 - Mixed monochrome and colour display driving technique - Google Patents

Mixed monochrome and colour display driving technique Download PDF

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Publication number
CA2508183A1
CA2508183A1 CA 2508183 CA2508183A CA2508183A1 CA 2508183 A1 CA2508183 A1 CA 2508183A1 CA 2508183 CA2508183 CA 2508183 CA 2508183 A CA2508183 A CA 2508183A CA 2508183 A1 CA2508183 A1 CA 2508183A1
Authority
CA
Canada
Prior art keywords
region
wireless communications
communications device
pixels
display screen
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.)
Granted
Application number
CA 2508183
Other languages
French (fr)
Other versions
CA2508183C (en
Inventor
Kuo-Feng Tong
Marc Drader
Robert Lowles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of CA2508183A1 publication Critical patent/CA2508183A1/en
Application granted granted Critical
Publication of CA2508183C publication Critical patent/CA2508183C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • 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
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0213—Addressing of scan or signal lines controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0613—The adjustment depending on the type of the information to be displayed
    • 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
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

A display screen is capable of having regions having different switching speeds as well as regions that are not switched. One region having a first switching speed may be for colour mode display and the other region having a second switching speed different from the first may be for monochrome mode display. Other regions may be off and not switched. In alternative versions, three or more switched regions may be established on a display screen. For example, a monochrome region may be nested inside a colour region, in which the colour region may be nested between off regions.

Claims (26)

1. A method for practicing multiple scanning modes on a display screen in a handheld wireless communications device, comprising:

scanning a first region of contiguous lines of pixels at a first number of times in a frame period; and scanning a second region of contiguous lines of pixels at a second number of times in the frame period, wherein the first number of times is not equal to the second number of times.
2. The method of Claim 1, wherein the first number of times is N times the second number of times, where N is a positive integer and obeys a selected one of the following relationships: i) N is greater than 3; ii) N is between six and sixteen, inclusive;
iii) N is between six and twelve inclusive; iv) N is equal to six; v) N is equal to eight; and vi) N is equal to ten.
3. The method of Claim 1 or 2, wherein the first region of contiguous lines of pixels is a colour region and/or the second region of contiguous lines of pixels is a monochrome region.
4. The method of any of Claims 1 to 3, further comprising scanning a third region of contiguous lines of pixels a third number of times in the frame period.
5. The method of Claim 4, wherein the third number of times is the same as the first number of times.
6. The method of Claim 4, wherein the third number of times is different from the first number of times.
7. The method of any of Claims 1 to 6, further comprising leaving at least one line of pixels in an off state.
8. The method of any of Claims 1 to 7, wherein scanning the second region of contiguous pixel lines occurs three times in a frame.
9. ~The method of Claim 8, wherein each of the three times corresponds to a different colour of illumination light.
10. ~The method of Claim 9, wherein the different colours are red, green, and blue or cyan, magenta, and yellow.
11. ~The method of any of Claims 1 to 10, wherein the refresh rate in the first region is different from the refresh rate in the second region.
12. ~A wireless communications device, comprising:
a display screen having multiple lines of pixels arranged in a matrix format, the display screen having a first region and a second region in which each pixel in the first region is capable of being switched on a greater number of times than each pixel in the second region per frame period; and a light source for illuminating the display screen.
13. ~The wireless communications device of Claim 12, further comprising a display controller for controlling the display screen and a light source controller for controlling the light source.
14. ~The wireless communications device of Claim 13, wherein the display controller controls operations of the light source controller.
15. ~The wireless communications device of any of Claims 12 to 14, wherein the display screen is a liquid crystal display screen.
16. ~The wireless communications device of any of Claims 12 to 15, wherein the light source includes light emitting diodes.
17. ~The wireless communications device of Claim 16, wherein a first one of the light emitting diodes emits red light, a second one of the light emitting diodes emits green light, and a third one of the light emitting diodes emits blue light.
18. ~The wireless communications device of any of Claims 12 to 17, wherein each pixel in the first region is capable of being switched on between two and sixteen times, inclusive, for each time any pixel in the second region is switched on.
19. ~The wireless communications device of any of Claims 12 to 18, wherein the pixels in the matrix format are driven by a source driver and a gate driver.
20. ~The wireless communications device of Claim 19, wherein the source driver is loaded with values to drive source lines of a selected row of the pixels.
21. ~The wireless communications device of Claim 20, wherein the values are read from a look up table.
22. ~The wireless communications device of Claim 19, wherein each of the values for the first region is multiple bits in length and each of the values for the second region is a single bit in length.
23. ~The wireless communications device of any of Claims 19 to 22, wherein the gate driver is capable of selecting rows of pixels for monochrome mode and selecting other rows of pixels for colour mode.
24. ~The wireless communications device of Claim 23, wherein selection of rows within a region is performed in a sequential manner.
25. ~The wireless communications device of Claim 24, wherein the selection of rows in a sequential manner is accomplished by rippling a bit through a shift register to drive gates in a matrix or by selectively loading one shift register selected from a plurality of shift registers.
26. ~A machine readable medium comprising program code executable on a device as claimed in any of claims 12 to 25 for implementing the method as claimed in any of claims 1 to 11.
CA2508183A 2004-06-02 2005-05-24 Mixed monochrome and colour display driving technique Active CA2508183C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04102468.8 2004-06-02
EP04102468.8A EP1603108B1 (en) 2004-06-02 2004-06-02 Mixed Monochrome and Colour Display Driving Technique

Publications (2)

Publication Number Publication Date
CA2508183A1 true CA2508183A1 (en) 2005-12-02
CA2508183C CA2508183C (en) 2010-11-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2508183A Active CA2508183C (en) 2004-06-02 2005-05-24 Mixed monochrome and colour display driving technique

Country Status (4)

Country Link
EP (1) EP1603108B1 (en)
CN (1) CN1705008B (en)
CA (1) CA2508183C (en)
SG (1) SG117594A1 (en)

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CN114582252A (en) * 2022-02-28 2022-06-03 深圳市思坦科技有限公司 Display module, display panel and display

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TWI425488B (en) * 2009-11-03 2014-02-01 Nuvoton Technology Corp Driver of field sequential display and driving mehtod thereof
CN102346996B (en) * 2010-08-04 2013-12-25 深圳莱宝高科技股份有限公司 Display apparatus and driving circuit thereof
EP2904484A4 (en) * 2012-10-05 2016-06-01 Tactual Labs Co Hybrid systems and methods for low-latency user input processing and feedback
US10109240B2 (en) 2016-09-09 2018-10-23 Apple Inc. Displays with multiple scanning modes
US10482822B2 (en) 2016-09-09 2019-11-19 Apple Inc. Displays with multiple scanning modes
CN106652972B (en) 2017-01-03 2020-06-05 京东方科技集团股份有限公司 Processing circuit of display screen, display method and display device
CN106782268B (en) 2017-01-04 2020-07-24 京东方科技集团股份有限公司 Display system and driving method for display panel
CN107145192B (en) 2017-04-27 2021-01-15 Oppo广东移动通信有限公司 Electronic device
JP7252786B2 (en) * 2019-02-28 2023-04-05 キヤノン株式会社 Communication device, communication method, and program
CN112447145B (en) * 2019-08-29 2022-06-24 北京小米移动软件有限公司 Display panel, display mode switching method and device and electronic equipment

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN114582252A (en) * 2022-02-28 2022-06-03 深圳市思坦科技有限公司 Display module, display panel and display
CN114582252B (en) * 2022-02-28 2023-11-24 深圳市思坦科技有限公司 Display module, display panel and display

Also Published As

Publication number Publication date
EP1603108A1 (en) 2005-12-07
CA2508183C (en) 2010-11-23
EP1603108B1 (en) 2017-03-22
CN1705008A (en) 2005-12-07
CN1705008B (en) 2010-04-28
SG117594A1 (en) 2005-12-29

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