Selective illumination of regions of an electronic display

• US 7,145,558 B2
• Filed: 09/03/2003
• Issued: 12/05/2006
• Est. Priority Date: 09/03/2003
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Ong, Dee Nai
• Primary Examiner(s): Shalwala, Bipin
• Assistant Examiner(s): Dharia, Prabodh
• Application Number:
  US10/654,290
• Publication Number:
  US 20050057539A1
• Time in Patent Office: 1,189 Days
• Field of Search: 345/204, 345/102, 345/207, 345 76- 89, 345/211, 349/24, 349/113, 347/14, 347/19, 347/23, 340/436, 340/502, 340/438, 455550-575, 348/229.1, 315/291, 715/794, 358/1.15, 250/591
• US Class Current: 345/204
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/0633 by amplitude modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines

Abstract

An electronic device (1) provides for the selective illuminating of an associated display (5) thereby reducing battery power consumption. The electronic device (1) provides for detecting an event that will trigger an update of the display (5) and activation of illumination elements (27) for illuminating the display and determining whether the information to be displayed will occupy a region (B–L) of the display. If so, the region of the display is selectively illuminated by one or more of the illumination elements. The predetermined illumination time period may depend on a selected combination of a size of the region, a location of said region and/or a priority associated with the event.

Claims

1. A method for selectively illuminating regions of a display of a portable electronic device, the display comprising a plurality of illuminating regions, said method including:

detecting an event, to be displayed on the screen, that will trigger an update of said display and activation of illumination elements for illuminating said display;

determining at least one region, from said regions, that require illuminating during said update;

determining an illumination time period that varies dependent on a size of said at least one region that requires illuminating; and

selectively illuminating said at least one region of said display for said predetermined illumination time period.

2. The method of claim 1, wherein said determining includes referring to a mapping table to determine said illumination elements to be activated to selectively illuminate said region of said display.

3. The method of claim 1, wherein said predetermined illumination time period depends on a location of said at least one region in said display.

4. The method of claim 1, wherein smaller regions are illuminated for shorter predetermined time periods than larger regions.

5. The method of claim 1, wherein the predetermined illumination time period is also dependent on a priority of said event.

6. The method of claim 1, wherein the step of selectively illuminating said region of said display includes activating one or more of said illumination elements adjacent at least one side of said display to illuminate a side at least one region of said display.

7. The method of claim 1, wherein the step of selectively illuminating said region of said display includes activating one or more of said illumination elements adjacent opposing sides of said display to illuminate a substantially central region of said display.

8. The method of claim 1, wherein the step of selectively illuminating said at least one region includes activating a selected combination of said illumination elements.

9. The method of claim 1, wherein the step of selectively illuminating said at least one region includes activating said illumination elements illuminating said at least one region to a first brightness and activating a remainder of said illumination elements to a second brightness.

10. The method of claim 1, wherein the step of selectively illuminating said at least one region includes one or more of said illumination elements alternating between an activated state and a deactivated or partially activated state to produce flashing illumination.

11. The method of claim 1, wherein the larger the area of said at least one region that requires illuminating, the longer the time period of illumination.

12. A portable electronic device comprising:

a display for displaying information;

a plurality of illumination elements located adjacent said display for illuminating said display;

a display handling module coupled to said display for;

i) updating said display in response to said device detecting an event, to be displayed on the screen, the event triggering an update of said display and activation of said illumination elements; and

ii) determining a region of said display in which said information will be displayed during said update, wherein said determining includes identifying an illumination time period that varies dependent on a size of said region; and

,

an illumination control module coupled to said display handling module for controlling selective illumination of said region for said predetermined illumination time period.

13. The portable electronic device of claim 12, further comprising an illumination driver coupled to said illumination control module and to said illumination elements for controlling activation and deactivation of said illumination elements in response to signals from said illumination control module.

14. The portable electronic device of claim 12, wherein said mapping table comprising identities of said illumination elements to be activated to selectively illuminate said region.

15. The portable electronic device of claim 12, wherein said identifying includes referring to a mapping table comprising a priority associated with each said event and an illumination time period associated with each said priority.

16. The portable electronic device of claim 12, wherein said mapping table has a predetermined illumination brightness value associated with a priority of each said event.

17. A method for selectively illuminating regions of a display of a portable electronic device, the display comprising a plurality of illuminating regions, said method including:

detecting an event, to be displayed on the screen, that will trigger an update of said display and activation of illumination elements for illuminating said display;

determining at least one region, from said regions, that require illuminating during said update;

determining an illumination time period that varies dependent on a size of said region; and

selectively applying an illumination brightness in accordance with said priority of said event to provide for illuminating said region of said display for said predetermined illumination time period.

18. The method of claim 17, wherein said determining includes referring to the mapping table to determine said illumination elements to be activated to selectively illuminate said region of said display.

19. The method of claim 17, wherein smaller regions are illuminated for shorter predetermined time periods than larger regions.

20. The method of claim 17, wherein the predetermined illumination rime period is also dependent on a priority of said event.

21. The method of claim 17, wherein the step of selectively illuminating said region of said display includes activating one or more of said illumination elements adjacent at least one side of said display to illuminate a side region of said display.

22. The method of claim 17, wherein the step of selectively illuminating said region includes activating said illumination elements illuminating said region to a first brightness and activating a remainder of said illumination elements to a second brightness.