Cursor creation for touch screen

• US 20090201259A1
• Filed: 02/07/2008
• Published: 08/13/2009
• Est. Priority Date: 02/07/2008
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Nurmi, Juha H-P
• Application Number:
  US12/069,447
• Publication Number:
  US 20090201259A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184

Abstract

Quick cursor creation is obtained by providing touch detection information of at least one pixel cell to a source driver at the time when pixel information of the pixel cell is updated and updating pixel information of the pixel cell within a pixel output buffer depending on the touch detection information at the time when the pixel information is updated.

Claims

1. A method, comprising:

providing touch detection information of a pixel cell at a time when pixel information of the pixel cell is updated, and

updating pixel information of the pixel cell depending on the touch detection information at the time when the pixel information is updated.

2. The method of claim 1, wherein providing touch detection information comprises providing the touch detection information to a source driver.

3. The method of claim 1, wherein updating pixel information of the pixel cell comprises updating information within a pixel output buffer.

4. The method of claim 1, further comprising synchronizing touch detection and pixel updating such that at one time instance touch detection is enabled and pixel cells are updated within a same set of pixel cells.

5. The method of claim 4, wherein said synchronizing comprises combining at least a pixel selection line and a touch detection line within one common gate line.

6. The method of claim 3, wherein said updating the pixel information of the pixel cell within a pixel output buffer comprises changing the pixel information such that the pixel shows at least a part of a cursor.

7. The method of claim 1, further comprising arranging a source driver responsive to said touch detection information within a non-visible area of a display.

8. The method of claim 1, further comprising changing pixel output buffers of at least one neighboring pixel cell of a first pixel cell when a touch is detected within the first pixel cell.

9. The method of claim 1, further comprising changing pixel output buffers of pixel cells in a circular vicinity of a first pixel cell when a touch is detected within the first pixel cell.

10. The method of claim 1, further comprising providing a source driver with information about first pixel cells, where user input is possible and further changing a pixel output buffer of at least one pixel cell of the first pixel cells, which is closest to said at least one pixel cell where a touch is detected.

11. The method of claim 4, wherein a cursor shape is generated with at least one of

A) a line shape,

B) an arrow shape,

by changing pixel output buffers of pixel cells which are spatially arranged according to the cursor shape.

12. An apparatus, comprising:

a touch screen,

a driver within the touch screen,

wherein the driver is connected to a touch detection sensor,

wherein the driver is connected to at least one pixel cell, and

wherein the touch detection information is read out from the touch detection sensor by the driver at a time when pixel information of the pixel cell is updated,

wherein the driver updates pixel information of the pixel cell within a storage depending on the touch detection information at the time when the pixel information is updated.

13. A device, comprising:

touch detection means arranged within pixel cells of a touch screen for detecting touches within the pixel cells,

driving means for driving source lines of the touch screen such that the driving means are connected to the touch detection means,

wherein the driving means are connected to at least one pixel cell, and

wherein the touch detection means are read out by the driving means at the time when pixel information of the pixel cell is updated,

wherein the driving means update pixel information of the pixel cell within a storage means depending on the detected touches at a time when the pixel information is updated.

14. A computer-readable medium having a computer program stored thereon, the computer program comprising:

instructions operable to cause a processor to

provide touch detection information of a pixel cell to a driver at a time when pixel information of the pixel cell is updated, and

update pixel information of the pixel cell within a storage depending on the touch detection information at the time when the pixel information is updated.