Labeling Touch Regions of a Display Device

• US 20130141344A1
• Filed: 03/05/2012
• Published: 06/06/2013
• Est. Priority Date: 12/06/2011
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Oh, Seung-Seok
• Granted Patent: US 8,847,901 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

The embodiments herein relate to a method and device for labeling a touch region, in which adjacent raw data are labeled in groups for reducing a labeling time period as well as a memory size for storing the labeled data.

Claims

1. A computer-implemented method for labeling a touch region of a display device, the method comprising:

receiving labels of nodes of a touch sensor capable of detecting a plurality of distinct regions that are touched, each label indicating whether an associated node has been touched;

assigning label data to nodes that have been touched based on the labels and based on label data of adjacent nodes during a single scanning of the label data; and

grouping the labeled nodes into one or more touch regions based on the assigned label data.

2. The computer-implemented method of claim 1, wherein assigning the label data to the nodes comprises:

for a target node indicated by the labels as being touched,

assigning first label data to the target node responsive to an adjacent node of the target node previously assigned with the first label data; and

assigning second label data to the target node responsive to any of nodes adjacent to the target node not previously assigned with a label data, the second label data indicative of a different touch region relative to the first label data.

3. The computer-implemented method of claim 1, further comprising:

calculating coordinates associated with the one or more touch regions.

4. The computer-implemented method of claim 1, further comprising:

assigning initial values to the label data of the nodes of the touch sensor.

5. The computer-implemented method of claim 1, wherein assigning label data to the nodes that have been touched comprises for a target node that has been touched:

identifying a first node that is adjacent to the target node, the first node comprising first label data associated with a first value;

identifying a second node that is adjacent to the target node, the second node comprising second label data associated with a second value that is greater than the first value of the first label data; and

assigning the first label data to the target node.

6. The computer-implemented method of claim 5, further comprising:

updating the second label data of the second node with the first value of the first label data.

7. The computer-implemented method of claim 1, further comprising:

adding additional labels associated with nodes located at edges of the touch sensor, the additional labels indicating that associated nodes have not been touched.

8. The computer-implemented method of claim 1, wherein the label data comprises a memory size that is the same as a memory size of the labels.

9. The computer-implemented method of claim 1, further comprising:

applying a scanning mask to the labels, the scanning mask comprising a mask size.

10. The computer-implemented method of claim 1, wherein applying the scanning mask comprises:

moving the scanning mask for a predetermined number of cells that is less than a width of the scanning mask.

11. The computer-implemented method of claim 1, wherein applying the scanning mask comprises:

moving the scanning mask in a non-linear sequence.

12. The computer-implemented method of claim 9, wherein the mask size of the scanning mask comprises a mask size of N by M cells where N and M are positive integers and wherein a cell located at the center of the scanning mask is associated with a target cell of the scanning mask.

13. The computer-implemented method of claim 9, wherein the mask size of the scanning mask comprises a plurality of cells that are analyzed in the scanning mask prior to scanning of a target cell.

14. A touch controller comprising:

a touch sensor comprising nodes; and

a computer processor configured to;

receive labels of the nodes of the touch sensor capable of detecting a plurality of distinct regions that are touched, each label indicating whether an associated node has been touched;

assign label data to nodes that have been touched based on the labels and based on label data of adjacent nodes during a single scanning of the label data; and

group the labeled nodes into one or more touch regions based on the assigned label data.

15. The touch controller of claim 14, wherein the computer processor is further configured to:

for a target node indicated by the labels as being touched,

assign first label data to the target node responsive to an adjacent node of the target node previously assigned with the first label data; and

assign second label data to the target node responsive to any of nodes adjacent to the target node not previously assigned with a label data, the second label data indicative of a different touch region relative to the first label data.

16. The touch controller of claim 14, wherein the computer processor is further configured to:

assign initial values to the label data of the nodes of the touch sensor.

17. The touch controller of claim 14, wherein the computer processor is further configured to:

identify a first node that is adjacent to a target node that has been touched, the first node comprising first label data associated with a first value;

identify a second node that is adjacent to the target node, the second node comprising second label data associated with a second value that is greater than the first value of the first label data;

assign the first label data to the target node; and

update the second label data of the second node with the first value of the first label data.

18. The touch controller of claim 14, wherein the computer processor is further configured to:

add additional labels associated with nodes located at edges of the touch sensor, the additional labels indicating that associated nodes have not been touched.

19. The touch controller of claim 14, wherein the computer processor is further configured to:

apply a scanning mask to the labels, the scanning mask comprising a mask size.

20. The touch controller of claim 18, wherein the mask size of the scanning mask comprises a mask size of N by M cells where N and M are positive integers and wherein a cell located at the center of the scanning mask is associated with a target cell of the scanning mask.