Capacitive touch control device and method thereof

• US 20090283340A1
• Filed: 08/13/2008
• Published: 11/19/2009
• Est. Priority Date: 05/13/2008
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Wang, Ching-Yi, Liu, Chen-Yu
• Granted Patent: US 8,487,198 B2
• Time in Patent Office: Days
• US Class Current: 178/18.60
• 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
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard

Abstract

Disclosed are a capacitive touch control device and a method thereof. A top face of a substrate is provided with first and second electrode groups, which each include a plurality of strip-like electrodes spaced from each other by a preset distance. The electrodes of the first and second electrode groups are respectively connected by first and second group scanning lines to a scanning circuit. When the first group scanning lines drive the electrodes of the first electrode group, the second group scanning lines carry out scanning operation on the electrodes of the second electrode group, and when the second group scanning lines drive the electrodes of the second electrode group, the first group scanning lines carry out scanning operation on the electrodes of the first electrode group. And, a touch location can thus be determined by using a microprocessor.

Claims

1. A capacitive touch control device comprising:

a substrate having a touch control operation surface;

a first electrode group comprising a plurality of electrodes arranged on the touch control operation surface of the substrate and respectively connected to first group scanning lines, the electrodes being spaced from each other by a preset distance, which defines an interval area;

a second electrode group comprising a plurality of electrodes respectively arranged in the interval areas between the electrodes of the first electrode group and respectively connected to second group scanning lines;

wherein when the first group scanning lines drive the electrodes of the first electrode group, the second group scanning lines carry out scanning operation on the electrodes of the second electrode group, and wherein when the second group scanning lines drive the electrodes of the second electrode group, the first group scanning lines carry out scanning operation on the electrodes of the first electrode group.

2. The capacitive touch control device as claimed in claim 1, wherein the electrodes of the first electrode group and the second electrode group are made of transparent conductive materials.

3. The capacitive touch control device as claimed in claim 1, wherein the first group scanning lines and the second group scanning lines are made of transparent conductive materials.

4. The capacitive touch control device as claimed in claim 1, wherein the electrodes of the second electrode group are parallel to the electrodes of the first electrode group.

5. A scanning method of a capacitive touch control device for detecting a touch location of the touch control device, the touch control device comprising a substrate having a touch control operation surface on which first and second electrode groups are arranged, the first electrode group comprising a plurality of electrodes respectively connected to first group scanning lines, the electrodes being spaced from each other by a preset distance, which defines an interval area, the second electrode group comprising a plurality of electrodes respectively arranged in the interval areas between the electrodes of the first electrode group and respectively connected to second group scanning lines, the method comprising the following steps:

(a) within a first time interval, using the first group scanning lines to drive each electrode of the first electrode group;

(b) at the same time when the first group scanning lines drive each electrode of the first electrode group, the second group scanning lines carries out scanning operation in a given scanning mode on each electrode of the second electrode group;

(c) within a second time interval, using the second group scanning lines to drive each electrode of the second electrode group;

(d) at the same time when the second group scanning lines drive each electrode of the second electrode group, the first group scanning lines carries out scanning operation in the given scanning mode on each electrode of the first electrode group; and

(e) repeating steps (a) to (d).

6. The method as claimed in claim 5, wherein in steps (b) and (d), the give scanning mode comprise using the second group scanning lines to carry out a sequential scanning operation on an end of each electrode of the second electrode group.

7. The method as claimed in claim 5, wherein the electrodes of the second electrode group are parallel to the electrodes of the first electrode group.