DETECTION METHOD AND DETECTION CIRCUIT FOR DETECTING TOUCH EVENT ON TOUCH PANEL BY SELECTING NON-ADJACENT SENSING AXIS AS REFERENCE AXIS

• US 20120038574A1
• Filed: 08/11/2011
• Published: 02/16/2012
• Est. Priority Date: 08/11/2010
• Status: Abandoned Application

• Current Assignee: Raydium Semiconductor Corporation
• Original Assignee: Raydium Semiconductor Corporation
• Inventors: Chou, Shih-Tzung, Wu, Tung-Ke, Chang, Shih-Chin
• Application Number:
  US13/207,419
• Publication Number:
  US 20120038574A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A detection method for detecting a touch event on a touch panel includes a plurality of first sensing axes on a first dimension, and a plurality of second sensing axes on a second dimension. The detection method includes: regarding each first sensing axis, choosing another first sensing not neighboring with the first sensing axis as a first reference axis, and utilizing the first sensing axis and the first reference axis to derive a first sensing data corresponding to the first sensing axis; utilizing the second axes to derive a second sensing data corresponding to each second sensing axis; and utilizing first sensing data respectively corresponding to the first sensing axes and second sensing data respectively corresponding to the second sensing axes to derive a touch event detection result.

Claims

1. A detection method for detecting a touch event on a touch panel, the touch panel including a plurality of first sensing axes on a first dimension and a plurality of second sensing axes on a second dimension, respectively, the detection method comprising:

regarding each of the first sensing axes;

selecting a first sensing axis which is not adjacent to the first sensing axis as a first reference axis, and utilizing the first sensing axis and the first reference axis to obtain a first sensing data corresponding to the first sensing axis;

utilizing the second sensing axes to obtain a second sensing data corresponding to each of the second sensing axes; and

obtaining a touch event detection result according to a plurality of first sensing data respectively corresponding to the first sensing axes and a plurality of second sensing data respectively corresponding to the second sensing axes.

2. The detection method of claim 1, wherein the first reference axis and the first sensing axis are only separated by one first sensing axis.

3. The detection method of claim 1, wherein the step of utilizing the second sensing axes to obtain the second sensing data corresponding to each of the second sensing axes comprises:

regarding each of the second sensing axes;

selecting a second sensing axis which is not adjacent to the second sensing axis as a second reference axis, and utilizing the second sensing axis and the second reference axis to obtain the second sensing data corresponding to the second sensing axis.

4. The detection method of claim 3, wherein the first reference axis and the first sensing axis are only separated by one first sensing axis, and the second reference axis and the second sensing axis are only separated by one second sensing axis.

5. A detection circuit for detecting a touch event on a touch panel, the touch panel including a plurality of first sensing axes on a first dimension and a plurality of second sensing axes on a second dimension, respectively, the detection circuit comprising:

a scanning element, wherein regarding each of the first sensing axes, the scanning element selects a first sensing axis which is not adjacent to the first sensing axis as a first reference axis, and utilizes the first sensing axis and the first reference axis to obtain a first sensing data corresponding to the first sensing axis; and

the scanning element further obtains a second sensing data corresponding to each of the second sensing axis according to the second sensing axes; and

a determining element, coupled to the scanning element, for obtaining a touch event detection result according to a plurality of first sensing data respectively corresponding to the first sensing axes and a plurality of second sensing data respectively corresponding to the second sensing axes.

6. The detection circuit of claim 5, wherein the first reference axis and the first sensing axis are only separated by one first sensing axis.

7. The detection circuit of claim 5, wherein regarding each of the second sensing axis, the scanning element selects a second sensing axis which is not adjacent to the second sensing axis as a second reference axis, and utilizes the second sensing axis and the second reference axis to obtain the second sensing data corresponding to the second sensing axis.

8. The detection circuit of claim 7, wherein the first reference axis and the first sensing axis are only separated by one first sensing axis, and the second reference axis and the second sensing axis are only separated by one second sensing axis.