DETECTION METHOD AND DETECTING APPARATUS FOR DETECTING MULTIPLE TOUCH POINTS ON TOUCH PANEL

• US 20120075219A1
• Filed: 09/22/2011
• Published: 03/29/2012
• Est. Priority Date: 09/29/2010
• Status: Abandoned Application

• Current Assignee: Raydium Semiconductor Corporation
• Original Assignee: Raydium Semiconductor Corporation
• Inventors: Wu, Tung-Ke, Chou, Shih-Tzung, Chang, Shih-Chin
• Application Number:
  US13/239,397
• Publication Number:
  US 20120075219A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 plurality of contacts on a touch panel includes: generating a preliminary sensing data according to the contacts on the touch panel; determining a plurality of first specific sensing axes included in a plurality of first sensing axes and a plurality of f second specific sensing axes included in a plurality of second sensing axes according to the preliminary sensing data; utilizing a configuration circuit to configure a driving and receiving sequence of the plurality of first sensing axes and the plurality of second sensing axes for obtaining a first sensing data and a second sensing data; and utilizing a determining circuit to receive a completion instruction, wherein when the determining circuit receives the completion instruction, the determining circuit determines a touch detection result according to the first sensing data and the second sensing data.

Claims

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

generating a preliminary sensing data according to the contacts on the touch panel;

determining a plurality of first specific sensing axes included in the plurality of first sensing axes and a plurality of second specific sensing axes included in the plurality of second sensing axes according to the preliminary sensing data;

utilizing a configuration circuit to configure a driving and receiving sequence of the plurality of first sensing axes and the plurality of second sensing axes for obtaining a first sensing data and a second sensing data, comprising;

utilizing a driving circuit to drive the plurality first specific sensing axes one-by-one;

respectively receiving a sensing data corresponding to each of the plurality first specific sensing axes from the plurality of second sensing axes of the touch panel through a multiplexer, and accordingly obtaining the first sensing data;

storing the first sensing data in the storage element;

utilizing the driving circuit to drive the plurality second specific sensing axes one-by-one;

respectively receiving a sensing data corresponding to each of the plurality second specific sensing axes from the plurality of first sensing axes of the touch panel through a multiplexer, and accordingly obtaining the second sensing data; and

storing the second sensing data in the storage element; and

utilizing a determining circuit to receive a completion instruction, wherein when the determining circuit receives the completion instruction, the determining circuit determines a touch detection result according to the first sensing data and the second sensing data.

2. The detection method of claim 1, wherein the preliminary sensing data comprises a first preliminary sensing data and a second preliminary sensing data, the plurality first specific sensing axes are selected from the plurality of first sensing axes based on the first preliminary sensing data, the plurality second specific sensing axes are selected from the plurality of second sensing axes based on the second preliminary sensing data, and the step of generating the preliminary sensing data comprises:

concurrently driving the plurality of first sensing axes, and generating the first preliminary sensing data by respectively receiving a first sensing data corresponding to each of the plurality first sensing axes from the plurality of second sensing axes; and

concurrently driving the plurality of second sensing axes, and generating the second preliminary sensing data by respectively receiving a second sensing data corresponding to each of the plurality second sensing axes from the plurality of first sensing axes.

3. The detection method of claim 2, wherein the step of generating the first preliminary sensing data comprises:

generating the first preliminary sensing data according to first sensing data each exceeding a threshold value.

4. The detection method of claim 3, wherein the step of generating the second preliminary sensing data comprises:

generating the second preliminary sensing data according to second sensing data each exceeding the threshold value.

5. A detection device for detecting a plurality of contacts on a touch panel, the touch panel comprising a plurality of first sensing axes on a first dimension and a plurality of second sensing axes on a second dimension, the detection device comprising:

a driving circuit, for driving the plurality of first sensing axes and the plurality of second sensing axes;

a multiplexer, for receiving at least a sensing data corresponding to the plurality of first sensing axes and the plurality of second sensing axes;

a preliminary detection circuit, coupled to the driving circuit and the multiplexer, for utilizing the driving circuit and the multiplexer to generate a preliminary sensing data according to the contacts on the touch panel;

a sensing axis selection circuit, coupled to preliminary detection circuit, for determining a plurality first specific sensing axes in the plurality of first sensing axes and a plurality second specific sensing axes in the plurality of second sensing axes according to the preliminary sensing data;

a storage element;

a configuration circuit, coupled to the driving circuit, the multiplexer, the sensing axis selection circuit and the storage element, for configuring a driving and receiving sequence of the plurality of first sensing axes and the plurality of second sensing axes for obtaining a first sensing data and a second sensing data;

controlling the multiplexer to obtain a first sensing data by respectively receiving a sensing data corresponding to each of the plurality of first specific sensing axes from the plurality of second specific sensing axes of the touch panel after controlling the driving circuit to drive the plurality of first specific sensing axes one-by-one, and storing the first sensing data in the storage element;

and controlling the multiplexer to obtain a second sensing data by respectively receiving a sensing data corresponding to each of the plurality of second specific sensing axes from the plurality of first specific sensing axes of the touch panel after controlling the driving circuit to drive the plurality of second specific sensing axes one-by-one, and storing the second sensing data in the storage element; and

a determining circuit, coupled to the storage element, for receiving a completion instruction, wherein when the determining circuit receives the completion instruction, the determining circuit determines a touch detection result according to the first sensing data and the second sensing data in the storage element.

6. The detection device of claim 5, wherein:

the preliminary sensing data comprises a first preliminary sensing data and a second preliminary sensing data;

the sensing axis selection circuit selects the plurality first specific sensing axes from the plurality of first sensing axes based on the first preliminary sensing data, and selects the plurality second specific sensing axes from the plurality of second sensing axes based on the second preliminary sensing data; and

the driving circuit concurrently drives the plurality of first sensing axes, and the configuration circuit controls the multiplexer to respectively receive a first sensing data corresponding to each of the plurality of first sensing axes from the plurality of second sensing axes, to generate the first preliminary sensing data; and

the driving circuit concurrently drives the plurality of second sensing axes, and the configuration circuit controls the multiplexer to respectively receive a second sensing data corresponding to each of the plurality of second sensing axes from the plurality of first sensing axes, to generate the second preliminary sensing data.

7. The detection device of claim 6, wherein the preliminary detection circuit generates the first preliminary sensing data according to first sensing data each exceeding a threshold value.

8. The detection device of claim 7, wherein the preliminary detection circuit further generates the second preliminary sensing data according to second sensing data each exceeding the threshold value.