DETECTION METHOD FOR ENHANCED 3D DETECTION MODULE

• US 20170010729A1
• Filed: 07/10/2016
• Published: 01/12/2017
• Est. Priority Date: 07/10/2015
• 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, Shuo-Wen, Chuang, Chih-Cheng, Cheng, Tai-Shih
• Granted Patent: US 10,318,037 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 3/0414 using force sensing means to determine a position
• 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

A detection method for enhanced 3D detection module includes a plurality of touch units configured to sense positions of touch points, a plurality of pressure-sensitive units configured to sense pressing forces and a signal processing circuit, the detection method including: providing a touch scanning pulse to the plurality of touch units and providing a pressure scanning pulse to at least two of the pressure-sensitive units; generating touch signals by the plurality of touch units in response to the touch scanning pulse sensing the positions of the touch points and generating a superimposed pressure signal by the at least two of the pressure-sensitive units in response to the pressure scanning pulse sensing the pressing forces; and determining a position and a pressing force value of at least one touch point by the signal processing circuit according to the superimposed pressure signal and the touch signals.

Claims

1. A detection method for enhanced 3D detection module, wherein the enhanced 3D detection module comprises a plurality of touch units configured to sense positions of touch points, a plurality of pressure-sensitive units configured to sense pressing forces and a signal processing circuit, the detection method comprising:

step 1;

providing a touch scanning pulse to the plurality of touch units;

providing a pressure scanning pulse to at least two of the pressure-sensitive units;

step 2;

generating touch signals by the plurality of touch units in response to the touch scanning pulse sensing the positions of the touch points;

generating a superimposed pressure signal by the at least two of the pressure-sensitive units in response to the pressure scanning pulse sensing the pressing forces; and

step 3;

determining a position and a pressing force value of at least one touch point by the signal processing circuit according to the superimposed pressure signal and the touch signals.

2. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the at least two of the pressure-sensitive units are disposed on a same plane, and the at least two of the pressure-sensitive units are independent and adjacent to each other.

3. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the at least two of the pressure-sensitive units are disposed on a same plane, and the at least two of the pressure-sensitive units are connected in series.

4. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the at least two of the pressure-sensitive units are disposed on a first pressure-sensitive layer and a second pressure-sensitive layer respectively, and are disposed oppositely to each other, in translational displacement, in a staggered manner, or in a complementary manner in vertical projection direction.

5. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the pressure scanning pulse of the at least two of the pressure-sensitive units and the touch scanning pulse are generated at different time periods, the at least two of the pressure-sensitive units receive the same pressure scanning pulse or receive two independent pressure scanning pulses respectively, the independent pressure scanning pulses are generated at the same time period or generated at different time periods.

6. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the pressure scanning pulse of the at least two of the pressure-sensitive units and the touch scanning pulse are generated at an identical time period, and potential switching points of the pressure scanning pulse and the touch scanning pulse are staggered.

7. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the at least two of the pressure-sensitive units are respectively chosen from vertically or horizontally adjacent two sets of pressure-sensitive units, each of the sets of pressure-sensitive units comprises at least one pressure-sensitive unit, the pressure scanning pulse of the at least two of the pressure-sensitive units and the touch scanning pulse are generated at different time periods, and potential switching points of the pressure scanning pulse and the touch scanning pulse are staggered.

8. The detection method for enhanced 3D detection module of claim 1, wherein in the step 2, the at least two of the pressure-sensitive units are a plurality of pressure-sensitive units, the plurality of pressure-sensitive units are respectively disposed on a first pressure-sensitive layer and a second pressure-sensitive layer, the plurality of pressure-sensitive units disposed on the first pressure-sensitive layer and the second pressure-sensitive layer respectively are divided into groups and the pressure-sensitive units of each group are connected in series, each group of pressure-sensitive units comprises at least two pressure-sensitive units.

9. The detection method for enhanced 3D detection module of claim 8, wherein in the step 2, at least one pressure-sensitive unit of the at least two of the pressure-sensitive units is disposed on the first pressure-sensitive layer, and at least one another pressure-sensitive unit is disposed on the second pressure-sensitive layer, the pressure scanning pulse of the at least one pressure-sensitive unit on the first pressure-sensitive layer and the pressure scanning pulse of the at least one another pressure-sensitive unit on the second pressure-sensitive layer are generated at the same time period.

10. The detection method for enhanced 3D detection module of claim 1, wherein the enhanced 3D detection module comprises a display module, the display module comprises a plurality of pixel units driven by a pixel scanning pulse, the pixel scanning pulse and the pressure scanning pulse are generated at the same time period, the pixel scanning pulse and the touch scanning pulse are generated at the same time period.

11. The detection method for enhanced 3D detection module of claim 10, wherein the enhanced 3D detection module comprises a driver, the driver provides the pixel scanning pulse, the pressure scanning pulse and the touch scanning pulse directly or indirectly.

12. The detection method for enhanced 3D detection module of claim 10, wherein the frequency of the pixel scanning pulse is Fg, the frequency of the touch scanning pulse is Ft, and the frequency of the pressure scanning pulse is Ff, wherein Fg>

Ft>

Ff, Fg=(1˜

20)Ft, Fg=(1˜

50)Ff.