TOUCH-SENSING DEVICE AND TOUCH-SENSING METHOD WITH UNEXPECTED-TOUCH EXCLUSION

• US 20180039378A1
• Filed: 08/02/2017
• Published: 02/08/2018
• Est. Priority Date: 08/08/2016
• Status: Active Grant

• Current Assignee: Imagination Broadway Ltd., Salt International Corp.
• Original Assignee: Imagination Broadway Ltd., Salt International Corp.
• Inventors: LEE, SHANG-LI, Liao, Zong-Bin, Ting, Ko-Hao
• Granted Patent: US 10,606,408 B2
• Time in Patent Office: Days
• 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 3/04186 Touch location disambiguation
• 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
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A touch-sensing method with unexpected-touch exclusion includes detecting sensing area to obtain touch point; checking total number of detected points forming the touch point with first and second numbers; determining a touch of the touch point as normal touch when the total number is less than or equal to the first number; determining the touch of the touch point as invalid touch when the total number is greater than or equal to the second number; checking if the touch point belongs to an edge region or not when the total number is greater than the first number and less than the second number; determining the touch of the touch point as the invalid touch when the touch point does not belong to the edge region; and determining the touch of the touch point as an unknown touch when the touch point belongs to the edge region.

Claims

1. A touch-sensing method with unexpected-touch exclusion, comprising:

detecting a sensing area to obtain a touch point, wherein the touch point is formed by a plurality of detected points, and wherein a predetermined peripheral range of the sensing area is defined as an edge region;

checking a total number of the detected points of the touch point with a first number and a second number, wherein the second number is greater than the first number;

determining a touch operation of the touch point as a normal touch when the total number is less than or equal to the first number;

determining the touch operation of the touch point as an invalid touch when the total number is greater than or equal to the second number;

checking if the touch point belongs to the edge region or not when the total number is greater than the first number and less than the second number;

determining the touch operation of the touch point as the invalid touch when the touch point does not belong to the edge region; and

determining the touch operation of the touch point as an unknown touch when the touch point belongs to the edge region.

2. The touch-sensing method according to claim 1, wherein when the touch operation of the touch point is determined as the unknown touch, checking a determination record of a previous scan circle of the touch point, and wherein when the determination record of the previous scan circle of the touch point is untouched, changing the touch operation of the touch point from the unknown touch to the invalid touch.

3. The touch-sensing method according to claim 1, further comprising:

calculating a consecutive times for continuously determining the touch operation of the touch point as the normal touch when the touch operation of the touch point is determined as the normal touch; and

outputting position information of the touch point according to a times threshold value and the consecutive times.

4. The touch-sensing method according to claim 3, wherein when the touch point is in a reporting state and when the touch operation of the touch point in a plurality of continuous scan circles is determined as the invalid touch, the unknown touch, or undetected, stopping outputting the position information of the touch point.

5. The touch-sensing method according to claim 1, further comprising:

recording a determined result of the touch operation of the touch point of a current scan circle;

checking the determined result of the touch operation of the touch point of a previous scan circle; and

performing a point report for the touch point determined as the normal touch according to the determined result of the current scan circle and the determined result of the previous scan circle.

6. The touch-sensing method according to claim 1, wherein the sensing area is defined by a plurality of first electrode lines and a plurality of second electrode lines, the edge region is defined by several of the first electrode lines near a first side of the sensing area, and several of the first electrode lines near a second side of the sensing area, as well as several of the second electrode lines near a third side of the sensing area, and several of the second electrode lines near a fourth side of the sensing area.

7. A touch-sensing device, comprising:

a plurality of first electrode lines;

a plurality of second electrode lines intersected with the first electrode lines, wherein the first electrode lines and the second electrode lines define a plurality of detected points configured as an array, and the detection points form a sensing area, a predetermined peripheral range of the sensing area is defined as an edge region; and

a sensing controller electrically connected to the first electrode lines and the second electrode lines, wherein the sensing controller executes;

detecting the sensing area to obtain a touch point, wherein the touch point is formed by a number of detected points;

checking a total number of the detected points of the touch point with a first number and a second number, wherein the second number is greater than the second number;

determining a touch operation of the touch point as a normal touch when the total number is less than or equal to the first number;

determining the touch operation of the touch point as an invalid touch when the total number is greater than or equal to the second number;

checking if the touch point belongs to the edge region or not when the total number is greater than the first number and less than the second number;

determining the touch operation of the touch point as an invalid touch when the touch point does not belong to the edge region; and

determining the touch operation of the touch point as an unknown touch when the touch point belongs to the edge portion.

8. The touch-sensing device according to claim 7, wherein when the touch operation of the touch point is determined as the unknown touch and when a determination record of a previous scan circle of the touch point is untouched, the sensing controller changes the touch operation of the touch point from the unknown touch to the invalid touch.

9. The touch-sensing device according to claim 7, wherein when the touch operation of the touch point is determined as the normal touch, the sensing controller calculates a consecutive times for continuously determining the touch operation of the touch point as the normal touch when the touch operation of the touch point is determined as the normal touch, and the sensing controller outputs position information of the touch point when the consecutive times achieves a times threshold value.

10. The touch-sensing device according to claim 9, wherein when the touch point is in a reporting state and the touch operation of the touch point in a plurality of continuous scan circles is determined as the invalid touch, the unknown touch, or undetected, the sensing controller stops outputting the position information of the touch point.

11. The touch-sensing device according to claim 7, wherein when both determined results of the touch operation of the touch point of a current scan circle and of a previous scan circle are not the normal touch, the sensing controller does not output position information of the touch point.

12. The touch-sensing device according to claim 7, wherein the edge region is a partial sensing area comprising several of the first electrode lines near a first side of the sensing area, and several of the first electrode lines near a second side of the sensing area, as well as several of the second electrode lines near a third side of the sensing area, and several of the second electrode lines near a fourth side of the sensing area.