Method for calibrating sensitivity of touch input devices sensing touch pressure, and computer readable recording medium

• US 10,331,268 B2
• Filed: 05/25/2016
• Issued: 06/25/2019
• Est. Priority Date: 06/01/2015
• Status: Active Grant

• Current Assignee: HiDeep Inc.
• Original Assignee: HiDeep Inc.
• Inventors: Kim, Tae Hoon, Yoon, Sang Sic, Kim, Se Yeob, Kim, Bon Kee, Moon, Ho Jun, Kwak, Seon Dong
• Primary Examiner(s): Lin, Hang
• Application Number:
  US15/562,666
• Publication Number:
  US 20180088732A1
• Time in Patent Office: 1,126 Days
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A sensitivity compensation method of a touch input device sensing a touch pressure may be provided. The sensitivity compensation method includes: detecting a capacitance change amount by applying a pressure to a plurality of points defined on a touch sensor panel; generating a raw data for the capacitance change amount of the defined point; generating a decimal value data for each of the sets by dividing a data value within the set by a maximum value within the set; calculating an average value of each defined point; generating a representative value data by calculating a value corresponding to all the points of the touch sensor panel; calculating a balance factor on the basis of the representative value data; and compensating for a touch pressure sensitivity of the touch input device by using the balance factor.

Claims

1. A sensitivity compensation method of a touch input device sensing a touch pressure, the sensitivity compensation method comprising:

detecting, in a plurality of touch input device sets, a capacitance change amount by applying a pressure to a plurality of points defined on a touch sensor panel provided in the touch input device;

generating a raw data for the capacitance change amount of the defined point, on the basis of the detected capacitance change amount;

generating a decimal value data for each of the sets by dividing a data value within the set by a maximum value within the set;

calculating an average value of each defined point, on the basis of the decimal value data generated for each of the sets;

generating a representative value data by calculating a value corresponding to all the points of the touch sensor panel, on the basis of the average value of each point;

calculating a balance factor on the basis of the representative value data; and

compensating for a touch pressure sensitivity of the touch input device by using the balance factor.

2. The sensitivity compensation method of claim 1, further comprising calibrating, by the following equation, the capacitance change amount which is detected in the touch input device compensated in the compensating,

3. The sensitivity compensation method of claim 1, further comprising calibrating, by the following equation, the capacitance change amount which is detected in the touch input device compensated in the compensating,

Z=Diffsum+(Target−

Center800 g diff)

(“

Z”

;

a value of a corresponding point after the calibration, “

Diffsum”

;

the capacitance change amount detected at the corresponding point before the calibration, “

Target”

;

a target value, “

Center800 g diff”

;

the capacitance change amount detected at a center point (a point located at the center of the touch sensor panel) before the calibration).

4. The sensitivity compensation method of claim 1, further comprising calibrating, by the following equation, the capacitance change amount which is detected in the touch input device compensated in the compensating,

5. The sensitivity compensation method of claim 1, further comprising calibrating, by the following equation, the capacitance change amount which is detected in the touch input device compensated in the compensating,

6. The sensitivity compensation method of claim 1, further comprising calibrating, by the following equation, the capacitance change amount which is detected in the touch input device compensated in the compensating,

7. The sensitivity compensation method of claim 1, wherein, in the generating a raw data, an average value of a frame which corresponding to a saturated section in a frame data measured in the plurality of defined points is calculated and is determined as the capacitance change amount of the corresponding point.

8. The sensitivity compensation method of claim 1, wherein, in the generating a representative value data, a random point other than the plurality of points is interpolated on the basis of the average value of the plurality of defined points, so that an average value of the random point is calculated.

9. The sensitivity compensation method of claim 1, wherein the pressure which is applied to the plurality of defined points is a pressure by 800 g and 8 phi.

10. The sensitivity compensation method of claim 1, wherein the plurality of defined points consist of 45 points consisting of five horizontal points and nine vertical points.

11. The sensitivity compensation method of claim 1, wherein, in the calculating a balance factor, the balance factor is calculated by multiplying the representative value data by a predetermined factor “

A”

.

17. A non-transitory computer readable recording medium recording a program which performs the sensitivity compensation method disclosed in claim 1.

12. A sensitivity compensation method of a touch input device sensing a touch pressure, the sensitivity compensation method comprising:

detecting a capacitance change amount according to a pressure which is applied to the touch input device; and

calibrating the detected capacitance change amount by the following equation,

13. A sensitivity compensation method of a touch input device sensing a touch pressure, the sensitivity compensation method comprising:

detecting a capacitance change amount according to a pressure which is applied to the touch input device; and

calibrating the detected capacitance change amount by the following equation,

Z=Diffsum+(Target−

Center800 g diff)

(“

Z”

;

a value of a corresponding point after the calibration, “

Diffsum”

;

the capacitance change amount detected at the corresponding point before the calibration, “

Target”

;

a target value, “

Center800 g diff”

;

the capacitance change amount detected at a center point (a point located at the center of the touch sensor panel) before the calibration).

14. A sensitivity compensation method of a touch input device sensing a touch pressure, the sensitivity compensation method comprising:

detecting a capacitance change amount according to a pressure which is applied to the touch input device; and

calibrating the detected capacitance change amount by the following equation,

15. A sensitivity compensation method of a touch input device sensing a touch pressure, the sensitivity compensation method comprising:

detecting a capacitance change amount according to a pressure which is applied to the touch input device; and

calibrating the detected capacitance change amount by the following equation,

16. A sensitivity compensation method of a touch input device sensing a touch pressure, the sensitivity compensation method comprising:

detecting a capacitance change amount according to a pressure which is applied to the touch input device; and

calibrating the detected capacitance change amount by the following equation,