US Patent No. 9,489,123

METHOD FOR SENSING TOUCH PRESSURE AND DIGITAL DEVICE USING THE SAME


Patent No. 9,489,123
Issue Date November 08, 2016
Title Method For Sensing Touch Pressure And Digital Device Using The Same
Inventorship Seung Il Kim, Seoul (KR)
Assignee WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Seoul (KR)

Claim of US Patent No. 9,489,123

1. A method for sensing touch pressure, comprising: obtaining image data sensed by a camera unit of a digital device;
obtaining an ambient illumination value around the digital device, the ambient
illumination value being sensed by an illumination sensor of the digital device; extracting color information for the image
data; determining whether a touch input has been performed on the camera unit; and estimating a touch pressure of the touch
input based on both of the extracted color information and the obtained ambient illumination value, when it is determined
that the touch input has been performed in the determination step,

wherein the estimated touch pressure is proportional to at least one component value in the color information,
wherein the estimating step establishes a sensitivity of the touch pressure corresponding to a variation of the at least one
component value lower, as the obtained ambient illumination value is higher.