Patent ID: 8952932
Filing Date: 2015-02-10
Classification: G06F

Abstract:
1. A touch input sensing device using illumination sensors, comprising: a touch pad on which at least one illumination sensor which senses an illumination environment is arranged; a controller configured to collect sensor values of the at least one illumination sensor to calculate a present illumination environment value; and a gain amplifier configured to convert current generated by the at least one illumination sensor into voltage according to the present illumination environment value; wherein the controller set a threshold for touch determination using the present illumination environment value and perform touch recognition based on the set threshold, wherein the controller calculates of the present illumination environment value reads sensor values of the at least one illumination sensor, wherein the controller obtains a median of the sensor values of the at least one illumination sensor and averages medians per window size to calculate a present illumination environment value, or wherein the controller obtains a maximum value of the sensor values of the at least one illumination sensor and averages the maximum values per window size to calculate a present illumination environment value.