Patent ID: 8970555
Filing Date: 2015-03-03
Classification: G06F,G06K,H04N

Abstract:
1. A brightness control method of an optical touch panel, comprising: enabling a light source unit of the optical touch panel to emit at a first light intensity in a touch control mode; detecting an intensity of the light emitted by the first light source; switching the touch panel into a scan mode in response to the detected intensity; and enabling the light source unit to emit at a second light intensity in the scan mode, wherein a switching condition is based on the light emitted by the first light source intensity that is reflected so as to form a wide area shadow on the optical touch panel, and the wide area shadow covers a plurality of shadow pixels, and numbers of the shadow pixels are greater than a threshold value or a ratio of the shadow pixels accounted for a total number of the pixels are greater than the threshold value.