Patent ID: 8284175
Filing Date: 2012-10-09
Classification: G06F,G09G

Abstract:
1. A light pointing device employed in an input apparatus, wherein the input apparatus is an embedded-type touch panel having a plurality of sensors arranged by an array, the light pointing comprising: a signal receiving interface for receiving a system signal from the input apparatus, wherein the system signal is a vertical clock pulse; a driving circuit for generating a driving signal only during an effective light sensing time of the input apparatus; and a light emitting component for generating a flashing light source in response to the driving signal, wherein the light emitting component is driven to generate the flashing light source by the driving signal, and the sensors are only activated at the effective light sensing time to sense the flashing light; wherein the driving signal is synchronized with the vertical clock pulse, and a period of the driving signal is K times of that of the vertical clock pulse, where K is a positive integer and determined by a resolution of the sensors.