| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical detector that is responsive because it can widen an adjustment range of a light emitting element current and can reduce receiving time of light. <P>SOLUTION: When a display surface of a display unit is not light shielded by an object, a microcomputer 40 performs a plurality of times of received-light amount A/D conversion respectively for each light-receiving element by using a received-light amount voltage purging disturbance light via each light-receiving element outputted from a light-receiving processing circuit 39, as an input acquires each additional value by adding A/D conversion values for each light-receiving element by performing A/D conversion multide times on the received-light amount for each light-receiving element and stores the acquired value in a memory 41 of the microcomputer 40. Sensitivity is adjusted using each additional value in the memory 41 so as to uniform the received-light amount for each light receiving element, and then an operation is performed for detecting a light shielded position by an object on the display surface of the display unit. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
