| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To cause a display device that allows the input of information using an optical sensor to properly control the sensitivity of the optical sensor according to external light. <P>SOLUTION: A calibration circuit 93 varies the requirements for driving the optical sensor according to output values of the optical sensor that vary depending on external light. In this way, the sensitivity of the optical sensor is appropriately controlled. The requirements for driving the optical sensor include at least either precharge time or exposure time. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
