| 摘要 |
<p>PURPOSE:To exclude the effect of an external disturbance light by driving a turning means so that each light receiving element does not receive effect of external disturbance light to turn a prescribed end of an image display means thereby controlling variably an angle of a display screen. CONSTITUTION:First and second motor drive circuits 19, 20 are provided to drive respectively an up/down drive motor 17 and a left/right drive motor 18, and when a CPU 13 discriminates it that a light receiving element 4 receives an external disturbance light, both the motor drive circuits 19, 20 are operated by a control signal from the CPU 13 to drive both the motors 17,18. Each end of an image display means is driven in the forward/backward direction through the driving to control variably an angle of an image display means so as not to receive effect of an external disturbance light. Thus, the effect of the external disturbance light is surely excluded.</p> |
