An image display apparatus is provided for receiving a digital image signal and displaying it so that high-quality images can be displayed with the noise reduced not to be conspicuous and with the contour appropriately corrected. The base station antenna protection system receives a wind moving in a direction, and comprises a base station antenna, a sensor, a protective surface and a rotatory device. Through this configuration, a CPU can be shielded from the heat and electromagnetic interference generated by with a high-performance component. The first sub-pixel and the second sub-pixel have substantially the same length. A further embodiment presents a horizontally-moving armature actuated by one or more solenoids.