| 摘要 |
<p>An image display apparatus includes a sync signal outputting unit (10) that generates a first sync signal based on an input signal from an input source (2), an internal sync signal generating unit (20) that generates a second sync signal based on stored frequency information relating to the input source (2) and a switching unit (30) that selectively provides one of the first and second sync signals to an image output unit (50). When the apparatus is switched, to receive an input signal from a new input source (1), an updated second sync signal, based on stored information relating to the new input source (1), is used to adapt the driving speed of a colour wheel (56) while an updated first sync signal, based on the frequency of the new input signal, is generated. This allows the updated first sync signal to be generated during stabilisation of the colour wheel (56) at its new driving speed, thereby reducing transition time.</p> |
