| 摘要 |
<p>In an active matrix display, data derived from at least two sequential frames of image data is compared. A backlight output light intensity is varied to change in response to a change in image content. The maximum rate of change of output light intensity away from a default output light intensity is greater than the maximum rate of change of output light intensity towards the default output light intensity. In this arrangement, a rapid change in backlight output is provided in response to a change in image content, particularly brightness, and a more gradual return to the default output is provided. The change to light output intensity is temporary, and the brightness preferably returns to the default even if the image content does not subsequently change.</p> |
