Patent ID: 6046737
Filing Date: 2000-04-04
Classification: G09G

Abstract:
A display device, having a display screen, which receives display signals including at least a synchronous signal and a video signal transmitted at predetermined times relative to the synchronous signals and displays the video on the display screen, the display device comprising:an identification section for measuring a frequency or a cycle of the synchronous signal and for comparing the frequency or the cycle with predetermined first and second reference frequencies or cycles to identify a display mode which specifies the predetermined timing from a plurality of display modes with predetermined settings, said predetermined reference frequency or cycle defining a dividing point among the range of frequencies or cycles from one display mode to another display mode of said plurality of display modes so that when said measuring frequency or cycle is identified as being greater than or less than said first or second reference frequency or cycle, said one or said another display mode is identified as the correct display mode to provide a stable display, said second reference frequency or cycle being set by controlling the identification section to selectively change the reference frequency or cycle from said first reference frequency or cycle to said second reference frequency or cycle within the range between the display modes when said first reference frequency or cycle results in unstable display.