Display apparatus

Details Display apparatus Display apparatus

2006-12-05

2006-12-05

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Display driving control circuitry

Intensity or color driving control

C345S691000, C345S213000

Reexamination Certificate

active

07145579

ABSTRACT:
In a display apparatus that receives and then displays R, G, B signals transmitted from a computer via a cable, when correcting phase differences between the respective signals that are generated while the signals are being transmitted, the phase correction amount can be reduced and phase adjustment performed automatically by a simple circuit structure. In a phase detection section, the phases of R, G, B signals input from a PC relative to a horizontal synchronization signal HD are detected, and based on the result of these detections, a calculation section11determines which color signal from the R, G, B signals has the greatest delay relative to the horizontal synchronization signal HD, and also determines the phase differences of the remaining two signals relative to the most delayed signal. A control section then performs control such that the delay amount of the delay circuit of the most delayed color signal out of the delay circuits is set to zero, and the delay amounts of the delay circuits of the remaining two color signals are controlled in accordance with the above phase differences.

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