Multi synchronous and multi resolution interpolation method in digital dynamic convergence control system

摘要

PURPOSE: A method for interpolating multi-synch and multi-resolution in a digital dynamic convergence control system is provided to adjust a compensation voltage corresponding to changes of synch frequencies and a change of resolution without operating data of a memory or increasing capacity of the memory. CONSTITUTION: A change in the number of horizontal synchronous signals is detected and recognized during one period of vertical synchronous signals. A change quantity of the horizontal synchronous signals is calculated. The number of increment lines and increment data of interpolation data are calculated according to the change quantity. The interpolation data are changed based on the calculated number of increment lines and increment data to output a compensation voltage.