Patent ID: 6335728
Filing Date: 2002-01-01
Classification: G09G,H04N

Abstract:
A driving apparatus of a display panel, comprising:a television signal receiving circuit for receiving a television broadcasting wave, generating a video signal, and enabling a receiving station to be changed in accordance with an instruction; a sync signal separating circuit for detecting a sync signal from said video signal; an A/D converter for obtaining corresponding pixel data every pixel by sampling said video signal; first and second memories each having a capacity to store at least pixel data of one field; self-advancing clock signal generating means for generating a self-advancing clock signal, said self-advancing clock signal having a frequency identical with said sync signal, and generated independently of said sync signal so that synchronization between said self-advancing clock signal and said sync signal is absent; control means for controlling said first and second memories so as to write the pixel data of one field alternately into said first and second memories and read the written pixel data of one field alternately from said first and second memories in response to said self-advancing clock signal; and display driving means for driving the display panel on the basis of the pixel data, which is read out from, said first and second memories, wherein said control means switches the writing and reading operations of each of said memories synchronously with said self-advancing clock signal each time that is twice or more as long as a generating period of said self-advancing clock signal and writes the pixel data of one field alternately into each of said memories for each of a plurality of fields in response to said sync signal which is detected just after said each of said memories has been switched from the reading to the writing, and said control means reads the pixel data written synchronously with said self-advancing clock signal and supplies it to said display driving means.