Patent ID: 7777759
Filing Date: 2010-08-17
Classification: G09G,H04N

Abstract:
1. An image processing apparatus, comprising: a first signal processing circuit for converting an n-bit (n: a natural number) digital signal inputted as a video signal, into an m-bit (m>n, m: a natural number) digital signal, the n-bit digital signal expressing tone gradation of 2 a second signal processing circuit for adding a noise signal to the m-bit digital signal inputted from said first signal processing circuit, rounding down a less significant (m−Q) bit (Q≦n, Q: a natural number) from the m-bit digital signal having added thereto the noise signal, and outputting the resulting Q-bit digital signal to liquid crystal display means capable of a Q-bit display; wherein the noise signal varies not slower than a response speed of the liquid crystal display means; and wherein the second signal processing circuit outputs the Q-bit digital signal from the first signal processing circuit to a liquid crystal display means for displaying a Q-bit digital signal, and the noise signal changes at a higher speed than a response speed of the liquid crystal display means.