Ramp signal producing method, ramp signal producing apparatus, and liquid crystal drive/display apparatus

A liquid crystal display apparatus comprising:

• an up/down counter for either counting up or down a supplied clock signal to obtain a count value;
• amplitude amount converting means for converting the amplitude of said supplied clock signal into an amplitude value corresponding to the count value and for converting said amplitude value in such a manner that a change amount per one count value is increased during the counting down operation by said up/down counter without converting a frequency of the clock signal to a higher frequency and including bit shift means for shifting the count value in a bit shift mode during the counting down operation by said up/down counter for increasing the count value, thereby increasing the change amount of the amplitude value;
• ramp signal producing means for producing a ramp signal with an amplitude corresponding to said amplitude value;
• drive means for driving in an image signal level produced by clipping said image signal based on said ramp signal;
• and
• a liquid crystal display driven by said drive means to display an image thereon.