| 摘要 |
<p>PURPOSE: To provide an image display matching with an optional gradation display charactristic by providing a data conversion circuit converting the digital input video data of n bits to n+m bits and a digital data driver of n+m bits. CONSTITUTION: The digital image signal data 16 of (n) bits are converted to the digital image signal data of n+m bits by a data conversion circuit. At this time, aγcharacteristic correcting ROM 15 is used as the data conversion circuit. That is, aγcharacteristic of a liquid crystal is measured really, and when the address of the ROM is made the data of (n) bits of an input image signal, and the output is made the data of n+m bits converting to the requiredγcharacteristic beforehand, the data are converted successively simply. Thus, the digital input signal of n bits is converted successively to the digital data of n+m bits matching with theγcharacteristic of the liquid crystal by the ROM 15, and the gradation display by (n) bits is performed by using a digital data driver 2 of n+m bits.</p> |
