A display device performs the fractional part of gamma translation by using a logarithm lookup table. The logarithm of an image data value is found in a look-up table. The retrieved result is multiplied by the fractional portion of the power, and a search in the look up table for this product produces...http://www.google.com/patents/US7957589?utm_source=gb-gplus-sharePatent US7957589 - Arbitrary power function using logarithm lookup table
