Patent ID: 8310500

Claim:
A method for a gamma value look-up table in a memory of an electronic device, comprising: storing gamma values corresponding to grays exceeding or equaling a 33rd gray in the gamma value look-up table of the electronic device; and calculating gamma values corresponding to a 1st gray to a 32nd gray by a formula, wherein the gamma values corresponding to the 1st gray to the 32nd gray are expressed as the formula: gamma ⁡ ( i ) = gamma ⁡ ( 256 ) × ( i 256 ) γ + ( gamma ⁡ ( 33 ) - gamma ⁡ ( 256 ) × ( 32 256 ) γ 32 ) × i , where, i denotes a gray, i exceeds or equals 1 and is less than or equal to 32, gamma(i) denotes a gamma value corresponding to an ith gray, gamma(256) denotes a gamma value corresponding to the 256th gray, gamma(33) denotes a gamma value corresponding to the 33rd gray, and γ denotes a parameter exceeding or equaling 1.8 and less than or equal to 2.4.