Patent ID: 7978157
Filing Date: 2011-07-12
Classification: G09G

Abstract:
1. An electro-luminescence display device, comprising: a red reference gamma generator, a green reference gamma generator and a blue reference gamma generator each having three digital analog converters or more in order to generate a reference gamma voltage of low gray level and a reference gamma voltage of high gray level; and at least one integrated circuit to generate a data signal in use of the reference gamma voltage of low gray level and the reference gamma voltage of high gray level, wherein each of the red, green and blue reference gamma generators includes: a first digital analog converter to divide a voltage supplied to itself in order to generate i (i is a natural number) numbers of voltage levels; a second digital analog converter to divide a voltage supplied to itself in order to generate j (j is a smaller natural number than i) numbers of voltage levels; and a third digital analog converter to receive two voltage levels from the second digital analog converter and to divides the two received voltage levels into j numbers of voltage levels.