Patent ID: 8068086
Filing Date: 2011-11-29
Classification: G09G

Abstract:
1. A gamma-reference-voltage generating circuit comprising: a first resistor string including a plurality of resistors for outputting a plurality of first polarity gamma-reference-voltages; a second resistor string including a plurality of resistors for outputting a plurality of second polarity gamma-reference-voltages; a first thermal compensation section exhibiting a resistance value that varies as a function of an increase of temperature, the first thermal compensation section including a first end electrically connected to a first terminal for providing a first source of voltage and a second end electrically connected to the first resistor string; and a second thermal compensation section exhibiting a resistance value that varies as a function of an increase of temperature, the second thermal compensation section including a first end electrically connected to a second terminal for providing a second source of voltage having a magnitude which is less than the magnitude of the first source of voltage, and a second end electrically connected to the second resistor string, wherein the resistors of the first resistor string are connected in series and the resistors of the second resistor string are connected in series, and the first and second resistor strings and the first and second thermal compensation sections are connected to each other in series.