Patent ID: 8164692
Filing Date: 2012-04-24
Classification: G09G,H04N

Abstract:
1. A gamma correction circuit comprising: a serial storage unit which serially stores first parameter information having a first gamma curve character for at least one of fields, and second parameter information having a second gamma curve character for at least one of other fields, which is different from the first gamma curve character, in a storage area; a first parallel storage unit which parallelly stores the first parameter information from the serial storage unit in the storage area; a second parallel storage unit which parallelly stores the second parameter information from the serial storage unit in the storage area; a gamma correction unit which receives a video signal and which performs gamma correction to the video signal based on the first parameter information or the second parameter information to output the video signal; and means for serially reading the first and the second parameter information from the serial storage unit; means for parallelly storing and preparing the first and the second parameter information in the first and second parallel storage units, respectively; and means for reading the first parameter information or the second parameter information from the first parallel storage unit or the second parallel storage unit in a blanking period in a vertical direction of the video signal, when a gamma correction curve character of the gamma correction unit is switched.