Patent ID: 7154561

Claim:
A sharpness improvement apparatus of an image signal comprising: an image source processing unit for performing a predetermined image process by receiving an image signal; an analogue image processing unit for outputting R, G, and B signals which can be displayed by receiving the signal processed in the image source processing unit; a digital sharpness improvement unit for outputting an improved sharpness of an image signal having a highest level selected from a certain number of successive input digital signals converted from the R, G, and B signals processed by the analogue image processing unit; and a display unit for receiving the R, G, and B signals having an improved sharpness and then displaying on a screen, wherein the digital sharpness improvement unit includes: a sampling unit for receiving the R, G, and B signals and sampling according to a predetermined clock signal (MC); a parallel converter for storing the sampled signals into successively located respective data and thereby converting into a plurality of parallel data; a level selection unit for receiving the parallel-converted data, determining each level of the data, and thereby selecting a data having the highest level; and a digital/analogue converter for converting an output signal of the level selection unit into the R, G, and B signals of an analogue.