Patent ID: 7630017
Filing Date: 2009-12-08
Classification: H04N

Abstract:
1. An on-screen display circuit for generating a processed image through which an original image is displayed as a background at a designated region, the on-screen display circuit comprising: a region designating signal generating portion for generating a region indicating signal indicating a signal time period in correspondence with the designated region; and an image signal processing portion for generating chrominance-removed image signals by removing chrominance components from an original image signal for respective component colors of the image and generating a processed image signal for the respective component colors based on the chrominance-removed image signals, in accordance with the region designating signal wherein the image signal processing portion includes an intensity adjusting portion capable of individually setting intensities of the chrominance-removed image signals for the respective component colors wherein the intensity adjusting portion comprises: an attenuator for uniformly attenuating gains of the chrominance-removed image signals for the respective component colors; and a level shifter connected in series with the attenuator and capable of individually setting offset levels of the chrominance-removed image signals for the respective component colors.