Patent ID: 7250984
Filing Date: 2007-07-31
Classification: G09G,H04N

Abstract:
1. A VDT stress mitigating device that is provided between an image signal output device for outputting image signals based on an interlaced format and an image display device for displaying an image based on the image signal, and performs processing on the image signal in order to mitigate VDT stress, and comprises: filter means for performing a temporal filtering process on the image signals of each of a first and second field without any distinction being made between the first and second fields and while the temporal order of these fields is maintained wherein the filter means comprises: a signal importing section for sequentially importing the image signals in units of fields; a field dividing section for dividing each field of the image signals into a plurality of sub-fields; a low pass filter section for performing a temporal filtering process on image signals of each sub-field without distinguishing between the plurality of sub-fields and while maintaining the temporal order of the sub-fields, and for attenuating predetermined frequency components contained in an image formed by the image signals; a field synthesizing section for synthesizing image signals of each field from image signals of each sub-field in which the predetermined frequency components have been attenuated; and a signal output section for sequentially outputting in accordance with the temporal order the image signals of each field that have been synthesized by the field synthesizing section.