Image display unit
View Patent ↗An active matrix type display panel is a hold type display panel which has a plurality of pixels arranged in a matrix form, and holds and displays an electrical signal pixel by pixel for a predetermined time. A frame rate conversion circuit converts a video signal having a first vertical frequency (60 Hz) into a video signal having a second vertical frequency (120 Hz) which is m/n-fold (wherein m is an integer of 2 or more, n is an integer of 1 or more, and conditions of m>n are satisfied) of the first vertical frequency. A time base emphasizing circuit subjects an output from the frame rate conversion circuit to time base emphasis. A drive circuit displays the video signal having the second vertical frequency in a display panel.
1. An image display method for use in an image display unit including an active matrix type display panel, comprising:
writing a video signal having a first vertical frequency into an image memory at a first speed;
reading the video signal as image data from the image memory at a second speed which is m/n-fold (wherein m is an integer of 2 or more, n is an integer of 1 or more, and conditions of m>n are satisfied) of the first speed;
detecting a motion vector by using the image data read from the image memory;
performing motion compensation interpolation by using the image data read from the image memory and the motion vector so as to generate respective image data each being a video signal having a second vertical frequency which is m/n-fold of the first vertical frequency and shifted as much as one frame from the other;
emphasizing a high-zone component in a direction of the time base by using the output respective image data corresponding to at least two adjacent frames in the video signal having the second vertical frequency; and
displaying the video signal having the second vertical frequency and the emphasized high-zone component in the direction of the time base on the active matrix type display panel.
2. An image display method for use in an image display unit including an active matrix type display panel, comprising:
writing a video signal having a first vertical frequency into an image memory at a first speed;
reading the video signal as image data from the image memory at a second speed which is m/n-fold (wherein m is an integer of 2 or more, n is an integer of 1 or more, and conditions of m>n are satisfied) of the first speed;
detecting a motion vector by using the image data read from the image memory;
performing motion compensation interpolation by using the image data output from the image memory and the motion vector so as to generate a video signal having a second vertical frequency which is m/n-fold of the first vertical frequency and shifted as much as one frame from the other;
selecting the image data output from the image memory or the image data applied with the motion compensation interpolation so as to generate respective image data each being shifted as much as one frame from the other;
emphasizing a high-zone component in a direction of the time base by using the output respective image data corresponding to at least two adjacent frames in the video signal having the second vertical frequency; and
displaying the video signal having the second vertical frequency and the emphasized high-zone component in the direction of the time base on the active matrix type display panel.