HOLD-TYPE IMAGE DISPLAY APPARATUS AND DISPLAY METHOD USING THE HOLD-TYPE IMAGE DISPLAY APPARATUS
First Claim
1. A hold-type image display apparatus comprising:
- a display panel having a plurality of display devices; and
an image processing circuit which generates an output video signal, including a main-frame image corresponding to an original image included in an input video signal and a sub-frame image generated by interpolation of the original image, from the input video signal, and, outputs the output video signal to the display panel with a higher frame frequency than the frame frequency of the input video signal,whereinthe image processing circuit has a luminance control unit which controls a display luminance of each frame image of the output video signal according to the frame frequency of the output video signal, andwhen the frame frequency of the output video signal is Io and the display luminance of the sub-frame image is B (the sum of the display luminance of the main-frame image and the display luminance of the sub-frame image is 1, and, 0<
B<
0.5), the luminance control unit determines, with regard to at least the display luminance corresponding to the maximum gradation, the ratio of the display luminance between the main-frame image and the sub-frame image so that the frequency In calculated by B=(2/3)×
(1−
(Io/2In)2) is equal to or more than 65 Hz and equal to or less than 80 Hz.
1 Assignment
0 Petitions
Accused Products
Abstract
An image processing circuit generates an output video signal from an input video signal and outputs the output video signal to a display panel with a higher frame frequency than the frame frequency of the input video signal. The output video signal includes a main-frame image and a sub-frame image. The image processing circuit has a luminance control unit. When the frame frequency of the output video signal is Io, and the display luminance of the sub-frame is B (0<B<0.5), the luminance control unit determines the ratio of the display luminance between the main-frame image and the sub-frame image so that the frequency In calculated by B=(2/3)×(1−(Io/2In)2) is equal to or more than 65 Hz and equal to or less than 80 Hz.
25 Citations
9 Claims
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1. A hold-type image display apparatus comprising:
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a display panel having a plurality of display devices; and an image processing circuit which generates an output video signal, including a main-frame image corresponding to an original image included in an input video signal and a sub-frame image generated by interpolation of the original image, from the input video signal, and, outputs the output video signal to the display panel with a higher frame frequency than the frame frequency of the input video signal, wherein the image processing circuit has a luminance control unit which controls a display luminance of each frame image of the output video signal according to the frame frequency of the output video signal, and when the frame frequency of the output video signal is Io and the display luminance of the sub-frame image is B (the sum of the display luminance of the main-frame image and the display luminance of the sub-frame image is 1, and, 0<
B<
0.5), the luminance control unit determines, with regard to at least the display luminance corresponding to the maximum gradation, the ratio of the display luminance between the main-frame image and the sub-frame image so that the frequency In calculated by B=(2/3)×
(1−
(Io/2In)2) is equal to or more than 65 Hz and equal to or less than 80 Hz. - View Dependent Claims (2)
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3. A hold-type image display apparatus comprising:
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a display panel having a plurality of display devices; and an image processing circuit which generates an output video signal, including a main-frame image corresponding to an original image included in an input video signal and a sub-frame image generated by interpolation of the original image, from the input video signal, and, outputs the output video signal to the display panel with a higher frame frequency than the frame frequency of the input video signal, wherein the image processing circuit has a luminance control unit which controls a display luminance of each frame image of the output video signal, with regard to at least the display luminance corresponding to the maximum gradation, the luminance control unit renders the display luminance of the sub-frame image smaller than the display luminance of the main-frame image, and the ratio of the display luminance between the main-frame image and the sub-frame image is constant regardless of the input video signal. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A display method using a hold-type image display apparatus, which includes a display panel having a plurality of display devices, comprising the steps of:
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generating, from an input video signal, an output video signal that includes a main-frame image, corresponding to an original image included in the input video signal, and a sub-frame image generated by interpolation of the original image; controlling a display luminance of each frame image of the output video signal according to a frame frequency of the output video signal; and outputting the output video signal to the display panel with a higher frame frequency than the frame frequency of the input video signal, wherein when the frame frequency of the output video signal is Io and the display luminance of the sub-frame image is B (the sum of the display luminance of the main-frame image and the display luminance of the sub-frame image is 1, and, 0<
B<
0.5), with regard to at least the display luminance corresponding to the maximum gradation, the ratio of the display luminance between the main-frame image and the sub-frame image is determined so that the frequency In calculated by B=(2/3)×
(1−
(Io/2In)2) is equal to or more than 65 Hz and equal to or less than 80 Hz.
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Specification