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US 6,151,000 AGranted
Display apparatus and display method thereof
AssigneeHitachi, Ltd.
InventorsHiroshi Ohtaka, Masaji Ishigaki, Yasuji Noguchi, Yuichiro Kimura, Ken Kumakura
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AssigneeHitachi, Ltd.
InventorsHiroshi Ohtaka, Masaji Ishigaki, Yasuji Noguchi, Yuichiro Kimura, Ken Kumakura
Estimating the term…
A display apparatus and display method are provided for a display panel having pixels arranged in a matrix form for displaying an image on a effective display area. Horizontal electrodes and vertical electrodes in the display panel are scanned for selectively illuminating said pixels by using a time sharing drive method in which one field period is divided into plural sub-fields weighted according to a sustaining period. As a result, an effective display area is divided into plural areas, no scanning for selecting a light emitting pixel is executed in a non-display area, and the number of sub-fields is increased in an area in which display in multiple gradations is required in a display area to obtain sufficient gradation. Instead of increasing the number of the sub-fields, the total sustaining period per one field is increased to obtain sufficient brightness. According to a feature of the invention, another area is provided in which the number of sub-fields is limited to the required minimum in which display in multiple gradations is not required. According to other feature of the invention, another area having few sub-fields is prepared instead of providing the non-display area.
A display apparatus comprising:
A display apparatus comprising:
A display apparatus comprising:
A display method for a display apparatus having a display panel for displaying an image on an effective display area that has pixels arranged in matrix form, means for scanning electrodes for selectively illuminating the pixels, means for forming a field with plural sub-fields, and means for forming a sub-field with a scanning period and an illuminating period, each illuminating period having luminous weight and gradations being decided by a combination of selected sub-fields, the display method comprising the steps of:
A display method for a display apparatus having a display panel for displaying an image on an effective display area that has pixels arranged in matrix form, means for scanning electrodes for selectively illuminating the pixels, means for forming a field with plural sub-fields, and means for forming a sub-field with a scanning period and an illuminating period, each illuminating period having luminous weight and gradations being decided by a combination of selected sub-fields, the display method comprising the steps of:
A display method for a display apparatus having a display panel for displaying an image on an effective display area that has pixels arranged in matrix form, means for scanning electrodes for selectively illuminating the pixels, means for forming a field with plural sub-fields, and means for forming a sub-field with a scanning period and an illuminating period, each illuminating period having luminous weight and gradations being decided by a combination of selected sub-fields, the display method comprising the steps of:
Dependencies are inferred from the claim text.