Wide flat panel LCD with unitary visual display
AssigneeAmerican Panel Corporation
InventorWilliam Dunn
Life of this patent
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Abstract
A flat panel display, particularly a liquid crystal display has a front plate with a plate area defined by a plate perimeter, which is in turn defined by a first and second pair of parallel sides, the pairs of sides in perpendicular relationship to each other. An active display area providing a unitary visual display is located within the plate perimeter. In the invention, this active display area is divided into at least first and second display areas, a visual output of said first and second display areas being separately driven. In some embodiments, one or both of the display areas is subdivided into first and second subdisplay areas, with the visual output of the first and second subdisplay areas being separately driven.
Claims20
A flat panel liquid crystal display (“LCD”), comprising:
- a front plate with a plate area defined by a plate perimeter defined by a plurality of sides, and an active display area providing a unitary visual display within said plate perimeter;
- and
- said active display area divided into at least first and second display areas, a visual output of said first and second display areas being separately driven;
- wherein a gamma curve for each display area is set to a common gamma curve across a range of gray scale values to provide the unitary visual display.
A flat panel liquid crystal display (“LCD”), comprising:
- a front plate with a plate area defined by a plate perimeter defined by a plurality of sides, and an active display area providing a unitary visual display within said plate perimeter;
- said active display area divided into at least first and second display areas divided by a junction line, a visual output of said first and second display areas being separately driven;
- and
- a first and second point on each of said first and second display areas, wherein the values of at least one output parameter is measured, said first and second points of the respective display areas defining correspondingly positioned pairs of points relative to said junction line wherein a gamma curve for each display area is set to a common gamma curve across a range of gray scale values to provide the unitary visual display.
A method for manufacturing a flat panel liquid crystal display (LCD) having a unitary visual display comprising first and second display areas that adjoin along a junction line, a visual output of said first and second display areas being driven by respective first and second driving circuits, comprising the steps of:
- providing a flat panel LCD having a front plate for providing the unitary visual display generating a gamma curve for each display area, the respective gamma curves are adjusted to be close to a common gamma curve across a range of gray scale values to provide the unitary visual display;
- activating the respective first and second display areas and measuring the value of at least one video output parameter at a first and a second point on each of the first and second display areas, said first points and said second points of the respective display areas defining correspondingly positioned pairs of points relative to said junction line;
- and
- tuning at least one of said first and said second driving circuits such that, after such tuning step, a difference between the measured values for each said at least one video output parameter of each said pair of points is smaller than a predetermined allowable variance.
Dependencies are inferred from the claim text.