Wide flat panel LCD with unitary visual display
View Patent ↗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.
1. 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.
2. The flat panel LCD of claim 1 , wherein said first and second display areas are defined by said plurality of lines and the first and second display areas are separated by a junction line passing across the plate, the visual output of each of the first and second display areas is driven by a gate driver signal and a source driver signal received along the respective display perimeter.
3. The flat panel LCD of claim 2 , wherein said active display area is divided equally between the first and second display area.
4. The flat panel LCD of claim 2 , wherein at least one of the first and second display areas is further subdivided into first and second subdisplay areas, a visual output of said first and second subdisplay areas being separately driven.
5. The flat panel LCD of claim 2 , wherein a measurement of a video output parameter at a point of the first display area along any line perpendicular to the junction line and at a distance therefrom differs by less than a predetermined amount from a measurement of the video output parameter at a corresponding point of the second display area along the same perpendicular line, when the distance is less than 5% of a total distance from the one of the first set of parallel sides to the junction line.
6. The flat panel LCD of claim 4 , wherein the video output parameter is selected from the group consisting of peak brightness, contrast, and white point color temperature.
7. The flat panel LCD of claim 4 , wherein said first and second subdisplay areas are defined by said plurality of lines, the junction line passing across the plate, and a subjunction line passing across the plate separating the first and second subdisplay areas, the visual output of each of the first and second subdisplay areas is driven by a gate signal driver and a source signal driver received along the respective display perimeter.
8. The flat panel LCD of claim 4 , wherein each said display area is divided equally between the first and second subdisplay areas.
9. The flat panel LCD of claim 4 , wherein the gamma curve generated from the visual output of each said subdisplay area is adjusted to be close to a common gamma curve across a range of gray scale values to provide the unitary visual display.
10. The flat panel LCD of claim 4 , wherein a measurement of a video output parameter at a point of the first subdisplay area along any line perpendicular to the junction line and at a distance therefrom differs by less than a predetermined amount from a measurement of the video output parameter at a corresponding point of the second subdisplay area along the same perpendicular line, when the distance is less than 5% of a total distance from the one of the first set of parallel sides to the junction line.
11. The flat panel LCD of claim 10 , wherein the video output parameter is selected from the group consisting of peak brightness, contrast, and white point color temperature.
12. The flat panel LCD of claim 1 , wherein said first and second display areas comprising subpixels, said subpixels having subpixel voltages, said subpixel voltages adjusted to a desired optical transmission.
13. The flat panel LCD of claim 1 , wherein said active display areas has an aspect ratio of at least 2.2.
14. The flat panel LCD of claim 1 , wherein the junction line is a centerline of the front plate.
15. The flat panel LCD of claim 1 , wherein said display area is adapted for use as an aircraft instrument panel.
16. 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.
17. The flat panel LCD of claim 16 , wherein the video output parameters of each said pair of points relative to junction line is tuned so as to be within a predetermined allowable variance.
18. The flat panel of claim 17 , wherein the predetermined allowable variance is set less than a visually perceptible difference for the at least one video output parameter, so as to form the unitary visual display.
19. 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.
20. The method of claim 16 , wherein the predetermined allowable variance is set less than a visually perceptible difference for the at least one video output parameter.