Granted Patent B2

US 7,714,834 · App. 12/539,424 · Granted May 11, 2010

Abstract

Claims (29)

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 perimeter;

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; and

said first and second display areas comprising subpixels, said subpixels having subpixel voltages, said subpixel voltages adjusted to a desired optical transmission, wherein the gamma curves of each display area are 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 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 areas.

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 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.

6. The flat panel LCD of claim 4 , wherein each said display area is divided equally between the first and second subdisplay areas.

7. The flat panel LCD of claim 4 , wherein a 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.

8. The flat panel LCD of claim 4 , 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 a perpendicular line, when the distance is less than 5% of a total distance from one of the plurality of sides to the junction line; and

a measurement of the video output parameter at a point of the first subdisplay area along any line perpendicular to the subjunction 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 one of said plurality of sides to the subjunction line.

9. The flat panel LCD of claim 8 , wherein the video output parameter is selected from the group consisting of peak brightness, contrast, and white point color temperature.

10. 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 one of said plurality of 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 active display area has an aspect ratio of at least 2.2.

13. The flat panel LCD of claim 1 , wherein the junction line is a centerline of the front plate.

14. The flat panel LCD of claim 1 , wherein said active display area is adapted for use as an aircraft instrument panel.

15. A method of manufacturing a flat panel liquid crystal display (“LCD”) having a unitary display comprising a first and second display area adjoined along a junction line, a visual output of said first and second display areas being driven by respective first and second driving circuits, said first and second display areas comprising subpixels, said subpixels having subpixel voltages, comprising the steps of:

providing a flat panel LCD having a front panel plate for providing the unitary display;

adjusting said subpixel voltages at each particular gamma level while measuring said first and second display area's optical transmission level until a desired optical transmission level is achieved;

activating the respective first and second display areas and measuring the values of at least one video output parameter at a first and a second point on each of said first and second display areas, said first points and said second points of the respective display area defining correspondingly positioned pairs of points relative to said junction line; and

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.

16. The method of claim 15 , wherein the first pair of corresponding points are positioned within 5% of the width of the respective display area from the junction line.

17. The method of claim 15 , wherein the second pair of corresponding points are positioned within 50% of the width of the respective display are from the junction line.

Assignments (10)