US 12,078,884 B2
System and method for accurately maintaining LCD luminance, contrast, and response time at low temperatures
Kathleen M. Stinton, Andover, MA (US); and Charles Lemons, Andover, MA (US)
Assigned to Mercury Mission Systems, LLC, Andover, MA (US)
Filed by Mercury Mission Systems, LLC, Andover, MA (US)
Filed on Feb. 28, 2022, as Appl. No. 17/682,459.
Prior Publication US 2023/0273472 A1, Aug. 31, 2023
Int. Cl. G02F 7/00 (2006.01); G02F 1/1333 (2006.01)
CPC G02F 1/133382 (2013.01) [G02F 7/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for maintaining a liquid crystal display comprising:
a liquid crystal display assembly comprising
a processor;
a heating element in electronic communication with the processor;
a temperature measuring device in electronic communication with the processor, wherein the temperature measuring device is positioned proximate to edge glass located away from a center of the liquid crystal display; and
a power supply;
wherein the temperature measuring device is adapted to communicate to the processor a first temperature value, wherein the first temperature value is a measurement of edge glass temperature;
wherein the processor is configured to calculate a second temperature value based on the first temperature value and a steady state temperature delta, wherein the second temperature value is an estimate of temperature of liquid crystal material positioned at the center of the liquid crystal display; and
wherein the processor is configured to adjust the heating element to achieve a desired temperature threshold when the second temperature value does not meet the desired temperature threshold; and
wherein the heating element comprises a thermally conductive film or grid in thermal communication with liquid crystal material of the liquid crystal display assembly.