ADVANCED LCD PACKAGING FOR MILITARY AND SEVERE ENVIRONMENTS

• US 20090015998A1
• Filed: 07/12/2007
• Published: 01/15/2009
• Est. Priority Date: 07/12/2007
• Status: Active Grant

• Current Assignee: Northrop Grumman Guidance And Electronics Company, Inc.
• Original Assignee: Litton Systems Incorporated
• Inventors: McLean, Thomas, Saxena, Ragini, Loo, Thomas, Havelka, Steven E., Bong, Ban S.
• Granted Patent: US 7,868,983 B2
• Time in Patent Office: Days
• US Class Current: 361/679.210
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G09F 9/35 being liquid crystals G09F9/302 takes precedence; liquid crystal materials C09K19/00; liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13

Abstract

The invention relates generally to a modular display panel for enclosing Commercial-Off-The-Shelf (“COTS”) display technologies. More particularly, the invention relates to a modular display panel for housing COTS light emitting or transmitting display subassemblies such as Liquid Crystal Displays (LCD) for military and other severe environments. The modular display assembly can comprise a base plate, a first frame, a window, a second, a circuit located, and a plurality of light emitting diodes mounted on the circuit board. The COTS light emitting or transmitting display subassembly can be connected to the second frame.

Claims

1. A modular display panel for enclosing a light emitting or transmitting display subassembly comprising:

a base plate;

a first frame having a first opening, the first frame being attached to the base plate so as to form a cavity;

a window attached to the first frame at the first opening thereby enclosing the cavity;

a second frame having a second opening, the second frame located in the cavity formed by the base plate and the first frame;

a circuit board, located adjacent to the base plate in the cavity; and

a plurality of light emitting diodes mounted on the circuit board.

2. The modular display panel of claim 1 wherein the display assembly is attached to the second frame at the second opening.

3. The modular display panel of claim 2 wherein the first frame comprises metal coated plastic.

4. The modular display panel of claim 2 wherein the first frame comprises metal coated glass filled plastic.

5. The modular display panel of claim 2 wherein the window is comprised of a glass layer.

6. The modular display panel of claim 5 wherein the window further comprises a conductive indium tin oxide layer.

7. The modular display panel of claim 2 further comprising a drive electronic, the drive electronic contained within the cavity and electrically connected to the display subassembly.

8. The modular display panel of claim 2 further comprising a film, the film located in the cavity between the window and the plurality of light emitting diodes.

9. The modular display panel of claim 2 further comprising a diffuser, the diffuser located in the cavity between the window and the plurality of light emitting diodes.

10. The modular display panel of claim 4 wherein the base plate, the first frame, and the window are all electrically conductive and form a Faraday cage around the display subassembly.

11. The modular display panel of claim 2 wherein the base plate comprises an electrically and thermally conductive material.

12. The modular display panel of claim 11 wherein the first frame comprises an impact resistant electrically and thermally conductive material.

13. A modular display panel for enclosing a light emitting or transmitting display subassembly comprising:

a base plate of electrically and thermally conductive material;

a first frame having a first opening attached to the base plate to form a cavity;

the first frame made of an impact resistant electrically and thermally conductive material. a window having a glass layer, attached to the first frame at the first opening for enclosing the cavity;

a second frame with a second opening, the second frame located in the cavity of the first frame, the display subassembly being attached to the second frame at the second opening;

a circuit board, located adjacent to the base plate within the cavity; and

a plurality of light emitting diodes mounted on the circuit board on the side facing the display subassembly.

14. The modular display panel of claim 13 wherein the first frame is a metal coated glass filled plastic.

15. The modular display panel of claim 14 wherein the window further comprises a conductive indium tin oxide layer.

16. The modular display panel of claim 15 further comprising a drive electronic, the drive electronic contained within the cavity and electrically connected to the display subassembly.

17. The modular display panel of claim 16 further comprising a film, the film located in the cavity between the window and the plurality of light emitting diodes.

18. The modular display panel of claim 17 further comprising a diffuser, the diffuser located in the cavity between the window and the plurality of light emitting diodes.

19. The modular display panel of claim 18 wherein the base plate, the first frame, and the window form a Faraday cage around the display subassembly.

20. A modular display panel for enclosing a light emitting or transmitting display subassembly comprising:

a base plate of electrically and thermally conductive material;

a first frame having a first opening attached to the base plate to form a cavity;

the first frame being made of an impact resistant electrically and thermally conductive metal coated glass filled plastic. a window having a glass layer and a conductive indium tin oxide layer, the window being attached to the first frame at the first opening for enclosing the cavity, the first base plate, the first frame, and the window forming a Faraday cage;

an indium tin oxide heater and electromagnetic inference shield attached to the window;

a second frame with a second opening, located in the cavity, the display subassembly being attached to the second frame at the second opening;

a circuit board, located within the cavity adjacent the base plate;

a plurality of light emitting diodes mounted on the circuit board, on the side facing the display subassembly;

drive electronics contained within the cavity and electrically connected to the display subassembly;

a film, located in the cavity between the display subassembly and the plurality of light emitting diodes; and

a diffuser, located in the cavity between the display subassembly and the plurality of light emitting diodes.