Low stress mounting support for ruggedized displays

• US 7,978,281 B2
• Filed: 09/16/2008
• Issued: 07/12/2011
• Est. Priority Date: 09/16/2008
• Status: Expired due to Fees

• Current Assignee: General Dynamics Land Systems Incorporated (General Dynamics Corporation)
• Original Assignee: General Dynamics Land Systems Incorporated (General Dynamics Corporation)
• Inventors: Garrett, David A., Quigley, John P., Vergith, Nicholas D.
• Primary Examiner(s): Caley; Michael H
• Application Number:
  US12/211,586
• Publication Number:
  US 20100066936A1
• Time in Patent Office: 1,029 Days
• Field of Search: 349/58, 349/59, 349/60, 349/161, 361/679.21, 361/679.26
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: H05K 5/0204 Mounting supporting structures on the outside of casings

Abstract

Embodiments of the present invention may include an apparatus and method for ruggedizing a Liquid Crystal Display (LCD). Embodiments of the present invention may be configured to impart little or no stress to the LCD, while also shielding the LCD from adverse effects of electromagnetic interference (EMI). A conductive adhesive, a metal frame, and a assembly support panel may be used to provide a electrically conductive path for controlling the EMI. A protective glass may be used to shield the LCD from environmental effects and a heater glass allows for operation of the LCD in different thermal conditions.

Claims

1. A ruggedized display device, comprising:

a liquid crystal display (LCD);

a first glass element bonded to the LCD with a first adhesive;

a second glass element having a first surface bonded to the first glass element;

a metal frame bonded to the second glass element with a second adhesive on a second surface of the second glass element, the second adhesive being conductive, the metal frame defining a recess to receive the first glass element, the metal frame being bonded to the second glass element without contacting the LCD; and

an assembly support panel configured to support the metal frame, the assembly support panel being conductive and containing the LCD;

wherein the second adhesive, the metal frame, and the assembly support panel form an electrically conductive path.

2. The ruggedized display device of claim 1, wherein the electrically conductive path is configured to shield the LCD from electromagnetic interference (EMI).

3. The ruggedized display device of claim 2, wherein the electrically conductive path forms a Faraday cage.

4. The ruggedized display device of claim 3, wherein the Faraday cage provides sufficient shielding from EMI without using an EMI gasket.

5. The ruggedized display device of claim 1, wherein

the metal frame directly contacts the assembly support panel.

6. The ruggedized display device of claim 1, wherein the first glass element comprises at least one of:

a heater glass or a filler glass.

7. The ruggedized display device of claim 1, wherein the second glass element comprises at least one of:

a protective glass or a touch screen glass.

8. The ruggedized display device of claim 1, wherein the first adhesive comprises a transparent optical adhesive.

9. The ruggedized display device of claim 1, wherein the second adhesive comprises at least one of:

a metal particle filled thermal set adhesive or a metal filled pressure sensitive adhesive.

10. The ruggedized display device of claim 1, further comprising a seal in contact with the assembly support panel.

11. The ruggedized display device of claim 1, further comprising a conductive fastener configured to mount the metal frame to the assembly support panel.

12. A method for ruggedizing a display, comprising:

bonding a display to a first glass element with a first adhesive;

bonding a second glass element to the first glass element on a first surface of the second glass element;

bonding the second glass element to a metal frame with a second adhesive on a second surface of the second glass element, the second adhesive being conductive, the metal frame being bonded to the second glass element without contacting the display;

receiving the first glass element within a recess of the metal frame; and

mounting the metal frame to a conductive assembly support panel, thereby forming a electrically conductive path between the second adhesive, the metal frame, and the assembly support panel.

13. The method for ruggedizing the display of claim 12, wherein the electrically conductive path is formed to shield the display from electromagnetic interference (EMI).

14. The method for ruggedizing the display of claim 13, wherein the electrically conductive path forms a Faraday cage.

15. The method for ruggedizing the display of claim 14, wherein the Faraday cage provides sufficient shielding from EMI without using an EMI gasket.

16. The method for ruggedizing the display of claim 12, wherein

the metal frame directly contacts the assembly support panel.

17. The method for ruggedizing the display of claim 12, wherein the first glass element comprises at least one of:

a heater glass or a filler glass.

18. The method for ruggedizing the display of claim 12, wherein the second glass element comprises at least one of:

a protective glass or a touch screen glass.

19. The method for ruggedizing the display of claim 12, wherein the first adhesive is a transparent optical adhesive.

20. The method for ruggedizing the display of claim 12, wherein the second adhesive comprises at least one of:

a metal particle filled thermal set adhesive or a metal filled pressure sensitive adhesive.

21. The method for ruggedizing the display of claim 12, wherein mounting the metal frame to the assembly support panel comprises a conductive fastening means.

22. The method for ruggedizing the display of claim 12, further comprising providing a seal in contact with the assembly support panel.

23. The method for ruggedizing the display of claim 12, wherein the display comprises at least one of the following:

a liquid crystal display, a field emission display, a surface-conductor electron-emitter display, a plasma display, a vacuum fluorescent display, a light emitting diode display, and an interferometric modulator display.

24. A ruggedized display device, comprising:

a display;

a first glass element bonded to the display with a first adhesive;

a second glass element having a first surface bonded to the first glass element with a second adhesive, the second glass element configured to conduct an electrical charge; and

an assembly support panel configured to support the display and to conduct an electrical charge, the assembly support panel being coupled to the second glass element without contacting the display;

wherein the second glass element and the assembly support panel form an electrically conductive path.

25. The ruggedized display device of claim 24, further comprising a metal frame bonded to the second glass element with a third adhesive, the third adhesive comprising a conductive adhesive.