Flat panel display having integral heater, EMI shield, and thermal sensors

• US 20050073640A1
• Filed: 02/02/2004
• Published: 04/07/2005
• Est. Priority Date: 10/07/2003
• Status: Active Grant

• Current Assignee: Mercury Mission Systems LLC (Mercury Systems, Incorporated)
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.), American Panel Corporation (Mercury Systems, Incorporated)
• Inventors: Kwon, Keuk-Sang, Kang, In-Byeong, Park, Hyoung-Yol, Dunn, William R.
• Granted Patent: US 7,265,809 B2
• Time in Patent Office: Days
• US Class Current: 349/161
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2202/22 Antistatic materials or arrangements

Abstract

A flat panel display having a black mask EMI layer isolated from Vcom and tied to zero potential. The flat panel display has an integral metal heater layer and thermal sensor that are in close proximity to the liquid crystals to provide efficient heating and temperature sensing.

Claims

1. A flat panel display comprising:

a front glass plate;

a rear glass plate;

a layer of liquid crystals interposed between said front and rear glass plates;

a TFT array layer interposed between said front and rear glass plates; and

a metal heater layer integral to said TFT array layer.

2. A flat panel display according to claim 1, wherein said metal heater layer is patterned onto said TFT array layer.

3. A flat panel display according to claim 1, wherein said metal heater layer is comprised of a grid of intersecting horizontal and vertical lines.

4. A flat panel display according to claim 1, wherein said metal heater layer is interposed between said front and rear glass plates to allow faster heating of said layer of liquid crystals.

5. A flat panel display according to claim 1, further comprising:

an EMI layer interposed between said front and rear glass plates,

wherein said EMI layer is a low electrical resistance layer for absorbing and conducting interference signals from said display.

6. A flat panel display according to claim 5, wherein said metal heater layer is optically hidden behind said EMI layer.

7. A flat panel display according to claim 5, wherein said EMI layer is a black mask layer;

and

wherein said EMI layer is tied to zero potential and electrically isolated from Vcom.

8. A flat panel display according to claim 1, further comprising:

pixel capacitors, wherein said metal heater layer is overcoated with a passivation layer to electrically isolate said metal heater layer from said pixel capacitors.

9. A flat panel display according to claim 1, wherein said metal heater layer does not reduce light transmission through said display.

10. A flat panel display according to claim 1, wherein said metal heater layer is applied in a grid pattern.

11. A flat panel display according to claim 10, wherein said grid pattern is applied to minimize capacitive coupling in said display.

12. A flat panel display according to claim 1, wherein said metal heater layer is overcoated with an insulating dielectric.

13. A flat panel display according to claim 1, further comprising:

source and gate lines,

wherein said metal heater layer is further comprised of conductor lines applied in a grid pattern; and

wherein said conductor lines lie under said source and gate lines.

14. A flat panel display according to claim 1, wherein said metal heater layer is applied in a grid pattern;

and

wherein said grid pattern is applied to provide a greater heat output around a periphery of said display.

15. A flat panel display comprising:

a front plate;

a rear plate;

a layer of liquid crystals interposed between said front and rear plates;

a TFT array layer interposed between said front and rear plates; and

a metal heater layer integral to said TFT array layer,

wherein said metal heater layer is comprised of a grid of intersecting horizontal and vertical lines.

16. A flat panel display comprising:

a front plate;

a rear plate;

a layer of liquid crystals interposed between said front and rear plates; and

a metal heater layer interposed between said front and glass to provide heat to said layer of liquid crystals.

17. A flat panel display according to claim 16, further comprising:

a TFT array layer interposed between said front and rear plates,

wherein said metal heater layer is integral to said TFT array layer.

18. A flat panel display according to claim 16, wherein said metal heater layer is applied to provide a greater heat output around a periphery of said display.