Liquid crystal display device

• US 6,822,721 B2
• Filed: 03/03/2003
• Issued: 11/23/2004
• Est. Priority Date: 03/27/2002
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Fujiwara, Norio
• Primary Examiner(s): Dudek, James A.
• Application Number:
  US10/378,350
• Publication Number:
  US 20030210374A1
• Time in Patent Office: 631 Days
• Field of Search: 349/161, 349/58
• US Class Current: 349/161
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans

Abstract

A liquid crystal display (LCD) device includes a case, an LCD unit accommodated in the case, and a heat insulating member provided between the LCD unit and the case. In the LCD device, even if a rear side or a display side is exposed to direct sunlight, heat is not transmitted to a liquid crystal material of the LCD unit, and the device is prevented from being darkened by heat.

Claims

1. A liquid crystal display (LCD) device comprising:

a case;

an LCD unit accommodated in said case; and

a heat insulating member between said LCD unit and said case, said heat insulating member including a film housing having a sealed and decompressed interior.

2. The LCD device of claim 1, wherein said heat insulating member has a heat conductivity smaller than the heat conductivity (0.026 W/mK) of still air.

10. The LCD device of claim 1, wherein said heat insulating member further includes a cloth container within said film housing, and a powder of silica contained within said cloth container.

3. A liquid crystal display (LCD) device comprising:

an LCD unit including a display side; and

a first heat insulating member being transparent provided over said display side, said first heat insulating member including;

a first transparent plate over said display side, and

a second transparent plate over said display side, said second transparent plate providing a space between said first transparent plate and said second transparent plate.

4. The LCD device of claim 3, wherein said first heat insulating member has a heat conductivity smaller than the heat conductivity (0.026 W/mK) of still air.

5. The LCD device of claim 3, further comprising:

a transparent member for absorbing radiation heat, disposed over said display side.

6. The LCD device of claim 5, wherein said transparent member is disposed between said display side and said first heat insulating member.

7. The LCD device of claim 3, wherein a pressure of said space is less than 500 torr.

8. The LCD device of claim 3, further comprising:

a case for accommodating said LCD unit; and

a second insulating member disposed between said LCD unit and said case.

9. The LCD device of claim 8, wherein said second heat insulating member has a heat conductivity smaller than the heat conductivity (0.026 W/mK) of still air.