Liquid-crystal display device having a shield shielding an electromagnetic wave radiated from one of a driver and an electrode lead-out line

• US 20020101553A1
• Filed: 08/11/2001
• Published: 08/01/2002
• Est. Priority Date: 01/31/2001
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Fujitsu Limited
• Inventors: Ohashi, Noriyuki, Enomoto, Hiromi, Zhang, Hong Yong
• Granted Patent: US 6,897,919 B2
• Time in Patent Office: Days
• US Class Current: 349/110
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels

Abstract

A liquid-crystal display device is provided. The liquid-crystal display device comprises a first substrate having a pixel electrode, a signal line, a scanning line, and a driver driving one of the signal line and the scanning line, a second substrate opposing the first substrate and having a common electrode, a liquid-crystal layer formed between the pixel electrode and the common electrode, and a first shield placed opposite the driver so as to shield an electromagnetic wave radiated from the driver.

Claims

1. A liquid-crystal display device comprising:

a first substrate having a pixel electrode, a signal line, a scanning line, and a driver driving one of said signal line and said scanning line;

a second substrate having a common electrode, the second substrate opposing said first substrate;

a liquid-crystal layer formed between said pixel electrode and said common electrode; and

a first shield placed opposite said driver so as to shield an electromagnetic wave radiated from said driver.

2. The liquid-crystal display device as claimed in claim 1, wherein said first shield is formed on said second substrate.

3. The liquid-crystal display device as claimed in claim 1, wherein said first shield is formed on a third substrate separate from said first substrate and said second substrate.

4. The liquid-crystal display device as claimed in claim 2, further comprising:

an electrode lead-out line formed on said first substrate so as to input and output a signal to and from said driver; and

a second shield formed on a third substrate placed opposite said electrode lead-out line so as to shield an electromagnetic wave radiated from said electrode lead-out line, the third substrate being separate from said first substrate and said second substrate.

9. The liquid-crystal display device as claimed in claim 1, further comprising a voltage supplier electrically connecting said first shield with said first substrate so as to supply a predetermined voltage to said first shield.

12. The liquid-crystal display device as claimed in claim 1, wherein said first shield is formed of a same material as said common electrode.

15. The liquid-crystal display device as claimed in claim 1, wherein said first shield is formed of one of aluminum and titanium.

5. A liquid-crystal display device comprising:

a first substrate having a pixel electrode, a signal line, a scanning line, a driver driving one of said signal line and said scanning line, and an electrode lead-out line used for inputting and outputting a signal to and from said driver;

a second substrate having a common electrode, the second substrate opposing said first substrate;

a liquid-crystal layer formed between said pixel electrode and said common electrode; and

a first shield placed opposite said electrode lead-out line so as to shield an electromagnetic wave radiated from said electrode lead-out line.

6. The liquid-crystal display device as claimed in claim 5, wherein said first shield is formed on a third substrate separate from said first substrate and said second substrate.

7. The liquid-crystal display device as claimed in claim 6, further comprising a second shield formed on a fourth substrate placed opposite said driver so as to shield an electromagnetic wave radiated from said driver.

10. The liquid-crystal display device as claimed in claim 5, further comprising a voltage supplier electrically connecting said first shield with said first substrate so as to supply a predetermined voltage to said first shield.

13. The liquid-crystal display device as claimed in claim 5, wherein said first shield is formed of a same material as said common electrode.

16. The liquid-crystal display device as claimed in claim 5, wherein said first shield is formed of one of aluminum and titanium.

8. A liquid-crystal display device comprising:

a first substrate having a pixel electrode, a signal line, a scanning line, a driver driving one of said signal line and said scanning line, and an electrode lead-out line used for inputting and outputting a signal to and from said driver;

a second substrate having a common electrode, the second substrate opposing said first substrate;

a liquid-crystal layer formed between said pixel electrode and said common electrode; and

a shield formed unitarily on a third substrate placed opposite said driver and said electrode lead-out line so as to shield electromagnetic waves radiated from said driver and said electrode lead-out line, the third substrate being separate from said first substrate and said second substrate.

11. The liquid-crystal display device as claimed in claim 8, further comprising a voltage supplier electrically connecting said shield with said first substrate so as to supply a predetermined voltage to said shield.

14. The liquid-crystal display device as claimed in claim 8, wherein said shield is formed of a same material as said common electrode.

17. The liquid-crystal display device as claimed in claim 8, wherein said shield is formed of one of aluminum and titanium.