DISPLAY DEVICE HAVING A TOUCH SCREEN PANEL

• US 20080151171A1
• Filed: 11/07/2007
• Published: 06/26/2008
• Est. Priority Date: 12/21/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: KIM, Seong-ho, Jeong, Dong-jin
• Granted Patent: US 8,223,278 B2
• Time in Patent Office: Days
• US Class Current: 349/150
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H05K 1/147 at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit H05K1/148 takes precedence

Abstract

A display device includes a first substrate, a second substrate, pads, a first flexible circuit board, and a second flexible circuit board. The first substrate includes a first insulating substrate, a first resistance layer formed on the first insulating substrate, and first and second signal lines formed on the first insulating substrate. The second substrate faces the first substrate and includes a second insulating substrate, a second resistance layer formed on the second insulating substrate, and third and fourth signal lines formed on the second insulating substrate. The pads comprise a first pad connected to the first signal line, a second pad connected to the second signal line, a third pad connected to the third signal line, and a fourth pad connected to the fourth signal line. The first flexible circuit board is connected to two of the pads and the second flexible circuit board is connected to the other two pads.

Claims

1. A display device comprising:

a first substrate which comprises a first insulating substrate, a first resistance layer formed on the first insulating substrate, and first and second signal lines formed on the first insulating substrate;

a second substrate which faces the first substrate and comprises a second insulating substrate, a second resistance layer formed on the second insulating substrate, and third and fourth signal lines formed on the second insulating substrate;

pads which comprise a first pad connected to the first signal line, a second pad connected to the second signal line, a third pad connected to the third signal line, and a fourth pad connected to the fourth signal line;

a first flexible circuit board connected to two of the pads; and

a second flexible circuit board connected to the other two of the pads.

2. The display device according to claim 1, wherein the first flexible circuit board and the second flexible circuit board are connected to different corners of the first substrate, respectively.

3. The display device according to claim 1, wherein the pads are formed on the first substrate, and

the display device further comprises a conducting member which is formed between the first and second substrates and electrically connects the third pad with the third signal line and the fourth pad with the fourth signal line, respectively.

4. The display device according to claim 3, wherein the first flexible circuit board is connected to one of the first and second pads and to one of the third and fourth pads.

5. The display device according to claim 1, wherein the first and second pads are formed on the first substrate;

the third and fourth pads are formed on the second substrate; and

the first and second flexible circuit boards are provided as a double sided circuit board.

6. The display device according to claim 5, wherein the first flexible circuit board is connected to one of the first and second pads and to one of the third and fourth pads.

7. The display device according to claim 1, further comprising a liquid crystal panel placed in back of the first substrate.

8. The display device according to claim 7, wherein the first insulating substrate comprises glass, and

the second insulating substrate comprises a polymer film.

9. The display device according to claim 7, wherein the liquid crystal panel comprises

a first liquid crystal panel substrate formed with a thin film transistor;

a second liquid crystal panel substrate facing the first substrate and formed with a black matrix; and

a liquid crystal layer positioned between the first and second liquid crystal panel substrates, and

wherein the pads are positioned within an area of the black matrix.

10. The display device according to claim 1, further comprising:

a liquid crystal panel substrate facing a rear surface of the first insulating substrate, and formed with a thin film transistor; and

a liquid crystal layer positioned between the first insulating substrate and the liquid crystal panel substrate.

11. The display device according to claim 10, further comprising a black matrix formed on the rear surface of the first insulating substrate,

wherein the pads are positioned within an area of the black matrix.

12. The display device according to claim 10, further comprising:

a first polarizing plate positioned on a rear surface of the liquid crystal panel substrate; and

a second polarizing plate positioned on an upper surface of the liquid crystal panel substrate.

13. The display device according to claim 10, wherein the second insulating substrate comprises a polymer film.

14. A display device comprising:

a first substrate which comprises a first insulating substrate, a first resistance layer formed on the first insulating substrate, and a plurality of X signal lines formed on the first insulating substrate;

a second substrate which faces the first substrate and comprises a second insulating substrate, a second resistance layer formed on the second insulating substrate, and a plurality of Y signal lines formed on the second insulating substrate;

pads which comprise a plurality of sub-pads electrically connected to one of the X signal lines and the Y signal lines, respectively; and

a flexible circuit board which comprises a flexible film, and a first input lead formed on a first surface of the flexible film and corresponding to a first set of the sub-pads.

15. The display device according to claim 14, wherein the flexible circuit board comprises a first flexible circuit board and a second flexible circuit board which are connected to different corners of the first substrate, respectively.

16. The display device according to claim 14, wherein the flexible circuit board comprises a second input lead formed on a second surface of the flexible film and corresponding to a second set of the sub-pads.

17. The display device according to claim 14, wherein the first insulating substrate comprises glass,

the second insulating substrate comprises a polymer film, and

the pads are formed on the first insulating substrate.

18. The display device according to claim 14, wherein the sub-pads electrically connected to the X signal line are formed on the first substrate, and

the sub-pads electrically connected to the Y signal line are formed on the second substrate.

19. The display device according to claim 14, further comprising

a liquid crystal panel substrate facing a rear surface of the first insulating substrate and formed with a thin film transistor;

and

a liquid crystal layer positioned between the first insulating substrate and the liquid crystal panel substrate.

20. The display device according to claim 19, further comprising a black matrix formed on the rear surface of the first insulating substrate,

wherein the pads are positioned within an area of the black matrix.

21. The display device according to claim 19, further comprising:

a first polarizing plate positioned on a rear surface of the liquid crystal panel substrate; and

a second polarizing plate positioned on an upper surface of the second insulating substrate.