Printed circuit board and display device having the same

Patent metadata

Field	Value
Publication number	US-9699900-B2
Application number	US-201514680274-A
Country	US
Kind code	B2
Filing date	Apr 7, 2015
Priority date	Nov 19, 2014
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A circuit board, including a plurality of wiring lines extending along a first direction and arranged side by side along a second direction perpendicular to the first direction; a plurality of pads having a predetermined length along the first direction, the plurality of pads being on the wiring lines; ground pad outside the pads, the wiring lines including first wiring lines delivering a positive polarity signal and second wiring lines delivering a negative polarity signal, the pads including first pads on the first wiring lines and second pads on the second wiring lines, and a cross-sectional area of each wiring line being substantially equal to that of each pad.

First claim

What is claimed is:

1. A circuit board, comprising:
a plurality of wiring lines extending along a first direction and arranged side by side along a second direction perpendicular to the first direction;
a plurality of pads having a predetermined length along the first direction, the plurality of pads being on the wiring lines;
a ground pad outside the pads,
the wiring lines including a first wiring line delivering a positive polarity signal and a second wiring line delivering a negative polarity signal, the pads including a first pad on the first wiring line and a second pads on the second wiring line, wherein:
a width of the first wiring line is substantially equal to that of the first pad, and
a width of the second wiring line is substantially equal to that of the second pad.

2. The circuit board as claimed in claim 1 , wherein the second pad is separated from the first pad along the first direction.

3. The circuit board as claimed in claim 1 , wherein the first pad and the second pad do not overlap each other along the second direction.

4. The circuit board as claimed in claim 1 , further comprising a base having a first surface on which the wiring lines are disposed, wherein
the first wiring line and the second wiring line are arranged alternately, and wherein:
the first wiring line is between the first pad and the base, and
the second wiring line is between the second pad and the base.

5. The circuit board as claimed in claim 4 , wherein the first wiring line is separated from the second wiring line along the second direction such that the positive polarity signal and the negative polarity signal maintain an impedance balance.

6. The circuit board as claimed in claim 4 , wherein the first wiring line and second wiring line are a group, the circuit board further including a ground pattern between neighboring groups and penetrating the base.

7. The circuit board as claimed in claim 6 , further comprising a ground wiring line connected to the ground pattern, the ground wiring line being on a second surface of the base.

8. The circuit board as claimed in claim 7 , wherein the ground wiring line does not overlap the pads along the second direction.

9. The circuit board as claimed in claim 4 , wherein the first wiring line and second wiring line are a group, the circuit board further including a ground wiring between neighboring groups and extending on the first surface of the base along the first direction.

10. The circuit board as claimed in claim 4 , wherein the base includes a flexible material.

11. The circuit board as claimed in claim 1 , further comprising an overpower-blocking device including a first electrode connected to each of the pads, a second electrode connected to the ground pad, and a connecting member connecting the first electrode and the second electrode, the overpower-blocking device controlling an overvoltage and an overcurrent received through the wiring lines.

12. The circuit board as claimed in claim 11 , wherein when the overvoltage and the overcurrent are applied to the wiring lines, the connecting member discharges the overvoltage and the overcurrent by electrically connecting the first and second pads.

13. The circuit board as claimed in claim 1 , further comprising an electromagnetic interference (EMI) filter including a first electrode connected to each of the pads, a second electrode connected to the ground pad, and an elimination filter connecting the first electrode and the second electrode, the EMI filter removing EMI generated by the wiring lines.

14. The circuit board as claimed in claim 13 , wherein the EMI filter removes a noise component of the wiring lines and outputs the removed noise component to the ground pad.

15. A display device, comprising:
a display panel; and
a circuit board on which an integrated circuit for driving the display panel is formed,
the circuit board including:
a plurality of wiring lines extending along a first direction and arranged side by side along a second direction perpendicular to the first direction;
a plurality of pads having a predetermined length along the first direction, the plurality of pads being on the wiring lines;
a ground pad outside the pads,
the wiring lines including a first wiring line delivering a positive polarity signal and a second wiring line delivering a negative polarity signal, the pads including a first pad on the first wiring line and a second pad on the second wiring line, wherein:
a width of the first wiring line is substantially equal to that of the first pad, and
a width of the second wiring line is substantially equal to that of the second pad.

16. The display device as claimed in claim 15 , wherein the second pad is separated from the first pad by a predetermined distance along the first direction.

17. The display device as claimed in claim 15 , further comprising a base having a surface on which the wiring lines are disposed, wherein
the first wiring line and the second wiring line are arranged alternately, and wherein:
the first wiring line is between the first pad and the base, and
the second wiring line is between the second pad and the base.

18. The display device as claimed in claim 17 , wherein the first wiring line is separated from the second wiring line along the second direction such that the positive polarity signal and the negative polarity signal maintain an impedance balance.

19. The display device as claimed in claim 15 , further comprising an overpower-blocking device including a first electrode connected to each of the pads, a second electrode connected to the ground pad, and a connecting member connecting the first electrode and the second electrode, the overpower-blocking device controlling an overvoltage and an overcurrent received through the wiring lines.

20. The display device as claimed in claim 15 , further comprising an electromagnetic interference (EMI) filter including a first electrode connected to each of the pads, a second electrode connected to the ground pad, and an elimination filter connecting the first electrode and the second electrode, the EMI filter removing EMI generated by the wiring lines.

21. The circuit board as claimed in claim 1 , wherein:
a cross-sectional area of the first wiring line is substantially equal to that of the first pad, and
a cross-sectional area of the second wiring line is substantially equal to that of the second pad.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Moon Chul

Classifications

• H05K1/0215

  Grounding of printed circuits by connection to external grounding means · CPC title

• G02F1/136227

  Through-hole connection of the pixel electrode to the active element through an insulation layer · CPC title

• H05K1/0216

  Reduction of cross-talk, noise or electromagnetic interference (grounding H05K1/0215) · CPC title

• H05K1/025

  Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance (H05K1/024 and H05K1/0243 take precedence; for semiconductor devices H10W44/20) · CPC title

• H02H9/02

  responsive to excess current {(current limitation for voltage regulators G05F1/573; disconnection after limiting H02H3/025)} · CPC title