Printed circuit board and liquid crystal display device having the same

• US 7,489,520 B2
• Filed: 12/29/2004
• Issued: 02/10/2009
• Est. Priority Date: 04/29/2004
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Ha, Young Soo
• Primary Examiner(s): Dinh; Tuan T
• Application Number:
  US11/023,366
• Publication Number:
  US 20050243530A1
• Time in Patent Office: 1,504 Days
• Field of Search: 361792-794, 349149-152
• US Class Current: 361/777
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 1/0259 Electrostatic discharge [ESD] protection
• CPC Class Codes: H05K 2201/09781 Dummy conductors, i.e. not used for normal transport of current; Dummy electrodes of components
• CPC Class Codes: H05K 2201/0989 Coating free areas, e.g. areas other than pads or lands free of solder resist
• CPC Class Codes: H05K 2201/10196 Variable component, e.g. variable resistor
• CPC Class Codes: H05K 3/28 Applying non-metallic protective coatings H05K3/0091 takes precedence; methods for intermediate insulating layers for build-up multilayer circuits H05K3/4673

Abstract

An LCD capable of preventing and electrostatic discharge is provided. The LCD includes a liquid crystal panel for displaying an image, a PCB on which electronic devices are mounted to generate signals for driving the liquid crystal panel, and a protective pattern formed around an electronic device of the electronic devices, which is vulnerable to an electrostatic discharge.

Claims

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

a liquid crystal panel for displaying an image;

a printed circuit board (PCB) including a ground pattern and a solder resistor formed thereon and having electronic devices mounted thereon to generate signals for driving the liquid crystal panel; and

protective patterns formed around an electronic device which is vulnerable to an electrostatic discharge separating the vulnerable electronic device from other electronic devices, wherein the protective patterns have a plurality of patterns formed by the ground pattern exposed to the exterior by partially removing the solder resistor around the vulnerable electronic device.

2. The LCD according to claim 1, wherein the electronic device vulnerable to the electrostatic discharge is a variable resistor.

3. The LCD according to claim 1, further comprising a plurality of signal patterns formed on the PCB.

4. The LCD according to claim 1, wherein other electronic devices are adjacent to the electronic device vulnerable to the electrostatic discharge having the protective patterns interposed therebetween.

5. The LCD according to claim 3, wherein the protective patterns guides the electrostatic discharge to the ground pattern.

6. A printed circuit board (PCB) comprising:

a substrate including a ground pattern and a solder resistor formed thereon;

an electronic device mounted on the substrate and vulnerable to an electrostatic discharge;

other electronic devices mounted on the substrate; and

protective patterns formed around the electronic device which is vulnerable to an electrostatic discharge separating the vulnerable electronic device from the other electronic devices,

wherein the protective patterns have a plurality of patterns formed by the ground pattern exposed to the exterior by partially removing the solder resistor around the vulnerable electronic device.

7. The PCB according to claim 6, wherein the electronic device vulnerable to the electrostatic discharge is a variable resistor.

8. The PCB according to claim 6, further comprising a plurality of signal patterns formed on the PCB.

9. The PCB according to claim 6, wherein other electronic devices are formed adjacent to the electronic device vulnerable to the electrostatic discharge, with the protective patterns interposed therebetween.

10. The PCB according to claim 8, wherein the protective patterns guides the electrostatic discharge to the ground pattern.