Connecting structure of printed circuit board of liquid crystal display module

• US 20080045077A1
• Filed: 08/17/2007
• Published: 02/21/2008
• Est. Priority Date: 08/18/2006
• Status: Active Grant

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Chou, Yung-Wei
• Granted Patent: US 7,410,362 B2
• Time in Patent Office: Days
• US Class Current: 439/495
• CPC Class Codes: H01R 12/00 Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures printed connections to, or between, printed circuits H05K1/11
• CPC Class Codes: H01R 12/7076 for connection between PCB and component, e.g. display
• CPC Class Codes: H01R 4/027 comprising means for positioning or holding the parts to be soldered or welded
• 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
• CPC Class Codes: H05K 2201/048 Second PCB mounted on first PCB by inserting in window or holes of the first PCB
• CPC Class Codes: H05K 2201/058 Direct connection between two or more FPCs or between flexible parts of rigid PCBs
• CPC Class Codes: H05K 2201/09081 Tongue or tail integrated in planar structure, e.g. obtained by cutting from the planar structure
• CPC Class Codes: H05K 3/363 by soldering

Abstract

A connecting structure of a printed circuit board of a liquid crystal display (LCD) module includes a double side printed circuit board and a single side printed circuit board. With the design of the double side printed circuit board having a solder element with two solder surfaces with a plurality of plated through holes (PTHs), and the design of the opening neighboring the solder element, the conducting surface of the single side printed circuit board may easily accord with the structural requirements to select the corresponding solder surface for performing welding.

Claims

1. A connecting structure applied in a liquid crystal display module, comprising:

a double side printed circuit board having a solder element with two opposite solder surfaces and an opening partially surrounding the solder element;

a plurality of first pads disposed on the solder surfaces with at least a plated through holes formed on the first pads;

a single side printed circuit board having an extending portion with a conducting surface near the end of the extending portion; and

a plurality of second pads disposed on the conducting surface;

wherein the second pads are connected to the first pads on one of the two solder surfaces by welding.

2. The connecting structure as claimed in claim 1, wherein the conducting surface passes through the opening from one side of the double side printed circuit board and contacts the corresponding solder surface on the other side of the double side printed circuit board, such that the second pads are connected to the first pads on the corresponding solder surface by welding.

3. The connecting structure as claimed in claim 2, wherein the solder element is rotated in a predetermined angle with respect to the double side printed circuit board.

4. The connecting structure as claimed in claim 1, wherein the double side printed circuit board and the single side printed circuit board are flexible printed circuit boards.

5. The connecting structure as claimed in claim 4, wherein the double side printed circuit board and the single side printed circuit board are flexible copper clad laminates.

6. The connecting structure as claimed in claim 4, wherein the liquid crystal display module comprises a display panel, and the double side printed circuit board electrically connects to the display panel.

7. The connecting structure as claimed in claim 4, wherein the liquid crystal display module comprises a backlight module having a light source, and the single side printed circuit board electrically connects to the light source.

8. The connecting structure as claimed in claim 1, wherein the opening is a U-shaped or tetragon-shaped opening.

9. The connecting structure as claimed in claim 1, wherein the first and the second pads are formed by metal material.

10. The connecting structure as claimed in claim 9, wherein the metal material is copper, tin, nickel, gold or aluminum.

11. The connecting structure as claimed in claim 1, wherein the single side printed circuit board has an upper surface and a lower surface, and the conducting surface is disposed on the upper surface or on the lower surface.