Portable display device

• US 7,626,672 B2
• Filed: 09/12/2006
• Issued: 12/01/2009
• Est. Priority Date: 11/23/2005
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Song, Hyo Shin
• Primary Examiner(s): Font; Frank G
• Assistant Examiner(s): Radkowski; Peter
• Application Number:
  US11/520,205
• Publication Number:
  US 20070115419A1
• Time in Patent Office: 1,176 Days
• Field of Search: 349/56, 349/58, 349/84, 349/139, 349/149, 349/152
• US Class Current: 349/150
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 1/0215 Grounding of printed circuits by connection to external grounding means
• CPC Class Codes: H05K 1/0259 Electrostatic discharge [ESD] protection
• CPC Class Codes: H05K 2201/053 Tails
• CPC Class Codes: H05K 2201/055 Folded back on itself

Abstract

A portable display panel includes a liquid crystal display panel for displaying images, a backlight assembly including a light source for supplying light to the liquid crystal display panel, a bottom chassis for receiving the backlight assembly, a first printed circuit board for controlling the liquid crystal display panel and the light source, a second printed circuit board connected to the first printed circuit board and an external drive circuit, and a protrusion extending from the first printed circuit board. The protrusion has copper film exposed on its end. The copper film of the protrusion is electrically connected to the bottom chassis.

Claims

1. A portable display panel comprising:

a liquid crystal display panel for displaying images;

a backlight assembly including a light source for supplying light to the liquid crystal display panel;

a bottom chassis for receiving the backlight assembly;

a first printed circuit board for controlling the liquid crystal display panel and the light source, the first printed circuit board including a ground copper film; and

a second printed circuit board connected to the first printed circuit board and an external drive circuit,

wherein the first printed circuit board has an integral protrusion extending from a first side at a periphery of the first printed circuit board, the ground copper film exposed at an end of the protrusion, wherein the exposed ground copper film at the end of the protrusion is electrically connected to the bottom chassis.

2. The portable display panel as claimed in claim 1, wherein the ground copper film is connected to a ground of the second printed circuit board.

3. The portable display panel as claimed in claim 1, wherein the protrusion is a first protrusion, the first printed circuit board further including a second protrusion extending from a second side at the periphery of the first printed circuit board, the second side opposite the first side, the ground copper film exposed at an end of the second protrusion, wherein the exposed ground copper film at the end of the second protrusion is electrically connected to the bottom chassis and to a ground of the second printed circuit board.

4. The portable display panel as claimed in claim 1, wherein the protrusion is folded.

5. The portable display panel as claimed in claim 4, wherein the protrusion is folded at a predetermined angle.

6. The portable display panel as claimed in claim 1, further comprising a light emitting panel connected to the second printed circuit board.

7. The portable display panel as claimed in claim 6, wherein the light emitting panel is connected to the second printed circuit board on a side distal to the first printed circuit board.

8. The portable display panel as claimed in claim 1, wherein the liquid crystal display panel comprises:

a first substrate;

a second substrate facing the first substrate, the second substrate having a plurality of thin film transistors located thereon; and

a liquid crystal layer injected between the first substrate and the second substrate.

9. The portable display panel as claimed in claim 1, wherein the light source comprises at least one light emitting diode.

10. The portable display panel as claimed in claim 1, further comprising a backlight assembly frame supporting the liquid crystal display panel and the backlight assembly, the backlight assembly frame having a first side fixed to the bottom chassis, and a second side opposite the first side.

11. The portable display panel as claimed in claim 10, further comprising a top chassis fixed to the second side of the backlight assembly frame.

12. The portable display panel as claimed in claim 1, wherein the protrusion has a protective film covering the ground copper film except at the end where the ground copper film is exposed.

17. The portable display panel as claimed in claim 4, wherein the first printed circuit board has a surface facing the bottom chassis, the first side at the periphery of the printed circuit board is an edge of the surface facing the bottom chassis, and the exposed ground copper film at the end of the protrusion is substantially parallel to the surface facing the bottom chassis.

18. The portable display panel as claimed in claim 1, wherein the ground copper film of the first printed circuit board is connected directly to the bottom chassis without being connected through another material.

13. A portable display panel comprising:

a liquid crystal display panel for displaying images;

a backlight assembly comprising a light source for supplying light to the liquid crystal display panel;

a bottom chassis for receiving the backlight assembly;

a first printed circuit board for controlling the liquid crystal display panel and the light source, the first printed circuit board including a ground copper film therein; and

a second printed circuit board electrically coupled to the first printed circuit board and an external drive circuit,

wherein the first printed circuit board has an integral bendable protrusion, the ground copper film exposed at an end of the protrusion, and a protective film covering the ground copper film except at the end of the protrusion where the ground copper film is exposed, and

wherein the protrusion is folded at an angle of approximately 180 degrees, the end of the protrusion being between a surface of the bottom chassis and a surface of the first printed circuit board facing the surface of the bottom chassis, and the exposed ground copper film at the end of the protrusion being electrically coupled to the bottom chassis.

14. The portable display panel as claimed in claim 13, wherein the protrusion produces a restoring force.

15. The portable display panel as claimed in claim 13, wherein the protrusion is a first protrusion, the portable display panel further comprising a second bendable protrusion having the ground copper film exposed at an end thereof, and wherein the first protrusion extends from a first side at a periphery of the first printed circuit board and the second protrusion extends from a second side at the periphery of the first printed circuit board, the second side opposite the first side.

16. The portable display panel as claimed in claim 15, wherein the ground copper film is electrically coupled to a ground of the second printed circuit board.

19. The portable display panel as claimed in claim 13, wherein the exposed ground copper film at the end of the protrusion is substantially parallel to the surface of the first printed circuit board facing the surface of the bottom chassis.

20. The portable display panel as claimed in claim 13, wherein the ground copper film of the first printed circuit board is connected directly to the bottom chassis without being connected through another material.