Liquid crystal display assembly comprising an LED backlight assembly and a movable element placed behind the LED backlight assembly having a hinge to allow access to a rear portion of the LED backlight assembly

• US 8,537,302 B2
• Filed: 09/12/2008
• Issued: 09/17/2013
• Est. Priority Date: 06/11/2008
• Status: Active Grant

• Current Assignee: Manufacturing Resources International, Inc.
• Original Assignee: Manufacturing Resources International, Inc.
• Inventors: Dunn, William
• Primary Examiner(s): Lee, Paul
• Application Number:
  US12/209,841
• Publication Number:
  US 20090310065A1
• Time in Patent Office: 1,831 Days
• Field of Search: 349/50, 349/56, 349/57, 349/61, 349/62, 349/73, 349/74, 349/84, 362/97.3, 362/612, 362/630, 362/631, 362/249.02, 362632-634
• US Class Current: 349/61
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G09F 9/3026 Video wall, i.e. stackable semiconductor matrix display modules video wall control systems G06F3/1446, G09G2300/026
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 1/142 Arrangements of planar printed circuit boards in the same plane, e.g. auxiliary printed circuit insert mounted in a main printed circuit
• CPC Class Codes: H05K 13/00 Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

Exemplary embodiments include a backlight assembly for an electronic display wherein said backlight assembly is comprised of a plurality of tiles. Each tile has a plurality of lights attached to it, such that when a single light or group of lights fail, the tile may be replaced without having to replace the entire backlight assembly. The lights in the assembly may be any one of the following: light emitting diodes (LED), organic light emitting diodes (OLED), field emitting display (FED), light emitting polymer (LEP), and organic electro-luminescence (OEL). Embodiments also allow tiles to be removed from the rear of the display and dissipate heat from the lights to the rear of the backlight assembly.

Claims

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

an LED backlight assembly comprising

a mounting structure having front and rear portions,

a plurality of printed circuit boards (PCBs) having opposing front and rear surfaces and a perimeter edge portion, the PCBs being removably attached to said mounting structure, such that the PCBs can be removed from the rear portion of the mounting structure,

a securing element which fastens each PCB within the mounting structure, the securing element is accessible from the rear portion of the mounting structure,

a plurality of LEDs attached to each of the PCBs,

conduction lines on the PCBs which establish electrical communications with each LED,

an electrical connection on the front surface of each PCB which is in electrical communication with the conduction lines, and

a flexible electrical conductor removably attached to and in electrical communication with each of the electrical connections;

an image assembly placed in front of the LED backlight assembly;

a movable element placed behind the LED backlight assembly and having at least one edge;

a hinge at one edge of the movable element so that the movable element can rotate to allow access to the rear portion of the LED backlight assembly; and

electrical devices attached to the movable element such that rotation of the movable element causes the electrical devices to move accordingly, where the electrical devices are also in electrical communication with the image assembly.

2. The LCD of claim 1, further comprising:

a metallic surface covering at least half of the rear surface of each PCB.

3. The LCD of claim 1 further comprising:

a space within each PCB which allows the flexible electrical conductor to pass through the PCB and connect with the electrical connection on the front surface of the PCB.

4. The LCD of claim 1 wherein:

the electrical devices comprise a power supply.

5. The LCD of claim 1 wherein:

the electrical devices comprise a microprocessor.