Display device with thermal link

• US 9,201,262 B2
• Filed: 04/20/2012
• Issued: 12/01/2015
• Est. Priority Date: 04/20/2012
• Status: Expired due to Fees

• Current Assignee: NeoGraf Solutions, LLC
• Original Assignee: Graftech International Holdings Inc (Graftech International Limited)
• Inventors: Reis, Bradley E., Reynolds, Robert Anderson III, Xiong, Yin, Kramer, Gregory P., Elahee, G M Fazley, Lee, Seung Yong
• Primary Examiner(s): Kim, Dennis Y
• Application Number:
  US13/452,698
• Publication Number:
  US 20130278863A1
• Time in Patent Office: 1,320 Days
• Field of Search: 349/161
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans

Abstract

A display device includes a heat sink and an LCD panel having peripheral edges. The LCD panel includes a non-activated area extending inwardly a predetermined distance from the peripheral edges. A thermal link is provided, made from an anisotropic graphite material, and is in thermal contact with the heat sink and with at least a portion of the non-activated area of said LCD panel.

Claims

1. An LCD display device comprising:

a heat sink comprising a metal chassis;

an LCD panel having peripheral edges and including a non-activated area extending inwardly a predetermined distance from the peripheral edges;

a thermal link made from an anisotropic graphite material, said thermal link in thermal contact with said heat sink and with at least a portion of said non-activated area of said LCD panel wherein the thermal link comprises;

a first portion having a surface that contacts at least a portion of the non-activated area, said first portion including a first end and a second end extending outwardly from the non-activated area, said first portion being generally co-planar with the LCD panel,

a second portion extending from said second end of said first portion and terminating at a third portion, said second portion being aligned generally perpendicular to said first portion surface and said third portion having a surface aligned generally parallel to said first portion surface, and

wherein said third portion surface contacts the heat sink and wherein said first portion, said second portion and said third portion form a generally J-shaped cross-section; and

a back-light optics assembly having a rear facing surface and a forward facing surface, said back-light optics assembly interposed between said chassis and said LCD panel, said back-light optics assembly having a heat dispersion material engaging the rear facing surface, said heat dispersion material made from an anisotropic graphite material.

2. The display device of claim 1 wherein said anisotropic graphite material comprises one or more sheets of compressed exfoliated particles of natural graphite.

3. The display device of claim 1 wherein the anisotropic graphite material comprises one or more sheets of graphitized polyamide.

4. The display device of claim 1 wherein said thermal link is adhesively secured to a rear facing surface of said chassis.

5. The display device of claim 1 wherein said LCD panel includes an input edge where an electrical connector interfaces with said LCD panel, said thermal link being in thermal contact with at least a portion of said non-activated area of said LCD panel along said input edge.

6. The display device of claim 1 wherein said LCD panel includes a front facing surface and a rear facing surface and four corners, said thermal link extends along said front or rear surface a predetermined distance from at least two corners.

7. The display device of claim 6 wherein said thermal link extends along said front or rear surface a predetermined distance from all four corners.

8. The display device of claim 1 wherein the anisotropic graphite material exhibits an in-plane thermal conductivity of at least 300 W/m-K.

9. The display device of claim 1 wherein the anisotropic graphite material exhibits and in-plane thermal conductivity of at least 700 W/m-K.