LIQUID CRYSTAL DISPLAY DEVICE

• US 20130088664A1
• Filed: 03/22/2011
• Published: 04/11/2013
• Est. Priority Date: 06/21/2010
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ohhashi, Masayuki
• Application Number:
  US13/700,677
• Publication Number:
  US 20130088664A1
• Time in Patent Office: Days
• US Class Current: 349/62
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist
• CPC Class Codes: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 1/0393 Flexible materials H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups
• CPC Class Codes: H05K 2201/10136 Liquid Crystal display [LCD]
• CPC Class Codes: H05K 2201/2054 Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics

Abstract

A flexible printed circuit board (20) connected to a liquid crystal panel (10) is folded back so as to overlap the back surface of an illuminating device (30). A surface treatment for preventing mutual interference between the flexible printed circuit board and a sheet (34) that constitutes the illuminating device and faces the flexible printed circuit board is applied to at least part of an area of the flexible printed circuit board that faces the sheet or at least part of an area of the sheet that faces the flexible printed circuit board. This configuration can suppress the occurrence of non-uniform brightness due to temperature changes.

Claims

1. A liquid crystal display device comprising:

a liquid crystal panel;

a flexible printed circuit board that is connected to the liquid crystal panel; and

an illuminating device that illuminates the liquid crystal panel, the flexible printed circuit board being folded back so as to overlap a surface of the illuminating device that is on an opposite side from the liquid crystal panel,

wherein a surface treatment for preventing mutual interference between the flexible printed circuit board and a sheet that constitutes the illuminating device and faces the flexible printed circuit board is applied to at least part of an area of the flexible printed circuit board that faces the sheet or at least part of an area of the sheet that faces the flexible printed circuit board.

2. The liquid crystal display device according to claim 1, wherein the surface treatment is silk printing.

3. The liquid crystal display device according to claim 1, wherein the surface treatment is an attachment of a resin sheet.

4. The liquid crystal display device according to claim 1, wherein the sheet is a reflecting sheet.

5. The liquid crystal display device according to claim 1, wherein the surface treatment includes a urethane resin layer.

6. The liquid crystal display device according to claim 1, wherein the surface treatment includes a polyester sheet.

7. The liquid crystal display device according to claim 1, wherein the surface treatment is applied to the flexible printed circuit board.