Illumination apparatus for display device, display device using the same, and television receiver apparatus comprising the display device

• US 7,924,365 B2
• Filed: 03/02/2010
• Issued: 04/12/2011
• Est. Priority Date: 08/30/2005
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Takata, Yoshiki
• Primary Examiner(s): Wong; Tina M
• Application Number:
  US12/715,714
• Publication Number:
  US 20100157576A1
• Time in Patent Office: 406 Days
• Field of Search: None
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist

Abstract

In a backlight apparatus, laminated optical sheets are housed in a tray such that a wall portion thereof surrounds their circumferences so that the optical sheets receive light from fluorescent lights. Tips of one corner portion A of optical sheets preferably have a shape in which the tips are trimmed by line segments extending between two edges defining the corner portions. At the wall portion of the tray, an opposing surface is formed along the line segments of the corner portions so as to correspond to the shape of the corner portions having tips trimmed off. The opposing surface restrains the line segments.

Claims

1. A lighting device comprising:

a tray including a wall portion; and

an optical sheet disposed inside the tray and including a first corner portion, a second corner portion, and a third corner portion;

wherein

the first corner portion and the third corner portion, both of which include a trimmed portion, are provided at diagonally opposing corner portions;

the second corner portion does not include any trimmed portions; and

the wall portion is arranged on the tray to oppose the trimmed portion of the first corner portion.

2. A lighting device of claim 1, wherein the trimmed portion of the first corner portion is defined by a line extending from one side of the optical sheet to an adjacent side of the optical sheet.

3. A display device comprising;

the lighting device of claim 1; and

a display panel.