US 9,810,832 B2
Illumination device, display device, and television receiving device
Yusuke Masuda, Osaka (JP)
Assigned to SHARP KABUSHIKI KAISHA, Osaka (JP)
Appl. No. 14/901,708
Filed by Sharp Kabushiki Kaisha, Osaka (JP)
PCT Filed Jun. 24, 2014, PCT No. PCT/JP2014/066632
§ 371(c)(1), (2) Date Dec. 28, 2015,
PCT Pub. No. WO2015/002017, PCT Pub. Date Jan. 8, 2015.
Claims priority of application No. 2013-138102 (JP), filed on Jul. 1, 2013.
Prior Publication US 2016/0282549 A1, Sep. 29, 2016
Int. Cl. G02F 1/1333 (2006.01); F21V 8/00 (2006.01); H04N 5/645 (2006.01); G02F 1/1335 (2006.01)
CPC G02B 6/0088 (2013.01) [G02B 6/005 (2013.01); G02B 6/0085 (2013.01); G02F 1/133308 (2013.01); G02F 1/133615 (2013.01); G02F 2001/133317 (2013.01); G02F 2001/133322 (2013.01); G02F 2001/133328 (2013.01); H04N 5/645 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An illumination device, comprising:
a light source;
an optical sheet having a rectangular shape and imparting an optical effect on light from the light source;
a display component having a rectangular shape and being provided on the optical sheet; and
a frame member having a frame shape surrounding the optical sheet and, on at least one edge of the optical sheet, selectively and directly or indirectly pressing an area that is located relatively more towards a center of said edge of the optical sheet than both sides of said edge so as to secure said area to the display component,
wherein the frame member has an engaging section formed on a portion thereon,
wherein the illumination device further comprises an engaging member that fits into the engaging section so as to secure, to the engaging section, a part of an area on the edge of the optical sheet that is outside the area where the optical sheet is secured to the display component,
wherein the engaging section protrudes from the frame member toward the optical sheet,
wherein the optical sheet has at least one opening in the area of the edge of the optical sheet that is outside the area where the optical sheet is secured to the display component by the frame member, the engaging section penetrating through said opening in the optical sheet,
wherein the frame member further includes a claw-shaped locking part formed on a portion thereon, said locking part protruding from the frame member towards the optical sheet,
wherein there are a plurality of the openings in the optical sheet, the openings being respectively provided in the center and said both sides on the edge of the optical sheet, and
wherein, among the openings in the optical sheet, the opening provided in areas respectively closer to said both sides than the center on the edge of the optical sheet has said locking part of the frame member penetrating therethrough, thereby locking the optical sheet to the locking part such that the optical sheet is slidable in a thickness direction thereof.