Source: https://patents.google.com/patent/US7604388?oq=FRAIOLI
Timestamp: 2018-06-20 13:45:35
Document Index: 330976368

Matched Legal Cases: ['§120', 'arts 142', 'arts 142', 'arts 402', 'arts 402', 'art 134', 'arts 402', 'arts 1134', 'arts 402', 'arts 402']

US7604388B2 - Light-guiding plate, lighting device and display device - Google Patents
US7604388B2
US7604388B2 US12071404 US7140408A US7604388B2 US 7604388 B2 US7604388 B2 US 7604388B2 US 12071404 US12071404 US 12071404 US 7140408 A US7140408 A US 7140408A US 7604388 B2 US7604388 B2 US 7604388B2
US12071404
US20080212339A1 (en )
This application is a Continuation Application of application Ser. No. 11/103,453, filed Apr. 12, 2005 now U.S. Pat. No. 7,356,239 which is now allowed, and which is a Divisional Application of and claims parent benefit under 35 U.S.C. §120 to application Ser. No. 10/724,293, filed Dec. 1, 2003, now patented as U.S. Pat. No. 6,974,241, and claims priority benefit of Japanese Application Nos. 2002-347302, 2003-342724 and 2003-361180, filed Nov. 29, 2002, Oct. 1, 2003 and Oct. 21, 2003, the disclosures of which are incorporated herein by reference.
The prism sheet 26 is also called a “lenticular lens sheet” and has a typically flat front surface at the side close to the liquid crystal panel 90 and a back surface having a plurality elongated triangular and quadrangular prism parts 142 parallel to the longitudinal direction of the light source at the side close to the light-guiding plate 12, that is, the Y-direction. The inclined surfaces of the triangular and quadrangular prism parts 142 are inclined by an angle in the angular range of an angle of 30 degrees to 35 degrees, for example, .+−.about 32.4 degrees, with respect to the line perpendicular to the plane of the flat front surface. The prism sheet 26 refracts and reflects the light striking the back surface by about 30 degrees (angle of incidence to plane of about 60 degrees) with respect to the front surface and radiates it from the front surface toward the diffusion sheet 24 in the substantially perpendicular direction.
FIG. 41A—shows a perspective view of a prism sheet 40 having prism parts 402 and 404 divided along the Y-direction by a plurality of grooves. FIGS. 41B to 41D show side views of the prism sheet seen along the B-, C-, and D-directions (Y-direction, X-direction and -X-direction) in FIG. 41A. The prism parts 402 and 404 are formed into pyramid shapes. The plurality of grooves in the X-direction or the prism shapes are provided as alternative configurations to the prism part 134 of the top surface of the light-guiding plate 12. Therefore, in this case, the top surface 134 of the light-guiding plate is flat. When the prism parts 402 and 404 are not pyramid shapes as shown in FIG. 41A, that is, when the peak line of the plurality of prism parts 1134 at the top surface of the light-guiding plate 12 (FIG. 32) and the peak line of the plurality of prism parts 402 and 404 of the prism sheet 26 intersect with each other, vibration from the outside to the liquid crystal display 100 will cause the light-guiding plate 12 and the prism parts 402 and 404 to rub against each other at those peak lines and thereby the peak line parts of the prisms will be damaged. Such damage can be prevented by the pyramid structure of FIG. 41A.
US12071404 2002-11-29 2008-02-20 Light-guiding plate, lighting device and display device Expired - Fee Related US7604388B2 (en)
JP2002-347302 2002-11-29
JP2003-342724 2003-10-01
JP2003-361180 2003-10-21
US10724293 US6974241B2 (en) 2002-11-29 2003-12-01 Light-guiding plate, lighting device and display device
US20080212339A1 true US20080212339A1 (en) 2008-09-04
US7604388B2 true US7604388B2 (en) 2009-10-20
US11103437 Active US7726864B2 (en) 2002-11-29 2005-04-12 Light-guiding plate, lighting device and display device
JP2008153057A (en) 2006-12-18 2008-07-03 Citizen Electronics Co Ltd Light source unit, backlight unit, and display device
CN107735706A (en) * 2015-05-13 2018-02-23 康宁股份有限公司 The light guide has a reduced hot spots and a method for manufacturing the light guide
JPH10153777A (en) * 1996-11-21 1998-06-09 Omron Corp Liquid crystal display device
JP2000306410A (en) 1999-04-22 2000-11-02 Nippon Denyo Light guide plate and flat lighting system
US6879355B1 (en) 1999-08-19 2005-04-12 Lg. Philips Lcd Co., Ltd. Back light unit in liquid crystal display
US20060114372A1 (en) * 2004-11-29 2006-06-01 Ken Saito Display panel
Office Action (Notice for Reasons of Rejection) issued on Jan. 13, 2009 by the Japanese Patent Office.
Partial translation of JP 10-253957.
Partial translation of JP 2000-260216.
Partial translation of JP 2002-216522.
Partial translation of JP 9-166713.
US6974241B2 (en) 2005-12-13 grant