text: US5262928A US07838337 US83833792A US5262928A US 5262928 A US5262928 A US 5262928A US 07838337 US07838337 US 07838337 US 83833792 A US83833792 A US 83833792A US 5262928 A US5262928 A US 5262928A
  US07838337
  US07838337 1991-02-21 1992-02-20 Back lighting device Expired - Lifetime US5262928A (en)
  JP7869591A JP2730310B2 (en) 1991-02-21 1991-02-21 Panel backlight
  US07838337 Expired - Lifetime US5262928A (en) 1991-02-21 1992-02-20 Back lighting device
  EP0500089A1 (en) 1992-08-26 application
  DE69212662T2 (en) 1997-02-20 grant
  DE69212662D1 (en) 1996-09-19 grant
  EP0500089B1 (en) 1996-08-14 grant
  CN2496052Y (en) 2002-06-19 Improved, uniform and high efficiency side lighting type back light source
  JPH1021720A (en) 1998-01-23 Backlight device