Harness, Dickey & Pierce, P.L.C.
Light emitting device and backlight source
The light emitting device includes a light emitting diode and an optical lens, the optical lens includes a light incidence surface and a light exit surface, the light incidence surface includes a first light incidence surface and a second light incidence surface, herein the ratios of the minimum ones to the maximum ones of the distances between respective points, on the first light incidence surface or the second light incidence surface, and the center of the light emission surface respectively belongs to [0.5, 0.7] or [0.683, 0.695]; and the convex surface includes a first light exit surface and a second light exit surface, herein the ratios of the minimum ones to the maximum ones of the distances between respective points, on the first light exit surface or the second light exit surface, and the center of the light emission surface respectively belongs to [0.771, 0.913], or [0.883, 0.921].
HISENSE INTERNATIONAL CO., LTD. HISENSE USA CORPORATION HISENSE ELECTRIC CO., LTD.
G G F
G02B G02F F21V
inventional additional inventional
Xiaoping Qiang Mingsheng
Li Zhong Qiao