Patent ID: 9720159
Date: 2017-08-01
CPC Classifications: F21V,G02B,G02F

Claim:
1. A backlight assembly comprising: a reflective sheet; a light guide plate on the reflective sheet; an optical sheet on the light guide plate; a light source disposed at a lateral side of the light guide plate; a printed circuit board (PCB) on which the light source is disposed; and a wavelength conversion member disposed between the light source and the light guide plate; wherein the wavelength conversion member comprises: a tube; a host in the tube; an empty space in the tube; and a plurality of wavelength conversion particles in the host, wherein the tube comprises: a light incident part having a first refractive index and adjacent to the host; a light exit part having a second refractive index; a first distal end; a second distal end opposite to the first distal end; a first tube portion; a second tube portion adjacent to the first tube portion; and a midpoint between the first distal end and the second distal end along a first direction that is parallel to a central longitudinal axis of the tube, wherein the first tube portion extends from the first distal end to the midpoint and comprises the empty space and a portion of the host, wherein the second tube portion extends from the midpoint to the second distal end and comprises a portion of the host, wherein the light source comprises: a light emitting diode chip to generate a light; and a filling material to cover the light emitting diode chip, wherein the filling material has a third refractive index, wherein the light guide plate has a fourth refractive index, wherein at least one of the first refractive index and the second refractive index is different from the fourth refractive index, wherein the wavelength conversion particles comprise quantum dots (QDs), and wherein the tube extends continuously along the lateral side of the light guide plate.