Patent ID: 7901959
Filing Date: 2011-03-08
Classification: C09K,G02B,H01J,H01L,H05B,Y02B

Abstract:
1. A liquid crystal display comprising: a back light having a light emitting diode; a liquid crystal injected between glass substrates; and a color filter, wherein said light emitting diode comprising: an LED chip, a transparent material covering said LED chip, and a phosphor contained in said transparent material and absorbing a part of light emitted by said LED chip and emitting light of wavelength different from that of the absorbed light, wherein said LED chip emits light having a spectrum with a peak in the range from 420 to 490 nm, said phosphor emits light having a spectrum with a peak in the range from 530 to 570 nm and a tail continuing beyond 700 nm, and said spectrum of the light emitted from said phosphor and said spectrum of the light emitted from said LED chip overlap with each other to make a continuous combined spectrum, wherein a concentration of said phosphor in the vicinity of said LED chip is larger than a concentration of said phosphor in the vicinity of the surface of said transparent material.