Patent ID: 7959321

Claim:
A backlight panel, comprising: a light guide plate for emitting light incident from a side direction, the light guide plate configured to emit light through a top surface thereof; white light emitting diodes arranged at a side of the light guide plate to emit white light into the light guide plate; and a diffusion plate positioned over the top surface of the light guide plate, wherein each of the white light emitting diodes comprises a blue light emitting diode chip and red and green phosphors positioned over the blue light emitting diode chip, and wherein the red phosphor is an alkaline earth metal sulfide-based red phosphor expressed as general formula, A x-a Eu a GeS z , where A is at least one element selected from the group consisting of Ca and Sr; z=x+2; x is set within a range of 2 to 5; and a/x is set within a range of 0.0005 to 0.02.