Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

2006-11-22

2008-12-16

Sanghavi, Hemang (Department: 2874)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S056000, C349S106000, C313S486000, C313S503000, C252S30140P

Reexamination Certificate

active

07466375

ABSTRACT:
A liquid crystal display device includes a light source and a liquid crystal display panel. The light source includes a blue-emitting phosphor configured to emit blue light, a green-emitting phosphor configured to emit green light, and a red-emitting phosphor configured to emit red light. The liquid crystal display panel includes color filters configured to control the transmittance of light from the light source and transmit one of blue, green, and red light on a pixel basis. The green-emitting phosphor is represented by a compositional formula of (La1−x−y,Tbx,Cey)PO4, wherein “x” and “y” are compositional ratios satisfying both the following conditions: 0.500<(x+y)<0.700 and 1.20<(y/x)<2.00. The compositional ratios “x” and “y” preferably satisfy the following conditions: 0.50<(x+y)<0.65 and 1.50<(y/x)<1.70.

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Jean-Claude Bourcet et al., “Quantum Efficiency of Diffusion Limited Energy Transfer in La1−x−yCExTByPO4”, The Journal of Chemical Physics, vol. 60, No. 1, Jan. 1, 1974, pp. 34-39.

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