Color Liquid Crystal Displays and Display Backlights
AssigneeIntematix Corporation
InventorsYi-Qun Li, Xianglong Yuan
Life of this patent
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Abstract
A display backlight, comprises: an excitation source, LED (146), for generating blue excitation light (148) with a peak emission wavelength in a wavelength range 445 nm to 465 nm; and a photoluminescence wavelength conversion layer (152). The photoluminescence wavelength conversion layer (152) comprises a mixture of a green-emitting photoluminescence material with a peak emission in a wavelength range 530 nm to 545 nm, a red-emitting photoluminescence material with a peak emission in a wavelength range 600 nm to 650 nm and particles of light scattering material.
Claims13
(canceled)
A display backlight, comprising:
- a source for generating light with a wavelength of maximum intensity from 445 nm to 465 nm;
- and
- a multi-layer film comprising:
- a brightness enhancement film layer;
- and
- a phosphor film layer in direct contact with the brightness enhancement film layer;
- wherein the phosphor film layer comprises a light transmissive material, a narrow-band green phosphor, and narrowband-red phosphor, and
- wherein the narrowband-red phosphor is at least one selected from the group consisting of:
- K2SiF6:Mn4+, K2TiF6:Mn4+, CaSeS:Eu, and MSe1-xSx:Eu where M is at least one of Mg, Ca, Sr, and Ba.
A display backlight, comprising:
- a source for generating light with a wavelength of maximum intensity from 445 nm to 465 nm;
- and
- a multi-layer film comprising:
- a light diffusive film layer;
- and
- a phosphor film layer in direct contact with the light diffusive film layer;
- wherein the phosphor film layer comprises a light transmissive material, a narrow-band green phosphor, and narrowband-red phosphor, and
- wherein the narrowband-red phosphor is at least one selected from the group consisting of:
- K2SiF6:Mn4+, K2TiF6:Mn4+, CaSeS:Eu, and MSe1-xSx:Eu where M is at least one of Mg, Ca, Sr, and Ba.
Dependencies are inferred from the claim text.