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.
Claims18
A display backlight, comprising:
- an excitation source for generating blue excitation light with a peak emission wavelength in a wavelength range 445 nm to 465 nm;
- and
- a photoluminescence wavelength conversion layer;
- wherein the photoluminescence wavelength conversion layer 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.
A display backlight, comprising:
- an excitation source for generating blue excitation light with a peak emission wavelength in a wavelength range 445 nm to 465 nm;
- a brightness enhancement film;
- and
- a photoluminescence wavelength conversion layer;
- wherein the photoluminescence wavelength conversion layer comprises a mixture of a green-emitting photoluminescence material with a peak emission in a wavelength range 530 nm to 545 nm and a red-emitting photoluminescence material with a peak emission in a wavelength range 600 nm to 650 nm, and particles of light scattering material;
- wherein the photoluminescence wavelength conversion layer is in direct contact with the brightness enhancement film.
A display backlight, comprising:
- an excitation source for generating blue excitation light with a peak emission wavelength in a wavelength range 445 nm to 465 nm;
- a brightness enhancement film;
- a photoluminescence wavelength conversion layer;
- and
- a light guide,
- wherein the photoluminescence wavelength conversion layer comprises a mixture of a green-emitting photoluminescence material with a peak emission in a wavelength range 530 nm to 545 nm and a red-emitting photoluminescence material with a peak emission in a wavelength range 600 nm to 650 nm, and particles of light scattering material,
- wherein the excitation source is configured to couple excitation light into at least one edge of the light guide;
- and
- wherein the photoluminescence wavelength conversion layer is in direct contact with the light guide.
Dependencies are inferred from the claim text.