US 2001/0022566 A1 · Color laser display employing excitation solid laser unit, fiber laser unit, or semi conductor laser unit

Abstract

Disclosed herein is a color laser display that comprises a red laser light source for emitting red laser light, a green laser light source for emitting green laser light, and a blue laser light source for emitting blue laser light. An excitation solid laser unit (which has a solid-state laser crystal doped with Pr3+ and a GaN semiconductor laser element for exciting the solid-state laser crystal), a fiber laser unit (which has a fiber with a Pr3+-doped core and a GaN semiconductor laser element for exciting the fiber), or a semiconductor laser unit (which has a semiconductor laser element, employing a GaN semiconductor, and a surface-emitting semiconductor element), is employed as at least one of the red laser light source, the green laser light source, or the blue laser light source.

Claims28

Dependent claims

A color laser display comprising:

a red laser light source for emitting red laser light;
a green laser light source for emitting green laser light;
a blue laser light source for emitting blue laser light;
modulation means for modulating said red laser light, said green laser light, and said blue laser light, based on a red image signal, a green image signal, and a blue image signal;
a screen for displaying red, green, and blue when irradiated with said red laser light, said green laser light, and said blue laser light;
and
projection means for projecting said red laser light, said green laser light, and said blue laser light onto said screen so that an image, carrying said red, green, and blue image signals, is displayed on said screen;
wherein an excitation solid laser unit, having a solid-state laser crystal doped with Pr3+ and a GaN semiconductor laser element for exciting said solid-state laser crystal, is employed as at least one of said red laser light source, said green laser light source, or said blue laser light source.

5 more elements

A color laser display comprising:

a red laser light source for emitting red laser light;
a green laser light source for emitting green laser light;
a blue laser light source for emitting blue laser light;
modulation means for modulating said red laser light, said green laser light, and said blue laser light, based on a red image signal, a green image signal, and a blue image signal;
a screen for displaying red, green, and blue when irradiated with said red laser light, said green laser light, and said blue laser light;
and
projection means for projecting said red laser light, said green laser light, and said blue laser light onto said screen so that an image, carrying said red, green, and blue image signals, is displayed on said screen;
wherein a semiconductor laser unit is employed as at least one of said red laser light source, said green laser light source, or said blue laser light source, and said semiconductor laser unit includes an excitation light source constructed of a semiconductor laser element employing a GaN semiconductor in its active layer, and also includes a surface-emitting semiconductor element for emitting laser light when excited with said excitation light source.

5 more elements

Dependencies are inferred from the claim text.

Color laser display employing excitation solid laser unit, fiber laser unit, or semi conductor laser unit

Life of this patent

Color laser display employing excitation solid laser unit, fiber laser unit, or semi conductor laser unit

Life of this patent

Abstract

Claims28