US 11,899,353 B2Granted

Illumination system and projection apparatus

AssigneeCoretronic Corporation

InventorWan-Ting Hsieh

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Abstract

An illumination system comprises an exciting light source, a phosphor wheel, a first lens, a first reflector, and a light uniforming element. The exciting light source emits an excitation beam. In a first time sequence, the phosphor wheel reflects the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and transmits to the light uniforming element. In a second time sequence, the phosphor wheel converts the excitation beam to a conversion beam, the conversion beam from the phosphor wheel passes through the first lens and transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and transmits to the light uniforming element, the excitation beam and the conversion beam, sequentially and respectively transmits to the light uniforming element.

Claims24

Dependent claims

An illumination system for providing an illumination beam, comprising an exciting light source, a phosphor wheel, a first lens, a first reflector, and a light uniforming element, wherein:

the exciting light source is configured to emit an excitation beam, and the excitation beam passes through the first lens and then is transmitted to the phosphor wheel,
wherein the first reflector is disposed on an optical axis of the first lens, and the first reflector is not disposed on a transmission path of the excitation beam from the exciting light source to the first lens;
in a first time sequence, the phosphor wheel is configured to reflect the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and then transmits to the light uniforming element;
and
in a second time sequence, the phosphor wheel is configured to convert the excitation beam to a conversion beam, the conversion beam emitted from the phosphor wheel passes the first lens and then transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and then transmits to the light uniforming element,
wherein the excitation beam from the phosphor wheel and the conversion beam from the phosphor wheel, in the first time sequence and in the second time sequence, are respectively transmitted to the light uniforming element to generate the illumination beam.

3 more elements

An illumination system for providing an illumination beam, comprising an exciting light source, a phosphor wheel, a first lens, a first reflector, a second lens and a light uniforming element, wherein:

the exciting light source is configured to emit an excitation beam, and the excitation beam passes through the first lens and then is transmitted to the phosphor wheel;
in a first time sequence, the phosphor wheel is configured to reflect the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and then transmits to the light uniforming element;
and
in a second time sequence, the phosphor wheel is configured to convert the excitation beam to a conversion beam, the conversion beam emitted from the phosphor wheel passes the first lens and then transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and then transmits to the light uniforming element,
wherein the excitation beam from the phosphor wheel and the conversion beam from the phosphor wheel, in the first time sequence and in the second time sequence, are respectively transmitted to the light uniforming element to generate the illumination beam,
wherein the first reflector comprises a light splitting region and a reflecting region, wherein
the excitation beam from the exciting light source passes through the light splitting region and then is transmitted to the first lens;
in the first time sequence, the excitation beam passing through the first lens is reflected to the first lens by the reflecting region;
and
in the second time sequence, the conversion beam passing through the first lens is reflected to the first lens by the light splitting region or the reflecting region,
wherein the second lens is disposed between the first lens and the phosphor wheel, wherein an optical axis of the first lens and an optical axis of the second lens are not parallel to each other.

8 more elements

A projection apparatus, comprising an illumination system, a light valve and a projection lens, wherein the illumination system is configured to provide an illumination beam, the light valve is disposed on a transmission path of the illumination beam to convert the illumination beam into an image beam, and the projection lens is disposed on a transmission path of the image beam to project the image beam out of the projection apparatus,

the illumination system comprising an exciting light source, a phosphor wheel, a first lens, a first reflector, and a light uniforming element, wherein:
the exciting light source is configured to emit an excitation beam, and the excitation beam passes through the first lens and then is transmitted to the phosphor wheel,
wherein the first reflector is disposed on an optical axis of the first lens, and the first reflector is not disposed on a transmission path of the excitation beam from the exciting light source to the first lens;
in a first time sequence, the phosphor wheel is configured to reflect the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and then transmits to the light uniforming element;
and
in a second time sequence, the phosphor wheel is configured to convert the excitation beam to a conversion beam, the conversion beam emitted from the phosphor wheel passes the first lens and then transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and then transmits to the light uniforming element,
wherein the excitation beam from the phosphor wheel and the conversion beam from the phosphor wheel, in the first time sequence and in the second time sequence, are respectively transmitted to the light uniforming element to generate the illumination beam.

4 more elements

the illumination system comprising an exciting light source, a phosphor wheel, a first lens, a first reflector, a color filter wheel and a light uniforming element, wherein:
the exciting light source is configured to emit an excitation beam, and the excitation beam passes through the first lens and then is transmitted to the phosphor wheel;
in a first time sequence, the phosphor wheel is configured to reflect the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and then transmits to the light uniforming element;
and
in a second time sequence, the phosphor wheel is configured to convert the excitation beam to a conversion beam, the conversion beam emitted from the phosphor wheel passes the first lens and then transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and then transmits to the light uniforming element,
wherein the excitation beam from the phosphor wheel and the conversion beam from the phosphor wheel, in the first time sequence and in the second time sequence, are respectively transmitted to the light uniforming element to generate the illumination beam,
wherein the color filter wheel is disposed between the first lens and the light uniforming element, wherein the excitation beam and the conversion beam passing through the first lens pass through the color filter wheel and then are transmitted to the light uniforming element,
wherein along an optical axis direction of the first lens, the phosphor wheel partially overlaps the color filter wheel.

5 more elements

the illumination system comprising an exciting light source, a phosphor wheel, a first lens, a first reflector, a second lens and a light uniforming element, wherein:
the exciting light source is configured to emit an excitation beam, and the excitation beam passes through the first lens and then is transmitted to the phosphor wheel;
in a first time sequence, the phosphor wheel is configured to reflect the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and then transmits to the light uniforming element;
and
in a second time sequence, the phosphor wheel is configured to convert the excitation beam to a conversion beam, the conversion beam emitted from the phosphor wheel passes the first lens and then transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and then transmits to the light uniforming element,
wherein the excitation beam from the phosphor wheel and the conversion beam from the phosphor wheel, in the first time sequence and in the second time sequence, are respectively transmitted to the light uniforming element to generate the illumination beam,
wherein the first reflector comprises a light splitting region and a reflecting region, wherein
the excitation beam from the exciting light source passes through the light splitting region and then is transmitted to the first lens;
in the first time sequence, the excitation beam passing through the first lens is reflected to the first lens by the reflecting region;
and
in the second time sequence, the conversion beam passing through the first lens is reflected to the first lens by the light splitting region or the reflecting region, wherein the second lens is disposed between the first lens and the phosphor wheel, wherein an optical axis of the first lens and an optical axis of the second lens are not parallel to each other.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/697,955Filed 18 Mar 2022
Priority: CN 202120587060.323 Mar 2021
Published: US 2022/0308435 A129 Sep 2022
Granted: 13 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G03B 21/2066
Lamp housings: reflectors in illumination beam
G03B 33/08
Colour photography, other than mere exposure or projection of a colour film: sequential recording or projection
G02B 26/008
The movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light: in the form of devices for…
G02B 27/1006
Beam splitting or combining systems: for splitting or combining different wavelengths