# US 11,307,488 B2 · Light source system

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- Number: US 11,307,488 B2
- Document ID: US11307488B2
- Status: Granted
- Kind: B2
- Application number: 16/910,002
- Filed: 2020-06-23
- Published: 2021-09-16
- Granted: 2022-04-19
- Earliest claimed: 2020-03-10
- Assignees: Delta Electronics, Inc.
- Applicants: Delta Electronics, Inc.
- Inventors: Hung-Ying Lin
- Web page: https://patentgrep.com/patent/US11307488B2

## CPC

- G03B 21/204: {using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197)}
- G02B 26/008: {in the form of devices for effecting sequential colour changes, e.g. colour wheels}
- G03B 21/2066: {Reflectors in illumination beam (in projection beam G03B21/28)}
- G03B 33/08: Sequential recording or projection (G03B33/02, G03B33/04, G03B33/06 take precedence)
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A light source system includes a fluorescent wheel, a color wheel, at least one light reflector, and a light source module. The fluorescent wheel includes at least one fluorescent section. The color wheel includes a filter portion. The light reflector has a reflective curved surface having a first focal point and a second focal point conjugated to each other. The first focal point is located on a rotation path of the fluorescent section. The second focal point is located on a rotation path of the filter portion. The light source module is configured to emit light to the first focal point.

## Claims

### Claim 1

A light source system, comprising:
a fluorescent wheel comprising at least one fluorescent section;
a color wheel comprising a filter portion;
at least one light reflector having a reflective curved surface which has a first focal point and a second focal point conjugated to each other, wherein the first focal point is located on a rotation path of the at least one fluorescent section, and the second focal point is located on a rotation path of the filter portion; and
a light source module configured to emit light to the first focal point.

### Claim 2 (depends on 1)

The light source system of claim 1, wherein the reflective curved surface is a concave surface.

### Claim 3 (depends on 1)

The light source system of claim 1, wherein a contour of the reflective curved surface partially matches a contour of an ellipsoid.

### Claim 4 (depends on 1)

The light source system of claim 1, wherein the color wheel has a light-facing surface, and the light-facing surface has a normal line extending through the second focal point and the reflective curved surface.

### Claim 5 (depends on 1)

The light source system of claim 1, wherein the fluorescent wheel further comprises a substrate, and the at least one fluorescent section is disposed on the substrate.

### Claim 6 (depends on 5)

The light source system of claim 5, wherein the at least one light reflector is located at a side of the substrate.

### Claim 7 (depends on 5)

The light source system of claim 5, wherein the at least one light reflector extends to opposite sides of the substrate.

### Claim 8 (depends on 7)

The light source system of claim 7, wherein the at least one light reflector has a slit, and the fluorescent wheel partially passes through the slit.

### Claim 9 (depends on 7)

The light source system of claim 7, wherein the color wheel has a light-facing surface, and the light-facing surface has a normal line extending through the first focal point and the second focal point.

### Claim 10 (depends on 5)

The light source system of claim 5, wherein a number of the at least one light reflector is two, the two light reflectors are respectively located at opposite sides of the substrate, and the second focal points of the two light reflectors coincide.

### Claim 11 (depends on 5)

The light source system of claim 5, wherein the substrate is a reflective substrate.

### Claim 12 (depends on 5)

The light source system of claim 5, wherein the substrate is a transmissive substrate.

### Claim 13 (depends on 5)

The light source system of claim 5, wherein the fluorescent wheel further comprises a reflective section disposed on the substrate, and the at least one fluorescent section and the reflective section are arranged in a ring shape.