# US 11,906,155 B2 · Light source system and light-emitting device

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- Number: US 11,906,155 B2
- Document ID: US11906155B2
- Status: Granted
- Kind: B2
- Application number: 17/756,115
- Filed: 2020-10-27
- Published: 2022-12-15
- Granted: 2024-02-20
- Earliest claimed: 2019-11-18
- Assignees: YLX Incorporated
- Applicants: Ylx Incorporated
- Inventors: Quan Zhang; Jinjiang Fu; Hui Chen
- Web page: https://patentgrep.com/patent/US11906155B2

## CPC

- F21V 5/007: {Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008)}
- G03B 21/2033: {LED or laser light sources}
- F21V 5/004: {using microlenses}
- F21V 5/008: {Combination of two or more successive refractors along an optical axis}
- G02B 3/0062: {Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between}
- G02B 19/0009: {having refractive surfaces only}
- G02B 19/0014: {at least one surface having optical power}
- G02B 19/0066: {in the form of an LED array}
- G02B 27/0961: {Lens arrays (lens arrays per se G02B3/0006)}
- G03B 21/2013: {Plural light sources}
- G03B 21/208: {Homogenising, shaping of the illumination light}
- F21Y 2105/12: characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- 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
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A light source system and a light-emitting device are provided. The light source system includes an array of light-emitting diodes, the light-emitting diodes including light-emitting diode chips; a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, the collimating lens group being configured to collimate light beams emitted by the light-emitting diode chips; and a fly-eye lens arranged on a light path of light outputted from the collimating lens group. The fly-eye lens includes micro lens units corresponding to the light-emitting diode chips, and for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units. A ratio of side lobes is reduced, thereby improving the energy utilization rate.

## Claims

### Claim 1

A light source system, comprising:
an array of light-emitting diodes, wherein the light-emitting diodes comprise light-emitting diode chips;
a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, wherein the collimating lens group is configured to collimate light beams emitted by the light-emitting diode chips; and
a fly-eye lens arranged on a light path of light outputted from the collimating lens group, wherein the fly-eye lens comprises micro lens units corresponding to the light-emitting diode chips,
wherein for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of the at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units, and
wherein the fly-eye lens comprises a front fly-eye lens sub-unit and a back fly-eye lens sub-unit, wherein the back fly-eye lens subunit is located at a focal plane of the front fly-eye lens sub-unit.

### Claim 2 (depends on 1)

The light source system according to claim 1, wherein a respective light-emitting diode chip, from which a respective image formed by light beams on the micro lens units is completely within one of the micro lens units, accounts for greater than or equal to 30% of a number of all of the light-emitting diode chips.

### Claim 3 (depends on 1)

The light source system according to claim 1, wherein an image formed by one of the light-emitting diode chips on the surfaces of the micro lens units has a center coinciding with a center of one of the micro lens units.

### Claim 4 (depends on 3)

The light source system according to claim 3, wherein an orthographic projection of one of the micro lens units has a shape of a regular hexagon, and an image formed by one of the light-emitting diode chips on the surfaces of the micro lens units has a shape of a rectangle.

### Claim 5 (depends on 4)

The light source system according to claim 4, wherein the image formed by the one of the light-emitting diode chips on the surfaces of the one micro lens units has a short side shorter than a side of the one of the micro lens units, and a long side shorter than a distance between two parallel sides of the one of the micro lens units.

### Claim 6 (depends on 4)

The light source system according to claim 4, wherein the image formed by the one of the light-emitting diode chips on the surfaces of the one micro lens units has a short side parallel to two parallel sides of the one of the micro lens units that directly faces towards the one of the light-emitting diode chips.

### Claim 7 (depends on 1)

The light source system according to claim 1, wherein an image formed by one of the light-emitting diode chips on a surface of the back fly-eye lens sub-unit is completely within the surface of the back fly-eye lens sub-unit.

### Claim 8 (depends on 1)

The light source system according to claim 1, further comprising:
a condensing lens and a diaphragm, wherein the condensing lens is arranged on a light path of light outputted from the fly-eye lens, and the condensing lens is configured to collect and condense light beams outputted from the fly-eye lens and then guide the condensed light beams to the diaphragm.

### Claim 9

A light-emitting device, comprising a light source system, wherein the light source system comprises:
an array of light-emitting diodes, wherein the light-emitting diodes comprise light-emitting diode chips;
a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, wherein the collimating lens group is configured to collimate light beams emitted by the light-emitting diode chips; and
a fly-eye lens arranged on a light path of light outputted from the collimating lens group, wherein the fly-eye lens comprises micro lens units corresponding to the light-emitting diode chips, and for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of the at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units,
wherein the fly-eye lens comprises a front fly-eye lens sub-unit and a back fly-eye lens sub-unit, wherein the back fly-eye lens sub-unit is located at a focal plane of the front fly-eye lens sub-unit.