VCSEL array light source

1. A Vertical-Cavity Surface-Emitting Laser (VCSEL) array light source, comprising:

a semiconductor substrate; and

a plurality of VCSEL light sources arranged on the semiconductor substrate in a two-dimensional array;

wherein:

the two-dimensional array includes a first sub-array and a plurality of second sub-arrays,

the first sub-array includes a plurality of VCSEL light sources that are arranged randomly, and

a first one of the second sub-arrays disposed against a right boundary of the first sub-array is generated by transforming the first sub-array in a first transforming method, a second one of the second sub-arrays disposed against a lower boundary of the first sub-array is generated by transforming the first sub-array in a second transforming method different from the first transforming method.

2. The VCSEL array light source according to claim 1 , wherein the first sub-array and the second sub-arrays are distributed within a regular region, an irregular region, or a combination of a regular region and an irregular region.

3. The VCSEL array light source according to claim 2 , wherein the regular region includes a polygonal region or a circular region.

4. The VCSEL array light source according to claim 1 , wherein the first transforming method is one of translating, rotating, mirroring, and scaling the first sub-array to generate the first one of the second sub-arrays, and the second transforming method is another one of translating, rotating, mirroring, and scaling the first sub-array to generate the second one of the second sub-arrays.

5. The VCSEL array light source according to claim 1 , wherein two adjacent sub-arrays of the two-dimensional array are partially overlapping with each other, separated by a space without a VCSEL light source, or overlapping with each other at edges thereof.

6. The VCSEL array light source according to claim 1 , wherein the first sub-array and each one of the second sub-arrays are different in at least one aspect of a size, a distribution shape, or a number of light sources.

7. The VCSEL array light source according to claim 1 , wherein the semiconductor substrate includes a plurality of sub-substrates, and the sub-arrays are arranged on the plurality of sub-substrates respectively.

8. A pattern design method for a Vertical-Cavity Surface-Emitting Laser (VCSEL) array light source, comprising:

generating an irregularly arranged sub-array pattern that including light sources arranged irregularly; and

generating a pattern of a two-dimensional array, wherein the pattern of a two-dimensional array includes a plurality of sub-array patterns and the irregularly arranged sub-array pattern, a first one of the sub-array patterns disposed against a right boundary of the irregularly arranged sub-array pattern is generated by transforming the irregularly arranged sub-array pattern in a first transforming method, and a second one of the sub-array patterns disposed against a lower boundary of the irregularly arranged sub-array pattern is generated by transforming the irregularly arranged sub-array pattern in a second transforming method different from the first transforming method.

9. A Vertical-Cavity Surface-Emitting Laser (VCSEL) array light source, comprising:

a semiconductor substrate; and

a plurality of VCSEL light sources arranged on the semiconductor substrate in the form of a two-dimensional array; wherein:

the two-dimensional array includes a first sub-array and a plurality of second sub-arrays,

the first sub-array includes a plurality of VCSEL light sources that are arranged randomly, and

a first one of the second sub-arrays disposed against a right boundary of the first sub-array is generated by transforming first sub-array in a first transforming method, a second one of the second sub-arrays disposed against a lower boundary of the first sub-array is generated by transforming first sub-array in a second transforming method different from the first transforming method; and

the first sub-array and each of the second sub-arrays are different in at least one aspect of a size, a distribution shape, or a number of light sources.

10. A laser projection apparatus, comprising:

the VCSEL array light source according to claim 1 ;

at least one lens configured to receive and converge a light beam emitted from the VCSEL array light source; and

a speckle pattern generator configured to expand the converged light beam to emit a speckle pattern beam into a space; wherein

the at least one lens includes a single lens or a microlens array; and

the speckle pattern generator includes one or more of a microlens array, a diffractive optical element, or a grating.

11. A three-dimensional (3D) imaging device, comprising:

the laser projection apparatus according to claim 10 , wherein the laser projection apparatus is configured to emit a structured light pattern beam into the space;

an image acquisition apparatus configured to collect a structured light image, wherein the structured light image is formed by irradiating the structured light pattern beam on a target object; and

a processor configured to receive the structured light image and calculate a depth image of the target object according to a trigonometric principle.

12. The VCSEL array light source according to claim 1 , wherein the first one of the second sub-arrays disposed against the right boundary of the first sub-array is generated by scaling the first sub-array, and the second one of the second sub-arrays disposed against the lower boundary of the first sub-array is generated by translating the first sub-array downward.