A star projection lamp

Abstract

The invention discloses a starry sky projection lamp. The starry sky projection lamp comprises a multi-color light source array, an optical path, a first diaphragm, a second diaphragm, a collimating lens and a reflector array which are sequentially arranged along optical path, and further comprises a support for installing the multi-color light source array, the first diaphragm and the second diaphragm, the multi-color light source array comprises at least two light sources which are arranged in a spaced mode and are different in color, the first diaphragm is provided with a first light passing hole which is in one-to-one correspondence with the light sources in the multi-color light source array and is smaller than the light-emitting surface of the corresponding light source, a second light passing hole corresponding to the first light through hole one to one is formed in the second diaphragm, and the minimum incidence angle of the light source projected to the first light passing hole corresponding to the adjacent light source is larger than half of the collection angle of the light ray of the second light passing hole corresponding to the first light passing hole. According to the starry sky projection lamp, the starry sky projection effect of multiple colors can be achieved, more projection requirements can be met, the size of the light spots can be reduced, more stars areprojected, stray light emitted from the first light passing hole is well shielded, and the starry projection effect is improved.

Description

technical field [0001] The invention relates to the technical field of lighting, in particular to a star projection lamp. Background technique [0002] Star projection lamp is a decorative lighting device that projects countless stars or snowflakes on the walls, ceilings, and lawns. It is used indoors such as KTV boxes, and outdoors such as courtyards, lawns, and plants. It can create atmosphere and decorate The role of landscape has a very wide range of applications in life. [0003] At present, the star projection lamps on the market all use laser diodes as light sources, but laser diodes are almost monochromatic in red, green and blue, and cannot effectively synthesize white, so it is difficult to form white patterns. In addition, the current star projection lamps are usually monochromatic projection lamps, which require multiple projection lamps to achieve color effects, which is inconvenient to use. Moreover, the existing star projection lamps are large in size and hig...

AI Technical Summary

Problems solved by technology

[0003] At present, the star projection lamps on the market all use laser diodes as light sources, but laser diodes are almost monochromatic in red, green and blue, and cannot effectively synthesize white, so it is difficult to form white patterns.

In addition, the current star projection lamps are usually monochromatic projection lamps, which require multiple projection lamps to achieve color effects, which is inconvenient to use, and the existing star projection lamps are large in size and high in cost, which cannot meet the needs of practical applications

In addition, the number of stars projected by existing star projection lamps is limited, which affects the effect of star projection

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