Illuminating assembly applied to laser projection device and laser projection device

Abstract

The invention provides an illuminating assembly applied to a laser projection device. The illuminating assembly comprises a first spherical lens, a second spherical lens, a non-spherical lens and a TIR prism which are sequentially arranged along a light path emergent from a light guide pipe to a light valve, wherein the incident surface of the first spherical lens is a concave surface, and the emergent surface of the first spherical lens is a convex surface; both the incident surface and the emergent surface of the second spherical lens are convex surfaces; the incident surface of the non-spherical lens is a convex surface; the diopter Phi 1 of the first spherical lens is positive and is greater than or equal to 17D and less than or equal to 56D; and the diopter Phi 2 of the second spherical lens is positive and is greater than or equal to 24.5D and less than or equal to 33.5D. The refraction angle of a light beam in an illuminating light path can be increased, the transverse propagation distance of the light path can be shortened, and the transverse size of the illuminating assembly can be greatly reduced.

Description

technical field [0001] The invention relates to the field of projection technology, in particular to an illumination assembly and a laser projection device applied to a laser projection device. Background technique [0002] A projection device is a device that can project images or videos onto a screen, and is widely used in homes, offices, schools, and entertainment venues. As an emerging projection display technology, laser projection products have higher brightness and lifespan than LED projection products. However, at present, laser projectors generally have the problems of large size and high price, which seriously affects the development of laser cinemas. [0003] Such as figure 1 , 2 As shown, it is a schematic structural diagram of the lighting components in the projection device used in the design of the lighting system in the prior art. The prior art generally adopts the architectural mode of 4 spherical lenses, 2 flat reflectors, and TIR, that is, 4 spherical ...

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Problems solved by technology

[0005] The object of the present invention is to provide a lighting assembly used in a laser projection device, so as to solve the defects of large volume and high cost of the lighting assembly in the laser projection device proposed in the background art

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