Embodiments of the present disclosure, relating to the field of micro projector engines, provide a micro projection optical engine with a compact layout, small size, and convenient portability. The micro projection optical engine includes a light source and a DMD chip, and a collimating light-combining module, a fly-eye lens, a relay system, a first triangular prism, a compensation lens, a second triangular prism, and a projection lens that are successively disposed in a light exit direction of the light source.

A new projector design combines one spatial light modulator that affects only the phase of the illumination, and one spatial light modulator that only affects its amplitude (intensity). The phase-only modulator curves the wavefront of light and acts as a pre-modulator for a conventional amplitude modulator. This approach works with both white light and laser illumination, generating a coarse image representation efficiently, thus enabling, within a single image frame, significantly elevated highlights as well as darker black levels while reducing the overall light source power requirements.

An electro-optical device includes a mirror being positioned above a surface of a substrate and modulating light, and a torsion hinge being positioned between the mirror and the substrate and pivotably supporting the mirror. The electro-optical device includes beam portions being disposed between the mirror and the substrate at positions that do not overlap the mirror in plan view, and being supported by the substrate while being spaced away from the mirror and the substrate. Spring tips that regulate a pivot range of the mirror protrude from the beam portions toward positions that overlap the mirror in plan view.

A projection display unit includes, in a housing (120), a visible light illuminator, a light valve that modulates a first polarized component included in light outputted from the visible light illuminator, on a basis of an image signal, a projection lens that projects light modulated by the light valve onto a projection plane, a detection light-source section (30) that outputs invisible light for detection, and an imaging device that receives a second polarized component included in light that is based on the invisible light. The detection light-source section (30) is movable relative to the housing (120), and outputs the invisible light in a direction parallel to or a direction forming a fixed angle with respect to the projection plane (110).

A digital light processing projector includes a light machine having a shell. The shell is provided with a first positioning post and a second positioning post. A digital micromirror device is configured with a first positioning hole and a second positioning hole. The first positioning post is located in the first positioning hole. The second positioning post is located in the second positioning hole. The light machine includes a circuit board assembly, a pressing plate, and a first connection assembly for fixed connection with the shell, and fixation of the pressing plate, the circuit board assembly and the digital micromirror device on the shell.

A light reflecting element includes a support part 21, a hinge part 30, and a light reflecting part 40, in which the light reflecting part 40 includes a support layer and a light reflecting layer 50, the hinge part 30 includes a torsion bar portion 31, extending portions 34A and 34B extending from sides of the torsion bar portion 31, and movable pieces 35A and 35B extending from ends of the extending portions 34A and 34B, an end of the torsion bar portion 31 is fixed to the support part 21, the hinge part 30 is capable of being twisted and deformed around an axis of the torsion bar portion 31, the support layer is fixed to the movable pieces 35A and 35B, a recess 41D is provided at least in a portion of the support layer facing a space 35D located between the first movable piece 35A and the second movable piece 35B, and a stress adjusting layer 91 is provided on the support layer in parallel to the light reflecting layer 50 and separated from the light reflecting layer 50.

A light blocking member according to the present disclosure is for a projection video display device provided with an optical system that projects video light and a projection lens on which the video light is incident, the light blocking member being disposed between the optical system and the projection lens, the light blocking member including: a first light blocking portion that absorbs and converts into heat a part of unnecessary light unnecessary for the projection lens in the video light; and a reflector that reflects, as reflected light, light that is a part of the unnecessary light and that is not absorbed by the first light blocking portion.

One or more excitation energy sources emit light in an excitation spectrum and direct the emitted light as an excitation beam to the emitting surface of a wavelength conversion element directly or via reflection. Distinct areas of the emitting surface are coated with one or more distinct fluorescent phosphors. The phosphor-coated areas receive the excitation beam and generate a sequence of fluoresced light beams at a light output, each fluoresced beam of a narrow spectrum determined by the type of phosphor and the excitation spectrum. The fluoresced beams travel parallel to an emitting axis at a non-zero angle to axes associated with the excitation beams.

A projector includes a light source, a digital micro-mirror device (DMD), a first prism, a second prism, and a lens. The light source is used for emitting an incident light. The DMD is used for receiving and reflecting the incident light as an image light. The first prism is disposed between the light source and the DMD. The second prism is disposed between the first prism and the DMD. The first prism includes a first plane, a second plane, and an intermediate portion. The intermediate portion adjoins the first plane and includes a reflecting portion. The incident light from the second plane is reflected by the reflecting portion and then passes through the second plane. The second prism includes a fourth plane, a fifth plane, and a sixth plane. When the DMD is operated in an on-state, the image light passes through the sixth plane.

Devices and methods are described herein to measure optical power in scanning laser projectors. In general, the devices and methods utilize a filter component and photodiode to measure optical power being generated by at least one laser light source, with the filter component configured to at least partially compensate for the non-uniform electric current response of the photodiode. Such a configuration facilitates accurate optical power measurement using only one photodiode, and thus can facilitate accurate optical power measurement in a relatively compact device and with relatively low cost.