Abstract: Embodiments of the present disclosure, provide a projection image anti jitter method and apparatus, and a projector. With the projection image anti jitter method, jitter data of a projection lens is captured; jitter characteristic information and offset data are acquired by calculation; and the projection image is adjusted based on the offset data.

Abstract: Embodiments of the present disclosure, provide a projection image anti-jitter method and apparatus, and a projector. With the projection image anti-jitter method, jitter data of a projection lens is captured; jitter characteristic information and offset data are acquired by calculation; and the projection image is adjusted based on the offset data.

Abstract: The present disclosure relates to the technical field of digital projection and display, and in particular, relates to a method for controlling a focusing assembly. The focusing assembly includes a lens module, a motor, a bevel retaining piece, and a photoelectric switch. The photoelectric switch includes an optical transmitter and an optical receiver that are oppositely disposed, the motor is connected to the lens module. The method includes: receiving a current voltage signal from the photoelectric switch; determining a current position of the lens module based on the current voltage signal; controlling the motor to stop driving the lens module in response to the current position of the lens module being the predetermined position.

Abstract: A bi-directional excitation color wheel includes a first working surface and a second working surface which are of the same size, wherein the first working surface includes a first working ring and a second working ring which are concentric rings; the second working surface includes a third working ring and a fourth working ring which are concentric rings; the first working ring includes a first translucent region and a green fluorescent region, the second working ring includes a second translucent region, the third working ring includes a third translucent region, and the fourth working ring includes a fourth translucent region and a first fluorescent region; the first translucent region and the third translucent region are the same translucent region, and the second translucent region and the fourth translucent region are the same translucent region.

Abstract: A curved-surface apparatus for wavelength converting. The apparatus includes: a light source excitation unit comprising a plurality of light source exciters for emitting identical or different excited light, respectively; a wavelength conversion unit provided with annular structure; a plurality of component sets circularly disposed on a curved surface of the annular structure and divided into a plurality of component regions provided with predetermined color wavelength conversion substances; a beam splitter set configured to reflect the excited light emitted by the light source excitation unit and transmit predetermined light; a condenser lens set disposed near the wavelength conversion unit.

Abstract: A bi-directional excitation color wheel includes a first working surface and a second working surface which are of the same size, wherein the first working surface includes a first working ring and a second working ring which are concentric rings; the second working surface includes a third working ring and a fourth working ring which are concentric rings; the first working ring includes a first translucent region and a green fluorescent region, the second working ring includes a second translucent region, the third working ring includes a third translucent region, and the fourth working ring includes a fourth translucent region and a first fluorescent region; the first translucent region and the third translucent region are the same translucent region, and the second translucent region and the fourth translucent region are the same translucent region.

Abstract: A curved-surface apparatus for wavelength conversing. The apparatus includes: a light source excitation unit comprising a plurality of light source exciters for emitting identical or different exciting light, respectively; a wavelength conversion unit provided with annular structure; a plurality of component sets circularly disposed on a curved surface of the annular structure and divided into a plurality of component regions provided with predetermined color wavelength conversion substances; a beam splitter set configured to reflect the exciting light emitted by the light source excitation unit and transmit predetermined light; a condenser lens set disposed near the wavelength conversion unit.