Wavelength conversion device and projector

Abstract

The invention provides a wavelength conversion device and a projector. The wavelength conversion device is used for receiving an excitation light beam and comprises a substrate, at least one wavelength conversion material layer, a driving unit and an assembly part. The substrate is provided with a first area and a second area which are adjacently arranged. The wavelength conversion material layeris arranged on the substrate, is located in the first region and is used for converting the wavelength of the excitation light beam. The drive unit comprises a rotating shaft, and the driving unit isconnected with the substrate and used for driving the substrate to rotate with the rotating shaft as the axis. The assembly part is arranged on the substrate, and the substrate drives the assembly part to rotate. The thickness or the shape of the assembly part is asymmetric in the radial direction. According to the wavelength conversion device and the projector, noise generated by structural vibration can be effectively reduced.

Description

technical field [0001] The present invention relates to an optical device and a projector, and in particular to a wavelength conversion device and a projector with the wavelength conversion device. Background technique [0002] In current laser projectors, a reflective layer is generally formed on a metal substrate by coating, and a phosphor layer is coated on the reflective layer to form a phosphor wheel. Then, the phosphor layer on the metal substrate of the phosphor wheel is excited by the laser beam emitted by the laser light source device to generate beams of different colors (such as green light and yellow light). At this time, the laser beam (such as blue light) can also be directly passed through the fluorescent wheel through the hollow groove on the metal substrate or the light-transmitting plate arranged on the metal substrate, so as to generate various colors of light. [0003] In order to improve the structural balance effect of the phosphor wheel, some projecto...

AI Technical Summary

Problems solved by technology

Due to the asymmetric shape of the balance plate, resistance and wind shear will be generated during high-speed rotation, which will affect the vibration and noise of the phosphor wheel in the optical machine

In addition, after the balance piece is added, the center of gravity of the load at the front end of the entire driver will shift forward (that is, away from the driver), which will cause unbalanced and heavy loads on the rotating bearing of the driver. In addition to affecting the life of the driver, it will also affect the When the driver rotates, it generates a large vibration, which causes a large noise in the optical mechanism

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