Optical fiber scanner, display module and projection display equipment

Abstract

The invention discloses an optical fiber scanner, a display module and projection display equipment, and the optical fiber scanner comprises a housing, a base arranged at one end of the housing, an actuator fixed on the base, an optical fiber fixed on the actuator, a feedback coil, a magnetic field generation unit, and a processor. The actuator comprises a first actuating part and a second actuating part which are sequentially connected in a direction from back to front, and the feedback coil is arranged on the actuator; the magnetic field generation unit is arranged on the inner side of the housing and corresponds to the feedback coil; when the actuator vibrates, an electromagnetic induction current can be generated in the feedback coil; and the processor is used for adjusting the first driving signal according to the electromagnetic induction current. The scheme is used for monitoring the motion trail in the optical fiber scanning imaging system in real time and providing a trail feedback signal for compensation control, so that the technical problem of projection quality degradation is solved.

Description

[0001] This application claims the priority of the Chinese patent application 201910791339.0 entitled "A Fiber Scanner, Display Module and Projection Display Device" filed on August 26, 2019, the entire contents of which are incorporated herein by reference. technical field [0002] The invention relates to the field of projection display, in particular to an optical fiber scanner, a display module and projection display equipment. Background technique [0003] The imaging principle of optical fiber scanning projection technology is to drive the scanning optical fiber through the optical fiber scanner to move the predetermined two-dimensional scanning trajectory, and modulate the light output of the light source, that is, modulate the light corresponding to each pixel of the image to be displayed, and then, through the scanning optical fiber The light corresponding to each pixel of the image to be displayed is projected onto the projection screen one by one, thereby forming a...

AI Technical Summary

Problems solved by technology

[0004] In actual work, fiber optic scanners are easily affected by factors such as temperature, humidity, disturbance vibration, driving fluctuations, aging fatigue, nonlinearity and other factors in the environment, making the actual motion track and state of the fiber scanner deviate from the ideal mode, so that Projection quality degradation during time work

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