A projection device and its electric shaft-shifting structure

Abstract

The invention discloses an electric shaft shifting structure, comprising: a casing, a mobile device, at least one sensor and a controller for controlling the action of the mobile device; the mobile device is used to drive the lens assembly along its radial direction or vertical direction or lateral direction moving; the sensor is set at the non-end position of the moving range of the lens assembly; the lens assembly moves and triggers the sensor, so that the sensor generates an electrical signal and transmits it to the controller. The electric shaft shifting structure provided by the present invention can not only adjust the movement distance of the lens assembly by controlling the movement accuracy of the mobile device during the movement of the lens assembly, but also confirm the movement distance of the lens assembly through the setting of the sensor, thereby improving The movement accuracy of the lens assembly is improved, and the movement error of the electric shaft-shifting structure is reduced; and the angle between the axis of the lens assembly and the projection surface is not changed during the movement, so as to avoid picture distortion. The invention also discloses a projection device comprising the electric shaft shifting structure.

Description

technical field [0001] The invention relates to the technical field of projector products, and more specifically, relates to an electric shaft-shifting structure. In addition, the present invention also relates to a projection device comprising the above electric shaft shifting structure. Background technique [0002] In the prior art, the movement of the picture in the projection device is generally achieved by the mechanical structure driving the optical machine to rotate. During the rotation, the optical machine part of the projected picture will have a certain inclination angle, so that the size of the picture will change, thereby Distort the picture, for example: the original rectangular picture will become a trapezoidal picture after the optical machine is rotated, affecting the imaging effect; and in the prior art, the distance of the axis shift is controlled only by the mechanical structure, and the error is relatively large. [0003] To sum up, how to provide an el...

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Problems solved by technology

[0002] In the prior art, the movement of the picture in the projection device is generally achieved by the mechanical structure driving the optical machine to rotate. During the rotation, the optical machine part of the projected picture will have a certain inclination angle, so that the size of the picture will change, thereby Distort the picture, for example: the original rectangular picture will become a trapezoidal picture after the optical machine is rotated, which affects the imaging effect; and in the prior art, the distance of the axis shift is controlled only by the mechanical structure, and the error is large

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