Projection pattern correction device, method and system of a projection system

Abstract

The invention discloses a projection pattern correction device, method and system of a projection system, comprising a first distance measuring sensor and a second distance measuring sensor arranged on the front control panel of the projector, an inertial measurement unit arranged on the projector, and The processor connected to the output terminals of the first ranging sensor, the second ranging sensor and the inertial measurement unit, the connection line between the first ranging sensor and the second ranging sensor is not perpendicular to the horizontal line. The present invention pre-establishes the relative position information between the projector and the screen and the corresponding relationship table between the projection screen size. When correcting the projection screen of the projector, the processor uses the first distance measuring sensor, the second distance measuring The first distance, the second distance, and the included angle respectively obtained by the sensor and the inertial measurement unit and the pre-established correspondence table match the corresponding target projection screen size, so as to correct the projection screen of the projector to a rectangular screen according to the projection screen size, The structure design is simple and the cost is low.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of projection equipment, and in particular, to a projection pattern correction device, method, and system for a projection system. Background technique [0002] In the daily use of the projector, the position of the projector should be at right angles to the projection screen to ensure the projection effect. If the perpendicularity of the two cannot be guaranteed, the projection screen will produce a trapezoid. In this case, users need to use the "keystone correction function" on the projector to correct the trapezoid, so as to ensure that the picture becomes a standard rectangle. [0003] The projector usually has a certain pitch angle in the vertical direction during use, so that the projection screen will produce trapezoidal deformation in the vertical direction. The current projectors have the vertical keystone correction function, usually using optical keystone correction and digit...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, the projector also has a trapezoid due to the offset of the horizontal position. In the prior art, the projection pattern is usually photographed by a camera, and then the trapezoid in the horizontal direction is corrected after analyzing the pattern. The design is complex, the cost is high, and the processing power of the CPU is also required

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