Six-degree-of-freedom Lorentz platform for detecting and repairing LED display screen

Abstract

The invention discloses a six-degree-of-freedom Lorentz platform for detecting and repairing an LED display screen, the six-degree-of-freedom Lorentz platform is composed of a rotor system and a stator system, and the rotor system mainly comprises a table top, a photoelectric coded disc rotor assembly, an outer rotor assembly and an inner rotor assembly; the stator system mainly comprises a photoelectric coded disc stator assembly, a supporting seat, an axial translation and radial deflection Lorentz magnetic bearing stator assembly, a radial translation and axial rotation Lorentz magnetic bearing stator assembly, an axial displacement sensor framework, an axial displacement sensor, a radial displacement sensor and a universal ball protection bearing. According to the invention, the axial translation radial deflection Lorentz magnetic bearing and the radial translation axial rotation Lorentz magnetic bearing are adopted to realize six-degree-of-freedom high-precision rapid motion positioning suspension driving control of the platform, and the motion positioning precision, the dynamic response speed and the control bandwidth of the platform are improved while the azimuth adjustment capability of the platform is improved.

Description

technical field [0001] The invention relates to a display chip motion platform, in particular to a six-degree-of-freedom Lorentz platform for LED display detection and repair, especially a high motion positioning accuracy, high dynamic response speed, high control bandwidth capability and 360° ° The six-degree-of-freedom Lorentz suspension fast motion positioning platform with the ability to adjust the azimuth angle is especially suitable for repairing dead pixels of Mini / Micro LED display LED chips. Background technique [0002] A display chip is a chip with a display function. The display screen prepared by it is an extension of human vision and an important part of a new generation of automated intelligent equipment. The display screen integrated with Mini / Micro LED chips with a size of tens of microns has the advantages of ultra-high resolution, high brightness, ultra-power saving, no splicing gap, and fast response. It is a new and dynamic display technology after LCD a...

AI Technical Summary

Problems solved by technology

In view of the fact that the Lorentz magnetic bearing has a linear relationship between the force and the current and has no displacement stiffness, the positioning accuracy, dynamic response speed and control bandwidth of the platform have been greatly improved, but its azimuth travel is less than 0.5°, and the azimuth adjustment ability is insufficient

A six-degree-of-freedom magnetic levitation turntable, control system and method described in the authorized patent 201911327508.1 uses a combination of a circular Halbach magnet array and a coreless circular coil array to realize five-degree-of-freedom levitation and 360° azimuth drive of the platform , the azimuth adjustment ability is strong, but its levitation driving force is magnetic resistance, which restricts the improvement of platform motion positioning accuracy, dynamic response speed and control bandwidth

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