Dual-channel objective lens focus light guide plate lattice point beam splitting laser processing device, system and method

Abstract

The invention discloses a laser processing device, system and method for beam-splitting dots of a light guide plate with a dual-channel objective lens, comprising a transverse bridge, a linear motor, a laser head fast focusing device and a laser processing head; , the stator of the linear motor is fixedly installed in the middle of the transverse bridge; the two transverse guide rails are provided with a transverse slider, which is connected to the east part of the linear motor, and the DC motor drives the transverse slider along the transverse The guide rail moves back and forth; the focus position of the laser beam is adjusted by the laser head fast focusing device, and the laser beam is focused on the dot surface of the light guide plate by the laser processing head to process the dots. In the present invention, two beam channels are set in the cavity of the laser head, and the beam-splitting laser beam is transmitted through two beam channels, and the laser beam is separately focused through two focusing objective lenses, so that the energy of the laser beam can be effectively utilized, and the focusing effect will be improved. more obvious.

Description

technical field [0001] The invention belongs to the field of laser processing, and relates to the field of laser processing of a light guide plate of a backlight module, in particular to a dual-channel objective lens focusing light guide plate dot beam splitting laser processing device, system and method. Background technique [0002] The role of the light guide plate is to guide the scattering direction of light to improve the brightness and control the uniformity of the brightness. Therefore, the design and manufacture of the light guide plate is one of the key technologies of the backlight module. The size and density of the scattering dots in the light guide plate determine the brightness and uniformity of the output light. [0003] At present, the manufacturing methods of light guide plate scattering dots include mold forming method, ink printing method and laser processing method. Laser processing is a non-contact processing method, which has the advantages of high en...

AI Technical Summary

Problems solved by technology

With the continuous advancement of science and technology, industrial high-power lasers continue to develop, and the power of lasers continues to increase, which brings about the problem that the laser utilization rate of traditional single-beam single-focus laser processing heads is too low

Traditional laser processing mainly uses single-beam laser focusing or the same focusing objective lens to focus the split beams separately for material processing. Since the energy of the beam emitted by the laser is too large, it is often necessary to use attenuation devices to attenuate the laser power. Therefore, a single beam The energy utilization rate in the laser focusing process is not high; and the single-channel, single-objective double-focusing method is likely to cause beam interference, and the laser beam cannot be focused at the center of the lens, which will also cause insufficient laser energy utilization and fail to achieve The purpose of simultaneous processing of two rows of dots with different sizes and depths

[0004] To sum up, the single-channel, single-objective double-focusing method in the prior art cannot simultaneously process two rows of dots with different sizes and depths, and there is still no effective solution.

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