Light equalizing method and device for LCD (liquid crystal display) three-dimensional printing

Abstract

The invention discloses an LCD three-dimensional printing light equalizing method. The method comprises the following steps: acquiring an initial gray value of a pixel where a first array point coordinate is located under a whiteboard image; obtaining a uniform light compensation difference value corresponding to the initial gray value, interpolating the uniform light compensation difference value into a full-screen compensation difference value by using an interpolation compensation algorithm, and compensating the full-screen compensation difference value to an equal gray value to obtain a full-screen uniform light gray value; obtaining a gray average value of pixels in a central grid where a second matrix point coordinate central matrix point is located under the full-screen uniform light gray value image as a reference gray value; obtaining an average gray value of pixels in a non-central grid where the non-central matrix point is located, and obtaining an optimized compensation difference value between the average gray value and the reference gray value; interpolating the optimization compensation difference value into a full-screen optimization compensation difference value of each pixel of a full screen by using an interpolation compensation algorithm, and compensating the full-screen optimization compensation difference value to the full-screen compensation difference value to obtain a target gray compensation value; and compensating the target gray compensation value to the to-be-printed image data, and loading the to-be-printed image data into an LCD screen for photocuring printing.

Description

technical field [0001] The present application relates to the technical field of 3D printing, and in particular, to a method and device for light equalization of LCD 3D printing. Background technique [0002] At present, light-curing 3D printers usually use a single light source or a matrix light source. Due to the service life of the lamp bead itself, manufacturing errors, the manufacturing precision limitations of optical devices and the difference in the energy value loss of the LCD path, the exposure is uneven and the quality of the LCD light curing printer during model printing is affected. [0003] For example, the background technology of the invention patent number 202010781266X "An LCD light-curing 3D printing uniform light optimization compensation device and method" and the invention patent number 2020116196154 "A light-curing 3D printer light compensation method" have been applied for publication; the former uses Ultraviolet light testing instrument performs ave...

AI Technical Summary

Problems solved by technology

[0006] The two-stage light equalization method of the present application can not only overcome the problem of inaccurate pixel grayscale collection caused by the deviation between the shooting coordinates and the actual coordinates caused by the optical distortion of the shooting unit, but also overcome the problem that the edge image due to the The collection light intensity and grayscale weakening problem caused by the tilt of the collection angle; through two stages of compensation and optimization, the problem of poor light uniformity in the LCD 3D printing process can be solved as best as possible

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