A design method for dot distribution on the bottom surface of a side-entry light guide plate

Abstract

The invention relates to a design method for the bottom surface lattice point distribution of an edge-lighting light guide plate. The method includes the following steps that: light guide plate parameters and LED parameters are set; the illuminance of point light sources relative the bottom of the light guide plate is calculated; the illuminance of linear light sources relative the bottom of the light guide plate is calculated by means of integral computation according to the illuminance of the point light sources relative the bottom of the light guide plate, and the illuminance of linear optical stick light sources relative to the bottom of the light guide plate is obtained by means of fitting according to the condition of total reflection; and the illuminance of a single area light source relative to the bottom of the light guide plate is calculated by means of integral computation according to the illuminance of the linear light sources relative the bottom of the light guide plate;and the illuminance of n area light sources relative to the bottom of the light guide plate is calculated, and the radius of a point at any coordinate position is obtained according to the illuminanceof the n area light sources relative to the bottom of the light guide plate on the basis of the law of conservation of energy. With the design method of the invention adopted, the illuminance value of a certain point at the bottom of the light guide plate can be calculated accurately and efficiently according to the given LED parameters and the parameters of the light guide plate, and the point layout of uniform lighting light emission can be calculated.

Description

technical field [0001] The invention relates to the field of light plate scattering dots, in particular to a method for designing the distribution of dots on the bottom surface of a side-entry light guide plate. Background technique [0002] In recent years, liquid crystal display technology has gradually replaced the traditional cathode ray tube display technology due to its light and thin product volume, small footprint, and low radiation, and has occupied the mainstream of flat panel display products. A liquid crystal display (LCD) is not an active light-emitting display device, and needs a backlight module to provide illumination for it to display images. The function of the backlight module is to pass the light emitted by the point light source or the line light source through the light guide plate (LGP) to form the surface light source required by the liquid crystal display, which determines the light efficiency, uniformity and color characteristics of the liquid cryst...

AI Technical Summary

Problems solved by technology

At present, the existing public methods are to approximate the extended LED light source as a point light source and perform simplified calculations, but this approximation actually has a greater impact on the overall effect

In order to finally obtain better design results, many light guide plate dot layout designs still rely on experience, which leads to low design efficiency and large differences in human interference

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