The design principle of the light guide plate is derived from the notebook LCD screen, combined with spectral analysis and laser engraving or digital printing technology, with ultra-thin and ultra-bright, uniform light guide, energy saving and environmental protection, no dark area, easy installation and maintenance. The maximum width is 1500mm, the maximum length is 3000mm, and the thinnest thickness is only 2mm. However, the larger the size, in order to ensure brightness, the thickness needs to be increased, the light guiding effect is relatively poor, the maximum thickness is not more than 20mm.
The light guide plate presses propylene into a smooth surface plate by injection molding method, and prints round or square diffusion points on the bottom surface of the acrylic plate with a high-reflectivity and non-absorbent material to diffuse light. When the light is emitted to the diffusion point, the light is reflected in all directions and then emitted from the front of the light guide plate. In order to achieve uniform luminescence, diffusion points of varying sizes are used to ensure that the probability of light reflecting in all directions is roughly the same. The reflector plate is used to reflect the light exposed on the bottom back to the light guide plate to improve the light utilization rate and increase the brightness. Although there are differences in the production process of different light guides, they are all based on the principle of light reflection and light scattering.
Regarding the choice of the most cost-effective light guide plate, the brightness of the printing and engraving plates can meet the needs of advertisers. The printed plate uses the refraction and reflection of light and has high reflection characteristics, while the carved plate groove or concave lattice only has a refraction effect. In order to achieve the same brightness as the printed board, the engraving board needs more high-quality materials and processes. In addition, the engraving plate production process is complex, the production efficiency is low, and the cost is relatively high. Therefore, comprehensive consideration, the printing board is the most cost-effective.
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