Light guide plate making method for improving color gamut and yield, light guide plate and backlight module

Abstract

The invention provides a light guide plate making method for improving color gamut and yield. The light guide plate making method for improving the color gamut and yield comprises the following steps: firstly, blending yellow fluorescent powder ink; then, according to the range of high color gamut failure zone of the backlight module, plate-making lattice points to be a steel wire net or a polyester net, designing the lattice points from outside to inside and from large to small, coating the blended yellow fluorescent powder ink on the steel wire net or the polyester net, printing on the incident light surface of the light guide plate by a printer, and solidifying the yellow fluorescent powder ink on the light guide plate by a baking oven IR; and then, according to the range of the visual zone of the backlight module, designing the lattice points of dots or lines, and inputting to a laser machine computer, setting the variation tendency of the light energy, and performing the laser dotting to the light guide plate printed with the yellow fluorescent powder ink. The light guide plate making method is capable of improving the color gamut of the backlight module, the optical brightness is not affected, and the product yield is greatly improved.

Description

technical field [0001] The invention relates to the field of backlights, in particular to a method for manufacturing a light guide plate, a light guide plate, and a backlight module. Background technique [0002] At present, the liquid crystal display industry pays more and more attention to bright colors and high brightness, and the reliability requirements are also getting higher and higher. Existing edge-lit TV backlight modules are usually realized by combining blue light and quantum film, such as figure 1 As shown, the backlight module includes: a blue LED 10 arranged on the side, a reflective sheet 6, a light guide plate 5, a refracting blue light 4, a quantum film 3, an enhancement sheet 2 and a diffusion plate 1, and the light guide plate are sequentially arranged from the inside to the outside. 5 Attach the reflective strip 7 on the other three sides except the light strip side, and fix and assemble the above-mentioned modules together through the back plate or the...

AI Technical Summary

Problems solved by technology

[0005] like figure 2 As shown, the dot (or line) method of the laser light guide plate reflects light in different areas by inputting different energy and controlling the depth and length of the dots. This method cannot achieve dots of other colors on the light guide plate to improve the color. area

[0006] like image 3 As shown, the dot method of hot rolling light guide plate is to cover the mold with dots in the visible area, and the raw light guide plate is automatically filled with dots when it is extruded from the sheet. This method also cannot achieve dots with other colors to improve the color gamut

[0007] like image 3 As shown, the dot method of printing light guide plate uses light guide ink to print dots of different diameters to reflect light, and inks of other colors can also be used to print in a certain area to increase the color gamut, but the improvement of the color gamut is due to the decrease in yield and the increase in color gamut. The cost is increased, because the existing process prints yellow phosphor dots around the light guide plate, in order to improve the ability of the light guide plate to reflect light, and then print the dots again, which is equivalent to printing the light guide plate twice, so The light guide plate is easy to be scratched, easy to shift, easy to leak dots during the printing process, easy to dot defects and other problems, the defective rate of production will be doubled, greatly increasing the cost pressure, and the optical index control, printing process control problem analysis, Positioning is difficult to meet the conditions for mass production

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