Light diffusion structure and light diffusion sheet
A technology of light diffusion and cylindrical microlens, applied in optics, optical components, instruments, etc., can solve the problems of uneven light diffusion and uneven display brightness, and achieve the effect of improving the uniform display brightness and improving the display brightness uniform effect.
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Embodiment 1
[0046] refer to figure 2 The schematic diagram of the light diffusion structure of the embodiment of the present invention is shown. A light diffusion structure includes two layers of microlens layers, respectively microlens layer I1011 and microlens layer II1012. The height of the marked columnar microlens is T, and the height of the columnar microlens is T. The width of the lens is P, and the aspect ratio of the columnar microlens is the ratio of the height of the columnar microlens to the width of the columnar microlens, that is, the aspect ratio of the columnar microlens=T / P. in:
[0047] The microlens layer I1011 includes a plurality of columnar microlenses arranged vertically. Taking the central axis Z as the reference, the aspect ratio of the columnar microlenses arranged along the lateral direction of the light diffusion structure toward both ends gradually decreases, and the central axis Z is The symmetry axis of the columnar microlens with the maximum aspect ratio ...
Embodiment 2
[0070] Figure 9 It is a schematic diagram of the test of the light diffusion ability of the light diffusion structure of the embodiment of the present invention. Take a rectangular light-diffusing structure sample as sample 1, and the light-diffusing structure here is selected from the light-diffusing structure composed of arc-shaped cylindrical microlenses in Embodiment 1. Take 9 test points from sample 1, namely ①, ②, ③, ④, ⑤, ⑥, ⑦, ⑧, ⑨. ①, ② and ③ are on the same horizontal line, ④, ⑤ and ⑥ are on the same horizontal line, ⑦, ⑧, ⑨ are on the same horizontal line, centered on the central axis Z, among which ①, ④, ⑦ and ③, ⑥, ⑨ The distance between the positions of the six test points and the line segment at the most edge is 1 / 6 of the length of the corresponding side, ②, ⑤, ⑧ are located on the central axis Z, and ⑤ is located in the center of the entire sample 1. The specific test method is: use the obliquely incident light source Y to project light onto sample 1, the l...
Embodiment 3
[0077] Such as Figure 11 Shown is a schematic cross-sectional view of a light diffusing structure containing diffusing particles. The light diffusion structure includes a microlens layer I1011 and a microlens layer II1012. The microlens layer I1011 includes a number of vertically arranged columnar microlenses, and the microlens layer II1012 includes a number of horizontally arranged columnar microlenses. The microlens layer I1011 and the microlens layer Diffusion particles 102 are arranged in the columnar microlens of II1012, and the diffusion particles 102 can uniformly scatter the light passing through the columnar microlens, further making the distribution of light intensity more uniform. Diffusion particles include but are not limited to silicon dioxide particles, aluminum oxide particles, titanium oxide particles, cerium oxide particles, zirconium oxide particles, tantalum oxide particles, zinc oxide particles, magnesium fluoride particles, etc., and their particle diame...
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