Backlight adjustment structure and display device
A backlight adjustment and display device technology, which is applied in light guides, optics, optical components, etc., can solve the problems of anti-peeping display devices such as thick size, easy to confuse, and low pixel density, and achieve the goal of avoiding small pixel density and thinning thickness Effect
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[0074] Assuming that the refractive index of the waveguide plate 1 is n1=1.52, the height of the focal point is f=30um, and the transmission angle of light in the waveguide plate θ1=65°, according to the above calculation formula, the convergence angle can be calculated from θ-~θ+ corresponding to the grating cycle parameters, such as Figure 16 shown.
[0075] Such as Figure 17-Figure 19 Shown is the simulation result based on the above design method. When the light in the waveguide plate 1 is transmitted forward, the gradient grating structure 3 above the waveguide plate 1 presents a converging light-taking mode ( Figure 17 , Figure 18 ), at this time, the imaging anti-peeping display mode; when the light in the waveguide plate 1 is reversely transmitted, the gradient grating structure 3 above the waveguide plate 1 is imaged in a scattering light-taking mode ( Figure 19 ), the display mode is shared. The duty cycle of the gradient grating structure 3 with variable p...
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