The principle and characteristics of astigmatism of LCD light guide plate

The design principle of the light guide plate is derived from the LCD display of the laptop computer, which is a high-tech product that converts the line light source into the surface light source. Optical grade acrylic (PMMA)/PC as the substrate, the use of LCD display and laptop backlight module technology, through the high light line conductivity of the guide point, through the computer to calculate the guide point, the light guide plate light refraction into the surface light source uniform light state manufacturing. The product uses the principle of spectral analysis combined with digital UV printing technology and is made under constant temperature, constant humidity and dust-free environmental conditions.

With the distinctive characteristics of ultra-thin, ultra-bright, uniform light guide, energy saving, environmental protection, no dark area, durable, not easy to yellow, easy installation and maintenance, the light guide plate is the use of injection molding method to press propylene into a smooth surface plate, and then on the acrylic plate with high reflectivity and non-absorbent materials, on the bottom of the plate with screen printing on the circular or square diffusion point. To spread the light. When the light reaches the diffusion point, the light will be reflected in all directions, and then destroy the reflection condition by the front of the light guide plate.

In order to make uniform light, it is necessary to use a variety of dense and different sizes of diffusion points (dense and different sizes to ensure that the probability of light reflection in all directions is roughly the same). The purpose of the reflective plate in the light guide plate is to reflect the light exposed on the bottom back to the light guide plate, in order to improve the use of light and increase the brightness. Although the production process of various light guides is different at present, they all use the principle of light reflection and light scattering.

Production characteristics of light guide plate:

Refractive index: the ratio of refractive index of the two media is called the relative refractive index, and the refractive index of air is often taken as 1 in engineering optics, and the refractive index of other media is the relative refractive index of air;

Optical waveguide: the phenomenon of total reflection of optical electromagnetic wave causes the light wave to propagate in the waveguide and its surrounding limited area;

Incident Angle: when light is emitted to the interface of two media, the Angle between the incident light and the interface normal;

Reflection Angle: When light is reflected to the interface, the Angle between the reflected light and the interface normal;

Dispersion: The phenomenon that the refractive index of colorless transparent objects increases with the decrease of the wavelength of light is called dispersion;

Ultraviolet: The function of blocking ultraviolet light through a flat transparent body due to a change in refractive index