Liquid crystal is a kind of special substance between solid and liquid, organic compound is a kind of common liquid, molecular arrangement is very regular and solid crystal, so liquid crystal is another kind of special substance.If the LCD can change its molecular arrangement and give it polarized light, it will stop the light through its action (light can pass through smoothly without using the field).LCD voltage size, how much light can change the color.You can also visually change the voltage
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