The LCD display method mainly relies on electric current to stimulate the liquid crystal molecules, and realizes the display of images by controlling the refraction and filtering of light. Specifically:
Basic working principle: Liquid crystal display (LCD) consists of color or black and white pixels, which are placed in front of a light source or a reflective surface. When the current passes through the liquid crystal material, it stimulates the liquid crystal molecules to produce a combination of points, lines, and surfaces, which cooperate with the back light tube to finally form a visible picture.
Electric field effect: In LCD, when the electrode generates an electric field, the liquid crystal molecules will be distorted, causing the light passing through them to be refracted regularly. This refraction is filtered by the second filter layer and the image is displayed on the screen. For color LCD displays, each pixel is usually composed of three liquid crystal cells, and each cell has a red, green or blue filter in front of it to achieve color display.
Display mode: There are two basic types of LCD displays: positive LCD and negative LCD. Positive LCD is transparent when the pixel is "OFF" and opaque when the pixel is "ON"; negative LCD is the opposite, opaque when the pixel is "OFF" and transparent when the pixel is "ON". These different operating modes are suitable for different ambient light conditions, such as positive LCD is usually used in places with strong ambient light, while negative LCD performs better when the ambient light is dim.