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This article mainly explains "what is the working principle of LCD". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the working principle of LCD"?

1. The working principle of TN type: TN type is the most basic display technology in LCD display equipment. Its image display principle is that the liquid crystal material is placed between two transparent conductive glasses attached to the polarizer, and the liquid crystal molecules are rotated sequentially according to the fine groove direction of the alignment film. Among them, the end of the electric field is formed, which causes the light to enter smoothly from the polarizer, and then emit from the other side according to the direction in which the molecule rotates. However, if there is an electric field between two pieces of conductive glass after electrification, it will affect the arrangement of its liquid crystal molecules and cause the molecular rods to twist, so that the light can not penetrate, and then cover the light source, so that the contrast change of visual optics is obtained, which is called twisting nematic field effect (twistednematicfieldeffect), also referred to as TNFE. Therefore, the LCD displays used in this type of display equipment are basically made by using the working effect principle of this twisted nematic field, and this principle is relatively simple.

Second, the working principle of LCD: among them, the TFT display technology of TFT is the most complex, which mainly consists of light guide plate, polarizer, filter plate, glass substrate, fluorescent tube, liquid crystal material, alignment film, thin film transistor and so on. First, the backlight is used, and then the light source is projected through the fluorescent tube, and these light sources pass through a polarized light source and then pass through the liquid crystal, and the arrangement of the liquid crystal molecules can change the light angle that penetrates the liquid crystal. Then, these rays pass through the front color filter film and another polarizer, so that the final light intensity and color can be controlled by changing the voltage value of the stimulating liquid crystal, so that it can display a color video picture on the liquid crystal panel.

Third, the working principle of STN type: because of the relationship between the liquid crystal material and the interference of light, the tone of STN display is mainly barrel color and light green. And the working principle is to add a color filter (colorfilter) to the monochromatic STN liquid crystal display, and divide any pixel ((pixrl)) in the monochromatic display matrix into three sub-pixels (sub-pixel), and pass through the color filter to display the three primary colors of red, green and blue, and then harmonize the three primary colors according to their proportion, the display screen in full color mode can be displayed. And the display technology of STN also overcomes the poor display effect of other display technologies due to the enlargement of the screen, which leads to the poor display of screen contrast. After the improved STN technology, even if the picture is enlarged infinitely, it will not affect the display effect and can get a larger screen display with higher contrast.

Thank you for your reading, the above is the content of "what is the working principle of LCD". After the study of this article, I believe you have a deeper understanding of what the working principle of LCD is, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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