How LCD TVs work

The liquid crystal panel is a basic component of Liquid Crystal Materials. Because the liquid crystal is between the solid state and the liquid state, it not only has the optical properties of the solid state crystal, but also has the liquid flow characteristics. When the power is on, the liquid crystal is arranged in an orderly manner, making the light easy to pass. when the power is off, the arrangement is disordered to prevent the light from passing through.

The liquid crystal panel contains two pieces of exquisite sodium-free glass material with a layer of liquid crystal in the middle. When the beam passes through this layer of liquid crystal, the liquid crystal itself will be arranged to stand or twist in irregular shape, this blocks or allows the beam to pass smoothly. Most liquid crystals are organic complexes consisting of Long Rod molecules. Naturally, the long axes of these rod-like molecules are roughly parallel. The liquid crystal is poured into a well-processed slotted plane, and the liquid crystal molecules are arranged along the slot. Therefore, if the slots are very parallel, the molecules are completely parallel.

Polarization filter blocks light

The LCD is composed of two vertical polarization filters, so in normal cases, all the light that tries to penetrate should be blocked. However, because the two filters are filled with distorted liquid crystal, after the light passes through the first filter, the liquid crystal molecules will reverse 90 degrees, and finally wear out from the second filter. On the other hand, if a voltage is added to the liquid crystal, the molecules will be re-arranged and completely parallel, so that the light will not be reversed, so it is blocked by the second filter. In short, power-on will block the light, without power-on will make the light shot. Therefore, liquid crystal molecules will not consume energy during television use, and the added voltage will be used. However, this is not the main aspect of energy consumption of Liquid Crystal TVs, but the backlight.

The liquid crystal itself does not produce color and light, so where does the image on the LCD screen come from? In fact, the LCD panel is a passive display, and it cannot emit light itself. It can only display images through illumination of the light source. At present, most LCD TVs use cold cathode fluorescent tubes as backlight light sources. The cold cathode fluorescent tube is filled with inert gas and trace mercury, and is coated with phosphor on the inner wall of the glass tube. When the voltage is increased to the electrodes at both ends of the tube, the polarization begins to discharge, mercury will be activated because of the collision of electrons or the atoms of the filled inert gas. ultraviolet rays then activate the phosphor. After Long-term improvement, the current cold cathode fluorescent tube technology has been very mature, its long service life, excellent performance in brightness, power-saving and other aspects. The cold cathode fluorescent tube is a tubular light source. In order to make the brightness of different areas of the screen even, a large number of accessories are required.

Working principle of TFT LCD TV

LCD images rely on the tubes on the back of the flat board to form images through the flat board. brightness has always been a major problem for LCD TVs. There are two ways to increase brightness: the first is to improve the light passing rate of the cutting board, but there is a limit. Second, the technology of multiple tubes is adopted, and the brightness is greatly improved. The LCD brightness is better under the same parameters. However, another problem has emerged. More cold cathode fluorescent tubes mean higher power consumption. In particular, large screen LCD TVs usually require dozens of cold cathode fluorescent tubes, which will inevitably increase power. 21 inch LCD TV power is about 40 W, 30 inch is about W, the larger the size, the higher the power consumption

The liquid crystal panel is a basic component of Liquid Crystal Materials. Because the liquid crystal is between the solid state and the liquid state, it not only has the optical properties of the solid state crystal, but also has the liquid flow characteristics. When the power is on, the liquid crystal is arranged in an orderly manner, making the light easy to pass. when the power is off, the arrangement is disordered to prevent the light from passing through.

The liquid crystal panel contains two pieces of exquisite sodium-free glass material with a layer of liquid crystal in the middle. When the beam passes through this layer of liquid crystal, the liquid crystal itself will be arranged to stand or twist in irregular shape, this blocks or allows the beam to pass smoothly. Most liquid crystals are organic complexes consisting of Long Rod molecules. Naturally, the long axes of these rod-like molecules are roughly parallel. The liquid crystal is poured into a well-processed slotted plane, and the liquid crystal molecules are arranged along the slot. Therefore, if the slots are very parallel, the molecules are completely parallel.

Polarization filter blocks light

The LCD is composed of two vertical polarization filters, so in normal cases, all the light that tries to penetrate should be blocked. However, because the two filters are filled with distorted liquid crystal, after the light passes through the first filter, the liquid crystal molecules will reverse 90 degrees, and finally wear out from the second filter. On the other hand, if a voltage is added to the liquid crystal, the molecules will be re-arranged and completely parallel, so that the light will not be reversed, so it is blocked by the second filter. In short, power-on will block the light, without power-on will make the light shot. Therefore, liquid crystal molecules will not consume energy during television use, and the added voltage will be used. However, this is not the main aspect of energy consumption of Liquid Crystal TVs, but the backlight.

The liquid crystal itself does not produce color and light, so where does the image on the LCD screen come from? In fact, the LCD panel is a passive display, and it cannot emit light itself. It can only display images through illumination of the light source. At present, most LCD TVs use cold cathode fluorescent tubes as backlight light sources. The cold cathode fluorescent tube is filled with inert gas and trace mercury, and is coated with phosphor on the inner wall of the glass tube. When the voltage is increased to the electrodes at both ends of the tube, the polarization begins to discharge, mercury will be activated because of the collision of electrons or the atoms of the filled inert gas. ultraviolet rays then activate the phosphor. After Long-term improvement, the current cold cathode fluorescent tube technology has been very mature, its long service life, excellent performance in brightness, power-saving and other aspects. The cold cathode fluorescent tube is a tubular light source. In order to make the brightness of different areas of the screen even, a large number of accessories are required.

Working principle of TFT LCD TV

LCD images rely on the tubes on the back of the flat board to form images through the flat board. brightness has always been a major problem for LCD TVs. There are two ways to increase brightness: the first is to improve the light passing rate of the cutting board, but there is a limit. Second, the technology of multiple tubes is adopted, and the brightness is greatly improved. The LCD brightness is better under the same parameters. However, another problem has emerged. More cold cathode fluorescent tubes mean higher power consumption. In particular, large screen LCD TVs usually require dozens of cold cathode fluorescent tubes, which will inevitably increase power. The power of 21 inch LCD TVs is about 40 W, and that of 30 inch is about w.