s everybody knows, LCD liquid crystal panel is the most important, and occupied a part of the most expensive.While the LCD color effect is not determined by LCD panel that only a part (display IC chip is very key), but it is a very important part.But most readers are generally see the LCD monitor or LCD TV "after all", up to see is a whole piece of LCD panel, but the structure of the inside is really about?

LCD panel is mainly composed of the following eight parts:


1, the back light (or a backlight module); 

  With liquid crystal molecules itself is not light, so if you want to appear, liquid crystal display need special light source to provide light, then passes through the liquid crystal molecules deflection to produce different colours.The back light is to provide energy.LCD used before are named CCFL cold cathode ray tube, the luminescence principle and fluorescent lamp are almost identical, and now the new liquid crystal display is adopted more energy saving, longevity noodles LED back light.Tubes (or LED) by the light of light guide plate after light distribution, everywhere by the baffle plate on the reverse of the all concentrated light direction toward the liquid crystal molecules.The last light through a prism sheet and the light diffuser distributed evenly, avoid the central high brightness, low brightness around.

2, on the lower two polarization; With liquid crystal molecules itself is not light, so if you want to appear, liquid crystal display need special light source to provide light, then passes through the liquid crystal molecules deflection to produce different colours.The back light is to provide energy.LCD used before are named CCFL cold cathode ray tube, the luminescence principle and fluorescent lamp are almost identical, and now the new liquid crystal display is adopted more energy saving, longevity noodles LED back light.Tubes (or LED) by the light of light guide plate after light distribution, everywhere by the baffle plate on the reverse of the all concentrated light direction toward the liquid crystal molecules.The last light through a prism sheet and the light diffuser distributed evenly, avoid the central high brightness, low brightness around.

2, on the lower two polarization; The role of polaroid is through the light from a single direction.

3, the upper and the lower two pieces of glass substrate;    


Glass is more than two pieces of glass, the inside has a groove structure, and attached to the membrane, can let the liquid crystal molecules along the grooves arranged in rows.Will on both sides of upper and lower two layers of glass with a TFT thin film transistor and color filter.4, ITO transparent conductive layer; 

5, thin film transistor (TFT) is what we often call.    


We often say TFT - LCD, it actually refers to the thin film transistor, its role is similar to the switch, TFT can control IC control circuit voltage signal, and transfer to the liquid crystal molecules, it decided to the liquid crystal molecules deflection Angle size, so it is a very important part. 


6, liquid crystal molecules layer;    
There's no need to explain too much, it is to change the light polarization state is the most important elements, through the power and elastic force jointly determine its arrangement and polarization state. 


Its role is to provide conductive path, divided into pixel electrodes (P) and public electrode (M).On the next page we explain for everybody LCD panel structure more content.


7, color filter;    


Through the liquid crystal molecules deflection of light can only display different grayscale, but cannot provide red, green, blue (RGB) color, while color filter is composed of RGB three filter, through the three mixed drink to adjust the color and brightness.LCD panel in each pixel consists of red, green, blue three points, each of the points of each color has a different grayscale change.

8, box glue;      


Believe everyone can find the function of the parts, it is to make the LCD panel in the upper and lower layer glass can firmly stick together, and the internal system and external "isolation", prevent dust from entering the colour effect.


Described above, of course, the structure is most used by the panel LCD TVS and LCD monitors on the market structure of some special products may use different accessories, but the overall architecture and working principle of the basic won't have too big difference.And we say normally "LED backlight" refers to is it in the first part of the back light of improvement, the CCFL cold cathode ray tube has LED, and the other part there is almost no change (external power supply part will be a corresponding small adjustment).In addition the size of the LCD color gamut, also is mainly determined by light source through the liquid crystal display.