LCD module in short screen + backlight headlamp unit. LCD modules, LCD TV display unit is in the position of the CRT tube. Other part includes power circuit, the signal processing circuit, etc., of course, shell, etc. Module mainly divided into the screen and a backlight headlamp unit. Two parts are assembled together, but the work is independent of each other (that is, the circuit is not relevant).
The principle of liquid crystal display is backlit chy-tech uniform plane light, and light eyes reached us through the LCD screen. The role of the screen is according to the pixel to deal with the light, to display the image. Two parts contain a large number of parts, here did not elaborate. The current technology is the best sharp, followed by samsung, SONY. (the company's official website: http://m.hub-evs.com/Cn/Index-215737.html)
The display technology is to a high-definition, low electromagnetic radiation, low consumption and development direction, such as small volume today. Although, CRT (cathode ray tube) display production technology is more and more mature
, the picture of the display quality is getting better and better, but its size and the radiation problem is still inevitable by its physical properties. Therefore, LCD monitor with its small volume, heavy
Characteristics such as lightweight, no radiation, quicken the steps of the alternatives to traditional CRT monitor, known by many as the CRT, the terminator. Let's talk about the working principle of LCD display.
LCD module is the main material in the liquid crystal, it is a regular arrangement of organic compounds, is a kind of between solid and liquid substances, generally USES is points at present
Child to arrange the most suitable for used in the manufacture of liquid crystal display nematic fine columnar crystal. The physical properties of liquid crystal is: when the electric conduction, molecules are arranged orderly, make the light easy through;
No energized the molecular arrangement disorder, prevent light through. Let the liquid crystal molecules as gate block or allow light penetration. Most LCD belong to organic composite material, by the long rod molecules
Composition. Under the natural state, the parallel to the long axis roughly rod-shaped molecules. To pass through the fine processing of liquid crystal pour into a slotted plane, the liquid crystal molecules will line up along the groove, so if those
Slot is parallel, each molecule is completely parallel. Technically, in a nutshell, the LCD panel contains two quite delicate without sodium glass material, known as the Substrates, in the middle
With a layer of liquid crystal. When the beam through the layer of liquid crystal, liquid crystal itself can stand in rows or reverse the irregular shape and thus cut off or make light beam pass. (the company's official website: http://m.hub-evs.com/Cn/Index-215737.html)
From the perspective of the structure of liquid crystal display, either a laptop or desktop systems, using the LCD display is made up of different parts of layered structure. The LCD by two pieces of glass
, about 1 mm thick, by 5 microns of containing liquid crystal material evenly spaced. Because liquid crystal material itself does not shine, so on both sides of the display lamp as the light source
, and on the back of LCD screen has a back plate (or well plate) and the reflective film, back plate is composed of a fluorescent substance can shoot the light, the main role is to provide uniform background
The light source. Back plate light after through the first layer polarization filtering into contains thousands of liquid crystal droplets of liquid crystal layer. The droplets of liquid crystal layer were included in a tiny cell
Structure, one or more cells constitute a pixel on the screen. Between the glass and liquid crystal material is the transparent electrode, the electrode was divided into rows and columns, rows and columns of intersections,
By changing the voltage and the change of liquid crystal optical, liquid crystal material similar to the effect of small light valve. In the surrounding liquid crystal material is control circuit and driver circuit part. when
The electrode in the LCD that produce electric field, the liquid crystal molecules will generate distortion, which will be through the light of the rules, and then after the second filter layer of filter on the screen
Displayed.
Liquid crystal display technology also has weakness and the technical bottleneck, compared with CRT display brightness, uniformity, and reaction time on the visual Angle is obvious gap. The reaction
Time and visual Angle depends on the quality of the LCD panel, image uniformity and auxiliary optical module has a lot to do. And the brightness of the LCD mainly depends on backlight source. (the company's official website: http://m.hub-evs.com/Cn/Index-215737.html)
For liquid crystal displays, brightness is often related to his back on the light. Back the brighter the light source, the changes in plants could also improve the brightness of LCD. But in the early days of the liquid crystal display
In, because only use two cold light lamp, tend to cause the phenomenon such as uneven brightness, brightness also disappointing. Until then use four cold light lamp products
, just had a big improvement.
Signal response time, that is, the LCD liquid crystal display unit response delay. Is actually refers to the liquid crystal cell from a state of molecules arranged into another state of molecular arrangement
The time required to response time, a little better, it reflects the LCD monitor the speed of response to an input signal at each pixel point, namely the pixel by light or dark change from light to dark. (the company's website: http://m.hub-evs.com/Cn/Index-215737.html) response
The less time there will be no end when the user in the motion picture shadow drag and drop. Some vendors will through cut LCD conductive ion concentration in the body to achieve the fast response signal,
But its color saturation, brightness, contrast will generate the corresponding lower, even produce the phenomenon of partial color. This signal response time was up, but at the expense of the LCD display
The effect. Some manufacturers such as "pure" USES is joined in the display circuit IC image output control chip, dedicated to display signal processing methods to achieve. IC core
Can according to the VGA output video signal frequency, adjust the signal response time. Because there is no change of physical properties of liquid crystal, so the brightness, contrast, color saturation
Influence, this kind of method of the manufacturing cost is relatively high.