What is an LED? The
LEDs are the initials of the light-emitting diode Lightemittingdiode.
LED applications can be divided into two categories: one is led single tube applications, including backlight led, infra-red LED, and so on, the other is led display, at present, China in the production of LED basic materials and the international still have a certain gap, but in terms of LED display, China's design and production technology is basically synchronized with the international level. The
LED display is a display device arranged by a light-emitting diode. It adopts low voltage scanning drive, which has the characteristics of less power consumption, long service life, low cost, high brightness, less fault, large angle of view and far distance from visual range.
What is an LCD? The original text of the
LCD display is Liquidcrystaldisplay, which consists of the first letter of each word, which is called "Flat panel Monitor" or "liquid crystal display" in Chinese. Its working principle is to use the physical characteristics of liquid crystal: When the arrangement becomes orderly, so that light is easy to pass, no power to arrange chaos, to prevent light through, say simple point is to let the liquid crystal such as gate barrier or let light penetrate. The benefits of the
LCD are: Compared with CRT monitors, the advantages of LCD mainly include 0 radiation, low power dissipation, small heat dissipation, small size, accurate image restoration, sharp character display, and so on.
To choose LCD, there are several basic pointers:
High Brightness: The higher the brightness value, the more beautiful picture, not hazy fog fog. The unit of brightness is cd/m2, which is the candle light per square metre. Low-order LCD brightness values, low to 150cd/m2, and higher-order displays can be as high as 250cd/m2. High contrast: The higher the contrast, the more vivid the color saturation, and will show three-dimensional. Conversely, the contrast is low, the color is poor, and the image becomes flat. Contrast values vary considerably, with a low to 100:1, and a high to 600:1, or even higher.
Broad Visual Range: visual range simply, refers to a clear range of images that can be seen in front of the screen. The larger the range of visibility, the easier it is to see; the smaller the viewer, the less visible it may be as long as a slight change in the viewing position. The visual range of the algorithm is from the middle of the screen, the first, next, left, right four direction screen clear angle range. The larger the number, the wider the range, but the four-direction range is not necessarily symmetrical. When the top and bottom symmetry, some manufacturers will be two sides of the angle value added, marked as horizontal: 160°; vertical: 160°; may also be labeled as Left/right: ±80°; up/down: ±80°. Some LCD machine species of a single angle, even only 40°~50°.
Fast signal response time: Signal response refers to the system after receiving the keyboard or mouse instructions, CPU calculation processing, reactionTime to the monitor. Signal response to animation and mouse movement is very important, this phenomenon in general, only occurs on the LCD liquid crystal display, CRT traditional tube display is not the problem. The quicker the signal response time, the more convenient it is to handle the job. One way to observe this is to move the mouse fast (that is, the mouse is constantly instructed to the system, the system will constantly respond to the signal to the display, in the general lower-order LCD display, the cursor in the fast moving, the process will disappear, until the mouse positioning, no longer move after a short period of time, will appear again While in general speed action, the movement process will also clearly see the mouse movement traces. and VE500 fast signal response time of up to 16ms (milliseconds), then let the cursor move without jet lag, moving process is clear and easy to see, do not bring homework trouble.
LEDs compare with LCD
LED displays are more advantageous in brightness, power consumption, visual angle, and refresh rate than LCD displays. LED and LCD power consumption is about 10:1, and higher refresh rate makes the LED in the video has a better performance, can provide 160° perspective, can display a variety of text, numbers, color images and animation information, can also play TV, video, VCD, DVD and other color video signal, Multiple displays can also be broadcast on the Internet. Organic LED display of the single element reaction speed is 1000 times times the LCD screen, in strong light can also be looked after, and adapt to 零下40度 low temperature. The use of LED technology, you can create a thinner than the LCD, brighter, clearer display, has a wide range of application prospects.
Simply put, LCD and led are two different display technologies, LCD is made up of liquid crystal display, and LED is made up of light-emitting diode display. LED display compared with LCD display, led in brightness, power consumption, visual angle and refresh rate, etc., are more advantageous.