What is the difference between LCD and led?
Author:Liao Yi Time:2021-10-05 14:41 Browse(184)
After copying so much, I still didn't talk about the essence. Their essential difference is: LCD itself does not emit light, virtual external light source, such as your mobile phone screen (computer night screen), usually the light is not bright, you can only vaguely see gray, in addition, small size, low power consumption. LED is the light emitting diode, power consumption is relatively large LCD, many outdoor large screen is a large number of LED lights together.
The essential difference between them is that the LCD itself does not emit light.
virtual external light source, such as your mobile phone screen (computer night screen), can only vaguely see the gray level when the light is not on. In addition, it is small in size and low in power consumption.
LED is the LED that will emit light.

What is the difference between LCD and led?

the power consumption is relatively large compared with LCD, Many outdoor large screens are made up of a large number of LED lights.
the original text of LCD is liquid crystal display.
it is composed of the first letter of each word, which is often called "liquid crystal flat panel display" or "liquid crystal display" in Chinese.
its working principle is to make use of the physical characteristics of liquid crystal: the arrangement becomes orderly when power is on.
it makes light easy to pass through; The advantages of LCD are: compared with CRT display.
the advantages of LCD mainly include zero radiation, low power consumption, small heat dissipation, small volume, accurate image restoration, sharp character display, etc.
choose LCD.
there are several basic indicators: high brightness: the higher the brightness value, the higher the brightness value, The brightness unit is CD / m2.
that is, candlelight per square meter.
the brightness value of low-level LCD is as low as 150 CD / m2, while that of high-level display is as high as 250 CD / m2.
high contrast: the higher the contrast is, the brighter the color is.
on the contrary.
the lower the contrast is, the poorer the color is, The image will also become flat.
the contrast value is quite different.
it can be as low as 100:1, or as high as 600:1, or even higher.
the contrast value is very differentBroad visual range: the visual range refers to the clear range that can be seen in front of the screen.
the larger the visual range is.
naturally, it is easier to see; The smaller the value is, the clearer the picture will be if the viewer changes the viewing position a little.
the algorithm of visual range is from the middle of the picture.
the clear angle range of the picture is from the top, bottom, left and right directions.
the larger the value is.
the wider the range is naturally, but the range of the four directions is not necessarily symmetrical.
some manufacturers will add the angle values on both sides and mark them as horizontal: 160 °; Vertical: 160 °; It may also be marked separately as left / right: ± 80 °; Up / down: ± 80 °.
some LCD models have a single angle.
even only 40 ° to 50 °. Fast signal response time: signal response time refers to the time that the system receives the instructions from the keyboard or mouse, and then processes them by CPU.
signal response is very important for animation and mouse movement.
generally speaking, this phenomenon only occurs on LCD, The faster the signal response time is, the more convenient the task processing is.
one of the methods of observation is to move the mouse quickly (that is, the mouse keeps moving down to indicate to the system.
the system keeps responding to the signal to the display). On a low-level LCD display, the cursor will disappear when it moves quickly until the mouse is positioned, No longer move after a short period of time, will appear again; When moving at normal speed, you can also see the trace of mouse movement clearly.
while the response time of ve500's ultrafast signal is as fast as 16ms.
it makes the cursor move without time difference,The mobile process is clear and easy to see, which does not bring work trouble.

LED is the abbreviation of light emitting diode.

LED applications can be divided into two categories: one is led single tube applications.
including backlight LED, infrared LED, etc; At present, there is a certain gap between China and the world in the manufacturing of LED basic materials, but as far as LED display is concerned, China's design and production technology level is basically in line with the international level.

LED is a display device composed of LED arrays.
it adopts low voltage scanning drive.
it has the following advantages: low power consumption, long service life, low cost, low cost, low cost, low cost, low cost, low cost, low cost, low cost, low cost, low cost and so on It is characterized by high brightness, few faults, large viewing angle and long visual distance
Related topics