LCD Panel Classification
February 14, 2017
3. A liquid crystal panel for industrial control equipment [distinguished from its application requirements].
In fact, there is no such topic in academic articles, but in the application process, we can meet the application requirements of LCD screen in harsh environment (high temperature, low temperature, highlight, etc.). Basically point to those have wide temperature (working temperature is in - 30 -+ 80 degrees Celsius above), high brightness (brightness is in 400 lumen above, can work below strong light) liquid crystal screen. Mainly used in instrumentation, communication equipment, gold card engineering and other fields.
Analog LCD screen is divided into drive circuit board, analog screen and digital screen. The analog and digital data above refer to the drive circuit board of the LCD screen.
Good LCDS use digital and analog drive circuits (that is, they have DVI and D-SUB interfaces). Some low-cost LCDS use only analog drive circuits (only one interface is d-sub) because of cost control.
There is no difference between an analog screen and a digital screen on the screen itself. The main difference is the circuit.
All pixels added to the LCD screen are digital signals. At the edge of the screen, there are many lines that drive the IC, known as the driver. Behind the screen on the circuit board is mainly the controller. The controller converts the received signal into a driving signal that meets the timing requirements of the driver and sends it to the driver to light the corresponding pixel.
In the writing section of this article, analog and digital screens are the same, with the main difference being input.
Digital screen directly input digital signals, RGB each color signal by the video processing circuit into A number of digital signals, directly into the screen control driver, A/D conversion in the circuit front to complete.
Analog screen input is a three-color analog signal input, its A/D conversion is completed in the LCD screen circuit.
The analog signal will be affected by the surrounding interference during transmission, which will affect the transmission effect.
Digital signal transmission, transmission signal is more stable, better effect.