LCD has roughly the following two structural and functional characteristics.
Types of LCD modules
LCD modules are based on LCD liquid crystal screen as the core, with a certain control circuit, in order to achieve the purpose of convenient use of display components. According to the LCD can display different content, LCD display module can be divided into the following three types:
1. Digital display LCD module
2. Dot matrix character LCD module
3. Dot matrix graphics LCD module
LCD display module advantages
LCD display the most important advantage is to display multiple lines of Chinese characters as well as graphics.
LCD module driver 1, LCD module driver overview: LCD module driver debugging, is a very important part of the entire cell phone development process, in the early stages of the development of each new model, the first to debug the LCD module driver, we commonly known as “point screen” LCD Display module
We call it “dot screen” LCD module. The “dot screen” debugging includes two parts, one is to light up the LCD backlight, the second is to debug the LCD display. Backlight driver debugging methods and techniques, will be described in the backlight document.
LCD module 1. vertical polarization of the incident light; 2. glass base plate with indium tin oxide (ITO) transparent electrode LCD module
It has been found through research that charging a liquid crystal changes its molecular arrangement, which in turn causes distortion or refraction of light. LCD is made according to this principle.
LCD structure and principle
LCD itself does not emit light, it is a passive display by adjusting the brightness of light to achieve the display effect.LCD is mainly made by using the twist-vector effect of liquid crystal, which is an electric field effect. Here first of all, we introduce the structure and principle of LCD, as well as its technical and technological characteristics. This will enable the purchase of the target, more scientific and reasonable use and maintenance. Liquid crystal is an organic complex, consisting of long rod-like molecules. In their natural state, the long axes of these rod-like molecules are roughly parallel. The shape of the transparent electrodes will determine the address of the dark color that is displayed without light passing through when the power is turned on to the LCD. Vertical stripes are etched on the base plate, this way the liquid crystal arrangement direction, will be the same direction as the incident light after polarization.
LCD module seven, the module storage if long-term (such as more than a few years) storage, we recommend the following ways: 1. in a polyethylene pocket (preferably with anti-static coating) and seal the mouth; 2. never put any items on the surface pressure; 3. put the LCD module in a dark place, avoid strong light; 4. stored between 5 ° C ~ +30 ° C; 5. strictly avoid storage in the extreme temperature / humidity conditions. 4 . dot matrix LCD module display contrast, viewing angle and temperature, drive voltage has a great relationship, so if the VEE adjustment is too high, not only will affect the display, but also shorten the service life of the module; 5. module in use, access to power and disconnect the power supply, must be in the positive power supply after stable access to input signal level. If the signal level is input before or after the power supply is stabilized, it may damage the IC and circuit in the module.