There are five connection methods for the LCD module:
1. Zebra strip connection.
2. Metal pin connection.
3. Heat-sealed connector connection.
4. Hot-pressed integrated circuit chip (COG).
5. Hot press the packaging with tape.
The choice of liquid crystal display module also needs to be based on the actual situation:
1. Display content
When choosing to purchase an LCD module, consider the display content of the screen, and determine the dot matrix based on the display content. Second, determine the size of the liquid crystal (including shape and effective display area) according to the structure.
2. Use environment
Then consider the environment in which the display screen is used: temperature, light, humidity, mechanical strength, etc. (Temperature type: normal temperature type 0-+50 degrees, wide temperature type -20-+70 degrees); in addition, according to the lighting conditions of the use environment, select a) and reflective type (no backlight, lighting or daytime use), suitable for Outdoors with strong light. b) Transflective type (with backlight, illumination or dark part), the backlight can be turned on and off according to the light, suitable for outdoor use. c) Transmissive type (with backlight, illumination or darkness), the backlight must be turned on, not suitable for outdoor use.
In the actual use of liquid crystal modules, due to product structure, electromagnetic interference, oil pollution, etc., it is always necessary to keep the liquid crystal module as far away from the control panel as possible, such as early medical equipment, industrial equipment, car display and other applications. So the question is, how long is the connection between the LCD module and the motherboard?
Since the LCD module outputs SPI signals, it is not suitable for long-distance connection. Generally speaking, if the signal exceeds 50 cm, the signal will be very weak, which may cause display abnormalities. The connection line control line is best controlled within 30CM. In order to eliminate electromagnetic interference, oil pollution and other problems, the anti-electromagnetic interference capability of the liquid crystal module can be enhanced by adding a shielding cover. If necessary, you should choose a connecting wire with shielding function. Or add a closed box outside the liquid crystal module, and the front side is closed with a transparent sheet, which can theoretically isolate dust, oil and other pollution. If the box behind the LCD module is made of a metal shell, it can also play a role in anti-interference.
How long is the connection cable between the LCD module and the motherboard?
2021 12/20