Which is better, LVDS interface LCD screen or RGB interface LCD screen?
LVDS and RGB are two common interface technologies in LCD screens, each with its own advantages. There is no absolute "good" or "bad", the key depends on your specific application scenario and needs.
LVDS and RGB are two common interface technologies in LCD screens, each with its own advantages. There is no absolute "good" or "bad", the key depends on your specific application scenario and needs. The table below clearly shows their core differences, and I will explain how to choose based on requirements later.
Feature dimension | RGB interface | LVDS interface |
Essence and Principle | Parallel transmission. Directly transmit RGB raw data, clock, and synchronization signals for each pixel | Serial differential transmission. Convert RGB and other signals into low-voltage differential serial data streams |
Signal lines and layout | There are many wires (such as over 25 wires required for 24 bit color), complex PCB layout, and large connectors. | Few wires (usually 4-5 pairs of data wires+1 pair of clock wires), simple wiring, and small connectors. |
Anti interference and distance | Weak anti-interference ability, single ended signal susceptible to interference, short transmission distance | Strong anti-interference ability, differential signal suppresses common mode noise, suitable for longer distance transmission (meter level) |
Power consumption and EMI | Relatively high power consumption, large voltage swing (such as 3.3V), and significant electromagnetic interference (EMI) | Low power consumption, small voltage swing (about 350mV), and extremely low EMI |
Cost and complexity | The interface is simple and does not require dedicated encoding/decoding chips, but the difficulty of wiring, connectors, and cabling may increase system costs | The need for dedicated LVDS chips for both sending and receiving ends increases chip costs, but the cost of wiring and cabling is low |
Typical Applications | Short distance board level connections, such as MCU driven small and medium-sized screens, embedded devices | High resolution large screen (such as laptops, LCD TVs), long-distance or high anti-interference scenes |
How to choose
Based on the above comparison, you can follow the following principles when making a choice:
Priority selection of RGB interface:
The project is extremely cost sensitive and can accept complex PCB wiring.
System design involves short distance board level connections (usually same board or short cable connections).
The screen resolution used is not high (such as small and medium-sized screens).
The main control chip directly outputs RGB signals, hoping for the simplest system structure.
Priority selection of LVDS interface:
Need to drive high-resolution, large-sized screens (such as televisions and high-end displays).
The signal needs to be transmitted over a long distance (such as tens of centimeters or more), or in situations where the system is in a complex electromagnetic environment.
The product has strict limitations on power consumption and electromagnetic radiation (EMI) (such as portable devices or requiring strict EMC certification).
Pursuing simpler internal wiring and thinner physical structure.
I hope the above analysis can help you make wise decisions. If you can tell me specifically what field your product is used in, or what rough requirements you have for screen size, resolution, and budget, I can give you more specific advice.
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