External - power - supplied LCD modules rely on an external power source, such as a wall adapter or a power supply unit connected to the electrical grid, to operate. This type of module is commonly used in applications where a stable and continuous power supply is required, and portability is not the primary concern.
The advantage of external - power - supplied LCD modules lies in their consistent and reliable power delivery. Unlike battery - powered modules, which may face limitations due to battery capacity and life, external - power - supplied LCDs can operate continuously without the need for frequent recharging or battery replacement. This makes them suitable for applications such as desktop monitors, large - screen digital signage in shopping malls and public spaces, and industrial control panels.
In terms of performance, external - power - supplied LCD modules can support higher - power - consuming features. For instance, they can drive large - size, high - resolution displays with bright backlights, providing excellent visual quality. The stable power supply also ensures that the LCD operates under optimal conditions, reducing the likelihood of performance fluctuations caused by power shortages.
The power conversion and regulation process in these modules is also crucial. The external power source typically provides alternating current (AC), which needs to be converted into direct current (DC) suitable for powering the LCD. Advanced power management circuits are used to regulate the voltage and current, protecting the LCD from power surges and ensuring stable operation.
However, one of the drawbacks of external - power - supplied LCD modules is their dependence on the electrical grid. In the event of a power outage, the display will cease to function unless an uninterruptible power supply (UPS) is installed. Additionally, the need for a power cord connection may limit the placement and mobility of the device, making it less suitable for applications that require frequent movement or operation in remote locations without access to electricity.
