Why do solar inverters/UPS devices use the segment LCD display?

Segment LCD display is a type of LCD screen that displays fixed characters, numbers, and symbols through stroke segments. It is different from dot matrix screens in that it does not form graphics through pixels, but rather each pen segment (such as the seven segments of a number "8") is individually controlled.

Solar inverters/UPS devices commonly use disconnect screens, mainly based on the following key factors:

1. Low power consumption:

The segment lcd display itself is a passive display that can be clearly seen in ambient light without the need for backlight (although some models offer optional backlight, it can usually be turned off).

2. High cost performance:

The structure of the broken code screen is very simple (fixed pattern electrodes, liquid crystal layer, polarizer), and the production process is mature.

Compared to full dot matrix liquid crystal displays (TFT-LCD) or OLED screens, its manufacturing cost is very low.

3. High reliability and long lifespan:

Simple structure means fewer fault points. There are no complex thin film transistor arrays and driving circuits. The LCD display material and structural design give it an extremely long service life, usually matching the design life of the inverter itself (10-15 years or longer).

4. Wide working temperature range

It can usually work from -20 ℃ to 70 ℃, or even wider, suitable for outdoor or industrial applications with large temperature changes.

Inverters are usually installed outdoors or in places with poor environmental conditions (such as garages, attics, computer rooms), which may experience high temperatures, low temperatures, and high humidity. The broken code screen performs more stably and reliably under these conditions

5. Flexible customization

Customized segment code content can be designed based on the product's functionality, such as battery symbol, warning light, load indicator, etc., to make the UI intuitive and clear.

For devices that only need to display numbers, units, and a small number of icons, the pop-up screen perfectly meets the functional requirements and is aesthetically pleasing and simple.

Why not use a more advanced display screen?

1. High cost: TFT display or OLED screens are much more expensive than break screens.

2. Excessive power consumption: High resolution screens, their driving circuits, and backlight will significantly increase the power consumption of the inverter itself, reducing system efficiency.

3. Reliability risk: In harsh environments (high temperature, low temperature, humidity), the failure rate of complex screens is higher.

The application of the segment LCD display in solar inverters is the result of a perfect balance between cost, power consumption, reliability, lifespan, and basic functional requirements. It provides the most necessary information display at the lowest cost (cost and power consumption) and maintains extremely high stability and durability in the harsh environment of the inverter.

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