Dalian Eastern Display Co., Ltd.
Dalian Eastern Display Co., Ltd.
A 20x4 LCD display is a common type of liquid crystal display (LCD) module. The 20x4 refers to its dimensions: 20 characters across and 4 lines high. These displays are relatively inexpensive and readily available, making them popular choices for numerous applications. They are characterized by their ease of use and straightforward interface, typically requiring only a few control pins. This makes them ideal for hobbyists, students, and embedded systems developers.
The character size on a 20x4 LCD display varies slightly depending on the manufacturer, but generally, each character occupies a 5x7 or 5x8 pixel grid. This results in a total resolution that is not always explicitly stated but can be easily calculated based on the character size and the number of characters per line. For example, a 5x7 dot matrix character on a 20x4 LCD translates to a display of 100x28 pixels (approximately).
Most 20x4 LCD displays use a parallel interface, often utilizing an HD44780 controller chip or a compatible alternative. This interface requires multiple data and control lines to communicate with a microcontroller. Some newer models may offer I2C or SPI interfaces, simplifying the wiring and reducing the number of GPIO pins required on the microcontroller.
These displays often include a backlight for improved visibility in low-light conditions. Common backlight colors include white, blue, green, and yellow. Choosing the right backlight depends entirely on the intended application and aesthetic preferences.
Selecting the appropriate 20x4 LCD display depends heavily on your specific needs and project requirements. Consider the following factors:
Ensure the display's interface (parallel, I2C, or SPI) is compatible with your microcontroller or other controlling device.
Choose a backlight color that provides sufficient contrast and visibility in your application's environment. The availability of different backlight types will also depend on the manufacturer and model. Some offer adjustable brightness levels.
While most 20x4 LCD displays use a standard character size and font, variations exist. If readability is critical, it is best to consult the display's datasheet which typically provides relevant font specifications.
Check the display's operating voltage and current consumption to ensure it's compatible with your power supply.
20x4 LCD displays find application in various fields, including:
Their relatively low cost and simple interface make them versatile tools for displaying information in a compact format. You can use them for anything from simple text displays to more complex real-time data visualization.
Due to the vast number of manufacturers and models, a comprehensive comparison table here would be extensive. To find the best 20x4 LCD display for your needs, we recommend researching various distributors and checking specifications.
For example, you can find a wide variety of these displays at electronics retailers online. Remember to always check the datasheets for specific details.
Consider exploring high-quality displays from reputable manufacturers such as those found at Dalian Eastern Display Co., Ltd. for superior performance and reliability in your projects. Their extensive range of LCD modules often includes detailed specifications and technical support. Choosing a reliable supplier is crucial for project success.
| Feature | Model A | Model B |
|---|---|---|
| Interface | Parallel | I2C |
| Backlight | White LED | Blue LED |
| Character Size | 5x7 | 5x8 |
Remember to always consult the datasheets provided by the manufacturer for complete specifications and detailed information about each model. This ensures compatibility and successful integration into your projects.
