How to Displaying Custom Characters, Graphics, and Dynamic Content on an Alphanumeric LCD Display Module

Alphanumeric LCD display modules are versatile and widely used in various applications. They offer the ability to display not only standard characters and symbols but also custom characters, graphics, and dynamic content. In this article, we will explore the process of creating and displaying custom characters or graphics on an alphanumeric LCD display module, as well as how to showcase dynamic content like scrolling text or animation.

Custom Characters and Graphics

Alphanumeric LCD display modules typically come with a predefined set of characters and symbols. However, you can go beyond these limitations by creating your own custom characters or graphics. By utilising the LCD controller’s command set, you can load a pixel matrix representing your custom character or graphic into the character generator RAM of the LCD. This allows you to display unique symbols, logos, or even stylized fonts that align with your project’s branding or specific requirements.

The process involves determining the pixel matrix for your custom character or graphic, usually in a 5x8 or 5x10 format. Once the pixel matrix is defined, you can use the appropriate commands to load it into the LCD’s character generator RAM. From there, you can display your custom character or graphic at any desired position on the LCD by using the corresponding character code.
 

Dynamic Content

Alphanumeric LCD display modules are known for their limited character display capacity. However, with some clever techniques, you can still showcase dynamic content, such as scrolling text or animation.

For scrolling text, you can divide the text into smaller parts and gradually update the displayed content at regular intervals. By continuously refreshing the text content, you can create the illusion of text scrolling across the screen. This technique is particularly useful when you need to display longer messages or announcements within a limited character space.

Animation on an alphanumeric LCD display module can be achieved by breaking down the animation into a series of static images. By rapidly changing the displayed image at each time interval, you can create the perception of motion. This technique is effective for displaying simple animations or visual cues that enhance the user experience.

To implement dynamic content, you need to determine the speed and direction of the scrolling text or animation. By using the LCD controller’s commands, you can load the text or image into the display RAM of the LCD and update it at each time interval. Additionally, you may need to incorporate delay functions to control the timing between frames, ensuring smooth and seamless transitions.

Conclusion

Alphanumeric LCD display modules offer more than just basic character and symbol display. With the ability to create custom characters or graphics and showcase dynamic content like scrolling text or animation, these modules provide endless possibilities for personalisation and creativity. By following the steps outlined in this article, you can unlock the full potential of your alphanumeric LCD display module and create captivating visual displays for your projects.