- Post by Sagar Sapkota
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In the context of RGB LED matrices, "1/4 scan" refers to a method of driving the LEDs in the matrix. In LED matrices, each LED needs to be controlled individually, but doing so for each LED can be computationally expensive and inefficient. Therefore, LEDs are often arranged in rows and columns, and multiplexing techniques are used to control them efficiently.
In a 1/4 scan method, the LED matrix is divided into four sections, and each section is scanned sequentially. During each scan, the LEDs in that section are turned on or off according to the desired display pattern. This method reduces the number of connections required to control the LEDs, making it more efficient than scanning each LED individually.
Here's a simplified breakdown of the process:
- The LED matrix is divided into four sections.
- During each scan cycle, one section of the matrix is activated.
- Within the activated section, the individual LEDs are controlled to display the desired colors or patterns.
- After displaying the content for that section, the scan moves to the next section in sequence.
- This process repeats, cycling through all four sections to complete a full display update.
Overall, the 1/4 scan method allows for efficient control of RGB LED matrices while reducing the complexity of wiring and control circuitry.
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