Pixels are controlled through a grid system of row and column drivers, often employing a scanning method to selectively activate and set the color of each pixel.
Here's a breakdown of how this works, particularly focusing on LCD screens as exemplified in the reference material:
-
Scanning Mechanism (Gate Driver): Rows of pixels are activated sequentially, one line at a time, by a "gate driver." This process is very rapid, giving the illusion of the entire screen being updated instantaneously. Imagine it as lines being scanned line by line very fast.
-
Data Input (Source Driver): While a row is activated by the gate driver, the correct voltage for each pixel in that row is applied via column lines (often by a source driver). This voltage determines the brightness and color of the pixel.
-
Pixel State: Once the row is deactivated, the pixel maintains its set color and brightness until the next time that row is scanned and updated. This persistence relies on the properties of the liquid crystal material and capacitors within the pixel structure.
Simplified Analogy:
Think of a spreadsheet. The gate driver selects which row of the spreadsheet you are editing. The source driver then allows you to input data (color and brightness) into each cell (pixel) of that row. Once you move to the next row, the data in the previous row remains until you revisit it.
In essence, pixels are controlled by a systematic scanning process that enables precise adjustment of each pixel's color and brightness.
