The Asus G14 2022 laptop (GA402RK) has a unique LED matrix on the back cover of the screen. The LED matrix has 61 rows of up to 34 LEDs, but with the bottom left section missing, and with alternate rows offset in a diamond pattern. The cover has nine smaller holes in it for each LED, which is why each LED shows up through the cover as a number of smaller points.

Asus provides Windows software for controlling the display from gif, png, and text. For Linux, asusctl provides similar capabilities. Just for fun, I wrote a Linux/python script that reads the pixel data from a csv file and writes it directly to the matrix device. The code is here: