Medium 16x32 RGB LED matrix panel - 6mm Pitch : ID 420 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
SparkFun LED Array - 8x7 - COM-13795 - SparkFun Electronics
LED array display strategies. (a) Point control strategy gives each LED... | Download Scientific Diagram
Full Color RGB LED Matrix Driver Shield + RGB Matrix Screen
Adafruit Mini 8x8 LED Matrix w/I2C Backpack - Ultra Bright White : ID 1080 : $13.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: BTF-LIGHTING WS2812B RGB 5050SMD Individually Addressable Digital 8X8 64 Pixels 3.1in x 3.1in LED Matrix Panel Flexible FPCB Full Color Works with SP107E K-100C etc Image Video Display DC5V : Tools
Some LED array examples. | Download Scientific Diagram
BB LED Matrix | Open Neuroscience
National Semiconductor - A5120 - Vintage 12-Digit LED Array Bubble Display - Rare First Generation, Gold Plated