The Pixel A2K™ chip is a display driver IC designed for active microLED arrays with up to 64 columns and 32 rows for a total pixel count of 2K. It supports microLED arrays with n-type transistor unit cells and common anode LEDs. The chip uses a digital 1-bit pixel level intensity ON/OFF control programmed with a 4-wire serial programming interface (SPI); and a global analog contrast adjusted with externally provided high- and low-reference voltages used as analog gate drive voltages for the microLED arrays using a rolling update scanning method to select each pixel in a row in parallel. The chip runs at 16 MHz clock and supports a wide range of frame rates from 25 fps (40 ms frame time) up to 2500 fps (0.4 ms frame time). The Pixel A2K chip operates with a simple 4-wire SPI with an additional row timing signal. It has a miniature size of 1.33 mm x 1.33 mm, designed for flip-chip assembly using bumps.

Key Features

• Display driver IC for active microLED and OLED arrays
• 64 (Columns) x 32 (Rows) with common anodes
• Voltage mode bi-polar row drivers (0–5 V range)
• Global contrast control using external high / low references
• 1-bit ON/OFF intensity control for pixels
• Operates with 4-wire SPI (16 MHz clk) and 1 external row control signal
• Frame rates from 25 fps (40 ms frame time) to 2500 fps (0.4 ms frame time)
• Dual supply operation: 5 V for row and column drivers, 1.8 V for digital core
• Miniature die size of 1.33 mm x 1.33 mm
• Designed for flip-chip assembly using bumps

Applications

• MicroLED displays with ≤ 2K resolution
• Multi-channel (≤ 64) bi-polar voltage drivers with fast refresh rate (≤ 200kHz)