Multi-partition MiniLED Backlight Hybrid Dimming Design Based on FPGA
MAO Yanzun
TANG Zihan
YU Lifan
ZHENG Shuang
JIN Yuzhe
Abstract：This paper designs a 16×28 multi-partition lattice MiniLED backlight driver,controlled by 28 MPQ3326 driver ICs,with 16-channel control current output,adopts PWM and PAM mixed dimming technology to achieve partition brightness control.The drive voltage range of a single zone is 6～15 V,the current is adjustable in the range of 0.04～5 mA,the change accuracy is 0.01 mA,the total maximum current of all zones is calculated as 2240 mA,and the maximum output of the lamp board power supply is reserved for 4 A.The hardware adopts DC-DC BUCK buck power supply,the PCB layout adopts impedance reduction design,and the chip layout adopts anti-resonance loop and common mode noise design.The 2×8 pin signal connection port is designed to communicate with FPGA.The FPGA independently controls 448 backlight partitions and communicates with the driver IC through the I2C protocol to achieve local dimming.The design improves the dynamic contrast and HDR(High Dynamic Range)of the display,and the brightness of each area can be adjusted independently for higher contrast and richer colors when displaying dynamic images.
Keywords：MiniLEDlocal dimminghybrid dimmingmulti-partitionFPGA
Publication Date：2025-08-25
Online Publishing Date：2025-09-10(First online date of this platform, not the publication date of the document)
Pages：7( 64-69,90 )