A 10-Bit 1280 × 720 Micro-LED Display Driver With 2-Transistor Pixel Circuits and Current-Mode Pulse Width Modulation

Pei-Yi Lai Lee, Sheng-Hui Li, Tzu Yi Hung, Yawen Yang, Sih-Han Li, Jian-Jhih Sun, Chih-Wei David Lin, Chih‐Wen Lu, Yen‐Hsiang Fang, Wei-Hung Kuo, Li-Chun Huang, Guo-Dung J. Su, Poki Chen

2022IEEE Solid-State Circuits Letters17 citationsDOI

Abstract

This study proposes a 1280 × 720 micro-LED display driver with 10-bit current-mode pulse width modulation. A two-transistor pixel circuit and a precharge scheme are proposed. A 1280 × 720 micro-LED display driver with 3969 pixels per inch was fabricated using standard 0.18-μm CMOS technology. The measured maximal DNL and INL values were 0.33 and 1 LSB, respectively. A 1280 × 720 common-cathode micro-LED array was bonded on the display driver chip, hence the feasibility of the display driver was verified. The display was successfully lit up at a 90-Hz frame rate and a power consumption of 76.3 mW.

Topics & Concepts

CMOSDriver circuitPixelPulse-width modulationChipTransistorModulation (music)Electronic circuitFrame (networking)Electrical engineeringLED displayDot pitchLeast significant bitComputer scienceVoltagePhysicsEngineeringTelecommunicationsComputer visionOperating systemAcousticsCCD and CMOS Imaging SensorsThin-Film Transistor TechnologiesSemiconductor Lasers and Optical Devices