A 1280 x 720 Micro-LED Display Driver with 10-Bit Current-Mode Pulse Width Modulation

Lee, Pei-Yi Lai; Yang, Yong; Li, Sih-Han; Sun, Jian-Jhih; Hung, Tzu Yi; Lu, Chin Lung; Fang, Yen-Hsiang; Kuo, Wei-Hung; Huang, Li-Chun; Su, Guo-Dung John; Chen, Poki

doi:10.1109/a-sscc53895.2021.9634720

Cited by 4 publications

(2 citation statements)

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“…where 2 bits represents the number of grayscales, Γ is gamma value, and duty ratio is the maximum emission time as a proportion of a frame time. For instance, in Ref [4], a 1280 x 720 μLED driver with a 90Hz frame rate was demonstrated, and the maximum emission time for a row is 20.778μs. Tmin is calculated as 0.105ns, which falls below the IC response time.…”

Section: Minimal Pulse Width Provided By Pixel Circuitmentioning

confidence: 99%

P‐10: Cost‐Effective Solution of Low Gray‐Level Performance Issue for MicroLED Driven by PWM Using Machine Learning

Wu,

Tai

2024

Symp Digest of Tech Papers

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A novel concept of “Cutoff gray‐level” is introduced for evaluation of MicroLED PWM pixel circuits at low gray‐level with consideration of gamma correction and device variation. Additionally, a cost‐effective two‐level dithering method is proposed and machine learning is used to establish its algorithm. This approach effectively deals with the issue of low grayscale performance in MicroLED displays driven by PWM.

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Section: Minimal Pulse Width Provided By Pixel Circuitmentioning

confidence: 99%

P‐10: Cost‐Effective Solution of Low Gray‐Level Performance Issue for MicroLED Driven by PWM Using Machine Learning

Wu,

Tai

2024

Symp Digest of Tech Papers

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“…DAC converts the discrete digital signal to continuous analog signal, and then inputs it to the pixel driving circuit to drive the LED to generate different grayscale [4]. Its disadvantage is that the DAC and pixel driving circuit with low speed and poor accuracy will limit the resolution and grayscale, which is not suitable for high resolution and high grayscale displays [5]. The digital pulse width modulation strategy mainly generates PWM signals through the driving circuit.…”

Section: Introductionmentioning

confidence: 99%

High frame rate scanning strategy of micro-LED silicon-based micro-display

Guo

Yang

2023

International Conference on Image, Signal Processing, and Pattern Recognition (ISPP 2023)

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High frame rate and high grayscale are the main direction of development of the silicon-based micro-display. Therefore, based on the research of image dithering algorithm and multi-frame fusion scanning strategy, a high frame rate scanning strategy is proposed. Under the conditions of frame rate of 200Hz, data transmission bit width of 8 bits, grayscale of 256, and resolution of 1024×768, this strategy can make data transmission efficiency reach 100% and data transmission frequency reach 52.429MHz, which can support high frame rate display with limited bandwidth. Then use diffierent scanning strategies to process images. By the analysis of images, grayscale distribution histogram and grayscale test images, it shows that after the procession of diffierent scanning strategies, the grayscale linearity of images is good, the phenomenon of image distortion is not obvious. It proves that the strategy can meet the needs of silicon-based micro-display.

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