Analog PWM Method With Sweep Generation Structure Based on P-Type LTPS TFTs for Micro-LED Displays

Lin, Chih-Lung; Ke, Cheng-Han; Chang, Jui-Hung; Lin, Chieh-An; Wu, Chia-En; Lee, Ming-Hsien

doi:10.1109/jeds.2023.3324065

IEEE J. Electron Devices Soc.

2023

DOI: 10.1109/jeds.2023.3324065

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Analog PWM Method With Sweep Generation Structure Based on P-Type LTPS TFTs for Micro-LED Displays

Chih-Lung Lin,

Cheng-Han Ke,

Jui-Hung Chang

et al.

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Cited by 8 publications

References 24 publications

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A new gate driver employing linearly sweep signal generated module for high‐resolution micro‐LED display with line‐by‐line pulse width modulation driving method

Zhang,

Mei,

Zhou

et al. 2024

J Soc Info Display

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A new gate driver with metal oxide thin‐film transistors (MO‐TFTs) has been presented for micro‐light‐emitting diode (Micro‐LED) display. The proposed gate driver employing linearly decreasing sweep signal generated module could realize the line‐by‐line pulse width modulation (PWM) driving method, which is valuable for application in high‐resolution Micro‐LED display compared with the conventional driving method employing global sweep signal. A simple Micro‐LED pixel circuit including an inverter module driven by the analog PWM method is employed to demonstrate the feasibility of the proposed gate driver. A 10 × 10 green Micro‐LED display array has been fabricated with MO‐TFTs backplane technology. It is shown that a 10‐μs width pulse and linearly scanning sweep signal can be successfully output. Consequently, the pixel circuit array can be driven properly under analog line‐by‐line PWM driving method.

show abstract

A new gate driver employing linearly sweep signal generated module for high‐resolution micro‐LED display with line‐by‐line pulse width modulation driving method

Zhang,

Mei,

Zhou

et al. 2024

J Soc Info Display

View full text Add to dashboard Cite

show abstract

P‐6.17: Design of Compact A‐PWM Gate Driver Based on LTPS TFTs for Progressive‐Mode μLED Displays

Zhu,

Qian,

Song

et al. 2024

Symp Digest of Tech Papers

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A compact gate driver using p‐type low‐temperature polycrystalline silicon (LTPS) thin‐film transistors (TFTs) was proposed for Micro‐Light Emitting diodes (μLEDs) display using progressive emission analog pulse‐width modulation (A‐PWM) approach. The gate driver contains a simple waveform shaping module and outputs multiple sweep signals, including SW[n], EM[n], and S[n], by reusing the bootstrap node. Compared with conventional schemes, the proposed gate driver renders static power consumption reduction of the μLED display by 29.2%.

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P‐23: Low Power A‐PWM μLED Pixel Circuit of Progressive‐mode Using Single Sweep Signal for Mobile Displays

Zhu,

Song,

Qian

et al. 2024

Symp Digest of Tech Papers

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An analog pulse‐width‐modulation (A‐PWM) Micro‐LED (μLED) pixel circuit based on low‐temperature‐polysilicon (LTPS) thin‐film transistors (TFTs) for mobile displays is proposed. The progressive‐emission mode is implemented using a single Sweep (SW) signal by in‐pixel logic operation circuits. By adjusting the emission time of the progressive‐emission mode, the μLED is biased with the maximum quantum efficiency (EQE). Consequently, the static power consumption of proposed pixels is reduced by 29.2%, compared with conventional schemes.

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Analog PWM Method With Sweep Generation Structure Based on P-Type LTPS TFTs for Micro-LED Displays

Cited by 8 publications

References 24 publications

A new gate driver employing linearly sweep signal generated module for high‐resolution micro‐LED display with line‐by‐line pulse width modulation driving method

A new gate driver employing linearly sweep signal generated module for high‐resolution micro‐LED display with line‐by‐line pulse width modulation driving method

P‐6.17: Design of Compact A‐PWM Gate Driver Based on LTPS TFTs for Progressive‐Mode μLED Displays

P‐23: Low Power A‐PWM μLED Pixel Circuit of Progressive‐mode Using Single Sweep Signal for Mobile Displays

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