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Multi-grayscale driving system for passive-matrix alternating current electroluminescence display

Qitian Fan, Jintao Shi, Simu Zhu, Bo-ru Yang, and Shaozhi Deng

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Abstract

Alternating current electroluminescence (ACEL) has great potential in flexible displays, especially in textile displays. However, since ACEL needs high-frequency, high-voltage AC signal to drive, there remains no driving scheme for pixelated ACEL display to achieve multiple gray scales. In this work, a driving scheme based on full-bridge inverters is proposed for passive-matrix ACEL (PMACEL) display, which achieves multiple gray scales by changing the duty cycle of the square wave. A single-pixel ACEL displaying 16 gray levels (4 bits) and a 5 × 8 fabric PMACEL displaying eight gray levels are demonstrated, enabling flexible ACEL devices to exhibit more vivid tones on a fabric substrate.

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Supplementary Material (1)

NameDescription
Supplement 1       This supplemental document includes ACEL's response under low pulse width, a photo of the proposed driving system and a list of experiment related devices and materials

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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