Development of an electronic system of driver and control for perfomance evaluation of displays based on polymer LEDs. / Desenvolvimento de um sistema eletrônico de acionamento e controle para avaliação de desempenho de mostradores de informações baseados em LEDs poliméricos.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

In this work it is presented the study and development of an electronic system of test for performance evaluation of polymer light-emitting diodes - PLEDs, or displays with up to 35 PLEDs in passive-matrix produced in laboratory. The drive and control requirements, based in structural and electric characteristics of PLEDs and PLEDs displays, carefully had been studied for definition of adequate circuits for control system. The developed equipment allows adjusting voltage and current levels, frequency and pulse width of signal power, to make possible variations of light emission in the motion devices. The system was evaluated using passive-matrix PLED display, that before passed for structural and electric characterizations, being that the results had served for voltage, current and frequency adjustment of signal power. The tests results had demonstrated that projected circuit takes care of all requirements and objectives for which was considered. The drive of reference display with the developed system allowed to performance evaluate of its light-emitting characteristics, as luminance, chromaticity and photometry, front voltage, current and pulse width variations of signal power. This information allows a database creation that assists researcher during performance evaluation and reproducibility of PLEDs or PLEDs displays produced in laboratory.

ASSUNTO(S)

mostradores de informação de matriz passiva polymer light-emitting diodes sistemas de controle passive-matrix displays drivers diodos emissores de luz poliméricos

ACESSO AO ARTIGO

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