Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Dual Fabry-Perot Interferometer to Improve the Color Purity of Displays

  • Keun Soo Shin (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Jun Yong Kim (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Yun Seon Do (School of Electronic and Electrical Engineering, Kyungpook National University)
  • Received : 2022.12.22
  • Accepted : 2023.03.08
  • Published : 2023.04.25
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Abstract

We propose a dual Fabry-Perot interferometer (DFPI) structure that combines two Fabry-Perot interferometers. The structure is designed to have spectral peaks in the red, green, and blue regions simultaneously, to be applicable to R, G, and B subpixels without any patterning process. The optimized structure has been fabricated on a glass substrate using a thermal evaporation technique. When the DFPI structure was attached to the quantum-dot color-conversion layer, the full width at half maximum values of the green and red spectra decreased by 47.29% and 51.07% respectively. According to CIE 1931 color space, the DFPI showed a 37.66% wider color gamut than the standard RGB color coordinate. Thus it was experimentally proven that the proposed DFPI structure improved color purity. This DFPI structure will be useful in realizing a display with high color purity.

Keywords

Acknowledgement

Technology Innovation Program (20016350, Development of ultra high quality with life longtime of color converting material, process and module for extremely largearea micro LED display) funded by the Ministry of Trade Industry & energy (MOTIE, Korea); Alchemist Project grant funded by Korea Evaluation Institute of Industrial Technology (KEIT) and the Korea Government (MOTIE) (Project Number: 1415179744, 20019169); Korea Institute of Energy Technology Evaluation and Planning(KETEP) and the Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea (No. 20224000000150).

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