Journal
NANOMATERIALS
Volume 12, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/nano12061032
Keywords
mini-light-emitting diodes; extra-thin; high luminance; microlens arrays (MLAs); quantum-dot film; uniformity merit function; total internal reflection
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Funding
- Ministry of Science and Technology (MOST) of Taiwan [MOST 110-2622-E-005-009, MOST 110-2221-E-194-036]
- Darwin Precisions Corporation
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This paper proposes a design for extra-thin, large-area, and high-luminance flat-panel displays by incorporating a light guide layer with a microstructure above the mini-light-emitting diode light board. Experimental results demonstrate that the module achieves high uniformity, average luminance, and color reproduction.
The demand for extra-thin, large-area, and high-luminance flat-panel displays continues to grow, especially for portable displays such as gaming laptops and automotive displays. In this paper, we propose a design that includes a light guide layer with a microstructure above the mini-light-emitting diode light board. The light control microstructure of concave parabel-surface microlens arrays on a light-emitting surface increases the likelihood of total internal reflection occurring and improved the uniformity merit function. We used a 17 in prototype with quantum-dot and optical films to conduct our experiments, which revealed that the thickness of the module was only 1.98 mm. When the input power was 28.34 watts, the uniformity, average luminance, and CIE 1931 color space NTSC of the prototype reached 85%, 17,574 cd/m(2), and 105.37%, respectively. This module provided a flat light source that was extra thin and had high luminance and uniformity.
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