| Summary: | 碩士 === 國立臺北科技大學 === 光電工程系 === 106 === In a general display backlight module, the light output surface always needs to be
combined with a polarizer to convert the original non-polarized light source into polarized
light. Using a general linear polarizer can easily achieve the effect, but it also means that
50 must be lost. The light extraction efficiency is above 5%. Therefore, the purpose of this
study is to design a backlight module with one side of light emission, which has the effect
of high homogeneity and linear polarized light output.
In this study, an optical simulation software (TraceProTM) was used for backlight
simulation, and a complete monitor simulation was performed with LCD simulation
software (LCD master 2D). The 2.8-inch-side backlight module is designed based on the
basic architecture. After the reflector is optimized, the design of the micro-structure and the
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selection of the birefringent material are performed. The purpose is to achieve uniformity
and linear polarization efficiency. Promote.
The results show that the linear polarization of the backlight module with CaCO3 as
the light guide plate material has the best effect. The three birefringent materials CaCO3,
Al2O3, and SiO2 were used as the backlight module of the light guide plate. Their
uniformities were74.63%,80.66% and 63.28%, respectively; polarization promotion rates
were 25.44%, 13.15%, and 11.82%, respectively. In addition to the original light guide
function, the light guide plate designed in this study can also enhance the linear polarization
effect, reduce the light output efficiency when the light source passes through the polarizing
plate, and increase the light source efficiency
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