利用超穎介面及有機發光二極體達成裸眼式立體顯示器之研究

Abstract

隨著科技的進步與顯示器性能的提升，立體顯示越來越普及化，追求與現實更相近與還原度更高的影像，以達到滿足人類的視覺需求。在2013年David Fattal等人提出以多指向性背光源來實現廣角裸眼顯示技術，LED透過波導技術與液晶搭配，將圖像顯示在正確方向上。 而本篇論文中，以提出了metasurface結合OLED的模型，空間多工式將同多個影像經由反射產生指向性，分成不同視角區域，以FDTD模擬電磁波的傳播過程，使用光學模擬軟體來調變不同參數，模擬分析OLED與高指向性OLED在不同週期的metasurface結構之遠場角度分佈、出光效率及發光頻譜。 本研究所要解決裸眼顯示技術中不同視角區域的光源指向性不足的問題，所以透過DBR共振元件結構的高指向性OLED，使用陣列的點光源來模擬發光區，使下發光的部分透過底部有週期性的metasurface能有聚焦的效果，在此聚焦是指發散角大角度的部分強度下降。 在未來的研究中，不只可以改變OLED的膜層結構設計來增加出光指向性，也可以透過出元件後再經過光柵或是穿透式metasurface的結構，達到角度偏折的部分外，還能使光的指向性更進一步的提升，crosstalk得以改善，來達到裸眼立體顯示中更好的影像品質。

With the advancement of technology and the improvement of display performance, stereoscopic display has become more and more popular, and pursuit of more realistic images with higher image quality to meet the visual needs of human beings. In 2013, David Fattal proposed a multi-directional backlight for a wide-angle, glasses-free three-dimensional display, LED through waveguide technology with the liquid crystal, the image is displayed in the correct direction. In this paper, the model of metasurface combined with OLED is proposed. The spatial multiplexing method will generate directionality with multiple images via reflection, and divide into different viewing regions to simulate the propagation process of electromagnetic waves by FDTD, and use optical simulation software to modulate different parameters are used to simulate the far-field intensity distribution, light-emitting efficiency and luminescence spectrum, of OLED and high-directional OLED, in different periods of metasurface structure. In this research, the problem of the lack of directionality of the light source in different viewing angle areas in the naked eye display technology is solved. Therefore, the high-directionality OLED through the DBR resonant structure is used to simulate the light-emitting area by using the point light source array, so that the lower light-emitting portion has periodicity through the bottom the metasurface can have a focusing effect, where focusing refers to a partial intensity drop at a large angle of divergence. In future research, not only can the OLED film structure design be changed to increase the light directivity, but also through the structure of the grating or the transmissive metasurface to achieve the angle deflection, the directionality of light is further improved, and crosstalk can be improved to achieve better image quality in naked-eye stereoscopic display.