Design of free-form surface backlight unit for displays

N. I. Petrov

doi:10.1117/12.2525859

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21 June 2019 Design of free-form surface backlight unit for displays

N. I. Petrov

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Proceedings Volume 11062, Digital Optical Technologies 2019; 1106206 (2019) https://doi.org/10.1117/12.2525859
Event: SPIE Digital Optical Technologies, 2019, Munich, Germany

Abstract

In this paper the designs of secondary lenses for LED of reflective and refractive types are proposed for extended sources. The lens surface profile for desired illumination pattern on a screen can be obtained by solving first-order differential equations based on the Snell’s law and the energy conservation. Intensity distributions on a target screen were received by ray tracing using Zemax software. High efficiency ultra-slim lenses with illumination areas exceeding the distance between the LED chip and screen by more than six times are demonstrated for different chip sizes. Aspheric lenticular and two-dimensional microlens arrays are designed using wave-optics and ray-tracing methods. Possibility of development of high resolution and wide viewing angle 3D display based on free-form backlight unit is discussed.

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N. I. Petrov "Design of free-form surface backlight unit for displays", Proc. SPIE 11062, Digital Optical Technologies 2019, 1106206 (21 June 2019); https://doi.org/10.1117/12.2525859

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