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首页> 外文会议>Conference on nonimaging optics and efficient illumination systems >Further studies on output couplers for edge-lit backlight with emission angle control
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Further studies on output couplers for edge-lit backlight with emission angle control

机译：具有发射角度控制的边缘光背光输出耦合器的进一步研究

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We have studied designs of an edge-lit backlight that can switch its emission angle range between a narrow and a wide state. Here, we propose three types of output couplers for this type of backlight unit. These are quadratic prism, triangular prism and arc prism. The probability of extracting the light propagating inside a light-guide does not depend on its propagation angle for each of these output couplers. We conducted ray tracing analysis to compare these output coupler designs. The results show that approximately 65% illumination uniformity and 75% efficiency can be obtained with the quadratic prism. For each setting of the emission range, the width of the angular distribution is switched between 30 and 102 degrees (FWHM). Other two output couplers perform poorly in terms of these optical properties.
机译：我们研究了优化背光的设计，可以在窄和宽的状态之间切换其发射角度范围。在这里，我们为此类型的背光单元提出了三种类型的输出耦合器。这些是二次棱镜，三角形棱镜和弧形棱镜。提取在光导内部传播的光的概率不依赖于这些输出耦合器中的每一个的传播角。我们进行了光线跟踪分析以比较这些输出耦合器设计。结果表明，通过二次棱镜可以获得大约65％的照明均匀性和75％的效率。对于发射范围的每个设置，角度分布的宽度在30到102度（FWHM）之间切换。其他两个输出耦合器在这些光学性质方面执行差。

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