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The study of LED uniform lightguide for liquid crystal display backlight applications

机译：用于液晶显示器背光应用的LED均匀光导的研究

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摘要

A conventional backlight unit (BLU) is used to as the light module to present uniform light of liquid crystal display (LCD). In general, cold cathode fluorescent lamp (CCFL) is utilized to be the light source of BLU. The light emitting diode (LED) is now considered well known as a promising device for solid state lighting. It has the advantages of long durability, no mercury substance and good endurance of heavy impact. To satisfy the market demands of the thin-film liquid crystal display (LCD) and the green product, the LED is applied to as the light source to make display thinner, lighter, no Hg containing. In this research, the LED uniform lightguide is demonstrated because it enables the point-like light to distribute propagating-light line pattern successfully. By optimizing the size and the radian of the device, the designed LED uniform lightguide can achieve the output efficiency more than 85%, and its illuminative uniformity is improved about 85%. Thus, the LED uniform lightguide not only can decrease the number of LED to save the space, but also enhance the optical efficiency. In the future, a novel LED uniform module could make displays thinner and lighter for backlight system applications.
机译：传统的背光单元（BLU）用作光模块以呈现液晶显示器（LCD）的均匀光。通常，冷阴极荧光灯（CCFL）被用作BLU的光源。如今，发光二极管（LED）被认为是固态照明的有前途的设备。它具有使用寿命长，不含汞物质和良好的耐冲击性的优点。为了满足薄膜液晶显示器（LCD）和绿色产品的市场需求，LED被用作光源以使显示器更薄，更轻，不含汞。在这项研究中，展示了LED均匀光导，因为它使点状光能够成功地分布传播光的线型。通过优化器件的尺寸和弧度，设计的LED均匀光导可以实现超过85％的输出效率，并且其照明均匀性提高了约85％。因此，LED均匀光导不仅可以减少LED的数量以节省空间，而且可以提高光学效率。将来，新型LED均匀模块可以使显示器更薄，更轻，适合背光系统应用。

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