液晶显示激光背光模组关键技术研究

发布时间：2018-12-15 11:55

【摘要】：以红、绿、蓝三色混光而成的白光激光光源,具有色域覆盖广、色彩饱和度高、亮度高、能损低、寿命长等等优点,正在显示技术中引领着新一轮革命——“full-color”显示。作为显示技术的终端,液晶显示器具有体积小、重量轻、功耗低、轻便易携带等等优点,已经取代阴极射线显像管显示器,成为当今主流显示器。近年来,在激光显示领域,众多科研工作者针对投影显示技术做了大量工作,取得了辉煌的成果,然而,关于激光液晶显示技术的研究还是很少。激光液晶显示器,结合了激光显示和液晶显示的优点,不仅有重要的学术研究空间和价值,还有巨大的市场商用前景。本文针对液晶显示器激光背光模组的一些关键技术开展了一系列研究,具体如下:1、针对激光光源模块的研究。将红、绿、蓝三色激光经光纤耦合混合输出白光激光可应用于液晶显示器。由于普通光纤耦合模块是光纤端面发光,每个模块只能发射一束激光,每个显示器需要多个发光点,这就需要多个模块,增加了系统复杂程度和成本。本文设计并研究了对光纤侧面加工使光纤侧面发光的方法,使一个光纤耦合模块可具有多个发光点。模拟分析了对光纤侧面加工的不同孔深、孔面积、孔几何结构等参数对出光光场的影响,得到了各个出光点对应光场照度最大值在5%均齐度范围内的均齐光场。2、针对激光散斑抑制技术的研究。由于激光本身的干涉性,激光光源的散斑效应会严重影响显示质量,解决这个问题,是使激光液晶显示技术成熟与市场化的前提条件,具有十分重大的意义。本文针对半导体激光器作为背光源的液晶显示器背光模组,应用TN型E7液晶构建了抑制散斑装置,探索了频率与电压对散斑抑制效应的影响,将散斑对比度由6.52%降到了2.80%,低于4%,无法被人眼察觉。
[Abstract]:White laser light source, which is composed of red, green and blue, has the advantages of wide color coverage, high color saturation, high brightness, low energy loss, long life and so on. It is leading a new revolution in display technology-"full-color" display. As the terminal of display technology, LCD has the advantages of small volume, light weight, low power consumption, portability and so on. It has replaced the CRT display and become the mainstream display. In recent years, in the field of laser display, many researchers have done a lot of work on projection display technology, and achieved brilliant results. However, the research on laser liquid crystal display technology is still few. Laser liquid crystal display (LCDs), which combines the advantages of laser display and liquid crystal display, not only has important academic research space and value, but also has a huge market prospect. In this paper, some key technologies of laser backlight module of liquid crystal display (LCD) are studied, as follows: 1, the research of laser light source module. The red, green and blue laser can be used in liquid crystal display. Because the optical fiber coupling module is optical fiber end luminous, each module can only emit one laser beam, each display needs more than one luminous point, which requires multiple modules, which increases the complexity and cost of the system. In this paper, we design and study the method of making optical fiber flank luminous, so that a fiber coupling module can have multiple luminescence points. The effects of different hole depth, hole area and hole geometry on the light field are simulated and analyzed. The homogenous light field corresponding to the maximum illuminance of each light point in the range of 5% homogeneity is obtained. Research on laser speckle suppression technology. Because of the interference of laser, the speckle effect of laser light source will seriously affect the quality of display. To solve this problem, it is the precondition to make laser liquid crystal display technology mature and market-oriented, which is of great significance. In this paper, a speckle suppression device based on TN E7 liquid crystal has been constructed for LCD backlight module with semiconductor laser as backlight source. The influence of frequency and voltage on speckle suppression effect has been explored. The speckle contrast was reduced from 6.52% to 2.80.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN873.93

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