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基于二次电子发射的场致发射显示器 (HOPFED)是一种新型的场致发射器件。其新颖之处在于其独特的支撑形状 ,这种结构的优点是充分提高了场致发射显示的性能 ,如对比度、色纯及像素内的发光均匀性 ,并减少了离子轰击发射源。在目前已有的结构中 ,环形的屏上光点不能使荧光粉得到充分的利用 ,而且光点尺寸较小 ,容易使荧光粉达到饱和。为了得到符合荧光粉要求的光点形状 ,本文提出了diabolo形状flu支撑、ZEUs形状hop支撑以及长flu支撑三种支撑形状 ,并采用数值计算的方法对这几种不同的支撑结构对屏上光点的影响进行了模拟计算。计算结果表明 ,对这三种不同的支撑形状进行优化以后都能得到符合荧光粉的要求的屏上光点。在现有的工艺条件下 ,长flu支撑是一种能改善光点和场强分布 ,而又易于制作的支撑结构。
Field emission display based on secondary electron emission (HOPFED) is a new type of field emission device. Its novelty lies in its unique support shape. This structure has the advantage of substantially enhancing the performance of field emission display, such as contrast, color purity and uniformity of light emission in the pixel, and reduction of ion bombardment of the emission source. In the existing structure, the annular screen spot can not make full use of the phosphor, and the spot size smaller, easy to make the phosphor saturated. In order to obtain the shape of the spot that meets the requirement of the phosphor, three kinds of support shapes, diabolo flu support, ZEUs shape hop support and long flu support, are proposed in this paper. The impact of points was simulated. The calculated results show that the three different support shapes are optimized to obtain the on-screen light spot that meets the requirements of the phosphor. Under the current process conditions, the long flu support is a support structure that can improve the distribution of light spots and field intensity, and is easy to manufacture.