固体光源在实际应用中的局限

Restriction of Solid Lighting Sources in Practical Application

我们对作为照明源的FED、EL、LED和OLED等固体发光器件的量子效率和能量转化效率进行了量化计算,固体发光器件所发射的光子数量与注入固体器件发光层的电子数量成比例关系,由于固体发光器件并非由超导材料制成,因此不可避免的会出现焦耳热而限制其应用范围。用每平方米330单位烛光(CD)的亮度照明25平方米的房间,我们计算了平板LED的最大尺寸和运行条件,如果平板LED采用适当的帧扫描频率运行,就可能照亮屋子和办公室的房间,但是,运行器件所产生的焦耳热限制了对于一定照度水平要求的应用区域。

We have quantitatively calculated the quantum efficiencies and the energy conversion efficiencies of light source,such as FED,EL,LED,and OLED solid emissive devices.The number of the emitted photons from the solid emissive devices is directly proportionate to the number of the injected electrons to the emissive layer in the solid devices.Since the solid emissive devices are not produced by the superconductors;the devices inevitably have the Joule heat that restricts the application areas.The size of the maximized LED panel and operation conditions,which illuminate the 25 m2 room with luminance of the 330 cd/m2,are calculated.The LED panels may illuminate the rooms of houses and office with the acceptable luminance,if the LED panels are operated with the field scan with an appropriate frequency to same degree.However,the Joule heat of the operating devices restricts the application areas with the illuminance level.