投影仪的分类以及分类的工作原理.ppt

1、投影仪的分类以及分类的工作原理,何謂投影機? LCD V.S. DLP 投影機光學元件簡介 機構設計注意事項,Illumination,Imager,Projection Lens,Screen,A,A,何謂投影機?,PANEL (LCD, LCoS, DLP等等) 照明系統 (燈泡, 濾光片, 鏡片等等) 成像系統 (投影鏡頭, 螢幕等等),投影機的組成要素,軟片 (電影放映機) - 穿透式 LCD (Epson, Sony) - 穿透式 LCoS (Philips, Aurora, Three-Five, etc.) - 反射式 DMD (TI 德州儀器) - 反射式,PANEL,Volt

2、age On,Voltage Off,Liquid Crystal,Liquid Crystal,Polarizer,Polarizer,Polarizer,Polarizer,Incident light,LCD (Liquid Crystal Display),Voltage On,Voltage Off,PBS,Liquid Crystal,Liquid Crystal,LCoS (Liquid Crystal on Silicon),LCD,LCoS,LCD & LCOS can control the transmittance/reflectance to display diff

3、erent intensity on each pixel.,LCD與LCoS控制亮度的方法,On State,Flat State,Illumination,24,+/- 12 Tilt,Pixel,投影機鏡頭,Off State,DMD (Digital Micro-mirror Device),人眼無法分辨小於1/30秒的畫面,DMD時間分割控制亮度,拋物面反射罩,橢圓面反射罩,平行光,聚焦光,LCD & LCoS,DMD,燈泡的型式,Microdisplay Panel LCD or LCoS,Microdisplay Panel DMD,Parabolic reflector,Ell

4、iptical reflector,Lens Array,PCS,照明系統,Dichroic mirror,X-cube: for combining RGB light.,Parabolic reflector,Lens array,PCS,LCD,LCD合光系統,1/2 波板,光線旋轉90度,極化鍍膜,偏極化光,非極化光,PCS (Polarization Conversion System),色輪製造出顏色,經過色輪後,紅藍綠分別照向DMD,人眼看到的是黃色,藍色被DMD反射出去,DMD,DMD時間分割製造顏色,Reflection Diffuser,前投影系統,Good brightn

5、ess uniformity,背投影系統,Screen,Fresnel Lens,Lenticular Lens,Projection Light,Projection Lens,Projector,Projection Screen,Mirror,Mirror,Fresnel Lens,Projector,Focal Length,Lenticular Lens,Fresnel Lens,Lenticular Lens,Lumen: Power unit (total light throughput of the engine) Lux: Intensity unit (lumen per square meter area) Nit: Intensity unit,Throw ratio: Throw distance over imag