| dc.description.abstract | ABSTRACT
The long-distance teaching combines the information technology in recent years (IT) With showing the development of technology has already got generally in higher education in various kinds of social education gradually, furthering the difference of the school in urban and rural areas too, among them the demand for the video-information equipment is higher and higher, apply display device of classroom have size heavy, luminance high demand even more especially.
Whether research this design suitable long-distance teaching spend it display device, make it show device can meet the following some demand emphatically. (a)Can meet 60 display screen size that people watch at least, (b) Show the luminance of the device needs to satisfy 300 nit at least, (c) It show light source life-time of device at least it greater than on the two year,and (d) Show the stability of the device is high and cheap.
Utilize one pairs of structure, light of source among thesis this, combine DLP system with finish one apply projection of long-distance teaching show the device. Utilize two parabola light coupling become one pairs of system and simulation, light of source and prove behind the the efficiency, light of system actually at first, and then utilize E’’ tendue and geometrical optics formula to calculate out the initial structure of the lighting system, and utilize ZEMAX to optimize the lighting system again, choose the suitable projection lens and whole structure finally, this is designed and the real machine is verified to combine the lighting system and formation of image and finish systematically, operation principle of exhaustive introduction every optics component among them.
In end of thesis this, propose piece of new pairs of light source systems of structure, output efficiency on after imitating the result to analyse it have it is higher, use because should high light demand. | en_US |