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Abstract
澳洲电光学科技应用论文 We use the Six evaporating technology in the vertical-aligned layer process, and the contrast ratio compared to TN mode panel will be enhanced. We assembled the 65” 1080P Locos RPTV using CPT-made panel and optical engine. The contrast ratio of CPT prototype Locos RPTV is over 3000􁧶1.

1.Introduction
Both organic and inorganic layers have been applied for alignment layer in liquid crystal (LC). In 1970s’, the evaporating SiO2 alignment technology was first developed for LC alignment, but with the trend of substrates size becoming larger, the process becomes more inconvenient and expensive due to the need for larger vacuum equipment. Besides, the coincidence of evaporating direction suffers from the trial because of the large substrates. Now, the process of manufacturing for the TFTLCD industry needs quality and yield capacity, therefore, polyimide-rubbing technology is the compromise.
The Liquid Crystal on Silicon Rear Projection Television (Locos RPTV) uses polarization-based light engines with three - panel architecture, to make the high performance projection display system. Since the panel is worked under the blaze and about 60 􀴒 high temperatures, the materialism each part of the panel have to avoid damage as much as possible. Therefore, the reliability of Locos panel is very important.
In Locos, the panel works under adverse circumstances, and ages with time. However, the inorganic thin film, Six, can resist the high temperature and the blaze caused by lamp. Others, the substrates that we use are8 inch in diameter, so the coincidence of evaporating direction and uniformity is acceptable. Furthermore, this evaporating technology produces excellent alignment with high contrast ratio and sharp threshold.
The contrast between on and off states, is one of the most important performance specifications of a projection system. It influences the number of true gray levels and the color fidelity. The factors affecting the contrast ratio include the twist angle of liquid crystal and operating voltage. The contrast ratio of the reflective twist nomadic (TN) panel is poor because the prettily angle of LC allows light to leak in dark state. The vertical alignment (VA) mode provides an excellent dark state, so we can get high contrast ratio. The VA mode liquid crystal with inorganic alignment layer applied to Locos panels can reach high contrast ratio and great reliability. Therefore, we chose inorganic six thin films as alignment layer in Locos panel.

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