| Project/Area Number |
16560290
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
MIYASHITA Tetsuya Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (10239402)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | ELECTRONIC DEVICES EQUIPMENTS / DEVICE DESIGN MANUFACTURING PROCESS / DISPLAY / 3 DIMENSION / LIQUID CRYSTAL / CONTOL OF LIGHT DIRECTION IN TIME SHARING / BACKLIGHT / STEREOSCOPIC IMAGE / 三次元ディスプレイ / 立体画像ディスプレイ / 液晶ディスプレイ |
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| Research Abstract |
We proposed a three-dimensional display system consisted with a high-speed liquid crystal display panel and a time-sharing light-direction control backlight. Displayed images on LCD corresponding with multi-view are changed sequentially in a high-speed and the light direction from a backlight are changed in synchronize with the displayed image. This system has merits that the displayed image shows the same high resolution as the display panel and that the structure can be simple.
The subject for the switching speed of the LC panel is common in researches about a field sequential color LCD. From the results, the 3D display with 6 view can be realized using current available LC materials.
The backlight for this system is discussed focusing on the light efficiency. The optimized design was performed for lenticular-lens system and for parallax-barrier system respectively with reflected type polarizer to obtain high luminosity. The lenticular-lens system shows 7 times higher light efficiency than the parallax-barrier system by the result and the lenticular-lens system is adopted for this backlight.
A liquid crystal prism is used for a device which control the light direction easily and in high efficiency. A backlight with a micro-shape prism-sheet and the LC prism-array is newly devised and the design rule is established. It is confirmed by trial fabrication that the device can work in a high speed by newly designed special driving scheme of liquid crystal in both on- and off-case.
However, it is clarified that the usage of the intermediate state of liquid-crystal response is difficult in high-speed operation. In conclusion, the three-dimensional LCD using the time-sharing light-direction control backlight system is shown as a practical display and fundamental design theory is discussed and the validity is clarified successfully as mentioned above.
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