| Presentation | 1999/3/18 Optimization of Stacks of Reflective Cholesteric Films for Full Color Displays John L. West, Vladimir Bodnar, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Researchers from Kent Displays recently demonstrated, bright, full color, reflective displays using stacks of red, green and blue reflecting cholesteric films. We examined the factors affecting the brightness of these stacked displays. We measured the reflectivity of the individual films and of two and three layer stacks. We found that the reflectivity depends on the order of the stacks, being maximized when films reflecting at shorter wavelengths are placed on top. It appears that the effect of the order of the stack results from the asymmetric reflection of films; the reflection curves have a long tail on the shorter wavelength side of the reflection maximum. This tail may result in multiple reflection, reducing the overall brightness of the display if films reflecting at longer wavelengths are place closer to the observer and the light source. We have also found that the reflectivity is maximized if the twist sense of the layers is alternated. Maximum reflection in a three-layer stack, required for full color, is produced with a blue reflecting film on top, a green reflecting film in the middle and a red reflecting film on the bottom. Reflection is also optimized when the middle green film has the opposite twist sense of the blue and red films. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Reflective cholesteric / full color display |
| Paper # | EID98-202 |
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| Conference Information | |
| Committee | EID |
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| Conference Date | 1999/3/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electronic Information Displays (EID) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optimization of Stacks of Reflective Cholesteric Films for Full Color Displays |
| Sub Title (in English) | |
| Keyword(1) | Reflective cholesteric |
| Keyword(2) | full color display |
| 1st Author's Name | John L. West |
| 1st Author's Affiliation | Liquid Crystal Institute, Kent State University() |
| 2nd Author's Name | Vladimir Bodnar |
| 2nd Author's Affiliation | Liquid Crystal Institute, Kent State University |
| Date | 1999/3/18 |
| Paper # | EID98-202 |
| Volume (vol) | vol.98 |
| Number (no) | 665 |
| Page | pp.pp.- |
| #Pages | 4 |
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