Selviah, D.R.;
Wang, K.;
(2004)
Modelling of a colour-separating backlight with internal mirrors.
Presented at: Society for Information Display's 2004 International Symposium, Seminar, and Exhibition, Seattle, USA.
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Abstract
Liquid Crystal Displays (LCDs) require an advanced illumination system to give high contrast and power efficiency. The aim is to design a power efficient backlight which collimates light rays normal to the display. Non-sequential ray trace modelling is a potential tool for the design of the total internal reflection (TIR) backlight. Light emitted from red, green and blue chip LEDs enters the multimode lightguide emerging at periodic grating coupler "windows“ but some light is lost out of the bottom of the guide. An array of micro-mirrors within the guide compensates for this loss. Our model allows us to optimize the distance of the micro-mirrors from the grating windows, the mirror size and guide dimensions to give improved optical uniformity and efficiency.
| Type: | Poster |
|---|---|
| Title: | Modelling of a colour-separating backlight with internal mirrors |
| Event: | Society for Information Display's 2004 International Symposium, Seminar, and Exhibition |
| Location: | Seattle, USA |
| Dates: | 25-27 May 2004 |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/2842 |
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