We developed a 0.61'' diagonal OLED microdisplay dedicated to electronic viewfinders for digital vision systems, e.g. for security or other professional applications. The microdisplay has a very high resolution of 5.4 million subpixels and combines excellent image quality with low power consumption and a 10bit per color digital input. Subpixel pitch is 4.7x4.7µm². Thanks to the versatile architecture of the underlying ASIC circuit, the device can be easily adapted to different applications and image formats: In the standard full color version, the resulting resolution is 1300 by 1044 pixels (SXGA). In a monochrome version, the resolution is 2600 by 2088 independent pixels, enabling e.g. digital night vision at full 2K by 2K resolution. In addition to this, we developed two-and three color versions of the display that allow to merge high resolution monochrome images e.g.in 2K by 2K resolution with lower resolution images e.g., from an infrared sensor for image fusion or for adding colored graphical overlays.
The optical efficiency of a single-LCD projector can be improved by "spatio-chromatic illumination" method. It consists of an angular separation of the three primary colors combined with a focusing of each color in the corresponding pixel by a microlens array. To perform the spatio-chromatic illumination we present two inovative systems based on volume holographic components. The dispersion property of these components realizes the angular separation of the primary colors, the focusing being performed either by classical or holographic microlenses. A complete luminous efficiency analysis of spatio-chromatic illumination with volume holographic elements is reported. The luminous flux analysis will take into account étendue limitation considerations. Experimental results will be given for a prototype of single-LCD pmjector using a volume holographic grating. SPIE Vol. 3013 • 0277-786X/971$l0.00 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/20/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx
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