HIGH EFFICIENCY COMPACT OLED MICRODISPLAY PROJECTION ENGINE
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United States of America Patent
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Issued Date -
May 7, 2009
app pub date -
Nov 3, 2008
filing date -
Nov 2, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A compact micro-display engine having improved efficiency for, e.g., projection displays or personal displays. It includes an emissive micro-display without the need for external illumination, a collimation optic plate on top of micro-display and a low F/# projection optics after the collimation optic plate. The collimation optical plate may be a micro-structure lenses array or a collimation prism film, and is used to collimate wide divergent light from the emissive micro-display device into a small cone angle light which will be efficiently collected by the projection optics. A reflective mirror is deposited on the top of substrate and underneath the light emitting layer for recycling the reflected back light from the collimation optic plate. The compact micro-display projection engine controls the divergence angle of the emitted light, and provides the controlled light to the objective plane of a projection optics subsystem.
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