A multimedia projector (110) employing a color wheel (120) uses a light guide (152) to transmit light from the color wheel to a photo detector (156) that detects a particular color or colors of light to provide a index mark signal to a display controller (56) to synchronize red, green, and blue image data with the associated color wheel filter segments. An integrator tunnel (122) adjacent to the light guide provides uniform, high intensity light from the color wheel to a display device, such as a DMD (130). The photo detector senses otherwise wasted light rays as sensing rays (150) that are reflected by a light source reflector (114) and propagated through the color wheel. To collect some of the sensing rays, the light guide is preferably bonded to the integrator tunnel. The light guide has a slanted output end (154) that reflects the collected sensing rays toward a photo detector on a circuit board (148). Because the light guide is bonded to the integrator tunnel, and because the color wheel rotates its filter segments from the light guide toward the integrator tunnel, the photo detector senses color changes slightly before they are received by the DMD, which is advantageous because the resulting predictive timing is consistent from one projector to the next, thereby eliminating timing adjustments.
Please note there is up to 60 days of latency in this Status indicator for certain status conditions. You can obtain up-to-date Status indicator readings by ordering PAIR for the file.
An application with the status "Published" (which means it is pending) may be recently abandoned, but not yet updated to reflect its abandoned status. However, an application filed less than one year ago is unlikely to be abandoned.
A patent with the status "Granted" may be recently expired, but not yet updated to reflect its expired status. However, it is highly unlikely a patent less than 3.5 years old would be expired.
An application with the status "Abandoned" is almost always current, but there is a small chance it was recently revived and the status not yet updated.
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before relying on this date.