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US 2006/0077664 A1Published application
Light blocking apparatus
AssigneeCoretronic Corporation
InventorCheng Wang
Life of this patent
Estimating the term…
Abstract
A light blocking apparatus is applied in an illuminating module of a projector. The light blocking apparatus includes a light shield and a support rod securing the light shield. The light shield is positioned in front of a bulb of the illuminating module. The support rod connects the light shield and another apparatus, such as a lamp reflector, so as to position the light shield in front of the bulb. The light shield is employed to block the light reflected from a UV-IR wheel and a color wheel so that the bulb won't be heated again.
Claims20
A light blocking apparatus comprising:
- a light shield, disposed in front of a projector bulb in a reflective lampshade and in an optical axis ineffective region of the projector bulb to block light reflected toward the projector bulb right in front of the projector bulb;
- and
- a support rod, being at the rim of the light shield to fix the light shield in front of the projector bulb.
A projector illuminating module comprising:
- a reflective lampshade, having an opening;
- a projector bulb, disposed inside the reflective lampshade, wherein the light emitted by the projector bulb is collected by the reflective lampshade and projected out via the opening;
- a light blocking apparatus, disposed in front of the projector bulb and comprising:
- a light shield disposed in front of the projector bulb;
- and
- a support rod disposed at the rim of the light shield to fix the light shield in front of the projector bulb;
- a filter disposed in front of the light blocking apparatus;
- and
- a color wheel disposed in front of the filter, wherein the filter and the color wheel filters the light emitted out from the reflective lampshade toward an optical engine, and the light shield blocks the light reflected by the filter and the color wheel back to the projector bulb.
6 more elements
Dependencies are inferred from the claim text.