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US 7,396,130 B2Granted
Optical system, image projection apparatus and method thereof
AssigneeHimax Technologies Limited
InventorsYen-Chen Chen, Kuo-Yuin Li
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Abstract
An image projection apparatus. The image projection apparatus comprises a light source and LCD panel. The LCD panel comprises a plurality of pixels and color filters thereon. Light from the light source is projected to the pixels along an irradiative path and the LCD panel selectively reflects the projected light in accordance with an image signal along a projective path, wherein an angle between the irradiative and projective paths exceeds 0°.
Claims13
An image projection apparatus comprising:
- a light source;
- a liquid crystal on silicon (LCOS) panel with a color filter;
- and
- a hologram disposed between the light source and the LCOS panel, wherein light from the light source is irradiated to the hologram along an irradiative path and there through to the LCOS panel, the irradiative path is perpendicular to the hologram, and thereby light is irradiated to the hologram at a 90° angle, the LCOS panel then selectively reflecting the light to the hologram in accordance with an image signal and the light passing the hologram projecting along a projective path, such that an angle between the irradiative path and the projective path exceeds 0°.
1 more element
An image projection method comprising:
- irradiating light to a hologram along an irradiative path, wherein the irradiative path is perpendicular to the hologram, and thereby light is irradiated to the hologram at a 90° angle;
- polarizing the light irradiated to the hologram;
- focusing the light along the irradiative path before polarization by a condensing lens;
- irradiating light passing the hologram to a reflective liquid crystal light valve including a color filter;
- reflecting light irradiated to the liquid crystal light valve selectively to the hologram in accordance with an image signal;
- and
- projecting the light passing the hologram along a projective path, wherein an angle between the irradiative path and the projective path exceeds 0°.
4 more elements
Dependencies are inferred from the claim text.