Optical system of a liquid crystal projector for reducing total length of the system
AssigneeLG Electronics Inc.
InventorMan Ho Na
Life of this patent
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Abstract
Optical system of a liquid crystal projector with three reflective liquid crystal displays, wherein a first light path changing part among first to third light path changing parts is designed such that a first color path surrounds three faces of a first of liquid crystal panel except a side of a connector thereof, for avoiding interference of the color light path with the connector, thereby reducing a total length of the optical system.
Claims15
An optical system of a liquid crystal projector for superimposing, enlarging, and projecting pictures displayed on first to third liquid crystal panels by using color lights received through first to third light path changing parts, the first light path changing part comprising:
- a first sub-light path part for making a first time alteration of a linearly polarized light component of the color light received from one of the first to third light path changing parts;
- a second sub-light path part for reflecting the color light from the first sub-light path part, and making a second alteration of the linearly polarized component of a reflected color light, and forwarding to the first sub-light path part;
- and,
- a third sub-light path part for directing the color light received through the second sub-light path part and the first sub-light path part to the first liquid crystal panel relevant to the color light,
- wherein the first to third sub-light path parts are arranged spaced away from the first liquid crystal panel, on sides of the first liquid crystal panel respectively except a side the connector is fitted thereto.
An optical system of a liquid crystal projector for superimposing, enlarging, and projecting pictures displayed on first to third liquid crystal panels comprising:
- a light source;
- an illuminating part for altering a white light from the light source to a linearly polarized light, and forwarding the linearly polarized light;
- a color separating part for separating the white color from the illuminating part into first to third color lights;
- a third light path changing part for reflecting the three color lights to the third liquid crystal panel;
- a second light path changing part for reflecting two color lights received through the third light path changing part to the second liquid crystal panel;
- and,
- a first light path changing part including;
- a first sub-light path part for making a first time alteration of a linearly polarized light component of the first color light received from the second light path changing part,
- a second sub-light path part for reflecting the first color light from the first sublight path part, and making a second alteration of the linearly polarized component of a reflected first color light, and forwarding to the first sub-light path part, and
- a third sub-light path part for directing the first color light received through the second sub-light path part and the first sub-light path part to the first liquid crystal panel,
- wherein the first to third sub-light path parts are arranged spaced away from the first liquid crystal panel, on sides of the first liquid crystal panel respectively except a side the connector is fitted thereto.
Dependencies are inferred from the claim text.