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US 7,252,390 B2Granted
Projecting optical system
AssigneeLG Electronics Inc.
InventorSeung Gyu Lee
Life of this patent
Estimating the term…
Abstract
A projecting optical system for decreasing a height of an optical system is provided. The system includes a lamp for irradiating light, a color divider for dividing colors of light irradiated from the lamp, an illumination mixer for irradiating the light with equal light intensity, a channel-changing prism for changing a channel of light irradiated from the illumination mixer to upward and downward, and a TIR prism for changing a direction and angle of light to a predetermined direction and angle.
Claims18
A projecting optical system, comprising:
- a lamp configured to irradiate light;
- a color divider configured to divide colors of light irradiated from the lamp;
- a illumination mixer configured to irradiate the light received from the color divider with equal light intensity;
- a channel-changing prism configured to receive light irradiated from the illumination mixer and to provide a predetermined distance between an axis of incidence light and an axis of light emitted by the channel-changing prism by rotating;
- a rotation device configured to rotate the channel-changing prism;
- and
- a TIR prism for changing a direction and angle of light to a predetermined direction and angle, wherein the axis of incidence light and the axis of light emitted by the channel-changing prism are substantially parallel.
4 more elements
A projecting optical system, comprising:
- a lamp configured to irradiate light;
- a illumination mixer configured to irradiate the light received from the lamp with equal light intensity;
- a channel-changing prism configured to receive light irradiated from the illumination mixer and to provide a predetermined distance between an axis of incidence light and an axis of light emitted by the channel-changing prism by rotating;
- a rotation device configured to rotate the channel-changing prism;
- and
- a prism for changing a direction and angle of light to a predetermined direction and angle, wherein the axis of incidence light and the axis of light emitted by the channel-changing prism are substantially parallel.
3 more elements
Dependencies are inferred from the claim text.