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US 6,552,754 B1Granted
Laser video projector using optical pumping valve
AssigneeSamsung Display Devices Co., Ltd.
InventorsChung Dam Song, Sang Mook Kim
Life of this patent
Estimating the term…
Abstract
A laser video projector using an optical pumping valve is provided. The video projector according to the present invention forms an image using an optical pumping valve including a laser resonator for resonating light of a certain wavelength, an optical pumping source for performing pumping so that the laser resonator can generate a laser beam, and an optical valve for filtering the laser beam emitted from the laser resonator so that the filtered laser beam forms a picture instead of a cathode ray tube (CRT).
Claims28
A laser video projector, comprising:
- three optical pumping valves arranged in line;
- mirrors installed downstream of the two outer optical pumping valves for reflecting light beams generated by the outer optical pumping valves towards an optical path of a light beam generated by the central optical pumping valve;
- a color prism installed downstream of the central optical pumping valve and on said optical path for directly transmitting the light beam of the central optical pumping valve and for reflecting the light beams reflected from the mirrors to travel along said optical path;
- and
- at least one projection lens group installed downstream of the color prism on said optical path for projecting the light beams from the three optical pumping valves onto a screen;
- wherein the mirrors are curved mirrors for preventing edges of an image formed by the light beams from being distorted.
3 more elements
A laser video projector, comprising:
- at least first and second optical pumping valves for generating first and second light beams along first and second straight light paths, respectively;
- a curved mirror installed downstream of the second optical pumping valves and on the second light path for reflecting the second light beam toward the first light path;
- a prism installed downstream of the first optical pumping valve and on the first light path for transmitting the first light beam and for reflecting the second light beam reflected from the mirror so that the second light beam continues to travel along the first light path;
- and
- at least one projection lens installed downstream of the prism on the first light path for projecting the first and second light beams onto a screen;
- wherein the curved mirror has a predetermined curvature for preventing edges of an image formed by the first and second light beams from being distorted.
3 more elements
Dependencies are inferred from the claim text.