The present invention generally relates to a light source system of projectors, and more particular to a light source engine for pico projectors.
A light source system for conventional large or small-medium projector comprises a hyperbolic lamp shade to focus and project diffused light. The lamp shade is bulky and cannot be applied to the light source system of pico projector. Therefore, in order to comply with the latest trend of downsized, light-weighted, and portable projectors, the lamp shade has to be improved.
Light emitting diodes (LEDs), due to the recent technology development, are highly efficient as light source. On the other hand, as green laser requires further breakthrough, integrating red, blue, green laser light is still difficult, and single laser chip package still suffers high cost and bulky dimension, LEDs remain the mainstream for light source. However, light from LEDs is more scattered and dispersed than laser light. Further, it is difficult to achieve uniform brightness when projecting image on the screen.
As such, the light source system of pico projector according to the present invention is able to concentrate light from the LEDs with about 120-degree scatter angle and project the concentrated light. This is a main feature of the present invention.
Concentrating scattered light and then projecting the light would still suffer non-uniformity as the image's center region is always brighter than the peripheral, due to inherent characteristic of light. Therefore, an LCoS (light crystal on silicon) panel is adopted to achieve uniform and bright images. This is another main feature of the present invention.
The present invention provides a light source system of pico projector, which is composed of a light-emitting diode module, collimators, a lens array, magnification lenses, and an LCoS (light crystal on silicon) panel, arranged in sequence with appropriate spacing in-between, wherein the light-emitting diode module, as the light source, emits red, green, and blue lights.
The present invention provides a light source system of pico projector, which is composed of a light-emitting diode module, collimators, a lens array, magnification lenses, and an LCoS (light crystal on silicon) panel, arranged in sequence with appropriate spacing in-between, wherein the collimators, in a front-back sequential arrangement with appropriate spacing, convert light from the light-emitting diode module into collimated light.
The present invention provides a light source system of pico projector, which is composed of a light-emitting diode module, collimators, a lens array, magnification lenses, and an LCoS (light crystal on silicon) panel, arranged in sequence with appropriate spacing in-between, wherein the lens array homogenizes the collimated light.
The present invention provides a light source system of pico projector, which is composed of a light-emitting diode module, collimators, a lens array, magnification lenses, and an LCoS (light crystal on silicon) panel, arranged in sequence with appropriate spacing in-between, wherein the magnification lenses, in a front-back arrangement with appropriate spacing, magnify the homogenized light from the lens array with a predetermined ratio onto the LCoS panel.
The present invention provides a light source system of pico projector, which is composed of a light-emitting diode module, collimators, a lens array, magnification lenses, and an LCoS (light crystal on silicon) panel, arranged in sequence with appropriate spacing in-between, wherein the LCoS panel reflects and modulates the light to form an optic signal to be projected to a screen.
The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
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While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.