Patent Application
20120069251
The present invention generally relates to a dual panel micro reflective liquid crystal projection device, and more particularly to such a projection device that provides improved projection brightness of a micro projector.
A conventional desktop projector provides visual sensation of large screen, but it is not readily portable due to its volume and weight and the need for supply of power.
The state-of-the-art micro projectors remove the constraints in relation to volume, weight, and the need for external power supply, allowing for easy portability and readily use for projection of image. However, the existing micro projectors have an inherent disadvantage in relation to insufficiency of projection brightness. This requires further improvement.
In view of the inherent disadvantage of insufficient projection brightness, the present invention, of which a more detailed description will be given with reference to an embodiment of a dual panel micro reflective liquid crystal projection device, aims to provide a modification to change the existing single panel based reflective liquid crystal projection system into a dual panel reflective liquid crystal projection without making any alteration to the conditions of operation of an existing light source and the conditions of existing light path, so that a horizontally polarized component of light that was heretofore wasted and not used is re-used to effectively double the projection brightness of a micro projector.
Thus, an objective of the present invention is to provide a dual panel micro reflective liquid crystal projection device, which comprises a set of two reflective liquid crystal panels respectively arranged at top side and right side of a polarizing beam splitter so that a light beam emitting from a light source located at the bottom side of the beam splitter is split by the beam splitter into a horizontal polarization component and a vertical polarization component, which are then respectively reflected and modulated by the two reflective panels into vertically polarized light and horizontal polarized light, with a purpose to fully use all optic energy carrying by the original light beam and also for simultaneously transmitting identical image signals to a projection system arranged at the left side of the beam splitter to thereby double the brightness of image projection.
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.
It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.
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.
