Patent Application
20130002831
The embodiments provided herein relate generally to projection television systems and infrared emitters coupled thereto and more particularly to systems and methods for an infrared emitter positioned internal to the projection television system.
Television receiver sets now available in the commercial market, including those of the projection type, have infrared (IR) emitters typically in the form of laser emitting diodes (LEDs) arrays, for generating an infrared beam or beams of a particular characteristic descriptive of a particular command to control IR controllable devices such as, for example, 3D shutter glasses. The IR emitter typically projects from a window on the front cosmetic panel of the television.
To improve the coverage area of the IR emitter, the number of LEDs in the array would need to be increased. This negatively impacts the cost and the cosmetic appearance of the television.
Accordingly, it would be desirable to provide an IR emitter with improved coverage area without increasing the complexity and cost of the system, or negatively impacting the cosmetic design of the television.
The systems and methods described herein provide for mounting an IR emitter, for example a single IR type LED or an array of IR type LEDs, behind the screen of a projection television apparatus. The LED is mounted so as not to interfere with the image display light path from the projection engine. The LED is mounted so that IR rays are reflected off the reflector mirror and exit through the screen of the projection television.
Other systems, methods, features and advantages of the invention will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description.
The details of the invention, including fabrication, structure and operation, may be gleaned in part by study of the accompanying figures, in which like reference numerals refer to like parts. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. Moreover, all illustrations are intended to convey concepts, where relative sizes, shapes and other detailed attributes may be illustrated schematically rather than literally or precisely.
The systems and methods described herein provide for mounting an IR emitter, for example a single IR type LED or an array of IR type LEDs, behind the screen of a projection television apparatus. The LED is mounted so as not to interfere with the image display light path from the projection engine. The LED is mounted so that IR rays are reflected off the reflector mirror and exit through the screen of the projection television turning in detail to the figures,
Red, blue, and green pixels are projected by the respective image projection engine or system 16 onto the reflector mirror 18, which is supported in the rear wall of the cabinet 12, and then reflected by the reflector mirror 18 towards the rear projection screen 14 whereat the pixels of three primary colors are matched together to provide a color video picture. The color video picture projected onto the rear projection screen 14 can be viewed from the front of the cabinet 12 generally in a direction counter to the direction of travel of the imagewise rays of light reflected from the reflector mirror 18.
The rear projection screen 14 used in the practice of the present embodiment is of a type comprising either a single-layered structure or a double- or multi-layered structure including a Fresnel lens plate and a diffusing or lenticular lens plate. In the single-layered structure, the Fresnel lens plate and the diffusing or lenticular lens plate are formed on respective opposite surfaces of a single substrate. In the multi-layered structure, at least the Fresnel lens plate and the diffusing or lenticular lens plate separate from the Fresnel lens plate are sandwiched or integrated together. In either case, therefore, the rear projection screen 14 can exhibit an effect or characteristic similar to an optical lens element.
As depicted in
Referring to
The control board 42 preferably comprises a microprocessor chip 44, non-volatile memory 46 and software 48 stored in the memory 46. The software 48 includes a set of instructions used to control the LED 20 and to incorporate particular commands in the IR signals to be projected onto the reflector mirror 18 and out through the screen 14.
In another embodiment depicted in
In operation, as depicted in
In the foregoing specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. For example, the reader is to understand that the specific ordering and combination of process actions shown in the process flow diagrams described herein is merely illustrative, unless otherwise stated, and the invention can be performed using different or additional process actions, or a different combination or ordering of process actions. As another example, each feature of one embodiment can be mixed and matched with other features shown in other embodiments. Features and processes known to those of ordinary skill may similarly be incorporated as desired. Additionally and obviously, features may be added or subtracted as desired. Accordingly, the invention is not to be restricted except in light of the attached claims and their equivalents.
This application claims priority to U.S. provisional patent application, Ser. No. 61/502,484, filed Jun. 29, 2011. Priority to the provisional patent application is expressly claimed, and the disclosure of the provisional application is hereby incorporated herein by reference in its entirety and for all purposes.
| Number | Date | Country | |
|---|---|---|---|
| 61502484 | Jun 2011 | US |
