Television set projector

• US 4,215,373 A
• Filed: 10/19/1978
• Issued: 07/29/1980
• Est. Priority Date: 10/19/1978
• Status: Expired due to Term

• Current Assignee: David A. Goldenberg, Max Goldenberg
• Original Assignee: David A. Goldenberg, Max Goldenberg
• Inventors: Goldenberg, David A., Goldenberg, Max
• Primary Examiner(s): Martin, John C.
• Assistant Examiner(s): Coles, Edward L.
• Application Number:
  US05/952,688
• Time in Patent Office: 649 Days
• Field of Search: 358/231, 358/255, 358/254, 358/60, 358/237, 358/250, 353/47, 353/74, 353/75, 353/76, 353/97, 353/78, 353/98, 353/100, 353/122, 312/7 TY
• US Class Current: 348/781
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

A device for projecting and magnifying a picture image from a television set. A first housing is removably mounted to the television set to receive the picture image from the television screen. A second housing is slidably mounted to the first housing and cooperatively with the first housing forms a passage through which the picture image passes to a lens mounted at the end of the second housing. The first housing includes a light-absorbent inner surface whereas the second housing includes a light-reflective inner surface. A gear and rack device is provided for slidably adjusting the second housing relative to the first housing and controlling the ratio of the light-reflective surface to the light-absorbent surface. A barrel-configured lens is slidably mounted to the second housing for focusing of the picture image on a remotely located viewing surface which may be positioned at any one of a number of different distances from the television set and lens.

Claims

1. A device for projecting and magnifying a picture image from a screen of a television set comprising:

a light-storage housing removably mountable to said television set, said housing having a proximal end portion extending continuously and peripherally around said screen to receive all light rays emitted by said screen and defining a first tunnel extending outwardly from said screen in a straight direction;

a light-reflecting housing having a distal end portion and an inner end portion with said inner end portion slidably mounted to said storage housing and being aligned therewith, said reflecting housing defining a second tunnel extending in the same direction as said first tunnel with said first tunnel and said second tunnel cooperatively forming an obstruction-free passage for light rays emitted from said screen in said straight direction;

first means provided on said reflecting housing at said distal end portion and extending across said passage having an aperture to receive a lens and operable to allow a portion of light rays from said screen to pass through said aperture; and

an image lens mounted on said means at said aperture to magnify and project light rays pasing therethrough from said screen upon a forward viewing surface facing said lens and located remotely from said television set;

said storage housing includes a light-absorbent inner surface extending around said first tunnel to absorb at least a portion of light rays emitted from said screen in a direction other than said straight direction;

said reflecting housing includes a light-reflective inner surface extending around said second tunnel to reflect light rays through said lens.

2. The device of claim 1 and further comprising adjustment means associated with said storage housing and said reflecting housing being operable to control the ratio of the area of said light-absorbent inner surface to the area of said light-reflective inner surface present within said passage.

3. The device of claim 2 wherein said ratio is approximately 1:

1.

4. The device of claim 2 wherein said light-absorbent inner surface is black and said light-reflective inner surface is white, said area of said light-reflective inner surface present in said passage is fixed whereas said area of said light-absorbent inner surface is variable by said adjustment means.

5. The device of claim 2 wherein:

said lens includes a pair of spaced apart double convex lens, a double concave lens positioned therebetween and a barrel housing with said double convex lens and double concave lens fixedly mounted therein;

said first means slidably receives and holds said barrel-shaped housing for movement of said image lens to and from said screen to allow the device to be located at any one of a number of different distances from said viewing surface with said lens providing a focused picture thereon.

6. The device of claim 2 wherein said adjustment means includes a rack and an engaged gear cooperatively operable to slidably adjust said reflecting housing relative to said storage housing.

7. The device of claim 6 wherein said image lens has a focal length of 12 inches, an outer surface area facing said viewing surface of less than 35 square inches, an optical axis extending in said straight direction, and is located within 20 inches of said screen and said viewing within 15 feet of said viewing surface.

8. A device for projecting and magnifying a picture image from a screen of a television set comprising:

a first housing removably mountable to said television set, said housing having a proximal end portion extending continuously and peripherally around said screen to receive all light rays emitted by said screen and defining a first tunnel extending outwardly from said screen in a straight direction;

a second housing having a distal end portion and an inner end portion with said inner end portion slidably mounted to said first housing and being aligned therewith, said second housing defining a second tunnel extending in the same direction as said first tunnel with said first tunnel and said second tunnel cooperatively forming an obstruction-free passage for light rays emitted from said screen in said straight direction;

first means provided on said second housing at said distal end portion and extending across said passage having an aperture to receive a lens and operable to allow a portion of light rays from said screen to pass through said aperture; and

an image lens mounted on said means at said aperture to magnify and project light rays passing therethrough from said screen upon a forward viewing surface facing said lens and located remotely from said television set;

said first housing and said second housing including a light-reflective inner surface and a light-absorbent inner surface extending around and defining said obstruction-free passage, said light-reflective inner surface reflecting light rays from said screen with said light-absorbent inner surface absorbing at least a portion of light rays directed other than said straight direction, said first housing and said second housing being slidably adjustable to control the ratio of light-absorbent surface to light-reflective surface.