Adjusting device for optical system of rear projection television
Inactive Publication Date: 2006-05-04
CORETRONIC
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Benefits of technology
[0008] Another object of the present invention is to provide a simply structured and low-cost adjusting device for an optical system of a rear projection television.
[0009] Still another object of the present invention is to provide an adjusting device for an optical system of a rear projection television, capable of preventing the torsion from influencing the adjustment function.
[0012] According to the adjusting device for an optical system of a rear projection television of the present invention, the reflecting angle of the optical system is simply adjusted through the assembly of a few components. Not only the time for assembly, adjustment and maintenance is reduced, but also the production cost is relatively lowered. Furthermore, the use of the pivoting element replaces single-point-contacting ball bearing can also prevent torsion from influencing the adjusting device. In addition, through the combination of two positioning elements and a pivoting element, three directional synchronous rotations do not happen to the optical system to avoid the interference on the adjustment operation.
Problems solved by technology
The production cost of the conventional projection-adjusting device 1 is rather expensive owing to large numbers of the constituting components, and much more time must be spent to process the assembly among the components.
This increases the difficulty on the adjustment and reduces the good product ratio.
Method used
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Embodiment Construction
[0025] Before the detailed description of the present invention is done, it must be noticed that same components is expressed with same component numbers in the following description.
[0026] Please refer to FIG. 3. In a preferred embodiment according to the present invention, an adjusting device 400 for adjusting a reflecting angle of an optical system 34 is installed in a television housing 31 of a rear projection television 3. However, application range thereof comprising other different occasions such as the level positioning and the perpendicular positioning of a measurement instrument such as a spirit level (not shown in the figure) cannot be disclosed one by one in the description; a person skilled in the art without doubt has no problem to apply it in the similar condition. The rear projection television 3 comprises the television housing 31, a light source 33 installed in the housing 31, the optical system 34 installed in the housing 31 and a television screen 35 inlayed on ...
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An adjusting device of a rear projection television comprises a supporting seat, a first supporting frame, a pivoting element pivoted on the fist supporting frame, a second supporting frame and an adjusting unit. The first supporting frame is combined on the supporting seat and includes a through first screw hole and a through second screw hole. The second supporting frame and the first supporting frame are disposed at intervals and pivotally connected on the pivoting element. The second supporting frame is rotated relatively to the first supporting frame and is unparallel to first and second rotating directions. The adjusting unit comprises a first positioning element and a second positioning element; the first and the second positioning elements are respectively through the first screw hole and the second screw hole to attach on the second supporting frame.
Description
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an adjusting device, and more particularly to a device for adjusting an angle of an optical system of a rear projection television. [0003] 2. Description of Related Art [0004] The main principle of a rear projection television such as a CRT-based rear projection television or a microdisplay-based rear projection television is to enlarge a projecting beam through an optical system to project an image on a screen of the television. Therefore, the optical system in the television must be assembled accurately so that images projected on the screen of the television are not deformed and the quality and clearness of the images are maintained. [0005] For allowing the fine adjustment to be processed on the projection device under a situation that images are aberrant on the rear projection television to maintain the relative position between each optical elements and a projection angle, such ...
Claims
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Login to View More IPC IPC(8): A47F5/00G03B21/54G03B29/00
CPCG03B21/54H04N9/3141
InventorTSENG, YUNG-CHUAN
OwnerCORETRONIC