Optical: systems and elements – Mirror – With support
Reexamination Certificate
2000-01-11
2001-12-11
Spyrou, Cassandra (Department: 2872)
Optical: systems and elements
Mirror
With support
C359S847000
Reexamination Certificate
active
06328452
ABSTRACT:
CLAIM OF PRIORITY
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from my application SECURING STRUCTURE FOR HALF MIRROR OF 3-DIMENSION MONITOR filed with the Korean Industrial Property Office on May 1, 1999 and there duly assigned Ser. No. 15766/1999.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a 3D monitor, specifically to securing a frame of a half mirror which can control and maintain the angle of the half mirror of a 3D monitor.
2. Description of the Related Art
Generally, a 3D monitor is a device enabling people to view a 3D image using the difference between the images seen from right and left eyes respectively. Such a 3D monitor can be classified into two types, one using eyeglasses and the other being a lenticular type. The type involving eyeglasses can in turn be classified into types using polaroid glasses, LCD shutter glasses or ones using the principles of anaglyphs. However, wearing glasses to view 3D images is cumbersome for most people.
As for lenticular type, it can be classified into a direct vision type where lenticular lens sheets are placed on the surfaces of display devices such as a CRT or LCD, and projecting type where a projectors are used to project images on the lenticular lens sheet. Generally, half mirrors are installed in the lenticular type to transmit images.
An earlier 3D monitor comprises a first image display device installed on a lower portion of a case, a second image display device installed on the back of the case so as to be perpendicular to the first image display device, a half mirror forming a fort-five degree angle between the first and second image display device and a pair of securing frames supporting the half mirror.
The securing frames are installed on both sides of the case in a diagonal direction. Upper and lower end portions of the securing frames are locked onto the case by means of securing bolts. The securing frames are long and rectangular. A pair of engaging protrusions are formed on the inner sides of the securing frames, forming engaging grooves. Therefore, both ends of the half mirror are respectively inserted in the engaging grooves of the securing frames.
A pair of end caps are placed on the respective ends of the securing frames. Engaging grooves are respectively formed on the inner side of the end caps. Therefore, the half mirror inserted into the engaging grooves of the securing frames are secured by the end caps and at lower and upper ends.
However, when the half mirrors tilts away from the predetermined forty-five degree angle due to vibrations or external forces, it is difficult to correct the deviation. Also, since a gap of a predetermined length is formed between the engaging grooves of the securing frames and the half mirror, images can quiver when vibrations occur.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a securing frame used in a 3D monitor which can prevent the half miffor from quivering due to vibrations by securing the half mirror tightly, while facilitating the correction when deviations occur in the half mirror.
The above and other objects, advantages and features of the present invention will become more readily appreciated and understood from a consideration of the following detailed description of a preferred embodiment of this invention when taken together with the accompanying drawings.
In order to achieve above objects, the present invention provides a securing structure of a half mirror of a 3D monitor comprising: a box shaped case where the half mirror is installed in a diagonal direction; a pair of upper frames installed at both sides of the case in a diagonal direction, having protruding portions at the lower tilt surface thereof, said protruding portions curved inward to form pressing portions exerting force on upper portions of the half mirror resiliently, upper end portions thereof fixed to an upper portion of the case in a rotating manner, lower end portions having a first through hole, a first control screw penetrating the first hole and engaging a lower portion of the case so that it can rotate clockwise and counterclockwise for a predetermined angle; a first curved portion curved toward in a downward direction perpendicularly to support lower end surfaces of the half mirror; a pair of lower frames onto which the lower portion of the upper frames are installed, having protruding portions on the upper tilt surface, the protruding portions curved inward to form supporting portions supporting lower portions of the half mirror resiliently, the upper ends secured to the upper portions of the case, the lower end portions having a second through hole, a second control screw penetrating the second hole and engaging the lower portion of the case so that it can rotate clockwise and counterclockwise for a predetermined angle; the upper ends of the lower frames being curved in a upward direction forming second curved portions supporting the upper end surface of the half mirror, and the half mirror being secured resiliently between the pressing portions and supporting portions.
According to one aspect of the present invention, said first hole has an identical radius of curvature to that of a rotational trajectory of the upper frame, and said second hole has an identical radius of curvature to that of a rotational trajectory of the lower frame, in order to control the angle of of the securing frames, releasing the first and second control screws and then rotating the upper and lower frame in clockwise and counterclockwise directions and then securing the first and second control screws.
REFERENCES:
patent: 1152156 (1915-08-01), Falk
patent: 1782175 (1930-11-01), Pearmain
patent: 3998530 (1976-12-01), Kaschak
patent: 4331402 (1982-05-01), Nihei
patent: 5959791 (1999-09-01), Bagnato, III
patent: 6003999 (1999-12-01), Kitaoka et al.
Kim Sang-Woo
Lee Jung-Hyun
Bushnell , Esq. Robert E.
Cherry Euncha
Samsung Electronics Co,. Ltd.
Spyrou Cassandra
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