Patents by Inventor Yong-Hwan Choi

Yong-Hwan Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6065680
    Abstract: A card receptor for use in an internet set-top box is provided with a pivotable door, a card carrier with card/disk insertion slots to receive and to keep a card/disk therein through the card/disk insertion slots and a driving mechanism. The card carrier moves toward an inside position wherein the card/disk insertion slots stay within a housing of the internet set-top box, with the pivotable door being closed by the driving mechanism, and toward an outside position wherein the card/disk insertion slots stay outside a front panel through an opening of the housing, with the pivotable door being opened by the loading mechanism.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: May 23, 2000
    Assignee: Daewood Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5952979
    Abstract: An apparatus for positioning a parabolic antenna includes a support member for supporting the parabolic antenna, a housing having a pair of frames assembled together for accommodating the support member, a first device for providing tilting movement in the parabolic antenna, and a second device for providing rotational movement in the parabolic antenna in sidewise directions, thereby providing tilting movements in the parabolic antenna and rotational movements therein in sidewise directions.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: September 14, 1999
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5874925
    Abstract: A parabolic antenna provided with a reflector and an arm comprises a housing fixed to a free end of the arm, a case enclosing a low noise blockdown converter ("LNB"), a feed horn protruding from a front side of the LNB case and a driving and a driven gears for adjusting an elevation angle of the feed horn. The LNB case has a pair of hinge pins. The housing has a pair of supporting members which are spaced from each other and provided with a pair of apertures into which the hinge pins of the LNB case are snugly fitted, respectively. The driven gear is engaged on one of the hinge pins of the LNB case and the driving gear is engaged on an input shaft. The input shaft rotatably passes through one of the supporting members, the driving gear and the driven gear being meshed with each other and, in turn, rotated with the input shaft, thereby allowing the elevation angle of the feed horn can be adjusted by rotating the input shaft.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: February 23, 1999
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5826176
    Abstract: A card receptor for use in a satellite broadcasting tuner includes a housing having a case slot, a door rotatably mounted to the housing, for opening and closing the case slot, a card case for receiving and keeping a card therein, the card case slidable between an inside position and an outside position of the housing through the case slot, a case guider fixedly mounted on an inside of the housing, corresponding to the case slot, in order to guide the sliding movement of the card case and a case locker for locking and unlocking the card case to and from the housing, respectively.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: October 20, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5752757
    Abstract: A card receptor for use in a satellite broadcasting tuner includes a housing having a case slot therethrough, a door mounted to the housing and slidable up and down for opening and closing the case slot, a card case for receiving and keeping a card therein, the card case slidable between an inside position and an outside position of the housing through the case slot, a case guider fixedly mounted on an inner part of the housing, corresponding to the case slot, in order to guide the sliding movement of the card case, a coil spring for elastically connecting the card case with the door, one end thereof being retained with a hook seat of the door and a case driving gears for moving the card case toward the outside position thereof to push the card case out of the housing, and for moving the card case toward the inside position thereof, in response to the up and the down movements of the door.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: May 19, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5715137
    Abstract: An apparatus for providing tilting and rotational movements of a display panel. The apparatus includes a first device for tilting the display panel toward or away from a viewer and a second device for rotating the display panel in sidewise directions. The first device has a supporting member for supporting the display panel and a pair of connecting members for connecting the display panel with the supporting member. The connecting members have spring loaded balls for rotatable engagement of the supporting member with the display panel. The second device has a pinion for driving the display panel and a power conveying unit for conveying the power from the driving pinion. The power conveying unit has a rack divided into a first gear portion and a second gear portion engaged with the driving pinion, and a driven pinion coupled to the supporting member and having a gear portion engaged with the first gear portion of the rack.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: February 3, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5715138
    Abstract: An apparatus for providing tilting and rotational movements of a display panel includes a first device for tilting the display panel toward or away from the viewer, a second device for rotating the display panel in sidewise directions, and a member connecting the first and the second devices. The first device has a pinion for driving the display panel and a unit for conveying the power from the pinion to the display panel, and the second device has a bevel gear for driving the display panel and a unit for conveying the power from the bevel gear to the display panel via the connecting member, thereby providing tilting movement of a visual display panel toward or away from a viewer and rotational movement thereof in sidewise directions.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: February 3, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi
  • Patent number: 5714960
    Abstract: A parabolic antenna includes a reflector, a feed horn positioned at a focal point of the reflector, a frame fixed on a rear side of the reflector at one end, an arm on one end of which the feed horn is fixed, a pair of hinges, a boss and a shaft. The hinges extend from the other end of the arm and spaced apart from each other, and the boss extends from the other end of the frame and is interposed between the hinges. The shaft is fitted through one hinge and into the boss and the other hinge. The parabolic antenna is further provided with at least one ball stopper having a ball and a spring. The ball stopper is inserted in a blind hole formed on an inner surface of each hinge, and the spring presses the ball against the boss so that the ball is fitted into one of the recesses, thereby holding the arm and the frame at a desired angle.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: February 3, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Hwan Choi