Method for controlling screen direction of a video display stand

• US 20010011696A1
• Filed: 01/29/2001
• Published: 08/09/2001
• Est. Priority Date: 12/08/1998
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeong, Seog Yeong
• Granted Patent: US 6,354,550 B2
• Time in Patent Office: Days
• US Class Current: 248/415
• CPC Class Codes: F16M 11/08 around a vertical axis , e.g. panoramic heads F16M11/12 takes precedence
• CPC Class Codes: F16M 11/18 with mechanism for moving the apparatus relatively to the stand
• CPC Class Codes: F16M 2200/08 Foot or support base
• CPC Class Codes: H04N 5/64 Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06
• CPC Class Codes: Y10T 74/1482 Single revolution input effects desired fractional output

Abstract

A video display stand having dual panning axes suitable for controlling a screen direction of appliances such as a TV set or a personal computer without bumping against a wall even in a state that it is positioned very closely to the wall, and its controlling method for automatically controlling screen directions by using a driving force, including two motors being installed having gear driving shafts at one side of either a rotational base or a rotation support member of the TV set; two movement guide toothed slots each being formed along a circular arc centering a mutually opposite gear driving shaft with a predetermined width and depth, at the opposite side corresponding to the position of each motor, and having a gear portion to be engaged with the gear driving shaft at one side of each wall; and a controller for controlling driving of the motors.

Claims

1. A video display stand having dual panning axes including a rotation support member for supporting the TV set, comprising:

two rotational shafts formed with a predetermined space at one side of either a lower surface of the TV set or the rotation support member; and

movement guide toothed slots formed at the mutually opposite side of the two rotational shafts to receive the rotational shafts, each movement guide toothed slot being formed along a circular arc taken centering the relatively other rotational shaft.

2. The video display stand according to

claim 1

, wherein the two rotational shafts are formed to be symmetrical on a straight line passing a center of gravity of the TV set.

3. The video display stand according to

claim 1

, wherein the movement guide toothed slots are formed with a predetermined length along an arc segment in a forward direction of the circular arc from each rotational shaft taking a space between the two rotational shafts as radius.

4. The video display stand according to

claim 1

, wherein the two rotational shafts formed with thread grooves are threaded through opening portions formed along the movement guide toothed slots by a screw so as to be fixed.

5. The video display stand according to

claim 1

, wherein in case that the rotational shafts are formed at the lower surface of the TV set and the movement guide toothed slots are formed at the rotation support member, the rotational shafts are positioned at a rear end portion of the movement guide toothed slots in a state that the TV set is directed to the front side.

6. The video display stand according to

claim 1

, wherein in case that the movement guide toothed slots are formed at the lower surface of the TV set and the rotational shafts are formed at the rotation support member, the rotational shafts are positioned at a front end portion of the movement guide toothed slots in a state that the TV set is directed to the front side.

7. A video display stand having dual panning axes including a rotational base incorporatively or separatively formed at a lower surface thereof and a rotation support member for movably supporting the rotational base, comprising:

two motors being installed with a predetermined space, having two gear driving shafts at one side of either the rotational base or the rotation support member, each being driven to be rotated in a normal direction and in a reverse direction;

two movement guide toothed slots each being formed along an arc segment of a circular arc centering a mutually opposite gear driving shaft with a predetermined width and depth, at the opposite side corresponding to the position of each motor, and having a gear portion to be engaged with the gear driving shaft at one side of each wall; and

a controller means for controlling driving of the motor.

8. The video display stand according to

claim 7

, wherein the driving shafts of the motor are positioned at a front end portion of the movement guide toothed slots when they are engaged with the gear portions of the movement guide toothed slots in a state that the TV set is directed to the front side.

9. The video display stand according to

claim 7

, wherein a combination groove with a predetermined size in a lengthy direction is formed on the same line where the two motor are installed, a combination hole is formed along the combination groove, a combination protuberance having a thread groove to be received to the combination groove with a predetermined margin forward and backward direction is formed at the central portion where the movement guide toothed slots are formed, all of which are threaded through the combination hole.

10. The video display stand according to

claim 9

, wherein the combination protuberance is formed at a position corresponding to the center of gravity of the TV set.

11. The video display stand according to

claim 7

, wherein the motors are formed to be symmetrical with a predetermined space on a straight line passing the center of gravity of the TV set.

12. The video display stand according to

claim 7

, wherein the movement guide toothed slots are formed with a predetermined length along a circular arc formed backward from each driving shafts taking the space between the two driving shafts of the motors as radius.

13. The video display stand according to

claim 7

, wherein switches are respectively installed at a front end portion of the movement guide toothed slots so that a screen direction of the TV set can be judged according to the state whether or not the switches are touched by motors relying on the rotation of the movement guide toothed slots.

14. The video display stand according to

claim 13

, wherein when the switches are touched by both of the two of the motors, the TV set is directed to the front side, while the switches are touched by only one of the motors, the TV set is directed to the left side or right side.

15. The video display stand according to

claim 7

, wherein the controller means includes:

a key input unit operated by a user;

detecting means for detecting the directions of the front, right and left side of the TV set and detecting a signal for informing each direction;

motor driving means for respectively driving the motors; and

a controlling means for controlling each part to enable the motor driving means to selectively drive the motor upon receiving the data of input signal from the key input unit and the signal from the detecting means.

16. A method for controlling screen direction of the video display stand having dual panning axes for which two motors are selectively driven in a normal direction (clockwise) and in a reverse direction according to a key operation by a user so that a TV set can be turned in the rightward direction or in the leftward direction centering driving shafts of each motor, comprising the steps of:

judging whether the key input by the user is a left turn command or right turn command, and the current screen direction of the TV set;

driving a motor positioned at the opposite side to the key input command, of the two motors, in the normal direction or in the reverse rotation direction until the key input is released, in case that the current TV set is directed to the front side or is placed in the same direction as the judged turn command; and

rotating a motor positioned at the side corresponding to the key input command, of the two motors, in the normal direction or in the reverse direction until the key input is released, in case that the TV set is placed in a different direction to the judged turn command.

17. The method according to

claim 16

, further includes a step for stopping the rotation of the motor positioned at the side corresponding to the key input and then rotating the other motor in the same rotation direction as that of the corresponding motor until the key input is released, in case that the key input has not released yet even when the current TV set is already directed to the front side.

18. The method according to

claim 16

, wherein in the step of judging whether the key input is right turn command or left turn command, and the screen direction of the TV set,

in case that the key input is a left turn command, when the TV set is directed to the same side as the judged command or to the front side, the right side motor is driven in the normal direction until the left turn command is released, while when the TV set is directed to the different side to the judged turn command, the left side motor is driven in the normal direction until the left turn command is released;

in case that the key input is a right turn command, when the TV set is directed to the same side as the judged command or to the front side, the left side motor is driven in the reverse direction until the right turn command is released, while when the TV set is directed to the different side to the judged turn command, the right side motor is driven in the reverse direction until the right turn command is released.

19. The method according to

claim 18

, wherein when the TV set is directed to the different side to the judged turn command, in case that the left turn command or right turn command is being kept even when the TV set is already turned to be directed to the front side after either the left side motor was driven in the normal direction or the right side motor was driven in the reverse direction, the driving of the motor corresponding to the command is stopped and then the other motor is driven in the same direction as that of the corresponding motor until the turning command is released.

20. The method according to

claim 16

, further includes a step for judging whether the key input is a power disconnection command besides the turn commands, according to which when it is the power disconnection command and the TV set is directed to the left side or to the right side, a normal position mode is performed to enable the two motors to be selectively driven so as to turn the TV set to be directed to the front side, and then the power is turned off.

21. The method according to

claim 20

, wherein the normal position mode is performed in that when the TV set is directed to the left side, the right side motor is driven in the reverse direction, while the TV set is directed to the right side, the left side motor is driven in the normal direction.

22. The method according to

claim 16

, wherein two switches are provided in the step for judging the current screen direction of the TV set by combining touch signals of the two switches in a manner that the switches are touched with both the two motors when the TV set is directed to the front side, while being touched by only one motor of them when the TV set is directed to the right or left side.

23. The method according to

claim 22

, wherein the switches are touched only by the left side motor when the TV set is directed to the left side, while they are touched only to the right side motor when the TV set is directed to the right side.