KR100737809B1 - Method for automatic turning television screen - Google Patents

Abstract

The present invention relates to a method for automatically rotating a television screen toward a viewer with a remote control when the viewer presses a television remote control button. When the viewer presses the television remote control button, the present invention relates to an infrared signal and an ultrasonic signal or a radio signal from a remote control. By transmitting the ultrasonic signal to the remote control receiving module of the television, the position of the viewer with the remote control is determined from the speed difference between the infrared signal and the ultrasonic signal or the radio signal and the ultrasonic signal. It is characterized by being able to watch television screen.

TV, remote control, screen, auto rotation, ultrasound, position

Description

How to automatically rotate your television screen {METHOD FOR AUTOMATIC TURNING TELEVISION SCREEN}

1 is a schematic perspective view of a television receiver according to the present invention;

2 is a schematic perspective view of a television remote control according to the present invention;

3 is an automatic rotation module block diagram for performing television automatic rotation processing according to the present invention.

4 is a view for explaining the principle of automatic rotation of the television screen by the ultrasonic sensor remote control according to the present invention.

<Description of the symbols for the main parts of the drawings>

110a: upper ultrasonic signal receiver 110b: left ultrasonic signal receiver

110c: right ultrasonic signal receiver 110d: lower ultrasonic signal receiver

120: infrared or radio signal receiver

130: television body 140: television rotating body

150: television swivel

210: remote control body

220: ultrasonic signal transmitting unit of the remote control

230: remote control infrared or radio signal transmitter

310: television remote control signal processing unit

320: position recognition processing unit

330: television rotating control unit

410: location of the remote control

420a: ultrasonic signal receiving unit 110b

420b: ultrasonic signal receiving unit 110c

430: the intermediate point between the ultrasonic signal receiving unit (110b, 110c)

440a: front of television

440b: front of television after rotation

450a: distance between the remote controller 410 and the ultrasonic signal receiver 420a

450b: distance between the remote controller 410 and the ultrasonic signal receiver 420b

460: distance between the midpoint 430 between the remote control 410 and the ultrasonic signal receiving unit (420a, 420b)

470: the angle of 90 degrees or less of the cabinet formed by the line 460 and the television front portion 440a

480: rotation angle of the television body 130

The present invention relates to a method in which a television screen can be automatically rotated toward a viewer with a remote control when the viewer presses a television remote control button.

In general, when people watch television, the television receiver is always in a fixed position, so there is a limit to where the television can be viewed. Also, even if you try to change the position of the television set, you may rotate horizontally or change the position only in front, rear, left, and right, so that the viewer's position may not match the television screen. There was a hassle to adjust every time.

Efforts have been made to reduce such inconvenience, for example, the moving TV receiver described in Korean Patent Application No. 88-16345 has a driving seat having a head unit with a built-in CRT and a driving device in an inner space chamber. The head portion is detachably formed, and the head portion is rotatably provided on the driving seat portion. In addition, the lower surface of the drive seat is provided with a drive wheel and a self-rotating caster that is connected to the drive device inside the space compartment. Therefore, by operating the drive inside the drive seat by remote control of the remote control can move the entire head portion and the drive seat before, after or left and right, and only by remotely controlling the head of the top of the drive seat Left and right rotation or up and down tilt angle was adjustable. However, such moving TV receivers require a complicated control device for moving the entire TV receiver, and the price of the TV receiver is increased because the driving device capable of rotating only the head at a predetermined angle is complicated. It has a disadvantage of high failure rate. In addition, there is a problem that the TV receiver is enlarged due to the driving seat unit and the head unit in which the CRT is installed, thereby limiting the installation space.

As another conventional technology, the moving TV receiver described in Korean Patent Application No. 89-64 has a head part with a built-in CRT, a moving part installed inside and a movable part capable of operating up and down, and a driving seat serving as a support. It is composed of a part, and by operating the drive unit in the flow section and the driving seat by remote control of the remote control, the head section and the flow section can be rotated left and right or the head section can be tilted up and down, and the head section is adjusted up and down I was able to. However, the moving TV receiver also requires a complicated control device because the device for moving the head portion in various directions is complicated, and this complicated control device increases the price of the product and causes the failure rate. As described above, there is a problem in that the TV receiver is enlarged due to devices for additional functions, thereby limiting the installation space.

Swiveling means for rotating the TV receiver body about a central axis, at a predetermined angle range and speed, including a first motor means to eliminate these surfaces, and a second motor means, the screen of the TV receiver A tilting means for adjusting the directing angle up and down in a predetermined angle range and speed, and a speaker rotating means for rotating the directing direction of the speaker of the TV speaker at a predetermined angle range and speed about the speaker hinge axis, including a third motor means. In the TV receiver comprising, the control device for controlling the swivel means, the tilt means and the speaker rotation means, can be manually selected by the user, any one of the first, second and third motor means Signal generating means for generating a driving direction of the means and a selection signal instructing driving; A TV including driving means for driving a selection motor indicated by the selection signal in a selected direction in response to the selection signal from the signal generating means is disclosed in Korean Patent Registration No. 97-008373.

The conventional method of rotating a television screen is mostly horizontal and vertical rotation using a television receiver and a pedestal based on mechanical driving means. However, all of the above-described prior art methods do not automatically determine and rotate the viewer's position, but merely rotate the television receiver by the viewer's operation based on the viewer's judgment. That is, it does not present a configuration that can be rotated automatically without the user's manipulation of the rotation of the TV receiver.

On the other hand, there is a patent application No. 10-1995-0010483 "TV rotating device using an optical sensor" of Daewoo Electronics as an automated method of rotating the television receiver. It measures the amount of light incident on the screen using the photometric detection sensors installed on both sides of the television, sets the angle of rotation of the television according to the amount of light, and rotates the television to the opposite side of the direction of light incidence. By minimizing the amount of light, it complements the screen state, allowing viewers to watch television with a clearer screen state. However, this method is a method of rotating the television depending on the amount of light rather than grasping the viewer's position, there is an inconvenience that the viewer must move to match the television screen.

In other words, the above technology does not automatically detect the location of the viewer to provide the viewer with the best screen orientation.

In addition, the drive control device that controls these motors to change the direction angle by reading the commands provided from the TV remote control and manual operation, i.e. the failure rate in mass production should be low due to the fact that the products provided are for home appliances. Simple circuit and low hardware price. Iii) It should satisfy the constraints such as low electromagnetic wave generation and no electric noise, but the conventional device could not implement them.

In order to automatically detect the viewer's position and drive the rotating motor, position recognition technology should be applied. Location awareness is one of the technologies that has been studied for a relatively long time. The most representative example of this technology, called Localization or Positioning, is the Global Positioning System (GPS). GPS is a global positioning system that uses satellites to find the location of observation points by receiving radio waves from satellites that know their exact location. GPS is already being used as a car navigation system. However, this technology has a disadvantage that it cannot be used where GPS reception is not possible, such as in a building or in a tunnel. In addition, the error range is a few meters, which is not suitable for home use. Other methods of determining the direction include the method of detecting the direction of the received wave by measuring the received radio signal strength, but all of these methods are not suitable for use in the home.

A number of methods for determining the position and direction of a specific object among the photographed subjects by processing the image photographed by the camera have been proposed, but it is not appropriate to apply to general home appliances because expensive equipment is required.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems and needs is to provide a TV receiver capable of automatically and accurately identifying the position of a TV viewer and watching TV in an optimal screen direction.

Another object of the present invention is to provide a method and apparatus for locating an object with high precision at a short distance such as an indoor space.

In order to achieve the above object, in a television system that automatically recognizes a viewer's position and automatically provides an optimal screen orientation, the same control command is simultaneously emitted by a first radio signal and a second radio signal having different speeds. A remote control having respective transmission units for receiving the first and second radio signals from the remote control unit, and a television receiver receiving the relative positions of the remote controllers and rotating the remote control toward the remote control unit. A first receiver configured to receive a first wireless signal emitted from the remote controller, a second receiver configured to receive a second wireless signal emitted simultaneously with the first wireless signal from the remote controller and at least two receiver terminals spaced apart from each other; Based on reception times of the radio signals respectively received by the first and second receivers, respectively. A processor for calculating a distance between each of the remote controller and the at least two receivers of the second receiver and the remote controller, and determining a rotation angle based on the calculated distance to generate a control signal; Provided is a television system comprising a rotating unit for rotating the receiver based on a signal.

According to another aspect of the present invention, a method for rotating a television system in which a screen is automatically rotated toward a viewer by recognizing a viewer's position, the method comprising: providing a first receiver configured to receive a first wireless signal; A second receiving unit comprising two receiving terminals for receiving a second radio signal having a slower propagation speed than a first radio signal, and simultaneously emitting toward the first receiver and the second receiver from a remote control located at an arbitrary place. Receiving first and second radio signals including the same control command, a time at which the first radio signal arrives at the first receiver, and the second radio signal at the two receivers; Calculating a difference from a time of reaching each of the receiving terminals, and multiplying the time difference by the speed of the second wireless signal to obtain the remote controller and the two receiving terminals. Calculating a distance of the television, using a trigonometric function associated with an area with respect to a triangle having the two receiver terminals and the remote control as a vertex, and calculating the angle of rotation of the television; A rotation method is provided that includes rotating as many television receivers as possible.

Hereinafter, the configuration of the present invention through the accompanying drawings and preferred embodiments will be described in detail.

In a preferred embodiment of the present invention, when a viewer presses a television remote control button, two kinds of wireless signals having different speeds are simultaneously emitted from the remote control, and the position of the remote control, i.e., the viewer's position, is determined from the difference in the reception time. It automatically rotates toward the viewer so that the viewer can watch the television screen from the front. Two kinds of radio signals having different speeds are suitable for light waves / electromagnetic waves such as infrared signals or radio signals and sound signals other than audio frequency bands such as ultrasonic signals.

1 shows a television receiver constituting a television system according to the invention. The front part of the television receiver includes up, down, left and right ultrasonic signal receivers 110a to 110d and a remote controller receiver 120 capable of receiving an infrared signal or a radio signal disposed at the center of the television receiver, and the television main body 130 includes the television. The television remote control signal processor 310, the position recognition processor 320, and the television rotating body controller 330 shown in FIG. 3, which may analyze and process ultrasonic signals and radio signals or ultrasonic signals and infrared signals from the remote controller. Include.

The television remote control signal processor 310 receives the infrared signal or the radio signal of the television remote control to handle the change of the television channel and the original function of the television remote control, and the position recognition processor 320 is an ultrasonic signal and a radio signal from the television remote control. Alternatively, the position of the television remote control is determined by using an ultrasonic signal and an infrared signal to calculate a rotation angle of the television main body 130, and to request the rotation of the television main body 130 through the television rotation control unit 330. .

The television rotor control unit 330 is in charge of mechanical functions such as control of a motor for rotating the television main body 130.

2 is a view showing a remote controller used in the television system according to the present invention. As shown, the remote control according to the present invention further includes an ultrasonic signal transmitter 220 in addition to the remote control infrared or radio signal transmitter 230. These transmitters 220 and 230 emit remote control infrared or radio signals and ultrasonic signals at the same time, respectively.

A method of calculating a rotation angle, which is one of the main features of the present invention, will be described in detail with reference to FIG. 4.

The rotation angle 480 of the television body can be calculated using the triangular width formula. The width of a triangle can be calculated by knowing the length of the two sides and the angle between them, and the width of the triangle by knowing the length of the three sides (heron's formula).

When these two formulas are applied to a triangle generated when two of the four ultrasonic signal receivers 420a and 420b disposed on the front of the television are selected to be two points of a triangle and the television remote control 410 is one point, the television body The rotation angle of 480 can be calculated.

The distances 450a and 450b between the television remote controller 410 and the ultrasonic signal receivers 420a and 420b may be obtained using a time difference between the ultrasonic signal and the infrared signal or the ultrasonic signal and the radio signal. When an infrared signal or radio signal is the same as the speed of light and the ultrasonic speed is about 340m / s, the speed of light is 10 ⁶ times faster than the sound wave signal. It can be assumed to reach. Therefore, the distances 450a and 450b between the television remote control 410 and the ultrasonic signal receivers 420a and 420b are different from the time when the infrared or radio signal arrives and the time when the ultrasonic signal reaches the ultrasonic signal receivers 420a and 420b, respectively. The difference is obtained by multiplying the speed of sound waves by 340 m / s.) This value is accurate enough to have an error within 3 cm. Therefore, the area S of the triangle formed by the three sides 450a, 450b, and 440a can be obtained from the following Heron's formula.

only,

S calculated from the above formula Through the three sides (450a, 460, 420a ~ 430) it can be seen that the area of the triangle is S / 2.

The length of one side 460 of the three sides 450a, 460, and 420a to 430 is obtained by applying the same to the formula of heron again.

,

,

only

The angle 470 formed by the side 460 and the other side 420a to 430 can be known through the following triangular formula.

However, θ is the internal angle between the two sides (460, 420a ~ 430), S is the width of the triangle formed by the three sides (450a, 450b, 440a).

Finally, the rotation angle 480 for rotating the television screen toward the viewer with the remote control can be obtained by subtracting θ 470 from 90 degrees.

By applying the above-described formula, the rotation angle of the television screen in the vertical direction, that is, the vertical direction can also be obtained. In this case, ultrasonic sensors disposed above and below the television receiver will be used.

Although the configuration of the present invention has been described in detail through the preferred embodiments, those skilled in the art will be able to make various modifications and changes within the scope of the technical idea of the present invention. For example, in the preferred embodiment of the present invention, the rotation angle is calculated using the speed difference between the infrared ray or the Lydo signal and the ultrasonic signal, but it is also according to the technical idea of the present invention to use two different radio signals having different speeds. Of course. Therefore, the protection scope of the present invention will be defined by the description of the claims below.

As described above, according to the present invention, an optimal viewing direction can be automatically provided to the television viewer. Furthermore, according to the present invention, the position can be accurately identified with a high precision of several centimeters through a simple structure and simple operation, and since only the sound wave transceiver is added to the conventional remote control method, i) the failure rate should be low in mass production. ii) The circuit is simple, the hardware price is low, and iii) the electromagnetic wave requirements are low, and the electric appliance shall not be constrained by electric noise.

Claims (7)

In a television system that automatically recognizes the viewer's position and automatically provides the best screen orientation, A remote controller having a respective transmission unit for simultaneously emitting a first radio signal propagating at the speed of light and a second radio signal propagating at the speed of sound; Receiving the first and second radio signals from the remote control to determine the relative position of the remote control includes a television receiver for rotating in the direction of the remote control, The television receiver, A first receiver configured to receive a first wireless signal emitted from the remote controller; A second receiver for receiving a second radio signal emitted simultaneously with the first radio signal from the remote controller and including at least two receiver terminals spaced apart from each other; Calculate a distance between each of the remote controller and each of the at least two receivers of the second receiver and the remote controller based on a reception time of the wireless signal respectively received by the first and second receivers, and based on the calculated distance Processing unit to determine the rotation angle by A control unit which receives the determined rotation angle from the position recognition processor and generates a control signal; Rotating unit for rotating the water receiver based on the control signal of the controller Television system comprising a. The method of claim 1, The receiver of the second receiver is located at least on the left and right sides of the television receiver respectively; The method of claim 2, And the second receiver includes two receivers respectively positioned at an upper center portion and a lower center portion of the television receiver. The method of claim 1, The first radio signal is a light wave or an electromagnetic wave, and the second radio signal is an ultrasonic wave. In the rotation method of a television system in which the screen is automatically rotated toward the viewer by recognizing the position of the viewer, Providing a first receiver to receive a first wireless signal; Providing a second receiver including two receiver terminals for receiving a second radio signal having a slower propagation speed than the first radio signal; Receiving first and second radio signals simultaneously emitted from the remote control located at an arbitrary location toward the first receiver and the second receiver; Calculating a difference between a time when the first wireless signal reaches the first receiving unit and a time when the second wireless signal reaches the two receiving terminals of the second receiving unit, respectively; Calculating respective distances between the remote controller and the two receiving terminals by multiplying the time difference by the speed of the second wireless signal; Calculating a rotation angle of a television using a trigonometric function associated with an area of a triangle having the two reception terminals and the remote control as vertices; Rotating the television receiver by the calculated rotation angle. Rotation method comprising a. 6. The rotation method according to claim 5, wherein the first radio signal is an optical wave or an electromagnetic wave, and the second radio signal is an ultrasonic wave. The method of claim 5, wherein the calculating of the rotation angle Equation

, only

Where 450a and 450b are distances between the remote control and the two receiving terminals, and 440a is the distance between the two receiving terminals, obtaining the area S of the triangle; Equation

, only

Calculating a distance 460 between the center point of the side 440a formed by the two receiving terminals and the remote control unit by the distance between the remote control unit and the center point of 440a, and Trigonometric

Obtaining an internal angle (θ) at which the sides 440a formed by the two receiving terminals and the sides 460 formed by the center point of the side and the remote control are crossed by Obtaining a value obtained by subtracting the cabinet from 90 as a rotation angle The meeting method that these include.

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