KR20070122325A - Apparatus for reversing picture of tv - Google Patents

Abstract

A television picture changing apparatus is provided to reverse left and right images of a television screen by installing a switching unit in a horizontal deflecting unit so as to apply horizontal deflecting currents reversely which are applied to a horizontal deflecting coil. A television picture changing apparatus comprises a switching unit(110), a power unit(130) and a micom(120). The switching unit is switched so as to be connected to a side terminal of a horizontal deflecting coil, and switches directions of horizontal deflecting currents applied from a horizontal deflecting unit(23) to the horizontal deflecting coil. The power unit controls power of a television. The micom controls the power unit to cut off power of the television during a preset setup time if a picture mode selecting signal is inputted, and controls the switching unit so that the directions of the horizontal deflecting currents can be switched.

Description

TV screen switching device {Apparatus for reversing picture of TV}

1 is a schematic block diagram of a typical TV.

2 is a circuit diagram of a conventional horizontal deflection portion.

3 is a circuit diagram of a TV screen left and right switching device according to an embodiment of the present invention.

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

110: switching unit

120: micom

130: power supply

140: remote control

The present invention relates to a TV, and more particularly, to a TV screen switching device for switching the left and right images of the TV screen.

At present, the TV which is generally used employs a CRT apparatus equipped with a CRT CRT tube as a direct view type image display device, and the R / G / B color signal supplied by the image processing circuit means is radiated through the R / G / B electron gun. By reaching the R / G / B fluorescent point through a shadow mask or the like, a predetermined desired image can be formed.

1 is a block diagram of a general TV.

As shown in FIG. 1, a general TV includes an image receiving circuit 10, a synchronous deflection circuit 200, a water pipe 30, an audio receiving circuit 40, and a speaker 50.

First, the image receiving circuit 10 amplifies an intermediate frequency signal output from the tuner 12 and the tuner 12 which selects and amplifies the channel propagation received from the antenna 11 and converts the signal frequency into an intermediate frequency. The image detector 14 and the image detector 140 for obtaining a composite image signal from the image intermediate frequency signal of the amplitude modulated wave output from the intermediate frequency amplifier 13, After amplifying the luminance signal from the obtained composite image signal, the amplified luminance signal, the carrier color signal, the synchronization signal, and the color booster are separately outputted from the image amplifier 15 and the carrier color signal transmitted from the image amplifier 15, respectively. The luminance signal amplified by the color reproducing circuit 16 and the image amplifying unit 15 and the color difference signal obtained by the color reproducing circuit 16 are converted into R, G, and B signals to obtain an image tube 30. It consists of the matrix 17 which outputs.

In addition, the voice receiving circuit 40 includes a voice medium frequency amplifier 41 for amplifying a voice medium frequency signal, and an FM detector 42 and an FM detector 42 for obtaining a low frequency signal from the voice medium frequency amplifier 41. It consists of an audio amplifier 43 for amplifying the weak low-frequency signal from the output to the speaker 50.

The synchronous deflection circuit 20 includes a synchronous separator 21 for obtaining horizontal and vertical synchronous signals from a luminance signal, and a vertical deflection part 22 for applying a horizontal deflection current of 60 Hz to the vertical deflection coil of the water pipe 30. And a horizontal deflection portion 23 for applying a horizontal deflection current of 15750 Hz to the horizontal deflection coil of the water pipe 30.

Here, as shown in FIG. 2, the horizontal deflection unit 23 includes a horizontal transistor (horizontal TR) which receives a horizontal driving pulse and is switched, and a deflection coil through which a horizontal deflection current flows by switching the horizontal transistor (horizontal TR). (DY), a capacitor (C1) for performing energy charging and discharging in the return period of the horizontal deflection current, and a damper diode (D1) for supplying a damping current in the turn-off period of the horizontal transistor (horizontal TR), and the capacitor connected in parallel. (C2, C3), resistor (R), and diode to form a complete sawtooth wave during the retrace period.

The horizontal deflection unit 23 causes the scanning line of the image screen to be scanned from left to right by the horizontal deflection current so that only a normal image screen is displayed. Such a TV is suitable for viewing from the front and is actually a beauty salon or aerobic. In a place where a mirror is used to watch TV, the left and right sides of the screen are changed.

Therefore, there is a need to switch the left and right screens of the TV so that the screen can be properly adjusted to be viewed at various places and locations.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and a TV screen switching device in which a switching unit is installed in a horizontal deflection unit so that a horizontal deflection current applied to a horizontal deflection coil is applied in a reverse direction. The purpose is to provide.

The present invention devised to achieve the above object is as follows. TV screen switching device of the present invention is switched so as to be connected to one terminal of the horizontal deflection coil to switch the direction of the horizontal deflection current applied to the horizontal deflection coil from the horizontal deflection coil, a power supply for controlling the power of the TV, screen And a microcomputer to control the power supply unit to cut off the power of the TV for a preset time when the mode selection signal is input, and to control the switching unit to change the direction of the horizontal deflection current. .

The setting time is characterized in that 3 seconds.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

3 is a circuit diagram of a TV screen left and right switching device according to an embodiment of the present invention.

For reference, hereinafter, the same reference numerals are given to the same parts as in the prior art, and detailed description thereof will be omitted. In this part, those skilled in the art will be able to easily implement.

TV screen left and right switching device according to an embodiment of the present invention comprises a switching unit 110, the microcomputer 120, the power supply unit 130, and the microcomputer 140.

First, the switching unit 110 is connected to a terminal of the deflection coil DY to control the direction of the horizontal deflection current applied from the horizontal deflection unit 23 to the deflection coil DY.

The switching unit 110 is switched to high (H) or low (L) in accordance with the control signal of the microcomputer 120 is connected to one terminal of the deflection coil (DY), high (H) when displaying a normal screen When the inverted screen is displayed and the image is reversed left and right, it is switched to low (L) so that the direction of the horizontal deflection current when the normal screen and the reverse screen is displayed is reversed.

In addition, the switching unit 110 may be switched according to the switching control signal of the microcomputer 120 even if the standby power of 5V or 12V is applied even if the TV is cut off.

The remote controller 140 inputs various control commands of the user, and according to an exemplary embodiment of the present invention, the remote controller 140 further includes a screen mode selection key for selecting whether to display a normal screen or a reverse screen.

The power supply unit 130 cuts off or supplies power to the TV according to the power control signal output from the microcomputer 120.

Lastly, the microcomputer 120 controls the switching unit 110 and the power supply unit 130 according to the screen mode selection signal input from the remote controller 140, and selects the screen mode from the remote controller 140. When the signal is input, the power control signal is output to the power supply unit 130 to cut off the power of the TV.

Here, the reason for shutting off the power of the TV when the screen mode selection signal is input from the remote controller 140 is to control the switching unit 110 while the power is applied, the horizontal deflection unit 23 or the horizontal transistor (horizontal TR). Because it is damaged.

As such, when the TV power is cut off by outputting a power control signal to the power supply unit 130, the switching control signal is output to the switching unit 110 to switch the switching unit 110 to high (H) or low (L). Thereafter, the direction of the horizontal deflection current applied to the deflection coil DY can be switched.

In addition, it is determined whether the preset setting time, preferably 3 seconds has elapsed, and when the setting time has elapsed, a power control signal is output to the power supply unit 130 to supply power to the TV.

Therefore, since the switching unit 110 is switched to the high (H) or the low (L) state according to the control signal of the microcomputer (120) while the power is cut off, the horizontal deflection current is switched by the switching unit (110). Depending on the state, it is applied in the forward or reverse direction, and thus the TV screen is displayed as the normal screen or the reverse screen.

That is, when the screen mode selection signal is input from the remote controller 140, the TV screen switching device according to the embodiment of the present invention first controls the power supply unit 130 to cut off the power of the TV, and then switches the switching unit 110. The control is switched, and when the set time elapses, power is applied again to display the left and right screens in a changed state.

The present invention is not limited to the above-described embodiments and can be carried out in various modifications within the scope of the technical idea of the present invention.

According to the present invention configured as described above, it is necessary to install a switching unit at the rear end of the horizontal deflection portion so that the horizontal deflection current applied to the horizontal deflection coil is applied in the reverse direction, thereby switching the direction of the horizontal deflection current applied to the deflection coil in the forward or reverse direction. As a result, the left and right images of the TV screen can be appropriately switched.

Claims (2)

A switching unit which is switched to be connected to one terminal of the horizontal deflection coil so as to switch the direction of the horizontal deflection current applied to the horizontal deflection coil from the horizontal deflection unit; A power supply unit controlling power of the TV; TV screen switching including a microcomputer to control the power supply unit to cut off the power of the TV for a predetermined set time when the screen mode selection signal is input, and to control the switching unit to change the direction of the horizontal deflection current. Device. The apparatus of claim 1, wherein the set time is 3 seconds.

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