KR100227108B1 - Remote screen voltage control apparatus of cathode-ray tube - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for a television screen voltage, wherein the remote control unit (40) for setting a remote control mode and an adjustment level of the screen voltage obtained through the variable resistor (36) on the secondary side of the flyback transformer (32). And a frequency multiplier 46 for converting the basic oscillation frequency signal oscillated by the oscillator 44 into various frequency multiplied signals, in the frequency multiplier 46 corresponding to the adjustment level in the remote control mode of the screen voltage. A control unit 42 for selecting a frequency multiplication signal of the control unit 42, a frequency control unit 48 for supplying the frequency multiplication signal selected by the control unit 42 as a signal for adjusting the screen voltage, and switching in response to the adjustment signal of the screen voltage A first switching transistor 50 which is driven in a current manner, and a power source that is transformed by switching driving of the first switching transistor 50 to generate a second switching transistor. The transformer 54 includes a transformer transformer 52 for driving the jitter 54 so as to adjust the screen voltage so that the screen voltage can be remotely controlled by the remote controller 40.

Description

Remote control device of television screen voltage

The present invention relates to a remote control device for a television screen voltage, and more particularly, to a remote control device for a television screen voltage adapted to remotely adjust a screen voltage applied to a screen grid of a CRT device.

In general, a CRT apparatus for reproducing a video is provided as a video output apparatus in a television that reproduces video and audio of a broadcast signal transmitted over the air or reproduces a composite video signal externally applied to video and audio. According to the CRT apparatus, when the color beam emitted from the R / G / B electron gun reaches the R / G / B color pixel point on the fluorescent panel based on the R / G / B color component of the image signal, the R / G / B A method of reproducing a color image by emitting color pixels is applied.

FIG. 1 is a view illustrating a structure of a CRT apparatus employed in a general television. According to the structure of the CRT apparatus shown in FIG. 1, reference numeral 1 is arranged in an in-line form or in a Δ- form, and R / Representative cathodes of R / G / B electron guns that emit hot electrons of the G / B color beam component (B), 2 denotes a heater that heats the cathode 1 to about 800 ° C., and 3 denotes the cathode The first grid (control grid) for controlling the brightness of the screen by controlling the amount of electrons by the voltage difference applied to the wood 1, that is, the bias voltage, is shown.

In addition, 4 represents a second grid (screen grid) that sucks the positive electrons adjusted in the control grid 3 by a positive voltage, 5 and 6 are the color beams B passing through the screen grid (4) The third and fourth grids (focus electrode and high voltage electrode) for further accelerating electrons of the? In addition, a pre-focus lens 7 for prefocusing electrons of the color beam B is provided between the screen grid 4 and the focus grid 5, and the focus grid 5 is provided. A focus lens 8 for focusing the color beam B is provided between the and the high voltage electrodes 6.

In addition, in FIG. 1, reference numeral 9 denotes a shadow mask which guides the plurality of through holes to be formed so that the electrons of the color beam B reach the R / G / B fluorescent points formed on the fluorescent panel 10. Denoted at 10 is a high voltage power supply for allowing a high voltage anode current to flow through the anode electrode of the corresponding CRT apparatus.

According to the CRT apparatus having the above-described configuration, the cathode 1 corresponding to the R / G / B color signal of the image signal processed by the image processing system while the cathode 1 is heated by the heater 2 is corresponding. ) Is applied to the cathode (1), the hot electrons of the color beam (B) is emitted, and when the voltage (approximately 200V-400V) is applied to the screen grid 4, the control grid 3 and the screen grid Depending on the bias voltage of (4), the amount of electrons passing through the control grid 3 is appropriately adjusted and accelerated toward the screen grid 4 side. The electrons of the accelerated color beam B are further accelerated toward the focus grid 5 and the high voltage electrode 6 to which a relatively high voltage is applied through the prefocus lens 7, and of the accelerated color beam B. The electrons reach the corresponding R / G / B fluorescent points on the fluorescent panel 10 through the shadow mask 9 to emit the pixels, and thus the color image is reproduced on the fluorescent panel 10.

As the electrons reaching the fluorescent panel 10 flow into the high voltage power source 10 along the direction of the arrow in the drawing, the high voltage anode current is applied to the anode electrode of the corresponding CRT apparatus.

2 is a circuit diagram of a power supply system for generating a power source for operation of a television including a CRT apparatus having the above-described structure, wherein reference numeral 22 denotes a switching ON / OFF by a horizontal drive signal output from a horizontal drive stage of a horizontal deflection meter. A horizontal output transistor is shown, and 24 is a damping circuit part for switching ON / OFF operation of the horizontal output transistor 22, and is composed of a damping diode 26 and a capacitor 28 connected in the reverse direction. Further, 30 denotes a horizontal deflection coil which horizontally deflects the color beam B of the CRT apparatus shown in FIG. 1 by the collector current appearing on the collector side in accordance with the switching ON / OFF operation of the horizontal output transistor 22. 32 is a flyback transformer in which a primary side is commonly connected to the collector side of the horizontal output transistor 22. On the secondary side of the flyback transformer 32, an anode voltage of the CRT device is obtained. The focus voltage FOCUS applied to the focus grid 5 on the variable resistor 34 side and the screen voltage SCREEN applied to the screen grid 4 on the resistor 36 side are obtained.

Here, according to the power supply system shown in Fig. 2, the voltage applied to the screen grid is approximately 400KV, and the acceleration of the color beam emitted from the R / G / B electron gun is performed based on the voltage level applied to the screen grid. Therefore, it is preferable that the screen voltage applied to the screen grid 4 should be adjusted and maintained in an appropriate state at all times. Therefore, in the power supply illustrated in FIG. 2, the variable resistor 36 is provided to the screen voltage SCREEN induced on the secondary side of the flyback transformer 32, and the screen grid is adjusted by adjusting the resistance of the variable resistor 36. The voltage level applied to (4) is adjusted.

However, in general, the flyback transformer 32 shown in FIG. 2 is installed in a television in a modular state, and the modular flyback transformer 32 adjusts the focus voltage FOCUS and the screen grid 4. The adjustment port of the variable resistor 36 is also designed, and even if the screen voltage SCREEN is adjusted appropriately by adjusting the variable resistance value of the variable resistor 36 by the adjustment port, This often causes an adjustment of the screen voltage SCREEN. That is, since the adjustment range of the screen voltage is approximately 200-400V, even if the adjustment state is slightly changed, it has a significant influence on the operation of the screen grid 4 of the CRT apparatus.

Moreover, when the adjustment state of the screen voltage is changed, it is necessary to open the back cover of the corresponding television to adjust the adjustment port of the modular flyback transformer 32 to readjust the variation of the screen voltage. The adjustment work involves considerable trouble, including opening the back cover.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and a remote control apparatus for a television screen voltage, which is induced at the secondary side of the flyback transformer and externally controlled by a remote controller, is applied to the screen voltage applied to the screen grid of the CRT device. The purpose is to provide.

In order to achieve the above object, according to a preferred embodiment of the present invention, in a television equipped with a CRT apparatus to which a screen voltage obtained through a variable resistor is applied on the secondary side of a flyback transformer, a remote control mode and adjustment of the screen voltage is performed. A remote controller for setting a level, a frequency multiplier for converting the basic oscillation frequency signal oscillated in the oscillator into various frequency multiplied signals, and a frequency multiplier in the frequency multiplier corresponding to the adjustment level in the remote control mode of the screen voltage A control unit for selecting a multiplier signal, a frequency control unit for supplying a frequency multiplication signal selected by the control unit as a signal for adjusting the screen voltage, a first switching transistor current driven in a switching method in response to the adjustment signal of the screen voltage, and the first switching transistor; 1 is transformed by the switching drive of the switching transistor The remote control device of the television screen voltage is configured to include a variable pressure transmitter that allows to generate a second screen wherein the voltage adjusting the current to the switching transistor driving the power source is provided.

According to the present invention, the OSD processing unit generates an OSD signal for displaying the remote control mode and the adjustment level of the screen voltage under the control of the controller, and reproduces the OSD signal processed by the OSD processing unit to be displayed on the CRT apparatus. And an image processing unit.

According to the remote control apparatus for television screen voltage according to the present invention having the above-described configuration, when the screen voltage adjustment mode is transmitted by the remote controller and the screen voltage adjustment level is transmitted remotely, the basic frequency signal oscillated by the oscillator under the control of the controller Is multiplied by the frequency multiplier and converted into a voltage by the frequency-voltage converter, and the voltage is applied as a switching ON / OFF signal of the first switching transistor to adjust the screen voltage obtained on the secondary side of the flyback transformer.

1 is a view for explaining the structure of a CRT apparatus applied to a general television;

FIG. 2 is a circuit diagram illustrating a power supply system for generating an operating power source of a television including the CRT device shown in FIG. 1;

3 is a view showing the configuration of a remote control device for a television screen voltage according to a preferred embodiment of the present invention;

4 (a) is a block diagram showing a remote control apparatus for a television screen voltage according to another embodiment of the present invention;

4B is an exemplary view showing a screen display state in a screen voltage remote control mode by a remote control apparatus for a television screen voltage according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

4: screen grid, 32: flyback transformer,

36: variable resistor for screen voltage adjustment, 40: remote control,

42: control unit, 44: oscillation unit,

46: frequency multiplier, 48: frequency control unit,

50: first switching transistor, 52: transformer transformer,

54: second switching transistor.

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

3 is a block diagram showing a remote control apparatus for a television screen voltage according to a preferred embodiment of the present invention. Reference numeral 40 denotes a remote control signal for activating a specific function among all functions added to the corresponding television. The remote controller 40 has a screen adjustment mode setting button 40a for remote control of the screen voltage and a channel up / down button or a volume up / down button for up / down adjustment of the screen voltage. The screen voltage adjustment button 40b is provided.

In addition, 42 is a control unit for executing a specific function of the television in response to the remote control signal transmitted from the remote control unit 40, the control unit 42 of the screen voltage adjustment mode setting button 40a of the remote control unit 40 At the time of operation, after setting a mode for adjusting the screen voltage obtained on the secondary side of the flyback transformer, the screen voltage adjustment button 40b is controlled in response to the operation of the screen voltage adjustment button 40b.

In FIG. 3, reference numeral 44 denotes an oscillator configured to oscillate a basic frequency signal composed of an X-oscillator, and 46 denotes a basic frequency signal oscillated by the oscillator 44 by a button 10b of the remote controller 10. A frequency multiplier that provides a result of frequency multiplication under the control of the controller 42 based on the set screen voltage adjustment level, wherein the frequency multiplier 46 has a fundamental frequency signal oscillated by the oscillator 44. A plurality of frequency multipliers 46a to 46n multiply by 1 to N times.

48 denotes a frequency controller for converting the frequency signal applied from the frequency multiplier 46 into a signal for adjusting the screen voltage, and 50 denotes a base connected to the frequency controller 48 so that the frequency controller 48 A first switching transistor of a current driving method that switches by an applied frequency signal. 52 is a transformer transformer provided at the collector side of the first switching transistor 50 to form a transistor driving voltage, and the rated voltage B + is applied to one end of the primary coil 52a of the transformer transformer 52. On the other hand, the other end is connected to the collector of the first switching transistor 50, and a large power source is obtained in proportion to the number of turns in the secondary coil 52b.

In FIG. 3, reference numeral 54 denotes a flyback transformer 32 having a relatively large breakdown voltage and having a base connected to one end of the secondary coil 52 of the transformer transformer 52. A second switching transistor of the current drive type for adjusting the screen voltage SCREEN is connected to the screen voltage SCREEN obtained on the variable resistor 36 side connected to the secondary side of the circuit. .

Next, the operation of the remote control device of the television screen voltage according to the present invention having the above-described configuration will be described.

First, when the power of the corresponding television is turned on by the remote controller 20, the anode voltage of the CRT device is obtained on the secondary side of the flyback transformer 32 shown in FIG. The focus voltage FOCUS and the screen voltage SCREEN of the level adjusted by 36 are obtained, and the television performs normal video / audio signal reproduction.

In this state, the screen voltage SCREEN adjusted by the variable resistor 36 is changed so that the remote control mode of the screen voltage is set by the screen voltage adjustment mode setting button 40a of the remote controller 40. When the screen voltage adjustment level is transmitted by the button 40b, the control section 42 oscillates in the oscillator 44 corresponding to the screen voltage adjustment level so that each frequency multiplier 46a of the frequency multiplier 46 is generated. Select the frequency signal multiplied by 46n). The selected frequency multiplier signal is applied to the frequency controller 48 and applied to the base of the first switching transistor 50 by, for example, a waveform shaping process or the like, and thus the first switching. The transistor 50 performs the switching operation by the frequency signal. According to the switching operation of the first switching transistor 50, a relatively large driving power is obtained in proportion to the number of turns of the secondary coil 52b of the transformer transformer 52 in which the primary coil 52a is connected to the collector side. And is applied to the base of the second switching transistor 54 having a large breakdown voltage. Accordingly, the voltage level of the screen voltage SCREEN obtained on the variable resistor 36 side is switched by the second switching transistor 54 in response to the frequency signal applied through the frequency control section 48. This level is adjusted to the level set by the remote controller 40.

Therefore, according to one embodiment of the present invention, the screen voltage of the television can be properly adjusted while viewing the screen state of the CRT apparatus, and the screen voltage can be adjusted remotely without opening the television back cover. do.

4 (a) shows a remote control apparatus for a television screen voltage according to another example of the present invention, and FIG. 4 (b) shows a screen display state of the CRT apparatus in the adjustment mode of the screen voltage. According to one example of the present invention, the screen voltage of the CRT apparatus should be adjusted while adjusting the screen voltage, but according to another example of the present invention, the remote control mode of the screen voltage is set by the remote controller 40. Is processed as an OSD signal and displayed on the screen of the CRT device to provide smoothness of adjustment.

That is, according to FIG. 4A, the OSD (On) is controlled under the control of the control unit 42 in response to the remote control mode setting and adjustment level signal of the screen voltage transmitted to the control unit 42 for the configuration shown in FIG. 3. OSD processing unit 58 for generating a screen display signal, and OSD for the screen voltage remote control and adjustment level provided by the OSD processing unit 58, as well as the reproduction process of the video IF signal PIF of the television. And an image processor 60 for reproducing the signal and displaying the signal on the screen of the CRT device 62. The screen voltage is adjusted on the screen of the CRT device 62 in the remote control mode of the screen voltage. The display area ('64' in FIG. 4 (b)) and the area for displaying the adjustment level ('66' in FIG. 4 (b)) are defined.

Therefore, in another example of the present invention illustrated in FIG. 4A, when the remote control mode of the screen voltage is set by the screen voltage adjustment mode setting button 40a of the remote controller 40, the control unit 42 controls the control unit 42. The OSD processing unit 58 is controlled to generate an OSD signal for displaying the remote control mode of the screen voltage. Thus, the OSD signal relating to the remote control mode of the screen voltage generated by the OSD processing unit 58 is generated. The image processing unit 60 is reproduced to be displayed on the screen area 62 of the CRT device 62.

Subsequently, when an adjustment level of the screen voltage is applied by the button 40b of the remote controller 40, the controller 42 controls the OSD processing unit 58 to generate an OSD signal corresponding to the adjustment level. In addition to displaying on the screen area 66 of the CRT apparatus 62 through the processor 60, the frequency multiplier 46 selects a frequency signal corresponding to the adjustment level according to the process described with reference to FIG. As the frequency signal selected by the frequency multiplier 46 drives the first switching transistor 50 through the frequency controller 48, it is induced on the secondary side of the transformer transformer 52. As the current is adjusted, the second switching transistor is also driven to adjust the screen voltage SCREEN obtained from the variable resistor 36 connected to the secondary side of the flyback transformer FBT 32.

On the other hand, while the above has been described assuming that the present invention is applied for remote control to the screen voltage, the present invention can be applied to the same or similar to the adjustment of the focus voltage, within the scope not departing from the gist and the gist of the invention. Various changes and modifications can be made in the following.

As described above, according to the remote control device of the television screen voltage according to the present invention, the screen voltage obtained from the flyback transformer can be remotely controlled by the remote controller, so that the adjustment of the screen voltage is performed without opening the back cover. It can be implemented quite easily. Moreover, the effect of enabling identification of the level adjusted by the OSD display of the screen adjustment level can also be achieved.

Claims (3)

In a television equipped with a CRT apparatus to which a screen voltage obtained through the variable resistor 36 is applied on the secondary side of the flyback transformer 32, A remote controller 40 for setting the remote control mode and the adjustment level of the screen voltage; A frequency multiplier 46 for converting the basic oscillation frequency signal oscillated by the oscillator 44 into various frequency multiplied signals, A controller 42 for selecting a frequency multiplication signal from the frequency multiplier 46 in response to the adjustment level in the remote control mode of the screen voltage; A frequency controller 48 for supplying a frequency multiplication signal selected by the controller 42 as a signal for adjusting the screen voltage; A first switching transistor 50 driven by a switching method in response to the adjustment signal of the screen voltage; And a transformer transformer 52 for generating a power that is transformed by the switching driving of the first switching transistor 50 to drive the second switching transistor 54 to adjust the screen voltage. Remote control device for television screen voltage. 2. The output of the variable resistor (36) according to claim 1, wherein the second switching transistor (54) has a base connected to the secondary side of the transformer transformer (52) to drive a current, and a collector thereof to the output side of the variable resistor (36) for generating the screen voltage. Remote control device for television screen voltage, characterized in that connected. The OSD processing unit 58 according to claim 1, wherein the OSD processing unit 58 generates an OSD signal for displaying the remote control mode of the screen voltage and the screen of the adjustment level under the control of the control unit 42. And a video processor (60) for reproducing the OSD signal on the CRT device.

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