KR100216917B1 - Screen image size converting apparatus for television - Google Patents

Abstract

The present invention divides a video screen that is responsible for output reproduction of a video signal into a plurality of video sections, and when a predetermined section is selected among the divided video sections, horizontal / vertical centering on the selected video section. The present invention provides a screen size adjusting device for each video section of a television, which enables the screen size of the video screen to be enlarged by varying the deflection state.

To this end, the present invention oscillates by the horizontal / vertical synchronization signal from the composite video signal according to the television broadcast separated by the synchronization separating unit 20, so that the image screen is displayed on the horizontal / vertical deflection coils 74 and 102 of the CRT 18. FIG. In a television equipped with horizontal / vertical deflection driving units (22,24) for generating horizontal / vertical deflection pulses for horizontal / vertical deflection adjustment of the display, the screen is adjusted to the CRT (18) screen by setting the screen resizing mode. Screen for a plurality of video sections selectable by the function setting means 26 and key setting for selecting a predetermined video section in which the screen size is desired to be adjusted among the plurality of video sections. A memory means 40 storing horizontal / vertical deflection adjustment data for adjusting the horizontal / vertical deflection of the horizontal / vertical deflection coils 74 and 102 so that the deflection state of the video screen is changed to adjust the size; The horizontal / vertical deflection state is varied by the horizontal / vertical deflection adjustment data from the memory means 40 to adjust the screen size for a predetermined image section selected under the screen resizing mode executed by the means 26. A display graphic showing a state in which the CRT 18 screen is divided into a plurality of video sections by the control means 42 for performing a control to perform a control to execute the screen size adjustment mode by the control means 42 and the control means 42. A horizontal deflection output to the horizontal deflection driving unit 22 by receiving the horizontal deflection adjustment data from the memory means 40 under the control of the display signal processing means 44 and the control means 42 which perform signal processing A horizontal deflection control signal generating means 46 for generating a horizontal deflection control signal for varying states, and a vertical direction from the memory means 40 under the control of the control means 42; And a vertical deflection control signal generating means (48) for receiving the deflection adjustment data and generating a vertical deflection control signal for varying the vertical deflection output state with respect to the vertical deflection driving unit (24).

Description

Screen size adjusting device for each video section of TV

The present invention relates to a screen size adjusting device for each video section of a television, and more particularly, to a video screen reproduced through a CRT on a television by a predetermined video section, and to a screen size for a section selected among the divided video sections. The present invention relates to a screen size adjusting device for each video section of a television, which enables to enlarge.

Nowadays, in the television which is generally used, a predetermined channel is selected from a plurality of channels which are carried in the form of airwaves from a plurality of television stations through a tuner, and then R / G / B is processed through intermediate frequency conversion, amplification, and video / audio signal processing. The video and audio signals in the form of signals are reproduced through the CRT and the speaker, respectively.

In the case of the R / G / B signal reproduced through the CRT of such a television, the desired image is obtained by irradiating the R / G / B fluorescent surface through the shadow mask as an image scanning beam by the R / G / B electron gun, respectively. As such, in order to scan the image scanning beam radiated from the R / G / B electron gun to the correct deflection position, vertical / horizontal deflection operation by the vertical / horizontal deflection coils installed in the CRT is required.

Meanwhile, in the case of the vertical / horizontal deflection coil, a deflection operation is performed by receiving a vertical / horizontal deflection drive pulse generated from the vertical / horizontal deflection circuit. The vertical deflection circuit is used to deflect the vertical deflection coil. In this case, the vertical oscillation operation is performed by the integral value of the vertical synchronization signal separated from the composite video signal, so that the sawtooth voltage can be generated and applied as a vertical deflection pulse. In the case of the horizontal deflection circuit, the oscillation operation is performed by the horizontal synchronization signal. By applying the sawtooth wave current generated by detecting the phase difference between the oscillation voltage and the frequency of the horizontal synchronization signal to the horizontal deflection coil, and adjusting the horizontal deflection, It also allows the generation of operating power or the anode / focus current of the CRT.

However, in the vertical / horizontal deflection operation of the image scanning beam through the vertical / horizontal deflection coil of such a television, it is fixed by a constant vertical / horizontal deflection drive pulse generated as a result of oscillation operation based on the horizontal / vertical synchronization signal. Because the vertical / horizontal deflection operation is performed, even if the viewer wants to enlarge the viewing area of the predetermined screen area or screen while watching a predetermined broadcast program, the adjustment of the screen size of each section or area of the corresponding video screen is difficult. Since this is impossible, there is a disadvantage in that the activeness of viewing is excluded.

Accordingly, the present invention has been made in view of the above circumstances, and when a video section that is responsible for output reproduction of a video signal on a television is divided into a plurality of video sections, and a predetermined section is selected among the divided video sections. Another object of the present invention is to provide a screen size adjustment device for each video section of a television, which can enlarge a screen size of a video screen by changing a horizontal / vertical deflection state based on the selected video section.

In order to achieve the above object, according to the screen size adjusting device for each video section of the present invention, the oscillation operation is performed by the horizontal / vertical synchronization signal from the composite video signal according to the television broadcasting separated by the synchronization separating unit. In a television equipped with a horizontal / vertical deflection drive unit for generating horizontal / vertical deflection pulses for horizontal / vertical deflection adjustment of a video screen in each horizontal / vertical deflection coil, the screen is adjusted to the CRT screen by setting the screen resizing mode. Function setting means for performing key setting for selecting a predetermined video section in which the screen size is desired to be adjusted among the plurality of video sections, and for adjusting the screen size for a plurality of video sections selectable by the function setting means. Horizontal / vertical deflection adjustment for adjusting the horizontal / vertical deflection of the horizontal / vertical deflection coil so that the deflection state of the image screen is changed. Horizontal / vertical deflection state by the horizontal / vertical deflection adjustment data from the memory means for adjusting the screen size for a predetermined image section selected under the memory means in which data is stored and the screen resizing mode executed by the function setting means. Control means for performing control to vary the control function; and performing signal processing for displaying a display graphic indicating a state in which the CRT screen is divided into a plurality of video sections by execution control of the screen size adjustment mode by the control means. Horizontal deflection control signal generating means for receiving a horizontal deflection adjustment data from the memory means under the control of the display signal processing means and the control means and generating a horizontal deflection control signal for varying the horizontal deflection output state to the horizontal deflection driving unit. And from the memory means under the control of the control means. Provided is a screen size adjustment apparatus for each image section of the television comprising a vertical deflection control signal generating means for receiving a vertical deflection adjustment data to generate a vertical deflection control signal for varying a vertical deflection output state to the vertical deflection driving unit. .

According to the present invention configured as described above, the television divides the CRT screen into a plurality of video sections, and when a predetermined video section is selected among the divided video sections by the key operation of the viewer, the horizontal / vertical deflection output state is displayed. By controlling the variable to vary the horizontal / vertical deflection state of the image scanning beam by the horizontal / vertical deflection coil, the screen size is adjusted around the selected image section.

1 is a block diagram showing a screen size adjustment device for each video section of a television according to the present invention;

2 is a schematic diagram showing an example of partitioning an image section for adjusting a screen size according to a preferred embodiment of the present invention;

3 is a block diagram showing the detailed configuration of the horizontal deflection driving unit and the horizontal deflection control signal generating unit shown in FIG. 1 according to a preferred embodiment of the present invention;

4A to 4C are waveform diagrams illustrating a state in which the horizontal deflection drive signal is variably generated by the horizontal deflection control from the horizontal deflection control signal generator shown in FIG. 3 according to a preferred embodiment of the present invention;

5 is a block diagram showing a detailed configuration of the vertical deflection driving unit and the vertical deflection control signal generating unit shown in FIG. 1 according to a preferred embodiment of the present invention;

FIG. 6 is a waveform diagram illustrating a state in which a vertical deflection drive signal is variably generated by vertical deflection control of the vertical deflection control signal generation unit shown in FIG. 5 according to an embodiment of the present invention;

7A and 7B are schematic views illustrating an example in which a screen size for an image screen is enlarged for each image section according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

2: reception antenna, 4: tuner,

6: video IF unit, 8: mode switching unit,

10: image detector, 12: image amplifier,

14: video signal processing unit, 16: video output unit,

18: CRT, 20: synchronization separation unit,

22: horizontal deflection driving unit, 24: vertical deflection driving unit,

26: function setting section, 40: data memory,

42: control unit, 44: OSD signal processing unit,

46: horizontal deflection control signal generator, 48: vertical deflection control signal generator.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a screen size adjustment device for each video section of a television according to the present invention. In the apparatus of the present invention, reference numeral 4 denotes a channel channel for tuning a predetermined channel from the control unit 42, which will be described later. It receives the data and tunes the corresponding channel among the plurality of channels induced in the receiving antenna (2) and amplifies the RF signal, and also mixes the local oscillation frequency signal and the RF signal oscillated by the channel tuning data to the intermediate frequency. A tuner for outputting in the form of a signal is shown, and 6 denotes an image IF unit which performs video intermediate frequency amplification processing on the selected TV frequency signal in the form of the selected intermediate frequency signal.

Also, reference numeral 8 is controlled by a control unit 42, which will be described later, for example, an external video signal which reproduces recorded information of a video recording medium such as a video tape or a video disc from an external video player such as a video tape recorder or a video disc player. B) a mode switching unit for performing a selective mode switching on the television broadcasting signal from the video IF unit 6, 10 denotes an image detecting unit for detecting only the composite video signal by detecting the intermediate frequency-amplified television broadcasting signal, 12 shows an image amplifying unit which amplifies the detected composite video signal to an amplification level capable of image processing.

Further, reference numeral 14 separates the luminance signal and the color difference signal from the signal-amplified composite video signal, and synthesizes the result as an R / G / B signal through luminance adjustment processing and color demodulation processing of the luminance signal. In addition, the video signal processing unit for synthesizing and outputting an OSD graphic signal for displaying a state of partitioning a predetermined video section from the OSD signal processing unit 44 to be described later with the R / G / B signal, 14 is An image output unit for amplifying the R / G / B signal and the OSD graphic signal generated as a result of the image signal processing and reproducing them on the screen of the CRT 16 is shown.

Reference numeral 20 denotes a synchronization separator which separates a composite synchronization signal from the composite image signal from the image amplifier 12 and extracts a horizontal / vertical synchronization signal, and 22 denotes an oscillation operation by the extracted horizontal synchronization signal. Denotes a horizontal deflection driver for generating a horizontal deflection drive signal for adjusting the deflection of the horizontal scan with respect to the R / G / B electron beam of the CRT 18, wherein 24 is oscillated by the extracted vertical synchronization signal. A vertical deflection driver for generating a vertical deflection drive signal for adjusting the deflection of the vertical scan with respect to the R / G / B electron beam of the CRT 18 by performing an operation.

In addition, reference numeral 26 is composed of a matrix button unit provided in a predetermined portion of the remote control for the remote control or the main body of the main body, and sets the command to perform the overall function operation, such as switching the broadcast channel, volume control, etc. Is a function setting section for performing a key operation for selecting a predetermined video section whose screen size is to be enlarged among a plurality of video sections partitioned on the screen of the CRT 18 by execution of. A selection key consisting of a screen resizing mode key 28 for setting the execution state of the screen resizing mode key and four directions for performing a selection operation for selecting a plurality of image sections partitioned on the screen of the CRT 18 ( 30, 32, 34, 36 and setting keys 38 for setting keys for determining the enlargement adjustment state of the screen size for a predetermined video section selected by the selection keys 30, 32, 34, 36; Pho It is configured to.

Reference numeral 40 denotes a horizontal / vertical deflection state of the image screen reproduced in the CRT 18 for the enlargement adjustment of the screen size for the plurality of image sections selectable by the key setting of the function setting unit 26. Represents a data memory in which horizontal / vertical deflection adjustment data are stored for changing the upper left deflection or the upper right deflection or the lower right deflection or the lower left deflection.

Further, reference numeral 42 is a control unit which controls the overall function operation assigned to the television according to the key setting state of the function setting unit 26. The control unit 42 is a key of the function setting unit 26. Recognizing a predetermined video section under execution of the screen resizing mode selected according to the setting, and by the horizontal / vertical deflection adjustment data from the data memory 38, the horizontal by the horizontal / vertical deflection coils 74 and 102. In order to change the vertical deflection state, data read control of the data memory 38 and enable control and switching control of the horizontal / vertical deflection control signal generators 42 and 43 described later are performed.

Reference numeral 44 denotes a plurality of video sections, such as A to D video sections, for the CRT 18 screen as shown in FIG. 2, in accordance with execution control of the screen size adjustment mode by the controller 42. An OSD signal processing unit for performing OSD display processing to form an OSD display graphic for partitioning the display into graphics, wherein the OSD signal processing section 44 selects selection keys 30, 32, 34, and 36 of the function setting section 26. Signal processing is performed to vary the display graphic color for the video section to be moved and selected in response to the operation state.

In addition, reference numeral 46 denotes that the operation is enabled by the control unit 42 to receive the horizontal deflection adjustment data from the data memory 40, so as to receive a predetermined image section selected by the function setting unit 26. A horizontal deflection control signal generator for generating a horizontal deflection control signal for varying the horizontal deflection of the horizontal deflection coil 74 to enlarge and adjust the screen size.

Here, the horizontal deflection control signal generation section 46 includes a data register 82 for temporarily storing horizontal deflection adjustment data from the data memory 38 and the data register 82 as shown in FIG. The operation is enabled by the data decoder 84 and the controller 42 which decodes the horizontal deflection adjustment data and generates a counting control signal for varying the phase of the horizontal oscillation according to the bias of the video screen. A counter circuit 84 for generating a counting output that variably counts the clock signal CLK inputted by the counting control signal from the data decoder 84, and receives the horizontal synchronizing signal from the synchronous separator 20. A pulse phase shift unit 88 for generating a horizontal synchronizing pulse in which the phase of the pulse is shifted by a counting output signal varied according to the deflection from the counter circuit 86; And an oscillation phase adjusting unit 90 for generating oscillation by a horizontally synchronized pulse of which the phase is variably shifted to generate a horizontal deflection control signal for varying the horizontal deflection of the video screen.

At this time, the horizontal deflection control signal generation unit 46 includes a horizontal selection switch unit 92 that is controlled to be controlled by the control unit 40, and by the AFC circuit 66 of the horizontal deflection drive unit 20. The horizontal deflection drive signal is compared with the phase of the horizontal synchronous signal and the horizontal deflection output signal, oscillated by the oscillation circuit 68 and driven and output by the horizontal drive circuit 70, or horizontal from the oscillation phase adjustment unit 90. Switching is provided to provide a signal path for selectively applying the deflection control signal to the horizontal output circuit 72.

On the other hand, the horizontal deflection control signal generator 46 matches the horizontal retrace period by the horizontal synchronization signal as shown in FIG. 4A when the screen size adjustment mode by the function setting unit 26 is not executed. The deflection pulse of the horizontal deflection drive signal is lowered so as to return the image scanning beam.

In addition, the horizontal deflection control signal generation unit 46 is the screen size adjustment mode is executed by the function setting unit 26 when the screen size adjustment for a predetermined video section is selected, Figs. 4b and 5c As shown in Fig. 2, the falling deflection pulse of the horizontal deflection drive signal is generated to be out of a predetermined period with respect to the horizontal retrace period due to the horizontal synchronous signal by the pulse phase shifting operation by the pulse phase shift unit 88. The phase shift of the vertical deflection drive signal with respect to the horizontal retrace period of the horizontal synchronization signal is abruptly made so that the falling deflection pulse is out of a considerable period with respect to the horizontal retrace period. As a result, the screen size is reduced for the screen region by the phase shift operation of the horizontal deflection drive signal, but the screen size is relatively large in the case of the image section selected for the adjustment of the screen size.

Also, reference numeral 48 is controlled by the controller 42 to receive a vertical deflection adjustment data from the data memory 40 and to display a screen for a predetermined image section selected by key setting of the function setting unit 26. A vertical deflection control signal generator for generating a vertical deflection control signal for varying a vertical deflection size with respect to the vertical deflection coil of the CRT 16 for adjusting the size.

Here, the vertical deflection control signal generator 48 includes a data register 104 for temporarily storing vertical deflection adjustment data from the data memory 38, and the data register 104 as shown in FIG. A data decoder 106 which decodes the vertical deflection adjustment data and generates a vertical deflection adjustment signal for varying the vertical deflection state of the vertical deflection coil 102 according to the degree of declination of the video screen, and the decoded vertical deflection. PWM modulation unit 108 for processing pulse width modulation (Pulse Width Modulation), integrating circuit 110 for integrating the pulse width modulated vertical deflection adjustment signal as a DC component, horizontal by applying a horizontal synchronization signal The number of reset counters 112 for counting the retrace period so as to apply a reset signal to the data decoder 106 and the integrating circuit 110 to enable a reset output per one video scanning period. A subtraction circuit 114 which receives the vertical oscillation frequency signal according to the oscillation result from the vertical oscillation circuit 94 of the linear deflection driver 22 and subtracts the vertical deflection adjustment signal integrated through the integration circuit 110. And a signal amplifying circuit 116 for amplifying the vertical oscillation signal output as a result of the subtraction process and outputting the vertical oscillation signal as a vertical deflection control signal.

At this time, the vertical deflection control signal generation unit 48 includes a vertical selection switch unit 118 that is controlled to be controlled by the control unit 42, and the vertical deflection control signal generation unit 48 has a vertical synchronization signal through the vertical oscillation circuit 94. The oscillation is performed and a vertical deflection drive signal applied through the amplification and waveform shaping operation of the amplifying shaping circuit 96 and the driving operation of the vertical driving circuit 98, or the vertical deflection control signal through the signal amplifying circuit 116 is performed. The switching operation is selectively performed to apply the vertical deflection coil 102 through the conduction operation of the vertical output circuit 100.

In addition, the vertical deflection control signal generator 48 subtracts the vertical size by the vertical deflection drive signal according to the result of the subtraction of the signal component by the subtraction circuit 114, as shown in FIG. The reset operation is performed per one image scanning period (1H) by the reset signal generated as a result of the counting of the horizontal synchronization signal of the reset counter 112, and the signal subtraction is performed for each image scanning period. .

Next, the operation of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, a television broadcast signal tuned from the tuner 4 and converted into an intermediate frequency signal is amplified by the image intermediate frequency through the image IF unit 6, or is a video tape or an external video reproducing apparatus such as a video tape recorder or a video disc player. When an external video signal reproduced from an image recording medium such as a video disc is applied, the mode switching unit 8 allows the intermediate frequency signal or the external video signal of the television broadcast to selectively pass under the switching control of the control unit 42. The mode switching operation is performed, and the image detector 10 detects and separates a composite video signal from an intermediate frequency television broadcast signal or an external video signal through the mode switch 8 and separates the image signal processor 14. In the present invention, the composite image signal amplified by the image amplifier 12 is processed as an image signal and output as a composite image signal in the form of R / G / B signal. Accordingly, the image scanning beam by the R / G / B signal is scanned on the CRT 18 through the amplification operation of the image output unit 16.

At this time, the oscillation circuit 68 of the horizontal deflection driver 22 performs the oscillation operation by the horizontal synchronizing signal separated from the composite video signal by the synchronizing separator 20, and the horizontal synchronizing signal by the AFC circuit 66. And the horizontal output circuit 72 performs the output drive under the driving of the horizontal drive circuit 70 through the phase control between the horizontal deflection drive signal and the heater current and the focus current of the CRT 18 from the flyback transformer 76. The same high pressure is generated and the horizontal deflection adjustment of the image scanning beam scanned on the CRT 18 by the horizontal deflection coil 74 is performed, while the vertical oscillation circuit 94 of the vertical deflection driver 24 is The vertical oscillation operation is performed by the vertical synchronization signal separated by the synchronization separating unit 20, and the vertical driving circuit 98 is driven by the amplification shaping circuit 96 through the amplification operation and the waveform shaping operation. Vertical driving while circuit 100 is driven The vertical deflection adjustment for rosacea image Im on the CRT (18) will be written on the coil 102. The

In this state, when the screen size adjustment mode key 28 of the function setting section 26 is key operated, the control section 42 controls the OSD signal processing section 44 to display, for example, A as shown in FIG. The OSD display graphic 50 indicating a state partitioned into a plurality of video sections, such as a -D video section, is displayed on the screen.

At this time, the selection keys 30, 32, 34, and 36 in the four directions of the function setting section 26 are set after selecting, for example, the D video section from among the plurality of video sections such as the A to D video section. When the key 38 is operated, the control section 42 recognizes the selection state for screen size adjustment of the D video section by the key operation of the function setting section 26, accesses the data memory 40, and accesses the D memory. The horizontal / vertical deflection adjustment data for expanding and adjusting the screen size of the image section is read out and output, and the horizontal / vertical selection switch units 92 and 118 constitute the horizontal / vertical deflection control signal generators 46 and 48. Will be switched on.

On the other hand, the horizontal deflection control signal generator 46 decodes the horizontal deflection adjustment data from the data memory 40 temporarily stored through the data register 82 as a counting control signal. The counter phase 86 causes the counting value for the clock signal CLK to be varied and output so as to correspond to the bias of the video screen, and the pulse phase shift unit 88 is output from the counter circuit 86. The pulse phase shift of the horizontal synchronous signal can be performed by a variable counting signal, while the oscillation phase adjusting unit 90 performs the oscillation operation by the horizontal pulse signal of which the pulse phase is shifted, thereby providing the horizontal deflection control signal. As the horizontal selection switch unit 92 is applied to the horizontal output circuit 72, the horizontal deflection coil 74 passes through the output drive of the horizontal output circuit 72. The horizontal deflection adjustment state of is varied.

Further, in the vertical deflection control signal generator 48, the vertical deflection adjustment data from the data memory 40 temporarily stored by the data register 104 is decoded by the data decoder 106 to decode the vertical deflection adjustment signal. And a vertical deflection adjustment signal whose pulse width is modulated by the PWM modulator 108 is integrated into a DC component through the integrating circuit 110, but the horizontal synchronous signal of the reset counter 112 A reset signal is generated in units of one image scanning period by the counting operation for the horizontal retrace period, thereby resetting the operations of the data decoder 106 and the integrating circuit 110.

Accordingly, the subtraction circuit 114 of the vertical deflection control signal generation unit 48 receives the vertical oscillation signal according to the vertical oscillation result of the vertical oscillation circuit 94 constituting the vertical deflection driving unit 22 and the integration circuit. The subtraction operation on the vertical deflection adjustment signal according to the integration result of 110 is performed in one image scanning period, while the signal amplification circuit 116 converts the subtracted vertical oscillation signal as a vertical deflection control signal. As the vertical output circuit 100 is applied to the vertical output circuit 100 through 118, the vertical deflection coil 102 is applied to the image scanning ratio on the CRT 18 through the variable output drive of the vertical output circuit 100. The vertical deflection is adjusted.

Accordingly, the horizontal / vertical deflection adjustment through the horizontal / vertical deflection coils 74 and 102 is variably performed by the horizontal / vertical deflection control signals generated from the horizontal / vertical deflection control signal generators 46 and 48. As shown in FIG. 7A, as the deflection state of the lower right screen is enlarged and changed compared to the upper left side of the CRT 18 screen, the screen size for the D image section is enlarged.

On the other hand, in the above-described embodiment of the present invention, the horizontal / vertical deflection control signal is selected even when the A video section is selected from among the A to D video sections shown in FIG. 2 by the key setting of the function setting section 26, for example. As the generators 46 and 48 perform the same operations as those of the above-described embodiment, the deflection state of the upper left screen is enlarged and changed as compared to the lower right side of the CRT 18 screen as shown in FIG. 7B. The screen size for the video section is enlarged, and the magnification adjustment operation of the screen size is equally applied to the remaining B and C video sections.

According to the present invention made as described above, it is possible to divide the video screen to be reproduced on the CRT in the television into a plurality of video sections and to enlarge and adjust the screen size for a predetermined video section selected by the viewer, As the partial screen size can be adjusted for the desired screen area, the convenience of viewing is increased.

Claims (3)

The oscillation operation is performed by the horizontal / vertical synchronization signal from the composite video signal according to the television broadcasting separated by the synchronization separating unit 20, so that the horizontal / vertical deflection of the video screen is applied to the horizontal / vertical deflection coils 74 and 102 of the CRT 18. In a television equipped with horizontal / vertical deflection driving units 22,24 for generating horizontal / vertical deflection pulses for adjustment, A function setting means 26 for performing key setting for selecting a predetermined video section from which a screen size is desired to be adjusted among a plurality of video sections divided for the CRT 18 screen by setting a screen size adjusting mode; Horizontal for adjusting the horizontal / vertical deflection of the horizontal / vertical deflection coils 74 and 102 such that the deflection state of the video screen is changed to adjust the screen size for a plurality of image sections selectable by the function setting means 26. Memory means (40) storing the vertical / vertical deflection adjustment data; The horizontal / vertical deflection state by the horizontal / vertical deflection adjustment data from the memory means 40 to adjust the screen size for a predetermined image section selected under the screen resizing mode executed by the function setting means 26. Control means 42 for controlling to vary the Display signal processing means for performing signal processing such that a display graphic showing a state in which the CRT 18 screen is divided into a plurality of image sections is executed by execution control of the screen size adjustment mode by the control means 42; 44), Under the control of the control means 42, the horizontal deflection adjustment data from the memory means 40 is applied to generate a horizontal deflection control signal for varying the horizontal deflection output state to the horizontal deflection drive unit 22. Control signal generating means 46, and Under the control of the control means 42, the vertical deflection adjustment data from the memory means 40 is applied to generate a vertical deflection control signal for varying the vertical deflection output state to the vertical deflection drive unit 24. And a control signal generating means (48). 2. The horizontal deflection control signal generating means (46) according to claim 1, further comprising: a data register (82) for temporarily storing horizontal deflection adjustment data from said memory means (40), and a horizontal deflection through said data register (82). The data decoder 84 which generates the counting control signal for the pulse phase variation of the horizontal deflection by decoding the adjustment data, and the counter circuit 86 which variably counts the clock signal CLK by the counting control signal according to the decoding result. ), A pulse phase shift unit 88 for shifting the phase of the sync pulse based on a variable counting value from the counter circuit 86 by receiving a horizontal sync signal from the sync separator 18, and the phase being variable Oscillation phase adjustment unit 90 for generating a horizontal deflection control signal by oscillating operation so that the phase is changed by the shifted horizontal synchronization pulses, and switching control by the control means 42 Air picture on the television screen by sections sizing device, characterized in that configured by a horizontal selection switch unit 92 for switching operation to the horizontal deflection coil 74 is the horizontal deflection control signal to be selectively supplied. 2. The vertical deflection control signal generating means (48) according to claim 1, wherein said vertical deflection control signal generating means (48) temporarily stores vertical deflection adjustment data from said memory means (40) and vertical deflection through said data register (104). A data decoder 106 for decoding the adjustment data to generate a vertical deflection adjustment signal, a PWM modulator 108 for performing pulse width modulation on the decoded vertical deflection adjustment signal, and performing the pulse width modulated vertical deflection adjustment signal. An integrating circuit 110 for integrating with a DC component, a reset counter for counting the horizontal synchronizing signal to generate a reset signal in units of one image scanning period, and for resetting the data decoder 106 and the integrating circuit 110. 112), a subtraction circuit 114 for receiving a vertical oscillation signal oscillated by the vertical deflection driver 24 and subtracting the vertical deflection adjustment signal from the integrating circuit 110; Signal amplification circuit 116 which amplifies a vertical oscillation signal and generates a vertical deflection control signal, and is controlled by the control means 42 to selectively supply the horizontal deflection control signal to the vertical deflection coil 102. And a vertical selection switch unit (118) for switching so as to be configured.

Images