KR200156319Y1 - Image control prohibition device in no signal channel - Google Patents

Abstract

The present invention relates to a device for suppressing a screen adjustment function on a signal-free channel that prevents screen adjustment from being performed on a signal-free channel where a normal broadcast signal is not received, and generates a predetermined color tone signal and a luminance signal from a composite video signal. In addition, a television receiver having image processing means adapted to adjust color, brightness, contrast, and tint of an image screen output through a CRT according to an analog quantity control signal, the adjustment means for adjusting the analog control amount by a viewer; Storing the analog control amount set by the adjusting means, synchronizing signal detecting means for detecting a synchronizing signal from the composite video signal, and controlling the image processing means based on the analog control data stored in the storing means; In addition, the analog control amount adjustment signal by the adjustment means Is input, characterized in that it comprises a control means for executing a data update process for the storage means based on the detection result by the synchronization signal detection means.

Description

Disabling the screen adjustment function on no signal channel

1 is a block diagram showing the main components of a general television.

Figure 2 is a block diagram showing the main configuration of the screen adjustment function inhibiting device in a no-signal channel according to the present invention.

3 is a flow chart for explaining the operation of the device of the configuration of FIG.

* Explanation of symbols for main parts of the drawings

1: antenna 2: tuner

3: IF amplification part 4: P / S separation part

5: voice detector 6: image detector

7: switching unit 8: voice processing unit

9: voice amplifier 10: image processor

11: remote control device 12: receiver

13, 100: control unit 14: OSD generation unit

15 mixer 16 CRT drive unit

17: channel memory 18: external AV device

101: synchronization signal detection unit

The present invention relates to a television (hereinafter referred to as a TV), and more particularly to a device for inhibiting a screen adjustment function in a non-signal channel that can not perform the screen adjustment on a non-signal channel that does not receive a normal broadcast signal.

1 is a block diagram showing the main configuration of a general TV.

In the drawing, reference numeral 1 is an antenna, 2 is a tuner for tuning a predetermined broadcast signal from a broadcast signal received through the antenna 1 under the control of the control unit 13 to be described later, and 3 is a tuner 2 IF amplification section for amplifying the IF signal output from the (4), 4 is a surface acoustic wave for separating the image intermediate frequency signal (PIF) and the audio intermediate frequency signal (SIF) from the IF signal output from the IF amplifier (3), for example P / S separation part such as filter.

Further, reference numeral 5 denotes an audio detector for detecting an audio signal from the SIF signal, 6 denotes an image detector for detecting an image signal from the PIF signal, and 7 denotes an image detector 6 and an audio detector 5 And a switching unit for selectively outputting the video and audio signals of the broadcast signal detected in the < RTI ID = 0.0 >) < / RTI >

Although reference numeral 8 is not shown for the voice signal applied by the switching unit 7, voices such as bass, treble, volume, and the like according to a control signal from the control unit 13. 9 is a voice amplifier which amplifies the audio signal processed by the voice processor 8 and outputs it to the speaker.

In addition, reference numeral 10 denotes a color, tint, brightness, etc. according to a control signal from the controller 13 although not illustrated for the image signal output from the switching unit 7. The image processing unit outputs R (Red), G (Green), B (Blue), and luminance (-Y) signals corresponding to the image signal.

Further, reference numeral 11 denotes a remote control unit for selecting a channel desired by the viewer or performing TV / AV mode switching, etc. 12 denotes a receiving unit for converting an infrared signal from the remote control unit 11 into an electrical code signal, 13 A control unit for controlling the entire device in accordance with the remote control signal from the remote control device 11, 14 is an OSD generating unit for generating OSD pattern data for displaying the operation status of the TV to the viewer.

Also, reference numeral 15 denotes color tone signals (R, G, B) and luminance (-Y) signals output from the image processor 10 and R, G, B, and OSD blanking output from the OSD generator 14. A mixer for mixing and outputting the signal Y ', 16 is a CRT driver for driving a CRT based on the R, G, B and luminance (-Y) signals output from the mixer 15, 17 is predetermined channel data. Is stored in the channel memory, and 18 is an external AV device such as a VCR.

That is, in the above-described TV, when the viewer operates the TV using the remote control device 11, the control unit 13 controls the tuner 2 or the switching unit 7 so that the broadcast signal or the external AV device ( By outputting the video or audio signal from 18 through the CRT, the viewer can watch the desired program.

By the way, the following problem arises in the structure mentioned above.

That is, in the above-described TV, if the viewer desires regardless of the no-signal state or the no-signal state, the color, contrast, sharpness, and brightness of the video screen output on the analog control amount of the TV, that is, on the CRT, by using the remote control device 11. It is possible to adjust the varnish, etc. If the viewer adjusts the analog control amount in the no signal state, it is difficult to make an accurate adjustment because the image adjustment must be performed in the noise screen state. Therefore, when the analog control amount is adjusted in such a noisy screen state, the analog control amount is adjusted again in the presence of a signal, and thus there is a problem that the adjustment work is cumbersome.

When a child or a user who is not familiar with the remote control operates a predetermined function key (not shown) to perform screen adjustment on a non-signal channel, the existing viewer adjusts the data. In order to watch a program in the room, a cumbersome problem of re-adjusting the screen adjustment data changed by the child or the like occurs.

Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a screen adjustment function prohibiting device in a non-signal channel that does not allow screen adjustment to be performed in a non-signal channel in which a normal broadcast signal is not received. .

The apparatus for suppressing a screen adjustment function in a no-signal channel according to the present invention for realizing the above object generates a predetermined color tone signal and a luminance signal from a composite video signal and also outputs a video screen through a CRT according to an analog amount control signal. A television receiver comprising image processing means adapted to adjust the color, brightness, contrast and tint of an apparatus, the television receiver comprising: adjusting means for adjusting the analog control amount by a viewer, and storing means for establishing an analog control amount set by the adjusting means. And a control signal for detecting the synchronization signal from the composite video signal, and controlling the image processing means based on the analog control data stored in the storage means. In this case, based on the detection result by the synchronization signal detecting means. And control means for executing a data update process for the storage means.

According to the present invention having the above-described configuration, the screen adjustment by the viewer is prevented from being performed in the non-signal channel in which the synchronization signal is not detected based on the synchronization signal.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

2 is a block diagram showing the main components of the screen adjustment function inhibiting apparatus in the non-signal channel according to an embodiment of the present invention, the same reference numerals are attached to the same parts as in FIG. 2 and the detailed description thereof will be omitted. .

In the drawing, reference numeral 101 denotes a synchronization signal detector for detecting a synchronization signal from the composite image signal output from the image detector 6, and when a synchronization signal is detected, a high signal is output to the controller 102. If a synchronous signal is not detected, a LOW signal is output.

Reference numeral 102 denotes a control unit for controlling the apparatus as a whole. If the synchronization signal is not detected by the synchronization signal detection unit, it is possible to control screen adjustment, for example, brightness, tint, contrast, and the like.

Reference numeral 103 denotes a data storage unit for storing analog control data such as brightness, tint, color, contrast, etc. for controlling the image processor 10.

Next, the operation of the device having the above configuration will be described with reference to the flowchart shown in FIG.

When the TV is turned on (step ST1) and the viewer selects a screen adjustment, for example, brightness, tint, contrast, etc. using a predetermined function key (not shown) (step ST2), the control unit 102 synchronizes the synchronization. It is determined whether a synchronization signal is detected with respect to the result signal input from the signal detector 101 (step ST3).

Subsequently, the controller 101 does not perform the screen adjustment when the low signal is applied from the synchronization signal detector 101 (step ST4), and applies a predetermined control signal to the image processor 10 when the high signal is applied. Normal screen adjustment is performed (ST5 step).

That is, when the predetermined analog control mode is selected by the remote control device 11, the controller 102 reads out the corresponding setting data from the data storage 103 and displays it on the CRT through the OSD generator 14; In addition, the data storage unit 103 is updated and registered by varying the data value according to the up / down key operation of the remote controller 11. After that, the image processor 10 is controlled based on the updated data.

Therefore, according to the embodiment described above, the screen adjustment is not performed even when the viewer operates a predetermined function key (not shown) for executing the screen adjustment in the state where no signal channel is tuned. This makes it possible to prevent the screen output state from deteriorating.

In addition, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

As described above, according to the present invention, it is possible to realize a device for inhibiting a screen adjustment function on a signal-free channel in which screen adjustment cannot be performed on a signal-free channel in which a normal broadcast signal is not received.

Claims (1)

(Correction) is provided with image processing means for generating a predetermined color tone signal and a luminance signal from the composite video signal and adjusting the color, brightness, contrast and tint of the video screen output through the CRT according to the analog quantity control signal. In one television receiver, adjustment means for adjusting the analog control amount by a viewer, storage means for storing the analog control amount set by the adjustment means, synchronization signal detection means for detecting a synchronization signal from the composite video signal, and When the analog control amount adjustment signal is inputted by the adjustment means, the synchronization signal detection means detects the synchronization signal from the composite video signal, and when the synchronization signal is detected, updates the analog control data stored in the storage means and updates the image based on this. To control the processing means and to detect no sync signal And the control means for blocking the analog control amount adjustment signal so as not to execute the screen adjustment function.