KR0180342B1 - Image control prevention apparatus of television no-signal channel - Google Patents

Abstract

The present invention relates to a screen adjustment prevention device in a TV broadcasting no signal channel,

Conventionally, although the channel switched during TV broadcasting channel switching is a broadcast non-signal channel, even when the user selects the screen condition adjusting function, the channel is output as it is, but this is a meaningless function.

According to the present invention, when a screen state adjustment function is selected by a user's operation when a broadcast signal is detected for a switched channel and a broadcast signal is not detected, the warning is not performed without executing the function. By presenting the text on the screen, it is an invention that can take a follow-up action to change the user's broadcast-free signal channel.

Description

Screen adjustment prevention device in TV broadcasting no signal channel

1 is a schematic block diagram of a TV receiver apparatus of the present invention.

2 is an operational flow diagram according to the control state of the present invention.

* Explanation of symbols for main parts of the drawings

10: tuner 11: amplifier

12: separator 13: voice detector

14: voice processing unit 15: voice amplifier

16 speaker 17 image detector

18: image processing unit 19: mixer

20: CRT driving unit 21: CRT

22: OSD generation unit 23: broadcast signal detection unit

30: remote control device 31: receiver

100: microprocessor

The present invention relates to an apparatus for preventing screen adjustment on a TV broadcast non-signal channel, and more particularly, even if a screen adjustment function is set on a channel of a broadcast no signal by switching the TV broadcast channel, The present invention relates to an apparatus for preventing picture adjustment on a TV broadcast-free signal channel, in which a function for an image output adjustment level such as contrast, tint, and the like is not operated.

In general, the microprocessor provided in the TV receiver is configured to execute a control operation for the entire apparatus based on a user's operation command through a remote controller operation or a control program set in itself. In the configuration, the IF amplifier output from the tuner which tunes the broadcast signal of the channel selected by the user among the broadcast signals received through the antenna for receiving the broadcast signal, and the IF signal output from the IF amplifier P / S separation unit configured to separate the image intermediate frequency signal (PIF) and the audio intermediate frequency signal (SIF) from the surface acoustic wave filter, and the SIF signal output from the P / S separation unit. And a video detector for detecting a video signal from the PIF signal.

In addition, a voice processor for performing voice processing such as bass, treble, balance, etc. on the voice signal detected by the voice detector according to a predetermined control signal from a microprocessor; An audio amplifier which amplifies the audio signal processed by the processor and outputs the audio signal to the speaker connected to the rear stage is provided.

On the other hand, according to a predetermined control signal from a microprocessor, the image signal output from the image detector is subjected to image processing such as color (Colo9r), tint (Bint), brightness (Brghtness) to correspond to the image signal The CRT driver is configured to drive the CRT 12 based on the RGB signal output from the image processing unit 10 that outputs R (Red), G (Green), and B (Blue) signals.

Here, the user is operated by a remote control device for remotely controlling the operation of the overall device, through the receiving unit for converting the far-infrared signal transmitted to the electric code signal for the overall device in accordance with the remote control signal from the remote control device It is equipped with a microprocessor that executes control operations.

That is, in the device having the above-described configuration, the microprocessor outputs a predetermined control signal corresponding to the user's remote control operation through the corresponding port for adjusting the video output of the user, and a corresponding signal is generated according to the control signal. The image processor is controlled as an integrated signal, so that the user can watch TV by adjusting the image output states such as brightness, contrast, and tint through a remote controller to set the screen output state according to his or her preference. .

In the above case, however, the screen adjustment mode can be set for a broadcast channel that receives TV broadcast. However, the screen adjustment mode is required for a channel that does not receive TV broadcast. There was a case of adjusting the screen in the channel, which means nothing, and when switching to a broadcasting signal channel, the screen adjustment operated in the non-signal channel is reflected as it is. It was.

Accordingly, the present invention has been made in view of the above-mentioned problems of the prior art, and even when the screen adjustment function is selected in the broadcast no signal channel, the operation thereof is not performed, and the warning text is displayed as the OSD text on the CRT screen. It is an object of the present invention to provide an apparatus for preventing screen adjustment on a TV broadcast-free signal channel for displaying an output.

A television receiver according to the present invention for realizing the above object is a television receiver having a microprocessor for controlling the operation of the apparatus as a whole, and an image processor for adjusting an image output based on a predetermined control signal from the microprocessor. In

A broadcast signal detection unit for detecting a broadcast signal transmitted from a broadcast station, an OSD text generation unit for outputting it as OSD characters on the screen by controlling the overall apparatus of the user, and a broadcast signal for a channel selected by the microprocessor The present invention provides a device of the present invention by disabling a signal for setting the image when a signal is detected and no signal is determined.

Hereinafter, with reference to the accompanying drawings will be described in detail the technical configuration for achieving the object of the present invention.

1 is a screen adjustment prevention device in a TV broadcast non-signal channel of the present invention, reference numeral ANT is an antenna for receiving a broadcast signal transmitted from a broadcasting station, 10 is a station for the broadcast signal received from the antenna A tuner for tuning a channel, 11 denotes an amplifier for amplifying the tuner signal, and 12 denotes a separation between an image intermediate frequency and an audio intermediate frequency in the amplified signal.

Reference numeral 13 denotes a voice detector for detecting a voice signal, 14 a voice processor for processing a signal for the voice detector, 15 denotes a voice amplifier for amplifying the voice signal through the speaker 16, and outputting the voice signal. 17 is an image detector for detecting an image signal from a signal output from the separating unit, reference numeral 18 is an image processor for processing the signal of the image detector and outputting it based on an RGB signal, and 19 is output from the image processor. 20 is a CRT driver for driving the CRT 21 by outputting the RGB and luminance signals and a signal intended to be output from the OSD generator 22.

Further, reference numeral 30 denotes a remote control device for remotely controlling the entire apparatus, and the remote control device is provided with volume / channel buttons and number buttons from 0 to 9.

Reference numeral 31 is a receiver that receives the infrared signal transmitted from the remote control device 30 and converts it into an electrical code signal, and 100 is a microcontroller that controls the entire apparatus based on the code signal applied from the receiver. Processor.

On the other hand, reference numeral 22 is an OSD generator for displaying the overall operation state and key input by the user in a predetermined OSD pattern on the screen, 23 is a broadcast signal detection unit for detecting a broadcast signal transmitted from a broadcasting station will be.

Referring to the embodiment and the operation and effects of the present invention configured as described above are as follows.

When the user switches channels through the remote control device 30 while watching TV, the broadcast signal detection unit 23 detects a broadcast signal with respect to a channel that is switched first, and then controls a channel for which a broadcast signal is not detected. 30 or the panel formed on the front of the TV receiver ignores the screen state setting function by the operator's manual operation.

That is, in the channel where the broadcast signal is not caught as described above, for example, CH8, when the user selects the screen state setting function formed on the remote control device 30 and presses its control button, the microprocessor 100 detects this. When the broadcast signal is not received, it is displayed on the screen of the CRT 21 as an OSD character, but a message indicating that it is not a broadcast channel or the screen adjustment setting is impossible is transmitted.

As a result, the user can take the action of changing the channel by checking the text, thereby preventing a malfunction due to the user's use of the remote control device 30.

In order to implement such an operation, as shown in FIG. 2, when watching a TV (ST1), when a channel is switched (ST2), a step of detecting whether a broadcast signal is received for the switched channel (ST3) When the broadcast signal is received by the step of watching TV, and if the broadcast signal is not received, the screen state setting mode is detected through the remote control device 30 through the step (ST4), the screen state When the setting mode is selected, the operation of the present invention is implemented as a step ST5 in which the warning text is output to the OSD and the button input of the remote controller 30 is not performed.

As described above, in the present invention, when a broadcast signal is not detected for a changed channel when changing a channel of a TV receiver, even if a user's screen state setting function is selected, the present invention is not performed. It is an invention that has been made.

Claims (1)

The video signal according to the television broadcasting of the predetermined channel tuned through the tuner 10 is image-processed by the image processing means 17, 18, 19 and 20, and the image is reproduced. 13) In a television receiver that is voice-processed and reproduced by voice by (14), (15) and (16), is a broadcast signal for a channel changed through the channel switching step (ST2) in the viewing step (ST1) of the TV received? Detecting (ST3), detecting that the user's screen setting mode is selected in a state in which no broadcast signal is detected (ST4), and if the screen setting mode is selected in the above step ST4, And ignoring the signal and transmitting the warning text on the screen of the CRT (ST5).