KR100447853B1 - Auto tuning apparatus for a broadcast receiver, and a control method therof - Google Patents

Abstract

Disclosed are an image display apparatus and a method of controlling the same when auto tuning a broadcast receiving apparatus. In the automatic tuning according to the present invention, the image display apparatus includes a tuner for converting an RF signal into an IF signal, an IF processor for outputting an image signal by performing image detection on the IF signal, a switching block for separately outputting the image signal, and a separate output. A feature box for processing an image signal and outputting the image signal to a display device, a memory in which a predetermined video signal is stored, and a tuning start, and performing a tuning operation to store channel tuning information, and outputting the signal from the switching block to the feature box. To block the video signal stored in the memory to the feature box to control the display of the video signal, and if it is determined that the tuning is completed, the video signal is cut off and the channel tuning information is called to display the broadcast reception screen. And a microcomputer to control the display. Thus, an image by a predetermined video signal is displayed during tuning so that the user does not feel bored during tuning.

Description

Image display apparatus and automatic control method for automatic tuning of broadcast receiving apparatus {Auto tuning apparatus for a broadcast receiver, and a control method therof}

The present invention relates to an image display apparatus and an operation control method thereof during automatic tuning of a broadcast receiving apparatus, and more particularly, to an image display apparatus and an operation control method thereof during automatic tuning of a broadcast receiving apparatus to display an advertisement screen during tuning. It is about.

A broadcast receiving device such as a TV and a VCR includes a microcomputer that controls overall operation of the device, a tuning unit that receives and tunes a broadcast signal through an antenna or a cable, and an image of the broadcast signal tuned by the tuning unit. A video processor for processing a signal, a display device for receiving the processed video signal and displaying the same on a screen, a horizontal / vertical synchronization processor for deflecting the video signal to be displayed on a screen of the display device, and a character on a screen of the display device. An on-screen display (OSD) generating unit for displaying separately.

As shown in FIG. 1, a general automatic tuning device includes a tuner 10, an IF processor 20, a switching block 30, and a feature box 40.

The electronically tuned tuner tunes by connecting a variable capacitor diode in series to the open end of the coaxial resonator and supplying a tuning voltage corresponding to the receiving channel in the reverse direction. And a receiving block switching voltage generation circuit (voltage generation for changing reactance) for switching the electronic tuning tuner to a desired band. Therefore, the reception channel can be tuned (tuned) by setting the voltage.

By tuning the frequency of the circuit to the frequency (frequency band) assigned to the particular channel to be watched for tuning, resonance occurs and it is possible to detect a (voltage) signal of the transmitted broadcast wave. However, when the detected signal strength, i.e., the reception sensitivity, is poor, the regeneration of the original transmission signal is poor. It is the viewer's judgment that the reception sensitivity is bad, which can be quantified in decibels (dB).

Decibel is the first to describe the transmission attenuation of a telephone. It is generally a term that describes the attenuation or gain of an output voltage relative to an input voltage (or reference voltage). The reception sensitivity of the broadcast reception device is determined by the electric field strength of the broadcast signal propagated and the characteristics of the tuning circuit. Therefore, the reception sensitivity varies depending on the location of the broadcast signal, the channel selected, and the characteristics of the tuner.

In the conventional broadcast receiving apparatus, when the channel is automatically tuned, since the synchronization signal of the received RF signal is used, a screen that is shaken violently as shown in FIG. 4A is displayed due to an unstable synchronization signal during the tuning process.

Since there are usually 30 broadcast channels in the 100-channel band (about 10 channels with the reception sensitivity enough for actual viewing), it takes a considerable time to automatically tune the channels. Since the display, the viewer has a problem that the boredom and unpleasantness. In order to improve this problem, as shown in FIG. 4B, the first searched channel is displayed in the form of a still picture to display a severely shaken screen to make the user feel uncomfortable, but there is a problem in that the boredom of the viewer cannot be overcome.

The present invention has been made to solve the above problems, and an object of the present invention is to display a predetermined screen, especially an advertising screen during tuning, image display apparatus during automatic tuning of the broadcast receiving apparatus that can reduce the boredom of the viewer And to provide a control method.

1 is a block diagram schematically illustrating a video display device in a conventional automatic tuning;

2 is a block diagram showing an image display apparatus during automatic tuning according to the present invention;

3 is a flowchart illustrating an operation control method performed by an image display apparatus during automatic tuning of FIG. 2;

4A is a diagram illustrating an embodiment of a screen displayed on a display device while tuning by an image display device during conventional automatic tuning;

4B is a view showing another embodiment of a screen displayed on a display device while being tuned by the image display device during conventional automatic tuning, and

4C is a diagram illustrating an embodiment of a screen displayed on a display device while tuning by an image display device during automatic tuning according to the present invention.

Explanation of symbols on the main parts of the drawings

10: tuner 20: IF processing unit

30: switching block 40: feature box

50: micom

In the automatic tuning of the broadcast receiving apparatus according to the present invention for achieving the above object, the image display apparatus includes a tuner for receiving an RF signal and converting it into a viewable IF signal, receiving an IF signal from the tuner, and detecting an image thereof. An IF processor for outputting an AFT (Auto Frequency tuning) voltage to the tuner to maintain a constant oscillation frequency, a switching block that receives an image signal from the IF processor, separates and outputs a signal, and receives an image signal input from the switching block. When it is determined that tuning is started according to a feature box for processing an image and outputting the same to a display device, a memory in which a predetermined video signal is stored, and a signal applied from the tuner, a tuning operation is performed to store channel tuning information. Block the signal output to the feature box, The video signal is applied to the feature box to control the screen to be displayed by the video signal, and when it is determined that the tuning is completed, the video signal is cut off and the channel tuning information is loaded to display the broadcast reception screen. It characterized in that it comprises a microcomputer to control.

The video signal stored in the memory is preferably composed of a synchronization signal and an RGB signal forming a predetermined advertisement screen.

On the other hand, according to the present invention, a video display method for automatic tuning of a broadcast receiving device having a video display device during automatic tuning to tune and output a broadcast signal to the display device, a) receiving a broadcast signal to start channel tuning Determining whether the tuning is started; b) if it is determined that tuning is started in step a), storing tuning information by performing a channel tuning operation; and c) if it is determined that tuning is started in step a), tuning and inputting is performed. Blocking a signal output to a feature box that processes the video signal in a switching block that separates and outputs a video signal from a broadcast signal, and d) blocks a signal output from the switching block in step c), Inputting a video signal into the feature box; e) processing the video signal through the display device; Outputting, f) determining whether the tuning operation of step b) is completed, and g) if it is determined that tuning ends in step f), canceling the blocking in step c), There is provided a method of controlling an image display apparatus during automatic tuning of a broadcast receiving apparatus, the method including displaying channel broadcasting information stored in step b) and displaying a broadcast receiving screen.

Preferably, the predetermined video signal of step d) is composed of a synchronization signal and an RGB signal forming a predetermined advertisement screen.

In addition, in the step e), it is preferable that the tuning progress degree is displayed together with the predetermined video signal.

As a result, a predetermined video screen may be displayed until the tuning operation is completed during the automatic tuning operation.

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

2 is a block diagram schematically illustrating an image display apparatus during automatic tuning of a broadcast receiving apparatus according to the present invention. As shown, the automatic tuning device includes a tuner 10, an IF processor 20, a switching block 30, a feature box 40, a microcomputer 50, and a memory (not shown) in which an RF signal is received. do.

The tuner 10 receives a radio frequency (RF) signal and converts it into an intermediate frequency (IF) signal for viewing, and the IF processor 20 receives an IF signal from the tuner 10 and detects an image signal and a temperature. In order to prevent the oscillation frequency from being changed due to the change of the power supply voltage, an automatic frequency tuning (AFT) voltage is output to the tuner 10 so that the oscillation frequency is kept constant.

The switching block 30 receives an image signal from the IF processor 20 and separates and outputs a signal. The feature box 40 processes an RGB signal and a synchronization signal and displays the same through a display device. The memory stores a video signal composed of an RGB signal and a synchronization signal forming a predetermined screen, and may be included in the microcomputer 50 or configured separately.

The microcomputer 50 controls the entire system and is connected to the tuner 10 to determine whether to start tuning through a signal applied from the tuner 10, and when tuning is started, the microcomputer 50 is output from the switching box 40 to the feature box. Mute the line and apply the video signal stored in the memory to the feature box 40. In addition, when it is determined that the tuning is completed through the signal applied from the tuner 10, the microcomputer 50 blocks the video signal applied to the feature box 40 and is tuned by the tuner 10 and the IF processor 20. Loads the stored channel tuning information and controls the broadcast receiving screen to be displayed. The memory for storing the video signal may be included in the microcomputer 50 or may be separately installed and connected. The video signal may be composed of a still picture or a moving picture as an advertisement screen.

An operation control method, an operation, and an effect of the image display apparatus during automatic tuning of the present invention configured as described above will be described in detail with reference to FIG. 3.

First, the tuner 10 receives an RF signal and determines whether channel tuning is started (S10). If it is determined that tuning is started, the tuner 10 and the IF processor 20 perform a channel tuning operation to store tuning information (S30). In addition, when it is determined that the tuning starts, the output signal of the switching block 30 for separating and outputting the video signal input from the IF processor 20 is cut off (S20). While blocking the signal output from the switching block 30, a predetermined video signal stored in the memory is input to the feature box 40. The feature box 40 processes the video signal and outputs the processed video signal through the display device (S40). With the video signal while the video signal is displayed on the screen, the tuning completion degree is displayed by the OSD in the form of a bar bar as shown in FIG. 4C, allowing the viewer to determine the tuning progress.

If it is determined that the tuning operation is completed by the tuner 10 and the IF processor 20 (S50), the output signal of the switching block 30 is canceled and the video signal applied to the feature box 40 is blocked (S50). S60). The broadcast signal is applied to the feature box 40 so that the channel reception information stored by the tuning operation is loaded and the broadcast reception screen is displayed (S70).

Accordingly, when channel tuning is started, an advertisement screen based on the stored video signal is displayed, and when it is determined that channel tuning is completed, the channel is automatically switched to the broadcast screen by channel tuning information.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

According to the present invention, by controlling a predetermined video screen to be displayed during the automatic tuning operation of the broadcast receiving device, a screen which is severely shaken by an unstable sync signal is displayed so that the user does not feel uncomfortable or bored. In particular, the advertisement screen is displayed. By doing so, there is an advantage that can bring the effect of advertising.

Claims (5)

A broadcast receiving device including an automatic tuning device and outputting a channel tuned broadcast signal to a display device, A tuner that receives the RF signal and converts the signal into a viewable IF signal; An IF processor that receives an IF signal from the tuner, performs image detection on the IF signal, and outputs an AFT (Auto Frequency tuning) voltage to the tuner to maintain the oscillation frequency constant; A switching block receiving an image signal from the IF processor and separating and outputting a signal; A feature box for image-processing an image signal input from the switching block and outputting the image signal to the display device; A memory in which a predetermined video signal is stored; And If it is determined that tuning is started according to a signal applied from the tuner, a tuning operation is performed to store channel tuning information, and to block a signal output from the switching block to the feature box, and the video signal stored in the memory is stored. If the control is applied to the feature box to display the screen by the video signal, and when it is determined that the tuning is finished, the video signal is cut off, and the channel tuning information is called and the video signal in the switching block to the feature box And a microcomputer to input and control a broadcast reception screen to be displayed. The method of claim 1, And a video signal stored in the memory comprises a synchronization signal and an RGB signal constituting a predetermined advertisement screen. A control method of a broadcast receiving device including an automatic tuning device for tuning a broadcast signal and outputting the broadcast signal to a display device, a) determining whether channel tuning is started by receiving a broadcast signal; b) if it is determined in step a) that the tuning starts, performing a channel tuning operation to store tuning information; c) if it is determined that tuning is started in step a), blocking a signal output to a feature box for processing the video signal in a switching block that separates and outputs the video signal from the tuned and input broadcast signal; d) inputting a predetermined video signal to the feature box while blocking the signal output from the switching block in step c); e) processing and outputting the video signal through the display device; f) determining whether the tuning operation of step b) is completed; And g) if it is determined that the tuning is terminated in the step f), releasing the blocking in the step c), calling up the channel tuning information stored in the step b) and displaying a broadcast reception screen; A control method of a video display device during automatic tuning of a broadcast receiving device. The method of claim 3, And the predetermined video signal of step d) is composed of a synchronization signal and an RGB signal forming a predetermined advertisement screen. The method of claim 3, And in step e), the tuning progress level is displayed together with the predetermined video signal.