KR19980047362A - Mode switching method of TV system using channel adjustment key - Google Patents

Abstract

The present invention relates to a mode switching method of a television system using a channel adjustment key. In particular, when a channel adjustment signal is input through the channel adjustment key, it is determined whether the input channel adjustment signal is an uplink adjustment signal or a downlink adjustment signal, A first step (101 to 104) of determining whether the model is a mode switchable mode; and a second step (105 to 104) of determining whether the current mode of the television system is a video mode if the television system is a model capable of switching to a video mode in the first step; 106, a third step (107 to 108) for determining whether the received broadcast signal is the first channel or the last channel of the television system if the current mode of the television system in the second step is a television mode; and receiving in the third step. If the broadcast signal being the last channel of the television system and the input channel adjustment signal is the A fourth step 109 for switching the mode of the system to the video mode; and if the broadcast signal received in the third step is the first channel of the television system and the input channel adjustment signal is a down adjustment signal, the mode of the television system is changed to the video mode. With the fifth step 110 of switching to, the mode of the television system can be switched to the video mode or the television mode without a separate mode switching key.

Description

Mode switching method of TV system using channel adjustment key

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mode switching method of a television system, and in particular, a channel adjustment for switching a mode of a television system to a video mode or a television mode according to a channel adjustment signal inputted through a channel adjustment key mounted on a television system or a remote controller. A mode switching method of a television system using keys.

In general, a television system is a device for receiving a broadcast signal, such as news, music, entertainment, culture, sports, etc. consisting of a video signal and an audio signal transmitted through a transmission antenna of a broadcasting station and providing it to a viewer. Most television systems are equipped with video and audio input terminals for connection to a VCR so that the television system can watch the video signal reproduced on the tape. Also, the television system and the remote control broadcast the mode of the television system. A mode switching key is provided for switching to a television mode for processing a video mode or a video mode for processing a video signal reproduced on a tape.

However, in the low cost model, video and audio input terminals for connection with a VCR are not installed in the television system so as to process only broadcast signals received through the tuner. Therefore, the mode switching key should be added to or removed from the television system or the remote control according to the high or low cost model of the same model, that is, the installation of the terminals for connection with the VCR. Due to this, the manufacturer has to separately manage the material according to the model, and also there is a problem that the productivity of the product is reduced because the remote control is not used in common.

Accordingly, the present invention has been invented to solve the above problems, and the mode of the television system is switched to the video mode or the television mode according to the channel adjustment signal inputted through the channel adjustment key mounted on the television system or the remote control. It is an object of the present invention to provide a mode switching method of a television system using a channel control key capable of integrated management of materials and sharing a remote controller regardless of a high or low price model.

In order to achieve the above object, the present invention provides a method for controlling a television system. When a channel adjustment signal is input through a channel adjustment key, it is determined whether the input channel adjustment signal is an uplink adjustment signal or a downlink adjustment signal. A first step of determining whether the model is switchable to the video mode, a second step of determining whether the current mode of the television system is the video mode if the television system is a model capable of switching to the video mode in the first step, and in the second step A third step of determining whether the received broadcast signal is the first channel or the last channel of the television system if the current mode of the television system is the television mode; and the broadcast signal received in the third step is the last channel of the television system and input channel adjustment. If the signal is an upward adjustment signal, the mode of the television system is switched to the video mode. The key comprises a fourth step and a fifth step of switching the mode of the television system to the video mode if the broadcast signal received in the third step is an initial channel of the television system and the input channel adjustment signal is a down adjustment signal. It features.

1 is a block diagram schematically showing the configuration of a television system to which the present invention is applied;

2 is a flowchart showing a mode switching method of a television system according to the present invention;

3 is a view showing a channel conversion process of the television system when applying the present invention,

3A is a view illustrating a channel conversion process when no channel is memorized;

3B is a diagram illustrating a channel conversion process when there is a memorized channel.

Explanation of symbols on the main parts of the drawings

11: antenna 12: tuner

13: Image Intermediate Frequency Amplifier 14: Image Detector

15: mode switch 16: comb filter

17: luminance signal processing unit 18: color signal processing unit

19: matrix circuit part 20: water tube (CRT)

21: microcomputer 22: key input unit

23: remote control receiver

FIG. 1 is a block diagram schematically showing the configuration of a television system to which the present invention is applied. The tuner 12 selectively receives a broadcast signal desired by a viewer through an antenna 11 among broadcast signals output from a broadcasting station. It is connected to the intermediate frequency amplifier 13. The image intermediate frequency amplifier 13 amplifies the intermediate frequency signal output from the tuner 12 to 58.75 MHz for the video signal and 54.25 MHz for the audio signal in order to obtain stable amplification and necessary selectivity characteristics. The output signal of the image intermediate frequency amplifier 13 passes through the image detector 14 and is detected. At this time, the image signal is extracted from the image intermediate frequency signal, and the extracted image signal changes the mode of the television system to the video mode or the TV mode. It is applied to the comb filter 16 through the mode switch 15 for switching to.

The comb filter 16 extracts the luminance signal Y and the carrier color signal C from the applied image signal, and supplies the extracted luminance signal and the carrier color signal to the luminance signal processor 17 and the color signal processor 18, respectively. In this case, the luminance signal processing unit 17 amplifies the supplied luminance signal and outputs it to the matrix circuit unit 19. The color signal processing unit 53 extracts a color difference signal from the carrier color signal and outputs it to the matrix circuit unit 19. The matrix circuit unit 19, which receives the luminance signal output from the luminance signal processor 17 and the color difference signal extracted from the color signal processor 18, mixes both signals to form a primary color signal, and supplies the same to the receiving tube 20. On the other hand, the key input unit 22 and the remote control receiver 23 for the viewer to change the broadcast channel or mode of the television system are connected to the microcomputer 21 for controlling each component of the television system, and the microcomputer 21 is connected. The TV system is controlled by changing the received frequency of the tuner 12 according to the channel adjustment signal input through the key input unit 22 or the remote control receiver 23 to change the received broadcast channel or to control the mode switch 15. Mode is switched to video mode or television mode.

2 is a flowchart showing a mode switching method of the television system according to the present invention applied to the television system configured as described above.

When the user presses the channel adjustment key of the remote control or television system key input unit 22 (101), the microcomputer 21 determines whether the channel adjustment signal inputted through the channel adjustment key is an uplink adjustment signal or a downlink adjustment signal (102). . If the input channel adjustment signal is an upward adjustment signal, the microcomputer 21 determines whether the television system is a model capable of switching to the video mode (103). If the model cannot switch to the video mode, the tuner (in accordance with the input channel adjustment signal) 12, the received broadcast channel is adjusted upward by varying the receiving frequency (111). On the other hand, if the model can be switched to the video mode, it is determined whether the current mode of the television system is a video mode for processing the video signal reproduced from the tape (105) and the current mode is a television for processing the broadcast signal received through the tuner 12 In the mode, the receiving channel of the tuner 12 is changed according to the input channel adjustment signal to adjust the received broadcasting channel (111). If the current mode is the video mode, it is determined whether the received broadcasting channel is the final channel of the television system. (107).

If the received broadcast channel is not the final channel of the television system, the reception frequency of the tuner 12 is changed according to the input channel adjustment signal to adjust the received broadcast channel (111), and the received broadcast channel is If it is the last channel, the mode switch 15 is controlled to switch to the video mode (109). On the other hand, if the input channel adjustment signal is a down adjustment signal, the microcomputer 21 determines whether the television system can be switched to the video mode in the same manner as if the up adjustment signal is input (104). It is determined 106 whether the current mode of the television system is the video mode. If the current mode of the television system is the television mode, the microcomputer 21 determines whether the received broadcast channel is the first channel of the television system (108), and controls the mode switch 15 if the received broadcast channel is the first channel of the television system. Switch to the video mode (110). On the other hand, if the television system cannot switch to the video mode, or if the current mode of the television system is the video mode or the broadcast channel being received is not the first channel of the television system, the microcomputer 21 adjusts the tuner according to the input channel adjustment signal. 12, the received broadcast channel is adjusted downward by varying the receiving frequency (111).

3 is a diagram illustrating a channel conversion process of a television system in the case of applying the mode switching method as described above. FIG. 3A illustrates a channel conversion process when there is no memorized channel, and FIG. A diagram illustrating a channel conversion process.

As described above, the present invention switches the mode of the television system to the video mode or the television mode according to the channel adjustment signal inputted through the channel adjustment key mounted on the television system or the remote control. Integrated management is possible, and the remote control can be shared to increase the productivity of the product.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims (1)

In the control method of a television system, A first step (101 to 104) for determining whether the input channel adjustment signal is an uplink adjustment signal or a downlink adjustment signal when the channel adjustment signal is input through the channel adjustment key, and whether the television system is a model that can be switched to the video mode; A second step (105 to 106) determining whether the current mode of the television system is the video mode if the television system is the model switchable to the video mode in the first step; A third step (107 to 108) of determining whether the received broadcast signal is the first channel or the last channel of the television system if the current mode of the television system is the television mode in the second step; A fourth step (109) of switching the mode of the television system to the video mode if the broadcast signal received in the third step is a final channel of the television system and the input channel adjustment signal is an uplink adjustment signal; And a fifth step (110) for switching the mode of the television system to the video mode if the broadcast signal received in the third step is an initial channel of the television system and the input channel adjustment signal is a down adjustment signal. Mode switching method of a television system using control keys.