KR19980043987A - Apparatus and method for switching to two screens when receiving sensitivity is poor on television - Google Patents

Abstract

The present invention relates to an apparatus and method for switching to two screens in case of poor reception sensitivity in a television.

According to the apparatus and method for switching between two screens in case of a poor reception sensitivity in a television according to the present invention, when the AGC voltage of a tuner section that tunes a broadcast channel corresponds to a case where the reception sensitivity is low, the main picture is displayed until the reception sensitivity becomes normal. Is output to the sub-screen, and another broadcast is output to the main screen.

Description

Apparatus and method for switching to two screens when receiving sensitivity is poor on television

The present invention relates to an apparatus and a method for switching between two screens in case of a poor reception sensitivity in a television. In particular, when the AGC voltage of a tuner section for tuning a broadcast channel corresponds to a low reception sensitivity, the reception sensitivity becomes normal. The present invention relates to an apparatus and a method for converting a main screen to a sub-screen, and switching to a two-screen when reception sensitivity is poor in a television for outputting another broadcast to the main screen.

FIG. 1 is an internal configuration diagram of a conventional television. Referring to FIG. 1, a conventional television configuration includes a main screen tuner 11a in which a broadcast signal applied through an antenna ANT is controlled by a microcomputer 10. As shown in FIG. ) And the sub-screen tuner 11b respectively select a broadcast channel as the main screen signal and the sub-screen signal, and then detect them in the detectors 12a and 12b, and process the images in the image processor 13a and 13b. The video signal is provided to the switching unit 15, and the sub picture signal is configured to be provided to the switching unit 15 through the PIP processing unit 14.

The sub-screen video signal of the video signal processor 13b is converted into a digital signal through the A / D converter 14b inside the PIP processor 14, and then the timing control of the timing controller 14a is performed in the memory 14c. After the data is stored by the microcomputer 10, it is read again by the timing control of the timing controller 14a controlled by the microcomputer 10 and applied to the switching unit 15 through the D / A converter 14d. The switching unit 15 controls the switching operation by the microcomputer 10 so that the main screen video signal and the sub-screen video signal are displayed on the TV screen 16.

In the conventional television configured as described above, the current channel broadcast is continuously output even when the reception sensitivity becomes poor. When there is a lot of noise components such as an unpleasant video or audio, the viewer switches channels directly to another broadcast channel. In case of poor reception sensitivity, there is a problem in that there is no appropriate countermeasure.

The present invention has been made to solve the above problems and to achieve an improvement.

Accordingly, an object of the present invention is to output the main screen as a sub picture until the reception sensitivity becomes normal when the AGC voltage of the tuner section for tuning the broadcast channel corresponds to a case where the reception sensitivity is low. The present invention provides an apparatus and a method for converting to a two screen when the reception sensitivity is poor in a television for outputting a.

As a technical means for achieving the above object of the present invention, the apparatus for switching to two screens in the case of poor reception sensitivity in the television of the present invention is to tune to the broadcast channel applied through the antenna (ANT), respectively under the control of the microcomputer A main screen tuner and a sub-screen tuner, a detector for detecting a main screen signal and a sub-screen signal from the main screen tuner and a sub-screen tuner, an image processor for image processing signals from the detector, and the video A television comprising a PIP processing unit for PIP processing a sub picture signal from a processing unit, and a switching unit for selecting and outputting two signals from the image processing unit and the PIP processing unit to a TV screen according to the control of the microcomputer. Therefore, the voltage of one of AGC voltages from the main and sub-screen tuners is compared with a reference voltage set therein. AGC voltage detector that provides the comparison result to the microcomputer; If the signal from the AGC voltage detection unit corresponds to a poor reception sensitivity, the channel broadcast output to the main screen is controlled to be output to the sub-screen, and then the control is made to output another broadcast channel to the main screen. When the AGC voltage detection unit detects the AGC voltage of the sub-screen and the comparison result signal corresponds to the reception good, controls to output the channel broadcast output to the sub-screen as the main screen, and stops the channel broadcast output to the sub-screen. It is characterized in that it comprises a micom;

In addition, the method of switching to two screens in case of poor reception sensitivity in the television of the present invention as another technical fishery for achieving the above object of the present invention is to switch to two screens in accordance with the reception sensitivity in a television that provides a PIP function. In the method, when watching a broadcast on the main screen, the AGC voltage detector compares the AGC voltage received from the main screen tuner with the reference voltage according to the main screen AGC voltage detection control of the microcomputer. A first step of repeating the above process when the reference voltage is higher (good reception sensitivity), and informing the microcomputer that the reception sensitivity is poor when the AGC voltage is low; A second step of controlling to output the channel broadcast output on the main screen to the sub-screen in case of poor reception sensitivity, and to output another channel broadcast to the main screen; After the second step, according to the sub-screen AGC voltage detection control of the microcomputer, when the AGC voltage detector compares the AGC voltage received from the sub-screen tuner with the reference voltage, and then the AGC voltage is smaller than the reference voltage (reception sensitivity). In a bad state), repeating the above process, and informing the microcomputer that the reception sensitivity is good when the AGC voltage is high; A fourth step of controlling to output the channel broadcast output to the sub-screen to the main screen when the channel broadcasting state of the sub-screen is in a reception sensitivity-positive state, and to stop the output of the sub-screen; Characterized in that made.

1 is an internal configuration diagram of a conventional television,

2 is an internal configuration diagram of a television according to the present invention,

3 is a flowchart for explaining the method according to the present invention.

* Description of the symbols for the main parts of the drawings *

20: Micom 21a: main screen tuner

21b: sub-screen tuner 22a: main screen detector

22b: sub-screen detector 23a: main screen image processing unit

23b: sub-screen image processing unit 24: PIP processing unit

24a: timing controller 24b: A / D converter

24c: memory 24d: D / A converter

25: switching unit 26: TV screen

27: AGC voltage detector

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the apparatus for switching to two screens when the reception sensitivity is poor in a television according to the present invention.

FIG. 2 is an internal configuration diagram of a television according to the present invention. Referring to FIG. 2, in the television according to the present invention, a device for switching to two screens in case of poor reception sensitivity includes a broadcast channel applied through an antenna ANT. The main screen signal 11a and the sub-screen tuner 11b, which are tuned under the control of the microcomputer 10, and the main screen signal and the sub-screen signal from the main screen tuner 11a and the sub-screen tuner 11b, respectively. Detectors 12a and 12b to detect, image processing units 13a and 13b to image-process signals from the detectors 12a and 12b, and sub-screen signals from the image processor 13b. PIP processing unit 14 for PIP processing, and switching unit 25 for selecting and outputting two signals from the image processing unit 13a and PIP processing unit 14 to the TV screen 26 under the control of the microcomputer 20. ).

According to the control of the microcomputer 20, a voltage of one of the AGC voltage V _AGC from the main screen tuner 21a and the sub-screen tuner 21a is compared with a reference voltage V _R set therein. When the signal from the AGC voltage detection unit 27 and the AGC voltage detection unit 27 provide the comparison result to the microcomputer 20, the reception sensitivity is poor. After controlling the output to the main screen, another broadcast channel is output to the main screen, and after the AGC voltage detection section 27 detects the AGC voltage of the sub-screen and the comparison result signal corresponds to the reception goodness, The microcomputer 20 controls to output the channel broadcast output to the sub-screen to the main screen, and to control the channel broadcast output to the sub-screen to be stopped.

3 is a flowchart for explaining the method according to the present invention.

Operation according to the present invention configured as described above will be described in detail below based on the accompanying drawings.

Referring to Figs. 2 and 3, the TV according to the present invention operates according to the control of the microcomputer 20 and detects the tuned signals after channel tuning in the main picture tuner 21a. After detection by the unit 22a, the image processor 23a processes the image and outputs the image to the TV screen 26 through the switching unit 25.

When the main screen is watching the selected channel broadcast as described above, a method of switching to the two screens when the reception sensitivity according to the present invention is poor will be described. First, in the first steps 31 and 32, the microcomputer 20 is used. ) Commands the AGC voltage detector 27 to detect the AGC voltage on the main screen, the AGC voltage detector 27 detects the AGC voltage V _AGC from the main screen tuner 21a and then detects the AGC voltage. Compare the voltage (V _AGC ) with a reference voltage (V _R ) set therein in advance. When the AGC voltage is greater than the reference voltage (good reception sensitivity), the AGC voltage is input again and compared. If it is small, the microcomputer 20 will notify that the reception sensitivity is poor.

In the second steps 33 and 34, if it is determined that the reception sensitivity is poor, the microcomputer 20 outputs the channel broadcast output to the main screen to the sub picture, and the sub picture tuner 21b and the PIP processing unit. 24 and the switching unit 25, and at the same time, the main screen tuner 21a is controlled to output another channel broadcast to the main screen.

In the first step (31, 32) and the second step (33, 34), the channel broadcast that was watched on the main screen is not good reception sensitivity, first the screen of the TV screen is switched to two screens and then the reception The channel broadcast of the main screen having poor sensitivity is output as a sub-screen, and another channel broadcast set in advance is output to the main screen.

In this situation, when the microcomputer 20 commands the AGC voltage detector 27 to detect the AGC voltage for the sub-screen in the third step (35, 36), the AGC voltage detector 27 is a sub-screen tuner ( After detecting the AGC voltage (V _AGC ) from 21b), the detected AGC voltage (V _AGC ) is compared with a reference voltage (V _R ) set therein in advance, and when the AGC voltage is smaller than the reference voltage (receive) If the AGC voltage is input again and compared, and if the AGC voltage is large, the microcomputer 20 notifies the reception sensitivity.

In the fourth step (37, 38), if it is determined that the channel broadcast state of the sub-screen is a good reception sensitivity state, the microcomputer 20 outputs the channel broadcast output to the sub-screen to the main screen again. The screen tuner 21a and the switching unit 25 are controlled, and the sub-screen tuner 21b and the PIP processing unit 24 are controlled to stop the output of the sub-screen.

According to the present invention as described above, when the AGC voltage of the tuner section for tuning the broadcast channel corresponds to a case where the reception sensitivity is low, the main screen is output as a sub-screen until the reception sensitivity is normal, There is a special effect to output a different broadcast.

The above description is only a description of one embodiment of the present invention, the present invention is capable of various changes and modifications within the scope of the configuration. In addition, one of ordinary skill in the art will readily recognize that the apparatus and method for switching to two screens in case of poor reception sensitivity in the television are not limited to the above-described embodiment.

Claims (2)

The main screen tuner 11a and the sub-screen tuner 11b, and the main screen tuner 11a and the sub-screen tuner 11b respectively tune to the broadcast channel applied through the antenna ANT under the control of the microcomputer 10. Detectors 12a and 12b for detecting the main screen signal and the sub-screen signal from the video signal, and image processing units 13a and 13b for image processing the signals from the detectors 12a and 12b. PIP processing unit 14 for PIP-processing the sub picture signal from the image processing unit 13b, and two signals from the image processing unit 13a and PIP processing unit 14 are selected according to the control of the microcomputer 20 to display a TV. In a television comprising a switching unit 25 for outputting to a screen 26, According to the control of the microcomputer 20, a voltage of one of the AGC voltage V _AGC from the main screen tuner 21a and the sub-screen tuner 21b is compared with a reference voltage V _R set therein. An AGC voltage detector 27 providing the comparison result to the microcomputer 20; When the signal from the AGC voltage detector 27 corresponds to a poor reception sensitivity, the channel broadcast output to the main screen is controlled to be output to the sub-screen, and then the control is made to output another broadcast channel to the main screen. Then, when the comparison result signal after detecting AGC voltage of the sub-screen from the AGC voltage detection unit 27 corresponds to the reception good, it controls to output the channel broadcast output to the sub-screen to the main screen, to the sub-screen And a microcomputer 20 for controlling to stop the channel broadcasting output. In a television that provides a PIP function, a method of switching to two screens according to reception sensitivity, When watching a broadcast on the main screen, the AGC voltage detector 27 converts the AGC voltage V _AGC and the reference voltage V _R received from the main screen tuner 21a according to the main screen AGC voltage detection control of the microcomputer. After comparing the first step, if the AGC voltage is greater than the reference voltage (good reception sensitivity), the process is repeated, and if the AGC voltage is small, the first step of notifying the microcomputer 20 that the reception sensitivity is poor; A second step of controlling to output the channel broadcast output on the main screen to the sub-screen in case of poor reception sensitivity, and to output another channel broadcast to the main screen; After the second step, the AGC voltage detector 27 compares the AGC voltage V _AGC and the reference voltage V _R inputted from the sub-screen tuner 21b according to the sub-screen AGC voltage detection control of the microcomputer. A third step of repeating the process if the AGC voltage is lower than the reference voltage (received sensitivity failure), and notifying the microcomputer 20 that the reception sensitivity is good when the AGC voltage is large; A fourth step of controlling to output the channel broadcast output to the sub-screen to the main screen when the channel broadcast state of the sub-screen is in a reception sensitivity-good state; How to switch to two screens when the reception is poor in the television characterized in that it comprises a.