KR19980043991A - You can switch between the main and secondary screens. - Google Patents

Abstract

The present invention relates to a PIP television capable of switching between main / sub screens and a main / sub switching method thereof. When a channel search key is inputted, a sub-tuner controls the sub-tuner to tune a plurality of channels and stores the tuned channels. The sub screen is displayed together with the main screen, and the moving picture is sequentially displayed from the first sub-screen for a predetermined time. If the moving picture is displayed from the first sub-screen to the last sub-screen, the moving picture is displayed for the predetermined time sequentially from the first sub-screen. When a key is input, the sub screen displayed as the current video is displayed on the main screen, and the sub screen of the screen displayed on the previous main screen can be displayed to enlarge the sub screen, and the main screen is displayed on the sub screen without being erased. You can still check the contents of the lower screen, and it is easy when the contents of the subscreen do not satisfy the viewer. It can quickly revert to the original main screen and.

Description

PIP TV that can switch main / sub picture and main / sub switching method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PIP television capable of switching between main / sub screens and a main / sub switching method thereof. In particular, a plurality of still sub-screens are displayed together with the main screen, and a moving picture is sequentially displayed for a predetermined time from the first sub-screen. The sub-screen displayed as the main video is displayed on the main screen when the main / sub switching key is input, and the screen displayed on the previous main screen is displayed on the sub screen. The present invention relates to a PIP television capable of switching between sub-screens and a main / sub switching method thereof.

PIP screens are used to browse television channels. Since the PIP screen is displayed by the subtuner, only one screen is displayed as a moving picture when displaying a plurality of PIP screens.

1 is a block diagram showing the configuration of a television having a PIP screen function, and FIG. 2 is a conventional PIP screen.

The broadcast signal propagated through the air and received by the antenna ANT is applied to the main tuner unit 11 and the sub tuner unit 14. The main tuner unit 11 tunes and outputs a main screen signal, and the sub tuner unit 14 tunes and outputs a sub screen signal. The main screen detector 12 receives the main screen signal from the main tuner 11 and separates the video signal and outputs the video signal to the video signal processor 13. The sub-screen detector 15 receives the sub-screen signal from the sub-tuner 14 and separates the video signal and outputs the video signal to the PIP processor 16. The PIP processor 16 stores the video signal output from the sub-screen detector 15 and outputs the video signal to the video signal processor 13 at a predetermined time by a control signal. The image signal processing unit 13 separates the main screen signal into a color signal and a luminance signal and applies the same to the cathode ray tube 17 while the predetermined control signal is applied to the sub screen signal output from the PIP processing unit 16. 17), the sub screen is displayed on the main screen 21 as shown in FIG. The microprocessor 18 reads data and software programs stored in the memory unit 19 to control the PIP processing unit 16 to display a sub-screen in the main screen, and the main tuner unit 11 and the sub-tuner unit 14 ) To select a tuning channel and to control the respective parts.

As such, in the related art, one subscreen is displayed in the main screen, and thus, in order to search for a plurality of channels, the entire screen must be checked and displayed one by one on the subscreen. Since the subscreen size is small, it is difficult to grasp the contents of the subscreen. Increasing the size of the sub-screen reduces the number of sub-screens that can be displayed, and in the worst case, it is difficult to grasp the contents of the sub-screen or the main screen.

The present invention has been made to solve the above problems, and an object of the present invention is to change the position of the sub screen and the main screen to be displayed by changing the position of the main screen / sub-screen to quickly grasp the contents of the sub screen It is to provide a television and its main / sub-switching method.

Another object of the present invention is to provide a PIP television capable of switching between a main / sub picture which facilitates channel searching by easily and easily switching between a sub screen and a main screen, and a main / sub switching method thereof.

In order to achieve the above object, a device according to the present invention includes a main tuner unit and a sub tuner unit for tuning a broadcast signal received from an antenna, and a main screen signal and a sub screen from signals output from the main tuner unit and the sub tuner unit. A / D conversion of the main screen detector and sub-screen detector that detects and outputs the signal, and the sub-screen signal outputted from the sub-screen detector by the control signal, and stores the digital data in the video memory and reads it back. PIP processing unit for outputting, the main screen signal output from the main screen detection unit and the sub-screen signal output from the PIP processing unit to drive the cathode ray tube, and the channel search key is input a plurality of stop Displays the sub screen together with the main screen, displays each sub screen sequentially as a moving picture, and displays the current screen by the main / sub switching key. A sub-processor, which is displayed as an image, is replaced with a new main screen, and the main screen is provided with a microprocessor for controlling the respective units so as to display the sub-screen.

In the method according to the present invention, when a channel search key is input, the sub-tuner unit is controlled to tune a plurality of channels, and the stored channel is displayed by displaying the plurality of still sub-screens together with the main screen, and sequentially from the first sub-screen. If the last sub screen is displayed as a moving image for a predetermined time, it is displayed as a moving image for a predetermined time sequentially from the first sub screen, and if the main / sub switching key is input, the sub screen displayed as the current moving image is displayed on the main screen. The sub screen of the screen displayed on the previous main screen.

1 is a block diagram showing the configuration of a television having a PIP screen function.

2 is a conventional PIP screen.

3 is a PIP screen according to the channel search method according to the present invention.

4 is a block diagram showing the internal configuration of the PIP processing unit according to the present invention.

5 is a flowchart showing a main / sub conversion method of the IP television according to the present invention.

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

11.Main tuner section 12. Main screen detector

13. Image signal processor 14. Sub Tuner Section

15.Subscreen detector 16. PIP processing part

Cathode ray tube 18. Microprocessor

19. Memory section 42. A / D converter

43. Video Memory 44. D / A converter

45. Address generator 46. Multiplexer Section

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

A television having a channel search function using a PIP screen according to the present invention includes a main tuner unit and a sub tuner unit 11 and 14 for tuning a broadcast signal received from an antenna as in a conventional television, and the main tuner unit 11. And the main screen detector and the sub-screen detectors 12 and 15 for detecting and outputting the main screen signal and the sub-screen signal from the signals output from the sub-tuner 14 and the sub-screen detector by the control signal. A PIP processor 16 for A / D conversion of the sub screen signal outputted from (15), storing the digital data in a video memory, and reading and outputting the same; and a main screen signal output from the main screen detector 12 And the video signal processing unit 13 which receives the sub-screen signal output from the PIP processing unit 16 and drives the cathode ray tube 17 is the same.

However, the microprocessor according to the present invention performs the following functions by the software program stored in the memory 9. That is, the microprocessor 18 according to the present invention reads a software program from the memory unit 19, and when a channel search key is input, controls the subtuner unit to tune a plurality of channels and stores the tuned channels to stop a plurality of stops. The displayed sub screen together with the main screen, and the moving picture is sequentially displayed from the first sub-screen for a predetermined time. If the moving picture is displayed from the first sub-screen to the moving picture, the sub-screen is sequentially displayed from the first sub-screen for a predetermined time. When the switch key is input, the sub screen displayed as the current video is displayed on the main screen, and the screen displayed on the previous main screen is displayed on the sub screen.

The microprocessor 18 performs the following functions by a software program stored in the memory unit 19.

The microprocessor 18 according to the present invention reads a software program from the memory unit 19, receives a channel navigation key input, and displays seven sub-lowers 32-38 on the screen of the television as shown in FIG. Display.

The seven sub-screens are not absolute and are numbers selected to search for channels. When a channel search key is input, the microprocessor 18 controls the sub-tuner unit 14 to sequentially sequence the seven channels following the selected channel on the main screen. To tune in. The tuned signal is input to the PIP processor 16 through the sub-screen detector 15, A / D-converted, temporarily stored in each channel storage area, and then read again and output to the image signal processor 13. As shown in FIG. 7, the seven sub-screens 32-38 are displayed.

4 is a block diagram showing the configuration of the PIP processing unit.

When the sub-tuner 14 selects the first channel, the screen signal of the first channel is input to the A / D converter 42 through the sub-screen detector 15. The data output from the A / D changing section 42 is stored in the first channel region output from the address generating section 45 among the addresses of the video memory 43. The same operation is performed for the screen below the second channel. The video memory 43 receives the address data of the seven channels stored in this way from the address generator 45 and sequentially outputs the screen signal of the channel corresponding to the address to the D / A converter 44. The D / A converter 44 outputs the screen signals of the seven channels to the image signal processor 13 so that the lower surfaces 32-38 of the seven channels are displayed on the screen of the cathode ray tube 17 as the third diagram. . However, when the microprocessor 18 controls the multiplexer unit 46 and the address generator 45 to display the first channel screen 32 in a moving picture, the microprocessor 18 controls the multiplexer unit 46 in the sub-screen detector 15. The output signal is output to the image signal processor 13 without undergoing A / D conversion, storage, and D / A conversion by the PIP processing unit 16, and the screens 33-38 below the second channel are video memory 43 Reads data stored in each channel region of < RTI ID = 0.0 >) < / RTI > ).

Thus, by inputting the channel display key, the sub picture 32 of the first channel is displayed as a moving picture, and the sub picture 33-38 below the second channel is displayed as a still picture, and the moving picture is sequentially displayed for a predetermined time from the first sub picture. When the last sub screen is displayed as a moving picture, the first sub screen is sequentially displayed as a moving picture for a predetermined time, and the positions of the sub screen and the main screen are displayed by switching between the main and sub screens.

5 is a flowchart showing a channel searching method according to the present invention.

Since the initialization process of applying power and resetting the flag and various parameters to the initial value is a general matter, the description thereof will be omitted and the present channel searching method will be described. In step 501, it is determined whether the channel search key is on. If the channel search key is not in the ON state, repeat step 501. If the channel search key is in the ON state, the channel search key is checked in step 502 to check the tuned channel that is currently output to the main tuner unit 11. 7 channels following the main screen channel are sequentially tuned by the sub-tuner unit 14 for tuning, and the PIP processing unit 16 controls the screen of each channel for screen data of 7 channels. Is stored in the video memory 43 (see FIG. 4), the stored screen is read, D / A-converted and displayed on the seven sub-screens 32-38 as shown in FIG. In step 503, the moving image flag is set to one. In step 504, the sub-tuner unit 14 selects a channel of the sub picture corresponding to the moving picture flag value and displays the sub picture corresponding to the moving picture flag value as a moving picture. In step 505, it is determined whether the timer flag is 0 to determine whether a predetermined time has elapsed. If the predetermined time has not elapsed, step 504 is repeated to display the corresponding sub-screen as a moving image for a predetermined time. If the predetermined time has elapsed, it is determined whether the main / sub screen switching key is input in step 506. When the main / sub screen switching key is input, the sub screen (eg, sub screen 32) displayed as the current moving image is displayed as the main screen 31 in step 507, and the previous main screen is the sub screen 32. ) And proceed to step 508. If the main / sub screen switching key is not input, the process proceeds directly to step 508, where the video flag value is increased by one, and in step 509 it is determined whether the video flag value is seven. If the moving image flag value is not 7, the next sub-screen is displayed as a moving image by repeating step 504, and if the moving image flag value is 7, the step 503 is repeated to display a moving image again from the first sub-screen.

As described above, according to the present invention, the sub screen displayed as the current moving picture is displayed on the main screen by the input of the main / sub switching key, and the screen displayed on the previous main screen is displayed on the sub screen to enlarge the sub screen. Since the main screen is not erased and displayed on the sub screen, the contents of the main screen can be continuously checked, and if the contents of the sub screen do not satisfy the viewer, the main screen can be easily and quickly returned to the original main screen.

Claims (2)

In a television with a channel search function, A main tuner unit and a sub tuner unit for tuning the broadcast signal received from the antenna; A main screen detector and a sub-screen detector for detecting and outputting a main screen signal and a sub-screen signal from the signals output from the main tuner and the sub-tuner; A PIP processor for A / D converting the sub picture signal outputted from the sub picture detector by a control signal, storing the digital data in a video memory, and reading and outputting the digital data; An image signal processor configured to receive a main screen signal output from the main screen detector and a sub screen signal output from the PIP processor to drive a cathode ray tube; When the channel search key is input, a number of still sub-screens are displayed together with the main screen, each sub-screen is displayed as a video in sequence, and the sub-screen displayed as the current video by the main / sub switching key is displayed as a new main screen. And a main processor having a microprocessor for controlling each unit so as to replace the main screen with the sub screen. In the television channel search method, When the channel search key is input, the sub-tuner controls to select a plurality of channels, stores the tuned channels, displays the plurality of still sub-screens together with the main screen, and displays them as moving images for a predetermined time sequentially from the first sub-screen. When the last sub screen is displayed as a moving picture, it is displayed again as a moving picture for a predetermined time sequentially from the first sub screen, and when the main / sub switching key is input, the sub screen displayed as the current video is displayed on the main screen and the previous main screen is displayed. A method of switching between a primary and secondary screen of a PIP television, which is displayed on a sub screen of a displayed screen.