KR19990069916A - How to switch the sub / main screen of TV - Google Patents

Abstract

The present invention relates to a sub-screen / main screen switching method of the TV to switch from the multi-PI screen to the main screen, conventionally the channel search through the PIP screen while switching the PIP screen to the main screen sub-screen It is inconvenient to try to view the sub picture contents as the main screen because the channel of the main screen must be watched by directly inputting the channel number of the main screen. Therefore, according to the present invention, a selection signal checking step of determining whether a user selection signal is a main / sub switching or a PI search according to whether a current PI channel is searched, and if a desired channel is present in the selection signal checking step, is displayed on the current main screen. A housewife data switching step of switching data and data displaying PIP, a multi PIP processing step of performing PIP processing by the housewife data switching and PIP search command, and a cursor position by a user. Cursor position movement processing step of moving and checking the moved position, and cursor position display step of displaying the cursor position clearly by displaying the cursor position as the border using the on-screen display. User's convenience by switching the screen directly to the main screen It will be reduced to one.

Description

How to switch the sub / main screen of TV

According to the present invention, while watching a main screen and searching for a channel using a PIP screen, if the viewer has a desired channel, the subscreen / main of the TV enables the user to directly switch the desired channel to the main screen. The present invention relates to a screen switching method, and more particularly, to a sub-screen / main screen switching method of a TV, which enables the user to conveniently switch channels from a sub screen to a main screen.

1 is a circuit configuration diagram of a TV having a conventional multi-pipe (MULTI-PIP) function, and as shown therein, one for displaying a main screen in a broadcast signal, which is a plurality of high-frequency signals received by an antenna ANT. A main screen tuner 1 for tuning a broadcast signal of a sub-screen, a sub-screen tuner 2 for tuning one broadcast signal for display as a sub-screen from the plurality of broadcast signals, and the main screen tuner 1 Separates and demodulates the video signal from the broadcast signal output from the audio processing unit (3) and the broadcast signal output from the main screen tuner (1). A main screen image processing unit 5 for displaying on the Citi 6, and a sub screen image processing unit 7 for separating and demodulating and outputting a video signal from a broadcast signal output from the sub-screen tuner 2 ), And for the subscreen The PIP processing unit 8 performs a PIP (Picture In Picture) process on the signal transmitted from the image processing unit 7 and outputs the PIP color signal (PIP RGB) to the main image processing unit 5. And a remote control receiver 10 which receives an infrared signal corresponding to the key signal and outputs a pulse thereof when the user presses a desired key using the remote controller 11, and a pulse output from the remote controller receiver 10. The microcomputer recognizes the function through the central processing unit 12 and controls each of the necessary parts, and outputs the edge to the image processing unit 5 for the main screen by making a frame or the like using the on-screen display unit 13. It consists of (9).

Looking at the prior art configured as described above is as follows.

When the viewer presses a key corresponding to a desired channel through the remote controller 11 to watch the TV, infrared rays corresponding to the key are generated and transmitted to the remote controller receiver 10.

The remote control receiver 10 then receives the infrared rays and outputs the pulses corresponding to the infrared rays to the microcomputer 9.

Accordingly, the central processing unit 12 of the microcomputer 9 recognizes the desired channel viewing by the input pulse and outputs the channel data to the main picture tuner 1.

Accordingly, the main screen tuner 1 tunes one broadcast signal corresponding to a corresponding channel among a plurality of broadcast signals received through the antenna ANT to the voice processor 3 and the main screen image processor 5, respectively. Output

Therefore, the audio processor 3 separates the audio signal from the input broadcast signal and sends it to the speaker 4, and the main screen image processor 5 separates the video signal from the input broadcast signal and demodulates the signal. 6) to display the image.

In this way, while watching the main screen, when the viewer wants to search the channel using the PI function, the viewer presses the PI on key of the remote controller 11.

Then, the infrared rays corresponding to the keys are emitted to the remote controller 11, and the infrared rays are received by the remote controller receiver 10 to generate an appropriate pulse waveform and output to the microcomputer 9.

Accordingly, the central processing unit 12 of the microcomputer 9 controls the on-screen display unit 13 to display an on-screen display color signal (OSD RGB) for displaying nine sub-screens as shown in FIG. 3. Output to the image processing unit 5 for processing.

Then, the main screen image processing unit 5 processes the video signal output from the main screen tuner 1 and the color signal (OSD RGB) output from the on-screen display unit 13 to output to the Citiity 6, The screen 6 has a screen as shown in FIG.

That is, as shown in FIG. 2, nine sub-screens 200 are displayed on one main screen 100.

At this time, as shown in Figure 3 of the nine sub-screen ⓐ screen flashes.

The viewer then presses the PI search, i.e., the channel search key, of the remote controller 11.

The sub-screen tuner 2 tunes one of the broadcast signals corresponding to the channel among the plurality of broadcast signals received through the antenna ANT to the sub-screen image processing unit 7.

The sub-screen image processing unit 7 separates and demodulates an image signal from an input broadcast signal and outputs the demodulated signal to the IP processing unit 8.

Accordingly, the IP processing unit 8 outputs the color signal R.G.B, which has been subjected to signal processing, to the main screen image processing unit 5 so as to display the sub screen.

Then, on the screen through the Citi 6, the screen ⓐ of the main screen and the nine sub-screens are displayed.

And when the viewer presses the right direction (→) key when searching for another channel, ⓐ screen flickering moves the screen to the right and ⓑ screen flickers.

In this way, the viewer browses channels using nine screens.

If there is a channel that the user wants to watch among the channels searched in this way, the viewer remembers the channel and eliminates the sub picture.

Then press the channel switch key several times on the main screen to find the desired channel or press the number key that corresponds to the channel to find the channel.

However, in the prior art as described above, to switch to the searched channel after searching the channel through several sub-screens using the PIP function while watching the main screen, after switching to the main screen and pressing the channel switching key or the numeric key immediately Since the channel must be switched, there is a problem that inconveniences the user.

Therefore, an object of the present invention for solving the conventional problems as described above is to search for a channel using a plurality of sub-screens, if there is a desired channel, the channel on the sub-screen can be switched directly to the main screen and displayed It is to provide a sub-screen / main screen switching method of the TV.

Another object of the present invention is to provide a sub-screen / main screen switching method of the TV to facilitate the user by switching the channel from the sub-screen to the main screen immediately.

1 is a circuit diagram of a TV having a conventional MULTI-PIP function.

2 is a screen configuration diagram in which a sub-screen is floated on the main screen in FIG.

3 is a screen configuration diagram showing a sub-screen in FIG. 2;

Figure 4 is a circuit diagram of a TV that can be switched between the present invention sub-screen / main screen.

FIG. 5 is a screen configuration diagram showing a part in which the current cursor position is highlighted in FIG. 4. FIG.

6 is an operation process diagram for the sub-screen / main screen switching method of the present invention TV.

FIG. 7 is a flowchart illustrating an operation of a multi-pip processing step in FIG. 6.

8 is a flowchart illustrating an operation of a cursor position movement processing step in FIG. 6;

FIG. 9 is a flowchart illustrating an operation of displaying a cursor position in FIG. 6.

*** Explanation of symbols for main parts of drawing ***

101: main screen tuner 102: sub-screen tuner

103: image processing for the sub-screen 104: IP processing unit

105: microcomputer 106: remote control receiver

107: remote control 108: the main image processing unit

109: CI 110: input / output interface unit

111: central processing unit 112: RAM

The present invention for achieving the above object is a selection signal checking step of determining whether the user selection signal is the main / sub-switched or the IP search according to whether the current PIP channel search, and if there is a desired channel in the selection signal confirmation step, A housewife data switching step of switching the data displayed on the main screen and the data displaying the PI to each other; a multi-PI processing step of performing multi-PI processing by the housewife data switching and IP search commands; Cursor position shift processing step of moving the cursor position by and checking the moved position, and cursor position display step of displaying the cursor position clearly by displaying the moved cursor position as a frame using the on-screen display. Characterized in that consisting of.

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

FIG. 6 is a flowchart illustrating an operation of a sub-screen / main screen switching method according to the present invention. As shown in FIG. 6, it is determined whether a user selection signal is main / sub switching or IP search according to whether a current PI channel is searched. A housewife data switching step of switching between a selection signal checking step and a selection signal checking step, the data currently displayed on the main screen and the data displaying the IP, and the housewife data switching and PI searching A multi-PI processing step of performing a multi-PI processing by a command, a cursor position moving processing step of moving a cursor position by a user and checking the moved position, and an on-screen display for the moved cursor position Cursor position display stage to display the cursor position clearly by using a border It consists of.

FIG. 7 is an operation flowchart of the multi-IP processing step in FIG. 6. As shown in FIG. 6, a current channel processing step of reading data to be displayed on the multi-PI from a tuner and displaying the data at a corresponding position, and the above-described display. Move to the next position from the position to the next position, the position of moving the IP position for storing the channel data for the position, and the next channel processing step of reading the stored channel data from the tuner to display in the corresponding position and then ends Is done.

FIG. 8 is an operation flowchart of the cursor position shift processing step of FIG. 6. As shown in FIG. 6, a cursor position shift key confirming step of checking whether an input key value is a command for cursor shift, and the cursor position Is a movement position checking step of determining whether the movement key command is up, down, left, or right, and a cursor position storing step of storing the determined cursor position.

FIG. 9 is a flowchart illustrating an operation of the cursor position display step of FIG. 6, as shown in FIG. 6, a current position data determination step of reading a cursor position currently located, and a cursor font for a position read above. The current position display step of the cursor to highlight the border of the PIP screen.

As shown in FIG. 4, the sub-screen / main screen switching device of the present invention for performing the method consisting of each step includes a plurality of high-frequency signals received by the antenna ANT, as shown in FIG. 4. A main screen tuner 101 for tuning one broadcast signal for display on a main screen, a sub-screen tuner 102 for tuning a broadcast signal for display on a sub-screen from the plurality of broadcast signals, and the main screen tuner 102; Separating and demodulating the video signal from the broadcast signal output from the screen tuner 101 to process the PIP signal for display on the Citi 109 or to display the sub-screen to display the sub-screen with the main screen. A sub-screen image processing unit 103 for separating and demodulating and outputting a video signal from a broadcast signal output from the main screen image processing unit 108, the sub-screen tuner 102, and the sub-screen A picture processing unit (PIP) performs a signal transmitted from the surface image processing unit 103 and outputs the picture color signal (PIP RGB) to the main image processing unit 108. 104, a remote control receiver 106 that receives an infrared signal corresponding to the key signal and outputs a pulse signal when the user presses a desired key using the remote controller 107, and transmitted from the remote controller receiver 106; According to the order I ² C Controls the sub-screen image processing unit 103 and the IP processing unit 104 through the bus to process the PI signal, and emphasizes the edge of the screen where the cursor is located among the plurality of sub-screens by using the on-screen processing unit inside. The microcomputer 105 outputs an on-screen color signal (OSD RGB) to the main image processing unit 108.

Referring to the operation and effect of the present invention configured as described in detail as follows.

When the viewer presses a key corresponding to a desired channel through the remote controller 107 in order to watch the TV, infrared rays corresponding to the key are generated and transmitted to the remote controller receiver 106.

The remote control receiver 106 then receives the infrared rays and outputs the pulses corresponding to the infrared rays to the microcomputer 105.

Accordingly, the central processing unit 111 of the microcomputer 105 recognizes a channel desired by the viewer by the input pulse, and outputs high frequency channel data to the main picture tuner 101 to select the recognized channel. .

Accordingly, the main picture tuner 101 tunes one broadcast signal for a corresponding channel among a plurality of broadcast signals received through the antenna ANT and outputs the same to the main picture image processor 108.

Accordingly, the main image processing unit 108 separates the image signal from the input broadcast signal, demodulates it, and sends the demodulated signal to the Citi 109 to display the image.

In this way, when the viewer thinks of a broadcast he wants to watch, the viewer starts searching for a channel using the PIP function.

In other words, the viewer presses the IP on key provided in the remote controller 107.

Then, the remote control 107 emits infrared rays corresponding to the Pi on key, and receives the infrared rays from the remote control receiver 106 to make an appropriate pulse waveform and output them to the microcomputer 105.

The central processing unit 111 of the microcomputer 105 controls the on-screen display unit 113 so that nine sub-screens as shown in FIG.

Then, the on-screen display unit 113 transmits an on-screen display color signal (OSD R.G.B) for displaying nine sub-screens to the image processing unit 108 for the main screen via the input / output interface 110.

At the same time the central processing unit 111 I ² C Multiple PIP commands are issued to the PIP signal processing unit 103 and the PIP unit 104 through the bus to process the PIP signals.

And the central processing unit 111 will give a signal from the AV signal or CCTV from the signal received through the remote control 107 and the remote control receiver 106 or whether to give a signal from the sub-screen tuner 102. Choose.

For example, when selecting to give a signal from the sub-screen tuner 102, the central processing unit 111 transmits high frequency channel data to the sub-screen tuner 102.

Then, the sub-screen tuner 102 tunes one broadcast signal among a plurality of broadcast signals received through the antenna ANT and transmits the same to the sub-screen image processing unit 103.

Accordingly, the sub-screen image processing unit 103 separates the video signal from the broadcast signal from the sub-screen tuner 102, demodulates it, and outputs it to the IP processing unit 104.

Then, the IP processing unit 104 processes the sub-picture to be processed and transmits the processed PI color signal (PIP RGB) to the main screen image processing unit 108.

Then, the main image processing unit 108 processes the PI color signal transmitted from the IP processing unit 104 together with the signal transmitted from the main screen tuner 101.

The main screen and the sub screen are simultaneously displayed on the Citi 109.

At this time, the central processing unit 111 of the microcomputer 105 reads the cursor font previously stored in the RAM 112 to emphasize the edge of the screen where the cursor is located in the sub-screen as shown in FIG. To provide.

Accordingly, the on-screen display unit 113 transmits the on-screen color signal (OSD RGB) corresponding to the edge portion using the cursor font to the main screen image processing unit 108 via the input / output interface unit 110.

For example, if the current cursor position is in the ⓔ position as shown in (a) of FIG. 5, the program that has been continuously watched is displayed on the main screen 100, and the searched screen is displayed on the ⓔ screen of the sub-screen 200.

After that, the screen for the next channel is displayed on the ⓕ screen.

In this way, the channels increase from ⓐ screen to ⓘ screen of the sub picture.

When the sub-screen is displayed in this way, when the user wants to see the screen displayed on the ⓓ screen as the main screen as shown in (b) of FIG. 5, the viewer places the cursor position on the ⓓ screen and selects the housewife channel switch key. do.

Then, the central processing unit 111 of the microcomputer 105 reads the main screen data and the sub-screen data inputted to the main screen image processing unit 108 and replaces the data of the main screen with the sub-screen data. Is converted into main screen data and outputted to the main screen image processing unit 108.

Therefore, when the viewer places the cursor on the corresponding channel among the channels displayed on the sub screen and presses the housewife channel switch key, the viewer can watch the program for the channel displayed on the sub screen through the main screen.

The operation described so far will be described once again based on the entire operation of FIG. 6.

The microcomputer 105 checks whether the PI channel is currently being searched for (S1).

As a result of the check, it is checked whether the input key is a housewife switching signal for main and sub switching if the PIP channel is searched (S2), and if the PIP search command is entered if the PIP channel search is not performed (S3).

In step S3, when the PIP search command does not come in, the microcomputer 105 sends the high frequency data to the sub-screen tuner 102, and instructs the PIP processing unit 104 to process the multi-IP. (S5)

Then, the microcomputer 105 checks the current cursor position and, if there is a movement by the viewer, moves the viewer in a desired direction, and determines the moved cursor position (S6).

If the cursor position is determined in step S6, the on-screen font data designed in advance to read the current cursor position from the RAM 112 is read.

When the read data is output to the on-screen display unit 113, the on-screen display unit 113 processes the data and outputs the data through the input / output interface unit 110.

Accordingly, the edge of the portion where the cursor is located in the sub-screen is emphasized as shown in FIG. 5 (S7).

In operation S1, if the PIP channel is currently being searched, it is checked whether a housewife switching key for housewife switching is input (S2).

When the housewife switching key is input in the above, the microcomputer 105 displays information on the screen showing the current main screen, for example, RAM data from the RAM 112 storing RF, AV, CCTV modes, frequency data of high frequency, The high frequency program number data, the high frequency channel number data, the high frequency program data, etc. are switched to sub-screen data, and the data displayed on the sub-screen by the PIP function is switched to the main screen data. (S4)

After the data of the main screen and the sub-screen are switched to each other, the process proceeds to step S5 to generate a multipipi command, displays the movement process and the cursor position for the cursor position, and ends.

In this case, the current channel search must be performed at a constant time interval.

Then, when the microcomputer 105 issues a multi-PI processing command to the IP processing unit 104, a process of processing the command will be described in detail with reference to FIG. 7 as follows.

When the multi-PI processing command is input from the microcomputer 105, a signal RF.AV.CCTV to be shown to the multi-PI is read from the RAM 112. (S11)

The current screen operation is stopped in order to display the signal read from the RAM 112 on the multi-PI, that is, the sub-screen (S12).

The screen thus stopped is memorized in the corresponding position among the multi-pipies (S13).

Then, in order to display the IP screen at the next IP memory location, the current IP memory location is checked (S14). If the current position is data between 0 and 8, The IP position is increased by +1 (S15), and if the current position is not data between 0 and 8, 0 data is stored in a memory for storing the position (S16).

The radio frequency data corresponding to the current PPI position obtained in steps S15 and S16 are stored in the RAM 112 (S17).

At this time, if it is input from outside like AV or CCTV, there is no need to process.

The microcomputer 105 then transmits the high frequency data obtained in step S17 to the sub-screen tuner 102 to tune the corresponding channel.

When the tuned signal is input through the sub-screen image processing unit 103, the inputted data is output to the IP screen (S18) and terminates when the PIP stop operation release command is input from the microcomputer 105. (S19)

Next, referring to FIG. 6, the cursor position shift processing in FIG. 6 is checked. If there is a key input from the remote controller 107, it is checked whether the key is a key for cursor movement.

As a result of the check, the cursor movement key determines which direction command is up, down, left, or right, and moves the cursor to the upper direction in the upper direction, to the lower direction in the lower direction, to the left in the left direction, and to the right in the right direction. (S22)

Here, the data is processed so that the current PPI cursor does not go out of the range of 0 to 8. That is, it has data of 4 and if there is an input of the up direction key, it is calculated as 1, and if there is an input of the down direction key, it is calculated as 7.

It is determined whether the position of the moved cursor is between 0 and 8 (S23), and if it is in between, it is terminated. If it is not between 0 and 8, the initial value is stored in RAM 112 and is terminated. (S24)

That is, the initial value 4 is stored.

When the cursor position is confirmed by the same operation as described above, an operation for emphasizing the cursor position is performed, which will be described with reference to FIG. 9.

The current cursor position is read from the RAM 112 (S31).

Then, in order to highlight the screen for the current cursor position, the pre-designed cursor font for the current cursor position is read from the on-screen RAM (S32).

When the cursor font thus read is output to the on-screen display unit 113, the on-screen display unit 113 displays the cursor on-screen display (0SD) as shown in FIG.

By the above operation, the user can easily switch the main channel and the sub-screen by selecting the desired channel by operating the cursor easily in addition to the channel being searched by using the appearance of the circus on the border of the PPI screen.

Therefore, the present invention stores channel information such as channel number and frequency for the currently searched channel when searching for multiple IPs, and also stores the OSD position according to the current IP location and recognizes the corresponding cursor information when the cursor moves after the search. If the switch key is input, the channel-related stored data is exchanged so that the channel can be changed for the cursor position, thereby enhancing user convenience.

Claims (5)

A selection signal checking step of determining whether a user selection signal is a main / minor switching or a PI search according to whether a current PI channel is searched, and if a desired channel is found in the selection signal checking step, data and PI currently displayed on the main screen; A housewife data switching step of switching data displaying each other; and a multi-IP processing step of performing a multi-IP processing by the housewife data switching and IP search command; and moving and moving a cursor position by a user. Cursor position movement processing step of checking the position and the cursor position display step of displaying the cursor position to be displayed clearly by displaying the border position using the on-screen display for the moved cursor position How to switch screen / main screen. The PIP search step comprises: a search signal determining step of determining an input PIP search signal; and if the search signal is a search signal, determining whether to input a housewife switching key; The sub-screen / main screen switching method of the TV, characterized in that the input command determination step of determining. The method of claim 1, wherein the multi-PI processing step comprises: a current channel processing step of reading data to be displayed on the multi-PI from a tuner and displaying the data at a corresponding position; PIP position moving step of storing the channel data for the position, and the next channel processing step of reading and storing the above-mentioned channel data from the tuner to display in the corresponding position and terminates How to switch screen. The method of claim 1, wherein the cursor position movement processing step includes: a cursor position movement key checking step of checking whether an input key value is a command for cursor movement, and a command of moving the cursor position from the cursor position up, down, left, right And a moving position checking step of determining whether the image is determined, and a cursor position storing step of storing the determined cursor position. The method of claim 1, wherein the displaying of the cursor position comprises: a current position data determination step of reading a current cursor position; and a cursor font for the read position, so as to emphasize the border of the PPI screen. Sub-screen / main screen switching method of the TV, characterized in that consisting of the current position display step.