KR20000028048A - Device for adjusting tv screen and method the same - Google Patents

Abstract

PURPOSE: A device for adjusting a TV screen is provided, so that a user can adjust the TV screen with functions of contrast, brightness, colors, tints after seeing a stopped screen, by displaying an image signal of one frame detected among currently replayed broadcasting image signals, as the stopped screen on a PIP(Picture In Picture) screen. CONSTITUTION: A TV screen adjusting device having a PIP(Picture In Picture) function and having a CRT(Cathode Ray Tube), a screen adjusting mode key, and many screen adjusting keys comprises a frame detector(16), a storage unit(17), and a controller(14). The frame detector detects one frame presently replayed according to one control signal, when the screen adjusting mode key is inputted while a broadcasting image signal or an AV image signal is replayed through the CRT. The storage unit stores a screen adjusting data value according to the one control signal. The controller displays the detected frame on a PIP screen of the CRT as a stopped screen, when the one frame is detected. The controller adjusts a picture of the stopped screen displayed on the PIP screen according to inputted adjusting signals, when various screen adjusting signals are inputted by using the screen adjusting keys after seeing the displayed stopped screen. The controller stores the adjusted screen adjusting data value in the storage unit, when a screen adjustment of the stopped screen is completed, and adjusts the image screen replayed as a main picture as the screen adjusting data value stored in the storage unit.

Description

TV screen control device and method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting a television (hereinafter referred to as a TV) and a method thereof. In particular, a video signal of one frame detected by detecting one frame among broadcast video signals currently being reproduced is recorded on a PIP screen. The present invention relates to an apparatus for adjusting a TV screen and a method of controlling a screen with a desired contrast, bright, color, tint, etc., by viewing a still image of the PIP screen displayed by the display. .

With the development of communication technology these days, there are various TV broadcasts. When you see these kinds of TV broadcasts, satellite TV broadcasts that transmit and receive TV broadcasts through satellites, and broadcast programs transmitted by each cable station through cables are transmitted and received. Can be classified into cable broadcasting and TV broadcasting of the airwave transmission method which is most widely used. However, even if the TV broadcasting method is different from each other, the TV receiver can be used in common. In addition, due to the development of electronic technology, the TV receiver can be easily adjusted by the consumer, that is, the TV receiver with various functions added to the taste of the consumer is widely used.

A plurality of broadcast programs desired by a viewer through each area at the same time by dividing a broadcast program broadcasted through a unique channel of each broadcast station from a plurality of broadcasters among such various TV receivers into an area of a main screen and a sub-screen. BACKGROUND ART A large number of TV receivers having a picture in picture (PIP) function, which reproduces a video according to a viewer's choice so that a viewer can simultaneously watch a plurality of broadcast programs, are widely used.

The block configuration and operation of a general TV receiver having such a PIP function will be described with reference to FIG. 1.

1 is a block diagram of a TV receiver according to the prior art having a PIP function. The TV receiver manufactured according to the prior art is configured as shown in FIG. 1. In the configuration, the TV receiver receives a signal for a TV broadcast program transmitted from each TV station at the antenna 1, and the user's channel. A first intermediate frequency circuit portion 3 for a main screen demodulating and processing a video signal and an audio signal for a broadcast program tuned through the main channel tuner 2 to a channel selected according to a selection; The audio signal output from the main screen audio signal processing section 4 and the main screen audio signal processing section 4 for detecting and reproducing only the audio signal from the video signal and the audio signal demodulated in 3) are amplified by a predetermined level. The audio signal amplifier 5 is then output to the speaker SP.

In addition, the first video signal processor 6 for main screen and the first video signal processor 6 for signal processing to detect and display the video signal demodulated and output by the first inter-frequency circuit circuit 3, 6 A first video signal output section 7 for main screen which outputs RGB data corresponding to the main screen processed at "

At the same time, when the PIP function of the user is selected, that is, when the sub picture mode is switched, only the video signal of the sub channel broadcast tuned by the sub channel tuner 8 picked up from the antenna 1 is detected and demodulated. A second video signal processor for sub-screen which detects and processes only the video signals of the sub-channel broadcasts output from the second intermediate frequency circuit section 9 for the sub-screen and the second intermediate frequency circuit section 9 for the sub-screen ( 10), a second video signal output unit 11 for sub-screen outputting RGB data corresponding to the sub-screen from the second video signal processor 10 for the sub-screen, and a first video signal output unit for the main screen ( 7) and a first RGB switching IC 12 synthesized and processed by the sub picture blanking data provided from the main picture RGB data and the sub picture RGB data respectively outputted from the second video signal output unit 11 for sub picture, RGB data including the sub-screen output from the first RGB switching IC 12 A second RGB switching IC 13 for synthesizing provided on-screen RGB data by on-screen blanking data and outputting sub-screen and on-screen embedded RGB data to a TV receiver (CRT); The main channel tuner 2 and the subchannel are discriminated by determining a key input unit 15 that provides a function desired by the user and a selection signal for selecting a main channel or subchannel, and a channel selection signal provided by the key input unit 15. The control unit 14 provides a tuning control signal to the tuner unit 8 and provides sub-screen blanking data and on-screen data to the first and second RGB switching ICs 12 and 13. Here, the sub-screen using the first RGB switching IC 12 and the second RGB switching IC 13 to implement the operation of the On Screen Display (OSD) with the sub-screen included in the main screen Blanking data for and blanking data for on-screen should be used.

Let us look at the operation of each configuration of the TV receiver according to the prior art having the configuration as described above.

First, when a viewer selects a main channel using a numeric key or a channel up / down key of the key input unit 15 and applies it to the controller 14, the controller 14 The applied main channel selection signal is provided to the main channel tuner 2 so that the viewer tunes to the desired channel. Accordingly, the main channel tuner 2 tunes to the channel corresponding to the channel selection signal provided from the controller 14 and transmits the broadcast video and audio signal corresponding to the tuned channel to the first intermediate frequency circuit part 3 for the main screen. Will print.

The first intermediate frequency circuit unit 3 for the main screen demodulates the broadcast image and the audio signal for the channel selected by the viewer, which is tuned and output from the main channel tuner, and separates the audio signal from the video signal. (4), and the video signal is output to the first video signal processor 6 for the main screen. Here, the description of the operation of the processing of the audio signal will be omitted.

The first video signal processor 6 for the main screen processes the signal for displaying the video signal for the main screen output from the first intermediate frequency circuit part 3 for the main screen to the first video output unit 7 for the main screen. By outputting, the first video output unit 7 for the main screen generates RGB data corresponding to the video signal for the main screen, and outputs the TV receiver through the first RGB switching IC 12 and the second RGB switching IC 13. CRT) outputs the image to a screen which the viewer can watch.

In this way, if the viewer wants to check the broadcast program of the channel selected by the viewer on the main screen according to the PIP function, press the PIP function key attached to the remote control and press the channel key to check. When selected, the control unit 14 determines this signal and provides a channel selection signal to the subchannel tuner 8. Accordingly, the subchannel tuner 8 detects only the video signal of the corresponding channel tuned by tuning to the channel of the PIP function channel selected by the viewer in the second intermediate frequency circuit section 9 for subpicture and demodulates the demodulated subchannel. The screen image signal is output to the second image signal processor 10 for the sub-screen.

The sub picture second video signal processor 10 processes the sub picture video signal output from the sub picture second intermediate frequency circuit part 9 to display the sub picture video signal 11 to display the sub picture second video output unit 11. Output Therefore, the second image output unit 11 for the sub-screen generates RGB data corresponding to the sub-screen image signal and provides the RGB data to the first RGB switching IC 12.

The first RGB switching IC 12 outputs RGB data corresponding to the video signal of the main screen output from the first video signal output unit 7 for the main screen and the second video signal output unit 11 for the sub-screen. The RGB data corresponding to the sub screen to be synthesized is synthesized by the sub screen blanking data provided from the controller 14 and output to the second RGB switching IC 13.

The second RGB switching IC 13 provides the synthesized RGB data including the sub-screen output from the first RGB switching IC 12 and the on-screen RGB data provided from the control unit 14. The sub-screen is displayed in a predetermined region of the TV receiver by combining the sub-screen and the RGB data included in the on-screen by combining the on-screen blanking data. In this case, the audio signal corresponding to the video of the sub-screen displayed in the predetermined region of the TV receiver CRT is not output through the speaker SP, but only the audio signal corresponding to the main screen is output. Accordingly, the viewer can check a plurality of broadcast programs played through different channels through one TV receiver (CRT).

Let's take a quick look at how to adjust the screen in a TV system with this PIP function. Here, the screen adjustment refers to adjustment of contrast, bright, color, tint, sharpness, equalize, bass, treble, and the like.

Before the regular broadcast start time of the TV has a screen adjustment time so that the user can adjust the color, brightness, sharpness, and distortion of the screen as desired. In other words, each TV station transmits a screen adjustment pattern to display on the TV screen before the regular broadcasting of the TV starts. Here, the screen adjustment pattern is displayed in the form of a color bar of three primary colors.

When the screen adjustment pattern is displayed, the user can view the displayed screen pattern and adjust the screen state to desired color, brightness, sharpness, etc. by using a plurality of screen adjustment keys attached to the main body of the TV or the remote control, and the screen is distorted. Even if a phenomenon occurs, it can be adjusted so that no distortion occurs.

The screen adjustment pattern is automatically deleted when the regular broadcast starts, and the regular broadcast signal transmitted from each broadcasting station is displayed. While the regular broadcast is displayed, the user may adjust the sharpness and color of the screen using various screen adjustment keys of the key input unit 15.

However, since the moving picture is being displayed during regular TV broadcast, it is difficult to check the screen change by the adjustment of the screen state when the screen state is adjusted using the screen control keys of the TV main unit and the remote control. Therefore, there is a problem that the user can not accurately adjust to the desired screen state.

That is, in order to adjust to the desired screen state, the user should always look at the screen adjustment pattern displayed before the start of the regular broadcast, that is, the adjustment can be made to the exact screen state desired by the user only after adjusting within the screen adjustment time. You can check whether it is adjusted to the state. However, if the screen is adjusted during the screen adjustment time using such a screen adjustment pattern, the screen adjustment pattern is always given for a certain time before the TV is regularly broadcasted. This will be caused.

Accordingly, an object of the present invention is to solve the above-mentioned problems according to the prior art, and an object of the present invention is to display a PIP screen in which a frame is detected and displayed as a still picture on a PIP screen. The present invention provides a method of adjusting a screen of a TV, which allows a user to adjust a screen with desired contrast, bright, color, tint, and the like.

1 is a block diagram of a TV system having a PIP function according to the prior art.

2 is a block diagram showing the screen adjustment device of the TV according to the present invention.

3 is a flowchart illustrating an operation of a method for adjusting a screen of a TV according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

1: Antenna 2,8: Main / Sub Channel Tuner

3, 9: first and second intermediate frequency circuit section 6, 10: first and second video signal processing section

7, 11: first and second video signal output unit 12, 13: first, 2RGB switching IC

14: control unit 15: receiving unit

16: frame detection unit 17: storage unit

According to an aspect of the present invention, there is provided a screen adjusting apparatus for a TV having a CIP, a screen adjusting mode key, and a plurality of screen adjusting keys and having a PIP function. A frame detection unit detecting a frame of a video signal currently being reproduced according to a control signal when a screen adjustment mode key is input while a broadcast video signal or an AV video signal is reproduced through the CRT; A storage unit for storing screen adjustment data values according to one control signal; a) when one frame is detected by the frame detection unit, the detected frame is displayed as a still picture on the PIP screen of the CRT, and b) when the various still picture adjustment signals are input using the screen adjustment key after viewing the displayed still picture. And adjust the still picture displayed on the PIP screen according to the input adjustment signal, and c) when the adjustment of the still picture is completed, the adjusted picture adjustment data value is stored in the storage and at the same time. And a control unit for adjusting the video screen being reproduced as the main screen with the stored screen adjustment data values.

In addition, the screen adjustment method of the TV according to the present invention includes a memory, a monitor, and a screen adjustment method of a TV having a PIP function, comprising: displaying a broadcast video signal input through a channel selected by a user to the monitor; When the screen adjustment mode selection signal is input while the broadcast video signal or the AV video signal is displayed on the monitor, configuring the monitor into a main picture and a sub picture (PIP), and detecting one frame of the video signal currently being reproduced; ; Displaying the detected video signal of one frame on the configured PIP screen; Viewing a video signal of one frame displayed on the PIP screen, adjusting the screen to a desired screen state, and storing the adjusted screen adjustment data value in the memory; After the adjusted screen adjustment data value is stored in the memory and the screen conversion signal is input, the screen adjustment data value stored in the memory is read to display the screen of the current video signal being reproduced as the main screen with the read screen adjustment data value. In the process of adjusting.

Hereinafter, an apparatus and method for adjusting a TV screen according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating an apparatus for adjusting a screen of a TV according to the present invention. Referring to the configuration of the present invention, the description of the same elements as those of the prior art shown in FIG. 1 will be omitted. When the screen adjustment mode key of the key input unit 15 is input while the signal or the AV video signal is being reproduced, the frame detector 16 detects a frame of the video signal currently being reproduced according to the control signal of the controller 14, and the frame. When one frame is detected by the detector 16, the detected frame is displayed as a still image on the PIP screen of the CRT, and the displayed still image is adjusted to a screen desired by the user using various screen adjustment keys of the key input unit 15. If the screen adjustment data value is adjusted, adjust the screen so that the broadcast video screen or AV video screen of the main screen corresponds to the adjusted screen adjustment data value. The controller 14 and the storage unit 17 for storing the adjusted screen adjustment data value is further configured.

Let us look at the operation of the screen adjustment apparatus of the TV according to the present invention with such a configuration. Here, since the main picture and the PIP playback operation of the broadcast video signal are the same as in the prior art, the operation thereof will also be omitted.

First, when the screen adjustment mode of the key input unit 15 is selected to adjust the screen of the TV while the broadcast video signal of the channel selected by the user is displayed through the CRT, the control unit 14 sends the frame detection unit 16 to the frame detection unit 16. A detection control signal is provided to cause the frame detection unit 16 to detect one frame of the video signal currently being reproduced.

Accordingly, the frame detector 16 detects one frame of the video signal currently being reproduced under the control of the controller 14 and displays the CRT PIP screen through the first, second, R, G, and B switching units 12 and 13. Will be displayed. Herein, when the screen adjustment mode key of the key input unit 15 is input, the controller 14 controls the first, second, R, G, and B switching units 12 and 13 to separate the CRT screen into a main screen and a sub screen. Let's go. Therefore, the video screen of the detected one frame is displayed on the sub-screen. At this time, the image displayed on the sub screen, that is, the PIP screen is a still picture.

In this way, when a still image of one frame detected on the PIP screen is displayed, the user views the still image displayed on the PIP screen, and the various screen adjustment keys of the key input unit 15, that is, the contrast adjustment key and the bright ( Bright), color adjustment key, tint adjustment key, sharpness adjustment key, equalize adjustment key, bass adjustment key, treble adjustment key, etc. Will be adjusted.

At this time, when adjusting the screen by such keys, the screen of the broadcast video signal or the AV video signal reproduced on the main screen is not adjusted, but only the still picture displayed on the sub-screen is adjusted.

When the screen is adjusted using the various adjustment keys, the adjusted various data values are sequentially stored in the storage unit 17 as the screen adjustment setting values.

After the adjustment of the still image displayed on the PIP screen is completed, when the setting key of the key input unit 15 is input, the control of the first, second R, G, and B switching units 12 and 13 of the control unit 14 is controlled. The PIP screen disappears, and the screen adjustment data values stored in the storage unit 17 are sequentially read to adjust the screen of the broadcast video signal or the AV video signal being reproduced as the main screen with the read adjustment data values. will be.

For example, when the user adjusts the contrast using the contrast adjustment key of the key input unit 15 while the still picture of one frame detected by the frame detector 16 is displayed on the PIP screen, the main screen is reproduced. The contrast of the current broadcast video signal screen is not converted, and only the contrast of the still picture displayed on the PIP screen is adjusted.

When the contrast is adjusted to the value desired by the user, the adjusted contrast data value is stored in the storage unit 17.

Subsequently, when the brightness of the screen is adjusted using the brightness adjustment key, the brightness value of the screen of the video signal (video) of the main screen is not adjusted but the brightness value of the still picture on which the PIP screen is displayed as the above contrast adjustment. This adjusted and adjusted data value is stored in the storage unit 17.

In this way, the color, tint and sharp press are also adjusted. Here, the still picture displayed on the PIP screen on which the screen is adjusted is the same image.

A screen adjustment method of the TV according to the present invention corresponding to such an operation will be described step by step with reference to FIG. 3.

3 is a flowchart illustrating an operation flowchart of a TV screen adjusting method according to the present invention.

First, a broadcast video signal or an AV video signal is displayed on a monitor of a TV through a channel selected by the user (S101).

Subsequently, when the user inputs a video adjustment mode signal to adjust the screen of the TV during video signal reproduction, that is, it is determined whether the screen adjustment mode key signal of the key input unit 15 is input (S102). If the signal is input, one frame of the video signal currently being reproduced is detected (S103).

Subsequently, one detected video frame screen (still image) is displayed on the PIP screen (S104).

Subsequently, upon viewing the still image displayed on the PIP screen, the user adjusts to a desired screen using various screen adjustment keys, and sequentially stores the adjusted various screen data values in the memory 17 (S105).

When the screen adjustment is completed as described above, it is determined whether the selection key is input (S106). If the selection key is input, the broadcast video or AV video screen being played back to the main screen is adjusted using the screen adjustment data value stored in the memory 17. It will be (S107).

As a result, the screen adjustment method of the TV according to the present invention detects a video frame of one frame among the currently reproduced video screens, displays the detected one-frame video screen (still image) on the PIP screen, and then displays the PIP screen. The user can view still images and adjust them to the screen state that suits the user's taste or the atmosphere of the program. That is, the still image displayed on the PIP screen serves as the screen adjustment pattern of the prior art.

As described above, the apparatus for adjusting a screen of a TV and a method thereof according to the present invention detect a one-frame video screen (still picture) by detecting a video screen of one frame among the video screens currently being reproduced and a PIP screen. Display on the PIP screen, view the still image displayed on the PIP screen, adjust the screen state, save the screen adjustment data value in the memory, and adjust the video screen being played back as the main screen by the screen adjustment data value stored in the memory. There is an advantage that the user can create a screen display that suits the user's desired screen state, that is, the user's taste or the atmosphere of the program.

Claims (4)

In the screen adjusting apparatus of a TV having a CRT, a screen adjusting mode key and a plurality of screen adjusting keys and having a PIP function, A frame detector for detecting one frame of a video signal currently being reproduced according to a control signal when a screen adjustment mode key is input while a broadcast video signal or an AV video signal is reproduced through the CRT; A storage unit for storing screen adjustment data values according to one control signal; a) when one frame is detected by the frame detector, the detected frame is displayed as a still picture on the PIP screen of the CRT; b) When the still image displayed is displayed and various screen adjustment signals are input using the screen adjustment keys, the still image displayed on the PIP screen is adjusted according to the input adjustment signal. c) a control unit for storing the adjusted screen adjustment data value in the storage unit and adjusting the video screen being reproduced as the main screen with the screen adjustment data value stored in the storage unit when the screen adjustment of the still image is completed. Screen control device, characterized in that configured by. In the screen adjustment method of a TV having a memory, a monitor and a PIP function, Displaying a broadcast video signal input through a channel selected by a user to the monitor; When the screen adjustment mode selection signal is input while the broadcast video signal or the AV video signal is displayed on the monitor, configuring the monitor into a main picture and a sub picture (PIP), and detecting one frame of the video signal currently being reproduced; ; Displaying the detected video signal of one frame on the configured PIP screen; Viewing a video signal of one frame displayed on the PIP screen, adjusting the screen to a desired screen state, and storing the promoted screen adjustment data value in the memory; After the adjusted screen adjustment data value is stored in the memory and the screen conversion signal is input, the screen adjustment data value stored in the memory is read to adjust the screen of the current video signal being reproduced as the main screen with the read screen adjustment data value. How to adjust the screen of the TV, characterized in that consisting of steps. The image adjustment method of claim 2, wherein the screen adjustment is performed in contrast, bright, color, tint, sharpness, equalize, bass, and treble. Adjusting the screen). The method according to claim 2, wherein the video screen displayed on the PIP screen is a still picture.