KR20070092910A - Method for preventing burn-in phenomenon of display device - Google Patents

Abstract

A method for preventing a burn-in phenomenon of a display device is provided to suppress the burn-in phenomenon by providing an image mode in response to a pulse-command key signal inputted from a remote controller. A pulse-command key signal is received from a remote controller(S300). It is determined whether the received pulse-command key signal is real(S302). If the received pulse-command key signal is real, a still image is provided(S304), and if the received pulse-command key signal is not real, a screen saver image is provided(S306). A reproduction-command key signal is received from the remote controller. A normal image is reproduced according to the determined result on whether the stop-command key signal is real.

Description

How to prevent burn-in for display devices {METHOD FOR PREVENTING BURN-IN PHENOMENON OF DISPLAY DEVICE}

1 is a flowchart illustrating a burn-in phenomenon prevention method of a display apparatus according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a burn-in phenomenon preventing method of a display device according to an exemplary embodiment of the present invention, which illustrates a method of returning to a normal image playback step from preventing burn-in phenomenon.

3 is a block diagram schematically illustrating a configuration of a PVR system according to an exemplary embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: IR receiver 200: IDE interface

110: control unit 120: screen control unit

130: memory 140: tuner

150: demodulation unit 160: demultiplexer

170: decoder 180: output unit

190: OSD unit 210: HDD

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a method for preventing a burn-in phenomenon occurring when a pause function is used for a long time.

In the analog broadcasting era, the VCR (Video Cassette Recorder) system, which records analog video on magnetic tape, became the mainstream of video data storage.However, with the spread of digital TV, it is hard to record, play, and edit digital broadcasts. Personal video recorder (PVR) systems, which are disk storage-based personal video recorders, are becoming popular.

The PVR system is a next-generation recording device that has a built-in hard disk drive (HDD) in a set-top box or a digital TV main body and can record a predetermined amount of broadcast programs depending on the capacity of the HDD. Because PVR system uses hard disk, it is easy to find or edit the desired part.All PVR systems can be used for scheduled recording through EPG (Electronic Program Guide), which is a broadcast schedule, and can record multiple programs simultaneously. You can watch a live broadcast and stop it for a moment or repeat it from a few seconds to minutes ago.

In addition, slow playback is possible, and high speed playback and skip functions also allow viewing only desired portions. Video recording is basic and offers a number of additional features for users, in addition to thumbnail and time shift functions.

Recently, display devices suitable for digital TVs (ex: LCD and PDP) have been pursuing a larger size and a slimmer thickness, and thus, new artifacts that can degrade image quality have been generated.

One such artifact is sticking or ghosting due to burn-in or marking effects.

This phenomenon is generated from the change of panel operation with the display time of a specific image. That is, if an image is displayed as a fixed image for a long time on the screen, the image is shown as a shadow in other scenes and is called sticking.

In addition, a display device such as a projection TV is a fixed image, causing damage to the phosphor when used for a long time, causing sticking to the display.

The pause function in the PVR system is one of the important convenience functions, but if the screen pause function is used for a long time due to user's convenience, the above-described display devices may experience burn-in.

There has never been a way to prevent burn-in of display devices when using the pause function for a long time in existing PVR system. However, it is not possible to watch digital broadcasting on digital broadcasting set-top box or high-definition digital TV (HDTV) system. When there is no input of a remote control key, an example of operating a screen saver (screen saver) after a predetermined time determined by the user has been proposed in Korean Patent Laid-Open Publication No. 2003-0094483.

However, the technology proposed in the above-mentioned Korean Patent Publication No. 2003-0094483 has a problem in that it is hardly applicable in the current two-way data broadcasting where the user and the system continue to communicate by limiting the screen saver to data transmission only.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to prevent burn-in of a display device generated when a pause function is used for a long time according to user's convenience when playing a broadcast program stored in a hard disk. To provide a way.

Burn-in phenomenon preventing method of the display device according to the present invention for achieving the above object, in the display device having a remote control,

(a) receiving a stop command key signal corresponding to a key type from a remote controller;

(b) providing an image according to the stop command key signal received in step (a);

(c) receiving a play command key signal from a remote controller;

(d) determining the stop command key signal of the image provided in step (b) to play a normal image.

In this case, step (b) preferably includes determining whether the stop command key signal received in step (a) is a real stop command key signal and providing an image according to the determined stop command key signal.

In addition, if it is determined in step (b) that the signal is a real pause command key signal, it is preferable to provide a still image. If it is determined in step (b) that the signal is not a real stop command key signal, it is preferable to provide a screen saver image. Do.

Finally, in step (d), when the play command key signal is received in step (c), it is determined whether the stop command key signal determined in step (b) is a real stop command key signal or a pause command key signal. It is desirable to regenerate.

The present invention is characterized in that the burn-in phenomenon of the display device is prevented by providing an image mode according to a command signal of an input key.

Other objects, features and advantages of the present invention will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown in the drawings and described by it will be described by at least one embodiment, By the technical spirit of the present invention described above and its core configuration and operation is not limited.

1 is a flowchart illustrating a burn-in phenomenon prevention method of a display device according to an exemplary embodiment of the present invention, and illustrates a method of providing a still image or a screen saver image to prevent burn-in phenomenon.

As shown in FIG. 1, initially, when a stop command key signal is received from a user through a remote controller through a remote controller (S300), it is determined whether the received stop command key signal is a real pause command key signal. (S302). Next, if it is determined in step S302 that the stop command key signal is a real stop command key signal, the process proceeds to a step of providing a still image in which the image is stopped during playback (S304). If it is determined that the signal is not a real stop command key signal, the process proceeds to providing a screen saver image (S306).

2 is a flowchart illustrating a burn-in phenomenon preventing method of a display device according to an exemplary embodiment of the present invention, which illustrates a method of returning to a normal image playback step from preventing burn-in phenomenon.

As shown in FIG. 2, when a play command key signal is received from the user through the remote control to the display device (S400), a stop command key being executed to determine whether the currently executed image is a still image or a screen saver image. It is determined whether the signal is a real stop command key signal (S402). If it is determined in step S402 that it is a real stop command key signal, the process proceeds to playing a normal video (S404). If it is determined that the signal is not a real stop command key signal, the stop command key signal being executed is temporarily stopped. The operation proceeds to the step of determining whether the command key signal (S406). If it is determined in step S406 that the signal is a pause command key, the process proceeds to the step of stopping the screen saver image (S408) and reproduces the normal image (S408). At this time, if it is determined that the pause command key signal is not, the process proceeds to the step of playing back the normal image (S412).

In more detail, the current digital broadcast is stored in real time on the hard drive built in the display device or the set-top box or the broadcast data already stored in the PVR system. In this case, the user may stop the screen of the display device by using a pause key or a real pause key provided in the remote controller according to the purpose.

For simplicity, in the conventional method, when the static state is hardly input by the user or the static state is maintained during the booting process, the screen saver image is automatically executed after a predetermined time so as to burn-in the display device. Could prevent. However, for the convenience of the user, for example, when analyzing still images or when the user is away, there is an inconvenience of resetting the screen saver execution time. In the current two-way data broadcast where the user and the system continue to communicate, There was a problem that it is hard to apply.

However, in the method according to the preferred embodiment of the present invention, the remote control command key may be simply implemented, and the above-described method may be simply executed by adding an algorithm without any additional components in hardware.

3 is a block diagram schematically illustrating a configuration of a PVR system according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the PVR system includes an IR receiver 100 for receiving remote control key code input information, a controller 110 for controlling the system, a screensaver controller 120 for controlling a screen saver image, and a memory ( 130, a tuner 140 for tuning a broadcast channel to be watched, a demodulator 150 for demodulating the tuned signal, and demultiplexing for separating the demodulated broadcast signal into image data, audio data, and information data. Unit 160, video / audio decoder 170, an output unit 180 for outputting an image, an OSD (On Screen Display) 190 for allowing a user to directly optimize the screen of the monitor, IDE (Integrated Drive) The interface unit 200 includes a hard disk drive (HDD) 210.

Looking at the operation briefly, the IR receiver 100 receives the remote control code input information and transmits it to the controller 110 and the screen saver controller 120. The controller 110 analyzes a remote control code transmitted from the IR receiver 100 and transmits remote control code analysis information to each corresponding device. For example, if the key code interpretation information of the remote control is a channel change request command, the controller 110 transmits the channel change request command to the tuner 140, and if the key code interpretation information of the remote control is a corresponding program recording command. The program is stored in the HDD 210. In addition, when a recording program list request command is received from the user, the controller 110 outputs the recorded program list stored in the HDD 210 through the output unit 180. If the key code signal of the remote controller input to the IR receiver 100 is a stop command key signal, the control unit 110 receives the stop command key signal and determines whether it is a real stop command key signal or a pause command key signal. In this case, if it is determined that the stop command key signal is a pause command key signal, the screen saver controller 120 reads screen saver data in a predetermined region of the HDD 210 to the OSD unit 190. After that, the output unit 180 outputs the screen saver image. If it is determined that the stop command key signal is a real stop command key signal, control to provide a still image is performed. Next, if a normal play request command signal is received after a pause, the screen saver controller 120 controls the OSD unit 190 to stop the screen saver screen, and the controller 110 determines that the stop command key signal is a real stop command. It determines whether it is a key signal or a pause command key signal, and controls to play the screen normally.

The memory 130 is composed of a flash ROM storing software such as a DRAM and an operating system (OS). The demodulator 150 demodulates the digital broadcast signal received by the tuner 140, and the demultiplexer 160 multiplexes the video data, audio data, and the like, which are multiplexed with the broadcast signal supplied from the tuner 140. Separate information such as data.

The decoder 170 decodes the compressed data of the video, audio data, and other broadcast data separated from the demultiplexer 160 and transmits the decoded data to the output unit 180.

When the OSD unit 190 processes OSD data such as recording list display, channel display, electronic program guide (EPG), menu display, and the like, the OSD is transmitted to the output unit and the real stop command key signal is received from the IR receiver 100. Provides a still image through the control of the control unit 110, and, if receiving the pause command key signal, the screen saver data stored in the HDD 210 through the control of the screen saver control unit 120 and the control unit 110 After processing in the OSD unit 190 and output through the output unit 180.

The IDE interface unit 200, also referred to as an IDE controller, transmits TS data, which is transport stream data transmitted from a system decoder (not shown), inside the decoder 170 to the HDD 210, and transmits IR data. When the recording and playback command is received from the receiver 100, the TS stored in the HDD 210 is transferred to the decoder 170 under the control of the controller 110.

The decoder 170 decodes TS data to an ES (Element Stream) step through a system decoder (not shown) inside the decoder, and then performs a video decoder (not shown) and an audio decoder (not shown) inside the decoder. The video ES and audio ES are decoded again and then transmitted to the output unit 180.

The HDD 210 receives a user's recording command and stores TS data transmitted from the IDE interface unit 200 and also stores screen saver data.

Above, preferred embodiments of the present invention described above are disclosed for the above purposes, and such changes and implementations fall within the scope of the present invention.

As described above, the burn-in phenomenon preventing method of the display apparatus according to the present invention provides an image mode according to a stop command key signal of a key input from a remote controller, thereby preventing burn-in of the display apparatus and extending the life of the display apparatus. It works.

In addition, since it can be simply implemented by the operation of the remote control command key, it can be easily executed simply by adding an algorithm without any additional components added in hardware.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (5)

In a display device having a remote control, (a) receiving a stop command key signal corresponding to a key type from the remote controller; (b) providing an image according to the stop command key signal received in step (a); (c) receiving a play command key signal from the remote controller; and (d) determining a stop command key signal of the image provided in the step (b) to play the normal image. The method of claim 1, Step (b) is Determining whether the stop command key signal received in step (a) is a real stop command key signal; And providing an image according to the determined stop command key signal. The method of claim 2, And determining a real pause command key signal in step (b) to provide a still image. The method of claim 2, The screen saver prevention method of the display device, characterized in that the screen saver image is provided if it is determined in step (b) not the real stop command key signal. The method according to any one of claims 1 to 4, Step (d) When the playback command key signal is received in the step (c), it is determined whether the stop command key signal determined in the step (b) is a real stop command key signal or a pause command key signal to play a normal video. How to prevent burn-in phenomenon of a display device.

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