KR20110056650A - Apparatus and mehtod for electric power consumption reducing in image display device - Google Patents

Abstract

The present invention relates to an image display device, and more particularly, to an apparatus and method for reducing power consumption in an image display device. Detecting an output time point of an advertisement broadcast in a broadcast output mode; Reducing the brightness or the audio of the image to a predetermined level at the detected commercial output point of time; Restoring the output level of the video or audio when the commercial is terminated.

Description

Apparatus and mehtod for electric power consumption reducing in image display device}

The present invention relates to an image display device, and more particularly, to an apparatus and method for reducing power consumption in an image display device.

Recently, set-top boxes or digital televisions, which can receive digital broadcasts that provide high-quality video and high-quality audio, have been widely used. Also, various types such as DMB (Digital Multi-media Broadcasting) broadcasts are used. Digital broadcasting is expected to be commercialized.

Meanwhile, in a digital broadcasting receiver such as the set top box, the digital television, and the DM receiver terminal capable of receiving the DM broadcast, broadcast program information provided through the digital broadcast, for example, service information (SI) Receive and store in memory. After searching and referring to electronic program guide (EPG) information included in the service information (SI), various broadcast program information is displayed on an on-screen display (OSD) image and broadcasted by a user. You can select a program to watch or set a scheduled recording more conveniently.

However, if an advertisement is displayed during the middle or the start / end of the viewing of the broadcast program, the user must watch the advertisement for the continuous start of the next program or the program being watched even if the user does not want to.

Therefore, there is a problem such as user discomfort and power consumption of the video display device is lost due to the broadcast output in the state that the user does not want.

Accordingly, the present invention is to solve the above problems, to provide an apparatus and method for controlling the frequency interference in the video display device to prevent the interference of the frequency band between each other when performing wireless communication of devices The purpose is.

The present invention for achieving the above object comprises the steps of detecting the output time of the commercial in the broadcast output mode; Reducing the brightness or the audio of the image to a predetermined level at the detected commercial output point of time; Restoring the output level of the video or audio when the commercial is terminated.

The present invention also includes a tuner unit for receiving broadcast data and receiving a PSIP broadcast signal for information data distinguishing an advertisement broadcast; A controller for detecting a broadcast by detecting a broadcast signal of the received PSIP; An image / audio adjusting unit for adjusting a brightness level of the image or an audio level according to the commercial detected by the controller; A backlight controller providing a dimming level for controlling the brightness of the backlight; The inverter may be configured to adjust an amount of current of the backlight according to a level provided by a backlight controller.

As described above, the present invention has an effect of reducing the user's awareness and reducing power consumption by adjusting the video and audio of the corresponding broadcast in the broadcast time domain not required by the user.

Hereinafter, exemplary embodiments of an apparatus and method for reducing power consumption in an image display device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a video display device to which the present invention is applied. Referring to FIG. 1, an image display apparatus according to an exemplary embodiment of the present invention includes a tuner unit 102, a demodulator 104, a demultiplexer 106, an audio / video decoder 108, and an audio / video controller ( 110, display 112, PSI / PSIP database 114, PSI / PSIP 116, decoder 116, controller 118, backlight controller 120, inverter 122, and memory 124. It consists of.

The tuner 102 may receive a digital broadcast signal including a Program and System Intermation / Program and System Information Protocol (PSI / PSIP) table. The PSI / PSIP table includes an event information table (EIT). In addition, in the case of an Internet Protocol TV (IPTV) according to an embodiment of the present invention, it may be broadcast data received from an external device (Set Top Box).

The demodulator 104 demodulates the signal tuned by the tuner unit! 02 into a VSB / EVSB (Vertigal Side Band / Enhanced Vstigal Side Band) signal.

The demultiplexer 106 demultiplexes the audio data, the video data, and the PSI / PSIP table data from the signal demodulated by the demodulator 104.

The demultiplexed PSI / PSIP table is sent to the PSI / PSIP decoder 116 and the demultiplexed audio data video data is sent to the audio / video decoder 108 and the audio / video decoder 108 is Decode the received data.

The PSI / PSIP decoder 108 parses the PSI / PSIP section and reads all remaining portion of the actual section data that the PSI / PSIP section does not perform in section filtering of the demultiplexer 106. The data is recorded in the PSIP database 114.

The audio / video control unit 110 analyzes the broadcast data stored in the PSI / PSIP database 114 and lowers the image brightness of the commercial at the point of time when the commercial is output according to an embodiment of the present invention. Performs a function to lower the level. In addition, when the commercial is terminated, the function restores the audio and video levels before the commercial from the time point at which the main broadcast starts.

The backlight controller 120 and the inverter 122 generate a control signal for driving the backlight of the panel of the display 112 and perform a function of supplying power thereto. In particular, the backlight control unit 120 according to an embodiment of the present invention generates a dimming level, which is a control signal for adjusting the backlight during the commercial time, and the inverter 122 is a level preset in the backlight unit by the dimming level. This function reduces the brightness of the screen by lowering the amount of current.

The memory unit 124 stores information about the brightness of the screen and the adjustment level of the backlight and the audio level to be adjusted at the advertisement broadcast time in the broadcast data output mode according to an exemplary embodiment of the present invention. The adjustment level may be directly received by the user and stored, or may be set and stored at a level low enough to be perceived by the viewer.

The controller 118 analyzes broadcast data received from the tuner 102 or an external input unit (not shown) according to an embodiment of the present invention, detects the commercial time according to the analysis result, and backlights at the corresponding time. And to adjust the luminance level of the image, and to adjust the audio level.

According to the configuration as described above with reference to Figures 2 to 6 will be described for the power saving operation according to an embodiment of the present invention.

2 is a flowchart illustrating an operation of reducing power consumption according to an embodiment of the present invention, FIG. 4 is a diagram illustrating a broadcast data structure according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating an event information table (EIT) according to the present invention. FIG. 6 is an exemplary diagram illustrating an example of a bit stream syntax, and FIG. 6 is an exemplary diagram illustrating an example of syntax of an advertisement descriptor (advertisement_descriptor) according to an embodiment of the present invention.

The image display device according to an embodiment of the present invention performs a broadcast output mode for outputting audio and video received from the tuner 102 or an external signal input unit (not shown) (step 205). As shown in (a) and (b) of FIG. 4, a commercial time point such as a time point at which the commercial is output before the first program ends and the second program is started, or a time point at which the commercial is output during the first program output. Determine the cognition.

The time point of the commercial broadcast can be detected based on information included in the broadcast data input as shown in FIGS. 5 to 6.

The event information table (EIT) is one of the tables of the PSIP including information on a title, a start time, and the like for an event of a virtual channel.

The EIT consists of a plurality of fields.

The "table_id" field consists of 8 bits and has a value of '0xCB', which means that the section belongs to the EIT.

The "section_syntax_indicator" field consists of 1 bit and has a value of '1', in this case, this section means that the "section_length" field follows the generic section syntax beyond.

The "private_indicator" field is composed of 1 bit and may have a value of '1'. However, in relation to the present invention, a problem that is particularly problematic is a defined descriptor under a for-loop. The detailed descriptions of the other fields will be omitted.

In the descriptor part of the hatched portion in FIG. 5, the advertisement descriptor shown in FIG. 6 is defined. As shown in FIG. 6, the "descriptor_tag" field includes information for identifying that the descriptor is an advertisement descriptor. The "descriptor_tag" field may have a value of '0x91', which may be flexible. The "descriptor_length" field may include information in byte units defining the length from the next field to the last field of this descriptor.

The "advertisement_count" field includes information on the number of commercial programs belonging to the event. The "duration" field contains information about the program duration of the commercial. In the exemplary embodiment of the present invention, a code indicating a part of an advertisement is described, but in addition, advertisements are classified according to types of broadcasts such as broadcasts and commercials according to information according to broadcast data received from broadcasting stations. The broadcast output time can be detected.

As described above, if it is detected that the commercial is output during the broadcast output mode, it is determined whether the output mode for the commercial is set (step 215). If there is a preset commercial output mode, the image is output when the commercial is output. The luminance level is lowered to a predetermined level. In this case, the audio may also be lowered to a predetermined level so as to lower the degree of recognition of the output of the commercial (step 220).

Accordingly, the brightness and audio level of the image are reduced to a predetermined level according to the criterion of the advertisement output mode. The advertisement is output (step 225). The luminance and audio levels are restored to the state before the commercial output, and the video and audio of the broadcast are output (step 235).

Accordingly, as the video and audio are not desired by the user at the time when the commercial is output as described above, the luminance level and audio level of the corresponding video are reduced during the output period of the commercial to reduce power consumption. .

3 is a flowchart illustrating an operation of reducing power consumption according to another exemplary embodiment.

As shown in the operation flowchart of FIG. 2, the image display device detects that the commercial broadcast is output while the broadcast output mode is received, and determines whether the commercial output mode is set (steps 305 to 315).

In the broadcast output mode, when the advertisement output time is detected, the inverter 122 according to the control signal of the backlight controller 120 to adjust the current flowing into the backlight (not shown) configured on the back of the display unit 112. The value is decreased by a predetermined level. In this case, in the case of the commercial including audio, the level of the output audio is also reduced to a predetermined level (step 325) to output the commercial (step 330).

When it is sensed that the commercial time is up (step 335), the current level and audio level of the reduced backlight are restored to the level before the commercial, so that the present broadcast can be output (step 340).

According to another exemplary embodiment of the present invention, when detecting a commercial point of time, the power consumption is reduced for a predetermined time by reducing the amount of current applied to the backlight adjusting the kfrrl of the display unit, thereby providing an effect of power consumption and user's viewing convenience. You can do that.

In an exemplary embodiment of the present invention, for example, an advertisement broadcast is output when the broadcast program is connected to the middle of the broadcast program or when the first and second programs are connected. However, in the case of IPTV, a predetermined amount of data is stored for a predetermined time before the program starts. It is possible to adjust the brightness of the video by detecting the advertisement time output during the download.

1 is a block diagram of a video display device to which the present invention is applied.

2 is a flowchart of an operation of reducing power consumption according to an exemplary embodiment.

4 is a diagram illustrating a broadcast data structure according to an embodiment of the present invention.

5 is an exemplary diagram illustrating an example of a bit stream syntax for an event information table (EIT) according to the present invention.

6 is an exemplary diagram illustrating an example of syntax of an advertisement descriptor (advertisement_descriptor) according to an embodiment of the present invention.

Claims (9)

Detecting an output time point of an advertisement broadcast in a broadcast output mode; Reducing the brightness or the audio of the image to a predetermined level at the detected advertisement output time; And restoring the output level of the video or audio when the commercial is terminated. The method of claim 1, wherein reducing the brightness level of the image The method of reducing power consumption in a video display device, characterized in that to reduce the video brightness of the commercial to a predetermined level or less when the output point of the commercial is detected. The method of claim 1, wherein the reducing of the brightness level of the image comprises: And reducing the current applied to the backlight to reduce the brightness of the backlight to a predetermined level or less when the commercial output point is detected. The method of claim 1, wherein the advertisement output point of time is detected in an event information table (EIT) received as broadcast data. In the video display device, A tuner unit for receiving broadcast data and receiving a PSIP broadcast signal for information data distinguishing an advertisement broadcast; A controller for detecting a commercial by detecting a broadcast signal of the received PSIP; An image / audio adjusting unit for adjusting a brightness level of an image or an audio level according to an advertisement broadcast detected by the controller; A backlight controller providing a dimming level for controlling the brightness of the backlight; And an inverter for adjusting an amount of current of the backlight according to a level provided by the backlight controller. The apparatus of claim 5, wherein the image / audio controller adjusts the brightness level of the image to reduce the brightness level of the image of the commercial to a predetermined level or less. The apparatus of claim 5, wherein the image adjusting unit and the backlight control unit restore the brightness level or the backlight current level of the image before the commercial when the output of the commercial is terminated. The apparatus of claim 5, wherein the image display device further comprises a memory unit configured to store information for determining that the image data is commercial data, and to store a reference level value for reducing the brightness of the audio or image in the commercial segment. Device for reducing power consumption in video display equipment. The apparatus of claim 5, wherein the controller detects data defined in a descriptor of an event information table (EIT) from the input broadcast data as a commercial.

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