KR20080057527A - Display apparatus - Google Patents

Abstract

A display device is provided to prevent the degradation of core components by automatically switching the output of a lamp according to peripheral conditions. A lamp(15) lights a display unit(14), and a stabilizer(16) adjusts the brightness of the lamp. A camera(17) picks up a peripheral image of the display unit. A main image processing unit(11) processes a received main broadcasting signal. A sub-image processing unit(12) processes a received sub-broadcasting signal and a camera image inputted from the camera. An image synthesizing unit(13) synthesizes the main broadcasting signal with the sub-broadcasting signal, and outputs the synthesized broadcasting signal to the display unit. A control unit(20) judges peripheral brightness and motion on the basis of the camera image processed through the sub-image processing unit, and controls the stabilizer on the basis of the judged result.

Description

Display device {DISPLAY APPARATUS}

1 is a control block diagram of a TV according to an embodiment of the present invention;

2 is a control flowchart of a TV according to an embodiment of the present invention.

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

10: antenna 11: main image processing unit

12: sub-image processing unit 13: image synthesis unit

14 display 15 lamp

16: ballast 17: camera

18: input control unit 19: user input unit

20: control unit

The present invention relates to a display device, and more particularly, to a display device having a PIP function.

In many cases, the use time of core components in a display device is limited. For example, in the case of DLP (Digital Light Processing) device, the usage time of the lamp is limited to about 8,000HR although the usage time of the lamp is different depending on the actual usage. Therefore, as the use time of the lamp becomes longer, the brightness of the screen is lowered to about 8,000HR, which is less than 50% of the initial brightness, so that the lamp needs to be replaced. However, since the price of a lamp is expensive, it is a big burden for a user.

 Accordingly, conventionally, the output of the lamp is adjusted in two stages according to the screen mode of the display apparatus. That is, according to the user's choice, the lamp can be used at high power and low power, and the service life of the low power mode is longer than the service life of the high power.

However, although the output of the lamp is adjustable according to the conventional user's selection, it is common for the user to use the high output mode without changing the screen mode. In particular, when used for display in stores, such as setting the screen mode to the brightest mode, the output of the lamp is maintained in a high output mode may cause a problem that the life of the lamp is shortened.

Accordingly, it is an object of the present invention to provide a display device capable of preventing deterioration of core components by automatically switching the output of a lamp according to the surrounding situation.

According to the present invention, there is provided a display apparatus having a PIP function, comprising: a display unit; A lamp for illuminating the display unit; Ballast for adjusting the brightness of the lamp unit; A camera for capturing the periphery of the display unit; A main image processor for processing the received main broadcast signal; A sub image processor for processing the received sub broadcast signal and a camera image input from the camera; An image synthesizer which synthesizes the main broadcast signal and the sub broadcast signal and outputs them to the display unit; And a controller for determining whether there is ambient brightness and movement based on the camera image processed by the sub-image processing unit, and controlling the ballast based on the determination result. .

The apparatus may further include an input intermitter configured to control an input path of the sub broadcast signal and the camera image to the sub image processor. The controller may control the input path such that the sub broadcast signal is input to the sub image processor in the PIP mode, and control the input path such that the camera image is input to the sub image processor in the camera photographing mode.

The controller may control the ballast so that the output of the lamp is high when the ambient brightness is bright and there is movement, based on the camera image, and when the ambient brightness is dark or there is no movement, The ballast can be controlled so that the output is low output.

The sub-image processing unit may include a decoder.

The apparatus may further include a user input unit for selecting the PIP mode and the camera photographing mode from a user.

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

An embodiment of the present invention will be described with reference to FIG. 1. 1 is a control block diagram of a TV according to an embodiment of the present invention.

As shown in FIG. 1, a TV according to an embodiment of the present invention includes an antenna 10, a main image processing unit 11, a sub image processing unit 12, an image photographing unit, a display unit 14, and a lamp 15. , Ballast 16, camera 17, input intermittent 18, user input 19, and controller 20.

The main image processing unit 11 and the sub image processing unit 12 process broadcast signals corresponding to the main screen and the sub screen, respectively, in the PIP mode, and the broadcast signals to be processed are called main broadcast signals and sub broadcast signals.

The main image processing unit 11 and the sub image processing unit 12 each include a tuner for tuning a broadcast signal having a frequency band corresponding to the tuning control signal of the control unit 20 to be described later, a demodulator for demodulating the tuned signal, and a demodulated signal. The decoder may include a decoder for decoding a broadcast signal, a scaler for adjusting a vertical frequency, a resolution, an aspect ratio, etc. according to an output standard of the display unit 14.

The broadcast signal processed by the main image processing unit 11 and the sub image processing unit 12 is synthesized by the image synthesizing unit 13 and output to the display unit 14.

On the other hand, the sub-image processing unit 12 decodes the camera image input from the camera 17 to be described later in addition to the broadcast signal, which will be described later.

The display unit 14 may be applied to various types of display modules such as digital light processing (DLP), liquid crystal display (LCD), plasma display penal (PDP), and the like, which display video data.

The lamp 15 is for illuminating the display unit 14, and the brightness is adjusted by the ballast 16. In the embodiment of the present invention, the brightness of the lamp 15 operates in two modes, a high output mode and a low output mode. The ballast 16 adjusts the brightness of the lamp 15 to either a high output mode or a low output mode according to a control signal of the controller 20 to be described later.

The camera 17 is for capturing the periphery of the display unit 14, and the TV includes a connection port to which the camera 17 is connected.

The camera image input from the camera 17 is input to the sub-image processing unit 12 and processed. The sub-image processing unit 12 decodes the camera image and outputs it to the controller 20 to be described later.

The TV according to an embodiment of the present invention may further include an input intermittent unit 18. The input intermittent unit may be any one of a sub-broadcast signal and a camera image under the control of the controller 20 to be described later. It can be implemented by the switching module by interrupting its input path so that it is input to

The user input unit 19 is for receiving data and / or control commands from a user, and may be provided with a remote controller, a mouse, a keyboard, or the like including a plurality of operation buttons, or may be provided on a main body panel of a TV. Here, the user input unit 19 may include a button for selecting a PIP mode or a camera photographing mode.

The controller 20 is responsible for overall control of the TV configuration, and can be implemented by a microcomputer, a micro controller unit (MCU), or the like. When the PIP mode is selected, the controller 20 controls the input intermitter 18 to control the sub-broadcast signal to be input to the sub-image processing unit 12. When the camera photographing mode is selected, the controller 20 controls the input intermitter 18. By controlling the camera image is input to the sub-image processing unit 12. In the exemplary embodiment of the present invention, when the camera does not operate in the PIP mode, the camera automatically operates in the camera photographing mode as an example.

In the camera photographing mode, the controller 20 determines whether there is a motion and brightness based on the camera image input from the sub-image processing unit 12, and operates the lamp 15 in a high output mode or a low output mode according to the determination result. The ballast 16 is controlled to control the ballast 16.

In detail, the controller 20 determines whether there is a difference between before and after images according to the data value of the camera image input from the sub-image processing unit 12 to determine whether to move, and determines the brightness based on the luminance value of the camera image. do.

In an embodiment of the present invention, the control unit 20 determines whether there is a movement and a high or low brightness, and the reference value may be variously set.

Examples of screen mode settings according to the surrounding environment are shown in Table 1 below.

<Table 1>

movement Ambient light Screen mode Lamp output Screen brightness U Go Dynamic High power ↑ radish Go Normal Low power ↓ U that Normal Low power ↓ radish that Normal Low power ↓

As shown in Table 1, the controller 20 controls the output of the lamp 15 to a high power as a dynamic mode when the motion is high and the ambient brightness is high. do.

As described above, according to the present invention, the sub-image processing module used in the existing PIP processing processes the camera image photographing the surrounding environment, so that the screen mode can be easily adjusted without adding a separate module.

A control method of a TV according to an embodiment of the present invention will be described with reference to FIG. 2. As shown in FIG. 2, when the PIP mode is not selected by the user (S10), the controller 20 controls the input intermitter 18 to input the camera image captured by the camera 17 to the sub-image processor 12. ) Is controlled (S11).

Then, the before and after images of the camera image decoded by the sub-image processing unit 12 are compared (S12). As a result of the comparison, when there is a difference between the before and after images, that is, when there is motion (S13), it is determined whether the brightness is above a predetermined level (S14). If the brightness is more than a predetermined level, the ballast 16 is controlled so that the output of the lamp 15 is a high output (S15).

If there is no movement or the brightness is not more than a predetermined level, the ballast 16 is controlled so that the output of the lamp 15 is low (S16).

On the other hand, when the user selects the PIP mode (S10), the control unit 20 controls the input intermitter 18 so that the sub-broadcast signal is input to the sub-image processing unit 12 (S17).

The input sub-broadcast signal is displayed on the display unit 14 through the PIP process of the sub-image processing unit 12 and the image synthesizing unit 13 (S18).

In the above-described embodiment, the term camera photographing mode is used, but other terms such as display mode may be used, and when the PIP mode is not selected, the camera photographing mode is automatically operated. However, the user input unit 19 is operated. Of course, the camera imaging mode can be selected.

In addition, although the TV has been described as an example of the display device, it can be applied to other display devices.

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that modifications may be made to the embodiment without departing from the spirit or spirit of the invention. . It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

As described above, according to the present invention, there is provided a display device that can prevent the deterioration of the core components by automatically switching the output of the lamp in accordance with the surrounding conditions.

Claims (5)

In a display device having a PIP function, A display unit; A lamp for illuminating the display unit; Ballast for adjusting the brightness of the lamp unit; A camera for capturing the periphery of the display unit; A main image processor for processing the received main broadcast signal; A sub image processor for processing the received sub broadcast signal and a camera image input from the camera; An image synthesizer which synthesizes the main broadcast signal and the sub broadcast signal and outputs them to the display unit; And And a controller configured to determine whether there is ambient brightness and motion based on the camera image processed by the sub-image processing unit, and control the ballast based on the determination result. The method of claim 1, An input control unit for controlling an input path of the sub broadcast signal and the camera image to the sub image processing unit; The controller controls the input path so that the sub broadcast signal is input to the sub image processing unit in the PIP mode, and controls the input path so that the camera image is input to the sub image processing unit in a camera photographing mode. Display device. The method according to claim 1 or 2, The controller controls the ballast such that the output of the lamp is high when the ambient brightness is bright and there is movement, based on the camera image, and the output of the lamp is dark when the ambient brightness is dark or there is no movement. Display device characterized in that for controlling the ballast to be a low output. The method of claim 3, And the sub-image processing unit comprises a decoder. The method of claim 4, wherein And a user input unit configured to receive the PIP mode and the camera photographing mode from a user.

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