KR20070110714A - Method for controling image processor when channel tuning - Google Patents

Abstract

A method for adjusting luminance when a channel of a video device is turned is provided to decrease a luminescent level of a current image gradually and increase the luminescent level of the current image at a second channel turning time gradually, thereby minimizing a luminance difference between a first channel and a second channel. A method for adjusting luminance when a channel of a video device is turned comprises the following steps of: applying tuning commands from a first channel to a second channel when a channel change is requested(S202); and gradually decreasing a luminance level of a current image of the video device first and then gradually increasing the luminance level of the current image until a predetermined luminescent level at a second channel turning time(S204,S208).

Description

How to adjust brightness when changing video channel {METHOD FOR CONTROLING IMAGE PROCESSOR WHEN CHANNEL TUNING}

1 is a block diagram illustrating a video device for implementing a method according to the present invention;

2 is a flowchart illustrating a luminance control process when changing a channel of an imaging apparatus according to an exemplary embodiment of the present invention;

3 is a graph showing the degree of brightness control according to the channel change according to the present embodiment.

<Explanation of symbols for the main parts of the drawings>

100 tuner unit 102 image processing unit

104: image output unit 106: key input unit

108: control unit 110: luminance control unit

The present invention relates to a channel changing technique of an imaging apparatus, and more particularly, to a method of adjusting luminance when changing a channel of an imaging apparatus suitable for reducing eye fatigue when changing a channel.

When a channel is changed while watching a video device, for example, a TV, eye fatigue may be increased in the process of changing the channel because the image information of the first channel and the second channel is different.

For example, since there is a difference in various image information such as contrast, color, and luminance components of the first channel and the second channel, it becomes a major cause of eye fatigue when the viewer continuously watches the video device when changing the channel. .

In order to compensate for this disadvantage, conventionally, there is a method of continuously outputting a signal from the tuner. That is, until the channel is changed, the screen of the first channel is continuously output and the screen of the second channel is output to reduce eye fatigue.

In addition, a method of reducing a visible level of a first channel and a second channel by inserting a screen having a constant luminance, for example, a white screen, during a channel change is proposed.

However, the first method may expose the noise on the screen as it is during the channel change. The second method may block the noise screen to some extent, but severe fatigue when the user continuously changes the channel in a dark place. It has the disadvantage of being able to feel it.

The present invention is to solve the above-mentioned technical limitations and all the problems, the brightness control when changing the channel of the video device to reduce the eye fatigue by gradually adjusting the brightness level in the process of changing the channel of the video device The purpose is to provide a method.

According to a preferred embodiment of the present invention for achieving the above object, as a method of controlling the video output in the process of changing the channel of the video device, when a channel change is requested, a tuning command is applied from the first channel to the second channel. And gradually decreasing the brightness level of the current screen of the video device and gradually increasing the brightness level of the current screen to a preset brightness level at the time of switching to the second channel. It provides a brightness control method when changing the channel.

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

1 is a block diagram of a video device for implementing a brightness control method according to the present invention, the tuner 100, the image processing unit 102, the image output unit 104, the key input unit 106, the control unit 108 ), The brightness control unit 110.

As shown in FIG. 1, the tuner unit 100 serves to lower the broadcast signal provided through the antenna 10 back to the original frequency and tune to a channel of a desired frequency band. Additionally, the tuner unit 100 suppresses amplification of noise included in the received signal as much as possible and amplifies only a desired signal.

The image processing unit 102 converts a broadcast signal of a channel tuned by the tuner unit 100 and provides the image output unit 104 to the image output unit 104. The image output unit 104 provides a broadcast provided by the image processing unit 102. It converts signals into displayable signals and outputs them to the outside.

The key input unit 106 is a key input unit formed on the front panel or the remote controller of the video apparatus, and generates a key signal corresponding to the user's key input action and applies it to the controller 108. Such a key input unit 106, for example, applies a key signal for changing from the original channel (the first channel) to the second channel at the time of channel change to the control unit 108, and the control unit 108 such a key input unit. The tuner unit 100 is selectively tuned and controlled in accordance with the key signal of 106.

The controller 108 performs overall control of the electronic device according to the key signal of the key input unit 106, and in particular, selectively controls the tuner unit 100 when a key signal according to a channel change is applied from the key input unit 106. To provide a control signal. For example, when a key signal for changing from the first channel to the second channel is provided from the key input unit 106, the channel tuning signal corresponding to the channel change key signal is applied to the tuner unit 100.

In this case, when a channel change request is requested from the key input unit 106, the control unit 108 may gradually reduce the luminance of the current screen of the video device and gradually increase the luminance control unit 110 according to the present embodiment. Serves to control.

The brightness controller 110 adjusts the brightness level of the current image processed by the image processor 102 under the control of the controller 108.

Hereinafter, with reference to the above-described configuration, with reference to the flow chart of Figure 2 with respect to the brightness adjustment process when changing the channel of the video device according to a preferred embodiment of the present invention will be described in detail.

As shown in FIG. 2, first, in step S200, the controller 108 determines whether a channel change key signal is applied from the key input unit 106, and when the channel change key signal is applied, the controller 108 performs a step ( Proceed to S202).

In step S202, the controller 108 transmits a tuning command to the tuner unit 100 and proceeds to step S204.

In step S204, the controller 108 controls the brightness controller 110 to gradually reduce the brightness level of the current image. In the following description, reference is made to the graph of FIG. 3.

At this time, the gradual decrease in the luminance level gradually increases the luminance level of the current screen by a preset ratio of the entire luminance level, for example, 10% when the total luminance level is assumed to be 100 within a range that does not change visually. Means to reduce.

As in step S204, the luminance level is gradually decreased, and as shown in FIG. 3, when the channel change switching point A is reached (S206), the controller 108 proceeds to step S208. That is, when it is desired to change from the first channel CH1 to the second channel CH2, it is determined whether it is time to change from the first channel CH1 to the second channel CH2.

In step S208, the controller 108 gradually increases the luminance level of the current screen. This increase in brightness level is also meant to increase stepwise by a ratio corresponding to 10% of the entire brightness level as in the case of the decrease in brightness level described above.

The controller 108 proceeds to step S210 to determine whether the luminance level of the current screen has reached the basic luminance information (B). The basic luminance information B may be, for example, a luminance level of a white screen.

As a result of the determination in step S210, when the basic brightness information B is reached, the controller 108 proceeds to step S212 to stop the brightness adjusting operation of the brightness controller 110.

That is, the present embodiment is implemented to gradually adjust the luminance level during the channel change process in order to minimize the difference between the excessive luminance component of the first channel and the second channel when changing the channel.

According to the present invention, the luminance level is gradually decreased from the luminance level of the current screen at the time of changing the channel in the video device, and the luminance level of the current screen is gradually increased until the basic luminance information is reached at the time of changing the channel. Excessive luminance component difference between the first channel and the second channel can be minimized, thereby reducing fatigue of the viewer and protecting eyesight.

The embodiments of the present invention have been described in detail above, but the present invention is not limited to these embodiments, and various modifications may be made by those skilled in the art within the spirit and scope of the present invention described in the claims below.

Claims (5)

As a method of controlling the video output in the process of changing the channel of the video device, If a channel change is requested, applying a tuning command from the first channel to the second channel; Gradually decreasing the brightness level of the current screen of the video device and gradually increasing the brightness level of the current screen to a preset brightness level at the time of switching to the second channel; The brightness control method when changing the channel of the video device including a. The method of claim 1, The gradual decrease and increase of the brightness level gradually decreases and increases the brightness level of the current screen by a predetermined ratio of the entire brightness level within a range that does not change visually. Way. The method of claim 2, And the preset ratio is 10% of the total luminance level. The method of claim 1, The brightness level of the current screen is gradually increased, but stops when the predetermined brightness level is reached. The method according to claim 1 or 4, And the preset luminance level is a luminance level of a white screen.

Images