KR100863856B1 - Monitor, method of controlling automatically a brightness and sharpness for a moving picture on a monitor - Google Patents

Abstract

The present invention relates to a method for automatically detecting whether an image input to a monitor is a moving picture or a window screen and automatically adjusting the brightness and sharpness of the screen accordingly. A feature of the automatic adjustment method according to the present invention includes detecting a front porch and a back porch of an image signal for each input frame, and determining whether the front porch and the back porch change according to each frame. And, if the front porch and the back porch change according to a frame, determining the input image as a moving image and increasing brightness and clarity of the screen.

According to the present invention, it is possible to automatically detect whether an input image is a video or a window screen, and adjust brightness and sharpness of the screen accordingly.

Video, sharpness

Description

MONITOR, METHOD OF CONTROLLING AUTOMATICALLY A BRIGHTNESS AND SHARPNESS FOR A MOVING PICTURE ON A MONITOR}

1 is a flowchart illustrating a method of adjusting brightness and sharpness of a video screen in a monitor according to the related art.

Figure 2 is a block diagram schematically showing the internal configuration of the monitor according to the present invention.

3 is a flowchart illustrating a method for automatically adjusting brightness and sharpness of a moving picture screen in a monitor according to the present invention.

4 is a timing diagram illustrating a front porch and a back porch of a video signal.

5 is a timing diagram illustrating a front porch and a back porch of a video signal with respect to frames forming a window screen.

6 is a timing diagram illustrating a front porch and a back porch of a video signal with respect to frames constituting a moving picture screen;

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

200: image processing unit

202: summer

204, 206: voltage comparator                 

208: Timing Counter

210: micom

The present invention relates to a method for automatically adjusting screen brightness and sharpness of a monitor. More particularly, the present invention relates to a method for automatically detecting whether a video input to a monitor is a video or a window screen and automatically adjusting the brightness and sharpness of the screen accordingly. It is about.

In general PC environment, the window output based on the still image of the monitor is the mainstream, but as the multimedia functions have been strengthened recently, the frequency of video use is increasing on the PC.

However, a general PC monitor has a problem in that its brightness and clarity are inferior in implementing a video such as a TV.

In order to solve this problem, the method of increasing the brightness and the sharpness of PC monitors has recently been applied, but most of the PC environment is mainly based on window-based text screens, and the brightness and sharpness are improved. If you do, there is a disadvantage that the character is worse.

As another method for solving the above-described problem, as shown in FIG. 1, when the displayed screen of the PC monitor is switched (step 100), it is determined whether the user is a video screen or a window screen (step 110). If it is a video screen, the brightness and clarity of the screen are increased (step 130), otherwise the brightness and clarity of the screen is reduced. Such a method is cumbersome to be selected by the user whenever the video screen and the window screen are changed.

An object of the present invention is to provide a method of automatically recognizing a moving picture and a window screen by detecting an image input signal and recognizing whether there is a change in screen outline, and automatically adjusting the brightness and sharpness of the screen accordingly.

A feature of the method for automatically adjusting the screen brightness and sharpness of the monitor according to the present invention for achieving the above object is the step of detecting the front porch and back porch of the video signal for each input frame, the front porch and the back Determining whether the porch changes according to each frame; and if the front porch and back porch change for each frame, determining the input image as a video and increasing brightness and clarity of the screen. do.

At this time, if the front porch and the back porch for each frame is not changed, it is preferable to further determine the input image as a window screen, and to reduce the brightness and sharpness of the screen.

According to the present invention, when the screen is switched, it is possible to automatically detect whether the converted screen is a video screen or a window screen, and accordingly, the brightness and sharpness of the screen can be automatically adjusted.

Hereinafter, a method of automatically adjusting brightness and sharpness in a monitor according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram schematically showing the internal configuration of a monitor according to the present invention, Figure 3 is a flow chart illustrating a method for automatically adjusting the brightness and sharpness of the monitor according to the present invention.

Referring to FIG. 2, the image processor 200 includes an adder 202, voltage comparators 204 and 206, and a timing counter 208, and R, G, and B image signals and horizontal / vertical synchronization signals. Is input, and the front porch and the back porch are detected from the input signals and output to the microcomputer 210. Next, the microcomputer 210 adjusts the brightness and the sharpness of the screen by using data regarding the front porch and the back porch input from the image processor 200.

Referring to Fig. 3, the operation according to the above-described configuration will be described in detail.

First, when the screen change is detected (step 300), the image processing unit detects the front porch and back porch of the video signal for each frame input, and then transmits to the microcomputer (step 310). . In this case, as shown in FIG. 3, the front porch of the video signal refers to a part of the composite video signal that is ahead of the horizontal sync pulse during the retrace period of the composite video signal, and the back porch is the retrace period of the composite video signal. This is the back of the horizontal sync pulse.

According to the present invention, the window screen has the same back porch and front porch for each frame as shown in FIG. 4, and the video screen allows the front porch and back porch for each frame to change as shown in FIG. 5. Use the properties that become.

Accordingly, the microcomputer determines whether the front porch and the back porch change according to the frame by using the information of the front porch and the back porch of the video signal for each input frame (step 320). Next, if the front porch and the back porch for each frame are constant, it is determined as a window screen (step 330), and the brightness and sharpness of the screen are reduced (step 340). However, if the front porch and the back porch change according to the input frame, it is determined as a video screen (step 350) and the brightness and sharpness of the screen are increased (step 360).

According to the present invention, when switching the screen of the PC monitor automatically detects whether the converted screen is a window screen or a video screen, and if the video screen increases the brightness and sharpness of the screen, and if the window screen reduces the brightness and sharpness of the character To improve.

Claims (3)

Detecting a front porch and a back porch of an image signal for each input frame; Determining whether the front porch and the back porch change according to the detected frames; And, And varying the brightness and the sharpness of the screen selectively according to whether the front porch and the back porch are changed. The method of claim 1, The step of selectively changing the brightness and sharpness of the screen When the front porch and back porch changes according to each frame, determining the input image as a video screen and increasing the brightness and clarity of the screen; If the front porch (Back Front) and the back porch (Back Porch) according to each frame is constant, determining the input image as a window screen to reduce the brightness and sharpness of the screen comprising a How to adjust screen brightness and sharpness. An image processor detecting a front porch and a back porch of an image signal for each input frame; A microcomputer that determines whether the front porch and back porch data are changed for each detected frame, and selectively increases or decreases the brightness and sharpness of the screen according to whether the data is changed; And, And an image output unit configured to output the input image signal based on the brightness and clarity of the screen which is increased or decreased according to the control signal of the microcomputer.

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