KR20030089273A - Equipment and Method for Controlling Image of Monitor - Google Patents

Abstract

PURPOSE: An apparatus and a method for adjusting a picture of a monitor are provided to compensate reduction of brightness due to output of a video signal having a low level by improving partial or whole brightness of a screen. CONSTITUTION: A user interface unit(21) is provided so that a user inputs contrast and an auxiliary brightness set command. A microcomputer(22) outputs a contrast adjusting signal according to the contrast set contents of the user and outputs auxiliary brightness generating information to adjust brightness at a picture area corresponding to the contrast set contents. An OSD(On Screen Display) integrated circuit(23) generates an auxiliary brightness signal corresponding to the auxiliary brightness generating information of the microcomputer. A video processor(24) overlaps the contrast adjusting signal with the auxiliary brightness signal, and amplifies an external input video signal by an amplification gain corresponding to a level of the overlapped signal. A CRT(Cathode Ray Tube)(25) displays output of the video processor.

Description

Equipment and Method for Controlling Image of Monitor

The present invention relates to a monitor, and in particular, to an apparatus and method for adjusting an image of a monitor.

FIG. 1 is a block diagram illustrating a schematic configuration of a conventional monitor. An on-screen display for generating an additional image including a user interface unit 11 for inputting various operation commands and a screen adjustment menu. : OSD) integrated circuit (hereinafter referred to as OSD integrated circuit) 13, an image processor 14, a CRT (Cathode Ray Tube) 15, and a user for image processing to display an externally input image signal on a screen. It consists of a microcomputer 12 for controlling each part to correspond to the operation command of.

At this time, the image processing unit 14 is a video preamplifier 14a for amplifying the image at a variable amplification rate in accordance with a pulse width modulation (PWM) pulse signal output from the microcomputer 12, and the video preamplifier at a fixed amplification rate. And a video power amplifier 14b for amplifying the output of the amplifier 14a.

Referring to FIG. 1, when a user presses a Menu-Key of the user interface 11, the microcomputer 12 recognizes this and outputs an OSD image signal (OSD R / G / B). The integrated circuit 13 is controlled to display menus related to parameter adjustment on the screen of the CRT 16. When the user selects a parameter to be adjusted by using a selection key, the current setting state of the parameter is displayed. ), And the user can change the data value of the set parameter by using the Up / Down key.

For example, when the user views the menu and selects the contrast adjustment and sets the appropriate data with the up / down keys, the microcomputer 12 generates and outputs a contrast adjustment signal PWM for contrast adjustment. The contrast adjustment signal PWM is converted into an analog signal, amplified, and then input to the contrast terminal CONT of the video preamplifier 14a.

The video preamplifier 14a is a variable amplifier unit. The video preamplifier 14a receives a video signal R / G / B input from a video card of the PC 10 through a sub-sub terminal. Amplifies according to the DC level of the contrast adjustment signal PWM input.

That is, the amplitude of the video signal (R / G / B) is made by DC control, it is usually adjusted by a control voltage that can vary from 0 to 4V DC.

The video power amplifier 14b is a fixed amplifier, and amplifies the output of the video preamplifier 14a to drive a cathode of the CRT 15.

However, in a conventional monitor, since the amplification level of the video signal is controlled by the DC level of the contrast adjustment signal (PWM), it is possible to adjust the brightness of the screen as a whole, but not in part, so it is possible to adjust a video or DVD (Digital Versatile Disc) image. As described above, when an image signal having a lower signal level than that of the broadcast image is input, the luminance of the corresponding screen area is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to partially adjust the brightness of the screen so that the image adjusting apparatus of the monitor can compensate for the brightness of the corresponding screen due to the video signal having a low signal level; The purpose is to provide a method.

1 is a block diagram showing a schematic configuration of a monitor according to the prior art;

2 is a block diagram showing the configuration of an image adjusting device of a monitor according to the present invention;

3 is an output waveform diagram of each part of FIG.

4 is a flowchart illustrating a method of adjusting an image of a monitor according to the present invention.

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

20: PC 21: the user interface unit

22: micom 23: OSD integrated circuit

24: image processing unit

24a: Video Preamplifier 24b: Video Power Amplifier

25: CRT

In accordance with an aspect of the present invention, an apparatus for adjusting an image of a monitor includes: a user interface unit for a user to input a contrast and auxiliary luminance setting command, a contrast adjustment signal according to the user's contrast setting, and an auxiliary luminance; A microcomputer for outputting auxiliary luminance generation information for adjusting luminance in a screen area corresponding to the setting contents, an OSD integrated circuit for generating an auxiliary luminance signal corresponding to the auxiliary luminance generation information of the micom, and the contrast adjustment signal and the auxiliary luminance And an image processor for superimposing the generated signals and amplifying the external input image signal with an amplification gain corresponding to the level of the superimposed signals, and a display unit for displaying the output of the image processor on the screen.

More specifically, the auxiliary luminance setting command may include a luminance level, a size, and a position.

In the image adjusting method of the monitor using the above apparatus, in a monitor having an image processor, a controller, and an OSD integrated circuit, when a user selects an auxiliary luminance item from a screen adjustment menu, the controller controls the OSD integrated circuit to display a luminance level and an area. Displaying a detailed item for setting a value, and if the user sets at least one or more of the displayed detailed items, a control unit separates a video signal for changing the luminance of an area according to the detailed item setting information by a corresponding level Transmitting signal generation information to the OSD generating unit so that the first and second OSD generating units generate the auxiliary luminance generating signal according to the signal generating information, and superimposing the auxiliary luminance generating signal and the contrast adjustment signal and overlapping the overlapping signal. Increase the external video signal by varying the amplification factor according to the level of And a step of display.

In more detail, an area setting range among detailed items of the auxiliary luminance item is a part or the entire area of the screen.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, the apparatus for adjusting an image of a monitor according to the present invention outputs a contrast adjustment signal according to a user's contrast setting content, and a user interface 21 for a user to input a contrast and auxiliary brightness setting command. And an OSD integrated with the microcomputer 22 for outputting auxiliary luminance generation information for adjusting luminance in a screen area corresponding to the auxiliary luminance setting content, and for generating an auxiliary luminance signal corresponding to the auxiliary luminance generation information of the microcomputer 22. The image processing unit 24 and the image processing unit 24 for superimposing the contrast adjustment signal and the auxiliary luminance generating signal and amplifying an external input video signal with an amplification gain corresponding to the level of the superimposed signals. And a CRT 25 for displaying the output on the screen.

The operation of the image adjusting device according to the present invention configured as described above is as follows.

First, when the user presses the menu key through the user interface unit 21, the microcomputer 22 recognizes this and controls the OSD integrated circuit 23, and the OSD integrated circuit 23 accordingly displays the OSD image for configuring the menu screen. A signal OSD R / G / B is output and this signal is displayed on the screen of the CRT 25 through the image processor 14.

Then, the user selects the sub luminance setting menu on the menu screen and adjusts parameter values related to the sub luminance setting. That is, horizontal position items Ha and Hb, vertical position items Va and Vb, horizontal size item SH, vertical size item SV, and luminance amplification gain item Gain.

The microcomputer 12 outputs the adjusted parameter values of the user to the OSD integrated circuit 13 through an I2C bus (not shown), and the OSD integrated circuit 13 according to the parameter values is shown in FIG. A luminance adjustment signal V0 is generated and output.

Subsequently, the video preamplifier 24a is a variable amplifier, and receives the contrast adjustment signal PWM and the auxiliary luminance adjustment signal V0 input through the contrast terminal CONT as shown in FIG. 3, and superimposes them. According to (CONT + V0), the V1 waveform obtained by amplifying the video signal R / G / B input from the PC 20 is outputted with different amplification gains for the auxiliary luminance setting area A and other portions.

The video power amplifier 24b is a fixed amplifier implemented in hardware and inverts and amplifies the phase of the image signal V1 output from the video preamplifier 24a (V2). ) Is applied to the cathode of the (Cathode) so that the video signal is displayed through the screen of the monitor.

An image adjusting method of the image adjusting apparatus of the monitor described above will be described with reference to FIG. 4.

The microcomputer 22 determines whether there is an auxiliary luminance setting key input from the user (S41).

As a result of the determination (S41), if the auxiliary luminance setting key is input, the sub-items of the auxiliary luminance setting menu are displayed on the OSD screen (S42), and if there is no auxiliary luminance setting key input, waiting for a new key input. Return to.

Sub-items of the auxiliary luminance setting menu include a horizontal position item, a vertical position item, a horizontal size item, a vertical size item, and a luminance amplification gain item in the auxiliary luminance setting area.

Here, the horizontal position item and the vertical position item are items for adjusting horizontal and vertical edge positions (Ha, Hb / Va, Vb) in the auxiliary luminance setting area A, respectively, and the horizontal size item and the vertical size item. The items are items for adjusting the horizontal and vertical sizes SH and SV of the auxiliary brightness setting area A, respectively, and the brightness amplification gain items are the amplification gains in the auxiliary brightness setting area A. This item is to adjust.

Subsequently, it is determined whether the user has completed area setting or brightness setting for the auxiliary luminance setting area A (S43).

If the user has not completed the corresponding key input to the auxiliary luminance setting area A, the user returns to the state waiting for a new key input, and if the user completes the corresponding adjustment key input to the auxiliary luminance setting area A, the microcomputer 22 outputs auxiliary luminance generation information to the OSD integrated circuit 23 so that a corresponding luminance value is adjusted in an area according to a user's setting (S44).

Subsequently, the OSD integrated circuit 23 generates an auxiliary brightness adjustment signal V0 according to the auxiliary brightness generation information and outputs the auxiliary brightness adjustment signal V0 to the video preamplifier 24a.

The auxiliary luminance adjustment signal V0 receives the luminance amplification gain input in the display period of the auxiliary luminance setting region A determined through input of an adjustment key corresponding to a horizontal / vertical size item and a horizontal / vertical position item. It is a signal having a pulse height and having a value of 0 outside the auxiliary luminance setting area A.

The video preamplifier 24a superimposes the auxiliary luminance adjustment signal V0 and the contrast adjustment signal PWM from the OSD integrated circuit 23 (S45), and changes the amplification gain according to the level of the superimposed signals. The luminance level of the video signal R / G / B from the PC 20 is amplified and output.

Subsequently, the output is re-amplified by the fixed amplification gain in the video power amplifier 24b and then applied to the cathode of the CRT 26 to process the image signal to be displayed on the screen of the monitor (S46). .

The image adjusting device and method of the monitor of the present invention as described above has the following effects.

First, since the luminance of a part or the entirety of the screen can be improved, the image quality can be improved by compensating for the reduction in luminance due to a signal output having a low image signal level, such as a video or a DVD image.

Second, since the brightness can be freely adjusted according to the user's control, it is possible to produce by lowering the brightness adjusted by the preset when the monitor is manufactured.

Third, since the brightness is adjusted using the contrast adjustment signal, no additional hardware is required.

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 (4)

A user interface for a user to input a contrast and auxiliary luminance setting command, A microcomputer that outputs a contrast adjustment signal according to the user's contrast setting contents and outputs auxiliary luminance generation information for adjusting the luminance in a screen area corresponding to the auxiliary luminance setting contents; An OSD integrated circuit which generates an auxiliary luminance signal corresponding to the auxiliary luminance generation information of the micom; An image processor for superimposing the contrast adjustment signal and the auxiliary luminance generating signal and amplifying an external input video signal with an amplification gain corresponding to the level of the superimposed signal; And a display unit for displaying the output of the image processor on a screen. The method of claim 1, And an auxiliary luminance setting command includes a luminance level, a size, and a position. In a monitor having an image processor, a controller, and an OSD integrated circuit, If a user selects an auxiliary luminance item from a screen adjustment menu, the controller controls the OSD integrated circuit to display detailed items for setting luminance levels and areas; When the user sets at least one of the displayed detailed items, the controller generates signal generation information to the OSD generator so that a separate video signal is generated to change the luminance of the area according to the detailed item setting information by the corresponding level. Transmitting step, Generating, by the OSD generator, an auxiliary luminance generation signal according to the signal generation information; And amplifying and displaying an external image signal by superimposing the auxiliary luminance generating signal and a contrast adjustment signal and varying the amplification rate according to the level of the superimposed signal. The method of claim 3, The area setting range of the sub-item of the sub-luminance item is a partial or full area of the screen.