KR100493324B1 - display device - Google Patents

Abstract

An object of the present invention is to provide a display device capable of realizing natural image quality of an image source region by enabling independent color control of the image source region when reproducing a PC signal including an image source. A PC signal conversion apparatus for converting a PC signal of a format into a signal suitable for a television receiver, comprising: an A / D converter for converting an input analog PC signal into a digital signal and outputting the input digital PC signal to a signal conversion method; A TMDS (Transmission Minimized Differential Signaling) receiver for converting horizontal / vertical synchronization signals and digital video signals and outputting the signals; and MUX for selectively outputting signals output from the A / D converter and TMDS receiver, and output from the MUX. Image source specified by the user or via program information on the PC An image source color control unit for performing color control on the inverse RGB signal to an RGB signal suitable for a TV receiver, a format converter for vertically and horizontally scaling digital image data output from the image source color control unit, and the format converter It is configured to include a panel to display the screen by restoring and driving the output signal output from the.

Description

Display device

The present invention relates to a display device capable of independently performing color control for an image source area when displaying a PC signal including an image source on a screen.

Recently, digital display devices are manufactured to reproduce various signals such as PC signals and TV signals (S-VHS, composite and HDTV signals) using flat panels such as LCD and PDP.

In addition, most display devices provide various functions of arranging screens such as picture in picture (PIP) in case of simultaneously viewing a PC signal and a TV signal.

At this time, the PC signal and the TV signal are different from each other, so in order to feel a natural color when viewing, color-related elements such as brightness, gradation, and gamma must be adjusted according to characteristics of each signal.

Therefore, the signal processor on the display device is configured to differentially perform color control for each signal.

1 is a diagram illustrating a signal processor on a display device according to the prior art.

As shown in FIG. 1, when the input PC signal is an analog signal, the input PC signal is input to the A / D converter 110 and the digital signal is input to the TMDS receiver 120. The signal output from the A / D converter 110 and the TMDS receiver 120 is output to the panel 200 via the MUX 130 and the format converter 140.

Color-related factors that can be adjusted for PC signals through this path include brightness, gradation, and gamma.

In addition, after the input TV signal is decoded by the video decoder 150, the I / P converter 160 converts the coded signal into a YUV signal as an input. Subsequently, the YUV signal output from the I / P converter 160 is output to the panel 200 via the format converter 140.

The color-related elements that can be adjusted through this path include brightness, gradation, gamma, hue, saturation, and sharpness.

As such, when a user views a PC signal, a TV signal, or views two types of signals together through a PIP, each signal is displayed in a certain area on the screen through an appropriate color control system according to characteristics.

On the other hand, in recent years, as the multimedia content is rapidly increasing, video sources are increasingly viewed through a PC. These video sources include pictures made through digital cameras or scanners, videos made using MPEG technology, and TV cards for PCs. TV images generated and the like.

When the PC signal including such an image source is reproduced in the existing display device illustrated in FIG. 1, since the format of the signal recognized by the display device is a PC signal, the color processing for the PC signal is performed by the signal processor 100 in the device. The system will be applied.

However, the contents actually intended to be shown in the PC signal including the image source has the characteristics of the TV signal, but the color control system is unnatural when viewing because the application of the PC signal is as low as the application of the TV signal. A problem occurs.

For example, on a LCD monitor that is controlled for brightness in a general office environment, the brightness may be perceived as low when watching TV signals or MPEG video signals from a PC TV card.

As described above, the conventional display apparatus does not recognize the type of signal based on the content to be displayed by the signal but recognizes the signal according to the physical form of the signal (PC signal or TV signal). .

As a result, when the image source region is included in the PC signal, it is apparent that the conventional PC signal processing method has a limitation in color control with respect to the image source region.

Accordingly, the present invention has been made to solve the above problems, and when the PC signal containing the image source is reproduced, the independent color control of the image source region can be performed to realize a natural image quality of the image source region. It is an object to provide a display device.

Another object of the present invention is to provide a display device capable of adjusting a color of a portion of a screen according to a user's needs regardless of the type of a signal to be reproduced.

A feature of the display device according to the present invention for achieving the above object is in the PC signal conversion device for converting a PC signal of the RGB format output from the PC into a signal suitable for a television receiver, the input analog PC signal of the digital An A / D converter for converting the digital PC signal into a horizontal / vertical synchronization signal and a digital video signal by a signal conversion method, and outputting a TMDS (Transmission Minimized Differential Signaling) receiver; RGB suitable for TV receiver with RGB signal for MUX which is selectively output among the signals output from the D converter and TMDS receiver, and the image source area specified by the user for the signal output from the MUX or through program information on the PC Image source color control unit for color control by the signal, the digital output from the image source color control unit And a format converter for scaling the vertical / horizontal data, restoring is take the output signal from the format converter and by driving it consists of including a panel for displaying a screen.

At this time, the image source color control unit is an image source region extraction unit for distinguishing the image source region according to the user input or program information on the PC from the PC signal, and the color of the specific region identified by the image source region extraction unit Perform color adjustment by actually applying color adjustment information of the image source area on the PC signal according to the color adjustment information input unit which receives the type and degree of adjustment from the user and the information received from the color adjustment information input unit. And a signal resynthesizing unit for synthesizing the signals of the rest of the image source region extracting unit except the image source region and the resultant signal of the color adjusting unit and finally resynthesizing the PC signal. have.

And a color space converting unit converting a signal of a region determined by the image source region extracting unit from an RGB format to a YUV format according to a color space conversion formula, and a signal converted from the color space converting unit to a YUV format. A color control unit for generating a signal subjected to color adjustment by transforming the signal according to the information obtained by the color control information input unit, and a color space inverse converter for inverting the YUV signal subjected to color adjustment in the color control unit back to an RGB signal. It is composed by another feature.

In this case, the image source color control unit may include brightness, gradation, gamma, hue, saturation, and sharpness as color-related elements that can control a signal.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

A preferred embodiment of the display station according to the present invention will be described with reference to the accompanying drawings.

2 is a diagram illustrating a signal processor on a display device according to the present invention.

Referring to FIG. 2, the A / D converter 110 converts the input analog PC signal into digital and outputs the digital analog signal, and converts the input digital PC signal into a horizontal / vertical synchronization signal and a digital video signal by a signal conversion method. Transmission Minimized Differential Signaling (TMDS) receiver 120, MUX 130 for selectively outputting signals output from A / D converter 110 and TMDS receiver 120, and MUX 130 An image source color control unit 300 for performing color control of an RGB signal to an RGB signal suitable for a TV receiver with respect to an image source region designated by a user or through a program information on a PC. A video decoder 150 for decoding the signal, an I / P converter 160 for converting the video signal decoded by the video decoder 150 into a digital signal displayable on the screen, and the image source color. A format converter 140 for scaling the digital image data output from the cutting unit 300 and the I / P converter 160 vertically and horizontally, and the output signal output from the format converter 140 are applied and restored. It is composed of a panel 200 for driving to display a screen.

This path allows the PC signal to control not only the brightness and gradations and gradations that are related to color, but also the hue, saturation and sharpness, which can only be adjusted on TV signals. Will be.

As a result, even when the image source region is included in the PC signal, there is no limit in color control for the image source region.

Therefore, in the present invention, in the processing of the PC signal, it is possible to perform separate color adjustment for the image source region that is directly designated by the user or designated through program information on the PC.

3 is a view showing in detail the image source color control unit in the signal processing unit on the display device according to the present invention.

As shown in FIG. 3, an image source region extracting unit 310 which distinguishes an image source region according to a user input or program information on a PC from a PC signal, and a specific region separated by the image source region extracting unit 310. The color control information input unit 320 that receives the type and degree of color control for the user from the user and the color control information for the image source area on the PC signal according to the information received from the color control information input unit 320 is actually applied. A color adjustment unit 330 for performing color adjustment, signals from the remaining portions other than the image source region in the image source region extraction unit 310, and a result signal of the color adjustment unit 330 Finally, it is composed of a signal recombination unit 340 for resynthesizing the PC signal.

The color adjusting unit 330 converts a signal of a region determined by the image source region extracting unit 310 from a RGB format to a YUV format according to a color space conversion formula, and the color. A color adjusting unit 334 for generating a signal in which color adjustment is performed by transforming the signal converted into the YUV format by the space converting unit 332 according to the information obtained by the color adjusting information input unit 320, and the color adjusting unit ( In 334, a color space inverse transform unit 336 converts the YUV signal subjected to color adjustment back into an RGB signal.

In this case, the image source region extractor 310 extracts a signal corresponding to the image source region existing in the PC signal after receiving the PC signal. In this case, in order to extract a signal corresponding to the image source region, a criterion for determining which part of the PC signal is the image source region is required, which may be set in two methods of FIGS. 4A and 4B.

The first method is a method of receiving a user's direct input as shown in FIG. 4A.

The display device includes an "area setting" menu on the OSD (On Screen Display) 210, and then a user starts a button on the report controller or the display device 400 to define a specific area. And the end point of the lower right end (or the start point of the lower left end and the end point of the upper right) may be input to determine the image source region 220.

The second method is to use program information on a PC as shown in FIG. 4B.

In order to play an image source on a PC, a specific program is used. As a result, a window 230 having a predetermined position and size is displayed on the screen. In this case, the image source area 240 may be automatically determined by executing an application program for obtaining information about the size and position of the window and transmitting the information to the display device through a separate control signal generator 500.

In addition, the color control information input unit 320 may receive the color control information as in the image source region extraction unit 310, and may be directly received from a user or received from a PC using a specific program. .

That is, when receiving a user's input directly through the "color adjustment menu for the setting area" provided on the OSD (210) on the display device, as shown in Figure 4a, the user can remote control or display device 400 Use the buttons on the to enter the type and degree of color adjustment.

In addition, when receiving the color control information from the PC, as shown in Figure 4b, the user uses a specific program that can edit, store and recall the color control information on the PC. In this case, as described in the image source region extraction unit 310, the information of the program is transmitted to the display apparatus through a separate control signal generator 500.

The types of color control items that can be adjusted through this method are defined as brightness, gradation, hue, saturation, etc., and the degree of control for each item is limited to a value within a certain range.

In addition, the signal resynthesis unit synthesizes a signal except the designated region of the image source region extraction unit 310 with the result signal of the color control unit 330 from the original signal of the input PC signal to resynthesize the final signal. It is then sent to the signal processing board of the display device.

In this way, regardless of the type of signal input to the display device, the viewer can make a special effect on a specific area on the screen.

For example, by adjusting the brightness to be forcibly increased for a specific area, an effect (highlight) of the area is emphasized on the screen, and the color adjustment unit 330 converts the specific area into YUV. Effects such as inversion of the signal or removal of the chroma signal (UV signal) can be seen as a black and white signal.

In order to implement the above-described embodiments in an actual physical form, an image source region extraction unit 310, a color adjustment information input unit 320, and a color adjustment execution unit 330 are configured using a field programmable gate array (FPGA). The signal resynthesis unit 340 may be implemented.

In this case, the image source region extraction unit 310 and the color control information input unit 320 require user input information (or program information from a PC), and thus the data processing unit 100 (or PC) and data on the display device. Implement a separate communication unit inside the FPGA to send and receive data.

As described above, when the present invention is implemented using an FPGA, the present invention may be simply implemented as a single chip, and the function of the color control unit 330 may be added and edited as necessary, which is very useful.

The display device according to the present invention as described above has the following advantages.

First, when displaying a PC signal including an image source on the screen, by enabling a separate color control for the image source region, there is an effect that can implement a natural image quality for the image source region.

Second, by providing independent color control means for a specific area of the screen, there is an effect that can produce a special effect intended by the user.

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.

1 is a diagram illustrating a signal processor on a display device according to the related art.

2 is a diagram illustrating a signal processor on a display device according to the present invention.

3 is a view illustrating in detail an image source color controller in a signal processor on a display device according to the present invention;

4A and 4B illustrate a method of setting an image source region in a display device according to the present invention.

* Explanation of symbols for main parts of the drawings

100: signal processing unit 110: A / D converter

120: TMDS receiver 130: MUX

140: Format Converter 150: Video Decoder

160: I / P conversion unit 200: panel

210: OSD (On Screen Display) 220: Video source area

230: window 240: image source area

300: image source color control unit 310: image source area extraction unit

320: color adjustment information input unit 330: color adjustment execution unit

332: color space conversion unit 334: color control unit

336: color space inverse transform unit 340: signal resynthesis unit

Claims (4)

In the PC signal conversion device for converting a PC signal of the RGB format output from the PC into a signal suitable for a television receiver, An A / D converter that converts the input analog PC signal to digital and outputs it; Transmission Minimized Differential Signaling (TMDS) receiver which converts input digital PC signal into horizontal / vertical synchronization signal and digital video signal by signal conversion method and outputs it; A MUX selectively output among signals output from the A / D converter and a TMDS receiver; An image source color control unit which performs color adjustment to the RGB signal suitable for the TV receiver with respect to the image source region designated by the user through the signal output from the MUX or through program information on a PC; A format converter for vertically / horizontally scaling digital image data output from the image source color controller; And a panel configured to display the screen by restoring and driving the output signal output from the format converter. According to claim 1, wherein the image source color control unit An image source region extraction unit for discriminating an image source region according to a user input or program information on a PC from a PC signal, A color adjustment information input unit configured to receive a type and a degree of color adjustment for the specific region identified by the image source region extraction unit from a user; A color adjustment unit for performing color adjustment by actually applying color adjustment information of an image source area on a PC signal according to the information received from the color adjustment information input unit; And a signal resynthesizing unit for synthesizing the signals of the remaining portions of the image source region extracting unit other than the image source region and the result signal of the color adjusting unit and finally resynthesizing the PC signal. . The method of claim 2, wherein the color adjustment unit A color space conversion unit for converting a signal of the area determined by the image source area extraction unit from a RGB format to a YUV format according to a color space conversion formula; A color controller which generates a signal subjected to color adjustment by transforming the signal converted into the YUV format by the color space converter according to the information obtained by the color control information input unit; And a color space inverse converter configured to inversely convert the YUV signal, which has been color-adjusted in the color controller, back to an RGB signal. The method of claim 1, The image source color control unit is a display device, characterized in that it includes a brightness, gradation, gamma, hue, saturation and sharpness as a color-related element that can adjust the signal.