KR20100047741A - Apparatus for adjust signal of display device - Google Patents

Abstract

PURPOSE: An apparatus for adjusting a screen of a video device is provided to automatically set or update an input video adjusting value according to a difference of an output video adjusting value in a video device supporting reproduction for video sources of various signal modes, thereby shortening work time for screen adjustment. CONSTITUTION: An analog screen adjustor(110) adjusts and outputs an analog video signal according to a set analog output video adjusting value. An ADC(Analog-Digital Converter)(121) converts the analog video signal into a digital signal and outputs it. A controller(141) reflects the difference between analog and digital output video adjustment values to determine a feedback adjusting value for adjusting an input video signal. An input video adjusting value setting unit(151) sets or updates the analog input video adjustment value according to the feedback adjusting value.

Description

Screen control device of video equipment {APPARATUS FOR ADJUST SIGNAL OF DISPLAY DEVICE}

The present invention relates to an apparatus for adjusting a screen of an image device, and more particularly, to automatically set an input image adjustment value according to a deviation of an output image adjustment value in an image device that supports reproduction of image sources of various signal types. An apparatus for adjusting a screen of a video device to be updated.

As is well known, recent image apparatuses have a plurality of external input terminals for reproducing image sources of various signal types. For example, the digital TV may reproduce an image signal having various signal methods such as composite, component, D-SUB, digital visual interface (DVI), and high definition multimedia interface (HDMI).

In such a video device, an analog video signal is digitally processed and provided to an image processing unit for reproduction. For this purpose, a digital processing of an analog video signal should always output the same digital value for a certain level of input. An apparatus for adjusting a screen of an imaging apparatus for this purpose is illustrated in FIG. 1.

1 is a block diagram illustrating an apparatus for adjusting a screen of a video apparatus according to the prior art.

According to the conventional screen adjustment apparatus as described above, the video signal Y / C input to the composite input terminal 10 is converted into component video signals Y, Pb, and Pr by the third screen adjustment unit 50, and is preset. The screen is adjusted according to the image adjustment value, the screen is adjusted according to the preset image adjustment value by being converted into an analog RGB image signal by the first screen adjustment unit 60, and the second screen adjustment unit 70 is converted into a digital RGB image signal. The screen is adjusted according to the preset video adjustment value.

In addition, the image signal input to the component input terminal 20 is screen-adjusted according to a preset image adjustment value by the third screen controller 50, and is converted into an analog RGB image signal by the first screen controller 60 to be preset. The screen is adjusted according to the image adjustment value, and the screen is adjusted according to the preset image adjustment value while being converted into a digital RGB image signal by the second screen adjustment unit 70.

In addition, the image signal input to the analog RGB input terminal 30 is screen adjusted according to the preset image adjustment value by the first screen adjustment unit 60, and is converted into a digital RGB image signal by the second screen adjustment unit 70 The screen is adjusted according to the preset image adjustment value.

Thus, the digital RGB image signal finally output from the second screen adjustment unit 70 is reproduced by the image processing unit 80.

However, due to the characteristic of the IC single product internally, there is a slight error with respect to the same input, and in order to minimize the error, a process of setting an image adjustment value for adjusting the screen of the image signal is required before shipment of the product.

To this end, the operator measures the characteristics of each video signal output by the third screen adjusting unit 50, the first screen adjusting unit 60, and the second screen adjusting unit 70, and based on the measurement result, the correct image The adjustment value is calculated and input to the image adjustment value setting unit 90. Then, the image adjustment value setting unit 90 sets or updates the image adjustment values of the third screen adjustment unit 50, the first screen adjustment unit 60, and the second screen adjustment unit 70 based on the input image adjustment value. .

As described above, the apparatus for adjusting a screen of a video apparatus according to the prior art relies on a measurement result by an operator, and an image adjustment value, which is a reference in converting a signal method of an image signal, is input only when an image adjustment value is input by an operator. Could be set or updated.

Therefore, the high dependence on the operator, even a skilled worker can not perform the screen adjustment correctly every time, it was not possible to ensure the complete reliability of the screen adjustment, the excessive time required for the screen adjustment there was.

The present invention has been proposed to solve such a problem of the prior art, and automatically sets or updates an input image adjustment value according to a deviation of an output image adjustment value in an image device that supports reproduction of various signal type image sources. It provides a screen adjusting device of the video device.

When the analog video signal of the analog video signal and the digital video signal of the same video source is output from the video device, the screen adjustment apparatus of the video device according to the present invention adjusts the analog video signal according to a preset analog output video adjustment value. An analog screen controller for outputting, an analog / digital converter for converting the analog video signal output from the analog screen controller into a digital signal, and outputting the digital video signal when the digital video signal is output from the video apparatus. A digital screen adjustment unit for adjusting and outputting a screen according to a set digital output image adjustment value, and comparing the digital image signal output from the digital screen adjustment unit with an output signal of the analog / digital conversion unit and comparing the analog output image adjustment value with the digital display unit. An output image deviation measuring unit for calculating a deviation of the output image adjustment value, a control unit for determining a feedback adjustment value for screen adjustment of an input image signal by reflecting the deviation calculated by the output image deviation measuring unit, and the image And an input image adjustment value setting unit for setting or updating an analog input image adjustment value for screen adjustment of an analog image signal input to the device according to the feedback adjustment value.

The digital screen adjustment unit adjusts the digital RGB video signal according to the digital output video adjustment value when the digital RGB video signal is output from the video device as the digital video signal.

The analog screen adjustment unit may include a first analog screen adjustment unit that adjusts the analog RGB image signal according to the analog output image adjustment value when the analog RGB image signal is output from the video device as the analog image signal.

The analog screen adjusting unit may include: a second analog screen adjusting unit for adjusting the component video signal according to the analog output image adjusting value when the component video signal is output as the analog video signal from the video device; and the second analog screen adjusting unit. And a first analog screen adjustment unit configured to convert the component video signal output from the analog video signal into an analog RGB video signal, and to adjust the converted analog RGB video signal according to the analog output video adjustment value.

The second analog screen adjustment unit converts the composite video signal into a component video signal when the composite video signal is output as the analog video signal from the video device, and adjusts the converted component video signal according to the analog output video adjustment value. do.

The analog input image adjustment value includes at least one of an offset and a gain.

According to the present invention, by automatically setting or updating the input image adjustment value according to the deviation of the output image adjustment value in an image device supporting reproduction of various signal sources, unlike the prior art, it is not dependent on an operator. Complete reliability of screen adjustment can be secured, and work time for screen adjustment can be shortened.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In the present invention, although the image adjustment value for screen adjustment of the input image and the image adjustment value for screen adjustment of the output image are separately set in the image device, the image device needs to update the output image adjustment value due to environmental factors. When the input image is also affected by the same environmental factors, the output image adjustment value is fed back to the input image adjustment value to bring the screen adjustment effect of the input image.

2 is a block diagram illustrating an apparatus for adjusting a screen of a video device according to the present invention.

As described above, the screen adjusting apparatus according to the present invention includes an analog output unit 100 including a composite output unit 101, a component output unit 103, and an analog RGB output unit 105 to which analog video signals are output; In comparison with the analog video signal output from the analog output unit 100, the digital output unit 161 outputs the digital RGB video signal of the same video source and the analog video signal output from the analog output unit 100. An analog screen adjusting unit 110 for adjusting and outputting the screen according to the analog output image adjusting value, an analog / digital converting unit 121 for converting and outputting an analog video signal output from the analog screen adjusting unit 110 into a digital signal; The digital RGB image signal output from the digital output unit 161 is adjusted according to the preset digital output image adjustment value and outputted. The digital screen adjustment unit 163 compares the digital RGB image signal output from the digital screen adjustment unit 163 with the output signal of the analog / digital converter 121 to determine the deviation between the analog output image adjustment value and the digital output image adjustment value. A control unit 141 for determining a feedback adjustment value for screen adjustment of an input image signal by reflecting the deviation calculated by the output image deviation measuring unit 123, the output image deviation measuring unit 123, and an image device And an input image adjustment value setting unit 151 for setting or updating the analog input image adjustment value for screen adjustment of the analog image signal input to the feedback adjustment value.

The analog screen controller 110 includes a first analog screen controller 113 and a second analog screen controller 111.

The first analog screen controller 113 converts the component video signal output from the second analog screen controller 111 into an analog RGB video signal and adjusts the screen according to the preset analog output video adjustment value. Alternatively, the screen adjusts the analog RGB image signal output from the analog RGB output unit 105 according to a preset analog output image adjustment value.

The second analog screen adjusting unit 111 converts the composite video signal output from the composite output unit 101 into a component video signal, and adjusts the screen of the converted component video signal according to a preset analog output video adjustment value or the component output unit ( The component video signal output from 103 is adjusted according to the preset analog output video adjustment value.

Reference numeral 131 in the drawing denotes an image reproducing unit which outputs an image signal of the same image source through the analog output unit 100 and the digital output unit 161 under the control of the controller 141.

The process of setting the input image adjustment value by the screen adjustment apparatus of the video device according to the present invention configured as described above will be described as follows.

As a precondition for the implementation of the present invention, video signals of the same image source are output to the composite output unit 101, the component output unit 103, the analog RGB output unit 105, and the digital output unit 161. Here, the composite output unit 101 and the component output unit 101 may not be output to the composite output unit 101, the component output unit 103, the analog RGB output unit 105, and the digital output unit 161 at the same time. When an image signal is output through either the output unit 103 or the analog RGB output unit 105 or the digital output unit 161, the input image adjustment value may be set according to the feedback adjustment value caused by the output image deviation.

First, when an image signal of the same image source is output to the digital output unit 161 and the analog RGB output unit 105, the first analog screen adjustment unit 113 outputs the analog RGB image signal output from the analog RGB output unit 105. The screen is adjusted according to the preset analog output image adjustment value, and the analog / digital converter 121 converts the analog RGB image signal output from the first analog screen controller 113 into a digital signal and outputs the digital signal.

The digital screen adjusting unit 163 adjusts and outputs a digital RGB image signal output from the digital output unit 161 according to a preset digital output image adjustment value, and the output image deviation measuring unit 123 is a digital screen adjusting unit. Comparing the digital RGB image signal output from the 163 and the output signal of the analog / digital converter 121 to calculate the deviation of the analog output image adjustment value and the digital output image adjustment value, that is, the offset or gain deviation, 141).

The controller 141 determines the feedback adjustment value for screen adjustment of the input image signal by reflecting the deviation calculated by the output image deviation measuring unit 123. Here, the determining of the feedback adjustment value for the input image from the output image means that the image adjustment value for adjusting the screen of the input image and the image adjustment value for adjusting the screen of the output image are separately set in the imaging apparatus. When the output image adjustment value needs to be updated due to a factor or the like, the input image is also affected by the same environmental factors. Therefore, the output image adjustment value is fed back to the input image adjustment value to improve the screen adjustment effect of the input image. Because you can.

Lastly, the input image adjustment value setting unit 151, which is responsible for setting or updating the input image adjustment value for screen adjustment of the input image signal in the video device, determines the input image according to the feedback adjustment value determined by the controller 141. Set or update an adjustment value, such as an offset or a gain.

On the other hand, when a video signal of the same image source is output from the digital output unit 161 and the component output unit 103 or a video signal of the same image source is output from the digital output unit 161 and the composite output unit 101, the second signal is output. The analog screen adjusting unit 111 converts the composite video signal output from the composite output unit 101 into a component video signal, and preset analog output of the converted component video signal or the component video signal output from the component output unit 103. The screen is adjusted and output according to the video adjustment value. In addition, the first analog screen controller 113 converts the video signal output from the second analog screen controller 111 into an analog RGB video signal and outputs the analog signal.

Then, the analog / digital converter 121 converts the analog RGB image signal output from the first analog screen controller 113 into a digital signal and outputs the digital signal.

The output image deviation measuring unit 123 compares the digital RGB image signal output from the digital screen adjusting unit 163 and the output signal of the analog / digital converting unit 121 to adjust the analog output image adjustment value and the digital output image adjustment value. Is calculated and provided to the control unit 141.

The controller 141 determines the feedback adjustment value for screen adjustment of the input image signal by reflecting the deviation calculated by the output image deviation measuring unit 123.

Lastly, the input image adjustment value setting unit 151, which is responsible for setting or updating the input image adjustment value for screen adjustment of the input image signal in the video device, determines the input image according to the feedback adjustment value determined by the controller 141. Set or update an adjustment value, such as an offset or a gain.

So far, the present invention has been described with reference to the preferred embodiments. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

1 is a block diagram showing a screen adjustment apparatus of a video apparatus according to the prior art;

2 is a block diagram showing a screen adjustment apparatus of a video device according to the present invention.

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

100: analog output unit 101: composite output unit

103: component output unit 105: analog RGB output unit

110: analog screen adjustment unit 111: second analog screen adjustment unit

113: first analog screen adjustment unit 121: analog / digital conversion unit

123: an output image deviation measuring unit 131: an image reproducing unit

141: control unit 151: input image adjustment value setting unit

161: digital output unit 163: digital screen adjustment unit

Claims (6)

An analog screen adjustment unit for outputting the analog video signal by adjusting the screen according to a preset analog output video adjustment value when an analog video signal among analog video signals and digital video signals of the same video source is output from a video device; An analog / digital converter converting the analog video signal output from the analog screen controller into a digital signal and outputting the digital signal; A digital screen adjustment unit for outputting the digital video signal by adjusting the screen according to a preset digital output video adjustment value when the digital video signal is output from the video device; An output image deviation measuring unit configured to calculate a deviation between the analog output image adjustment value and the digital output image adjustment value by comparing the digital image signal output from the digital screen adjustment unit with an output signal of the analog / digital conversion unit; A control unit for determining a feedback adjustment value for screen adjustment of an input image signal by reflecting the deviation calculated by the output image deviation measuring unit; An input image adjustment value setting unit which sets or updates an analog input image adjustment value for screen adjustment of an analog image signal input to the image device according to the feedback adjustment value Screen adjustment apparatus of a video device comprising a. The method of claim 1, The digital screen adjustment unit adjusts the digital RGB video signal according to the digital output video adjustment value when the digital RGB video signal is output as the digital video signal from the video device. Screen control device of video equipment. The method of claim 1, The analog screen adjustment unit, if the analog RGB image signal is output from the video device as the analog image signal, the first analog screen adjustment unit for adjusting the analog RGB image signal according to the analog output image adjustment value Screen adjustment apparatus of a video device comprising a. The method of claim 1, The analog screen adjustment unit, A second analog screen adjustment unit for screen-adjusting the component video signal according to the analog output video adjustment value when the component video signal is output as the analog video signal from the video device; A first analog screen controller which converts the component video signal output from the second analog screen controller into an analog RGB video signal and adjusts the converted analog RGB video signal according to the analog output video adjustment value Screen adjustment apparatus of a video device comprising a. The method of claim 4, wherein The second analog screen adjustment unit converts the composite video signal into a component video signal when the composite video signal is output as the analog video signal from the video device, and adjusts the converted component video signal according to the analog output video adjustment value. doing Screen control device of video equipment. The method according to any one of claims 1 to 5, The analog input image adjustment value includes at least one of offset and gain. Screen control device of video equipment.

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