KR101635218B1 - Method for adjusting image quality - Google Patents

Abstract

The present invention relates to a method of adjusting image quality in an image display device, the image quality adjusting method comprising: selecting one of a plurality of image quality adjusting methods; And performing image quality adjustment according to an image quality adjustment method selected for at least a part of the plurality of image quality adjustment items, wherein the first image quality adjustment method among the plurality of image quality adjustment methods includes displaying a first pattern and a second pattern on a display ; Receiving an adjustment value; And changing a state in which the first pattern is displayed according to the input adjustment value.

Description

{Method for adjusting image quality}

The present invention relates to a method of adjusting image quality of an image display apparatus.

A television, which is a type of video display device, receives a broadcast signal from a broadcast station, displays an image, and outputs audio corresponding to the broadcast signal. Also, the television is connected to an external device such as a DVD player, a set-top box, a computer, and the like to display various images.

That is, the television receives the video signal and the audio signal from the external device, and outputs the video and audio corresponding thereto. In general, the television and the external device each have a function of changing the image quality information by the user's operation and adjusting the image quality. At this time, the image quality information includes information on the brightness, contrast ratio, sharpness and color of the image signal.

The video display device provides a user interface that can change the brightness, contrast ratio, sharpness, color, and the like so that the user can change the image quality of the current image.

The present invention provides a user interface that enables a user to easily adjust the image quality of an image display device and also provides a method for allowing a user to easily adjust the image quality using a plurality of patterns and an image display device using the same .

An image quality adjustment method according to an embodiment of the present invention includes: selecting one of a plurality of image quality adjustment methods; And performing image quality adjustment on at least a part of the plurality of image quality adjustment items according to the selected image quality adjustment method, wherein the first image quality adjustment method among the plurality of image quality adjustment methods includes a first pattern and a second pattern Lt; / RTI > Receiving an adjustment value; And changing a state in which the first pattern is displayed according to the input adjustment value.

A display device according to an embodiment of the present invention performs the image quality adjustment method.

 In addition, the image quality adjusting method may be implemented by a computer-readable recording medium manufactured as a program to be executed by a computer.

According to the embodiment of the present invention, since the user performs the image quality adjustment using a state in which a plurality of patterns are displayed on the screen, the image quality of the image visually displayed to the user can be set to the standard image quality.

In addition, even when the user changes the image quality by operating various existing menus, it is possible to set the standardized image quality by performing the image quality setting process of several stages, which is also effective from the UI side of the user.

Therefore, it is not necessary to check whether the standard image quality data is inputted from the external device and whether the standard image quality data is set to the standard image quality or the expert uses the filter for the specific color to check the color density, tint, and the like. .

In addition, by selecting the image quality adjusting method for the user, not only the standard image quality but also the image quality preferred by the user can be set.

1 is a flowchart showing an image quality adjusting method according to the first embodiment of the present invention.
2 is a flowchart showing an image quality adjusting method according to the second embodiment of the present invention.
3 is a flowchart showing an embodiment of a first image quality adjusting method.
4 is a block diagram showing a configuration of a video display device according to an embodiment of the present invention.
5 is a block diagram showing an embodiment of the configuration of the signal processing unit shown in FIG.
6 to 8 are views showing embodiments of a user interface provided to a user for image quality adjustment.
9 is a diagram illustrating an embodiment of a user interface (UI) provided to a user for selecting an image quality adjustment method.
10 to 12 are diagrams for explaining an embodiment of a method of adjusting the brightness of an image display apparatus.
13 to 15 are views for explaining an embodiment of a method of adjusting contrast of an image display apparatus.
16 and 17 are diagrams for explaining an embodiment of a method of adjusting a tint of an image display apparatus.
FIGS. 18 and 19 are diagrams for explaining an embodiment of a method of adjusting the color depth of an image display apparatus according to a standard image quality adjusting method.
20 and 21 are views for explaining an embodiment of a method of adjusting the horizontal sharpness of the image display apparatus according to the standard image quality adjusting method.
22 is a view for explaining an embodiment of a method of adjusting vertical sharpness of an image display apparatus according to a standard image quality adjusting method.
FIG. 23 is a view for explaining an embodiment of a method of adjusting the color density of an image display device according to a preferred image quality adjusting method.
24 is a diagram for explaining an embodiment of a method of adjusting the horizontal sharpness of the image display apparatus according to the preferred image quality adjustment method.
25 is a diagram for explaining an embodiment of a method of adjusting the vertical sharpness of the image display apparatus according to the preferred image quality adjusting method.
26 is a diagram for explaining an embodiment of a method of adjusting dynamic contrast of an image display apparatus according to a preferred image quality adjusting method.
27 is a view for explaining an embodiment of a method of adjusting a color temperature of a video display device according to a preferred image quality adjusting method.
28 is a view for explaining an embodiment of a method of adjusting the backlight brightness of an image display apparatus.
FIG. 29 shows an embodiment of a user interface for receiving an external input from the user to apply the image quality adjustment value.

Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. It should be understood, however, that the scope of the inventive concept of the present embodiment can be determined from the matters disclosed in the present embodiment, and the spirit of the present invention possessed by the present embodiment is not limited to the embodiments in which addition, Variations.

In the following description, the word " comprising " does not exclude the presence of other elements or steps than those listed.

FIG. 1 is a flowchart illustrating an image quality adjusting method according to an embodiment of the present invention.

Referring to FIG. 1, the image display apparatus selects an image quality adjustment method from a user (operation 100).

That is, the image display apparatus may have a plurality of image quality adjustment methods for adjusting the image quality of the display image, and may be provided with a user interface (UI) provided for performing each of the plurality of image quality adjustment methods Information may be stored.

The user can select any one of the plurality of image quality adjusting methods, and the image quality adjustment of the image display device can be performed according to the image quality adjustment method selected by the user.

Meanwhile, an image display apparatus according to an embodiment of the present invention may include a plurality of image quality adjustment items such as brightness, contrast, color, tint, sharpness, Brightness, contrast, dynamic contrast, color temperature or backlight brightness can be adjusted according to the user's input.

When the image quality adjustment method is selected as described above, the image display device performs image quality adjustment according to the selected image quality adjustment method for at least a part of the plurality of image quality adjustment items (step 110).

That is, the image quality adjustment may be performed according to the selected image quality adjustment method for all of the plurality of adjustable image quality adjustment items. Alternatively, image quality adjustment may be performed according to a predetermined image quality adjustment method, which is not related to the selected image quality adjustment method, with respect to the image quality adjustment items of some of the plurality of image quality adjustment items, The image quality adjustment can be performed according to the adjustment method.

According to the embodiment of the present invention, the number of the user-selectable image quality adjusting methods or the number of the user-adjustable plurality of image quality adjusting items and the like can be changed as needed.

Hereinafter, an image quality adjusting method and a video display device according to an embodiment of the present invention will be described in detail with reference to a case where a user selects one of the first image quality adjusting method and the second image quality adjusting method to perform image quality adjustment .

According to an embodiment of the present invention, the user can select any one of the first image quality adjusting method and the second image quality adjusting method to be used for adjusting the image quality of the image display apparatus.

The first image quality adjusting method and the second image quality adjusting method may be different from each other in the criteria for setting the image quality adjustment value, and the user interfaces (UI) displayed on the screen for image quality adjustment may be different from each other.

For example, the first image quality adjustment method may be a standard image quality adjustment method, and the input image can be displayed in standard image quality by the image quality adjustment according to the standard image quality adjustment method.

The standard image quality refers to an image quality of an image display device capable of displaying an input image signal as it is. The image quality of the image source itself, for example, brightness, contrast, color density, Tint, sharpness and overall brightness of the screen.

The first image quality adjustment method may be a preference image quality adjustment method, and the image quality adjustment according to the preference image quality adjustment method may display an input image with a desired image quality.

As described above, by allowing the user to select the image quality adjustment method by any one of the first and second image quality adjustment methods, for example, the standard image quality adjustment method and the preferred image quality adjustment method, the image of the image quality adaptable to the individual user's tendency can be displayed can do.

FIG. 2 is a flowchart showing an embodiment of a method of adjusting image quality of an image display device according to an image quality adjustment method selected by a user.

Referring to FIG. 2, the image display apparatus performs image quality adjustment for a first group among a plurality of image quality adjustment items according to the first image quality adjustment method (operation 111).

That is, a plurality of image quality adjustment items capable of image quality adjustment can be divided into a first group and a second group, and the image quality adjustment items belonging to the first group can be divided into the first group and the second group in common regardless of the image quality adjustment method selected by the user The image quality can be adjusted according to the image quality adjustment method.

For example, the brightness, contrast, tint, and backlight brightness of the plurality of image quality adjustment methods may belong to the first group, and thus the brightness, contrast, And the backlight brightness may be sequentially adjusted in accordance with the first image quality adjustment method irrespective of the image quality adjustment method selected by the user.

After the image quality adjustment is performed on the image quality adjustment items of the first group, the image display device confirms the image quality adjustment method selected by the user (operation 112).

When the user selects the first image quality adjustment method, the image display device performs image quality adjustment on the second group of the plurality of image quality adjustment items according to the first image quality adjustment method (operation 113).

On the other hand, if the user selects the second image quality adjustment method, the image display device performs image quality adjustment on the image quality items belonging to the second group according to the second image quality adjustment method (operation 114).

That is, the image quality adjustment items belonging to the second group among the plurality of image quality adjustment items capable of image quality adjustment can be adjusted in accordance with the image quality adjustment method selected by the user.

For example, the color and sharpness among the plurality of image quality adjusting methods may belong to the second group, and accordingly, the color density and the sharpness may be adjusted according to the image quality adjusting method selected by the user The image quality can be adjusted sequentially.

In addition, the second image quality adjustment method may include performing image quality adjustment on at least one image quality item that is not adjusted according to the first image quality adjustment method, for example, dynamic contrast and color tmperatue .

FIG. 3 is a flowchart showing an embodiment of the first image quality adjusting method, and shows a method of setting a video image display apparatus to a standard image quality.

Referring to FIG. 3, the image processing apparatus displays the first pattern and the second pattern (operation 121).

For example, the display module may be a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescent display (ELD), or the like. ), A VFD (Vacuum Fluorescent Display), and the like.

For example, the image processing apparatus can display an image signal input from the outside on the screen using the display module, and when the image quality is adjusted, a screen for image quality adjustment including the first pattern and the second pattern is displayed can do.

More specifically, the first and second patterns may be simultaneously displayed on the display screen, for example, vertically or horizontally adjacent to each other.

Meanwhile, the first and second patterns may be internal patterns of the image display device, that is, they may be stored in a memory provided in the image display device. However, the present invention is not limited to this. For example, at least one of the first and second patterns may be input from an external pattern generating apparatus.

The image display apparatus receives an adjustment value for image quality adjustment from the user (step 122).

The input adjustment value may be a value for adjusting image quality characteristics corresponding to any one of a plurality of image quality items. For example, the adjustment value may be a brightness, a contrast, and the like, which are image quality items adjustable in the image display device according to an embodiment of the present invention. , Color intensity, tint, sharpness, and backlight brightness.

The image display apparatus changes the display state of the first pattern according to the input adjustment value (step 123).

Meanwhile, according to the embodiment of the present invention, the display state of the second pattern is not changed according to the adjustment value, and can be displayed in a fixed state on the display screen.

The first and second patterns represent image data stored in a memory inside the image display device before the image processing for display is performed, for example, the state in which the pattern is displayed is displayed on the screen for image quality adjustment, , ≪ / RTI > two patterns may be displayed and visually recognized by the user.

For example, the first pattern may be image-processed according to the adjustment value input by the user, and the state of being displayed on the screen may be changed by changing the adjustment value. More specifically, The brightness, contrast, color density, tint, sharpness, or backlight brightness of one pattern may be changed.

That is, the change of the display state of the first pattern means that the image quality of the first pattern visually recognized by the user is displayed on the screen, more specifically, the image quality characteristic corresponding to the specific image quality item to be adjusted is changed can do.

For example, in the case of adjusting the brightness, which is one of a plurality of image quality items, the brightness of a first region displayed on the screen or a specific region included in the first pattern may be changed according to the input adjustment value have.

In addition, for each of the plurality of image quality items, the first pattern displayed at the time of image quality adjustment may be different.

That is, the brightness, contrast, color density, tint, sharpness, backlight brightness, shape, or size of the first pattern displayed when the image quality is adjusted may be different for each of the plurality of image quality items.

The first pattern displayed when adjusting the image quality of the first item among the plurality of image quality items and the first pattern displayed when the image quality of the second item is adjusted may be different from each other in the image quality corresponding to the first item.

For example, the first pattern displayed when the brightness is adjusted and the first pattern displayed when the contrast is adjusted may be different from each other.

The first pattern displayed when the image quality of the first item is adjusted and the first pattern displayed when the image quality of the second item is adjusted may be the same as those of the third item among the plurality of image quality items have.

For example, the first pattern displayed when the brightness is adjusted and the first pattern displayed when the contrast is adjusted may have the same color displayed on the screen.

Meanwhile, the display state of the second pattern may be fixed without changing according to the input adjustment value, and the second pattern may not be subjected to an image processing process performed according to the input adjustment value. That is, the brightness, contrast, color density, tint, sharpness, or backlight brightness of the second pattern displayed on the screen and visually recognized by the user can be kept constant regardless of the input adjustment value.

The second pattern may be an image quality adjustment target according to the present invention, for example, such that the display state of the first pattern coincides with the display state of the second pattern.

That is, according to the embodiment of the present invention, the display state of the first pattern, which changes according to the input adjustment value, is made to coincide with the display state of the second pattern, The image quality of the apparatus can be adjusted.

For this purpose, the second pattern may include an image generated so as to have a standard image quality. As described above, the image of the second pattern is fixed without being changed according to the input adjustment value so as to be a reference for image quality adjustment .

The standard image quality refers to an image quality of an image display device capable of displaying an input image signal as it is. The image quality of the image source itself, for example, brightness, contrast, color density, Tint, sharpness and overall brightness of the screen.

The second pattern may be generated so as to have the standard image quality as described above and then stored in a memory inside the image display device. In order to fix the display state unlike the first pattern, which is changed according to the adjustment value, The pattern 210 may be displayed after being subjected to a different image processing process.

The standard image quality of the second pattern may be set differently depending on the manufacturer of the image display apparatus, the region to be used, and the like.

Also, for each of the plurality of image quality items that can be adjusted, the second pattern displayed upon image quality adjustment may be different.

That is, the brightness, contrast, color density, tint, sharpness, backlight brightness or shape of the second pattern displayed when the image quality is adjusted may be different for each of the plurality of image quality items.

The second pattern displayed when the image quality of the first item of the plurality of image quality items is adjusted and the second pattern displayed when the image quality of the second item is adjusted may be different from each other in the state of image quality corresponding to the first item.

For example, the second pattern displayed when the brightness is adjusted and the second pattern displayed when the contrast is adjusted may have different brightness states.

The second pattern displayed when the image quality of the first item is adjusted and the second pattern displayed when the image quality of the second item is adjusted may be the same as those of the third item among the plurality of image quality items have.

For example, the second pattern displayed when the brightness is adjusted and the second pattern displayed when the contrast is adjusted may have the same color displayed on the screen.

Thereafter, the image display apparatus confirms whether the state in which the first pattern is displayed matches the display state of the second pattern (operation 124).

According to the embodiment of the present invention, it is preferable that the first and second patterns are displayed on the display screen and the user judges whether or not the display states of the first and second patterns are visually matched.

Therefore, the display states of the first and second patterns are coincident with each other. That is, not only when the first and second patterns are displayed on the screen objectively, for example, The first and second patterns are displayed on the screen and visually recognized by the user are coincident with each other.

That is, the embodiment of the present invention provides the image quality adjustment method adaptable to the user by matching the first pattern with the second pattern of the standard image quality when viewed from the user's viewpoint, The judgment as to when the display states coincide may be different from each other.

Accordingly, the video display apparatus according to the embodiment of the present invention allows the user to visually judge whether or not the display states of the first and second patterns are coincident with each other, If it is determined that the display states of the first and second patterns match, the adjustment value can be set.

For this purpose, the video display device displays the phrase "Set the adjustment value so that the display state of the first pattern matches the display state of the second pattern" on the screen for image quality adjustment, , It is possible to induce to set the adjustment value at the time when the display states of the two patterns are visually matched.

If the display states of the first and second patterns do not match as a result of the checking in step 124, the image display apparatus repeats steps 122 and 123 until the display states of the first and second patterns match.

If the display states of the first and second patterns match, the image display device sets the input adjustment value (operation 125).

That is, when the user judges that the display states of the first and second patterns are visually matched and performs an input corresponding thereto, the image display apparatus sets the adjustment value to the first value inputted at the corresponding time point, Can be performed.

Meanwhile, the second image quality adjustment method may be a preference image quality adjustment method, and the preference image quality adjustment method may set the adjustment value directly input by the user, Can be set.

FIG. 4 is a block diagram illustrating a configuration of an image display apparatus according to an exemplary embodiment of the present invention. The image display apparatus may include a memory 150, a signal processing unit 160, and a display unit 170.

Referring to FIG. 4, the memory 150 stores a first pattern and a second pattern for performing the first image quality correction method. According to another embodiment of the present invention, either the first pattern or the second pattern is not stored in the memory 150 but may be input from the outside. For example, memory 150 may be Flash ROM or non-volatile memory.

In addition, the first pattern and the second pattern may be generated as video signals having different formats and stored in the memory 150. For example, the first pattern may be a predetermined image encoding method, And the second pattern 220 may be an uncompressed R, G, B image signal.

The signal processing unit 160 processes and outputs the first pattern according to the input adjustment value, and the image display apparatus may include a user input unit (not shown) for receiving the adjustment value from the user. For example, the user input unit (not shown) may be a plurality of input buttons provided on the image display apparatus or an external remote controller.

The display unit 170 displays the input first pattern and the second pattern on the screen.

Meanwhile, the first pattern and the second pattern may be subjected to different image processing processes before being displayed on the display unit 170.

For example, the second pattern stored in the memory 150 may be input to the display unit 170 without passing through the signal processing unit 160, so that the second pattern is displayed on the display unit 170 The image quality of the image signal stored in the memory 150, for example, the standard image quality can be displayed as it is without being affected by the adjustment value input as described above.

That is, the first pattern is displayed on the display unit 170 according to the input adjustment value through the signal processing unit 160 that performs image processing according to the input adjustment value and changes image quality, The state of the second pattern displayed on the display unit 170 by bypassing the signal processing unit 170 may not be changed by the input adjustment value.

In addition, although various types of image receiving units for receiving video signals from outside are not shown in FIG. 4, the video display device may be a CVBS (Composite Video Baseband Signal), an S-Video, a Component, a PC- Video / visual Interactive), and HDMI (High-Definition Multimedia Interface).

4, the second pattern 220 stored in the memory 150 is directly input to the display unit 170 without being subjected to a separate process. Alternatively, the second pattern 220 stored in the memory 150 may be And may be input to the display unit 170 after a predetermined process.

However, the processing performed on the second pattern is performed irrespective of the input adjustment value, and the second pattern bypasses a block that performs image processing according to the adjustment value. In this case, It is preferable that the display state of the pattern does not change according to the adjustment value.

In addition, the display unit 170 may include a display module including various display-type display panels such as LCD, PDP, ELD, or VFD to display the first and second patterns.

5 is a block diagram of an exemplary configuration of the signal processing unit shown in FIG. 4. The signal processing unit 160 includes an image decoding unit 161, an image quality enhancer 162, a CSC block 163, And a correction unit 164 may be included.

5, the signal processing unit 160 converts an image signal input from the outside or an internal pattern stored in the memory 150, that is, the first pattern into a signal of a format that can be processed by the display unit 170 And may include a plurality of signal processing blocks 161 to 164.

The image decoding unit 161 receives the image signal separated into the luminance component Y and the color signal component C and decodes the image signal. For example, the image decoding unit 161 decodes the color signal C , V, and output the input video signal as Y, U, V.

As described above, the first pattern stored in the memory 150 may be a video signal compressed according to a predetermined encoding scheme, and the video decoding unit 161 may decode the video signal of the compressed first pattern, It is possible to perform decoding in the reverse process.

The second pattern stored in the memory 150 may be in an uncompressed form, for example, a Y, U, V format or a R, G, or B format, since the video signal of the second pattern does not pass through the video decoding unit 161. On the other hand, , And B format video signals.

The image quality enhancer 162 can perform color tone adjustment, contrast enhancement, color enhancement, noise filtering, and the like on the input image signal to adjust the image quality of an image to be displayed.

According to the embodiment of the present invention, the image quality enhancer 162 may change the display state of the first pattern according to the adjustment value input from the user. In addition, the second pattern does not pass through the image enhancer 162, so that the display state may not be changed according to the input adjustment value.

Between the video decoding unit 161 and the image quality enhancer 162 are provided a frame buffer for storing video signals on a frame basis and an interlacing video signal in a progressive manner A scaler (not shown) for converting a video signal to a vertical frequency, a resolution, an aspect ratio, etc. that conforms to the standard of the display unit 170, and the like.

The CSC block 163 performs color space conversion on an input video signal to convert the input color space into a color space that can be output to the display unit 170. For example, . ≪ / RTI >

According to an embodiment of the present invention, the CSC block 163 may change the display state of the first pattern, more specifically, the displayed color, according to the adjustment value input from the user. In addition, the second pattern does not go through the CSC block 163, so that the display state, more specifically, the displayed color may not be changed according to the input adjustment value.

Meanwhile, the second pattern may be generated as an image signal of RGB format that can be displayed on the display unit 170, and may be stored in the memory 150, without passing through the CSC block 163.

The gamma correction unit 164 may correct the input brightness level according to a gamma curve preset for a video signal output from the CSC block 163, for example, an RGB signal.

According to the embodiment of the present invention, the gamma correction unit 164 may change the display state of the first pattern according to the adjustment value input from the user. In addition, the second pattern does not pass through the gamma correction unit 164, so that the display state may not be changed according to the input adjustment value.

The first pattern image processed by the signal processing unit 160 including the plurality of signal processing blocks 161 through 164 and the second pattern output through the signal processing unit 160, (171).

That is, the image synthesizing unit 171 synthesizes the image signal of the first pattern image processed according to the input adjustment value and the second pattern that has not undergone the image process according to the adjustment value, The first and second patterns can be displayed together.

For example, the image combining unit 171 may process the first pattern and the second pattern as separate layers, and the video signal of the second pattern may be directly input from the memory 150 .

Since the configuration of the image processing apparatus as shown in FIG. 4 and FIG. 5 is only an embodiment of the present invention, the image processing apparatus according to the present invention is not limited to the configuration as shown in FIG.

The first pattern in which the display state is changed according to the input adjustment value as described above may be a test pattern for image quality adjustment and the second pattern in which the display state is not changed irrespective of the input adjustment value, 1 pattern, that is, a guide pattern serving as a reference of a test pattern.

Hereinafter, the first pattern will be referred to as a test pattern, and the second pattern will be referred to as a guide pattern, and embodiments according to the present invention will be described.

Meanwhile, the difference in hatching shown in the following figures may mean that the display quality of the corresponding area, for example, the image quality such as brightness, color or sharpness on one display screen is different from each other, The areas indicated by the same hatching may mean that the display states as described above are equal to each other.

Hereinafter, embodiments of a user interface (UI) provided to a user in an image processing apparatus for performing the first image quality adjusting method will be described in detail with reference to FIG. 6 through FIG.

According to the pattern display method for image quality adjustment according to the embodiment of the present invention, the state in which the test pattern 210 is displayed as described above can be changed together as the input adjustment value changes. More specifically, And may be changed to be the same as the display state of the guide pattern 220 as the adjustment value changes.

Referring to FIG. 6, a test pattern 210 and a guide pattern 220 may be disposed adjacent to each other on a display screen 200. For example, a test pattern 210 and a guide pattern 220 may be vertically As shown in FIG.

In this case, as the adjustment value is changed, the display state of the test pattern 210 may be gradually changed so as to become the same as the display state of the guide pattern 220.

The display state of the test pattern 210 or the guide pattern 220 indicates the image quality characteristics such as brightness, contrast, color density, tint, sharpness, or backlight brightness displayed on the screen 200 as described above can do.

As shown in FIG. 6, an adjustment value display OSD (On Screen Display) may be displayed on the display screen 200 to indicate the adjustment value input by the user. For example, Can be displayed in the form of a bar indicating a value.

On the other hand, the adjustment value display OSD may include a variable area 230 which is variablely displayed according to the adjustment value, and the rest of the adjustment value indication OSD, except for the variable area 230, Which may be a fixed region.

The variable area 230 of the adjustment value display OSD may display the value of the image quality element using at least one of a number, a character, and an indication of an abstract degree.

Meanwhile, according to the embodiment of the present invention, the display state of the test pattern 210 can be changed in synchronization with the change of the adjustment value indication OSD.

That is, the variable area 230 of the adjustment value display OSD is changed as the input adjustment value is changed. As the variable area 230 of the adjustment value display OSD is changed, the display area of the test pattern 210 Can also be changed.

For example, as the adjustment value increases, the variable area 230 of the adjustment value display OSD that displays the adjustment value changes in the y-direction, the variable area 230 of the adjustment value display OSD changes in the y- At the same time, the display state of the test pattern 210 can be changed.

As the adjustment value decreases, the variable area 230 of the adjustment value display OSD is changed to the y 'side direction, the variable area 230 of the adjustment value display OSD is changed to the y' side direction, and the test pattern 210 May be changed.

Referring to FIG. 6, the guide pattern 220 may include a plurality of images 221, 222, and 223.

Any one of the plurality of images 221, 222, and 223 included in the guide pattern 220 may be a standard image having a display quality that is a standard for image quality adjustment as described above, And may be an example image having a different display state from the standard image.

For example, the example images 222 and 223 are images representing the display state when the test pattern 210 is not displayed with the standard image quality, and the user can select the displayed standard image 221 and the example image 222 , 223 can be used to more accurately match the display state of the test pattern 210 to the standard picture quality.

That is, by displaying the standard image 221 and the example images 222 and 223 adjacent to the test pattern 210 as shown in FIG. 6, the user can view the displayed standard image 221 and the example images 222 The test pattern 210 and the guide pattern 220 can be more clearly grasped through the difference between the test pattern 210 and the guide pattern 220, The display state of the image 221 can be more accurately matched.

6, the guide pattern 220 displayed below the test pattern 210 includes a plurality of example images 222 and 223 arranged to the left and right of the standard image 221 and the standard image 221 can do.

For example, the images included in the guide pattern 220 may be sequentially arranged in the order of the first exemplary image 222, the standard image 221, and the second exemplary image 223 in the x-direction.

In this case, the display state of the test pattern 210 changes in synchronism with the change in the adjustment value indication OSD, and the display state of the test pattern 210 coincides with the direction in which the variable area 230 of the adjustment value indication OSD changes Lt; / RTI >

6, the test pattern 210 may have a display state between the display state of the first example image 222 and the display state of the standard image 223. In the embodiment shown in FIG.

For example, in brightness adjustment, when the adjustment value is '20', the brightness at which the test pattern 210 is displayed may be between the display brightness of the first example image 222 and the display brightness of the standard image 223 have. That is, the test pattern 210 may be displayed brighter than the first example image 222 and darker than the standard image 221.

In addition, according to the embodiment of the present invention, an image 240 other than the test pattern 210 and the guide pattern 220 may be displayed on the display screen 200 as shown in FIG.

As shown in FIG. 6, the image 240 may be displayed over the entire area of the display screen 200, and the image 240 may be a main image displayed on the image display device.

Meanwhile, a first region in which the main image 240 is displayed, a second region in which the test pattern 210 is displayed, a third region in which the guide pattern 220 is displayed, and a fourth region in which the adjustment value display OSD is displayed At least two regions may overlap each other as shown in Fig.

In addition, the main image 240 displayed on the screen 200 can be changed according to the input adjustment value. More specifically, the display state of the main image 240 and the test pattern 240, The display state of the display unit 210 can be simultaneously changed.

For example, a video signal corresponding to the main video 240 may be signal-processed by the signal processor 160 as described with reference to FIGS. 4 and 5, 170 so that the display state of the main image 240 can be changed according to the input adjustment value.

As the adjustment value increases in the above state and the variable area 230 of the adjustment value display OSD is changed to the x side direction, the display state of the test pattern 210 is also shifted to the x side direction Can be gradually changed so as to become the same as the display state of the adjacently arranged standard image 221.

On the other hand, as the variable area 230 of the adjustment value display OSD changes in the x-direction, the first exemplary image 222 located on the x'-side of the test pattern 210 and the standard image 222, Can be gradually increased.

On the other hand, as the variable area 230 of the adjustment value display OSD changes in the x-direction, the display state of the test pattern 210 is changed to the display of the second example image 223 located on the x- Lt; / RTI > state to be the same as the state.

In addition, when the adjustment value increases and the variable area 230 of the adjustment value display OSD reaches the first position, the display state of the test pattern 210 may visually match the display state of the standard image 221. [

As described above, the position of the variable area 230 of the adjustment value display OSD at the time when the display states of the test pattern 210 and the standard image 221 are visually matched, that is, the first value corresponding to the first position The adjustment value can be set so that the image quality adjustment according to the present invention can be performed.

As described above, as the adjustment value increases, the display state of the test pattern 210 changes, and at the same time, the display state of the main area 230 also changes.

For example, if the brightness of the test pattern 210 decreases as the adjustment value changes, the brightness of the main area 230 may also decrease at the same time. Also, when the color density of the test pattern 210 increases as the adjustment value changes, the color density of the main region 230 may also increase at the same time.

The image quality characteristic of the main area 230 may be the same as the image quality characteristic of the partial area included in the test pattern 210 or the test pattern 210. The main area 230 and its The display states of at least some areas of the test pattern 210 having the same image quality characteristics can be simultaneously changed.

As the adjustment value increases beyond the first value, the variable area 230 of the adjustment value indication OSD is changed in the x direction beyond the first position. In this case, as shown in FIG. 8, The display state of the second image 210 may be gradually changed to be the same as the display state of the second example image 223 located on the x side of the standard image 222. [

On the other hand, as the variable area 230 of the adjustment value display OSD is changed from the first position to the x side direction, the difference between the display states of the test pattern 210 and the standard image 222 can be gradually increased have.

Also, as the variable area 230 of the adjustment value display OSD is changed from the first position to the x-direction, the test pattern 210 and the first exemplary image 222 also gradually increase in the difference in display state .

On the other hand, as the variable area 230 of the adjustment value display OSD is changed to the x side direction beyond the first position, the display state of the main image 240 can also be changed along with the display state of the test pattern 210 .

As described above, the image quality adjustment method according to the embodiment of the present invention is performed sequentially for each of the image quality items such as brightness, contrast, color density, tint, sharpness, or backlight brightness .

Hereinafter, an embodiment of an image quality adjustment method according to an embodiment of the present invention will be described in more detail with reference to FIGS. 9 to 29. FIG.

FIG. 9 illustrates an embodiment of a user interface (UI) provided to a user to select a picture quality adjustment method.

Referring to FIG. 9, a box 201 on which a user can select one of the standard image quality adjustment method and the preferred image quality adjustment method may be displayed on the display screen 200.

For example, the user may select one of the standard image quality adjustment and the preferred image quality adjustment that can be displayed on the box 201 by using the left / right button provided on the input means such as a remote controller And the image display apparatus can perform image quality correction according to the selected image quality adjustment method.

When the user selects any one of the preference picture quality adjustments during the standard picture quality adjustment on the screen 200 as shown in FIG. 9, the picture quality adjustment items belonging to the first group among the plurality of picture quality adjustment items, the image quality adjustment for each of brightness, contrast, and tint may be sequentially performed according to the standard image quality adjustment method.

10 shows an embodiment of a method of adjusting the brightness of an image display apparatus. A description of the same structure as that described with reference to FIGS. 1 to 9 of the configuration shown in FIG. 10 will be omitted below do.

On the other hand, the brightness of the image display apparatus can be adjusted according to a predetermined method, that is, a standard image quality adjustment method, irrespective of the image quality adjustment method selected by the user.

Referring to FIG. 10, patterns 310 and 320 for adjusting brightness among a plurality of image quality adjustment items may be displayed on a display screen 200.

The image signal input from the outside is processed by the signal processor 160 of the image display device and then displayed on the display 170. The initial value of the adjustment value applied to the image processing of the signal processor 160 the image quality of the displayed image may be different from the image quality of the original image, that is, the standard image quality due to the defualt value or the erroneous image quality setting of the user.

For example, if the user sets the brightness to a small value (the brightness adjustment value is set to be small), the black areas of the image may not be distinguished from each other. If the user sets the brightness to a large value The white areas in the image may not be distinguished from each other.

That is, when the adjustment value of the image brightness is set to be small in the image display apparatus, the color reproducibility of the black regions of the image may deteriorate. On the contrary, when the brightness adjustment value is set large, Color reproducibility may be deteriorated.

According to the image quality adjustment method according to the embodiment of the present invention, the brightness of an image displayed on the display unit 170 and visually displayed to the user can be set to correspond to the standard image quality as described above.

Referring to FIG. 10, the test pattern 310 may include a plurality of regions having different brightnesses. For example, as shown in FIG. 11, the test patterns 310 may include a first region 311, 2 region 312, and a third region 313.

More specifically, the second region 312 has a brightness of about 0 IRE, the first region 311 has a higher brightness than the second region 312, the third region 313 has a brightness higher than that of the second region 312 ). ≪ / RTI >

The brightness of the first region 311 is +4 IRE, the brightness of the second region 312 is 0 IRE, and the brightness of the third region 313 is-4 IRE.

Here, when the color reproduction is 8 bits, the brightness of the color can be displayed in the gradation of 0 to 255, and the color reproduction is performed for the gradation of 16 to 235 according to the image quality standard. In this case, when the 16 gray levels which are the darkest black are set to 0 IRE, the gray level of 8 can be set to -4 IRE and the gray level of 24 can be set to +4 IRE.

That is, when the brightness of the image is set to the standard image quality, the 8-gradation image data and the 16-gradation image data are displayed so as not to be distinguished on the display screen 200, and the 16-gradation image data and the 24- Data may be displayed on the display screen 200 so as not to be identified.

That is, the brightness difference between the second area 312 and the third area 313 of the test pattern 310 is not visually identified by the user, and the brightness difference between the first area 311 and the second area 312 is It can be said that the case where the user is visually identified is set to the brightness of the standard image quality as described above.

Referring to FIG. 12, the case where the brightness of the image is not set to the standard image quality is shown as 4a and 4c, and the standard image quality is shown as 4b.

The adjustment of the brightness of the image changes the y-intercept of the straight line in the graph as shown in Fig. 12, and when the brightness increases, the y-intercept of the straight line increases and when the brightness decreases, the y- .

When the brightness level is set to a straight line of 4a or a straight line of 4c, the color reproducibility with respect to the black or white gradation becomes poor. In the case of the straight line 4a, the gradation from -4 IRE to 96 IRE, 200, and in the case of the straight line 4c, gradations of +4 IRE to 104 IRE can be displayed on the display screen 200. [

According to the image quality adjusting method according to the embodiment of the present invention, brightness can be adjusted so that gradations from 0 IRE to 100 IRE are displayed on the display screen 200 as shown in 4b in FIG.

That is, the case where the color reproduction is 8 bits, the 16 gradations are 0 IRE, and the 235 gradation is 100 IRE can be defined as the standard image quality. In the standard image quality, when the image data is less than 16 gradations, , And when the image data exceeds 235 gradations, it can be displayed on the screen 200 at 100 IRE.

The configuration of the test pattern 310 as described above is merely an embodiment of the present invention. Accordingly, the brightness or shape of each of the first, second and third regions 311, 312, and 313 may be varied . For example, the first, second and third regions 311, 312 and 313 constituting the test pattern 310 may have brightness of -2 IRE, 0 IRE and +2 IRE, respectively.

On the other hand, a brightness adjustment menu window 300 in which a guide pattern 320 including a plurality of images 321, 322, and 323 is displayed may be displayed on the display screen 200.

The recommended image 321 arranged at the center of the guide pattern 320 is a reference for setting the brightness of the image to the brightness of the standard image quality. The brightness of the standard image quality can be set by setting the adjustment value such that the brightness of the areas included in each pattern is visually matched.

For this purpose, the standard image 321 may be generated to have the contrast at which the test pattern 310 is displayed in the standard image quality as described above, and then stored in the memory 150, more specifically referring to FIG. 12 And can have the same brightness characteristics as the straight line 4b described above.

That is, the standard image 321 includes a first area and a second area with different brightness from each other, and the first area of the standard image 321 includes a first area 311 of the test image 310, And the second area of the standard image 321 corresponds to the second and third areas 312 and 313 of the test image 310 in the pattern.

Accordingly, when the display states of the test pattern 310 and the standard image 321 are visually matched, the brightness of the displayed image coincides with the brightness of the standard image quality, Can be set.

The first exemplary image (Low, 322) located on the left side of the standard image 321 of the guide pattern 320 includes a test pattern 310 when the adjustment value input by the user, that is, the brightness adjustment value is low, As shown in FIG.

That is, as the user decreases the adjustment value, the variable area 230 of the adjustment value display OSD is changed to the left direction, so that the display state of the test pattern 310 is the same as the first example image (Low, 322) It can be gradually changed.

10, the first exemplary image (Low) 322 is an image in which the entire area has uniform brightness, and more specifically, has the same brightness characteristics as the straight line 4a described with reference to FIG. 12, And the image data from IRE to +4 IRE are all displayed as 0 IRE.

That is, if the brightness adjustment value is very low, the areas 311, 312, and 313 of the test pattern 310 having brightness of +4 IRE, OIRE, and -4 IRE are all the first example image (Low, 322). ≪ / RTI >

The second example image (High, 323) located on the right side of the standard image 321 among the guide patterns 320 has a test pattern 310 when the adjustment value input by the user, that is, the brightness adjustment value is high, As shown in FIG.

That is, as the user increases the adjustment value, the variable area 230 of the adjustment value display OSD is changed to the right direction, and accordingly, the display state of the test pattern 310 is the same as the second example image (High, 322) It can be gradually changed.

As shown in FIG. 10, the second exemplary image (High) 323 is composed of three regions having different brightnesses, and more specifically, has the same brightness characteristic as the straight line 4c described with reference to FIG. 12, - 4 It is possible that image data from IRE to 0 IRE is also displayed on the screen.

That is, when the brightness adjustment value becomes very high, the regions 311, 312, and 313 (FIG. 3) of the test pattern 310 having the brightness of +4 IRE, ) Are displayed so that their brightnesses are different from each other, so that they can be visually identified to the user.

Therefore, as shown in FIG. 10, in the brightness adjustment menu window 300, a phrase to adjust the brightness value such that the display state of the test pattern 310 and the display state of the standard image (Recommended, 321) May be displayed so that the user can adjust the display state of the test pattern 310 and the standard image (Recommended 321) to set the adjustment value.

10, the brightness adjustment menu window 300 displays an image quality item (i.e., brightness) to be adjusted, an adjustment value display OSD 330 for indicating a brightness adjustment value to be input, A plurality of input buttons 340 and 350 may be displayed.

For example, the " RETURN "button 340 is for returning to the previous page or the previous image quality item, and the" ⊙ "button 350 may be for setting the brightness to the currently input adjustment value.

That is, when the display state of the test pattern 310 and the standard image 321, that is, the brightness of each area is visually matched, the user selects the "⊙" button 350, You can set the brightness level to a value.

The "RETURN" button 340 and the "⊙" button 350 may be provided in the image display apparatus or may be provided in a remote controller (not shown) outside the image display apparatus.

Since the test pattern 310 as described with reference to FIGS. 10 and 11 is only an embodiment of the present invention, the shape, size, number of regions, brightness of each of the regions, etc., can be changed.

13 shows an embodiment of a method of adjusting the contrast of an image display apparatus. Explanation of the same components as those described with reference to Figs. 1 to 12 of the configuration shown in Fig. 13 will be omitted do.

On the other hand, the contrast of the image display device can be adjusted according to a predetermined method, that is, a standard image quality adjustment method, irrespective of the image quality adjustment method selected by the user.

Referring to FIG. 13, patterns 410 and 420 for adjusting contrast among a plurality of image quality adjustment items may be displayed on a display screen 200.

The test pattern 410 may include a plurality of regions having different brightnesses. For example, as shown in FIG. 14, a first region 411, a second region 412, And a third area 413.

More specifically, the first region 411 may have a lower brightness than the second region 412, and the third region 413 may have a higher brightness than the second region 412, for example, Region 412 may have a brightness of about 100 IRE.

The brightness of the first region 411 is 97.5 IRE, the brightness of the second region 412 is 100 IRE, and the brightness of the third region 413 is 102.5 IRE .

The brightness difference between the second area 412 and the third area 413 of the test pattern 410 is not visually identified by the user and the first area 411 and the second area 411 2 region 412 can be visually identified by the user.

Referring to FIG. 15, the case where the contrast of the image is not set to the standard image quality is shown as 6a and 6c, and the standard image quality is shown as 6b.

The contrast of the image is adjusted by changing the slope of the straight line in the graph as shown in FIG. 15, and when the contrast is increased, the slope of the straight line is increased and when the contrast is decreased, the slope of the straight line is decreased.

When the brightness level is set to a straight line of 6a or 6c, the color reproducibility with respect to the white gradation becomes poor. In the case of the straight line 6a, the image data of the gradation exceeding 100 IRE is displayed on the display screen 200, Only the image data of less than 100 IRE, for example, up to about 95 IRE gradation, can be displayed on the display screen 200.

That is, in the case of the straight line 4c, for example, the image data of the 95 IRE gradation or more can not be displayed on the display screen 200 and can be displayed in white of 100 IRE.

According to the image quality adjustment method according to the embodiment of the present invention, the contrast can be adjusted so that gradations from 0 IRE to 100 IRE are displayed on the display screen 200 as shown by 6b in FIG.

That is, as described above, the first region 411 having the brightness of 97.5 IRE and the second region 412 having the brightness of 100 IRE among the test patterns 410 are displayed so that the brightness difference is discriminated by the user, The second region 412 having the brightness of 102.5 IRE and the third region 413 having the brightness of 102.5 IRE are displayed so that the brightness difference is not visually recognized by the user so that the contrast of the image can be set to the standard image quality.

The configuration of the test pattern 410 as described above is merely an embodiment of the present invention. Accordingly, the brightness or shape of each of the first, second, and third regions 411, 412, and 413 may be varied . For example, the first, second, and third regions 411, 412, and 413 constituting the test pattern 410 may have brightness of 104 IRE, 106 IRE, and 108 IRE, respectively.

On the other hand, a contrast adjustment menu window 400 may be displayed on the display screen 200 in which a guide pattern 420 including a plurality of images 421, 422, and 423 is displayed.

The recommended image 421 arranged at the center among the guide patterns 420 serves as a reference for setting the contrast of the image to the contrast of the standard image quality so that the user can set the display of the test pattern 410 and the standard image 421 The contrast of the standard image quality can be set by setting the adjustment value such that the brightness of the areas included in each pattern is visually matched.

For that purpose, the standard image 421 may be generated to have the contrast at which the test pattern 410 is displayed in the standard image quality as described above, and then stored in the memory 150, and more particularly with reference to FIG. 15 And can have the same brightness characteristics as the straight line 6b described above.

That is, the standard image 421 includes a first area and a second area having different brightnesses from each other, and the first area of the standard image 421 includes a first area 411 of the test image 410, And the second area of the standard image 421 may correspond to the second and third areas 412 and 413 of the test image 410 in the pattern.

Accordingly, when the display states of the test pattern 410 and the standard image 421 are visually matched, the contrast of the displayed image coincides with the contrast of the standard image quality, Can be set.

The first exemplary image (Low, 422) located on the left side of the standard image 421 of the guide pattern 420 includes a test pattern 410 when the adjustment value input by the user, i.e., the contrast adjustment value is low, As shown in FIG.

That is, as the user decreases the contrast value, the variable area 230 of the adjustment value display OSD changes position to the left direction, so that the display state of the test pattern 410 becomes the first example image (Low, 422) To be equal to < / RTI >

As shown in FIG. 13, the first exemplary image (Low) 422 is composed of three regions having different brightnesses, and more specifically, has the same brightness characteristic as the straight line 6a described with reference to FIG. 15, The image data from 100 IRE to 102.5 IRE may be displayed on the screen 200 as well.

That is, when the contrast value is very low, the regions 411, 412, and 413 of the test pattern 410 having the brightness of 97.5 IRE, 100 IRE, and 102.5 IRE, respectively, as in the first example image (Low) 421 These brightnesses are displayed differently from each other, and can be visually identified to the user.

The second example image (High) 423 located on the right side of the standard image 421 among the guide patterns 420 has a high contrast value when the adjustment value input by the user, that is, Display state.

That is, as the user increases the adjustment value, the variable area 230 of the adjustment value display OSD is changed to the right direction, and accordingly the display state of the test pattern 410 is the same as the second example image (High) 422 It can be gradually changed.

As shown in FIG. 13, the second exemplary image (High) 423 is an image having a uniform brightness throughout the whole area, more specifically, has a brightness characteristic similar to the straight line 6c described with reference to FIG. 15, Or all of the video data having the above gradation is displayed at 100 IRE.

That is, when the contrast adjustment value becomes very high, the areas 411, 412, and 413 of the test pattern 410 having the brightness of 97.5 IRE, 100 IRE, and 102.5 IRE are all the second example image (High) 422 And can be displayed at 100 IRE gradations, that is, white.

When the display state of the test pattern 410 and the standard image 421, that is, the brightness of each area, are visually matched, the user selects the "⊙" button 450 and displays the contrast You can set the level.

Since the test pattern 410 as described with reference to FIGS. 13 and 14 is only an embodiment of the present invention, the shape, size, number of regions, brightness of each of the regions, or the like of the test pattern 410 can be changed.

16 shows an embodiment of a method of adjusting the tint of the image display apparatus. The description of the same structure as that described with reference to Figs. 1 to 15 of the structure shown in Fig. 16 will be omitted below do.

Referring to FIG. 16, patterns 610 and 620 for adjusting a tint among a plurality of image quality adjustment items on the display screen 200 may be displayed.

The test pattern 610 may include a plurality of regions having different colors, for example, a first region 611 and a second region 612 having different colors as shown in FIG. 17, .

More specifically, the first region 611 has one of cyan, magenta, and yellow, and the second region 612 has one of the cyan, magenta, and yellow Lt; / RTI >

In one embodiment of the present invention, the first area 611 of the test pattern 610 may be composed of image data corresponding to a cyan color mixed with 75% of blue and 75% of red, (612) may be composed of image data corresponding to a magenta color mixed with 75% of blue and 75% of green.

As in the case of the color density adjustment, the video signal of the test pattern 610 may be output to the display unit 170 by extracting only the signal corresponding to the blue color at the final stage of the signal processing unit 160, Accordingly, the display unit 170 can display only the blue color among the test patterns 610. [

The color axis is moved by adjusting the tint of the image. If the tint is adjusted in one direction, the color density generally increases with respect to one color but decreases with respect to the other.

Accordingly, when the tint adjustment value input from the user is changed, the displayed color of the first area 611 is changed, and at the same time, the displayed color of the second area 612 is changed.

For example, as the input tint adjustment value increases, the blue color density of the displayed first region 611 decreases and the blue color density of the displayed second region 612 increases. Also, as the input tint adjustment value decreases, the blue color density of the displayed first region 611 increases and the blue color density of the displayed second region 612 may decrease.

If the tint of the image is set to the standard image quality, the displayed color difference between the first area 611 and the second area 612 of the test pattern 610 may not be visually identified by the user.

That is, as described above, the first region 611 having 75% cyan color and the second region 612 having 75% magenta color among the test patterns 610 are recognized by the user with the same color, (tint) can be set to the standard image quality.

The configuration of the test pattern 610 is merely an embodiment of the present invention, and thus the color or shape of each of the first and second regions 611 and 612 can be varied.

On the other hand, a tint adjustment menu window 600 displaying a guide pattern 620 including a plurality of images 621, 622, and 623 may be displayed on the display screen 200.

The recommended image 521 arranged at the center of the guide pattern 620 serves as a reference for setting the tint of the image to the standard image quality. The user can set the display state of the test pattern 610 and the standard image 621, That is, the standard image quality tint can be set by setting the adjustment value such that the brightness of the areas included in each pattern is visually matched.

For that purpose, the standard image 621 may be generated to have a tint in which the test pattern 610 is displayed in the standard image quality as described above, and then stored in the memory 150, and more specifically, And may be constituted by one area.

Accordingly, when the display states of the test pattern 610 and the standard image 621 are visually matched, the tint of the displayed image is set so as to coincide with the standard image quality, in fact, based on the time of the user .

The first exemplary image (Low, 622) located on the left side of the standard image 621 of the guide pattern 620 has a display state of the test pattern 610 when the tint adjustment value input by the user has a low value .

That is, as the user decreases the tint adjustment value, the variable area 230 of the adjustment value display OSD is changed to the left direction, and accordingly, the display state of the test pattern 610 is changed to the first example image (Low, 622) Can be gradually changed to become the same.

As shown in FIG. 16, the first exemplary image (Low) 622 is composed of two regions having different colors, and more specifically, a first region and a region 622 located inside the first region, And a second region having a blue color density lower than that of the first region.

That is, when the tint adjustment value becomes very low, the displayed blue color density of the first area 611 of the test pattern 610 increases and the displayed blue color density of the second area 612 decreases, The first and second areas 611 and 612 may be displayed in different colors such as the first example image (Low) 621 and visually recognized by the user. In this case, more specifically, the second region 612 of the test pattern 610, such as the first exemplary image (Low) 621, may be displayed with a lower blue color density than the first region 611.

The second example image (High, 622) located on the right side of the standard image 621 of the guide pattern 620 indicates the display state of the test pattern 610 when the tint adjustment value input by the user has a high value .

That is, as the user increases the tint adjustment value, the variable area 230 of the adjustment value display OSD is changed to the right direction, and accordingly, the display state of the test pattern 610 is changed to the second example image (High 622) Can be gradually changed to become the same.

As shown in FIG. 16, the second exemplary image (High) 622 is composed of two regions having different colors from each other, more specifically, a first region and a region located inside the first region, And a second region having a higher blue color density than the first region.

That is, when the tint adjustment value becomes very high, the displayed blue color density of the first area 611 of the test pattern 610 decreases and the displayed blue color density of the second area 612 increases, , The two regions 611 and 612 may be displayed in different colors, such as the second exemplary image (High) 622, and visually identified to the user. In this case, more specifically, the second area 612 of the test pattern 610 may be displayed with a higher blue color density than the first area 611, such as the second exemplary image (High) 622.

When the display state of the test pattern 610 and the standard image 621, that is, the brightness of each area, are visually matched, the user selects the " ⊙ "button 650, You can set the level.

Since the test pattern 610 described with reference to FIGS. 16 through 17 is only an embodiment of the present invention, the shape, size, number of regions, brightness of each of the regions, and the like of the test pattern 610 can be changed.

As for the brightness, contrast and tint belonging to the first group among the plurality of image quality adjustment items that can be adjusted as described above, the image quality is adjusted according to the fixed image quality adjustment method, that is, And the color quality and sharpness belonging to the second group can be adjusted by the image quality adjustment method selected by the user.

Hereinafter, with reference to FIGS. 18 to 22, an embodiment of a method for performing image quality adjustment for image quality adjustment items belonging to the second group when the user selects the standard image quality adjustment method will be described in detail .

18 shows an embodiment of a method of adjusting the color density of an image display apparatus according to the standard image quality adjusting method. In the configuration shown in Fig. 18, the same as that described with reference to Figs. 1 to 17 A description of what will be described below will be omitted.

Referring to FIG. 18, patterns 510 and 520 for adjusting the color density among a plurality of image quality adjustment items may be displayed on the display screen 200.

The test pattern 510 may include a plurality of regions having different colors. For example, as shown in FIG. 19, the test pattern 510 may include a first region 511 and a second region 512, .

More specifically, the first area 511 has a white color, and the second area 512 has a plurality of colors, for example, red, green, Lt; / RTI >

In one embodiment of the present invention, the first area 511 of the test pattern 510 may be composed of image data corresponding to 75% white color consisting of R: G: B = 75%: 75%: 75 And the second area 512 may be composed of image data corresponding to 75% blue color.

The video signal of the test pattern 510 may be output to the display unit 170 by extracting only the signal corresponding to the blue color at the final stage of the signal processing unit 160, Only the blue color of the pattern 510 can be displayed.

More specifically, referring to FIG. 5, the gamma correction unit 164 may output only the blue color of the image signal of the input test pattern 510. For example, the YUV signal may be RGB Only the signal corresponding to the blue color of the image signal of the test pattern 510 converted into the signal can be filtered and output to the image combining unit 171.

On the other hand, when the color density value, which is an adjustment value input from the user, is changed, the color in which the second area 512 is displayed may be changed. That is, as the input color density value increases, the blue color density of the displayed second region 512 may increase, and as the input color density value decreases, the blue color of the second region 512 displayed The color density can be reduced.

In contrast, in the case of the first area 511 having white color, the display state, that is, the displayed color is not changed even if the input adjustment value is changed. That is, even if the input color intensity value increases or decreases, the blue color density of the first area 511 is maintained at 75% of the original value, The displayed color can maintain a blue color with a constant color density.

When the color density of the image is set to the standard image quality, the displayed color difference between the first area 511 and the second area 512 of the test pattern 510 may not be visually recognized by the user.

That is, as described above, the first area 511 having 75% white color and the second area 512 having 75% blue color among the test patterns 510 are recognized by the user with the same color, The color can be set to the standard image quality.

The configuration of the test pattern 510 as described above is only an embodiment of the present invention, and thus the color or shape of each of the first and second regions 511 and 512 can be varied.

On the other hand, a color adjustment menu window 500 may be displayed on the display screen 200 in which a guide pattern 520 including a plurality of images 521, 522, and 523 is displayed.

A recommended image 521 arranged at the center of the guide pattern 520 is a reference for setting the color density of the image to the standard image quality. The user can set the display pattern of the test pattern 510 and the standard image 521 , That is, the brightness of the areas included in each pattern is visually matched, thereby setting the color density of the standard image quality.

For that purpose, the standard image 521 may be generated in the standard image quality as described above so that the test pattern 510 has the color density to be displayed and then stored in the memory 150, and more specifically, The branch can be composed of one region.

Accordingly, when the display states of the test pattern 510 and the standard image 521 are visually matched, the color density of the displayed image matches the standard image quality, .

The first exemplary image (Low, 522) located on the left side of the standard image 521 of the guide pattern 520 has a test pattern 510 (FIG. 5A) when the adjustment value input by the user, ). ≪ / RTI >

That is, as the user decreases the color density value, the variable area 230 of the adjustment value display OSD is changed to the left direction, and accordingly, the display state of the test pattern 510 becomes the first example image (Low) 522 Can be gradually changed to become the same.

As shown in FIG. 18, the first exemplary image (Low) 522 is composed of two areas having different colors, and more specifically, the first area and the first area And a second region having a blue color density lower than that of the first region.

That is, when the color density value becomes very low, the displayed blue color density of the second area 512 of the test pattern 510 decreases, so that the first and second areas 511 and 512 become the first example image (Low , 521), and can be visually identified to the user. In this case, more specifically, the second area 512 of the test pattern 510 may be displayed with a lower blue color density than the first area 511, such as the first exemplary image (Low) 521.

The second example image (High, 522) located on the right side of the standard image 521 of the guide pattern 520 has a larger value than that of the test pattern 510 when the adjustment value input by the user, Display state.

That is, as the user increases the color density value, the variable area 230 of the adjustment value display OSD is changed to the right direction, and accordingly, the display state of the test pattern 510 is changed to the second example image (High) 522 Can be gradually changed to become the same.

As shown in FIG. 18, the second exemplary image (High) 522 is composed of two regions having different colors, and more specifically, the first region and the first region are located inside the first region, And a second region having a higher blue color density than the first region.

That is, when the color density value becomes very high, the displayed blue color density of the second area 512 of the test pattern 510 increases, and the first and second areas 511 and 512 become the second example image (High, 522, and may be visually identified to the user. In this case, more specifically, the second area 512 of the test pattern 510 may be displayed with a higher blue color density than the first area 511, such as the second example image (High) 522.

When the display state of the test pattern 510 and the standard image 521, that is, the colors of the respective areas, are visually matched, the user selects the "⊙" button 550, The density level can be set.

Since the test pattern 510 as described with reference to FIGS. 16 and 17 is only an embodiment of the present invention, the shape, size, number of regions, brightness of each of the regions, and the like of the test pattern 510 can be changed.

In the above description, the method of adjusting the color density by using the blue color has been described. Alternatively, the color density may be adjusted by using the red or green color.

20 to 22 show an embodiment of a method of adjusting the sharpness of an image display apparatus according to the standard image quality adjusting method. In FIGS. 20 to 22, The description of the same things as those described with reference to FIG.

Referring to FIG. 20, patterns 710 and 720 for adjusting horizontal sharpness may be displayed on the display screen 200. Meanwhile, the plurality of images 721, 722, and 723 included in the test pattern 710 and the guide pattern 720 may include one or more lines extending in the vertical direction, respectively.

According to the embodiment of the present invention, the display state of the vertical line displayed in the test pattern 710 coincides with the display state of the vertical line displayed in the standard image 721 included in the guide pattern 720. That is, You can set the horizontal sharpness value.

Referring to FIG. 21, in order to enhance the sharpness of an image, it is possible to improve sharpness in the vicinity of an area having a high frequency component such as an edge or a texture of a original signal. When the original signal is passed through a high-frequency band-pass filter, a signal of the same type as that of 12B in FIG. 21 is obtained. By applying 'Coring' or 'Thresholding' to this signal, a filtering error Can be removed.

When the high-frequency component is multiplied by the weight and then added to the original signal, a signal having the same sharpness as that of 12B shown in Fig. 21 is finally obtained.

That is, an artificial overshoot or undershoot occurs in the original signal, and the transition width is reduced, thereby increasing the sharpness. The larger the weight value is, the more the high frequency component is amplified so that the sharpness is further increased.

However, if the weight value is set to a large value, sharpness is improved, but peaking occurs on the screen, and ultimately the user is highly likely to be perceived as an image including an unpleasant noise.

According to the embodiment of the present invention, when the sharpness adjustment value input from the user is changed, the weights multiplied by the high frequency band of the video signal as described above are changed, and the sharpness of the line displayed in the test pattern 710 Can be changed.

For example, as the input horizontal sharpness adjustment value increases, the weight increases and the sharpness of the vertical line displayed in the test pattern 710 may increase. In addition, as the input horizontal sharpness adjustment value decreases, the weight decreases and the sharpness of the vertical line displayed in the test pattern 710 can be reduced.

When the horizontal sharpness of the image is set to the standard image quality, the vertical line displayed in the test pattern 710 can be displayed clearly in one line of uniform brightness.

The configuration of the test pattern 710 is merely an embodiment of the present invention. Accordingly, the color, brightness or number of the vertical lines included in the test pattern 710 can be varied.

On the other hand, a horizontal sharpness adjustment menu window 700 may be displayed on the display screen 200 in which a guide pattern 720 including a plurality of images 721, 722, and 723 is displayed.

A recommended image 721 arranged at the center among the guide patterns 720 serves as a reference for setting the horizontal sharpness of the image to the standard image quality. The user can set the display state of the test pattern 710 and the standard image 721 , I.e., the brightness and shape of the vertical line included in each pattern are visually matched, thereby setting the horizontal sharpness of the standard image quality.

For this purpose, the standard image 721 can be generated in such a way that the test pattern 710 has the sharpness at which the test pattern 710 is displayed in the standard image quality as described above, and then stored in the memory 150. More specifically, And may include one vertical line having uniform brightness as shown in FIG.

Accordingly, when the display states of the test pattern 710 and the standard image 721 are visually matched, the vertical lines displayed in the test pattern 710 can be displayed as one line with uniform brightness, The horizontal sharpness of the displayed image can be set so as to coincide with the standard image quality, and actually, based on the time of the user.

The first exemplary image (Low, 722) located on the left side of the standard image 721 among the guide patterns 720 has a display state of the test pattern 710 when the horizontal sharpness adjustment value input by the user has a low value. Lt; / RTI >

That is, as the user decreases the horizontal sharpness adjustment value, the variable area 230 of the adjustment value display OSD changes to the left direction, and accordingly, the display state of the test pattern 710 becomes the first example image (Low, 722) To be equal to < / RTI >

As shown in Fig. 20, the first example image (Low, 722) may be configured to include a vertical line having a low sharpness, i.e., a border between the line and the periphery is uncertain, have.

That is, when the horizontal sharpness adjustment value becomes very low, the horizontal sharpness of the vertical line displayed in the test pattern 710 is reduced, and the vertical line and the surrounding boundary are uncertainly displayed as the first example image (Low, 721) .

The second example image (High) 722 located on the right side of the standard image 721 among the guide patterns 720 indicates the display state of the test pattern 710 when the horizontal sharpness adjustment value input by the user has a high value. will be.

That is, as the user increases the horizontal sharpness adjustment value, the variable area 230 of the adjustment value display OSD is shifted to the right, and accordingly, the display state of the test pattern 710 becomes the second example image (High) 722, To be equal to < / RTI >

As shown in FIG. 20, the second exemplary image (High) 722 may be configured to include a plurality of vertical lines having different brightnesses.

That is, if the horizontal sharpness adjustment value becomes very high, picking may occur around the vertical line of the test pattern 710 as described above, thereby displaying a line having the higher brightness around the vertical line, A plurality of vertical lines having different brightnesses can be displayed to the user.

More specifically, when the horizontal sharpness adjustment value becomes very high, the test pattern 710 may have vertical lines having white colors on the left and right sides of the vertical line, respectively, as in the display state of the second example image (High) 722 A plurality of vertical lines with visually different brightnesses can be identified to the user.

If the display state of the test pattern 710 and the standard image 721 match, that is, the brightness and shape of the vertical line, the user selects the " ⊙ "button 750, You can set the sharpness level.

Referring to FIG. 22, patterns 810 and 820 for adjusting the vertical sharpness may be displayed on the display screen 200. Meanwhile, the plurality of images 821, 822, and 823 included in the test pattern 810 and the guide pattern 820 may include one or more lines extending in the horizontal direction, respectively.

According to the embodiment of the present invention, the display state of the horizontal line displayed in the test pattern 810 and the display state of the horizontal line displayed in the standard image 821 included in the guide pattern 820 coincide with each other, You can set the vertical sharpness value.

For example, as the inputted vertical sharpness adjustment value increases, the weight increases as described above, and the sharpness of the horizontal line displayed in the test pattern 810 can be increased. Also, as the inputted vertical sharpness adjustment value decreases, the weight decreases and the sharpness of the horizontal line displayed in the test pattern 810 can be reduced.

When the vertical sharpness of the image is set to the standard image quality, the horizontal line displayed in the test pattern 810 can be displayed clearly in one line of uniform brightness.

The configuration of the test pattern 810 is only an embodiment of the present invention, and thus the color, brightness or number of the horizontal lines included in the test pattern 810 can be varied.

On the other hand, a vertical sharpness adjustment menu window 800 in which a guide pattern 820 including a plurality of images 821, 822, and 823 is displayed may be displayed on the display screen 200.

A recommended image 821 arranged at the center among the guide patterns 820 serves as a reference for setting the vertical sharpness of the image to the standard image quality. The user can set the display state of the test pattern 810 and the standard image 821 That is, the brightness and shape of the horizontal line included in each pattern are visually coincident with each other.

For this purpose, the standard image 821 may be generated so that the test pattern 810 has the sharpness at which the test pattern 810 is displayed at the standard image quality as described above, and then stored in the memory 150, and more specifically, And may include one vertical line having uniform brightness as shown in FIG.

Accordingly, when the display states of the test pattern 810 and the standard image 821 are visually matched, the horizontal line displayed in the test pattern 810 can be displayed as one line having uniform brightness, The vertical sharpness of the displayed image can be set so as to coincide with the standard image quality, and actually, based on the time of the user.

The first exemplary image (Low, 822) located on the left side of the standard image 821 of the guide pattern 820 has a display state of the test pattern 810 when the vertical sharpness adjustment value input by the user has a low value. Lt; / RTI >

That is, as the user decreases the vertical sharpness adjustment value, the variable area 230 of the adjustment value display OSD is changed to the left direction, and accordingly, the display state of the test pattern 810 becomes the first example image (Low, 822) To be equal to < / RTI >

As shown in Fig. 22, the first example image (Low, 822) may be configured to include a horizontal line whose brightness is low, i.e., the boundary of the line and the periphery is uncertain, have.

That is, when the vertical sharpness adjustment value becomes very low, the vertical sharpness of the horizontal line displayed in the test pattern 810 is reduced and the boundary between the horizontal line and the periphery is uncertainly displayed like the first example image (Low) 821 .

The second example image (High, 822) located on the right side of the standard image 821 of the guide pattern 820 indicates the display state of the test pattern 810 when the vertical sharpness adjustment value input by the user has a high value. will be.

That is, as the user increases the vertical sharpness adjustment value, the variable area 230 of the adjustment value display OSD is changed to the right direction, and accordingly, the display state of the test pattern 810 becomes the second example image (High, 822) To be equal to < / RTI >

As shown in FIG. 22, the second exemplary image (High) 822 may be configured to include a plurality of horizontal lines having different brightnesses.

That is, if the vertical sharpness adjustment value becomes very high, picking may occur around the horizontal line of the test pattern 810 as described above, thereby displaying a line having the higher brightness around the horizontal line, A plurality of horizontal lines whose brightnesses are different from each other can be displayed to the user.

More specifically, when the vertical sharpness adjustment value becomes very high, the test pattern 810 may generate horizontal lines having white colors on the left and right sides of the horizontal line, respectively, as in the display state of the second example image (High) 822 A plurality of horizontal lines having visually different brightnesses from each other can be identified to the user.

If the display state of the test pattern 810 and the standard image 821 match, that is, the brightness and shape of the horizontal line, the user selects the " ⊙ "button 850, You can set the sharpness level.

When the user selects the standard image quality adjustment, the image quality adjustment items such as brightness, contrast, tint, and color density are adjusted by performing the steps described with reference to FIGS. 10 to 22, the image quality can be sequentially corrected for color and sharpness.

Hereinafter, with reference to FIGS. 23 to 27, an embodiment of a method for performing image quality adjustment on image quality items belonging to the second group of image display apparatuses when the user selects the preferred image quality adjustment method will be described in detail do.

For example, when the user selects the preference image quality adjustment, steps as described with reference to Figs. 10 to 17 are performed to determine the first group of the plurality of image quality adjustment items, i.e., brightness, contrast the image quality may be sequentially corrected according to the preferred image quality adjustment method for color and sharpness of the second group after performing image quality adjustment for the contrast and tint.

Meanwhile, according to the preferred image quality adjustment method, the image quality of the item can be changed and set according to the adjustment value input by the user.

23 shows an embodiment of a method of adjusting the color density of a video display device according to the preferred image quality adjusting method. In the configuration shown in Fig. 23, the same as that described with reference to Figs. 1 to 22 A description of what will be described below will be omitted.

Referring to FIG. 23, a window 900 for adjusting the color density of the image display device may be displayed on the display screen 200 according to the preferred image quality adjustment method. The color density adjustment menu window 900 may display a box 910 for allowing the user to select an adjustment value.

On the other hand, the adjustment value that can be selected by the user using the box 910 may be preset to a predetermined number. For example, as shown in FIG. 23, the user can select any of "Original", "Medium" and "High" as the adjustment value for the color depth have.

Also, a guide pattern 920 may be displayed on the display screen 200, and the guide pattern 920 may include a plurality of example images 921, 922, and 923.

According to an embodiment of the present invention, the plurality of example images 921, 922, and 923 included in the guide pattern 920 may correspond to a plurality of user-selectable adjustment values, respectively.

In other words, the first example image 922 included in the guide pattern 920 includes the original (original), middle, and high of the user-selectable adjustment values Quot ;, the second exemplary image 921 corresponds to "Medium ", and the third exemplary image 923 corresponds to" High ".

On the other hand, the plurality of example images 921, 922, and 923 may differ in image quality, i.e., color, depending on the corresponding adjustment value.

That is, the first exemplary image 922 is an image having a color depth to be displayed when the user selects "Original " as an adjustment value, and the second exemplary image 921 is an image having a & And the third example image 923 may be an image having a color intensity to be displayed when selecting "High ".

For example, after confirming the example images 921, 922, and 923 displayed on the screen 200, the user can select and set an "Original" adjustment value having the most preferred color density.

24 shows an embodiment of a method of adjusting the horizontal sharpness of the image display device according to the preferred image quality adjusting method. In the configuration shown in FIG. 24, The same description will be omitted below.

24, a window 1000 for adjusting the horizontal sharpness of the image display device may be displayed on the display screen 200 according to the preferred image quality adjustment method, and the horizontal sharpness adjustment menu window 1000 may include A box 1010 may be displayed to allow the user to select an adjustment value.

On the other hand, the adjustment values that can be selected by the user using the box 1010 may be set in advance by a predetermined number. For example, as shown in Fig. 24, the user can select any one of "Original", "Medium" and "High" as adjustment values for the horizontal sharpness.

Also, a guide pattern 1020 may be displayed on the display screen 200, and the guide pattern 1020 may include a plurality of example images 1021, 1022, and 1023.

According to one embodiment of the present invention, the first exemplary image 1022 included in the guide pattern 1020 corresponds to "Original " among the user-selectable adjustment values, and the second exemplary image 1021, Quot; Medium ", and the third example image 1023 may correspond to "High ".

On the other hand, the first example image 1022 is an image having a horizontal sharpness to be displayed when the user selects "Original" as the adjustment value, and the second example image 1021 is " , And the third example image 1023 may be an image having a horizontal sharpness to be displayed when "High" is selected.

For example, the user can select and set the "Medium" adjustment value having the most preferred horizontal sharpness after confirming the example images 1021, 1022, and 1023 displayed on the screen 200. [

25 shows an embodiment of a method of adjusting the vertical sharpness (Vetical Sharpness) of the image display apparatus according to the preferred image quality adjusting method. In the configuration shown in FIG. 25, The same description will be omitted below.

25, a window 1100 for adjusting the vertical sharpness of the image display device may be displayed on the display screen 200 according to the preferred image quality adjustment method, and the vertical sharpness adjustment menu window 1100 may include A box 1110 may be displayed to allow the user to select an adjustment value.

On the other hand, the adjustment values that can be selected by the user using the box 1110 may be set in advance by a predetermined number. For example, as shown in Fig. 25, the user can select any of "Original", "Medium" and "High" as the adjustment value for the vertical sharpness.

In addition, a guide pattern 1120 may be displayed on the display screen 200 and the guide pattern 1120 may include a plurality of example images 1121, 1122, and 1123.

According to one embodiment of the present invention, the first exemplary image 1122 included in the guide pattern 1120 corresponds to "Original " among user-selectable adjustment values, and the second exemplary image 1121, Quot; Medium ", and the third example image 1123 may correspond to "High ".

On the other hand, the first example image 1122 is an image having a vertical sharpness to be displayed when the user selects "Original" as an adjustment value, and the second example image 1121 is " , And the third example image 1123 may be an image having a vertical sharpness to be displayed when "High" is selected.

For example, the user can select and set the "High" adjustment value having the most preferable vertical sharpness after confirming the example images 1121, 1122, and 1023 displayed on the screen 200. [

According to an embodiment of the present invention, when the user selects the preference image quality adjustment, an image quality adjustment item that is not adjusted according to the standard image quality adjustment method, for example, dynamic contrast and color tmperatue Image quality adjustment can be additionally performed.

The contrast, which is an image quality adjustment item as described with reference to FIGS. 13 to 15, can be a ratio of the maximum luminance to the minimum luminance of the image including the light reflected from the display by the external light.

On the other hand, the dynamic contrast may mean a maximum contrast ratio obtained by dimming the light amount of the screen instantaneously using a backlight for a very short time period of a very short time in a specific image area range.

26 shows an embodiment of a method of adjusting the dynamic contrast of an image display device according to the preferred image quality adjusting method. In the configuration shown in Fig. 26, The same description will be omitted below.

Referring to FIG. 26, a window 1200 for adjusting the dynamic contrast ratio of the image display device may be displayed on the display screen 200 according to the preferred image quality adjustment method. The dynamic contrast ratio adjustment menu window 1200 may include, A box 1210 may be displayed to allow the user to select an adjustment value.

On the other hand, the adjustment value that can be selected by the user using the box 1210 may be set in advance by a predetermined number. For example, as shown in FIG. 26, the user can select any one of "Off", "Medium" and "High" as adjustment values for the dynamic contrast ratio.

Also, a guide pattern 1220 may be displayed on the display screen 200, and the guide pattern 1220 may include a plurality of example images 1221, 1222, and 1223.

According to one embodiment of the present invention, the first exemplary image 1222 included in the guide pattern 1220 corresponds to "Off" among user-selectable adjustment values, and the second exemplary image 1221, Quot; Medium ", and the third example image 1223 may correspond to "High ".

On the other hand, the first example image 1222 is an image having a dynamic contrast ratio to be displayed when the user selects "Off" as an adjustment value, and the second example image 1221 is " , And the third example image 1223 may be an image having a dynamic contrast ratio to be displayed when "High" is selected.

For example, the user can select and set the "Off" adjustment value having the most preferred dynamic contrast ratio after confirming the example images 1221, 1222, and 1223 displayed on the screen 200. [

27 shows an embodiment of a method of adjusting the color temperature of a video display device according to the preferred image quality adjusting method. In the configuration shown in Fig. 27, the same as that described with reference to Figs. 1 to 26 A description of what will be described below will be omitted.

Referring to FIG. 27, a window 1300 for adjusting the color temperature of the image display device may be displayed on the display screen 200 according to the preferred image quality adjustment method. The color temperature adjustment menu window 1300 may be displayed by the user A box 1310 may be displayed to allow selection of the adjustment value.

On the other hand, the adjustment values that can be selected by the user using the box 1310 may be set in advance by a predetermined number. For example, as shown in FIG. 27, the user can select any one of "warm", "medium" and "cool" as adjustment values for the color temperature.

For example, "Warm", "Medium" and "Cool" may have color temperature values of 6500K, 9300K, and 11000K, respectively.

Also, a guide pattern 1320 can be displayed on the display screen 200, and the guide pattern 1320 can include a plurality of example images 1321, 1322, and 1323.

According to one embodiment of the present invention, the first exemplary image 1322 included in the guide pattern 1320 corresponds to "warm" of user-selectable adjustment values, and the second exemplary image 1321, Quot; Medium ", and the third example image 1223 may correspond to "Cool ".

On the other hand, the first example image 1322 is an image having a color temperature to be displayed when the user selects "Warm" as the adjustment value, and the second example image 1321 is an image And the third example image 1323 may be an image having a color temperature to be displayed when "Cool" is selected.

For example, the user can select and set the "warm" adjustment value having the most preferred color temperature after confirming the example images 1321, 1322, 1323 displayed on the screen 200.

10 to 27 illustrate that the main image 240 as described with reference to FIGS. 6 to 8 is not displayed on the display screen 200, but in the case shown in FIGS. 10 to 27, The main image 240 can be displayed.

In this case, as described above, the main image displayed on the display screen 200 can be changed simultaneously with the test pattern as the adjustment value changes.

After the image quality adjustment for a plurality of image quality items is performed according to the image quality adjustment method selected by the user as described above, the brightness of the backlight can be adjusted.

28 shows an embodiment of a method of adjusting the backlight brightness of an image display apparatus. Explanations of the same components as those described with reference to Figs. 1 to 27 of the configuration shown in Fig. 28 are omitted below .

For example, a liquid crystal panel of an LCD includes a liquid crystal layer and a TFT substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween. Since there is no self-luminous force, an image is displayed using light provided from the backlight unit .

On the other hand, the brightness of the backlight of the image display apparatus can be adjusted according to a predetermined method, that is, a standard image quality adjusting method, irrespective of the image quality adjusting method selected by the user.

Referring to FIG. 28, patterns 1410 and 1420 for adjusting the brightness of the backlight may be displayed on the display screen 200. FIG.

28, the test pattern 1410 may be displayed as a background screen on the entire area of the display screen 200. The brightness of the test pattern 1410 may be changed as the backlight adjustment value input from the user is changed Can be changed.

For example, as the input backlight adjustment value increases, the brightness of the displayed test pattern 1410 increases, and as the backlight adjustment decreases, the brightness of the displayed test pattern 1410 decreases.

On the other hand, a backlight adjustment menu window 1400 in which a guide pattern 1420 including a plurality of images 1421, 1422, and 1423 is displayed may be displayed on the display screen 200.

A recommended image 1421 arranged at the center of the guide pattern 1420 serves as a reference for setting the brightness of the backlight to the standard image quality. The user can set the display state of the test pattern 1410 and the standard image 1421, That is, the standard image quality can be set by setting the adjustment value such that the entire brightness is visually matched.

For that purpose, the standard image 1421 may be generated in the memory 150 after the test pattern 1410 has been displayed at the standard image quality as described above.

Accordingly, when the display states of the test pattern 1410 and the standard image 1421 are visually matched, the brightness of the backlight may be set so as to correspond to the standard image quality, have.

The first exemplary image (Low, 1422) located on the left side of the standard image 1421 among the guide patterns 1420 has a display state of the test pattern 1410 when the backlight adjustment value input by the user has a low value .

That is, as the user decreases the backlight adjustment value, the variable area 230 of the adjustment value display OSD is changed to the left direction, and accordingly, the display state of the test pattern 1410 is changed to the first example image (Low, 1422) Can be gradually changed to become the same.

As shown in FIG. 28, the first example image (Low) 1422 may have lower screen brightness than the standard image 1421.

That is, when the backlight adjustment value becomes very low, the total brightness at which the test pattern 1410 is displayed may be darkened to be equal to the total brightness of the first example image (Low 1421).

The second example image (High) 1422 located on the right side of the standard image 1421 among the guide patterns 1420 indicates the display state of the test pattern 1410 when the backlight adjustment value input by the user has a high value .

That is, as the user increases the backlight adjustment value, the variable area 1430 of the adjustment value display OSD is changed to the right direction, and accordingly, the display state of the test pattern 1410 is changed to the second example image (High) 1422 Can be gradually changed to become the same.

As shown in FIG. 28, the second exemplary image (High) 1422 may have a higher screen brightness than the standard image 1421.

That is, if the backlight adjustment value is very high, the total brightness at which the test pattern 1410 is displayed may be brightened to be equal to the total brightness of the second example image (High) 1422.

When the display state of the test pattern 1410 and the standard image 1421, that is, the total brightness, are visually matched, the user selects the " ⊙ "button 1450 to set the backlight brightness level Can be set.

According to another embodiment of the present invention, the backlight unit included in the image display apparatus may be driven by a whole driving method or a partial driving method such as local dimming, impulsive, or the like. The driving method of the backlight unit can be variously changed according to the circuit design, but is not limited thereto. Thus, in the embodiment, the color contrast ratio is increased and the image of the bright part and the dark part on the screen can be expressed clearly, thereby improving the image quality.

That is, the backlight unit is divided into a plurality of divided driving regions, and the luminance of the divided driving region is correlated with the luminance of the video signal to reduce the luminance of the black portion of the image and increase the luminance of the bright portion, The sharpness can be improved.

In this case, the backlight brightness adjusting method as described with reference to FIG. 28 can be performed for each of the plurality of divided driving areas of the backlight unit, and accordingly, the brightness can be adjusted for each of the plurality of divided driving areas.

28, the test pattern 1410 for adjusting the brightness of the backlight may be displayed in a size corresponding to the entire area of the screen, and may be displayed in the final stage of image quality adjustment, You can see the final adjustment results in full screen.

FIG. 29 shows an embodiment of a user interface for selecting an external input from a user. In the screen adjustment method according to the embodiment of the present invention as described above, Fig.

Referring to FIG. 29, when the image quality adjustment as described above, for example, adjustment of a plurality of image quality items is completed, an external input selection window for selecting an external input to which the setting by the image quality adjustment to be completed is applied (1500) may be displayed on the display screen (200).

The user can select at least one of a plurality of external inputs displayed in the external input selection window 1500 and select an external input to which the setting according to the image quality adjustment performed previously is applied.

For example, the user can select one or more external inputs to apply the setting among a plurality of external inputs displayed in the external input selection window 1500 using the direction key 1520 and the "MARK" button 1540, After the external input selection is completed, the user can press the "⊙" button 1530 to apply the setting to the selected external input.

On the other hand, by using the "RETURN" button 1510, it is possible to re-enter the previously performed image quality adjustment step, and the image quality adjustment for the corresponding item is performed again can do.

Also, at least one of the plurality of external inputs displayed in the external input selection window 1500 may be previously selected as an external input to which the setting is applied.

For example, "DTV" or "HDMI " external inputs providing a high quality image may be preselected as external inputs to which the adjustment values set in the standard picture quality as described above are applied. In addition, The external input provided with the video signal before performing the picture quality adjustment may be previously selected as the external input to which the setting item is applied.

However, when it is desired not to apply the setting items to the pre-selected external input, the user selects the corresponding external input using the direction key 1520 and then uses the 'MARK' button 1540 to select the external input You can deselect it.

In addition, the image quality adjusting method and the pattern display method according to the present invention can be stored in a computer-readable recording medium that is manufactured as a program to be executed in a computer. Examples of the computer- A ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. Functional programs, codes, and code segments for implementing the image quality adjustment method can be easily inferred by programmers in the art to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be understood that the invention may be embodied in other forms without departing from the spirit or scope of the invention. Accordingly, modifications of the embodiments of the present invention will not depart from the scope of the present invention.

Claims (20)

A picture quality adjustment method of a picture display apparatus for performing picture quality adjustment for a plurality of picture quality items,
Selecting one of a plurality of image quality adjustment methods; And
Performing image quality adjustment according to the selected image quality adjustment method for at least a part of a plurality of image quality adjustment items,
The first image quality adjustment method among the plurality of image quality adjustment methods
Displaying a first pattern and a second pattern comprising a standard image;
Receiving an adjustment value;
Changing a state in which the first pattern is displayed according to the input adjustment value; And
And displaying a message for instructing to set an adjustment value that matches the display state of the first pattern and the display state of the second pattern. 2. The method of claim 1,
Performing image quality adjustment for image quality adjustment items of the first group among the plurality of image quality adjustment items according to the first image quality adjustment method; And
And performing image quality adjustment according to the selected image quality adjustment method for the image quality adjustment items of the second group among the plurality of image quality adjustment items. The method according to claim 1,
Wherein the display state of the second pattern is not changed according to the adjustment value. The method according to claim 1,
Wherein the first and second patterns are stored in the image display device. The method according to claim 1,
Wherein the second pattern comprises the standard image and at least one example image. 6. The method of claim 5,
Wherein when the input adjustment value has a first value, the state in which the standard image of the first pattern and the standard pattern of the second pattern are displayed on the screen is visually matched. The method according to claim 6,
And setting the adjustment value to the first value. 6. The method of claim 5,
Wherein when the input adjustment value has a second value, the displayed image on the screen is visually consistent with the example image of the first pattern and the second pattern. 3. The method of claim 2,
Wherein the plurality of image quality adjusting methods include the first image quality adjusting method and the second image quality adjusting method,
And the picture quality adjustment items of the second group are adjusted in accordance with the selected picture quality adjustment method among the first and second picture quality adjustment methods. The method of claim 9, wherein the second image quality adjustment method comprises:
And setting an adjustment value inputted from a user. The method of claim 10, wherein the second image quality adjustment method comprises:
Displaying a plurality of example images; And
Selecting one of a predetermined number of adjustment values from a user,
Wherein the plurality of example images correspond to each of the plurality of adjustment values. 12. The method of claim 11,
An image quality adjustment method comprising original, medium and high. 12. The method of claim 11, wherein the plurality of example images
And the image quality is different according to the corresponding adjustment value. 10. The apparatus of claim 9, wherein the first group of image quality adjustment items
Wherein at least one of brightness, contrast, tint, and backlight brightness comprises at least one of brightness, contrast, brightness, and backlight brightness. 10. The apparatus of claim 9, wherein the second group of image quality adjustment items
Wherein the image quality adjustment includes at least one of color depth, sharpness, color depth, and sharpness. The method of claim 9, wherein the second image quality adjustment method comprises:
And the image quality adjustment is performed for at least one image quality adjustment item that is not adjusted according to the first image quality adjustment method. 10. The method of claim 9,
When the second image quality adjusting method among the first and second image quality adjusting methods is selected,
Further comprising performing image quality adjustment according to the second image quality adjustment method for at least one of dynamic contrast and color tmperatue. 11. The method of claim 10,
Wherein the plurality of example images include a plurality of regions in which any one of color density, sharpness, dynamic contrast, and color temperature are different from each other. The method according to claim 1,
Wherein image quality adjustment is performed in the order of brightness, contrast, tint, color, sharpness, and backlight brightness among the plurality of image quality items. The method according to claim 1,
And selecting an external input to which the adjustment value according to the performed image quality adjustment is to be applied.

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