KR20160071886A - Apparatus and method for compensating degradation and display device including the same - Google Patents

Abstract

Provided are an apparatus and a method for compensating degradation which can prevent degradation of a light emitting element due to image sticking by reducing a brightness level difference between a logo area and a surrounding area adjacent to the logo area in an image displayed on a screen; and a display apparatus including the same. The degradation compensating apparatus comprises: a logo brightness adjustment module; a surrounding brightness adjustment module; and an image composition unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a deterioration compensating apparatus and method, and a display device including the compensating degradation display apparatus.

The present invention relates to a deterioration compensation apparatus for a display apparatus, and more particularly, to a deterioration compensation apparatus for compensating deterioration of a display apparatus by using a deterioration compensation apparatus capable of preventing a deterioration of an organic light emitting element due to a residual image due to a difference in brightness level of a logo of a high- And a display device including the same.

Flat panel displays (FPDs) are used in various types of electronic products including mobile phones, tablet PCs, and notebook computers. The flat panel display includes a liquid crystal display (LCD), a plasma display panel (PDP), and an organic electroluminescence display (OLED). Recently, an electrophoretic display device EPD: ELECTROPHORETIC DISPLAY) is also widely used.

The organic light emitting diode (OLED) has advantages of high response speed, light emitting efficiency, luminance and viewing angle by using a self-luminous element which emits light by itself.

1 is a view showing a pixel structure of a general organic light emitting display device.

As shown in FIG. 1, the pixel 10 of the organic light emitting display includes at least two switching elements ST and DT and an organic light emitting diode (OLED).

In the organic light emitting diode OLED, the anode electrode is connected to the first power supply VDD and the cathode electrode is connected to the second power supply VSS. The organic light emitting diode OLED generates light of a predetermined luminance corresponding to the current supplied from the second switching device DT.

The various circuits formed in the pixel 10 control an amount of current supplied to the organic light emitting diode OLED corresponding to a video signal supplied to the data line DL when a gate signal is supplied to the gate line GL. To this end, the pixel 10 includes a second switching device DT, a second switching device DT, a data line DL, and a gate line (not shown) connected between the first power source VDD and the organic light emitting device OLED And a capacitor C connected between the gate electrode of the first switching device ST and the second switching device DT and the organic light emitting device OLED connected between the organic light emitting device OL and the OLED.

The organic light emitting display having the above-described pixel 10 structure displays an image by driving the organic light emitting device OLED, which is a self-light emitting device, so that deterioration of the organic light emitting device OLED progresses for various reasons. That is, when an image including an object of a high luminance component such as a logo is continuously applied due to the self-light emission characteristic of the organic light emitting diode OLED, deterioration occurs due to the logo. By such deterioration, a difference in brightness and color is recognized in the organic light emitting display device, and a residual image is left.

2 is a diagram showing an example of an image displayed on an organic light emitting display device.

As shown in Figs. 2A and 2B, the logo 1 having a high luminance component is output to a specific portion of the image displayed on the organic light emitting display device.

When the logo 1 of such a high luminance component is continuously output in a certain region, the organic light emitting element OLED corresponding to the region where the logo 1 is output is deteriorated.

In order to prevent the organic light emitting diode OLED from deteriorating in this manner, correction has been performed in the conventional organic light emitting diode display device by adjusting the brightness of the logo.

At this time, if the brightness of the logo is excessively reduced, the logo color and the like are distorted, so that the brightness of the logo is reduced to a proper level in the conventional organic light emitting display.

However, even if the brightness of the logo is reduced to an appropriate level, the brightness level difference between the logo surrounding area and the logo is large. Such a brightness level difference causes deterioration of the organic light emitting device OLED, do.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a deterioration compensation device and a compensation method that can prevent deterioration of an organic light emitting device due to a residual image by reducing a brightness level difference between a logo region and an adjacent peripheral region in an image displayed on a screen.

According to an aspect of the present invention, there is provided a deterioration compensation apparatus including a logo brightness adjustment module, an ambient brightness adjustment module, and an image composition unit.

The logo brightness adjustment module detects the logo area from the image signal and adjusts the brightness level of the logo area to be reduced to output the correction logo area.

The peripheral luminance adjustment module detects a peripheral region adjacent to the logo region from the image signal, and adjusts the luminance level of the peripheral region to be increased to output the correction peripheral region.

The image synthesis unit synthesizes the corrected logo region and the corrected peripheral region in the image signal to generate image data.

According to another aspect of the present invention, there is provided a compensation method for a deterioration compensation apparatus, including: outputting a correction logo region, detecting a peripheral region, outputting a correction peripheral region, .

The degradation compensation apparatus according to the present invention detects a logo region and a surrounding region in an image to adjust a brightness level, respectively, wherein a logo region reduces a brightness level, and a peripheral region gradually increases a brightness level, It is possible to reduce the brightness level difference between the two.

Accordingly, it is possible to remove the after-image caused by the brightness level difference between the logo region and the peripheral region in the display device, thereby preventing deterioration of the organic light emitting element.

1 is a view showing a pixel structure of a general organic light emitting display device.
2 is a diagram showing an example of an image displayed on an organic light emitting display device.
3 is a view illustrating an organic light emitting display according to an embodiment of the present invention.
4 is a diagram showing a configuration of the deterioration compensating unit shown in FIG.
FIG. 5 is an operational flowchart of the deterioration compensator shown in FIG. 4, and FIGS. 6A to 6F are operational examples of the deterioration compensator.
7 is a graph illustrating brightness levels of the logo region and the surrounding region in the conventional image and the image of the present invention.

Hereinafter, a deterioration compensation apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

For convenience of explanation, an example in which the deterioration compensation device is applied to the organic light emitting display device will be described in the present invention. However, the present invention is not limited thereto, and it will be obvious that a deterioration compensation device can be applied to a liquid crystal display device and the like in addition to the organic light emitting display device.

3 is a view illustrating an organic light emitting display according to an embodiment of the present invention.

3, the OLED display 100 may include a display panel 110, a gate driver 120, a data driver 130, and a timing controller 140. Referring to FIG.

The display panel 110 may include a plurality of gate lines GL and a plurality of data lines DL. In addition, a plurality of sub-pixels 115 may be formed in each of the intersecting regions of the plurality of gate lines GL and the plurality of data lines DL. The plurality of subpixels 115 may comprise W subpixels, R subpixels, G subpixels, and B subpixels. The arrangement of the plurality of subpixels 115 can be variously changed, and each can output light of a unique color.

Each of the plurality of sub-pixels 115 may be composed of a plurality of switching elements ST and DT and an organic light emitting element OLED.

The plurality of switching elements ST and DT are connected to the gate line GL and the data line DL to supply a video signal supplied through the data line DL when the gate signal is supplied from the gate line GL, The amount of current supplied to the organic light emitting diode OLED can be controlled corresponding to the signal. The plurality of switching elements ST and DT may include a switching transistor ST and a driving transistor DT.

The switching transistor ST may be connected between the gate line GL, the data line DL and the driving transistor DT. The switching transistor ST may transmit the data signal to the driving transistor DT in accordance with the gate signal.

The driving transistor DT may be connected between the first power supply VDD and the organic light emitting diode OLED. The driving transistor DT may control an amount of current supplied from the first power source VDD to the organic light emitting diode OLED according to a data signal provided from the switching transistor ST.

A capacitor C may be connected between the gate electrode of the driving transistor DT and the organic light emitting diode OLED.

In the organic light emitting device OLED, the anode electrode may be connected to the driving transistor DT, and the cathode electrode may be connected to the second power source VSS. The organic light emitting diode OLED can generate and output light of a predetermined luminance according to the current supplied from the driving transistor DT.

The gate driver 120 generates a gate signal according to the gate control signal GCS provided from the timing controller 140 and sequentially outputs the generated gate signal to each of the plurality of gate lines GL of the display panel 110 can do. The gate driver 120 may be formed independently of the display panel 110 or may be mounted in the display panel 110.

The data driver 130 generates a data signal from the image data RGB 'according to the data control signal DCS provided from the timing controller 140 and supplies the generated data signal to a plurality of data lines DL, respectively. The data driver 130 may generate a data signal from the image data RGB 'using a gamma voltage supplied from a gamma voltage generator (not shown).

Meanwhile, the image data RGB 'provided to the data driver 130 is converted into a luminance level of a region including a specific portion of the image, for example, a logo, etc., by the deterioration compensation unit 150, That is, the gradation level is lowered.

The timing controller 140 may generate a gate control signal GCS and a data control signal DCS according to a control signal provided from an external system (not shown). The gate control signal GCS and the data control signal DCS may be output to the gate driver 120 and the data driver 130, respectively.

The gate control signal GCS may include a gate start pulse GSP, a gate shift clock GSC, an output enable signal GOE, and the like. The data control signal DCS may include a source start pulse SSP, a source sampling clock SSC, an output enable signal SOE, a polarity control signal POL, and the like.

The timing control unit 140 may further include a deterioration compensation unit 150. [ The degradation compensation unit 150 adjusts the logo region and the brightness level of the peripheral region of the peripheral region with respect to the logo region among the image signals RGB provided from the external system, So that the image data RGB 'can be generated. The image data RGB 'generated by the deterioration compensating unit 150 may be output to the data driver 130.

For example, a logo region in which a logo exists in a video signal (RGB) is composed of pixels having a higher brightness level, i.e., a higher gray level, than other regions. Therefore, it is necessary to lower the brightness level of the logo region, that is, the gradation level for each pixel of the logo region, in order to prevent the organic light emitting device OLED of the display panel 110 from being deteriorated by the logo region.

At this time, if the brightness level of the logo region is excessively lowered, color distortion of the logo region occurs, so that the brightness level of the logo region is reduced to an appropriate level. However, even if the brightness level of the logo region is lowered, the logo region has a brightness level higher than that of the surrounding region, resulting in a residual image or the like in the logo region and the surrounding region.

Therefore, the deterioration compensating unit 150 increases the luminance level of the peripheral region to a certain level while lowering the luminance level of the logo region, thereby generating a residual image in the logo region and the peripheral region, and the organic light emitting element OLED is deteriorated Can be prevented.

4 is a diagram showing a configuration of the deterioration compensating unit shown in FIG.

3 and 4, the deterioration compensating unit 150 may include a logo brightness adjusting module 160, an ambient brightness adjusting module 170, and an image combining unit 180.

The logo brightness adjustment module 160 may output the corrected logo region LR 'in which the brightness level is reduced by adjusting the brightness level of the logo region LR detected from the image signal RGB. The logo brightness adjustment module 160 may output the corrected logo region LR 'by adjusting the gradation level for each pixel constituting the logo region LR to be reduced to a predetermined range. The logo brightness adjustment module 160 may include a logo region detection unit 161 and a logo region brightness adjustment unit 163. [

The logo area detecting unit 161 can detect the logo area LR including the logo in the image signal RGB. The logo area detecting unit 161 may detect the logo area LR in at least one frame image of the image signal RGB. The logo area detecting unit 161 can detect a case where an object having the same gradation level at the same position exists in at least one frame image as a logo area LR including a logo.

The logo region brightness adjusting unit 163 may output the corrected logo region LR 'in which the brightness level is decreased by adjusting the brightness level of the detected logo region LR. The logo region brightness adjusting unit 163 reduces the grayscale level of each of the plurality of pixels constituting the logo region LR according to a predetermined reduction ratio, It is possible to output the area LR '.

The peripheral luminance adjustment module 170 detects the peripheral portion NR from the logo region LR output from the logo luminance adjustment module 160 and adjusts the luminance level of the detected peripheral region NR, It is possible to output the corrected peripheral region NR 'whose level has been increased. The peripheral luminance adjustment module 170 may output the correction peripheral region NR 'by adjusting the gradation level for each pixel constituting the peripheral region NR to be increased to a predetermined range. The peripheral luminance adjustment module 170 may include a peripheral region detection unit 171 and a peripheral region luminance adjustment unit 173. [

The peripheral region detecting unit 171 can detect the peripheral region NR adjacent to the logo region LR detected earlier in the video signal RGB. The peripheral region detecting unit 171 can detect the surrounding region NR from at least one frame image of the video signal RGB. The peripheral region detecting unit 171 can detect the peripheral region NR while moving the mask of a predetermined size in one direction in the frame image.

The peripheral region luminance adjusting unit 173 can output the corrected peripheral region NR 'in which the luminance level is increased by adjusting the luminance level of the detected peripheral region NR. The peripheral region luminance controller 173 can output the corrected peripheral region NR 'in which the luminance level is increased by increasing the gray level of each of the plurality of pixels constituting the peripheral region NR.

The peripheral region luminance controller 173 increases the gradation level for each pixel so that the luminance level of the peripheral region NR can be gradually increased while the maximum luminance level of the correction peripheral region NR ' It is possible to increase the gradation level for each pixel of the peripheral region NR so as to have a value equal to or smaller than the luminance level of the luminance signal LR '.

The image synthesizing unit 180 synthesizes the corrected logo region LR 'with reduced brightness level and the corrected surrounding region NR' with increased brightness level to the image signal RGB and rearranges the synthesized image signals So that the image data RGB 'can be generated. The image data RGB 'may be output to the data driver 130 together with the data control signal DCS.

FIG. 5 is an operational flowchart of the deterioration compensator shown in FIG. 4, and FIGS. 6A to 6F are operational examples of the deterioration compensator.

4 and 5, when a video signal RGB is input from an external system, the logo area detecting unit 161 detects the logo area LR including the logo in the video signal RGB (S20). The detected logo region LR may be a region having a higher brightness level than the remaining region, that is, the non-logo region.

The logo area detecting unit 161 may compare all the pixels of the video signal RGB on a frame basis, and may detect the logo area LR according to the comparison result. In addition, the logo area detecting unit 161 may detect the logo area LR by determining the presence or absence of the logo in each block, dividing the pixels into blocks of a predetermined size in at least one frame of the image signal RGB have.

As shown in FIG. 6A, the logo area detecting unit 161 may detect the logo area LR in at least one frame of the image signal RGB, for example, the N frame image N frame. The detected logo region LR may be composed of pixels having a higher brightness level than the surrounding, i.e., non-logo region. In the example shown in FIG. 6A, the logo region LR is detected as a 3 * 5 size composed of 15 pixels having 255 gradation levels, but the present invention is not limited thereto.

The logo region brightness adjusting unit 163 can output the corrected logo region LR 'by adjusting the brightness level of the detected logo region LR (S25). The logo region luminance regulator 163 can adjust the luminance level of the logo region LR by adjusting the gradation level for each of the plurality of pixels of the logo region LR. For example, the logo region brightness adjusting unit 163 may adjust the gradation level of each of the plurality of pixels of the logo region LR to be lowered according to a predetermined reduction ratio, for example, a reduction ratio of 20 to 30%.

The logo region brightness adjustment unit 163 adjusts each of the pixels of the detected logo region LR shown in FIG. 6A to have a gradation level ranging from 180 to 250 at the initial 255 gradation level, The luminance level can be reduced.

The peripheral area detecting unit 171 detects the peripheral area NR of the logo area LR from the Nth frame image N frame of the video signal RGB according to the logo area LR outputted from the logo area detecting unit 161 Can be detected. The peripheral area detecting unit 171 can detect the peripheral area NR from the Nth frame image N frame using the mask M having a predetermined size.

6A to 6E, the peripheral area detecting unit 171 detects the peripheral area NR while moving the mask M in one direction, e.g., the x-axis direction, from the N-th frame image N frame .

The mask M may include a plurality of regions each corresponding to a pixel of the Nth frame image (N Frame), and may have a size of 5 * 5. In the central portion of the mask M, a reference region SP for defining pixels constituting the peripheral region NR may be set.

The peripheral area detecting unit 171 moves the mask M by one pixel in the x axis direction after associating the reference area SP of the mask M with the first pixel of the N frame image N frame (S30). Then, it is determined whether at least one of the plurality of regions of the moved mask M corresponds to the pixels of the logo region LR (S40).

If it is determined that any region of the mask M does not correspond to the pixel of the logo region LR (N), the peripheral region detecting unit 171 can move the mask M again by one pixel in the x-axis direction (S30 ).

However, if it is determined that the partial area of the mask M corresponds to the pixel of the logo area LR (Y), the peripheral area detecting unit 171 can determine the position of the reference area SP of the mask M (S50).

If the reference area SP of the mask M corresponds to the pixel of the logo area LR, that is, if the reference area SP is located in the logo area LR (LR), the peripheral area detection unit 171 May be repeatedly performed from step S20 of moving the mask M by one pixel in the x-axis direction.

However, if it is determined that the reference area SP of the mask M does not correspond to the pixels of the logo area LR, that is, if the reference area SP is located in the non-logo area (NR) The pixel corresponding to the reference area SP of the mask M can be set as the peripheral area pixel.

As described above, the peripheral area detecting unit 171 detects the area of the logo area LR corresponding to a plurality of areas of the mask M while moving the mask M by one pixel in one direction from the Nth frame image (N Frame) By repeating the operation of setting the pixel as a peripheral area pixel, it is possible to detect the peripheral area NR composed of a plurality of pixels in the Nth frame image (N Frame).

6B, if one side area of the moved mask M corresponds to a pixel of the logo area LR and the reference area SP does not correspond to the pixel of the logo area LR, (171) can set the pixel corresponding to the reference area (SP) of the mask (M) as the peripheral area pixel.

Subsequently, as shown in Figs. 6C to 6E, the mask M is shifted by one pixel in the x-axis direction, the region of the mask M corresponds to the pixel of the logo region LR, Does not correspond to the pixel of the logo region LR, the peripheral region detecting section 171 can set the pixel corresponding to the reference region SP of the mask M as the peripheral region pixel.

Then, the above-described operations are repeated for a plurality of pixels of the N-frame image (N Frame) to form a first peripheral area NR1 defined by the pixels surrounding the logo area LR ) And the second peripheral area NR2 can be detected.

The first peripheral region NR1 may be constituted by peripheral region pixels set according to the operation of the peripheral region detecting section 171 shown in Figs. 6C and 6D. The second peripheral area NR2 may be constituted by peripheral area pixels set according to the operation of the peripheral area detecting part 171 shown in Figs. 6B and 6E.

On the other hand, the number of the peripheral regions NR detected by the mask M may vary depending on the size of the mask M. For example, as the size of the mask M increases, the number of peripheral regions NR to be detected can be increased. Conversely, the smaller the size of the mask M, the smaller the number of peripheral regions NR to be detected.

The greater the number of the peripheral regions NR detected by the peripheral region detecting section 171, the gentler the brightness level difference between the logo region LR and the peripheral region NR becomes. However, as the number of the peripheral regions NR increases, the boundary between the logo region LR and the peripheral region NR may become blurred, and the operation speed of the peripheral region detection unit 171 may be reduced due to the large- Can be remarkably deteriorated. Therefore, it would be preferable to use a mask M having a size enough to detect a suitable number, for example, one to three peripheral areas NR, with respect to the logo area LR.

After the operation of setting the peripheral area pixels by the peripheral area detector 171 shown in Fig. 6C or the operation of setting the peripheral area pixels by the peripheral area detector 171 shown in Fig. 6D, the mask M ) Correspond to the pixels of the logo region LR. At this time, the peripheral region detecting unit 171 can perform only the operation of moving the mask M by one pixel in the x-axis direction from the N-th frame image (N Frame).

The peripheral region luminance adjusting unit 173 may output the corrected peripheral region NR 'by adjusting the luminance level of one or more peripheral regions NR detected by the peripheral region detecting unit 171 (S60). The peripheral region luminance adjusting section 173 can output the corrected peripheral region NR 'in which the luminance level is increased by increasing the gradation level of each pixel in the peripheral region NR.

The peripheral area luminance adjusting unit 173 calculates the gray level of the peripheral area pixels according to the average gray level of the pixels corresponding to the entire area of the mask M when the peripheral area pixels are set by the peripheral area detecting unit 171 , It is possible to increase the gradation level of each pixel of the peripheral region NR.

For example, each pixel of the logo region LR may be a 255-gradation level, and each pixel of the non-logo region may be a 0-gradation level. In addition, a pixel for the second peripheral region NR can be set by the reference region SP of the mask M. [ The peripheral region luminance controller 173 can calculate the gradation level for the pixels in the second peripheral region NR through the following Equation (1).

[Equation 1]

SP_g = (255 * n1) + (0 * n2) / N

Here, n1 is the number of regions of the mask overlapping the pixels of the logo region, n2 is the number of regions of the mask overlapping the pixels of the non-logo region, and N may be the total number of regions of the mask.

That is, since the five regions on one side of the mask M correspond to the pixels of the logo region LR in FIG. 6B, the 51 gradation levels can be calculated for the pixels in the set second peripheral region NR2. Thus, the pixels in the second peripheral region NR2 can be increased to the 51 gradation level at the initial 0 gradation level.

In Fig. 6C, ten regions on one side of the mask M correspond to pixels in the logo region LR, and pixels in the first peripheral region NR1 from the reference region SP can be set. Then, a 102-level gradation level can be calculated for a pixel in the first peripheral region NR1 through Equation (1). Therefore, the pixels of the first peripheral region NR1 can be increased from the initial 0 gradation level to the 102 gradation level.

The peripheral region luminance adjusting unit 173 may repeat the above-described gradation level calculating operation for all the pixels in the first peripheral region NR1 and all the pixels in the second peripheral region NR2.

Accordingly, as shown in FIG. 6F, the peripheral region brightness adjusting unit 173 adjusts the corrected peripheral region NR 'in which the luminance level, that is, the gradation level increases gradually from the non-logo region to the logo region LR Can be output. The peripheral region luminance controller 173 may output the first correction peripheral region for the first peripheral region NR1 and output the second correction peripheral region for the second peripheral region NR2.

The first correction peripheral region is the region closest to the logo region LR, and each pixel can have 102 gradation levels by the peripheral region luminance regulator 173. [ The second correction peripheral area is a region between the non-logo area and the first correction peripheral area, and each pixel of the peripheral area luminance controller 173 can have 51 gray level.

Further, as described above, the brightness level of the logo region LR can be lowered by the logo region brightness adjustment unit 163. [ The logo region brightness adjustment unit 163 can adjust the respective pixels of the logo region LR to have a gradation level that is 25% lower than the initial gradation level. Accordingly, each pixel of the logo region LR can be reduced to the 192 gradation level at the initial 255 gradation level.

As described above, the deterioration compensation apparatus 150 according to the present embodiment adjusts the brightness level for the logo region LR and the surrounding region NR, respectively, while reducing the brightness level of the logo region LR, The brightness level of the region NR can be gradually increased as it is adjacent to the logo region LR to thereby reduce the brightness level difference between the logo region LR and the surrounding region NR.

The image synthesizing unit 180 synthesizes and rearranges the corrected logo region LR 'in which the luminance level is decreased and the correction peripheral region NR' in which the luminance level is increased to the image signal RGB and outputs the rearranged image data RGB ') And output it (S70).

7 is a diagram illustrating the image brightness level of a conventional organic light emitting display device and the image brightness level of the organic light emitting display device of the present invention. In the graph of Fig. 7, the y-axis represents the magnitude of the brightness level, and the x-axis represents the logo and the surrounding region in the image.

7, in the conventional organic light emitting diode display and the organic light emitting diode display according to the present invention, image data including a logo region LR having a luminance level DELTA L lower than the original luminance level RGB'1, RGB'2) can be displayed.

At this time, in the image data (RGB '1) displayed in the conventional OLED display device, only the brightness level for the logo region LR is reduced, so that the brightness level difference between the logo region LR and the surrounding region NR is large . Accordingly, in the conventional organic light emitting diode display, the organic light emitting diode OLED is deteriorated due to afterglow generated in the logo region LR and the peripheral region NR.

However, in the image data (RGB'2) displayed in the OLED display according to the present invention, the brightness level of the logo region LR is decreased and the brightness level of the surrounding region NR is gradually increased, The difference in luminance level between the luminance region LR and the peripheral region NR becomes small. Therefore, in the organic light emitting display according to the present invention, after-images are not generated in the logo region LR and the peripheral region NR, so that the organic light emitting diode OLED is not deteriorated.

The luminance level of an image displayed in the OLED display according to the present invention can be measured using a luminance meter. That is, a luminance meter is disposed in the region where the logo is located in the image and the periphery thereof, and the brightness of the logo and the surrounding is measured to obtain the image brightness level as shown in FIG.

While a number of embodiments have been described in detail above, it should be construed as being illustrative of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

100: organic light emitting display device 110: display panel
120: Gate driver 130: Data driver
140: timing controller 150: deterioration compensator
160: Logo brightness adjustment module 161: Logo area detection section
163: logo region luminance adjustment unit 170: peripheral luminance adjustment module
171: peripheral area detecting unit 173: peripheral area luminance adjusting unit
180:

Claims (14)

A logo brightness adjustment module for detecting a logo area from a video signal and outputting a correction logo area by adjusting the brightness level of the logo area to be reduced;
An ambient brightness adjustment module for detecting a peripheral region adjacent to the logo region from the image signal and outputting a correction peripheral region by adjusting the luminance level of the peripheral region to be increased; And
And an image synthesizing unit synthesizing the corrected logo region and the corrected peripheral region to the image signal to generate image data. The image processing apparatus according to claim 1,
A logo area detecting unit detecting the logo area from the video signal; And
And a logo region brightness adjusting unit for reducing the gradation level of each of the plurality of pixels of the logo region according to a predetermined reduction ratio to output the corrected logo region. The apparatus of claim 1, wherein the ambient brightness adjustment module comprises:
A peripheral region detecting unit that detects the peripheral region adjacent to the logo region from the video signal using a mask having a plurality of regions corresponding to each of a plurality of pixels of the video signal; And
And a peripheral region luminance adjusting unit for increasing a gradation level of each of a plurality of pixels of the peripheral region to output the corrected peripheral region. The method of claim 3,
Wherein the mask is moved in one direction by one pixel in the video signal. The method of claim 3,
Wherein the maximum brightness level of the correction peripheral region is equal to or smaller than the brightness level of the correction logo region. The method of claim 3,
As the size of the mask increases, a plurality of peripheral regions are detected from the video signal,
Wherein the plurality of peripheral regions are output as a plurality of correction peripheral regions whose luminance levels are gradually increased so as to have a larger luminance level as being closer to the logo region. Detecting a logo region in a video signal and adjusting a brightness level of the logo region to be reduced to output a corrected logo region;
Detecting a peripheral region adjacent to the logo region while moving a mask having a plurality of regions each corresponding to a plurality of pixels of the image signal in one direction;
Adjusting a brightness level of the peripheral region to be increased to output a correction peripheral region; And
And generating image data by synthesizing the corrected logo region and the corrected peripheral region with the image signal. 8. The method of claim 7,
Wherein one of the plurality of regions of the mask is set as a reference region,
Wherein the detecting the peripheral region comprises:
Determining if at least one of the plurality of regions of the mask corresponds to pixels of the logo region;
Determining if the reference region corresponds to a pixel of the logo region if at least one of the plurality of regions of the mask corresponds to a pixel of the logo region; And
And setting a pixel corresponding to the reference area in the video signal as a pixel in the peripheral area if the reference area does not correspond to the pixel in the logo area. 9. The method of claim 8,
If at least one of the plurality of regions of the mask does not correspond to a pixel of the logo region, or if the reference region corresponds to a pixel of the logo region,
Wherein the detecting the peripheral region comprises:
And moving the mask by one pixel in one direction. 9. The method of claim 8,
When the pixels of the peripheral region are set,
Wherein the step of outputting the correction peripheral region comprises:
And calculating the gray level for the pixels in the peripheral region according to the average gray level of the pixels of the logo region and the non-logo region corresponding to the plurality of regions of the mask. Of compensation method. 8. The method of claim 7,
As the size of the mask increases, a plurality of peripheral regions are detected from the video signal,
Wherein the step of outputting the correction peripheral region comprises:
Wherein the brightness level of each of the plurality of peripheral areas is gradually increased to output a plurality of correction peripheral areas so that the peripheral area closest to the logo area among the plurality of peripheral areas has a maximum brightness level. Method of compensating the device. 8. The method of claim 7,
Wherein the step of outputting the corrected logo region comprises:
And decreasing a gradation level for each of a plurality of pixels of the logo region according to a predetermined reduction ratio to output the corrected logo region. 13. The method of claim 12,
Wherein the maximum brightness level of the correction peripheral region is increased to have a value equal to or smaller than the brightness level of the correction logo region. A display panel provided with an organic light emitting element;
A deterioration compensation unit for detecting a logo region and a surrounding region in an image signal input from the outside, adjusting the brightness level of the logo region to be decreased, and adjusting the brightness level of the surrounding region to be increased so as to generate image data; And
And a data driver for outputting the image data to the display panel.

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