KR20160043548A - Image Sticking Reducing Device And Method Of Organic Light Emitting Display - Google Patents

Abstract

The present invention relates to an afterimage reduction device and method for an organic light emitting display, which is capable of implementing an image shift technology for a reduction in afterimage without perception of a user. The afterimage reduction device according to the present invention comprises an image shift control unit, and an image shift unit. The image shift control unit generates an image shift enable signal based on an eye blinking time at which eyes of a user blink. The image shift unit shifts an input image, displayed on the display panel, by a predetermined pixel interval, in one predetermined direction in response to the image shift enable signal.

Description

Technical Field [0001] The present invention relates to an image retention reducing device and an image retention method for an organic light emitting display,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a device and method for reducing a residual image of an organic light emitting display device that reduces a residual image through image shifting.

Flat panel displays (FPDs) are used in various types of electronic products including mobile phones, tablet PCs, and notebook computers.

Among the flat panel display devices, the organic light emitting display device is a self-luminous device that emits an organic light emitting layer by recombination of electrons and holes, and is expected to be a next generation display device because it has a high luminance, a low driving voltage and an ultra thin film. Each of the plurality of pixels constituting the organic light emitting diode display device includes an organic light emitting diode (OLED), which is a light emitting device composed of an anode electrode, a cathode electrode, and an organic light emitting layer formed therebetween, And a pixel circuit for driving the pixel circuit. The pixel circuit mainly includes a switching thin film transistor (hereinafter referred to as TFT), a storage capacitor, and a driving element (driving TFT). The switching TFT charges a data voltage in a capacitor in response to a scan signal, and the driving TFT controls a magnitude of a current supplied to the OLED according to the magnitude of a voltage charged in the capacitor, thereby adjusting an amount of light emitted from the OLED. The amount of light emission of the OLED is proportional to the current supplied from the driving TFT.

Such an organic light emitting display device is vulnerable to an after-image due to deterioration of an OLED element. Particularly, the problem of after-image due to deterioration is severe in a portion where a fixed pattern is displayed for a long time such as a logo of a broadcasting company. And a display image is shifted in a specific direction (for example, up, down, left, right, etc.) by a predetermined interval at predetermined time intervals to disperse the deterioration. Such conventional image shifting techniques have the following problems.

First, conventional image shifting technology performs image shifting without considering a user's perception characteristic. Therefore, the shifted image may be perceived by the user, which may cause discomfort to the user.

Second, the conventional image shifting technology distinguishes a still image from a moving image through motion detection, and shifts the image on a still image. Conventional image shift techniques are for preventing deterioration only in still images and fixed patterns, and it is difficult to improve the afterimage due to accumulation of deterioration such as moving image logos and captions.

Third, the conventional image shift technology requires a large amount of frame memory and other hardware for analyzing the motion of the input image, and thus the manufacturing cost is high.

Accordingly, it is an object of the present invention to provide an afterimage-reducing device and an abatement method of an organic light-emitting display device capable of realizing a video shift technique for reducing afterimage without being noticed by a user.

In order to achieve the above object, a residual image reduction apparatus of the present invention includes an image shift control unit and an image shift unit. The image shift control unit generates an image shift enable signal based on an eye blinking time at which a user's eyes blink. The image shifting unit shifts the input image displayed on the display panel by a predetermined pixel interval in a predetermined direction in accordance with the image shift enable signal.

An image shift control unit according to an embodiment of the present invention includes an image analysis unit, a blinking time detection unit, and an ISE generation unit. The image analyzing unit separates the input image signal of one frame into a luminance component Y and a chrominance component U and V and calculates a luminance average value for the luminance component Y and a color average value for the chrominance components U and V . The blinking time detection unit may be configured to determine whether the difference in the average luminance value between the previous frame and the current frame is greater than a predetermined first threshold value or if the difference in color average value between the previous frame and the current frame is greater than a predetermined second threshold value It is determined as a shot change, and a blinking time detection signal indicating an eye blinking time is output. The ISE generator generates a video shift enable signal according to the blinking time detection signal.

The image shift control unit may further include a voice analysis unit for calculating an average value of voice signals by averaging the voice signals of one frame inputted from the outside together with the input image according to an exemplary embodiment of the present invention. Here, the blinking time detection unit may further determine a current frame as a shot change if the difference of the average value of the audio signals between the previous frame and the current frame is greater than a predetermined third threshold, Can be output.

The image shift control unit according to an embodiment of the present invention includes a camera unit, a blinking time detection unit, and an ISE generation unit. The camera unit is positioned at one side of the display panel, captures an image of a user's eye, and outputs eye tracking information. Then, the blinking time detection unit outputs a blinking time detection signal indicating the iblinking time based on the eye tracking information. The ISE generator generates a video shift enable signal according to the blinking time detection signal.

The image shift control unit according to an embodiment of the present invention includes a data base, a blinking time detection unit, and an ISE generation unit. In the database, frame data in which blinking occurs is stored in advance. The blinking time detection unit compares the input image and the database and outputs a blinking time detection signal indicating the blinking time when the frame data of the input image is identical to any one of the frame data of the database . The ISE generator generates a video shift enable signal according to the blinking time detection signal.

The image shift controller according to an embodiment of the present invention may further include a shift frequency controller for controlling the image shift frequency by controlling the ISE generator. When the blinking time detection signal is input to the ISE generation unit, the shift frequency adjustment unit counts the time from the generation time of the previous image shift enable signal through the frame counter to the current frame, If the reference value is not satisfied, the ISE generator may be controlled to prevent the image shift enable signal from being generated.

The image shift unit according to an embodiment of the present invention includes a display start point generating unit and a first horizontal and vertical position modulating unit. The display start point generating unit generates a display start point in consideration of a predetermined pixel interval in one direction when a video shift enable signal is input. The first horizontal and vertical position modulating unit modulates the input image data so that the input image is shifted in one direction in accordance with the display start point.

The image shift unit according to an embodiment of the present invention includes a display start point generating unit and a second horizontal and vertical position modulating unit. The display start point generating unit generates a display start point in consideration of a predetermined pixel interval in one direction when a video shift enable signal is input. The second horizontal and vertical position modulator modulates data display synchronization signals according to the display start point, and outputs the input image data in synchronization with the modulated synchronization signals.

According to another aspect of the present invention, there is provided a method of reducing afterimage, comprising: generating a video shift enable signal based on an eye blinking time of a user's eyes; And shifting the pixel by a predetermined pixel interval in a predetermined direction in accordance with an enable signal.

The present invention implements a video shift at the instant that the user's eyes are blinking, which are derived through prediction or observation. The present invention minimizes side effects such as discomfort caused by the user's cognitive characteristics by preventing the user from perceiving the image shifting as much as possible by performing image shifting at the moment when the user's brain enters the rest.

1 is a block diagram showing an organic light emitting display device for reducing afterimage of the present invention.
2 is a diagram showing a schematic configuration of a residual image reduction circuit according to the present invention;
3 is a diagram showing a specific example of the configuration of a residual image reduction circuit according to the present invention.
4 is a flow chart showing an operation of the afterimage reducing circuit shown in FIG.
Fig. 5 is a flowchart showing another operation of the afterimage reducing circuit shown in Fig. 3; Fig.
6 is a diagram showing another specific configuration example of a residual image reduction circuit according to the present invention.
7 is a flowchart showing the operation of the afterimage reducing circuit shown in Fig.
Fig. 8 is a diagram showing another concrete configuration example of the afterimage reducing circuit according to the present invention. Fig.
9 is a diagram showing a process of constructing a database for image shift.
10 is a flow chart showing the operation of the afterimage reducing circuit shown in FIG.
11 to 13 are views showing specific examples of a video shift to which the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1 to 13. FIG.

FIG. 1 is a block diagram showing an organic light emitting diode display of the present invention. 2 shows a schematic configuration of a residual image reduction circuit according to the present invention.

1 and 2, an organic light emitting diode display panel 10, a timing controller 11, a data driving circuit 12, a gate driving circuit 13, and a residual image reducing circuit 20 according to the present invention, Respectively.

In the display panel 10, a plurality of data lines 15 and a plurality of gate lines 16 are intersected, and pixels are arranged in a matrix form in each of the intersection areas. Each pixel has an OLED and a pixel circuit. The pixel circuit includes a driver TFT (DT) for controlling the amount of current flowing through the OLED and a switching portion (SC) for programming the gate-source voltage of the driver TFT (DT). The switching unit SC may include at least one switch TFT and a storage capacitor. The switch TFT is turned on in response to a scan signal from the gate line 16, thereby charging the data voltage from the data line 15 to one electrode of the storage capacitor. The driving TFT controls the amount of current supplied to the OLED according to the magnitude of the voltage charged in the storage capacitor to control the amount of light emitted from the OLED. The amount of light emission of the OLED is proportional to the current supplied from the driving TFT. These pixels are supplied with a high potential power source (EVDD) and a low potential power source (EVSS) from a power source not shown. The TFTs constituting the pixel may be implemented as a p-type or an n-type. In addition, the semiconductor layer of the TFTs constituting the pixel may include amorphous silicon, polysilicon, or an oxide.

The timing controller 11 receives digital video data RGB of an input image from the host system 14 through an interface circuit (not shown) and outputs the digital video data RGB of the input image to a residual image reduction circuit 20, And supplies the modulated image data (RmGmBm) processed for image shift in the residual image reduction circuit 20 to the data driving circuit 12 through a mini-LVDS interface method or the like.

The timing controller 11 receives timing signals such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE and a dot clock CLK from the host system 14, And generates control signals for controlling the operation timing of the drive circuit 12 and the gate drive circuit 13. [ The control signals include a gate timing control signal GDC for controlling the operation timing of the gate drive circuit 13 and a source timing control signal DDC for controlling the operation timing of the data drive circuit 12. [ In some cases, the gate timing control signal GDC and the source timing control signal DDC may be modulated in the afterimage reducing circuit 20. [

The data driving circuit 12 converts the modulated image data RmGmBm into a data voltage in accordance with the data control signal DDC from the timing controller 11 and supplies the data voltage to the data lines 15. [

The gate drive circuit 13 generates a scan signal in accordance with the gate control signal GDC from the timing controller 11 and supplies the scan signal to the gate lines 16 in a line sequential manner.

The residual image reduction circuit 20 can be incorporated in the timing controller 11. [

The residual image reduction circuit 20 performs image shifting not only for a still image but also for a moving image. In particular, a user's eye derived from the moment the user's brain enters a rest, that is, At this flashing moment, the video shift is performed.

It is known that for some time the human brain enters the rest, a system of brain regions called the "Default Mode Network (or Default Network)" is activated. The activity of this "Default Mode Network" increases when you are not focused, but when you blink, especially when you blink. Statistics show that humans are generally blinking about 15-20 times per minute, moments when concentration is relaxed, for example, at the end of sentences or paragraphs during reading, and moments when scenes change during movie appreciation (That is, moments when the camera's point of view changes with an actor or conversation) blinks unconsciously.

The residual image reduction circuit 20 includes the image shift control unit 22 and the image shift unit 24 as shown in FIG. 2 so that image shifting can be performed at the moment when the default mode network is activated, that is, do.

The image shift controller 22 predicts or observes the eye blinking time of the eye of the user to derive a blinking time detection signal, and based on the blinking time detection signal, (ISE). The image shift control unit 22 may detect the scene change point based on the luminance or color analysis result between neighboring frames and detect the scene change point as an i-blinking time. (See Fig. 4) (See FIG. 5). The video shift control unit 22 detects a scene change point based on the result of voice analysis between neighboring frames, and detects the scene change point by using the i-blinking time. (See FIG. 7). The image shift control unit 22 pre-processes the image information in which the blinking of the eye occurs, and displays the image corresponding to the image in the database The input timing can be detected as an i-blinking time (see FIG. 10). Specific examples of the image shift controller 22 are shown in FIGS. 3 to 10 And will be described later in detail.

The image shift section 24 receives the image shift enable signal ISE from the image shift control section 22 and outputs an input image displayed on the display panel 10 in accordance with the image shift enable signal ISE Shifted by a predetermined pixel interval in one direction in accordance with a predetermined shift circulation order. Here, the shift circulation order can be set in various ways, which will be described later with reference to FIGS. 11 to 13. FIG.

3 shows a specific example of the configuration of the afterimage reduction circuit 20 according to the present invention. Figs. 4 and 5 show control procedures from the afterimage reduction circuit 20 shown in Fig. 3 until the image shift is executed.

3 and 4, the image shift control unit 22 of the residual image reduction circuit 20 includes an image analysis unit 221, a blinking time detection unit 223, and an ISE generation unit 224. [

The image analyzer 221 separates the input image signal RGB for one frame into a luminance component Y and a chrominance component U and V through a known luminance / (U, V) can be calculated (S11, S12).

The blinking time detection unit 223 receives the calculation result from the image analysis unit 221 and, if the luminance average value difference between the neighboring previous frame and the current frame is greater than a predetermined first threshold THD, And outputs a blinking time detection signal (BTI) indicating the above-mentioned eye blinking time. The blinking time detection unit 223 receives the calculation result from the image analysis unit 221 and then determines whether the difference between the color averages of the previous frame and the current frame is greater than a predetermined second threshold THD, And further outputs a blinking time detection signal (BTI) indicating the above-mentioned eye blinking time (S13, S14). Here, the scene (Shot) As a unit, one camera is used to direct a single screen taken continuously without interrupting the shooting.

The ISE generating unit 224 may generate the image shift enable signal ISE according to the blinking time sensing signal BTI from the blinking time sensing unit 223. In step S16,

3 and 5, the video shift control unit 22 of the afterimage reduction circuit 20 averages the audio signals of one frame input from the outside (host system) together with the input video, (Step S21). [0054] In step S21,

In this case, the blinking time detection unit 223 detects the blinking time of the current frame by the shot change if the difference between the average values of the audio signals between the neighboring previous frame and the current frame is greater than a predetermined third threshold TH And may further output the blinking time detection signal (BTI) (S22, S23)

The video shift unit 24 of the residual image reduction circuit 20 includes the display start point generating unit 241 and the horizontal and vertical position modulating units 242 and 243 to generate a video shift enable signal ISE The input image displayed on the display panel 10 is shifted by a predetermined pixel interval in one direction according to a predetermined shift circulation order. (S16, S25)

The display start point generating unit 241 may generate a display start point in consideration of a predetermined pixel interval in the one direction when the video shift enable signal ISE is input from the video shift control unit 22. [

The horizontal and vertical position modulation units 242 and 243 may directly modulate the input image data RGB according to the display start point and may also synchronize data display synchronization signals (data enable signal DE, horizontal The synchronization signal Hsync, the vertical synchronization signal Vsync, etc.) may be directly modulated.

That is, the horizontal and vertical position modulating units 242 and 243 may modulate the input image data RGB by controlling the pixel position and the line position so that the input image is shifted in the one direction according to the display start point. This requires a separate line memory.

The horizontal and vertical position modulation units 242 and 243 modulate the data display synchronization signals (the data enable signal DE, the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync, etc.) in accordance with the display start point , And output the input image data (RGB) in synchronization with the modulated synchronous signals. This eliminates the need for a separate line memory, which is advantageous in reducing manufacturing costs.

The image shift controller 22 of FIG. 3 may further include a shift frequency adjuster 225 for controlling the image shift frequency by controlling the ISE generator 224.

When the blinking time detection signal BTI is input from the blinking time detection unit 223 to the ISE generation unit 224, the shift frequency adjustment unit 225 outputs the previous image shift enable signal The ISE generating unit 224 counts the time from the generation time of the current frame to the current frame and stops the generation of the image shift enable signal ISE when the count value is less than a preset reference value (S15, S24) Here, the reference value may be set to a minimum time required for the OLED element to deteriorate due to the fixed pattern of the image.

Accordingly, the shift frequency adjuster 225 can prevent the image shift cycle from being shortened more than necessary due to a sudden change in brightness such as a flashlight image by giving a lower limit value to the image shift cycle.

Fig. 6 shows another specific configuration example of the afterimage reducing circuit 20 according to the present invention, and Fig. 7 shows the operation of the afterimage reducing circuit 20 shown in Fig.

6 and 7, the image shift control unit 22 of the residual image reduction circuit 20 includes a camera unit 321, a blinking time sensing unit 322, and an ISE generating unit 224. [

The camera unit 321 is located at one side of the display panel 10 and can output eye tracking information (ETI) by capturing an image of the user's eyes. (S31)

The blinking time sensing unit 322 may output a blinking time sensing signal BTI indicating the eyeblinking time based on the eye tracking information ETI from the camera unit 321. (S32, S33)

The ISE generating unit 224 may generate the image shift enable signal ISE according to the blinking time sensing signal BTI from the blinking time sensing unit 322. In step S35,

The image shift section 24 of the residual image reduction circuit 20 is substantially the same as that described in Fig.

The image shift control unit 22 of FIG. 6 may further include a shift frequency adjustment unit 225 for controlling the image shift frequency by controlling the ISE generation unit 224.

When the blinking time detection signal BTI is input from the blinking time detection unit 322 to the ISE generation unit 224, the shift frequency adjustment unit 225 outputs the previous image shift enable signal The ISE generating unit 224 counts the time from the generation time of the current frame to the current frame and stops the generation of the image shift enable signal ISE when the count value is less than a preset reference value (S34) Here, the reference value may be set to a minimum time required for the OLED element to deteriorate due to the fixed pattern of the image.

Accordingly, the shift frequency adjuster 225 can prevent the image shift cycle from being shortened more than necessary due to a sudden change in brightness such as a flashlight image by giving a lower limit value to the image shift cycle.

Fig. 8 shows another concrete configuration example of the afterimage reducing circuit according to the present invention. FIG. 9 shows a process of constructing a database for image shift. Fig. 10 shows the operation of the afterimage reducing circuit shown in Fig.

8 to 10, the image shift control unit 22 of the residual image reduction circuit 20 includes a database 422, a blinking time sensing unit 421, and an ISE generation unit 224. [

In the database 422, frame data for which blinking occurs through a pre-process as shown in FIG. 9 is stored in advance. That is, in the database 422, the relationship between the change characteristic of the image and the eye blinking is stored in advance.

The blinking time detection unit 421 compares the input image with the database 422 and outputs the blinking time when the frame data of the input image is identical to any one of the frame data of the database 422 And outputs a blinking time detection signal (BTI) instructing it (S41, S42, S43)

The ISE generating unit 224 may generate the image shift enable signal ISE according to the blinking time sensing signal BTI from the blinking time sensing unit 421. In operation S45,

The image shift section 24 of the residual image reduction circuit 20 is substantially the same as that described in Fig.

The image shift controller 22 of FIG. 8 may further include a shift frequency controller 225 for controlling the image shift frequency by controlling the ISE generator 224.

When the blinking time detection signal BTI is input from the blinking time detection unit 421 to the ISE generation unit 224, the shift frequency adjustment unit 225 outputs the previous image shift enable signal The ISE generating unit 224 counts the time from the generation time of the current frame to the current frame and stops the generation of the image shift enable signal ISE when the count value is less than a preset reference value (S44) Here, the reference value may be set to a minimum time required for the OLED element to deteriorate due to the fixed pattern of the image.

Accordingly, the shift frequency adjuster 225 can prevent the image shift cycle from being shortened more than necessary due to a sudden change in brightness such as a flashlight image by giving a lower limit value to the image shift cycle.

11 to 13 show specific examples of the image shift to which the present invention is applied.

In the embodiment of the present invention, the image shift is to move the original normal position image upward, downward, leftward and rightward by a predetermined pixel (for example, one pixel or two pixels) FIG. 12 shows an example of shifting in the vertical direction (upward and downward), and FIG. 13 shows an example of shifting in the diagonal direction.

11A shows an original normal position image P1, an image P2 shifted by one pixel to the left, and an image P3 shifted by one pixel to the right, and FIG. And the image is shifted in the horizontal direction. The procedure of shifting the image in the horizontal direction shifts at least one or more pixels to the left and to the right based on the normal position image P1 as shown in FIG. 11 (B), and the normal position image P1 -> the left shifted image P2, -> normal position image (P1) -> right shifted image (P3) -> normal position image (P1).

12A shows an original normal position image P1 and an image P4 shifted by one pixel to the upper side and an image P5 shifted by one pixel to the lower side, ) Shows a cyclic algorithm that shifts the image in the vertical direction. The procedure for shifting the image in the vertical direction is to shift at least one or more pixels vertically on the basis of the normal position image P1 as shown in FIG. 12 (B), wherein the normal position image P1 -> the upper shifted image P4, -> normal position image (P1) -> lower shifted image (P5) -> normal position image (P1).

13, (A) shows an original normal position image P1, an image P6 shifted by one pixel to the left and the upper side, and an image P7 shifted by one pixel to the right and the lower side (B) shows a circulation algorithm for shifting the image in a diagonal direction. The procedure for shifting the image in the diagonal direction is to shift at least one or more pixels in the diagonal direction with reference to the normal position image P1 as shown in FIG. 13 (B), wherein the normal position image P1 -> left and upper shifted image (P6) -> normal position image P1 -> right and lower shifted image P7 -> normal position image P1.

Although not shown in the figure, at least one pixel is shifted upward, downward, left, and right based on the original normal position image P1, and the normal position image P1 -> the upper shifted image P4 -> normal Position image (P1) -> Lower shifted image (P5) -> Normal position image (P1) -> Left shifted image -> Normal position image (P1) -> Right shifted image (P3) -> And the normal position image P1.

As described above, the present invention implements a video shift at the moment when the user's eyes are blinked, which are derived through prediction or observation. The present invention minimizes side effects such as discomfort caused by the user's cognitive characteristics by preventing the user from perceiving the image shifting as much as possible by performing image shifting at the moment when the user's brain enters the rest.

In addition, since the present invention performs a video shift regardless of the attributes (still image, moving picture) of the image, it is possible to improve not only the deterioration in the still image and the fixed pattern but also the residual image due to the accumulation of deterioration such as the moving image logo and the subtitle .

In addition, since the present invention does not require a frame memory for motion analysis of an input image, it is effective to reduce manufacturing cost.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: Display panel 11: Timing controller
12: data driving circuit 13: gate driving circuit
20: afterimage reducing circuit 22: image shift control section
24: image shift section

Claims (16)

An image shift control unit for generating an image shift enable signal based on an eye blinking time at which a user's eyes blink; And
And an image shifting unit for shifting the input image displayed on the display panel by a predetermined pixel interval in a predetermined direction in accordance with the image shift enable signal. The method according to claim 1,
Wherein the image shift control unit comprises:
The input image signal for one frame is divided into a luminance component Y and chrominance components U and V and a luminance average value for the luminance component Y and a color average value for the chrominance components U and V are calculated An image analysis unit;
Determining a current frame as a shot change if the difference in luminance average value between the previous frame and the current frame is greater than a predetermined first threshold value and outputting a blinking time detection signal indicating the current blinking time, A time detection unit; And
And an ISE generator for generating the image shift enable signal according to the blinking time detection signal. 3. The method of claim 2,
Wherein the blinking time detection unit further determines a current frame as a shot change when the color average value difference between the previous frame and the current frame is greater than a predetermined second threshold value, And further outputs a time detection signal. 3. The method of claim 2,
Wherein the image shift control unit comprises:
Further comprising a speech analyzing unit for calculating a speech signal mean value by averaging speech signals of one frame input from the outside together with the input image,
Wherein the blinking time detection unit further determines the current frame as the shot change if the difference of the average value of the audio signal between the previous frame and the current frame is greater than a predetermined third threshold, And outputs the additional image signal. The method according to claim 1,
Wherein the image shift control unit comprises:
A camera unit positioned at one side of the display panel for capturing an image of the user and outputting eye tracking information;
A blinking time detection unit for outputting a blinking time detection signal indicating the iblinking time based on the eye tracking information; And
And an ISE generator for generating the image shift enable signal according to the blinking time detection signal. The method according to claim 1,
Wherein the image shift control unit comprises:
A database storing frame data in which blinking occurs;
Comparing the input image with the database and outputting a blinking time detection signal indicating the iblocking time when the frame data of the input image is identical to any one of frame data of the database A time detection unit; And
And an ISE generator for generating the image shift enable signal according to the blinking time detection signal. 7. The method according to any one of claims 2, 5 and 6,
The image shift controller may further include a shift frequency controller for controlling the image shift frequency by controlling the ISE generator,
The shift-
When the blinking time detection signal is input to the ISE generation unit, the time from the generation time of the previous image shift enable signal through the frame counter to the current frame is counted. If the count value is less than a preset reference value And controls the ISE generator to prevent the image shift enable signal from being generated. The method according to claim 1,
The image shifting unit
A display start point generating unit for generating a display start point in consideration of a predetermined pixel interval in the one direction when the image shift enable signal is input; And
And a first horizontal and vertical position modulator for modulating the input image data so that the input image is shifted in one direction in accordance with the display start point. The method according to claim 1,
The image shifting unit
A display start point generating unit for generating a display start point in consideration of a predetermined pixel interval in the one direction when the image shift enable signal is input; And
And a horizontal and vertical position modulator for modulating data display synchronization signals according to the display start point and outputting the input image data in synchronization with the modulated synchronization signals. Generating an image shift enable signal based on an eye blinking time at which a user's eyes blink; And
And shifting the input image displayed on the display panel by a predetermined pixel interval in a predetermined direction in accordance with the image shift enable signal. 11. The method of claim 10,
Wherein the step of generating the image shift enable signal comprises:
The input image signal for one frame is divided into a luminance component Y and chrominance components U and V and a luminance average value for the luminance component Y and a color average value for the chrominance components U and V are calculated ;
Determining a current frame as a shot change and outputting a blinking time detection signal indicating the iblinking time if the difference in average brightness value between the previous frame and the current frame is greater than a predetermined first threshold value; And
And generating the image shift enable signal according to the blinking time detection signal. 12. The method of claim 11,
The blinking time detection signal may further include a step of determining a current frame as a shot change if the color average value difference between the previous frame and the current frame is greater than a predetermined second threshold value, And further outputting a blinking time detection signal indicating a time. 12. The method of claim 11,
Wherein the step of generating the image shift enable signal comprises:
Further comprising the step of calculating a mean value of the audio signals by averaging the audio signals of one frame input from the outside together with the input video,
The blinking time detection signal may further include a step of determining the current frame as the shot change if the difference between the average value of the audio signal between the previous frame and the current frame is greater than a predetermined third threshold value, And a signal for detecting a linking time is additionally output. 11. The method of claim 10,
Wherein the step of generating the image shift enable signal comprises:
Capturing an eye of the user using a camera unit located at one side of the display panel and outputting eye tracking information;
Outputting a blinking time detection signal indicating the iblinking time based on the eye tracking information; And
And generating the image shift enable signal according to the blinking time detection signal. 11. The method of claim 10,
Wherein the step of generating the image shift enable signal comprises:
Providing a database in which frame data in which eye blinking occurs is stored;
Comparing the input image with the database and outputting a blinking time detection signal indicating the blinking time if the frame data of the input image is identical to any one of frame data of the database; And
And generating the image shift enable signal according to the blinking time detection signal. The method according to any one of claims 11, 14 and 15,
The time counting unit counts the time from generation of the previous image shift enable signal through the frame counter to the current frame when the blinking time detection signal is input, and when the count value is less than a preset reference value, And a shift frequency adjusting step of adjusting a shift frequency of the shift register so that a signal is not generated.

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