KR102237388B1 - Display device - Google Patents

Abstract

In the present embodiments, when a specific white subpixel located inside a pixel is expressed as a defect such as a dark spot, the luminance of the subpixels of other colors is lowered and the luminance of the subpixels above and below the white subpixel of the dark spot is increased to compensate for the defect. Provides a display device.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device that displays an image.

As the information society develops, demands for display devices for displaying images are increasing in various forms, and liquid crystal display devices (LCDs), plasma display devices, and organic light-emitting display devices ( Various types of display devices such as OLED: Organic Light Emitting Display Device) are being used.

Meanwhile, in order to provide high resolution and complex functions these days, a pixel structure of a display panel of a display device is becoming increasingly complex. As described above, as the pixel structure becomes more complex, it is advantageous in terms of providing high resolution and advanced functions, but the possibility of pixel defects may increase.

Therefore, there is a need to compensate for pixel defects and not cause additional problems.

The object of the present embodiments is, according to the present embodiments, when a specific white subpixel of a pixel is expressed as a defect, when a white subpixel of a pixel is expressed as a defect such as a dark spot, the luminance of the subpixels of other colors is lowered and The purpose of the present invention is to provide a display device in which adjacent subpixels do not look too bright while compensating for defects by increasing the luminance of subpixels above and below the white subpixel of.

In one embodiment, a display panel in which a plurality of data lines and a plurality of gate lines are formed, and a plurality of pixels are arranged in a matrix form, a data driver driving a plurality of data lines, and a gate driving a plurality of gate lines A display device including a driver and a timing controller that controls the data driver and the gate driver may be provided. At this time, if the white first subpixel among the subpixels constituting the first pixel of the i-th row j column (i, j is a natural number greater than 0) is expressed as defective, the ith row jn column (n is a larger than 0) Of the subpixels constituting the second pixel of the natural number), the white first subpixel of the white second subpixel in the i-th row that is the same as the white first subpixel and the subpixels constituting the third pixel in the i-th row j+n column The luminance of at least one of the white third subpixels in the i-th row that is the same as the subpixel may be increased.

According to the present embodiments as described above, when a specific subpixel located inside a pixel is expressed as a defect, when a white subpixel of a pixel is expressed as a defect such as a dark spot, the luminance of the subpixels of other colors is lowered. By increasing the luminance of subpixels above and below a defective white subpixel, it is possible to compensate for defects and prevent adjacent subpixels from appearing too brightly. Through this, the visibility of the display device can be improved.

1 is a schematic system configuration diagram of a display device according to exemplary embodiments.
2A and 2B illustrate a display device according to an exemplary embodiment including a display panel including a plurality of pixels composed of four subpixels.
3A and 3B illustrate a display device according to another exemplary embodiment including a display panel including a plurality of pixels composed of four subpixels.
4 is a diagram illustrating a configuration of compensating for a defect by adjusting the luminance of a display panel of the display device 100 according to exemplary embodiments.
5 is a panel configuration diagram of a display panel composed of RWGB subpixels.
FIG. 6 shows a general method of implementing white by using other subpixels of a specific pixel when a white subpixel arranged in a second subpixel of a specific pixel is expressed as a dark spot.
7A to 10 show a display according to another embodiment in which white subpixels arranged in a second subpixel of a specific pixel are expressed as dark spots, using other subpixels of a specific pixel and surrounding pixels to implement white. The display panel of the device is shown.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to elements of each drawing, the same elements may have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, the detailed description may be omitted.

In addition, in describing the constituent elements of the present invention, terms such as first, second, A, B, (a) and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but other components between each component It should be understood that "interposed" or that each component may be "connected", "coupled" or "connected" through other components.

1 is a schematic system configuration diagram of a display device 100 according to exemplary embodiments.

Referring to FIG. 1, in the display device 100 according to embodiments, n gate lines GL1, ..., GLn, n: natural numbers are formed in a first direction (eg, a horizontal direction), and m The display panel 110 is formed in a second direction (eg, vertical direction) in which the number of data lines DL1, ..., DLm, m: natural numbers cross the first direction, and m data lines DL1, .. A data driver 120 for driving ., DLm), a gate driver 130 for sequentially driving n gate lines GL1, ..., GLn, a data driver 120 and a gate driver 130 It includes a timing controller 140 and the like to control.

In the display panel 110, a sub-pixel (SP) is formed in a matrix form at each point where one data line and one or more gate lines cross each other.

By such a plurality of subpixels, a plurality of pixels (P) are disposed on the display panel 110 in a matrix form.

The timing controller 140 starts scanning according to the timing implemented in each frame, converts the image data input from the interface according to the data signal format used by the data driver 120 to convert the converted image data (Data). It outputs and controls the data drive at the appropriate time according to the scan.

The timing controller 140 receives various control signals such as a data control signal (DCS) and a gate control signal (GCS) in order to control the data driver 120 and the gate driver 130. Can be printed.

The gate driver 130 sequentially supplies an on voltage or an off voltage scan signal to the n gate lines GL1, ..., GLn under the control of the timing controller 140 The n gate lines GL1, ..., GLn are sequentially driven.

The data driver 120 stores the input image data in a memory (not shown) under the control of the timing controller 140, and when a specific gate line is opened, the corresponding image data Data is stored in an analog form. By converting the data voltage Vdata and supplying it to m data lines DL1, ..., DLm, m data lines DL1, ..., DLm are driven.

The data driver 120 may include a plurality of data driving integrated circuits (Data Driver ICs, also referred to as source driver ICs), and such a plurality of data driving integrated circuits include tape automated bonding (TAB). : Tape Automated Bonding) or chip-on-glass (COG) is connected to the bonding pad of the display panel 110, or may be formed directly on the display panel 110. In some cases, the display panel ( 110).

The gate driver 130 may be positioned on only one side of the display panel 110 as shown in FIG. 1, or may be divided into two and positioned on both sides of the display panel 110, depending on the driving method.

In addition, the gate driver 130 may include a plurality of gate driver ICs, such as a plurality of gate driving integrated circuits, a tape automated bonding (TAB) method or a chip-on. It may be connected to a bonding pad of the display panel 110 in a glass (COG) method, or implemented in a GIP (Gate In Panel) type to be formed directly on the display panel 110. In some cases, the display panel It may be formed by being integrated in (110).

The display device 100 illustrated in FIG. 1 is, for example, a liquid crystal display device (LCD), a plasma display device, and an organic light emitting display device (OLED). ), etc.

Circuit elements such as transistors and capacitors are formed in each subpixel formed in the above-described display panel 110 according to the type of the display device 100. For example, when the display panel 110 is an organic light emitting display panel, circuit elements such as an organic light emitting diode, two or more transistors, one or more capacitors, and a compensation circuit are formed in each subpixel.

When one of the subpixels constituting one pixel is expressed as a defect, it becomes more noticeable to the viewer due to the defect of the subpixel. In particular, the configuration of the subpixels constituting the pixel, the type of the subpixel in which the defect is implemented, and the spatial arrangement of the subpixels make the viewer stand out.

Accordingly, the present embodiments provide a display device and a driving method thereof capable of improving the completeness of the defect compensation by performing defect compensation by adjusting the luminance of pixels in which defects are implemented and surrounding pixels.

First, a display device of a display panel including a plurality of pixels each composed of RGB subpixels will be briefly described with reference to FIG. 2, and then, a display panel including a plurality of pixels each composed of RWGB subpixels. The display device of will be briefly described.

2 illustrates a display device according to an exemplary embodiment including a display panel including a plurality of pixels composed of four subpixels. 3 illustrates a display device according to another exemplary embodiment including a display panel including a plurality of pixels each composed of four subpixels.

Pixels (Pij, i = 1, 2, ..., j = 1, 2, ...) of i rows and j columns are arranged in a matrix form on the display panel 110.

Each pixel Pij may be composed of four subpixels as shown in FIGS. 2A to 3B. Each pixel Pij may be composed of four subpixels c1, c2, c3, and W including a white subpixel W.

2A to 3B, when each pixel Pij is composed of four subpixels c1, c2, c3, W, a white subpixel W and three subpixels c1, c2, c3) may be one of 24 combinations of a red sub-pixel (R), a green sub-pixel (G), and a blue sub-pixel (B). Since the four sub-pixels include the white sub-pixel W to form a pixel, the lifetime of the display device of the display device 100 can be improved and power consumption can be reduced.

At this time, one of the subpixels constituting the specific first pixel, which is located inside, may be expressed as a defect. For example, as shown in Figs. 2A to 3B, a white subpixel, which is the second subpixel or the third subpixel among the four subpixels (c1, c2, c3, W) constituting the M pixel, is expressed as a defect. Can be. In this case, the defects of the subpixels may vary. In this specification, the defects of the subpixels are exemplarily described as dark spots (including weak dark spots) of the subpixels, but the present invention is not limited thereto.

For example, as shown in Figs. 2A and 2B, a white subpixel (W) located in the second of the subpixels (c1, c2, c3, W) constituting the M pixel in the Mth column is expressed as a defect. In this case, the white subpixel (W) located in the second of the subpixels constituting the (M-1) pixel in the (M-1) column and the (M+1) pixel in the (M+1) column The luminance of one or two of the white subpixels W positioned at the second among the subpixels may be increased. In other words, if the white subpixels (W) of the M pixels in the Mth column are expressed as defective, the white subpixels (W) of the upper and lower pixels are raised to average the luminance of the white subpixels (W) of the M pixels in the Mth column that are defective. Can be raised.

In addition, a defect of the white subpixel W of the M pixel of the Mth column may be compensated for with the remaining subpixels c1, c2, and c3 constituting the M pixel of the Mth column. In other words, by increasing the luminance of the remaining subpixels (c1, c2, c3) constituting the M pixel in the Mth column, for example, red, green, and blue subpixels, the white subpixel (W) of the M pixel in the Mth column is You can compensate for the defect. As shown in FIG. 2B, when four subpixels are driven according to the target color coordinate (color temperature) and the efficiency of the display device (OLED), a specific subpixel may not be driven. For example, when the color temperature of a pixel is high, most of the blue sub-pixels (blue display device) are turned on, and the sub-pixel to be turned off among the red sub-pixels (red display device) and green sub-pixels (green display device) can be determined through RGB data calculation. have. As described above, when one of the two adjacent subpixels and the white first subpixel constituting the M pixel in the Mth column is not driven, the white first subpixel is expressed as a defect. It can be driven to compensate for defects. In this case, the luminance of the subpixel adjacent to the white first subpixel driven to compensate may be lowered.

As another example, as shown in Figs. 3A and 3B, if the white subpixel W located at the third of the subpixels c1, c2, c3, and W constituting the M pixel is expressed as a defect Among the subpixels constituting the (M-1) pixel in the (M-1) column, the white subpixel (W) positioned at the third position and the subpixels constituting the (M+1) pixel in the (M+1) column It is possible to increase the luminance of one or two of the white sub-pixels W positioned at the third of them. When the white subpixel (W) of the M pixel in the Mth column is expressed as a defect, the white subpixel (W) of the upper and lower pixels is raised to increase the average luminance of the white subpixel (W) of the M pixel in the Mth column that is defective. I can make it.

At this time, as described above, a defect of the white subpixel W of the M pixel of the Mth column may be compensated for with the remaining subpixels c1, c2, and c3 constituting the M pixel of the Mth column. At this time, as shown in FIG. 3B, one of the two subpixels adjacent to the white first subpixel constituting the M pixel in the Mth column is not driven according to the target color coordinate (color temperature) and the efficiency of the display device (OLED). In the case where the white first sub-pixel is expressed as a defect, it may be driven to compensate for the defect of the white first sub-pixel. In this case, the luminance of the subpixel adjacent to the white first subpixel driven to compensate may be lowered.

In general, when a white first subpixel among the subpixels constituting the first pixel of the i-th row j column (i, j is a natural number greater than 0) is expressed as defective, the ith row jn column (n is less than 0). Among the subpixels constituting the second pixel of a large natural number), the white second subpixel of the second subpixel in the i-th row that is the same as the white first subpixel and the subpixels constituting the third pixel in the i-th row j+n column The luminance of at least one of the third sub-pixels in the i-th row that is the same as the first sub-pixel may be increased.

In this case, the defect of the first subpixel may be compensated for with one or more other subpixels constituting the first pixel in the ith row j column. For example, red, green, and blue sub-pixels constituting the first pixel in the i-th column j may compensate for the defect of the white first sub-pixel.

One of the two subpixels adjacent to the white first subpixel constituting the first pixel in the ith row j column is not driven according to the target color coordinate (color temperature) and the efficiency of the display device (OLED), When one sub-pixel is expressed as a defect, it may be driven to compensate for the defect of the white first sub-pixel. In this case, the luminance of the subpixel adjacent to the white first subpixel driven to compensate may be lowered.

In the case of compensating for the defect by adjusting the luminance of the pixel in which the above-described defect is implemented and the surrounding pixels, a configuration necessary for this will be briefly described with reference to FIG. 4.

4 is a diagram illustrating a configuration of compensating for a defect by adjusting the luminance of a display panel of the display device 100 according to exemplary embodiments.

Referring to FIG. 4, the display device 100 according to exemplary embodiments receives (RGB) ij input data for each pixel Pij in the i-th row j column to compensate for defects, and converts (RWGB) ij data into data. A data conversion unit 410 that converts and receives the converted (RWGB)ij data and receives the converted (RWGB)ij data, based on the defect information, and (R' W'G'of the defective pixel and surrounding pixels shown in FIGS. 2A to 3B). And a subpixel processing unit 420 that outputs B′)ij data to the data driver 120.

The data conversion unit 410 and the subpixel processing unit 420 illustrated in FIG. 4 may be included in the timing controller 140 or may be included outside the timing controller 140. In addition, although FIG. 4 shows that the data conversion unit 410 and the subpixel processing unit 420 are implemented by dividing into two components, they may be implemented as one component. In this case, a component in which the data conversion unit 410 and the subpixel processing unit 420 are integrated receives (RGB)ij input data through hardware or software implementation, G'B')ij data may be output to the data driver 120.

As described above, as shown in FIGS. 2A to 3B, pixels in row i and j columns (Pij, i = 1, 2, ..., j) are composed of four subpixels (c1, c2, c3, W). = 1, 2, ...) will be described in detail in embodiments in which the display panel 110 in which the display panel 110 is arranged in a matrix form is exemplified and compensates for the defect by adjusting the luminance of the pixels in which the defect is implemented and the surrounding pixels.

5 is a panel configuration diagram of a display panel composed of RWGB subpixels.

Referring to FIG. 5, the display panel 110 of the display device 100 illustrated in FIG. 1 may be a display panel in which pixels formed in the order of red, white, green, and blue subpixels are arranged in a matrix form. As described above with reference to FIGS. 2A to 3B, when each pixel is composed of four subpixels c1, c2, c3, and W, 24 combinations are possible. At this time, since the white subpixel is disposed in the second or third subpixel in consideration of color coordinate misalignment (light leakage), text readability, and pixel aperture ratio, it is possible to increase the visibility of the pixel and improve the white balance. The remaining subpixels may be arranged in six combinations on the other. As illustrated in FIG. 5, a display panel 110 in which white subpixels are disposed in a second subpixel and red, green, and blue subpixels are disposed in the remaining subpixels will be described as an example.

At this time, as shown in FIG. 6, when the white subpixel arranged in the second subpixel of the M pixel in the Mth row N column is expressed as a dark spot, white may be implemented by using the red, green, and blue subpixels of the M pixel. . Since white is realized by three red, green, and blue subpixels generated during initial gamma setting, the color coordinates and luminance are theoretically the same as when dark spots of white subpixels are not expressed by driving RWGB subpixels including white. can do.

In this case, even if the RGB subpixels are driven to compensate for dark spots of the white subpixels in a spatial arrangement, they may have characteristics that are easy to be recognized by the human eye. In other words, when the RWBG subpixels are arranged in the order, the visibility of dark spots of the white subpixels may be improved.

In addition, as shown in FIG. 6, when a white subpixel arranged in the second subpixel of the M pixel in the Mth row N column is expressed as a dark spot, when implementing white using red, green, and blue subpixels, the red adjacent to the dark spot Or, a phenomenon that looks brighter in green may occur. In particular, depending on the target color coordinate (color temperature) and the efficiency of the display device (OLED), one of the subpixels adjacent to the white subpixel disposed in the second subpixel of the M pixel pixel in the Mth column, for example, a white subpixel in FIG. The red sub-pixel adjacent to the left side of is not driven, but the white sub-pixel may be driven to compensate for the dark spot of the white sub-pixel because the white sub-pixel is expressed as a defect. At this time, there may be a problem in that the red subpixel whose luminance has been increased for compensation appears too red (that is, reddish) due to the spatial arrangement adjacent to the subpixel of the dark spot and the subpixels that are not driven.

In the following embodiments, when a white subpixel is expressed as a dark spot, defect compensation driving may be performed using upper/lower pixels such as adjustment of luminance or gamma value in addition to other subpixels included in the same pixel as the corresponding white subpixel of the dark spot. When using upper/lower pixels such as adjusting luminance or gamma value other than other subpixels included in the same pixel as the corresponding white subpixel of the dark point, the color coordinate of the defective pixel according to the upper and lower luminance of each subpixel is optically adjusted to match the target value. Compensate.

Hereinafter, with reference to FIGS. 7A to 10, when the second white subpixel of the pixel is expressed as a dark spot, the display panels of the display device according to the exemplary embodiments in which the visibility is improved and subpixels adjacent to the dark spot are not brighter are described in detail. Explain.

As shown in FIG. 7A, each of the plurality of pixels of the display panel 110 is configured in the order of red, white, green, and blue subpixels. In this case, when the four subpixels are driven according to the target color coordinate (color temperature) and the efficiency of the display device (OLED), a specific subpixel may not be driven. For example, when the color temperature of a pixel is high, most of the blue sub-pixels (blue display device) are turned on, and the sub-pixel to be turned off among the red sub-pixels (red display device) and green sub-pixels (green display device) can be determined through RGB data calculation. have. In FIG. 7, a case in which the red subpixel is not driven is exemplarily described, but the present invention is not limited thereto, and all subpixels may be driven.

At this time, if the white subpixel located in the second subpixel among the subpixels constituting the first pixel (M pixel) is expressed as a dark spot, as shown in FIG. 7A, (M-1) in the (M-1) column The white subpixel (W) located at the second among subpixels constituting the pixel and the white subpixel (W) located at the second of the subpixels constituting the (M+1) pixel in the (M+1) column. ) Increase the luminance of all 710. In other words, if the white subpixels (W) of the M pixels in the Mth column are expressed as defective, the white subpixels (W) of the upper and lower pixels are raised to average the luminance of the white subpixels (W) of the M pixels in the Mth column that are defective. Raises.

In addition, a defect of the white subpixel W of the M pixel of the Mth column may be compensated for with the remaining subpixels 700 constituting the M pixel of the Mth column. At this time, one of the subpixels adjacent to the white subpixel disposed in the second subpixel of the M pixel pixel in the Mth column according to the target color coordinate (color temperature) and the efficiency of the display device (OLED), for example, a white subpixel in FIG. The red sub-pixel adjacent to the left side of is not driven, but the white sub-pixel is expressed as a defect and can be driven to compensate for the dark spot of the white sub-pixel. At this time, the luminance of the red sub-pixel is lowered so that the red sub-pixel whose luminance is increased for compensation does not appear red more because of the spatial arrangement adjacent to the white sub-pixel of the dark spot and the sub-pixels that are not driven. In this case, the luminance of green and blue subpixels other than the red subpixels may also be lowered at the same ratio to achieve a white balance.

When the luminance of the red, green, and blue subpixels 700 is lowered and the luminance of the subpixels 710 above and below the dark-point white subpixel is increased, the luminance of the pixel adjacent to the pixel in the pixel including the defective white subpixel Because of compensating, the red component that affects the red subpixel is indicated by a dotted circle in FIG. 7B. At this time, the luminance of the subpixels 710 above and below the white subpixel of the dark spot is increased by the lowered luminance of the red, green, and blue subpixels 700 so that the red is not seen too bright (i.e., not reddish) while compensating for the dark spot. can do.

As shown in FIG. 8, each of the plurality of pixels of the display panel 110 is configured in the order of red, white, green, and blue subpixels. In FIG. 8, the red subpixel is driven, and the white subpixel disposed in the second subpixel of the M pixel pixel in the Mth column and the green subpixel adjacent to the right are driven according to the target color coordinate (color temperature) and the efficiency of the display device (OLED). If not, the white sub-pixel appears as a dark spot, and can be driven to compensate for the dark spot of the white sub-pixel. At this time, the luminance of the red subpixel is lowered so that the green subpixel whose luminance has been increased for compensation does not appear red more because of the spatial arrangement adjacent to the white subpixel of the dark spot and the non-driving subpixel. In this case, the luminance of green and blue subpixels other than the red subpixels may also be lowered at the same ratio to achieve a white balance.

When the luminance of the red, green, and blue subpixels 700 is lowered and the luminance of the subpixels 710 above and below the dark-point white subpixel is increased, the luminance of the pixel adjacent to the pixel in the pixel including the defective white subpixel Because of compensating, the red component that affects the red subpixel is indicated by a dotted circle in FIG. 7B. The brightness of the subpixels 810 above and below the white subpixel of the dark spot is increased by the lowered luminance of the red, green, and blue subpixels 800 to compensate for the dark spot and prevent the green from appearing too bright (i.e., not greenish). I can.

The subpixels adjacent to the white subpixels expressed as dark spots are not limited to the red or green subpixels as shown in FIGS. 7A and 8A, and various combinations as described with reference to FIGS. 2A to 3B are possible.

On the other hand, as shown in FIGS. 9 and 10, by increasing the luminance of the subpixels 910 above and below the white subpixel of the dark spot by the lower luminance of the red, green, and blue subpixels 900, When the subpixel is not to be viewed too brightly, the number of subpixels above and below the white subpixel may be two or more. When the second white subpixel of the M pixel in column M is expressed as a dark spot, the (M-1) pixel in column (M-1), the (M-2) pixel in column (M-2), and (M+1) The luminance of the pixel and the four subpixels 910 of the (M+2) pixel in the (M+2)th column may be increased.

The number of the upper and lower subpixels 910 of the white subpixel of the dark point to compensate for the dark point is shown as 4 in FIG. 9, but may be more than 4 or less than 4. For example, the dark spot may be compensated only by subpixels above the white subpixel of the dark spot, or only the subpixels below the dark spot. Also, the number of upper subpixels and the number of lower subpixels for compensating the white subpixels of the dark spot may be different. For example, a white subpixel of a dark spot may be compensated for with two upper subpixels and one lower subpixel.

In this case, the luminance of the two or more upper/lower subpixels may increase significantly as the subpixel adjacent to the white subpixel of the dark spot increases, and the luminance decreases as the distance increases. Through this, when the luminance of the white sub-pixels above and below the white sub-pixel of the dark spot is increased, it is possible to prevent it from appearing as a weak bright spot.

As shown in FIG. 10, when the white subpixel is expressed as a defect while driving all the subpixels, the luminance of the red subpixel located to the left of the white subpixel of the dark spot is increased to compensate for the dark spot of the white subpixel. The luminance of the red subpixels above and below the red subpixel may also be increased. In this case, the red subpixel located to the left of the white subpixel of the dark spot and the same as the subpixel adjacent to the white subpixel of the dark spot in the two or more upper/lower subpixels increase the luminance significantly and increase the luminance smaller as the distance increases. The luminance can be greatly increased as the adjacent upper and lower red subpixels are, and the luminance can be increased smaller as the distance is gradually increased. Through this, the luminance of the red subpixels as well as the upper and lower white subpixels may be increased, thereby reducing the redish visibility of the defective white subpixels.

In this case, in the embodiments described with reference to FIGS. 7 to 10, in order to compensate for the defective sub-pixel, a color coordinate compensation algorithm may be applied by increasing the luminance of the sub-pixels above and below the defective sub-pixel. Since a color coordinate compensation algorithm is applied by increasing the luminance of subpixels above and below the defective subpixel, the color coordinate of the defective pixel according to the upper and lower luminance of each subpixel is optically compensated so as to match the target value.

When a white subpixel located at the second or third position of a specific pixel is expressed as a dark spot with reference to FIGS. 7 to 10, the subpixel processing unit 420 described with reference to FIG. 4 processes the input (RWGB)ij data. (R' W'G'B') ij data is output to the data driver 120. Therefore, when white subpixels are expressed as dark spots, the luminance of the first to third pixels is controlled through (R' W'G'B') ij data for dark point compensation, not the basic (R W G B) ij data.

In the above-described embodiments, it has been described that the white subpixel is located inside a specific pixel, but the present invention is not limited thereto and may be located outside the specific pixel.

In addition, in the above-described embodiments, a dark spot, which is one of the defects, has been mainly described as an example, but the present invention is not limited thereto, and the present invention can be applied to any type of defect requiring luminance compensation.

According to the above-described embodiments, when a specific white subpixel of a pixel is expressed as a defect such as a dark spot, the luminance of subpixels of other colors is lowered and the luminance of the subpixels above and below the defective white subpixel is increased to compensate for the defect and to the adjacent subpixels. You can make it look too bright. Through this, the visibility of the display device can be improved.

The description above and the accompanying drawings are merely illustrative of the technical idea of the present invention, and those of ordinary skill in the technical field to which the present invention pertains, combinations of configurations within the scope not departing from the essential characteristics of the present invention. Various modifications and variations, such as separation, substitution, and alteration, will be possible. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: display device
110: display panel
120: data driver
130: gate driver
140: timing controller
410: data conversion unit
420: subpixel processing unit

Claims (10)

A plurality of data lines and a plurality of gate lines are formed, and red, white, green, and blue subpixels are arranged in the same order in a row direction, but the red subpixel and the white subpixel are adjacent to each other. A display panel in which pixels are arranged in a matrix form;
A data driver driving the plurality of data lines;
A gate driver driving the plurality of gate lines; And
Including a timing controller for controlling the data driver and the gate driver,
If the first white subpixel is defective among the subpixels constituting the first pixel in the ith row j column (i, j is a natural number greater than 0), the inth row j column (n is a natural number greater than 0) ) Of the subpixels constituting the second pixel of the white first subpixel in a column direction and arranged in the same column j and a sub pixel constituting the third pixel in the i+nth row j column And increasing the luminance of at least one of the third white sub-pixels, which are adjacent to the first white sub-pixel in a column direction and are arranged in the same j-th column. The method of claim 1,
The display device according to claim 1, wherein the defect of the white first sub-pixel is compensated by at least one sub-pixel other than the white first sub-pixel in which the defect is expressed in the first pixel of the i-th row j column. The method of claim 1,
The display device, wherein the defect is a dark spot. The method of claim 1,
The display device that the white first subpixel expressed as a defect is a second or third subpixel of the first pixel. delete delete The method of claim 2,
A display device comprising lowering the luminance of one or more other subpixels driven to compensate. The method of claim 1,
And lowering the luminance of the red first sub-pixel adjacent to the white first sub-pixel in which a defect is expressed among sub-pixels constituting the first pixel. The method of claim 1,
The white subpixel that increases the luminance
Along the in-th row j column (n is a natural number greater than 0), a plurality of white sub-pixels arranged in the same column direction as the white first sub-pixel in which defects are expressed, and the i+n-th row j column a plurality of display devices, characterized in that the white sub-pixel arranged in the same column direction as the poor expression the white first sub-pixel. The method of claim 9,
The plurality of white subpixels that increase the luminance are
The display device according to claim 1, wherein, as the subpixels adjacent in the column direction to the white first subpixel in which defects are expressed, the luminance is significantly increased.

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