Display device

Abstract

A display device is provided. The display device includes a display panel, a driving controller, and a data driver. The display panel is configured to display an image based on input image data. The driving controller is configured to determine whether the input image data includes a display quality degradation pattern. The driving controller is configured to determine a first compensation value for compensating a first region disposed at a first side of the main region and a second compensation value for compensating a second region disposed at a second side of the main region opposite to the first side of the main region according to the position of the main region of the display quality degradation pattern. The data driver is configured to apply data voltages using the first compensation value and the second compensation value to the display panel.

Description

Technical Field

[0001] Exemplary embodiments of the inventive concept relate to a display device and a method of driving the display device. More particularly, exemplary embodiments of the inventive concept relate to a display device that determines a crosstalk generation pattern and compensates for crosstalk, and a method of driving the display device. Background Art

[0002] Generally, a display device includes a display panel and a display panel driver. The display panel includes a plurality of gate lines, a plurality of data lines, a plurality of emission lines, and a plurality of pixels. The display panel driver includes a gate driver, a data driver, and a driving controller. The gate driver outputs a gate signal to the gate lines. The data driver outputs a data voltage to the data lines. The driving controller controls the gate driver, the data driver, and the emission driver. In addition, the display panel driver may further include a power voltage generator that applies a power voltage and an initialization voltage to the display panel.

[0003] When the display panel displays a specific pattern, a part of the display panel may exhibit a brightness smaller than a target brightness so that crosstalk can be shown to a user. Summary of the Invention

[0004] According to an exemplary embodiment of the inventive concept, a display device includes a display panel, a driving controller, and a data driver. The display panel is configured to display an image based on input image data. The driving controller is configured to determine whether the input image data includes a display quality degradation pattern. The driving controller is configured to determine a first compensation value for compensating a first region disposed at a first side of a main region and a second compensation value for compensating a second region disposed at a second side of the main region opposite to the first side according to a position of the main region of the display quality degradation pattern. The data driver is configured to apply data voltages using the first compensation value and the second compensation value to the display panel.

[0005] In an exemplary embodiment of the inventive concept, when a size of the first region is larger than a size of the second region, the first compensation value may be smaller than the second compensation value.

[0006] In an exemplary embodiment of the inventive concept, initial compensation values corresponding to the first region and the second region may be stored in a look-up table. The first compensation value may be determined by multiplying an initial compensation value by a first gain determined according to the position of the main region. The second compensation value may be determined by multiplying an initial compensation value by a second gain determined according to the position of the main region.

[0007] In an exemplary embodiment of the inventive concept, when the main region is disposed closer to a first end of the display panel in the first side than a second end of the display panel in the second side, the first gain may be greater than one, and the second gain may be less than one.

[0008] In an exemplary embodiment of the inventive concept, a first initial compensation value corresponding to a first region may be stored in a first look-up table. A second initial compensation value corresponding to a second region may be stored in a second look-up table.

[0009] In an exemplary embodiment of the inventive concept, a first compensation value may be determined by multiplying a first gain determined according to the position of a main region by the first initial compensation value. A second compensation value may be determined by multiplying a second gain determined according to the position of the main region by the second initial compensation value.

[0010] In an exemplary embodiment of the inventive concept, a driving controller may be configured to store a first threshold gray value for determining a main region and a second threshold gray value for determining a background region other than the main region.

[0011] In an exemplary embodiment of the inventive concept, when the gray value of the main region is greater than the first threshold gray value and the gray value of the background region is less than the second threshold gray value, the driving controller may be configured to determine that the input image data includes a display quality degradation pattern.

[0012] In an exemplary embodiment of the inventive concept, when the difference between a first gray value corresponding to the main region and a second gray value corresponding to a background region other than the main region is greater than a threshold gray value difference, the driving controller may be configured to determine that the input image data includes a display quality degradation pattern.

[0013] In an exemplary embodiment of the inventive concept, the driving controller may be configured to determine a horizontal starting point of the main region, a horizontal width of the main region, a vertical starting point of the main region, and a vertical width of the main region.

[0014] In an exemplary embodiment of the inventive concept, the driving controller may be configured to determine the first compensation value and the second compensation value according to the horizontal width of the main region.

[0015] In an exemplary embodiment of the inventive concept, when the horizontal width of the main region increases, the first compensation value and the second compensation value may increase.

[0016] In an exemplary embodiment of the inventive concept, the first compensation value and the second compensation value may decrease from the vertical starting point to the vertical ending point of the main region of the display quality degradation pattern.

[0017] According to an exemplary embodiment of the inventive concept, a method of driving a display device includes: determining that input image data includes a display quality degradation pattern including a main region and a background region using a first threshold gray value for determining the main region and a second threshold gray value for determining a background region other than the main region; determining a horizontal starting point of the main region and a horizontal width of the main region; determining a first compensation value for compensating a first region disposed at a first side of the main region and a second compensation value for compensating a second region disposed at a second side of the main region opposite to the first side of the main region based on the horizontal starting point of the main region and the horizontal width of the main region; and applying data voltages using the first compensation value and the second compensation value to a display panel. When the horizontal width of the main region increases, the first compensation value and the second compensation value increase. Sizes of the first region and the second region are determined using the horizontal starting point of the main region. When the size of the first region decreases, the size of the second region increases, and when the size of the first region increases, the size of the second region decreases. When the size of the first region is smaller than the size of the second region, the first compensation value is greater than the second compensation value. When the size of the first region is greater than the size of the second region, the first compensation value is less than the second compensation value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features of the inventive concept will become more apparent by describing in detail exemplary embodiments of the present disclosure with reference to the drawings.

[0019] Figure 1 is a block diagram showing a display device according to an exemplary embodiment of the inventive concept.

[0020] Figure 2 is a circuit diagram of a pixel of a display panel showing an exemplary embodiment of the inventive concept Figure 1 thereof.

[0021] Figure 3 is a conceptual diagram showing a display quality degradation pattern displayed on a display panel showing an exemplary embodiment of the inventive concept Figure 1 thereof.

[0022] Figure 4 is a timing diagram showing an example level of an initialization voltage of a display quality degradation pattern showing an exemplary embodiment of the inventive concept Figure 3 thereof.

[0023] Figure 5 is a timing diagram showing an example level of an initialization voltage of a display quality degradation pattern showing an exemplary embodiment of the inventive concept Figure 3 thereof.

[0024] Figure 6is a conceptual diagram showing a first threshold gray value and a second threshold gray value stored in a driving controller of Figure 1 to determine a display quality degradation pattern according to an exemplary embodiment of the inventive concept.

[0025] Figure 7 is a conceptual diagram showing a method for determining a horizontal starting point, a horizontal width, a vertical starting point, and a vertical width of a main region of a display quality degradation pattern by a driving controller of Figure 1 according to an exemplary embodiment of the inventive concept.

[0026] Figure 8 is a conceptual diagram showing a method for determining a first compensation value and a second compensation value by a driving controller of Figure 1 according to an exemplary embodiment of the inventive concept.

[0027] Figure 9 is a conceptual diagram showing a display quality degradation pattern displayed on a display panel of Figure 1 according to an exemplary embodiment of the inventive concept.

[0028] Figure 10 is a conceptual diagram showing a display quality degradation pattern displayed on a display panel of Figure 1 according to an exemplary embodiment of the inventive concept.

[0029] Figure 11 is a conceptual diagram showing a display quality degradation pattern displayed on a display panel of Figure 1 according to an exemplary embodiment of the inventive concept.

[0030] Figure 12 and Figure 13 is a conceptual diagram showing a method for determining a first compensation value and a second compensation value by a driving controller of a display device according to an exemplary embodiment of the inventive concept. Detailed Description

[0031] Exemplary embodiments of the inventive concept provide a display device that determines a crosstalk generation pattern and compensates for crosstalk.

[0032] Exemplary embodiments of the inventive concept also provide a method for driving the display device.

[0033] Hereinafter, exemplary embodiments of the inventive concept will be explained in detail with reference to the accompanying drawings. Throughout this application, like reference numerals may refer to like elements.

[0034] Figure 1 is a block diagram of a display device according to an exemplary embodiment of the inventive concept.

[0035] Reference Figure 1 The display device includes a display panel 100 and a display panel driver. The display panel driver includes a driving controller 200, a gate driver 300, a gamma reference voltage generator 400, and a data driver 500. The display panel driver may further include a transmitting driver 600. The display panel driver may further include a power voltage generator 700.

[0036] For example, the driving controller 200 and the data driver 500 may be integrally formed. For example, the driving controller 200, the data driver 500, and the power voltage generator 700 may be integrally formed. For example, the driving controller 200, the gamma reference voltage generator 400, and the data driver 500 may be integrally formed. For example, the driving controller 200, the gate driver 300, the gamma reference voltage generator 400, and the data driver 500 may be integrally formed. For example, the driving controller 200, the gate driver 300, the gamma reference voltage generator 400, the data driver 500, and the transmitting driver 600 may be integrally formed. For example, the driving controller 200, the gate driver 300, the gamma reference voltage generator 400, the data driver 500, the transmitting driver 600, and the power voltage generator 700 may be integrally formed.

[0037] For example, the display panel 100 may be an organic light emitting display panel including organic light emitting elements. Alternatively, the display panel 100 may be a liquid crystal display panel including a liquid crystal layer. The inventive concept is not limited to one of the organic light emitting display panel and the liquid crystal display panel. The inventive concept may be applied to both the organic light emitting display panel and the liquid crystal display panel.

[0038] The display panel 100 includes a plurality of gate lines GWL and GIL, a plurality of data lines DL, and a plurality of pixels electrically connected to the plurality of gate lines GWL and GIL and the plurality of data lines DL. The plurality of gate lines GWL and GIL may extend in a first direction D1, and the plurality of data lines DL may extend in a second direction D2 intersecting the first direction D1. The display panel 100 may further include a plurality of emission lines EL extending in the first direction D1 and electrically connected to the plurality of pixels.

[0039] The driving controller 200 receives input image data IMG and an input control signal CONT from an external device. For example, the input image data IMG may include red image data, green image data, and blue image data. The input image data IMG may include white image data. The input image data IMG may include magenta image data, cyan image data, and yellow image data. The input control signal CONT may include a main clock signal and a data enable signal. The input control signal CONT may further include a vertical synchronization signal and a horizontal synchronization signal.

[0040] The driving controller 200 generates a first control signal CONT1, a second control signal CONT2, a third control signal CONT3, a fourth control signal CONT4, and a data signal DATA based on the input image data IMG and the input control signal CONT.

[0041] The driving controller 200 generates a first control signal CONT1 for controlling the operation of the gate driver 300 based on the input control signal CONT, and outputs the first control signal CONT1 to the gate driver 300. The first control signal CONT1 may include a vertical start signal and a gate clock signal.

[0042] The driving controller 200 generates a second control signal CONT2 for controlling the operation of the data driver 500 based on the input control signal CONT, and outputs the second control signal CONT2 to the data driver 500. The second control signal CONT2 may include a horizontal start signal and a load signal.

[0043] The driving controller 200 generates a data signal DATA based on the input image data IMG. The driving controller 200 outputs the data signal DATA to the data driver 500.

[0044] The driving controller 200 generates a third control signal CONT3 for controlling the operation of the gamma reference voltage generator 400 based on the input control signal CONT, and outputs the third control signal CONT3 to the gamma reference voltage generator 400.

[0045] The driving controller 200 generates a fourth control signal CONT4 for controlling the operation of the emission driver 600 based on the input control signal CONT, and outputs the fourth control signal CONT4 to the emission driver 600.

[0046] The gate driver 300 generates gate signals to drive a plurality of gate lines GWL and GIL in response to the first control signal CONT1 received from the driving controller 200. The gate driver 300 may sequentially output the gate signals to the plurality of gate lines GWL and GIL. For example, the gate driver 300 may be mounted on the display panel 100. For example, the gate driver 300 may be integrated on the display panel 100.

[0047] The gamma reference voltage generator 400 generates a gamma reference voltage VGREF in response to the third control signal CONT3 received from the driving controller 200. The gamma reference voltage generator 400 supplies the gamma reference voltage VGREF to the data driver 500. The gamma reference voltage VGREF has a value corresponding to the level of the data signal DATA.

[0048] In an exemplary embodiment of the inventive concept, the gamma reference voltage generator 400 may be disposed in the driving controller 200 or the data driver 500.

[0049] The data driver 500 receives a second control signal CONT2 and a data signal DATA from the driving controller 200, and receives a gamma reference voltage VGREF from the gamma reference voltage generator 400. The data driver 500 converts the data signal DATA into a data voltage having an analog type using the gamma reference voltage VGREF. The data driver 500 outputs the data voltage to the data line DL.

[0050] The emission driver 600 generates an emission signal to drive the emission line EL in response to a fourth control signal CONT4 received from the driving controller 200. The emission driver 600 may output the emission signal to the emission line EL.

[0051] The power voltage generator 700 may generate power voltages for operating the display panel 100 and the display panel driver. For example, the power voltage generator 700 may output a high power voltage ELVDD to the pixel circuit of the display panel 100. For example, the power voltage generator 700 may output a low power voltage ELVSS to the pixel circuit of the display panel 100. For example, the power voltage generator 700 may output an initialization voltage VI to the pixel circuit of the display panel 100.

[0052] Figure 2 is a circuit diagram of a pixel of the display panel 100 showing an exemplary embodiment according to the inventive concept Figure 1 of.

[0053] Referring to Figure 1 and Figure 2 , the display panel 100 includes a plurality of pixels. Each pixel may include an organic light emitting element OLED. However, the inventive concept may not be limited to an organic light emitting display panel including the organic light emitting element OLED.

[0054] For example, the pixel receives a data write gate signal GW, a data initialization gate signal GI, an organic light emitting element initialization signal, a data voltage VDATA, and an emission signal EM, and the organic light emitting element OLED of the pixel emits light corresponding to the level of the data voltage VDATA to display an image. In an exemplary embodiment of the inventive concept, the organic light emitting element initialization signal may be the same as the data initialization gate signal GI.

[0055] At least one of the plurality of pixels may include a first pixel switching element T1 to a seventh pixel switching element T7, a storage capacitor CST, and an organic light emitting element OLED.

[0056] Although in the present exemplary embodiment, the pixel includes seven pixel switching elements, the inventive concept is not limited thereto.

[0057] The first pixel switching element T1 includes a control electrode connected to the first node N1, an input electrode connected to the second node N2, and an output electrode connected to the third node N3.

[0058] For example, the first pixel switching element T1 may be a P-type thin film transistor. The control electrode of the first pixel switching element T1 may be a gate electrode, the input electrode of the first pixel switching element T1 may be a source electrode, and the output electrode of the first pixel switching element T1 may be a drain electrode.

[0059] The second pixel switching element T2 includes a control electrode to which a data write gate signal GW is applied, an input electrode to which a data voltage VDATA is applied, and an output electrode connected to the second node N2.

[0060] For example, the second pixel switching element T2 may be a P-type thin film transistor. The control electrode of the second pixel switching element T2 may be a gate electrode, the input electrode of the second pixel switching element T2 may be a source electrode, and the output electrode of the second pixel switching element T2 may be a drain electrode.

[0061] The third pixel switching element T3 includes a control electrode to which a data write gate signal GW is applied, an input electrode connected to the first node N1, and an output electrode connected to the third node N3.

[0062] For example, the third pixel switching element T3 may be a P-type thin film transistor. The control electrode of the third pixel switching element T3 may be a gate electrode, the input electrode of the third pixel switching element T3 may be a source electrode, and the output electrode of the third pixel switching element T3 may be a drain electrode.

[0063] The fourth pixel switching element T4 includes a control electrode to which a data initialization gate signal GI is applied, an input electrode to which an initialization voltage VI is applied, and an output electrode connected to the first node N1.

[0064] For example, the fourth pixel switching element T4 may be a P-type thin film transistor. The control electrode of the fourth pixel switching element T4 may be a gate electrode, the input electrode of the fourth pixel switching element T4 may be a source electrode, and the output electrode of the fourth pixel switching element T4 may be a drain electrode.

[0065] The fifth pixel switching element T5 includes a control electrode to which an emission signal EM is applied, an input electrode to which a high power supply voltage ELVDD is applied, and an output electrode connected to the second node N2.

[0066] For example, the fifth pixel switching element T5 may be a P-type thin film transistor. The control electrode of the fifth pixel switching element T5 may be a gate electrode, the input electrode of the fifth pixel switching element T5 may be a source electrode, and the output electrode of the fifth pixel switching element T5 may be a drain electrode.

[0067] The sixth pixel switching element T6 includes a control electrode to which an emission signal EM is applied, an input electrode connected to the third node N3, and an output electrode connected to the anode of the organic light emitting element OLED.

[0068] For example, the sixth pixel switching element T6 may be a P-type thin film transistor. The control electrode of the sixth pixel switching element T6 may be a gate electrode, the input electrode of the sixth pixel switching element T6 may be a source electrode, and the output electrode of the sixth pixel switching element T6 may be a drain electrode.

[0069] The seventh pixel switching element T7 includes a control electrode to which a data initialization gate signal GI is applied, an input electrode to which an initialization voltage VI is applied, and an output electrode connected to the anode of the organic light emitting element OLED.

[0070] For example, the seventh pixel switching element T7 may be a P-type thin film transistor. The control electrode of the seventh pixel switching element T7 may be a gate electrode, the input electrode of the seventh pixel switching element T7 may be a source electrode, and the output electrode of the seventh pixel switching element T7 may be a drain electrode.

[0071] The storage capacitor CST includes a first electrode to which a high power supply voltage ELVDD is applied and a second electrode connected to the first node N1.

[0072] The organic light emitting element OLED includes an anode and a cathode to which a low power supply voltage ELVSS is applied. For example, the organic light emitting element OLED may be an organic light emitting diode.

[0073] Figure 3 is a conceptual diagram showing a display quality degradation pattern displayed on the Figure 1 display panel 100 according to an exemplary embodiment of the inventive concept. Figure 4 is a timing diagram showing an example level of the initialization voltage VI of the display quality degradation pattern according to an exemplary embodiment of the inventive concept according to Figure 3 the Figure 5 is a timing diagram showing an example level of the initialization voltage VI of the display quality degradation pattern according to an exemplary embodiment of the inventive concept according to Figure 3 the

[0074] Refer to Figures 1 to 5, the display quality degradation pattern may be a crosstalk pattern that generates crosstalk. The display quality degradation pattern may include a main region BX and a background region BG other than (e.g., excluding) the main region BX. The main region BX may have a relatively high brightness. The background region BG may have a relatively low brightness. For example, the main region BX may have the shape of a rectangular box.

[0075] The background region BG arranged at the first side of the main region BX in the horizontal direction may be referred to as the first region BGA. The background region BG arranged at the second side of the main region BX opposite to the first side in the horizontal direction may be referred to as the second region BGB.

[0076] When the data voltage applied to the main region BX is VDBX and the data voltage applied to the first region BGA is VDBGA, VDBX may have a relatively high voltage corresponding to the main region BX and a relatively low voltage corresponding to the background region BG. On the contrary, the voltage path of VDBGA does not pass through the main region BX, so that VDBGA can continuously have a relatively low voltage.

[0077] When VDBX rises from a low level to a high level, due to the coupling in the display panel 100, the voltage in the display panel 100 may increase. For example, as Figure 4 shown, when VDBX rises from a low level to a high level, due to the coupling in the display panel 100, the initialization voltage VI applied to the pixel may increase. Alternatively, the levels of the high power supply voltage ELVDD and the low power supply voltage ELVSS may change according to VDBX, which may cause display quality degradation.

[0078] As Figure 4 shown, when VDBX rises from a low level to a high level, the initialization voltage VI may increase. When the initialization voltage VI increases in response to the rise of VDBX, the difference between the level of the data voltage VDBGA of the first region BGA and the level of the initialization voltage VI decreases, so that the brightness of the first region BGA may be lower than the target brightness.

[0079] In a similar manner, when the initialization voltage VI increases in response to the rise of VDBX, the difference between the level of the data voltage of the second region BGB and the level of the initialization voltage VI decreases, so that the brightness of the second region BGB may be lower than the target brightness.

[0080] For example, in Figure 4 shown, the increased initialization voltage VI may gradually decrease within a relatively long duration, so that the decrease in the brightness of the first region BGA and the second region BGB can be maintained for a relatively long duration. Therefore, the decrease in the brightness of the first region BGA and the second region BGB can be shown as a planar type.

[0081] For example, in Figure 5 , the level of the initialization voltage VI can be immediately increased and immediately decreased so that the reduction in the brightness of the first region BGA and the second region BGB can be shown in a short time, and thus the reduction in the brightness of the first region BGA and the second region BGB can be shown as a linear type.

[0082] Figure 6 is a conceptual diagram showing the first threshold gray value GTH1 and the second threshold gray value GTH2 stored in Figure 1 the driving controller 200 according to an exemplary embodiment of the concept of the present invention to determine a display quality degradation pattern. Figure 7 is a conceptual diagram showing the method by which Figure 1 the driving controller 200 according to an exemplary embodiment of the concept of the present invention determines the horizontal start point XSTART of the main region BX of the display quality degradation pattern, the horizontal width XWIDTH of the main region BX, the vertical start point YSTART of the main region BX, and the vertical width YWIDTH of the main region BX. Figure 8 is a conceptual diagram showing the method by which Figure 1 the driving controller 200 according to an exemplary embodiment of the concept of the present invention determines the first compensation value and the second compensation value. Figure 9 is a conceptual diagram showing the display quality degradation pattern displayed on Figure 1 the display panel 100 according to an exemplary embodiment of the concept of the present invention. Figure 10 is a conceptual diagram showing the display quality degradation pattern displayed on Figure 1 the display panel 100 according to an exemplary embodiment of the concept of the present invention.

[0083] Referring to Figures 1 to 10 , the driving controller 200 can determine whether the input image data IMG includes a display quality degradation pattern.

[0084] For example, the driving controller 200 can store the first threshold gray value GTH1 for determining the main region BX and the second threshold gray value GTH2 for determining the background region BG other than the main region BX.

[0085] For example, when the gray value of the main region BX is greater than the first threshold gray value GTH1 and the gray value of the background region BG is less than the second threshold gray value GTH2, the driving controller 200 can determine that the input image data IMG includes a display quality degradation pattern.

[0086] Alternatively, when the difference between the first grayscale value corresponding to the main region BX and the second grayscale value corresponding to the background region BG other than the main region BX is greater than the threshold grayscale value difference, the driving controller 200 may determine that the input image data IMG includes a display quality degradation pattern. In the present exemplary embodiment, the driving controller 200 may store the threshold grayscale value difference.

[0087] When the input image data IMG includes a display quality degradation pattern, the driving controller 200 may determine the horizontal starting point XSTART of the main region BX, the horizontal width XWIDTH of the main region BX, the vertical starting point YSTART of the main region BX, and the vertical width YWIDTH of the main region BX.

[0088] In Figure 3 it, the coordinates of the four vertices of the main region BX may be (C, D), (A, D), (C, B), and (A, B) respectively. The horizontal starting point XSTART of the main region BX may be C. The horizontal width XWIDTH of the main region BX may be A - C. The vertical starting point YSTART of the main region BX may be D. The vertical width YWIDTH of the main region BX may be B - D.

[0089] The driving controller 200 may determine a first compensation value for compensating the first region BGA disposed at or in the first side of the main region BX and a second compensation value for compensating the second region BGB disposed at or in the second side of the main region BX according to the position of the main region BX of the display quality degradation pattern. For example, the sizes of the first region BGA and the second region BGB may be determined using the horizontal starting point XSTART of the main region BX, for example, by determining the distance between the side of the display panel 100 and the horizontal starting point XSTART.

[0090] For example, when the main region BX is disposed in the central portion of the display panel 100 in the horizontal direction as shown in Figure 3 it, the first compensation value corresponding to the first region BGA may be the same as the second compensation value corresponding to the second region BGB.

[0091] As shown in Figure 9 it, when the main region BX is disposed closer to the first side or end of the display panel 100 in the horizontal direction, the size of the first region BGC may be smaller than the size of the second region BGD. When the size of the first region BGC is relatively reduced, the coupling degree in the first region BGC may increase. Therefore, when the size of the first region BGC is relatively reduced, the first compensation value may increase. When the size of the first region BGC is smaller than the size of the second region BGD, the first compensation value may be greater than the second compensation value.

[0092] As shown in Figure 10As shown, when the main area BX is arranged closer to the second side or end of the display panel 100 in the horizontal direction, the size of the first area BGE can be larger than the size of the second area BGF. When the size of the first area BGE relatively increases, the coupling degree in the first area BGE can decrease. Therefore, when the size of the first area BGE relatively increases, the first compensation value can decrease. When the size of the first area BGE is larger than the size of the second area BGF, the first compensation value can be less than the second compensation value.

[0093] The sizes of the first area (e.g., BGA, BGC, BGE) and the second area (e.g., BGB, BGD, BGF) can have an opposite relationship. In other words, when the size of the first area decreases, the size of the second area increases, and when the size of the first area increases, the size of the second area decreases.

[0094] Referring again to Figure 8 , the initial compensation values corresponding to the first area BGA and the second area BGB can be stored in a look-up table.

[0095] For example, when the gray value of the background area BG is 64 and the gray value of the main area BX is zero or 64, the driving controller 200 may not perceive a display quality degradation pattern.

[0096] When the gray value of the background area BG is 64 and the gray value of the main area BX is 128, the driving controller 200 may perceive a display quality degradation pattern, and the driving controller 200 may adjust the gray values of the first area BGA and the second area BGB of the background area BG to 65 which is greater than 64.

[0097] When the gray value of the background area BG is 64 and the gray value of the main area BX is 196, the driving controller 200 may perceive a display quality degradation pattern, and the driving controller 200 may adjust the gray values of the first area BGA and the second area BGB of the background area BG to 66 which is greater than 64.

[0098] When the gray value of the background area BG is 64 and the gray value of the main area BX is 255, the driving controller 200 may perceive a display quality degradation pattern, and the driving controller 200 may adjust the gray values of the first area BGA and the second area BGB of the background area BG to 68 which is greater than 64.

[0099] For Figure 8 the initial compensation values of the gray values not shown can be generated using a linear interpolation method.

[0100] The first compensation value and the second compensation value can be determined by multiplying the gain (GAIN) by the initial compensation values stored in Figure 8 the look-up table.

[0101] For example, the first compensation value corresponding to the first region BGA can be determined by multiplying the first gain determined according to the position of the main region BX by the initial compensation value.

[0102] For example, the second compensation value corresponding to the second region BGB can be determined by multiplying the second gain determined according to the position of the main region BX by the initial compensation value.

[0103] When the main region BX is arranged closer to the first side of the display panel 100 (e.g., when the size of the first region BGA is smaller than the size of the second region BGB), the first gain can be greater than 1, and the second gain can be less than 1. In other words, the first side of the display panel 100 can be adjacent to the first side of the main region BX, and the second side of the display panel 100 can be adjacent to the second side of the main region BX. When the distance between the first side of the display panel 100 and the first side of the main region BX is less than the distance between the second side of the display panel 100 and the second side of the main region BX, the size of the first region BGA is smaller than the size of the second region BGB. Conversely, when the main region BX is arranged closer to the second side of the display panel 100 (e.g., when the size of the first region BGA is larger than the size of the second region BGB), the second gain can be greater than 1, and the first gain can be less than 1.

[0104] The data driver 500 can apply data voltages (e.g., VDATA) using the first compensation value and the second compensation value to the display panel 100.

[0105] Figure 11 is a conceptual diagram showing a display quality degradation pattern displayed on the Figure 1 display panel 100 according to an exemplary embodiment of the inventive concept.

[0106] The driving controller 200 can determine the first compensation value and the second compensation value according to the horizontal width XWIDTH of the main region BX of the display quality degradation pattern.

[0107] When the horizontal width XWIDTH of the main region BX increases, the first compensation value and the second compensation value can increase.

[0108] Figure 11 The horizontal width XWIDTH of the main region BX in Figure 3 can be smaller than the horizontal width XWIDTH of the main region BX in Figure 11 In addition, the horizontal width of the first region BGG in Figure 3 can be greater than the horizontal width of the first region BGA in Figure 11 and the horizontal width of the second region BGH in Figure 3 can be greater than the horizontal width of the second region BGB in

[0109] Figure 11 The first compensation value and the second compensation value in Figure 3 can be smaller than the first compensation value and the second compensation value in. As explained with reference to Figure 4 and Figure 5 when the lateral width XWIDTH of the main region BX is relatively small, the degree of change in the initialization voltage VI can be relatively small, so that the degree of crosstalk can be reduced.

[0110] In the above example, for the convenience of explanation, the reduction in the brightness of the first region BGA and the second region BGB having a planar type is illustrated. As explained with reference to Figure 5 the reduction in the brightness of the first region BGA and the second region BGB can have a linear type. When the reduction in the brightness of the first region BGA and the second region BGB has a linear type, the first compensation value and the second compensation value can be set to decrease from the longitudinal start point YSTART of the main region BX of the display quality degradation pattern to the longitudinal end point of the main region BX. Alternatively, when the reduction in the brightness of the first region BGA and the second region BGB has a linear type, the first compensation value and the second compensation value can be set corresponding to only the longitudinal start point YSTART of the main region BX of the display quality degradation pattern.

[0111] According to the present exemplary embodiment, the driving controller 200 can determine whether the input image data IMG includes a display quality degradation pattern such as a crosstalk pattern. The driving controller 200 can adjust the first compensation value applied to the left portion of the main region BX and the second compensation value applied to the right portion of the main region BX according to the position of the main region BX of the display quality degradation pattern. Therefore, although the position of the main region BX of the display quality degradation pattern changes, the display quality degradation can be minimized.

[0112] In addition, the driving controller 200 can adjust the first compensation value applied to the left portion of the main region BX of the display quality degradation pattern and the second compensation value applied to the right portion of the main region BX according to the width of the main region BX. Therefore, although the width of the main region BX of the display quality degradation pattern changes, the display quality degradation can be minimized.

[0113] Therefore, display quality degradation such as crosstalk can be prevented so that the display quality of the display panel 100 can be enhanced.

[0114] Figure 12 and Figure 13 are conceptual diagrams showing a method of determining the first compensation value and the second compensation value by the driving controller 200 of a display device according to an exemplary embodiment of the present inventive concept.

[0115] Except that the driving controller 200 includes two look-up tables, the display device and the method of driving the display device according to the present exemplary embodiment are substantially the same as the display device and the method of driving the display device of the exemplary embodiment described with reference to Figures 1 to 11 Therefore, the same reference numerals will be used to refer to parts that are the same as or similar to the parts described in the previous exemplary embodiment of Figures 1 to 11 and any repeated explanations of the above elements will be omitted.

[0116] Referring to Figure 1 , Figure 3 , Figure 12 and Figure 13 , the display device includes a display panel 100 and a display panel driver. The display panel driver includes a driving controller 200, a gate driver 300, a gamma reference voltage generator 400, and a data driver 500. The display panel driver may further include a transmit driver 600. The display panel driver may further include a power voltage generator 700.

[0117] The driving controller 200 may determine whether the input image data IMG includes a display quality degradation pattern.

[0118] The driving controller 200 may determine a first compensation value for compensating a first region BGA arranged at a first side of the main region BX and a second compensation value for compensating a second region BGB arranged at a second side of the main region BX according to the position of the main region BX of the display quality degradation pattern.

[0119] In the present exemplary embodiment, a first initial compensation value corresponding to the first region BGA may be stored in a first look-up table (in Figure 12 ). A second initial compensation value corresponding to the second region BGB may be stored in a second look-up table (in Figure 13 ).

[0120] When the first side and the second side of the display panel 100 have different characteristics according to the structure of the display panel 100 or the driving method of the display panel 100, the driving controller 200 may include a first look-up table for the first side of the display panel 100 and a second look-up table for the second side of the display panel 100.

[0121] The first compensation value may be determined by multiplying a first gain LGAIN determined according to the position of the main region BX by the first initial compensation value. The second compensation value may be determined by multiplying a second gain RGAIN determined according to the position of the main region BX by the second initial compensation value.

[0122] According to the present exemplary embodiment, the driving controller 200 may determine whether the input image data IMG includes a display quality degradation pattern such as a crosstalk pattern. The driving controller 200 may adjust a first compensation value applied to a left portion of the main region BX and a second compensation value applied to a right portion of the main region BX according to the position of the main region BX of the display quality degradation pattern. Accordingly, although the position of the main region BX of the display quality degradation pattern changes, the display quality degradation may be minimized.

[0123] In addition, the driving controller 200 may adjust a first compensation value applied to a left portion of the main region BX of the display quality degradation pattern and a second compensation value applied to a right portion of the main region BX according to the width of the main region BX. Accordingly, although the width of the main region BX of the display quality degradation pattern changes, the display quality degradation may be minimized.

[0124] Accordingly, display quality degradation such as crosstalk may be prevented so that the display quality of the display panel 100 may be enhanced.

[0125] As described above, in the display device and the method of driving the display device according to the exemplary embodiment of the present inventive concept, the driving controller may determine whether the input image data includes a display quality degradation pattern such as a crosstalk pattern. The driving controller may adjust a first compensation value applied to a left portion of the main region of the display quality degradation pattern and a second compensation value applied to a right portion of the main region according to the position of the main region of the display quality degradation pattern. Accordingly, although the position of the main region of the display quality degradation pattern changes, the display quality degradation may be minimized.

[0126] In addition, the driving controller may adjust a first compensation value applied to a left portion of the main region of the display quality degradation pattern and a second compensation value applied to a right portion of the main region according to the width of the main region. Accordingly, although the width of the main region of the display quality degradation pattern changes, the display quality degradation may be minimized.

[0127] Accordingly, display quality degradation such as crosstalk may be prevented so that the display quality of the display panel may be enhanced.

[0128] Although the present inventive concept has been shown and described with reference to the exemplary embodiments of the present inventive concept, it will be apparent to those of ordinary skill in the art that various changes in form and details may be made without departing from the scope and spirit of the present inventive concept as recited in the appended claims.

Claims

1. A display device, comprising: a display panel configured to display an image based on input image data; a driving controller configured to: determine whether the input image data includes a display quality degradation pattern, and determine a first compensation value for compensating a first region disposed at a first side of the main region and a second compensation value for compensating a second region disposed at a second side of the main region opposite to the first side of the main region according to the position of the main region of the display quality degradation pattern, wherein the size of the first region is negatively correlated with the first compensation value, and the size of the second region is negatively correlated with the second compensation value; and a data driver configured to apply data voltages using the first compensation value and the second compensation value to the display panel.

2. The display device according to claim 1, wherein, When the size of the first region is greater than the size of the second region, the first compensation value is less than the second compensation value.

3. The display device according to claim 1, wherein, Initial compensation values corresponding to the first region and the second region are stored in a look-up table, wherein the first compensation value is determined by multiplying a first gain determined according to the position of the main region by the initial compensation value, and wherein the second compensation value is determined by multiplying a second gain determined according to the position of the main region by the initial compensation value.

4. The display device according to claim 3, wherein, When the size of the first region is less than the size of the second region, the first gain is greater than one, and the second gain is less than one.

5. The display device according to claim 1, wherein, A first initial compensation value corresponding to the first region is stored in a first look-up table, and wherein a second initial compensation value corresponding to the second region is stored in a second look-up table.

6. The display device according to claim 5, wherein, The first compensation value is determined by multiplying a first gain determined according to the position of the main region by the first initial compensation value, and wherein the second compensation value is determined by multiplying a second gain determined according to the position of the main region by the second initial compensation value.

7. The display device according to claim 1, wherein, The driving controller is configured to store a first threshold gray value for determining the main region and a second threshold gray value for determining a background region other than the main region.

8. The display device according to claim 7, wherein When the gray value of the main region is greater than the first threshold gray value and the gray value of the background region is less than the second threshold gray value, the driving controller is configured to determine that the input image data includes the display quality degradation pattern.

9. The display device according to claim 1, wherein, When the difference between a first gray value corresponding to the main region and a second gray value corresponding to a background region other than the main region is greater than a threshold gray value difference, the driving controller is configured to determine that the input image data includes the display quality degradation pattern.

10. The display device according to claim 1, wherein, The driving controller is configured to determine a horizontal starting point of the main region, a horizontal width of the main region, a vertical starting point of the main region, and a vertical width of the main region.

11. The display device according to claim 10, wherein, The driving controller is configured to determine the first compensation value and the second compensation value according to the horizontal width of the main region.

12. The display device according to claim 11, wherein, When the lateral width of the main area increases, the first compensation value and the second compensation value increase.

13. The display device according to claim 10, wherein, The first compensation value and the second compensation value decrease from the longitudinal starting point of the main area of the display quality degradation pattern to the longitudinal end point of the main area.

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