Display device and method for driving display panel using the same

Abstract

The invention relates to a display device and a driving method of a display panel using the same. The display device includes a drive control portion, a data driving portion, and a display panel. The drive control unit calculates an average load of the unit region on the basis of an average gradation of the unit region and a pixel region ratio of the unit region. The thermal diffusion load of the unit region is calculated on the basis of the average load, the thermal diffusion ratio, and the weighted value ratio of adjacent unit regions adjacent to the unit region. And generates a compensation data signal by compensating input image data on the basis of the average load of the unit region and the thermal diffusion load of the unit region. The data driving section converts the compensation data signal into a data voltage. The display panel displays an image on the basis of the data voltage.

Description

Technical Field

[0001] The present invention relates to a display device and a driving method of a display panel using the display device, and more particularly to a display device that can accurately calculate the average load and thermal diffusion load of a unit area in a display device including a non-standard display area, and a driving method of a display panel using the display device. Background Art

[0002] Generally, a display device includes a display panel and a display panel driving unit. The display panel displays an image based on an input image and includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels. The display panel driving unit includes a gate driving unit that provides gate signals to the plurality of gate lines, a data driving unit that provides data voltages to the data lines, and a driving control unit that controls the operations of the gate driving unit and the data driving unit.

[0003] Special purpose display panels such as display panels for vehicle interiors may include an unshaped display area that is not a shaped display area in the form of a rectangle.

[0004] When the average load and the heat diffusion load are calculated for the non-standard display area by the conventional method, the average load and the heat diffusion load may be calculated inaccurately, which may cause a problem that the display quality of the display panel is reduced due to inaccurate compensation according to the load. Summary of the invention

[0005] Therefore, the technical problem of the present invention is focused on this, and an object of the present invention is to provide a display device including a non-standard display area, which can accurately calculate the average load and heat diffusion load per unit area.

[0006] Another object of the present invention is to provide a method for driving a display panel using the display device.

[0007] A display device according to an embodiment for achieving the above-mentioned purpose of the present invention includes a drive control unit, a data drive unit, and a display panel. The drive control unit calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area, and calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio, and weighted value ratio of adjacent unit areas adjacent to the unit area, and compensates input image data based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal. The data drive unit converts the compensation data signal into a data voltage. The display panel displays an image based on the data voltage.

[0008] In an embodiment of the present invention, the pixel area ratio may be determined based on the ratio of the pixel area to the non-pixel area in the unit area.

[0009] In an embodiment of the present invention, the drive control unit may convert the average grayscale of the unit area into a first average load, and determine the average load of the unit area by multiplying the first average load by the pixel area ratio.

[0010] In an embodiment of the present invention, the drive control unit may calculate a pixel area average grayscale by multiplying the average grayscale in the unit area by the pixel area ratio, and convert the pixel area average grayscale into the average load of the unit area.

[0011] In one embodiment of the present invention, the heat diffusion ratio may be a ratio indicating heat diffusion between adjacent unit regions. As the distance between the first unit region and the central unit region increases, the heat diffusion ratio of the central unit region in the first unit region decreases.

[0012] In one embodiment of the present invention, the heat diffusion load of the adjacent unit area adjacent to the central unit area may be calculated by multiplying the average load in the central unit area by the heat diffusion ratio of the central unit area and the weighted value ratio of the central unit area.

[0013] In an embodiment of the present invention, the smaller the pixel area ratio of the central unit area is, the smaller the weighted value ratio of the central unit area is.

[0014] In an embodiment of the present invention, the pixel area ratio of the central unit area may be different from the weighted value ratio of the central unit area.

[0015] In an embodiment of the present invention, the display panel may include a non-standard display area, namely, a first display area, and a standard display area, namely, a second display area.

[0016] In one embodiment of the present invention, at least one of the unit areas of the non-standard display area may include a non-pixel area, or all of the unit areas of the standard display area may include only pixel areas.

[0017] In one embodiment of the present invention, it may be that, when the input image data is data of the non-standard display area, the drive control unit calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area, and calculates the thermal diffusion load of the unit area based on the average load of the adjacent unit areas adjacent to the unit area, the thermal diffusion ratio, and the weighted value ratio.

[0018] In one embodiment of the present invention, when the input image data is data of the stereotyped display area, the drive control unit calculates the average load of the unit area based on the average grayscale of the unit area, and calculates the thermal diffusion load of the unit area based on the average load of the adjacent unit areas adjacent to the unit area and the thermal diffusion ratio.

[0019] In one embodiment of the present invention, the display device may further include: a gate driving unit that outputs a gate signal to the display panel. The gate driving unit may be arranged adjacent to a short side of the display panel. The data driving unit may be arranged adjacent to a long side of the display panel. The display panel may include: a gate line extending in an extending direction of the long side of the display panel; and a data line extending in an extending direction of the short side of the display panel.

[0020] In one embodiment of the present invention, the display device may further include: a gate driving unit that outputs a gate signal to the display panel. The gate driving unit may be arranged adjacent to the long side of the display panel. The data driving unit may be arranged adjacent to the long side of the display panel. The display panel may include: a gate line extending in the extension direction of the short side of the display panel; a first data line extending in the extension direction of the long side of the display panel; and a second data line extending in the extension direction of the short side of the display panel.

[0021] A method for driving a display panel according to an embodiment for achieving the above-mentioned purpose of the present invention includes: a step of calculating an average load of the unit area based on an average grayscale of the unit area and a pixel area ratio of the unit area; a step of calculating a thermal diffusion load of the unit area based on an average load, a thermal diffusion ratio and a weighted value ratio of adjacent unit areas adjacent to the unit area; a step of compensating input image data based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal; and a step of displaying an image based on the compensation data signal.

[0022] In an embodiment of the present invention, the pixel area ratio may be determined based on the ratio of the pixel area to the non-pixel area in the unit area.

[0023] In one embodiment of the present invention, the heat diffusion ratio may be a ratio indicating heat diffusion between adjacent unit regions. The heat diffusion ratio of the central unit region in the first unit region may decrease as the distance between the first unit region and the central unit region increases.

[0024] In one embodiment of the present invention, the heat diffusion load of the adjacent unit area adjacent to the central unit area may be calculated by multiplying the average load in the central unit area by the heat diffusion ratio of the central unit area and the weighted value ratio of the central unit area.

[0025] In an embodiment of the present invention, the smaller the pixel area ratio of the central unit area is, the smaller the weighted value ratio of the central unit area is.

[0026] A method for driving a display panel according to an embodiment for achieving the above-mentioned purpose of the present invention comprises: a step of determining whether input image data is data of a non-standard display area or data of a standard display area; a step of calculating an average load of the unit area based on an average grayscale of the unit area and a pixel area ratio of the unit area when the input image data is data of the non-standard display area, and calculating a thermal diffusion load of the unit area based on an average load, a thermal diffusion ratio and a weighted value ratio of adjacent unit areas adjacent to the unit area; a step of calculating the average load of the unit area based on an average grayscale of the unit area when the input image data is data of the standard display area, and calculating the thermal diffusion load of the unit area based on an average load and a thermal diffusion ratio of adjacent unit areas adjacent to the unit area; a step of compensating input image data based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal; and a step of displaying an image based on the compensation data signal.

[0027] According to such a display device and a driving method of a display panel using the display device, the driving control unit calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area. Therefore, in a display device including a non-standard display area, the accuracy of the average load can be increased.

[0028] In addition, the drive control unit calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area. Therefore, in the display device including the non-standard display area, the accuracy of the thermal diffusion load can be increased.

[0029] The accuracy of the average load and the heat diffusion load is increased, and thus the compensation accuracy of the input image data using the average load and the heat diffusion load can be increased. According to this, the display quality of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a block diagram showing a display device according to an embodiment of the present invention.

[0031] Figure 2 It is shown Figure 1 FIG. 1 is a diagram showing an example of a display panel.

[0032] Figure 3 It is shown Figure 2 Graph of the first unit area of ​​.

[0033] Figure 4 It is shown Figure 2 Graph of the second unit area of ​​.

[0034] Figure 5 It is shown Figure 1 Block diagram of the drive control unit.

[0035] Figure 6 and Figure 7 Show Figure 5 Figure 1. The working diagram of the heat diffusion load calculation unit.

[0036] Figure 8 It shows the use of Figure 1 Flow chart of a method for driving a display panel of a display device.

[0037] Fig. 9 FIG. 1 is a diagram showing an example of a display panel of a display device according to an embodiment of the present invention.

[0038] Fig.10 It shows the use of Fig. 9 Flow chart of a method for driving a display panel of a display device.

[0039] Fig.11 is a block diagram showing a display device according to an embodiment of the present invention.

[0040] Figures 12a to 12d It is shown Fig.11 Schematic diagram of various content usage forms of the display panel.

[0041] Fig.13 is a block diagram showing an electronic device according to an embodiment of the present invention.

[0042] (Explanation of Reference Numerals)

[0043] 100: Display panel 200: Drive control unit

[0044] 210: Average load calculation unit 220: Heat diffusion load calculation unit

[0045] 230: Compensation unit 300: Gate driving unit

[0046] 400: Gamma reference voltage generating unit 500: Data driving unit DETAILED DESCRIPTION

[0047] The present invention will be described in more detail below with reference to the accompanying drawings.

[0048] Figure 1 is a block diagram showing a display device according to an embodiment of the present invention.

[0049] Reference Figure 1 The display device includes a display panel 100 and a display panel driving unit. The display panel driving unit drives the display panel 100. The display panel driving unit includes a driving control unit 200, a gate driving unit 300, a gamma reference voltage generating unit 400 and a data driving unit 500.

[0050] For example, the drive control unit 200 and the data drive unit 500 may be integrated. For example, the drive control unit 200, the gamma reference voltage generating unit 400 and the data drive unit 500 may be integrated. The drive module in which at least the drive control unit 200 and the data drive unit 500 are integrated may be named a timing controller embedded data driver (TED).

[0051] The display panel 100 includes a display portion AA for displaying an image and a peripheral portion PA disposed adjacent to the display portion AA.

[0052] The display panel 100 includes a plurality of gate lines GL, a plurality of data lines DL, and a plurality of pixels P electrically connected to each of the gate lines GL and the data lines DL. The gate lines GL may extend in a first direction D1, and the data lines DL may extend in a second direction D2 crossing the first direction D1.

[0053] The drive control unit 200 may receive input image data IMG and an input control signal CONT from an external device (e.g., an application processor). For example, the input image data IMG may include red image data, green image data, and cyan image data. The input image data IMG may include white image data. The input image data IMG may include magenta image data, yellow image data, and cyan image data. The input control signal CONT may include a main clock signal and a data enable signal. The input control signal CONT may also include a vertical synchronization signal and a horizontal synchronization signal.

[0054] The driving control part 200 generates a first control signal CONT1 , a second control signal CONT2 , a third control signal CONT3 , and a compensation data signal DATA based on the input image data IMG and the input control signal CONT.

[0055] The driving control part 200 generates the first control signal CONT1 for controlling the operation of the gate driving part 300 based on the input control signal CONT and outputs it to the gate driving part 300. The first control signal CONT1 may include a vertical start signal and a gate clock signal.

[0056] The driving control part 200 generates the second control signal CONT2 for controlling the operation of the data driving part 500 based on the input control signal CONT and outputs it to the data driving part 500. The second control signal CONT2 may include a horizontal start signal and a load signal.

[0057] The driving control part 200 generates a compensation data signal DATA based on the input image data IMG. The driving control part 200 outputs the compensation data signal DATA to the data driving part 500.

[0058] In this embodiment, the drive control unit 200 calculates the average load of the unit area based on the average grayscale of the unit area of ​​the display panel 100 and the pixel area ratio of the unit area, and calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area, and compensates the input image data IMG based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal DATA.

[0059] The driving control part 200 generates the third control signal CONT3 for controlling the operation of the gamma reference voltage generating part 400 based on the input control signal CONT and outputs the third control signal CONT3 to the gamma reference voltage generating part 400 .

[0060] The gate driving unit 300 generates a gate signal for driving the gate line GL in response to the first control signal CONT1 received from the driving control unit 200. The gate driving unit 300 outputs the gate signal to the gate line GL. For example, the gate driving unit 300 may output the gate signal to the gate line GL in sequence. For example, the gate driving unit 300 may be mounted on the peripheral portion PA of the display panel 100. For example, the gate driving unit 300 may be integrated on the peripheral portion PA of the display panel 100.

[0061] The gamma reference voltage generating part 400 generates a gamma reference voltage VGREF in response to the third control signal CONT3 received from the driving control part 200. The gamma reference voltage generating part 400 provides the gamma reference voltage VGREF to the data driving part 500.

[0062] In an embodiment of the present invention, the gamma reference voltage generating unit 400 may be configured in the driving control unit 200 or in the data driving unit 500 .

[0063] The data driving unit 500 receives the second control signal CONT2 and the compensation data signal DATA from the driving control unit 200, and receives the gamma reference voltage VGREF from the gamma reference voltage generating unit 400. The data driving unit 500 converts the compensation data signal DATA into a data voltage in analog form using the gamma reference voltage VGREF. The data driving unit 500 outputs the data voltage to the data line DL.

[0064] In this embodiment, the gate driving unit 300 may be disposed adjacent to the short side of the display panel 100. The data driving unit 500 may be disposed adjacent to the long side of the display panel 100. The display panel 100 may include a gate line GL extending in an extending direction of the long side of the display panel 100 and a data line DL extending in an extending direction of the short side of the display panel 100.

[0065] Figure 2 It is shown Figure 1 FIG. 1 is a diagram showing an example of a display panel 100 . Figure 3 It is shown Figure 2 FIG. 5 is a diagram of a first unit area UA1. Figure 4 It is shown Figure 2 FIG. 5 is a diagram of a second unit area UA2.

[0066] Reference Figures 1 to 4 The display panel 100 may have an amorphous shape other than a rectangular shape. For example, the display panel 100 may be a display inside a car. For example, the display panel 100 may include a very long side in the first direction D1 compared to a general display and include a narrow side in the second direction D2. For example, the upper side, the lower side, the left side, and the right side of the display panel 100 may each have a curved portion.

[0067] The display panel 100 may include a first unit area UA1 and a second unit area UA2. The first unit area UA1 and the second unit area UA2 may have the same area.

[0068] The first unit area UA1 may be a fixed-shaped unit area including only the pixel area PA1, whereas the second unit area UA2 may be a non-fixed-shaped unit area including the pixel area PA2 and the non-pixel area NPA2.

[0069] The pixel area ratio of the unit area may be determined based on a ratio of a pixel area and a non-pixel area within the unit area.

[0070] For example, a ratio of the pixel area PA1 to the non-pixel area in the first unit area UA1 may be 100: 0. Therefore, a pixel area ratio of the first unit area UA1 may be 100%.

[0071] For example, a ratio of the pixel area PA2 to the non-pixel area NPA2 in the second unit area UA2 may be 60: 40. Therefore, a pixel area ratio of the second unit area UA2 may be 60%.

[0072] Figure 5 It is shown Figure 1 1 is a block diagram of a drive control unit 200. Figure 6 and Figure 7 It is shown Figure 5 FIG. 2 is a diagram showing the operation of the heat diffusion load calculation unit 220 .

[0073] Reference Figures 1 to 6 The driving control unit 200 may include an average load calculation unit 210 , a heat diffusion load calculation unit 220 , and a compensation unit 230 .

[0074] The average load calculation unit 210 may calculate the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area.

[0075] When the number of pixels in a unit area is N*N, the average load calculation unit 210 may add all the N*N grayscales of the input image data corresponding to the unit area, and then divide the added grayscales into the number of pixels, namely N*N, to obtain the average grayscale of the unit area.

[0076] For example, the average load calculation unit 210 may convert the average grayscale of the unit area into a first average load, and determine the average load of the unit area by multiplying the first average load by the pixel area ratio.

[0077] If the average grayscale of the unit area is 255 grayscale, and the load corresponding to 255 grayscale is 100, and the pixel area ratio of the unit area is 100%, then the first average load is determined to be 100 corresponding to 255 grayscale, and the first average load, i.e. 100, is multiplied by the pixel area ratio, i.e. 100%, so that 100 can be determined as the average load of the unit area.

[0078] If the average grayscale of the unit area is 100 grayscales, and the load corresponding to 100 grayscales is 60, and the pixel area ratio of the unit area is 100%, then the first average load is determined to be 60 corresponding to 100 grayscales, and the first average load, i.e. 60, is multiplied by the pixel area ratio, i.e. 100%, so that 60 can be determined as the average load of the unit area.

[0079] If the average grayscale of the unit area is 255 grayscale, and the load corresponding to 255 grayscale is 100, and the pixel area ratio of the unit area is 60%, then the first average load is determined to be 100 corresponding to 255 grayscale, and the first average load, i.e., 100, is multiplied by the pixel area ratio, i.e., 60, so that 60 can be determined as the average load of the unit area.

[0080] If the average grayscale of the unit area is 100 grayscales, and the load corresponding to 100 grayscales is 60, and the pixel area ratio of the unit area is 60%, then the first average load is determined to be 60 corresponding to 100 grayscales, and the first average load, i.e. 60, is multiplied by the pixel area ratio, i.e. 60%, so that 36 can be determined as the average load of the unit area.

[0081] Alternatively, the average load calculation unit 210 may calculate the pixel area average grayscale by multiplying the average grayscale in the unit area by the pixel area ratio, and convert the pixel area average grayscale into the average load of the unit area.

[0082] If the average grayscale of the unit area is 255 grayscale, and the load corresponding to the 255 grayscale is 100, and the pixel area ratio of the unit area is 100%, then the average grayscale of the pixel area is converted into 255 grayscale by multiplying the average grayscale of the unit area 255 by the pixel area ratio, i.e., 100%, and the average load of the unit area can be converted into 100, which is the grayscale corresponding to the average grayscale of the pixel area, i.e., 255.

[0083] If the average grayscale of the unit area is 255 grayscale, and the load corresponding to 153 grayscale is 60, and the pixel area ratio of the unit area is 60%, then the average grayscale of the pixel area is converted into 153 grayscale by multiplying the average grayscale of the unit area 255 by the pixel area ratio, i.e., 60%, and the average load of the unit area can be converted into 60 corresponding to the average grayscale of the pixel area, i.e., 153 grayscale.

[0084] The heat diffusion load calculation unit 220 may calculate the heat diffusion load of the unit area based on an average load, a heat diffusion ratio, and a weighted value ratio of adjacent unit areas adjacent to the unit area.

[0085] The central unit area affects the adjacent unit areas based on the average load, heat diffusion ratio and weighted value ratio of the central unit area. Here, the average load, heat diffusion ratio and weighted value ratio in the characteristic unit area can be calculated based on the central unit area.

[0086] In contrast, the heat diffusion load may mean a load of adjacent unit areas obtained due to the influence of the central unit area.

[0087] The heat diffusion ratio may be a ratio indicating heat diffusion between adjacent unit regions. The heat diffusion ratio of the central unit region in the characteristic unit region may decrease as the distance between the characteristic unit region and the central unit region increases.

[0088] The compensation unit 230 may compensate the input image data IMG based on the average load of the unit area and the heat diffusion load of the unit area to generate a compensation data signal DATA.

[0089] Figure 6 is a graph for the heat diffusion load considering only the heat diffusion ratio.

[0090] exist Figure 6The first adjacent unit area adjacent to the central unit area C receives a heat diffusion load corresponding to the first ratio RA1 from the central unit area C. The heat diffusion load of the first adjacent unit area can be determined by multiplying the average load in the central unit area C by the heat diffusion ratio, i.e., the first ratio RA1.

[0091] exist Figure 6 , the second adjacent unit area adjacent to the central unit area C receives a heat diffusion load equivalent to the second ratio RA2 from the central unit area C. The second adjacent unit area is farther away from the central unit area C than the first adjacent unit area, and therefore, the second ratio RA2 may be smaller than the first ratio RA1. The heat diffusion load of the second adjacent unit area may be determined by multiplying the average load in the central unit area C by the heat diffusion ratio, i.e., the second ratio RA2.

[0092] exist Figure 6 , the third adjacent unit area adjacent to the central unit area C receives a heat diffusion load equivalent to the third ratio RA3 from the central unit area C. The third adjacent unit area is farther away from the central unit area C than the second adjacent unit area, and therefore the third ratio RA3 may be smaller than the second ratio RA2. The heat diffusion load of the third adjacent unit area may be determined by multiplying the average load in the central unit area C by the heat diffusion ratio, i.e., the third ratio RA3.

[0093] exist Figure 6 , the fourth adjacent unit area adjacent to the central unit area C receives a heat diffusion load corresponding to the fourth ratio RA4 from the central unit area C. The fourth adjacent unit area is farther away from the central unit area C than the third adjacent unit area, and therefore the fourth ratio RA4 may be smaller than the third ratio RA3. The heat diffusion load of the fourth adjacent unit area may be determined by multiplying the average load in the central unit area C by the heat diffusion ratio, i.e., the fourth ratio RA4.

[0094] exist Figure 6 , the fifth adjacent unit area adjacent to the central unit area C receives a heat diffusion load corresponding to the fifth ratio RA5 from the central unit area C. The fifth adjacent unit area is farther away from the central unit area C than the fourth adjacent unit area, and therefore the fifth ratio RA5 may be smaller than the fourth ratio RA4. The heat diffusion load of the fifth adjacent unit area may be determined by multiplying the average load in the central unit area C by the heat diffusion ratio, i.e., the fifth ratio RA5.

[0095] For example, when the average load of the central unit area C is 100, the first ratio RA1 is 90%, the second ratio RA2 is 80%, the third ratio RA3 is 60%, the fourth ratio RA4 is 40%, and the fifth ratio RA5 is 20%, the thermal diffusion loads of the first to fifth adjacent unit areas can be 90, 80, 60, 40, and 20, respectively.

[0096] The final load of the first to fifth adjacent unit areas may be determined by adding an average load of each of the first to fifth adjacent unit areas to the heat diffusion load.

[0097] exist Figure 6 For the sake of convenience, the heat diffusion ratio in the right direction is described with reference to the central unit area C, and the heat diffusion ratio can be calculated from the central unit area C in all directions.

[0098] In addition, Figure 6 For the sake of convenience in explanation, it is shown that the first to fifth adjacent unit regions receive the heat diffusion load from one of the central unit regions C, but actually the heat diffusion load may be received from all unit regions adjacent to each of the first to fifth adjacent unit regions.

[0099] Figure 7 This is a diagram for all heat diffusion loads taking into account the heat diffusion ratio and the weighted value ratio.

[0100] exist Figure 7 , a first adjacent unit area adjacent to the central unit area C receives a heat diffusion load corresponding to a sixth ratio RB1 from the central unit area C. The heat diffusion load of the first adjacent unit area may be determined by multiplying the average load in the central unit area C by a sixth ratio RB1 obtained by multiplying the heat diffusion ratio, i.e., the first ratio RA1 and the weighted value ratio.

[0101] For example, when the pixel area ratio of the central unit area C is 100%, the weighted value ratio may be determined to be 100%. Conversely, when the pixel area ratio of the central unit area C is less than 100%, the weighted value ratio may also be determined to be less than 100%.

[0102] The pixel area ratio of the unit area being less than 100% means that the unit area is an amorphous unit area. In the case where the unit area is an amorphous unit area, heat diffusion may occur less than in the case where the unit area is amorphous unit area.

[0103] Therefore, when the unit area is an amorphous unit area, it is necessary to reduce the value of the heat diffusion load affecting the adjacent unit area using a separate weighting value ratio.

[0104] For example, the smaller the pixel area ratio of the central unit area is, the smaller the weighted value ratio of the central unit area may be.

[0105] In addition, the pixel area ratio of the central unit area may be different from the weight value ratio of the central unit area.

[0106] exist Figure 7 , the second adjacent unit area adjacent to the central unit area C receives a heat diffusion load equivalent to the seventh ratio RB2 from the central unit area C. The second adjacent unit area is farther away from the central unit area C than the first adjacent unit area, and therefore the seventh ratio RB2 may be smaller than the sixth ratio RB1. The heat diffusion load of the second adjacent unit area may be determined by multiplying the average load in the central unit area C by the seventh ratio RB2 obtained by multiplying the heat diffusion ratio, i.e., the second ratio RA2, and the weighted value ratio.

[0107] Similarly, in Figure 7 , the third adjacent unit area adjacent to the central unit area C receives a heat diffusion load equivalent to the eighth ratio RB3 from the central unit area C. The heat diffusion load of the third adjacent unit area can be determined by multiplying the average load in the central unit area C by the eighth ratio RB3 obtained by multiplying the heat diffusion ratio, i.e., the third ratio RA3, and the weighted value ratio.

[0108] Similarly, in Figure 7 , the fourth adjacent unit area adjacent to the central unit area C receives a heat diffusion load corresponding to the ninth ratio RB4 from the central unit area C. The heat diffusion load of the fourth adjacent unit area may be determined by multiplying the average load in the central unit area C by the ninth ratio RB4 obtained by multiplying the heat diffusion ratio, i.e., the fourth ratio RA4, by the weighted value ratio.

[0109] Similarly, in Figure 7 , the fifth adjacent unit area adjacent to the central unit area C receives a heat diffusion load equivalent to the tenth ratio RB5 from the central unit area C. The heat diffusion load of the fifth adjacent unit area can be determined by multiplying the average load in the central unit area C by the tenth ratio RB5 obtained by multiplying the heat diffusion ratio, that is, the fifth ratio RA5, and the weighted value ratio.

[0110] For example, when the average load of the central unit area C is 100, the first ratio RA1 is 90%, the second ratio RA2 is 80%, the third ratio RA3 is 60%, the fourth ratio RA4 is 40%, and the fifth ratio RA5 is 20%, and the weighted value ratio is 70%, the thermal diffusion loads of the first to fifth adjacent unit areas can be 63, 56, 42, 28, and 14, respectively.

[0111] The final load of the first to fifth adjacent unit areas may be determined by adding an average load of each of the first to fifth adjacent unit areas to the heat diffusion load.

[0112] Figure 8 It shows the use of Figure 1 Flow chart of a method for driving a display panel 100 of a display device.

[0113] Reference Figures 1 to 8 The driving method of the display panel 100 includes: a step of calculating an average load of the unit area based on an average grayscale of the unit area and a pixel area ratio of the unit area (S100); a step of calculating a thermal diffusion load of the unit area based on an average load, a thermal diffusion ratio and a weighted value ratio of adjacent unit areas adjacent to the unit area (S200); a step of compensating input image data IMG based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal DATA (S300); and a step of displaying an image based on the compensation data signal DATA (S400).

[0114] According to this embodiment, the drive control unit 200 calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area. Therefore, in a display device including an amorphous display area, the accuracy of the average load can be increased.

[0115] In addition, the drive control unit 200 calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area. Therefore, in the display device including the non-standard display area, the accuracy of the thermal diffusion load can be increased.

[0116] The accuracy of the average load and the heat diffusion load increases, and thus, the compensation accuracy of the input image data using the average load and the heat diffusion load can be increased. According to this, the display quality of the display panel 100 can be improved.

[0117] Fig. 9FIG. 1 is a diagram showing an example of a display panel of a display device according to an embodiment of the present invention. Fig.10 It shows the use of Fig. 9 Flow chart of a method for driving a display panel of a display device.

[0118] According to the display device of this embodiment, except that the display panel includes a non-standard display area and a standard display area, and the operation of the drive control unit becomes different depending on whether the data of the non-standard display area or the data of the standard display area is Figures 1 to 8 The display devices are substantially the same as those of the present invention, and therefore, the same reference numerals are used for the same or similar components, and repeated descriptions are omitted.

[0119] Reference Fig. 9 as well as Fig.10 In this embodiment, the driving control unit 200 calculates the average load of the unit area based on the average grayscale of the unit area of ​​the display panel 100 and the pixel area ratio of the unit area, and calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area, and compensates the input image data IMG based on the average load of the unit area and the thermal diffusion load of the unit area to generate the compensation data signal DATA.

[0120] The display panel 100 may include a non-standard display area, namely, a first display area DA1, and a standard display area, namely, a second display area DA2. The display panel 100 may further include a third display area DA3.

[0121] For example, the display panel 100 may be a vehicle display panel, the first display area DA1 may be a driver seat area, the second display area DA2 may be a public area, and the third display area DA3 may be a passenger seat area.

[0122] At least one of the unit areas of the non-stereotyped display area may include a non-pixel area. Conversely, all of the unit areas of the stereotyped display area may include only pixel areas.

[0123] In the case where the input image data IMG is data of the non-standard display area, the drive control unit 200 may calculate the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area, and calculate the thermal diffusion load of the unit area based on the average load of the adjacent unit areas adjacent to the unit area, the thermal diffusion ratio and the weighted value ratio.

[0124] On the contrary, in the case where the input image data IMG is data of the stereotyped display area, the drive control unit 200 may calculate the average load of the unit area based on the average grayscale of the unit area, and calculate the thermal diffusion load of the unit area based on the average load of the adjacent unit areas adjacent to the unit area and the thermal diffusion ratio.

[0125] The driving method of the display panel 100 of the present embodiment includes: a step of determining whether the input image data IMG is data of the non-standard display area or data of the standard display area (S50); when the input image data IMG is data of the non-standard display area, calculating the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area, and calculating the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area (S100 and S200); when the input image data IMG is data of the standard display area, calculating the average load of the unit area based on the average grayscale of the unit area, and calculating the thermal diffusion load of the unit area based on the average load and thermal diffusion ratio of the adjacent unit areas adjacent to the unit area (S150 and S250); compensating the input image data IMG based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal DATA (S300); and displaying an image based on the compensation data signal DATA (S400).

[0126] According to this embodiment, the drive control unit 200 calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area. Therefore, in a display device including an amorphous display area, the accuracy of the average load can be increased.

[0127] In addition, the drive control unit 200 calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area, so that the accuracy of the thermal diffusion load can be increased in the display device including the non-standard display area.

[0128] The accuracy of the average load and the heat diffusion load increases, and thus, the compensation accuracy of the input image data using the average load and the heat diffusion load can be increased. According to this, the display quality of the display panel 100 can be improved.

[0129] Fig.11is a block diagram showing a display device according to an embodiment of the present invention. Figures 12a to 12d It is shown Fig.11 Schematic diagram of various content usage forms of the display panel 100.

[0130] According to the display device of this embodiment, except that the gate driving unit and the data driving unit are arranged in the same direction with respect to the display panel, Figures 1 to 8 The display devices of the present invention are substantially the same, and therefore, the same figure marks are used for the same or similar components, and repeated descriptions are omitted.

[0131] Reference Figures 11 to 12d In the present embodiment, the driving control unit 200 calculates the average load of the unit area based on the average grayscale of the unit area of ​​the display panel 100 and the pixel area ratio of the unit area, and calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area, and compensates the input image data IMG based on the average load of the unit area and the thermal diffusion of the unit area to generate the compensation data signal DATA.

[0132] In this embodiment, the gate driving unit 300 may be disposed adjacent to the long side of the display panel 100. The data driving unit 500 may be disposed adjacent to the long side of the display panel 100. The display panel 100 may include a gate line GL extending in an extending direction of a short side of the display panel 100, a first data line DLH extending in an extending direction of the long side of the display panel 100, and a second data line DLV extending in an extending direction of the short side of the display panel 100.

[0133] exist Fig.11 In the example, the gate driving unit 300 is arranged at the upper end side of the peripheral portion PA of the display panel 100, and the data driving unit 500 is arranged adjacent to the upper bottom side of the display panel 100, but the present invention is not limited to this. Different from this, the gate driving unit 300 can also be arranged at the lower end side of the peripheral portion PA of the display panel 100, and can be arranged at the upper end side and the lower end side of the peripheral portion PA of the display panel 100. In addition, the data driving unit 500 can also be arranged adjacent to the lower bottom side of the display panel 100, and can be arranged adjacent to the upper bottom side and the lower bottom side of the display panel 100.

[0134] The display panel 100 may have a high resolution in the first direction D1. For example, the display panel 100 may be a display inside a car.

[0135] For example, the display panel 100 may include a first display area DA1, a second display area DA2 adjacent to the first display area DA1 in the first direction D1, and a third display area DA3 adjacent to the second display area DA2 in the first direction D1.

[0136] For example, the first display area DA1 may be a display area corresponding to the driver's seat in a display inside the car. For example, the second display area DA2 may be a display area corresponding to the common portion between the driver's seat and the front passenger seat in a display inside the car. For example, the third display area DA3 may be a display area corresponding to the front passenger seat in a display inside the car.

[0137] The first display area DA1, the second display area DA2 and the third display area DA3 may be driven at independent frequencies. For example, when the first display area DA1 displays a static image and the third display area DA3 displays a dynamic image, the first display area DA1 may be driven at a low frequency and the third display area DA3 may be driven at a high frequency.

[0138] To this end, the gate signal applied to the first display area DA1, the gate signal applied to the second display area DA2, and the gate signal applied to the third display area DA3 may be applied independently. For example, the gate signal applied to the first display area DA1, the gate signal applied to the second display area DA2, and the gate signal applied to the third display area DA3 may be shielded independently.

[0139] observe Fig.12a , illustrating a case where the first display area DA1 has a privacy mode, the second display area DA2 has a public mode, and the third display area DA3 has a public mode.

[0140] observe Figure 12b , illustrating a case where the first display area DA1 has a public mode, the second display area DA2 has a public mode, and the third display area DA3 has a privacy mode.

[0141] observe Fig.12c , illustrating a case where the first display area DA1 has a privacy mode, the second display area DA2 has a public mode, and the third display area DA3 has a privacy mode.

[0142] observe Fig.12d , illustrating a case where the first display area DA1 has a common mode, the second display area DA2 has a common mode, and the third display area DA3 has a common mode.

[0143] exist Figures 12a to 12d The display panel 100 is divided into three display areas DA1, DA2, and DA3, but the present invention is not limited thereto. For example, the display panel 100 may be divided into two display areas or four or more display areas. Figures 12a to 12d The example in FIG. 1 shows a case where the multiple display areas DA1, DA2, and DA3 are adjacently arranged in the first direction D1, but the present invention is not limited thereto. For example, the multiple display areas of the display panel 100 are divided in the second direction D2, or in the first and second directions D1 and D2, or in a direction different from the first and second directions D1 and D2.

[0144] For example, the public mode may mean a mode with a wide viewing angle in which a user at the side of the display area also sees the screen, and the privacy mode may mean a mode with a narrow viewing angle in which a user at the side of the display area cannot see the screen.

[0145] In this embodiment, the gate driving unit 300 extends along the long side of the display panel 100, so the content use form (the division direction of the first, second, and third display areas, the first direction D1) and the scanning direction (the first direction D1) become consistent. Therefore, a frequency division driving technology that drives the plurality of display areas DA1, DA2, and DA3 at different driving frequencies can be applied.

[0146] According to this embodiment, the drive control unit 200 calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area. Therefore, in a display device including an amorphous display area, the accuracy of the average load can be increased.

[0147] In addition, the drive control unit 200 calculates the thermal diffusion load of the unit area based on the average load, thermal diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area. Therefore, in the display device including the non-standard display area, the accuracy of the thermal diffusion load can be increased.

[0148] The accuracy of the average load and the heat diffusion load increases, and thus, the compensation accuracy of the input image data using the average load and the heat diffusion load can be increased. According to this, the display quality of the display panel 100 can be improved.

[0149] Fig.13 is a block diagram showing an electronic device according to an embodiment of the present invention.

[0150] Reference Fig.13, the electronic device 1000 may include a processor 1010, a memory device 1020, a storage device 1030, an input / output device 1040, a power source 1050, and a display device 1060. In this case, the display device 1060 may be Figure 1 In addition, the electronic device 1000 may further include various ports that can communicate with a graphics card, a sound card, a memory card, a USB device, etc. or communicate with other systems.

[0151] According to an embodiment, the electronic device 1000 may be implemented as a vehicle display system. However, this is exemplary, and the electronic device 1000 is not limited thereto. For example, the electronic device 1000 may be implemented as a smart phone, a mobile phone, a video phone, a smart tablet, a smart watch, a tablet PC, a vehicle navigation system, a computer display, a notebook computer, a head-mounted display device, etc.

[0152] The processor 1010 may perform a specific calculation or task. According to an embodiment, the processor 1010 may be a microprocessor, a central processing unit, an application processor, etc. The processor 1010 may be connected to other components via an address bus, a control bus, and a data bus, etc. According to an embodiment, the processor 1010 may also be connected to an expansion bus such as a peripheral component interconnect (PCI) bus.

[0153] The processor 1010 may Figure 1 The driving control unit 200 outputs the input image data IMG and the input control signal CONT.

[0154] The memory device 1020 can store data required for the operation of the electronic device 1000 . For example, the memory device 1020 may include an Erasable Programmable Read-Only Memory (EPROM) device, an Electrically Erasable Programmable Read-Only Memory (EEPROM) device, a flash memory device, a Phase Change Random Access Memory (PRAM) device, a Resistance Random Access Memory (RRAM) device, a Nano Floating Gate Memory (NFGM) device, a Polymer Random Access Memory (PoRAM) device, a Magnetic Random Access Memory (MRAM), a Ferroelectric Random Access Memory (FRAM) device, and / or a non-volatile memory device such as a Dynamic Random Access Memory (DRAM) device, a Static Random Access Memory (SRAM) device, or a DRAM device. Volatile memory devices such as Secure Access Memory (SRAM) devices and mobile DRAM devices.

[0155] The storage device 1030 may include a solid state drive (SSD), a hard disk drive (HDD), a CD-ROM, etc. The input-output device 1040 may include input components such as a keyboard, a numeric keypad, a touch pad, a touch screen, a mouse, and output components such as a speaker and a printer. According to an embodiment, the display device 1060 may also be included in the input-output device 1040. The power supply 1050 may provide the power required for the operation of the electronic device 1000. The display device 1060 may be connected to other components via a bus or other communication links.

[0156] According to the display device and the method for driving the display panel of the display device according to the present invention described above, in a display device including an amorphous display area, the average load and the heat diffusion load per unit area can be accurately calculated to improve the display quality of the display panel.

[0157] Although the above description is made with reference to the embodiments, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the concept and scope of the present invention described in the appended claims.

Claims

1. A display device, characterized in that: include: a drive control unit that calculates an average load of the unit area based on an average grayscale of the unit area and a pixel area ratio of the unit area, calculates a thermal diffusion load of the unit area based on an average load, a thermal diffusion ratio, and a weighted value ratio of adjacent unit areas adjacent to the unit area, and compensates input image data based on the average load of the unit area and the thermal diffusion load of the unit area to generate a compensation data signal; A data driving unit, converting the compensation data signal into a data voltage; as well as The display panel displays an image based on the data voltage.

2. The display device according to claim 1, characterized in that The pixel area ratio is determined based on a ratio of a pixel area to a non-pixel area within the unit area.

3. The display device according to claim 2, characterized in that: The drive control section converts the average grayscale of the unit area into a first average load, and determines the average load of the unit area by multiplying the first average load by the pixel area ratio.

4. The display device according to claim 2, characterized in that: The drive control section calculates a pixel area average grayscale by multiplying the average grayscale in the unit area by the pixel area ratio, and converts the pixel area average grayscale into the average duty of the unit area.

5. The display device according to claim 1, characterized in that The thermal diffusion ratio is a ratio of thermal diffusion between adjacent unit areas. As the distance between the first unit region and the central unit region increases, the heat diffusion ratio of the central unit region in the first unit region decreases.

6. The display device according to claim 5, characterized in that: The heat diffusion load of the adjacent unit area adjacent to the central unit area is calculated by multiplying the average load in the central unit area by the heat diffusion ratio of the central unit area and the weighted value ratio of the central unit area.

7. The display device according to claim 6, characterized in that: The smaller the pixel area ratio of the central unit area is, the smaller the weighted value ratio of the central unit area is.

8. The display device according to claim 6, characterized in that: A pixel area ratio of the central unit area is different from the weight value ratio of the central unit area.

9. The display device according to claim 1, characterized in that: The display panel includes a non-standard display area, namely a first display area, and a standard display area, namely a second display area.

10. The display device according to claim 9, characterized in that: At least one of the unit areas of the non-stereotyped display area includes a non-pixel area, All of the unit areas of the fixed display area include only pixel areas.

11. The display device according to claim 9, characterized in that In the case where the input image data is data of the non-standard display area, The drive control unit calculates the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area, and calculates the heat diffusion load of the unit area based on the average load of the adjacent unit area adjacent to the unit area, the heat diffusion ratio and the weighted value ratio.

12. The display device according to claim 9, characterized in that: When the input image data is data of the fixed display area, The drive control section calculates the average load of the unit area based on the average grayscale of the unit area, and calculates the heat diffusion load of the unit area based on the average load of the adjacent unit area adjacent to the unit area and the heat diffusion ratio.

13. The display device according to claim 1, characterized in that: The display device further includes: a gate driving unit, outputting a gate signal to the display panel, The gate driving unit is arranged adjacent to a short side of the display panel. The data driving unit is arranged adjacent to the long side of the display panel. The display panel includes: a gate line extending in an extending direction of the long side of the display panel; and a data line extending in an extending direction of the short side of the display panel.

14. The display device according to claim 1, characterized in that The display device further includes: a gate driving unit, outputting a gate signal to the display panel, The gate driving unit is arranged adjacent to the long side of the display panel. The data driving unit is arranged adjacent to the long side of the display panel. The display panel includes: a gate line extending in an extending direction of a short side of the display panel; a first data line extending in an extending direction of the long side of the display panel; and a second data line extending in an extending direction of the short side of the display panel.

15. A method for driving a display panel, characterized in that: include: The step of calculating the average load of the unit area based on the average grayscale of the unit area and the pixel area ratio of the unit area; The step of calculating the heat diffusion load of the unit area based on the average load, heat diffusion ratio and weighted value ratio of adjacent unit areas adjacent to the unit area; a step of compensating input image data based on the average load of the unit area and the heat diffusion load of the unit area to generate a compensation data signal; as well as The step of displaying an image based on the compensated data signal.

16. The method for driving a display panel according to claim 15, characterized in that: The pixel area ratio is determined based on a ratio of a pixel area to a non-pixel area within the unit area.

17. The method for driving a display panel according to claim 15, wherein: The thermal diffusion ratio is a ratio of thermal diffusion between adjacent unit areas. As the distance between the first unit region and the central unit region increases, the heat diffusion ratio of the central unit region in the first unit region decreases.

18. The method for driving a display panel according to claim 17, wherein: The heat diffusion load of the adjacent unit area adjacent to the central unit area is calculated by multiplying the average load in the central unit area by the heat diffusion ratio of the central unit area and the weighted value ratio of the central unit area.

19. The method for driving a display panel according to claim 18, wherein: The smaller the pixel area ratio of the central unit area is, the smaller the weighted value ratio of the central unit area is.

20. A method for driving a display panel, characterized in that: include: A step of determining whether the input image data is data of a non-stereotyped display area or data of a stereotyped display area; When the input image data is data of the non-standard display area, an average load of the unit area is calculated based on an average grayscale of the unit area and a pixel area ratio of the unit area, and a thermal diffusion load of the unit area is calculated based on an average load, a thermal diffusion ratio and a weighted value ratio of adjacent unit areas adjacent to the unit area; When the input image data is data of the stereotyped display area, the average load of the unit area is calculated based on the average grayscale of the unit area, and the heat diffusion load of the unit area is calculated based on the average load of the adjacent unit areas adjacent to the unit area and the heat diffusion ratio; a step of compensating input image data based on the average load of the unit area and the heat diffusion load of the unit area to generate a compensation data signal; as well as The step of displaying an image based on the compensated data signal.

Images