Display device

Abstract

The display device includes a display panel comprising panel blocks, and a timing controller that determines a target temperature of each panel block based on the average brightness of each panel block, calculates a temperature change amount of each panel block by multiplying the difference between the target temperature of each panel block and the previous predicted temperature of each panel block determined prior to a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each panel block by adding the temperature change amount of each panel block to the previous predicted temperature of each panel block, and compensates input image data based on the current predicted temperature of each panel block. The panel blocks include a first panel block and second panel blocks adjacent to the first panel block, and the block temperature coefficient of the first panel block can be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks.

Description

Technology Field

[0001] The present invention relates to a display device. More specifically, it relates to a display device for predicting temperature. Background Technology

[0002] Generally, a display device includes a display panel, a gate driver, a data driver, and a timing controller. The display panel includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels electrically connected to the plurality of gate lines and the plurality of data lines. The gate driver provides gate signals to the gate lines, the data driver provides data voltages to the data lines, and the timing controller controls the gate driver and the data driver.

[0003] The brightness of an image displayed by a display device can be affected by the temperature of the display panel. However, since the temperature of the display panel is not uniform across all parts, differences in brightness may occur depending on the location of the display panel. Therefore, to improve the above-mentioned differences in brightness, the display device can predict the temperature of the display panel based on input image data.

[0004] However, the temperature at each location on the display panel can be affected by heat transfer (i.e., Newton's law of cooling). Therefore, if the temperature is predicted without considering the effect of heat transfer, the accuracy of the predicted temperature may decrease. The problem to be solved

[0005] One objective of the present invention is to provide a display device that predicts temperature by taking into account heat transfer.

[0006] However, the problem to be solved by the present invention is not limited to the problem mentioned above, and may be expanded in various ways without departing from the spirit and scope of the present invention. means of solving the problem

[0007] To achieve the objective of the present invention, a display device according to embodiments of the present invention comprises a display panel including panel blocks, and a timing controller that determines a target temperature of each of the panel blocks based on the average brightness of each of the panel blocks, calculates a temperature change amount of each of the panel blocks by multiplying the difference between the target temperature of each of the panel blocks and the previous predicted temperature of each of the panel blocks determined prior to a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each of the panel blocks by adding the temperature change amount of each of the panel blocks to the previous predicted temperature of each of the panel blocks, and compensates input image data based on the current predicted temperature of each of the panel blocks. The panel blocks include a first panel block and second panel blocks adjacent to the first panel block, and the block temperature coefficient of the first panel block may be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks.

[0008] In one embodiment, the block temperature coefficient of the first panel block may be larger as the difference between the target temperature of the first panel block and the target temperature of each of the second panel blocks increases.

[0009] In one embodiment, the panel blocks further include third panel blocks that are different from the first panel block and adjacent to the second panel blocks, and the block temperature coefficient of the first panel block can be determined based on the target temperature of the first panel block, the target temperature of each of the second panel blocks, and the target temperature of each of the third panel blocks.

[0010] In one embodiment, the block temperature coefficient of the first panel block may be larger as the difference between the target temperature of the first panel block and the target temperature of each of the second panel blocks is larger, and may be larger as the difference between the target temperature of the first panel block and the target temperature of each of the third panel blocks is larger.

[0011] In one embodiment, the timing controller calculates the preliminary temperature change amount of each panel block by multiplying the difference between the target temperature of each panel block and the previous predicted temperature of each panel block by a preset global temperature coefficient, calculates the preliminary predicted temperature of each panel block by adding the preliminary temperature change amount of each panel block to the previous predicted temperature of each panel block, and determines the block temperature coefficient of each panel block based on the preliminary predicted temperature of each panel block.

[0012] In one embodiment, the block temperature coefficient of the first panel block may be determined based on the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks.

[0013] In one embodiment, the block temperature coefficient of the first panel block may be larger as the difference between the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks increases.

[0014] In one embodiment, the panel blocks are different from the first panel block and further include third panel blocks adjacent to the second panel blocks, and the block temperature coefficient of the first panel block can be determined based on the preliminary predicted temperature of the first panel block, the preliminary predicted temperature of each of the second panel blocks, and the preliminary predicted temperature of each of the third panel blocks.

[0015] In one embodiment, the block temperature coefficient of the first panel block may be larger as the difference between the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks is larger, and may be larger as the difference between the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the third panel blocks is larger.

[0016] In one embodiment, the timing controller stores the accumulated degradation amount generated by accumulating the degradation amount of each of the panel blocks according to the grayscale values ​​of the input image data, and the average brightness may be greater the greater the change in the accumulated degradation amount during the reference period.

[0017] In one embodiment, the timing controller may determine the target temperature using a target temperature lookup table that includes the target temperature corresponding to the average brightness.

[0018] In one embodiment, the timing controller may apply a low-pass filter to the target temperature.

[0019] In one embodiment, a temperature sensor for sensing the ambient temperature of a display panel is included, and the timing controller calculates a final predicted temperature by adding the current predicted temperature of each of the panel blocks to the ambient temperature, and can compensate the input image data based on the final predicted temperature.

[0020] A display device according to embodiments of the present invention includes a display panel comprising panel blocks and a timing controller that determines a target temperature of each of the panel blocks based on the average brightness of each of the panel blocks, calculates a temperature change amount of each of the panel blocks by multiplying the difference between the target temperature of each of the panel blocks and the previous predicted temperature of each of the panel blocks determined before a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each of the panel blocks by adding the temperature change amount of each of the panel blocks to the previous predicted temperature of each of the panel blocks, and compensates input image data based on the current predicted temperature of each of the panel blocks. The panel blocks include a first panel block and second panel blocks that are included in the range of the low-pass filter when a low-pass filter is applied to the first panel block, and the block temperature coefficient of the first panel block may be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks.

[0021] In one embodiment, the timing controller calculates the preliminary temperature change amount of each panel block by multiplying the difference between the target temperature of each panel block and the previous predicted temperature of each panel block by a preset global temperature coefficient, calculates the preliminary predicted temperature of each panel block by adding the preliminary temperature change amount of each panel block to the previous predicted temperature of each panel block, and determines the block temperature coefficient of each panel block based on the preliminary predicted temperature of each panel block.

[0022] In one embodiment, the block temperature coefficient of the first panel block may be determined based on the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks.

[0023] In one embodiment, the timing controller is a formula Using [the formula], a first preliminary temperature coefficient is generated for each of the second panel blocks where the preliminary predicted temperature is higher than or equal to the preliminary predicted temperature of the first panel block, and [the formula] A second preliminary temperature coefficient is generated for each of the second panel blocks in which the preliminary predicted temperature is lower than the preliminary predicted temperature of the first panel block using the above method, and the block temperature coefficient of the first panel block can be calculated by summing the first preliminary temperature coefficient and the second preliminary temperature coefficient (wherein PTC1 is the first preliminary temperature coefficient, PTC2 is the second preliminary temperature coefficient, K is the global temperature coefficient, LPF is the filter value applied to each of the second panel blocks among the filter values ​​of the low-pass filter, and MLPF is the maximum value among the filter values ​​of the low-pass filter).

[0024] In one embodiment, the timing controller stores the accumulated degradation amount generated by accumulating the degradation amount of each of the panel blocks according to the grayscale values ​​of the input image data, and the average brightness may be greater the greater the change in the accumulated degradation amount during the reference period.

[0025] In one embodiment, the timing controller may determine the target temperature using a target temperature lookup table that includes the target temperature corresponding to the average brightness.

[0026] In one embodiment, the timing controller may apply the low-pass filter to the target temperature. Effects of the invention

[0027] A display device according to embodiments of the present invention includes a timing controller that determines a target temperature of each panel block based on the average brightness of each panel block, calculates a temperature change amount of each panel block by multiplying the difference between the target temperature of each panel block and the previous predicted temperature of each panel block determined prior to a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each panel block by adding the temperature change amount of each panel block to the previous predicted temperature of each panel block, and compensates input image data based on the current predicted temperature of each panel block. The panel blocks include a first panel block and second panel blocks adjacent to the first panel block, and the block temperature coefficient of the first panel block can be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks. Accordingly, the display device can predict the temperature of the display panel by considering heat transfer.

[0028] A display device according to embodiments of the present invention comprises panel blocks including a first panel block and second panel blocks that are included within the range of a low-pass filter when a low-pass filter is applied to the first panel block, and the block temperature coefficient of the first panel block can be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks. Accordingly, the display device can predict the temperature of the thermal display panel through the low-pass filter. In addition, the display device can predict the temperature of the display panel by considering heat transfer.

[0029] However, the effects of the present invention are not limited to the effects described above and may be extended in various ways without departing from the spirit and scope of the present invention. Brief explanation of the drawing

[0030] FIG. 1 is a block diagram showing a display device according to embodiments of the present invention. Figure 2 is a diagram showing an example of a timing controller of the display device of Figure 1. Figure 3 is a diagram showing an example of a temperature prediction unit of the display device of Figure 1. Figure 4 is a drawing showing an example of a display panel of the display device of Figure 1. FIG. 5 is a drawing showing an example of a display panel of a display device according to embodiments of the present invention. FIG. 6 is a diagram showing an example of a temperature prediction unit of a display device according to embodiments of the present invention. FIG. 7 is a drawing showing an example of a low-pass filter of a display device according to embodiments of the present invention. Figure 8 is a drawing showing an example of a display panel of the display device of Figure 7. FIG. 9 is a diagram showing an example in which the display device of FIG. 7 determines the block temperature coefficient of the first panel block using a low-pass filter. FIG. 10 is a block diagram showing an electronic device according to embodiments of the present invention. Figure 11 is a diagram showing an example in which the electronic device of Figure 10 is implemented as a smartphone. Specific details for implementing the invention

[0031] Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

[0032] FIG. 1 is a block diagram showing a display device (1000) according to embodiments of the present invention.

[0033] Referring to FIG. 1, the display device (1000) may include a display panel (100), a timing controller (200), a gate driver (300), a data driver (400), and a temperature sensor (500). In one embodiment, the timing controller (200) and the data driver (400) may be integrated on a single chip.

[0034] The display panel (100) may include a display portion (AA) for displaying images and a peripheral portion (PA) positioned adjacent to the display portion (AA). In one embodiment, a gate driver (300) may be mounted on the peripheral portion (PA).

[0035] A display panel (100) may include a plurality of gate lines (GL), a plurality of data lines (DL), and a plurality of pixels (P) electrically connected to 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) that intersects the first direction (D1).

[0036] The timing controller (200) can receive input image data (IMG) and input control signals (CONT) from a host processor (e.g., a graphic processing unit (GPU), etc.). For example, the input image data (IMG) may include red image data, green image data, and blue image data. In one embodiment, the input image data (IMG) may further include white image data. In another example, the input image data (IMG) may include magenta image data, yellow image data, and cyan image data. The input control signals (CONT) may include a master clock signal and a data enable signal. The input control signals (CONT) may further include a vertical synchronization signal and a horizontal synchronization signal.

[0037] The timing controller (200) can generate a first control signal (CONT1), a second control signal (CONT2), and a data signal (DATA) based on input image data (IMG) and an input control signal (CONT).

[0038] The timing controller (200) can generate a first control signal (CONT1) to control the operation of the gate driver (300) based on an input control signal (CONT) and output it to the gate driver (300). The first control signal (CONT1) may include a vertical start signal and a gate clock signal.

[0039] The timing controller (200) can generate a second control signal (CONT2) to control the operation of the data driver (400) based on an input control signal (CONT) and output it to the data driver (400). The second control signal (CONT2) may include a horizontal start signal and a load signal.

[0040] The timing controller (200) can receive input image data (IMG) and an input control signal (CONT) to generate a data signal (DATA). The timing controller (200) can output the data signal (DATA) to a data driver (400).

[0041] The gate driver (300) can generate gate signals to drive gate lines (GL) in response to a first control signal (CONT1) received from the timing controller (200). The gate driver (300) can output the gate signals to the gate lines (GL). For example, the gate driver (300) can output the gate signals to the gate lines (GL) sequentially.

[0042] The data driver (400) can receive a second control signal (CONT2) and a data signal (DATA) from the timing controller (200). The data driver (400) can generate data voltages by converting the data signal (DATA) into an analog voltage. The data driver (400) can output the data voltages to the data line (DL).

[0043] A temperature sensor (500) can sense the ambient temperature (AT) of the display panel (100). The temperature sensor (500) can output the ambient temperature (AT) to the timing controller (200). In one embodiment, the timing controller (200) can compensate the ambient temperature (AT) so that the temperature of the display panel (100) and the ambient temperature (AT) are the same when the display panel (100) displays a black image. The timing controller (200) can calculate the final predicted temperature based on the ambient temperature (AT). A detailed explanation of this will be provided later.

[0044] FIG. 2 is a drawing showing an example of a timing controller (200) of a display device (1000) of FIG. 1. FIG. 3 is a drawing showing an example of a temperature prediction unit (240) of a display device (1000) of FIG. 1.

[0045] Referring to FIGS. 1 to 3, the timing controller (200) determines the target temperature (TT) of each panel block based on the average brightness (AL) of each panel block, calculates the temperature change amount (CT) of each panel block by multiplying the difference between the target temperature (TT) of each panel block and the previous predicted temperature (PT) of each panel block determined before the reference period by the block temperature coefficient of the panel blocks, calculates the current predicted temperature (CPT) of each panel block by adding the temperature change amount (CT) of each panel block to the previous predicted temperature (PT) of each panel block, and can compensate the input image data (IMG) based on the current predicted temperature (CPT) of each panel block.

[0046] The display panel (100) may include pixels (P) separated into panel blocks. For example, one panel block may include multiple pixels (P). For example, the display panel (100) may include multiple panel blocks.

[0047] The timing controller (200) can calculate the current predicted temperature for each of the panel blocks at reference periods. The timing controller (200) can calculate the final predicted temperature by adding the current predicted temperature for each of the panel blocks to the ambient temperature (AT). The timing controller (200) can predict the temperature of the display panel (100) based on the final predicted temperature. For example, the predicted temperature of the display panel (100) can become the final predicted temperature over time.

[0048] The timing controller (200) may include a degradation amount accumulation unit (210), a change amount calculation unit (220), a brightness calculation unit (230), a temperature prediction unit, and a compensation unit (250).

[0049] The degradation amount accumulation unit (210) can store the accumulated degradation amount (AD) generated by accumulating the degradation amount of each panel block according to the grayscale values ​​of the input image data (IMG). For example, the degradation amount accumulation unit (210) can calculate the degradation amount by multiplying the grayscale values ​​of the input image data by a degradation grayscale coefficient for each grayscale value. For example, the degradation grayscale coefficient may have preset values ​​according to the grayscale values.

[0050] In one embodiment, the degradation amount accumulation unit (210) calculates the grayscale degradation amount by multiplying the grayscale values ​​of the input image data (IMG) by a grayscale coefficient for each grayscale value, calculates the temperature degradation amount by multiplying the final predicted temperature (FPT) by a preset degradation temperature coefficient, and calculates the degradation amount by multiplying the grayscale degradation amount and the temperature degradation amount. At this time, if the current predicted temperature (CPT) of each panel block has not yet been calculated, the degradation amount accumulation unit (210) calculates the degradation amount and the accumulated degradation amount (AD) using the previous predicted temperature (PT) of each panel block, and updates the degradation amount and the accumulated degradation amount (AD) after the current predicted temperature (CPT) of each panel block has been calculated.

[0051] The change amount calculation unit (220) can store the accumulated deterioration amount (AD) prior to the reference period. The change amount calculation unit (220) can calculate the change amount (CAD) of the accumulated deterioration amount (AD) during the reference period.

[0052] The luminance calculation unit (230) can determine the average luminance (AL) based on the change amount (CAD) of the cumulative degradation amount (AD). For example, the luminance calculation unit (230) can determine the average luminance (AL) of each panel block during a reference period.

[0053] The average luminance (AL) can be greater as the change in the cumulative degradation amount (AD) (CAD) during the reference period increases. Therefore, the luminance calculation unit (230) can calculate the average luminance (AL) using the change in the cumulative degradation amount (AD) (CAD).

[0054] The temperature prediction unit (240) can calculate the final predicted temperature (FPT) based on the average luminance (AL) and ambient temperature (AT). The temperature prediction unit (240) can output the final predicted temperature (FPT) to the degradation amount accumulation unit (210). A detailed explanation of this will be provided later.

[0055] The compensation unit (250) can compensate for the input image data (IMG) based on the accumulated degradation amount (AD). The brightness of the image may be distorted depending on the degree of degradation of the display panel (100). Accordingly, the compensation unit (250) can compensate for the degradation of the display panel (100) (i.e., degradation of the pixels (P)) through the accumulated degradation amount (AD).

[0056] Referring to FIG. 3, the temperature prediction unit (240) may include a target temperature determination unit (241), a temperature change amount calculation unit (242), a current predicted temperature calculation unit (243), and a final temperature calculation unit (244).

[0057] The target temperature determination unit (241) can determine the target temperature (TT) of each panel block based on the average luminance (AL) of each panel block. The target temperature determination unit (241) can determine the target temperature (TT) of each panel block using a target temperature lookup table (TT LUT) that includes the target temperature (TT) corresponding to the average luminance (AL). For example, the target temperature (TT) of each panel block may be higher as the average luminance (AL) increases.

[0058] In one embodiment, the target temperature determining unit (241) may apply a low-pass filter to the target temperature (TT) of each panel block. By applying a low-pass filter to the target temperature (TT) of each panel block, the target temperature determining unit (241) may determine the target temperature (TT) of each panel block by taking into account heat transfer.

[0059] The temperature change amount calculation unit (242) can calculate the temperature change amount (CT) of each panel block by multiplying the difference between the target temperature (TT) of each panel block and the previous predicted temperature (PT) of each panel block determined before the reference period by the block temperature coefficient of the panel blocks.

[0060] For example, the previous predicted temperature (PT) of each panel block may be the predicted temperature of each panel block determined prior to the reference period. For example, the current predicted temperature (CPT) of each panel block may be the predicted temperature of each panel block currently determined.

[0061] For example, the temperature change (CT) of each panel block is

[0062] [formula]

[0063]

[0064] It can be calculated using [this]. Here, CT is the temperature change amount of each panel block, BK is the block temperature coefficient, PT is the previous predicted temperature, and TT may be the target temperature of each panel block.

[0065] The current predicted temperature calculation unit (243) can calculate the current predicted temperature (CPT) of each panel block by adding the temperature change amount (CT) of each panel block to the previous predicted temperature (PT) of each panel block.

[0066] For example, the current predicted temperature (CPT) of each panel block is

[0067] [formula]

[0068]

[0069] It can be calculated using [this]. Here, CBT is the current predicted temperature of each panel block, PT is the previous predicted temperature of each panel block, and CT is the temperature change amount (CT) of each panel block.

[0070] The final temperature calculation unit (244) can calculate the final predicted temperature (FPT) by adding the current predicted temperature (CPT) to the ambient temperature (AT).

[0071] FIG. 4 is a drawing showing an example of a display panel (100) of a display device (1000) of FIG. 1.

[0072] Referring to FIGS. 1 through 4, panel blocks may include a first panel block (PB1) and second panel blocks (PB2) adjacent to the first panel block (PB1). The block temperature coefficient of the first panel block (PB1) may be determined based on the target temperature (TT) of the first panel block (PB1) and the target temperature (TT) of each of the second panel blocks (PB2).

[0073] For example, the temperature change (CT) of each panel block is

[0074] [formula]

[0075]

[0076] It can be calculated using [this]. Here, CT is the temperature change amount of each panel block, BK is the block temperature coefficient, PT is the previous predicted temperature, and TT may be the target temperature of each panel block. The block temperature coefficient of the first panel block (PB1) may be larger as the difference between the target temperature (TT) of the first panel block (PB1) and the target temperature (TT) of each of the second panel blocks (PB2) increases.

[0077] That is, a relatively high block temperature coefficient can be applied to a panel block that has a large temperature difference from surrounding panel blocks. Therefore, the display device (1000) can predict the temperature by taking heat transfer into account.

[0078] FIG. 5 is a drawing showing an example of a display panel (100) of a display device according to embodiments of the present invention.

[0079] Since the display device according to the embodiments is substantially identical to the configuration of the display device (1000) of FIG. 1 except for the third panel block (PB3), the same reference numbers and reference symbols are used for identical or similar components, and redundant descriptions are omitted.

[0080] Referring to FIGS. 1 through 3 and FIG. 5, the panel blocks may further include third panel blocks (PB3) that are different from the first panel block (PB1) and adjacent to the second panel blocks (PB2). The block temperature coefficient of the first panel block (PB1) may be determined based on the target temperature (TT) of the first panel block, the target temperature (TT) of each of the second panel blocks (PB2), and the target temperature (TT) of each of the third panel blocks (PB3).

[0081] For example, the temperature change (CT) of each panel block is

[0082] [formula]

[0083]

[0084] It can be calculated using [this]. Here, CT is the temperature change amount of each panel block, BK is the block temperature coefficient, PT is the previous predicted temperature, and TT is the target temperature of each panel block. The block temperature coefficient of the first panel block (PB1) may be larger as the difference between the target temperature (TT) of the first panel block (PB1) and the target temperature (TT) of each of the second panel blocks (PB2) is larger, and may be larger as the difference between the target temperature (TT) of the first panel block (PB1) and the target temperature (TT) of each of the third panel blocks (PB3) is larger.

[0085] That is, a relatively high block temperature coefficient can be applied to a panel block that has a large temperature difference from surrounding panel blocks. Therefore, the display device (1000) can predict the temperature by taking heat transfer into account.

[0086] FIG. 6 is a drawing showing an example of a temperature prediction unit (240) of a display device according to embodiments of the present invention.

[0087] Since the display device according to the embodiments is substantially identical to the configuration of the display device (1000) of FIG. 1, except for the preliminary temperature change amount calculation unit (245), the preliminary predicted temperature calculation unit (246), and the block temperature coefficient determination unit (247), the same reference numbers and reference symbols are used for identical or similar components, and redundant descriptions are omitted.

[0088] Referring to FIGS. 1, FIGS. 2, and FIGS. 6, the timing controller (200) calculates the preliminary temperature change amount (PCT) of each panel block by multiplying the difference between the target temperature (TT) of each panel block and the previous predicted temperature (PT) of each panel block by a preset global temperature coefficient (K), calculates the preliminary predicted temperature (PPT) of each panel block by adding the preliminary temperature change amount (PCT) of each panel block to the previous predicted temperature (PT) of each panel block, and determines the block temperature coefficient (BK) of each panel block based on the preliminary predicted temperature (PPT) of each panel block.

[0089] Referring to FIG. 6, the temperature prediction unit (240) may further include a preliminary temperature change amount calculation unit (245), a preliminary predicted temperature calculation unit (246), and a block temperature coefficient determination unit (247).

[0090] The preliminary temperature change calculation unit (245) can calculate the preliminary temperature change amount (PCT) of each panel block by multiplying the difference between the target temperature (TT) of each panel block and the previous predicted temperature (PT) of each panel block determined before the reference period by a global temperature coefficient (K). Unlike the block temperature coefficient, the global temperature coefficient (K) may not vary according to the temperature of surrounding panel blocks.

[0091] The preliminary predicted temperature calculation unit (246) can calculate the preliminary predicted temperature (PPT) of each panel block by adding the preliminary temperature change amount (PCT) of each panel block to the previous predicted temperature (PT) of each panel block.

[0092] The block temperature coefficient determining unit (247) can determine the block temperature coefficient (BK) of each panel block based on the preliminary predicted temperature (PPT) of each panel block.

[0093] That is, the calculation of the preliminary predicted temperature (PPT) can be the same as the calculation of the current predicted temperature (CPT), except that it uses the global temperature coefficient (K).

[0094] Referring to FIGS. 4 and 6, in one embodiment, the block temperature coefficient (BK) of the first panel block (PB1) may be determined based on the preliminary predicted temperature (PPT) of the first panel block (PB1) and the preliminary predicted temperature (PPT) of each of the second panel blocks (PB2). For example, the block temperature coefficient (BK) of the first panel block (PB1) may be larger as the difference between the preliminary predicted temperature (PPT) of the first panel block (PB1) and the preliminary predicted temperature (PPT) of each of the second panel blocks (PB2) increases.

[0095] Referring to FIGS. 5 and 6, in another embodiment, the block temperature coefficient (BK) of the first panel block may be determined based on the preliminary predicted temperature (PPT) of the first panel block (PB1), the preliminary predicted temperature (PPT) of each of the second panel blocks (PB2), and the preliminary predicted temperature (PPT) of each of the third panel blocks (PB3). The block temperature coefficient (BK) of the first panel block (PB1) may be larger as the difference between the preliminary predicted temperature (PPT) of the first panel block (PB1) and the preliminary predicted temperature (PPT) of each of the second panel blocks (PB2) is greater, and may be larger as the difference between the preliminary predicted temperature (PPT) of the first panel block (PB1) and the preliminary predicted temperature (PPT) of each of the third panel blocks (PB3) is greater.

[0096] That is, the display device can use a target temperature (TT) and a global temperature coefficient (K) to obtain the temperature difference with surrounding panel blocks. Then, the display device determines the block temperature coefficient (BK) of each panel block through the temperature difference and can predict the temperature by considering heat transfer.

[0097] FIG. 7 is a drawing showing an example of a low-pass filter (LPF) of a display device according to embodiments of the present invention. FIG. 8 is a drawing showing an example of a display panel (100) of the display device of FIG. 7. FIG. 9 is a drawing showing an example of the display device of FIG. 7 determining a block temperature coefficient (BK) of a first panel block using a low-pass filter. The numbers of the low-pass filter (LPF) in FIG. 7 and FIG. 9 are filter values ​​of the low-pass filter (LPF), and the numbers of the panel blocks in FIG. 8 and FIG. 9 are preliminary predicted temperatures (PPT) of each panel block.

[0098] Since the display device according to the embodiments is substantially the same as the configuration of the display device of FIG. 6, except for the determination of the panel blocks and the block temperature coefficient (BK), the same reference numbers and reference symbols are used for identical or similar components, and redundant descriptions are omitted.

[0099] Referring to FIGS. 6 through 8, panel blocks may include a first panel block (PB1) and second panel blocks (PB2) that are included within the range of the low-pass filter (LPF) when the low-pass filter (LPF) is applied to the first panel block (PB1). The block temperature coefficient (BK) of the first panel block (PB1) may be determined based on the target temperature (TT) of the first panel block (PB1) and the target temperature (TT) of each of the second panel blocks (PB2).

[0100] For example, the low-pass filter (LPF) may have 25 filter values. The size of the low-pass filter (LPF) may be 5x5. In this case, the first panel block (PB1) and the second panel blocks (PB2) may be as shown in FIG. 8.

[0101] The timing controller (200) is

[0102] [Formula 1]

[0103]

[0104] Using this, a first preliminary temperature coefficient is generated for each of the second panel blocks (PB2) in which the preliminary predicted temperature (PPT) is higher than or equal to the preliminary predicted temperature (PPT) of the first panel block (PB1), and

[0105] [Formula 2]

[0106]

[0107] A second preliminary temperature coefficient is generated for each of the second panel blocks (PB2) in which the preliminary predicted temperature (PPT) is lower than the preliminary predicted temperature (PPT) of the first panel block (PB1), and the block temperature coefficient (BK) of the first panel block (PB1) can be calculated by summing the first preliminary temperature coefficient and the second preliminary temperature coefficient. Here, PTC1 is the first preliminary temperature coefficient, PTC2 is the second preliminary temperature coefficient, K is the global temperature coefficient, LPF is the filter value applied to each of the second panel blocks among the filter values ​​of the low-pass filter, and MLPF may be the maximum value among the filter values ​​of the low-pass filter.

[0108] Referring to FIGS. 6 and FIGS. 9, it is assumed that K is 1. The second panel blocks (PB2) of FIG. 9 may have a lower preliminary predicted temperature (PPT) than the first panel block (PB1), except for the (m3, n3) panel block. Thus, the second preliminary temperature coefficient for the (m1, n1), (m2, n1), (m3, n1), (m4, n1), (m5, n1), (m1, n2), (m5, n2), (m1, n3), (m5, n3), (m1, n4), (m5, n4), (m1, n5), (m2, n5), (m3, n5), (m4, n5), and (m5, n5) panel blocks may be 1*10 / 1*1 / 5 = 2. And, the second preliminary temperature coefficient for the panel blocks (m2, n2), (m3, n2), (m4, n2), (m2, n3), (m4, n3), (m2, n4), (m3, n4), and (m4, n4) can be 1*10 / 1*3 / 5 = 6. The first preliminary temperature coefficient for the panel block (m3, n3) can be 1*10 / 10*5 / 5 = 1. Therefore, the block temperature coefficient (BK) of the first panel block (PB1) can be (2*16)+(3*8)+(1*1) = 57.

[0109] In other words, a relatively high block temperature coefficient can be applied to panel blocks with a large temperature difference from surrounding panel blocks. Therefore, the display device can predict the temperature by considering heat transfer.

[0110] FIG. 10 is a block diagram showing an electronic device according to embodiments of the present invention, and FIG. 11 is a diagram showing an example in which the electronic device of FIG. 10 is implemented as a smartphone.

[0111] Referring to FIGS. 10 and 11, the electronic device (2000) may include a processor (2010), a memory device (2020), a storage device (2030), an input / output device (2040), a power supply (2050), and a display device (2060). In this case, the display device (2060) may be the display device (1000) of FIG. 1. Additionally, the electronic device (2000) may further include several ports capable of communicating with a video card, sound card, memory card, USB device, etc., or communicating with other systems. In one embodiment, as shown in FIG. 11, the electronic device (2000) may be implemented as a smartphone. However, this is exemplary and the electronic device (2000) is not limited thereto. For example, the electronic device (2000) may be implemented as a mobile phone, video phone, smart pad, smart watch, tablet PC, vehicle navigation system, computer monitor, laptop, head-mounted display device, etc.

[0112] The processor (2010) can perform specific calculations or tasks. According to an embodiment, the processor (2010) may be a microprocessor, a central processing unit, an application processor, etc. The processor (2010) may be connected to other components via an address bus, a control bus, a data bus, etc. According to an embodiment, the processor (2010) may also be connected to an expansion bus such as a Peripheral Component Interconnect (PCI) bus.

[0113] The memory device (2020) can store data necessary for the operation of the electronic device (2000). For example, the memory device (2020) may include non-volatile memory devices such as an Erasable Programmable Read-Only Memory (EPROM) device, an Electrically Erasable Programmable Read-Only Memory (EEEPROM) 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) device, a Ferroelectric Random Access Memory (FRAM) device, and / or volatile memory devices such as a Dynamic Random Access Memory (DRAM) device, a Static Random Access Memory (SRAM) device, a mobile DRAM device, etc.

[0114] The storage device (2030) may include a solid state drive (SSD), a hard disk drive (HDD), a CD-ROM, etc.

[0115] The input / output device (2040) may include input means such as a keyboard, keypad, touchpad, touchscreen, mouse, etc., and output means such as a speaker, printer, etc. According to an embodiment, a display device (2060) may be included in the input / output device (2040).

[0116] The power supply (2050) can supply power required for the operation of the electronic device (2000). For example, the power supply (2050) may be a power management integrated circuit (PMIC).

[0117] The display device (2060) can display an image corresponding to the visual information of the electronic device (2000). At this time, the display device (2060) may be an organic light-emitting display device or a quantum dot light-emitting display device, but is not limited thereto. The display device (2060) may be connected to other components through the buses or other communication links. At this time, the display device (2060) can predict the temperature of the display panel by taking into account heat transfer.

[0118] In one embodiment, the display device (2060) includes a display panel comprising panel blocks, and a timing controller that determines a target temperature of each panel block based on the average brightness of each panel block, calculates a temperature change amount of each panel block by multiplying the difference between the target temperature of each panel block and the previous predicted temperature of each panel block determined before a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each panel block by adding the temperature change amount of each panel block to the previous predicted temperature of each panel block, and compensates input image data based on the current predicted temperature of each panel block. The panel blocks include a first panel block and second panel blocks adjacent to the first panel block, and the block temperature coefficient of the first panel block may be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks. However, since this has already been explained with reference to FIGS. 1 to 6, a redundant explanation thereof will be omitted.

[0119] In another embodiment, the display device (2060) includes a display panel comprising panel blocks, and a timing controller that determines the target temperature of each panel block based on the average brightness of each panel block, calculates the temperature change amount of each panel block by multiplying the difference between the target temperature of each panel block and the previous predicted temperature of each panel block determined before a reference period by the block temperature coefficient of the panel blocks, calculates the current predicted temperature of each panel block by adding the temperature change amount of each panel block to the previous predicted temperature of each panel block, and compensates the input image data based on the current predicted temperature of each panel block. The panel blocks include a first panel block and second panel blocks that are included in the range of the low-pass filter when a low-pass filter is applied to the first panel block, and the block temperature coefficient of the first panel block may be determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks. However, since this has already been explained with reference to FIGS. 7 to 9, a redundant explanation thereof will be omitted. Industrial applicability

[0120] The present invention may be applied to display devices and electronic devices including the same. For example, the present invention may be applied to digital TVs, 3D TVs, mobile phones, smartphones, tablet computers, VR devices, PCs, home electronic devices, laptop computers, PDAs, PMPs, digital cameras, music players, portable game consoles, navigation systems, etc.

[0121] Although the invention has been described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims. Explanation of the symbols

[0122] 2000: Electronic devices 2010: Processors 2020: Memory device 2030: Storage device 2040: Input / Output Device 2050: Power Supply Device 2060, 1000: Display device 1100: Display panel driver 100: Display panel 200: Timing controller 210: Deterioration Amount Accumulation Section 220: Change Amount Calculation Section 230: Luminance calculation unit 240: Temperature prediction unit 241: Target temperature determination unit 242: Temperature change amount calculation unit 243: Current predicted temperature calculation unit 244: Final temperature calculation unit 245: Preliminary temperature change calculation unit 246: Preliminary predicted temperature calculation unit 247: Block temperature coefficient determination unit 250: Compensation Department 300: Gate Driver 400: Data driver 500: Temperature sensor

Claims

Claim 1 A display device comprising: a display panel including panel blocks; and a timing controller that determines a target temperature of each of the panel blocks based on the average brightness of each of the panel blocks, calculates a temperature change amount of each of the panel blocks by multiplying the difference between the target temperature of each of the panel blocks and the previous predicted temperature of each of the panel blocks determined prior to a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each of the panel blocks by adding the temperature change amount of each of the panel blocks to the previous predicted temperature of each of the panel blocks, and compensates input image data based on the current predicted temperature of each of the panel blocks, wherein the panel blocks include a first panel block and second panel blocks adjacent to the first panel block, wherein the block temperature coefficient of the first panel block is determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks, and wherein the block temperature coefficient of the first panel block is larger as the difference between the target temperature of the first panel block and the target temperature of each of the second panel blocks is larger. Claim 2 delete Claim 3 A display device according to claim 1, wherein the panel blocks further include third panel blocks that are different from the first panel block and adjacent to the second panel blocks, and the block temperature coefficient of the first panel block is determined based on the target temperature of the first panel block, the target temperature of each of the second panel blocks, and the target temperature of each of the third panel blocks. Claim 4 A display device according to claim 3, wherein the block temperature coefficient of the first panel block is larger as the difference between the target temperature of the first panel block and the target temperature of each of the second panel blocks is larger, and is larger as the difference between the target temperature of the first panel block and the target temperature of each of the third panel blocks is larger. Claim 5 A display device according to claim 1, wherein the timing controller calculates a preliminary temperature change amount for each of the panel blocks by multiplying the difference between the target temperature of each of the panel blocks and the previous predicted temperature of each of the panel blocks by a preset global temperature coefficient, calculates a preliminary predicted temperature for each of the panel blocks by adding the preliminary temperature change amount for each of the panel blocks to the previous predicted temperature of each of the panel blocks, and determines a block temperature coefficient for each of the panel blocks based on the preliminary predicted temperature of each of the panel blocks. Claim 6 A display device according to claim 5, characterized in that the block temperature coefficient of the first panel block is determined based on the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks. Claim 7 A display device according to claim 6, characterized in that the block temperature coefficient of the first panel block is larger as the difference between the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks becomes larger. Claim 8 A display device according to claim 6, wherein the panel blocks are different from the first panel block and further include third panel blocks adjacent to the second panel blocks, and the block temperature coefficient of the first panel block is determined based on the preliminary predicted temperature of the first panel block, the preliminary predicted temperature of each of the second panel blocks, and the preliminary predicted temperature of each of the third panel blocks. Claim 9 A display device according to claim 8, wherein the block temperature coefficient of the first panel block is larger as the difference between the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks is larger, and is larger as the difference between the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the third panel blocks is larger. Claim 10 A display device according to claim 1, wherein the timing controller stores an accumulated degradation amount generated by accumulating the degradation amount of each of the panel blocks according to the grayscale values ​​of the input image data, and the average brightness is greater the greater the change in the accumulated degradation amount during the reference period. Claim 11 A display device according to claim 1, characterized in that the timing controller determines the target temperature using a target temperature lookup table including the target temperature corresponding to the average brightness. Claim 12 A display device according to claim 11, wherein the timing controller applies a low-pass filter to the target temperature. Claim 13 A display device according to claim 1, comprising a temperature sensor that senses the ambient temperature of a display panel, wherein the timing controller calculates a final predicted temperature by adding the current predicted temperature of each of the panel blocks to the ambient temperature, and compensates the input image data based on the final predicted temperature. Claim 14 A display device comprising: a display panel including panel blocks; and a timing controller that determines a target temperature of each of the panel blocks based on the average brightness of each of the panel blocks, calculates a temperature change amount of each of the panel blocks by multiplying the difference between the target temperature of each of the panel blocks and the previous predicted temperature of each of the panel blocks determined prior to a reference period by a block temperature coefficient of the panel blocks, calculates a current predicted temperature of each of the panel blocks by adding the temperature change amount of each of the panel blocks to the previous predicted temperature of each of the panel blocks, and compensates input image data based on the current predicted temperature of each of the panel blocks, wherein the panel blocks include a first panel block and second panel blocks included within the range of the low-pass filter when a low-pass filter is applied to the first panel block, wherein the block temperature coefficient of the first panel block is determined based on the target temperature of the first panel block and the target temperature of each of the second panel blocks, and wherein the block temperature coefficient of the first panel block is larger as the difference between the target temperature of the first panel block and the target temperature of each of the second panel blocks is larger. Claim 15 A display device according to claim 14, wherein the timing controller calculates a preliminary temperature change amount for each of the panel blocks by multiplying the difference between the target temperature of each of the panel blocks and the previous predicted temperature of each of the panel blocks by a preset global temperature coefficient, calculates a preliminary predicted temperature for each of the panel blocks by adding the preliminary temperature change amount for each of the panel blocks to the previous predicted temperature of each of the panel blocks, and determines a block temperature coefficient for each of the panel blocks based on the preliminary predicted temperature of each of the panel blocks. Claim 16 A display device according to claim 15, characterized in that the block temperature coefficient of the first panel block is determined based on the preliminary predicted temperature of the first panel block and the preliminary predicted temperature of each of the second panel blocks. Claim 17 In claim 16, the timing controller is a formula Using the formula, a first preliminary temperature coefficient is generated for each of the second panel blocks where the preliminary predicted temperature is higher than or equal to the preliminary predicted temperature of the first panel block, and a formula A display device characterized by generating a second preliminary temperature coefficient for each of the second panel blocks, wherein the preliminary predicted temperature is lower than the preliminary predicted temperature of the first panel block, using the method, and calculating the block temperature coefficient of the first panel block by summing the first preliminary temperature coefficient and the second preliminary temperature coefficient (wherein PTC1 is the first preliminary temperature coefficient, PTC2 is the second preliminary temperature coefficient, K is the global temperature coefficient, LPF is the filter value applied to each of the second panel blocks among the filter values ​​of the low-pass filter, and MLPF is the maximum value among the filter values ​​of the low-pass filter). Claim 18 A display device according to claim 14, wherein the timing controller stores an accumulated degradation amount generated by accumulating the degradation amount of each of the panel blocks according to the grayscale values ​​of the input image data, and the average brightness is greater the greater the change in the accumulated degradation amount during the reference period. Claim 19 A display device according to claim 14, wherein the timing controller determines the target temperature using a target temperature lookup table that includes the target temperature corresponding to the average brightness. Claim 20 A display device according to claim 14, wherein the timing controller applies the low-pass filter to the target temperature.

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