Brightness compensation device, brightness compensation method, and display device

Abstract

The present application relates to a luminance compensation device, a luminance compensation method and a display device, wherein the luminance compensation device comprises: a panel current prediction device, which obtains a current APL interval average value based on image data provided to a panel, and obtains a predicted panel current based on a maximum panel current and the current APL interval average value; a current sensor, which is connected to a power line on the panel and detects an actual panel current; and a luminance compensation unit, which compares the predicted panel current with the actual panel current to obtain luminance compensation information, and adjusts the image data based on the luminance compensation information to obtain compensated image data. Thus, power consumption can be reduced.

Description

Technical Field

[0001] This disclosure relates to a brightness compensation device, method, and display device. Background Technology

[0002] Recently, there has been an explosive increase in interest in display devices used in mobile phones, tablet TVs, MP3 players, and other similar devices. These display devices include liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs).

[0003] The panel of the display device includes a plurality of pixels, and each pixel is individually illuminated to display an image.

[0004] The current flowing through the panel, or panel current, varies with temperature. For example, if the panel temperature increases, the carrier mobility of the thin-film transistors on the panel increases or the threshold voltage decreases.

[0005] As a result, more current flows through each pixel, increasing the panel current. With the increase in panel current, the brightness also increases.

[0006] As the current in the panel increases, there is a problem of increased power consumption.

[0007] In addition, with the increase in panel current, there is a long-term problem of shortened panel lifespan.

[0008] In addition, the image data is distorted due to brightness exceeding the required level, resulting in poor image quality. Summary of the Invention

[0009] This disclosure is intended to address the aforementioned problems and other issues.

[0010] Therefore, this disclosure provides a brightness compensation device, method, and display device that can reduce power consumption.

[0011] In addition, this disclosure provides a brightness compensation device, method, and display device that can increase lifespan.

[0012] In addition, this disclosure provides a brightness compensation device, method, and display device that can improve image quality.

[0013] This disclosure is not limited to what is described, but includes what can be understood from the disclosed description.

[0014] To achieve the aforementioned or other objectives, according to one aspect, a brightness compensation device includes: a panel current prediction device that acquires an average value of a current APL (average image level) range based on image data provided to the panel, and acquires a predicted panel current based on a maximum panel current and the acquired average value of the current APL range; a current sensor connected to a power line on the panel and detecting the actual panel current; and a brightness compensation unit that compares the acquired predicted panel current with the detected actual panel current to acquire brightness compensation information, and adjusts the image data based on the acquired brightness compensation information to acquire compensated image data.

[0015] The average value of the current APL interval can be the average value obtained for multiple frames within the first interval; the actual panel current can be the average value of the panel current obtained for multiple frames within the second interval.

[0016] The predicted panel current can be the average value of the current APL interval when the average value of the current APL interval has a normalized value between 0 and 100 and the current APL corresponding to the maximum panel current has a normalized value of 100.

[0017] The current sensor may include: a shunt resistor connected to the power line to generate a voltage difference; and a current sensing circuit to obtain the actual panel current based on the voltage difference.

[0018] If the actual panel current is greater than the predicted panel current, the brightness compensation unit can use the actual panel current and the predicted panel current to obtain a gain value as the brightness compensation information.

[0019] The gain value can be the ratio of the predicted panel current to the actual panel current.

[0020] The gain value can have a plurality of levels that decrease in stages with a base of 1 over a specified time period.

[0021] The brightness compensation unit can multiply the gain value by each data signal in the data signals of all sub-pixels of the image data to obtain the compensated image data.

[0022] The panel current prediction device can use the maximum panel current to obtain the panel current line; the panel current line can be linear or non-linear.

[0023] To achieve the stated or other objectives, according to other aspects, the brightness compensation method includes: obtaining an average current APL range based on image data provided to a panel; obtaining a predicted panel current based on a maximum panel current and the obtained average current APL range; connecting to a power line on the panel and detecting the actual panel current; comparing the obtained predicted panel current with the detected actual panel current to obtain brightness compensation information; and adjusting the image data based on the obtained brightness compensation information to obtain compensated image data.

[0024] The step of obtaining brightness compensation information may include the step of using the actual panel current and the predicted panel current to obtain a gain value as the brightness compensation information if the actual panel current is greater than the predicted panel current.

[0025] The step of obtaining the compensated image data may include multiplying the gain value by each of the data signals of all sub-pixels of the image data to obtain the compensated image data.

[0026] To achieve the aforementioned or other objectives, according to another aspect, the display device includes: a panel; a panel driving device for driving the panel; and a brightness compensation device for compensating the brightness of the panel; the brightness compensation device includes: a panel current prediction device for obtaining an average current APL range based on image data provided to the panel, and obtaining a predicted panel current based on a maximum panel current and the average current APL range; a current sensor connected to a power line on the panel and detecting the actual panel current; and a brightness compensation unit for comparing the obtained predicted panel current with the detected actual panel current to obtain brightness compensation information, and adjusting the image data based on the obtained brightness compensation information to obtain compensated image data.

[0027] The effects of the brightness compensation device, method, and display device in the aforementioned aspects are explained below.

[0028] According to at least one of the aforementioned aspects, since the overall brightness of the panel decreases by approximately the gain value, it has the advantage of reducing the actual panel current and power consumption.

[0029] According to at least one of the aforementioned aspects, if the panel temperature exceeds a threshold, the actual panel current is reduced by brightness adjustment, thereby having the advantage of long-term improved lifespan.

[0030] According to at least one of the aforementioned aspects, by reducing a brightness greater than the target brightness to the target brightness when the temperature increases, it has the advantage of improving image quality by preventing data distortion. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present disclosure and may be incorporated into and comprise a part of this disclosure. Furthermore, the drawings serve to explain the features of the present disclosure and, together with the description thereof, illustrate the principles of the disclosure.

[0032] The accompanying drawings include the following figures.

[0033] Figure 1 This is a block diagram illustrating the display device of this disclosure.

[0034] Figure 2 This is a block diagram illustrating the brightness compensation device of this disclosure.

[0035] Figure 3 It shows in detail Figure 2 A brightness compensation device.

[0036] Figure 4 The average value of the current APL is shown.

[0037] Figure 5 The actual panel current is shown.

[0038] Figure 6 The brightness compensation utilizes both the predicted panel current and the actual panel current.

[0039] Figure 7 An example of applicable gain values ​​is shown.

[0040] Figure 8 Various panel current lines are shown.

[0041] The size, shape, and values ​​of the constituent elements shown in the accompanying drawings may differ from the actual figures. Furthermore, even if the same constituent element is shown with different sizes, shapes, and values ​​in different figures, this is merely an example in the drawings; the same constituent element may have the same size, shape, and values ​​in different figures. Detailed Implementation

[0042] The aspects disclosed in this specification will now be described in detail with reference to the accompanying drawings. Regardless of the reference numerals, the same or similar constituent elements are given the same reference numerals, and repeated descriptions are omitted. The suffixes "module" and "section" used for constituent elements in the following description are assigned or used interchangeably for ease of writing only and do not inherently have a distinguishing meaning or function. Furthermore, the drawings are provided only for ease of understanding of the aspects disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the drawings. Additionally, when referring to an element such as a layer, region, or substrate existing "on" other constituent elements, it may also include elements existing directly on or between other elements.

[0043] In the following text, "~module", "~part", "~device", etc., can be composed of "~circuit" or "integrated circuit". "~module", "~part", "~device", etc., can be used interchangeably with "~circuit" or "integrated circuit".

[0044] Figure 1 This is a block diagram illustrating the display device of this disclosure.

[0045] Reference Figure 1 The display device 100 disclosed herein may include a panel 110, a data processing device 140, and panel driving devices 120, 130, etc.

[0046] In this disclosure, while panel 110 may be a liquid crystal panel, an organic light-emitting panel, or a micro-LED-based panel, it is not limited to these. A plurality of data lines DL and a plurality of gate lines GL may be configured in panel 110. A plurality of pixels P may be configured at the intersections of the plurality of data lines DL and the plurality of gate lines GL. The plurality of pixels P may be arranged in a matrix.

[0047] A pixel P can be the smallest unit for displaying an image. To display such an image, a pixel P may include a plurality of subpixels for displaying a plurality of colors. For example, a pixel P may include: a red subpixel for displaying red; a green subpixel for displaying green; and a blue subpixel for displaying blue; but it is not limited thereto.

[0048] Panel driving devices 120 and 130 can drive panel 110. The panel driving devices may include gate driving device 120, data driving device 130, and data processing device 140, etc. Panel driving devices 120 and 130 may also include more components than those.

[0049] The gate driving device 120 can supply a scan signal having an on-state voltage or an off-state voltage to the gate line GL. For example, although the on-state voltage can be high and the off-state voltage can be low, it is not limited to this. For example, each sub-pixel responds to the scan signal with the on-state voltage and is connected to the data line DL, and can display an image corresponding to the data voltage, that is, the grayscale voltage. For example, each sub-pixel responds to the scan signal with the off-state voltage to disconnect the data line DL so as not to display an image.

[0050] The gate driving device 120 may include at least one gate driving circuit. The gate driving circuit may include a gate driver IC (Integrated Circuit).

[0051] The data driving device 130 can generate a data voltage and supply it to the data line DL. As previously described, when the data line DL is connected to each sub-pixel using a scan signal, the data voltage can be supplied to each sub-pixel.

[0052] The data driving device 130 can convert the compensated image data RGB′ provided by the data processing device 140 into a data voltage using the gamma voltage provided by the gamma voltage circuit. Here, the compensated image data RGB′ can be brightness-adjusted image data in order to reduce the panel current that increases with increasing temperature.

[0053] The data processing device 140 can supply various control signals GCS and DCS to the gate driving device 120 and the data driving device 130. For example, the data processing device 140 can generate a gate control signal GCS to initiate scanning according to the timing implemented in each frame and transmit it to the gate driving device 120. The data processing device 140 can take into account the actual panel current PC2 to adjust the brightness of the image data RGB applied from an external device and acquire the compensated image data RGB′. The data processing device 140 can transmit a data control signal DCS to control the data driving device 130 to supply data voltage to each sub-pixel according to the timing sequence.

[0054] The data processing device 140 can be referred to as a timing controller. Although the data processing device 140 and the panel driving devices 120 and 130 can be integrated into a single IC, it is not limited to this.

[0055] Figure 2 This is a block diagram illustrating the brightness compensation device of this disclosure. Figure 3 It shows in detail Figure 2 A brightness compensation device.

[0056] Reference Figures 1 to 3 The brightness compensation device 150 disclosed herein may include a panel current prediction device 160, a current sensor 170, and a brightness compensation unit 180, etc.

[0057] While the brightness compensation device 150 may also be included in the data processing device 140, it is not limited thereto.

[0058] The panel current prediction device 160 can predict the panel current. Specifically, it can obtain the average value of the current APL (Average Picture Level) range based on the RGB image data provided to the panel 110, and predict the maximum panel current C. ref The average value of the current APL obtained is used to predict the panel current PC1.

[0059] The image data RGB of a frame can include data signals for each of the plurality of sub-pixels, each of the plurality of pixels P on the panel 110. Here, the data signals can be composed of digital bits and have defined grayscale values. Light with a brightness corresponding to the corresponding data signal can be generated in that corresponding sub-pixel. As described above, by generating light with different brightness in each of the plurality of sub-pixels on the panel 110 frame by frame, an image can be displayed.

[0060] Current APL can be defined as the real-time power consumption corresponding to the APL in the current output of panel 110. That is, it can be an indicator of how much current is consumed in panel 110 at the current average brightness level on panel 110. Current APL can be used to quantitatively analyze or predict power consumption.

[0061] The average value of the current APL interval, CAPL, is calculated. t The method will be explained.

[0062] First, the current APL of a single pixel P can be calculated using mathematical formula 1.

[0063] [Mathematical Expression 1]

[0064] CAPL p =xR + yG + zB

[0065] Here, CAPL p It can be the current APL of a single pixel P, x, y and z can be the current ratios of RGB respectively, and R, G and B can be the red data signal, green data signal and blue data signal that constitute a single pixel P included in the image data RGB.

[0066] The current ratios for each RGB element can be preset. For example, in R=G=B=255, the current ratio of R:G:B can be set to 1:1:2. In this case, the current APL (CAPL) of a single pixel P... p () can be (0.25R + 0.25G + 0.5B).

[0067] Using mathematical formula 1, the current APL of each pixel P included in the RGB image data can be calculated.

[0068] Then, the average current APL of a frame can be calculated. By averaging the calculated current APL of all pixels P, the average current APL of a frame can be calculated. The average current APL of a frame can be expressed by mathematical formula 2.

[0069] [Mathematical Expression 2]

[0070] CAPL f= [SUM(xR + yG + zB) / total number of pixels P] × 100

[0071] Here, CAPL f It can be the average current APL of a frame, and SUM(xR+yG+zB) can be the sum of the current APL of all pixels P.

[0072] like Figure 4 As shown, the average current APL can be calculated for each plurality of frames (FR1 to FRm) included in the first interval ST1.

[0073] In this case, by averaging the average values ​​of the current APL calculated from multiple frames (FR1 to FRm) included in the first region ST1, the interval average value of the current APL, CAPL, can be calculated. t In this way, the average value of the current APL interval, CAPL, can be continuously acquired in units of multiple frames (FR1 to FRm) included in the first interval ST1. t .

[0074] On the other hand, the current sensor 170 can detect the actual current flowing through the panel 110, that is, it can detect the actual panel current PC2. The current sensor 170 may include a shunt resistor 171, a current sensing circuit 173, etc.

[0075] like Figure 1 As shown, the shunt resistor 171 can be connected to the first power line PL1, but it can also be connected to the second power line PL2. The shunt resistor 171 can be mounted on the substrate as a component or formed on the substrate through a semiconductor process.

[0076] All pixels P (or sub-pixels) on panel 110 can be connected to a first power line PL1 and a second power line PL2. A high-potential voltage VDD can be supplied to all pixels P on panel 110 through the first power line PL1, and a low-potential voltage VSS can be supplied to all pixels P through the second power line PL2. Each pixel P (or sub-pixel) can generate light with a specified brightness using the high-potential voltage VDD and the low-potential voltage VSS.

[0077] By connecting the shunt resistor 171 to the first power line PL1, a voltage difference PD can be generated across the shunt resistor 171 using its resistance. For example, if the panel 110 is driven, a high potential voltage VDD can be used to allow current to flow through the first power line PL1. The corresponding current can then generate a voltage difference PD through the shunt resistor 171.

[0078] The current sensing circuit 173 can obtain the actual panel current PC2 using the voltage difference PD and the resistance of the shunt resistor 171.

[0079] In this disclosure, the actual panel current PC2 can be for... Figure 5 The average value of the panel current obtained from multiple frames (FR1 to FRn) within the second interval ST2 is shown. Although the number of multiple frames (FR1 to FRn) within the second interval ST2 can be the same as the number of multiple frames (FR1 to FRm) included in the first interval ST1, they can also be different.

[0080] like Figure 3 As shown, the current sensing circuit 173 can acquire the panel current frame by frame. The panel current acquired frame by frame can be stored in register 193.

[0081] The current sensing circuit 173 can average the panel current acquired frame by frame. The current sensing circuit 173 can retrieve the panel current stored in register 193 in real time and average these panel currents. The panel current is averaged and... Figure 5 When the second interval ST2 is shown, the averaged value can be obtained as the actual panel current PC2 over a plurality of frames. In this way, the actual panel current PC2 can be continuously obtained in units of a plurality of frames corresponding to the second interval ST2.

[0082] On the other hand, the brightness compensation unit 180 can adjust the brightness of the image data RGB using the predicted panel current PC1 provided by the panel current prediction device 160 and the actual panel current PC2 provided by the current sensor 170. The brightness compensation unit 180 can compare the predicted panel current PC1 with the actual panel current PC2 to obtain brightness compensation information LCI, and adjust the image data RGB based on the brightness compensation information LCI to obtain compensated image data RGB′.

[0083] For example, the brightness can be adjusted so that the data signals of all sub-pixels constituting the RGB image data have the same brightness. For example, when the actual panel current PC2 is greater than the predicted panel current PC1, brightness adjustment can be performed to reduce the data signals of all sub-pixels constituting the RGB image data to be the same.

[0084] A larger actual panel current PC2 than the predicted panel current PC1 indicates that the temperature of panel 110 has become higher than a threshold. In this case, the brightness of the RGB image data can be reduced to lower the temperature of panel 110. With reduced RGB brightness, the panel current can be reduced, resulting in a decrease in the temperature of panel 110.

[0085] In this disclosure, memory 191 may be non-volatile flash memory, while register 193 may be volatile. Therefore, if the power is turned off, the data or information in register 193 may be lost. Conversely, memory 191 can retain data or information even when the power is turned on or off.

[0086] like Figure 3 As shown, the maximum panel current C ref The data can be acquired and stored in memory 191 during the product mass production process. The maximum panel current C stored in memory 191 when the power is on and the panel 110 is driven... ref It can be stored in register 193.

[0087] The panel current prediction device 160 can utilize the maximum panel current C ref Obtain the panel current line PCL. In this disclosure, as... Figure 6 Although the description is limited to linear panel current lines PCL, as mentioned above, Figure 8 As shown, it can be applied not only to the linear first panel current line PCL1, but also to the nonlinear second panel current line PCL2 or third panel current line PCL3. The panel current prediction device 160 can utilize the maximum panel current C ref , obtain Figure 8 One of the first panel current lines PCL1 to the third panel current line PCL3 shown.

[0088] By dividing the current APL into multiple intervals (SS1 to SS5) and using interpolation to estimate the panel current corresponding to any current APL value within each interval (SS1 to SS5), it is possible to obtain a nonlinear second panel current line PCL2 or a third panel current line PCL3.

[0089] In contrast, the maximum panel current C can also be used. ref Based on this, the nonlinear second panel current line PCL2 or the third panel current line PCL3 is obtained using a pre-set mathematical formula.

[0090] on the other hand, Figure 8 The first panel current line PCL1 to the third panel current line PCL3, or one of them, can be pre-acquired and stored in memory 191 during the mass production process. One of the first panel current lines PCL1 to the third panel current line PCL3 stored in memory 191 can be set to an active state. In such a case, although not in Figure 3 As shown, however, the panel current prediction device 160 can retrieve the panel current line PCL set to the activated state from the memory 191 instead of the maximum panel current C. refAnd based on the average value of the corresponding panel current line PCL and current APL interval CAPL t Obtain the predicted panel current PC1.

[0091] Figure 6 The brightness compensation utilizes both the predicted panel current and the actual panel current.

[0092] like Figure 6 As shown, the average value of the current APL range is CAPL. t It can have a normalized value between 0 and 100. In this case, it can be assumed to be related to the maximum panel current C. ref The corresponding current APL has a normalized value of 100.

[0093] As mentioned earlier, the average value of the current APL range is CAPL. t , Figure 4 As shown, it can be the average value obtained for multiple frames within the first interval.

[0094] In this case, the panel current PC1 can be predicted using mathematical formula 3.

[0095] [Mathematical Expression 3]

[0096] PC1 = [C ref / 100]CAPL t

[0097] Here, the average value of the current APL range is CAPL. t It can have a normalized value between 0 and 100. At the maximum panel current C ref When corresponding to a normalized current APL of 100, according to mathematical formula 3, the predicted panel current PC1 can be the average value of the current APL interval CAPL. t In this situation, with the maximum panel current C ref Correspondingly, when the current APL has a normalized value of 100, the predicted panel current PC1 can be the interval average value of current APL, CAPL. t .

[0098] Average value of current APL range CAPL t It is possible to Figure 6 The horizontal axis shown is a reference, located between 0 and 100. Therefore, by making the average value of the current APL range CAPL... t Matching with the panel current line PCL allows for the acquisition of the average value CAPL within the current APL range. t The corresponding predicted panel current PC1.

[0099] Re-reference Figures 1 to 3The brightness compensation unit 180 may include a brightness compensation calculation unit 181, a brightness adjustment unit 183, etc.

[0100] When the actual panel current PC2 is greater than the predicted panel current PC1, the brightness compensation calculation unit 181 can use the actual panel current PC2 and the predicted panel current PC1 to obtain a gain value as brightness compensation information.

[0101] As an example, the gain value can be calculated using mathematical formula 4.

[0102] [Mathematical Expression 4]

[0103] G = PC1 / PC2

[0104] Here, G can be the gain value, PC1 can be the predicted panel current, and PC2 can be the actual panel current.

[0105] Since the predicted panel current PC1 is the reference value used to calculate the gain value G, it can also be called the reference panel current.

[0106] According to mathematical formula 4, the gain value G can be obtained using the predicted panel current PC1 and the actual panel current PC2. That is, the gain value G can be the ratio of the predicted panel current PC1 to the actual panel current PC2.

[0107] When the actual panel current PC2 is greater than the predicted panel current PC1, a gain value G smaller than 1 can be obtained; when the actual panel current PC2 is less than the predicted panel current PC1, a gain value G larger than 1 can be obtained.

[0108] In an embodiment, a gain value G smaller than 1 obtained when the actual panel current PC2 is greater than the predicted panel current PC1 can be used to reduce the brightness of the RGB image data.

[0109] Normally, when panel 110 is driven, the actual panel current PC2 may be smaller than the predicted panel current PC1 due to the increased temperature of panel 110. However, depending on the characteristics of panel 110, the temperature of panel 110 may also decrease when it is driven. In such a case, a gain value G greater than 1 obtained when the actual panel current PC2 is smaller than the predicted panel current PC1 can still be used for brightness reduction of image data RGB.

[0110] As another example, such as Figure 7As shown, the gain value G can have a level (GL1 to GL6) that decreases in stages with a reference of 1 within a specified time T. The specified time T can have multiple sub-intervals (t1 to t6), and the levels (GL1 to GL6) in the first sub-interval t1 to the sixth sub-interval t6 can be different from each other. The level can gradually decrease from the first sub-interval t1 to the sixth sub-interval t6 (GL1 to GL6).

[0111] For example, the brightness of the image data RGB can first be adjusted with a gain value G at a first level GL1, and then the brightness of the image data RGB can be adjusted with a gain value G at a second level GL2. In this way, the brightness of the image data RGB can be adjusted with a gain value G at the final level, the sixth level GL6. As described above, by using gain values ​​G with progressively decreasing levels (GL1 to GL6) to adjust the brightness of the image data RGB, the brightness adjustment can be made more precise and rapid, allowing the overheated temperature to reach the target temperature.

[0112] On the other hand, the brightness adjustment unit 183 can multiply the gain value G by the data signals of all sub-pixels of the image data RGB to obtain the compensated image data RGB′. As a result, the data signals of all sub-pixels of the compensated image data RGB′ decrease by approximately the gain value G, and the brightness may decrease by approximately the gain value G. Since the brightness of each sub-pixel decreases by approximately the gain value G, the overall brightness of the panel 110 can also decrease by approximately the gain value G.

[0113] According to this disclosure, since the overall brightness of panel 110 decreases by about G, the actual panel current PC2 will also decrease, thus reducing power consumption.

[0114] According to this disclosure, when the temperature of panel 110 exceeds a threshold, the actual panel current PC2 is reduced by adjusting the brightness, thereby improving the lifespan over a long period.

[0115] According to this disclosure, reducing a brightness that is greater than the target brightness to the target brightness when the temperature increases can prevent data distortion and improve image quality.

[0116] The detailed description described above should not be construed as restrictive in all respects, but rather as exemplary. The scope of the foregoing should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the foregoing should fall within the scope of this invention.

Claims

1. A brightness compensation device, wherein, include: A panel current prediction device obtains the average value of the current APL range based on image data provided to the panel, and obtains the predicted panel current based on the maximum panel current and the obtained average value of the current APL range. A current sensor is connected to the power cord on the panel and detects the actual panel current. as well as The brightness compensation unit compares the acquired predicted panel current with the detected actual panel current to obtain brightness compensation information, and adjusts the image data based on the acquired brightness compensation information to obtain compensated image data.

2. The brightness compensation device according to claim 1, wherein, The average value of the current APL interval is the average value obtained for a plurality of frames within the first interval; The actual panel current is the average value of the panel current obtained for multiple frames within the second interval.

3. The brightness compensation device according to claim 1, wherein, The predicted panel current is the average value of the current APL interval when the average value of the current APL interval has a normalized value between 0 and 100 and the current APL corresponding to the maximum panel current has a normalized value of 100.

4. The brightness compensation device according to claim 1, wherein, The current sensor includes: A shunt resistor is connected to the power line and generates a voltage difference; and A current sensing circuit obtains the actual panel current based on the voltage difference.

5. The brightness compensation device according to claim 1, wherein, If the actual panel current is greater than the predicted panel current, the brightness compensation unit uses the actual panel current and the predicted panel current to obtain a gain value as the brightness compensation information.

6. The brightness compensation device according to claim 5, wherein, The gain value is the ratio of the predicted panel current to the actual panel current.

7. The brightness compensation device according to claim 5, wherein, The gain value has a plurality of levels that decrease in stages with a reference of 1 over a specified time period.

8. The brightness compensation device according to claim 5, wherein, The brightness compensation unit multiplies the gain value by each data signal in the data signals of all sub-pixels of the image data to obtain the compensated image data.

9. The brightness compensation device according to claim 1, wherein, The panel current prediction device uses the maximum panel current to obtain the panel current line; The panel current lines can be linear or non-linear.

10. A brightness compensation method, wherein, include: The step of obtaining the average value of the current APL range based on the image data provided to the panel; The step of obtaining the predicted panel current based on the maximum panel current and the average value of the current APL interval; The steps of connecting to the power cord on the panel and detecting the actual panel current; The step of comparing the obtained predicted panel current with the detected actual panel current to obtain brightness compensation information; as well as The step of adjusting the image data based on the acquired brightness compensation information to obtain compensated image data.

11. The brightness compensation method according to claim 10, wherein, The step of obtaining brightness compensation information includes the step of using the actual panel current and the predicted panel current to obtain a gain value as the brightness compensation information if the actual panel current is greater than the predicted panel current.

12. The brightness compensation method according to claim 11, wherein, The step of obtaining the compensated image data includes multiplying the gain value by each of the data signals of all sub-pixels of the image data to obtain the compensated image data.

13. A display device, wherein, include: panel; A panel driving device drives the panel; as well as A brightness compensation device to compensate for the brightness of the panel; The brightness compensation device includes: A panel current prediction device obtains the average value of the current APL range based on image data provided to the panel, and obtains the predicted panel current based on the maximum panel current and the average value of the current APL range; A current sensor is connected to the power cord on the panel and detects the actual panel current; and The brightness compensation unit compares the acquired predicted panel current with the detected actual panel current to obtain brightness compensation information, and adjusts the image data based on the acquired brightness compensation information to obtain compensated image data.

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