A compensation module and a compensation method for displaying peak brightness, and a computer readable medium

Abstract

The application provides a compensation module and a compensation method for displaying peak brightness, and a computer readable medium, and the compensation module comprises a current conversion circuit, a voltage drop calculation circuit, a position weight calculation circuit and a voltage drop compensation circuit connected in sequence. The application can significantly improve the peak brightness while compensating the voltage drop.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of integrated circuit design, in particular to the field of display compensation technology. BACKGROUND

[0002] AMOLED is a current-driven display, in the normal working state, the display screen brightness is proportional to the driving current, the driving current is determined by the driving voltage Vdata and the ELVDD voltage difference, when the full screen current changes, the power supply voltage on the display screen power supply line changes, especially the voltage of ELVDD changes IR Drop.

[0003] For AMOLED display driver chip, usually for Global IR Drop and Local IR Drop compensation, that is, detecting or calculating the IR Drop△V generated under different pictures, and then compensating the driving voltage, so as to ensure that the current corresponding to the same driving voltage is equal under different IR Drop△V, that is, the brightness is consistent.

[0004] But the compensation result is that the peak brightness of the display is consistent with the full screen display brightness, that is, the brightness and chroma of the display screen meet Grassmann's third law in CIE 1931 color space:

[0005]

[0006] Therefore, the brightness of the full screen white picture is the maximum brightness, and the full screen display brightness is limited by the power supply condition, the aperture ratio of the pixel, the luminous efficiency of the EL material, the service life and other factors, and cannot be very high, so after IR Drop compensation, the peak brightness is compensated to be consistent with the full screen brightness, that is, the peak brightness of the display screen is limited, so that the contrast of the display screen is lower.

[0007] Therefore, the present application is proposed. SUMMARY

[0008] The present application provides a display peak brightness compensation module and a compensation method and a computer readable medium, which can significantly improve the peak brightness while compensating the voltage drop.

[0009] In one aspect, the present application provides a display peak brightness compensation module, comprising:

[0010] a current conversion circuit, a voltage drop calculation circuit, a position weight calculation circuit and a voltage drop compensation circuit connected in sequence;

[0011] The current conversion circuit receives the input sub-pixel data or driving voltage, and is used to convert the input sub-pixel data into current;

[0012] The voltage drop calculation circuit is configured to calculate a global voltage drop based on the current;

[0013] The position weight calculation circuit is configured to calculate a local voltage drop based on the weight coefficient of different partitions and the global voltage drop;

[0014] The voltage drop compensation circuit is configured to receive input sub-pixel data or driving voltage, and to compensate the input sub-pixel data or driving voltage based on the input sub-pixel data or driving voltage and the local voltage drop to obtain output data.

[0015] Further, the voltage drop compensation circuit further comprises an OPR calculation unit, a MUX unit and a peak circuit compensation table selection circuit;

[0016] The OPR calculation unit is configured to receive input sub-pixel data or driving voltage, and to calculate OPR;

[0017] The MUX unit has a first input end connected to the OPR calculation unit, a second input end configured to receive DBV, and an output end connected to the peak circuit compensation table selection circuit, and is configured to provide OPR or DBV to the peak circuit compensation table selection circuit;

[0018] The peak circuit compensation table selection circuit is further connected to the voltage drop compensation circuit, and is configured to select a corresponding peak luminance compensation table or peak luminance compensation weight based on OPR or DBV.

[0019] Further, the voltage drop compensation circuit compensating the input sub-pixel data or driving voltage comprises the following steps:

[0020] S1, selecting a suitable peak luminance compensation table based on OPR or DBV;

[0021] S2, selecting a corresponding peak luminance compensation value from the peak luminance compensation table based on the local voltage drop of the current position;

[0022] S3, compensating the input sub-pixel data or driving voltage based on the peak luminance compensation value to obtain output data.

[0023] Further, the voltage drop compensation circuit compensating the input sub-pixel data or driving voltage comprises the following steps:

[0024] Step a, selecting a suitable peak luminance compensation weight based on OPR or DBV;

[0025] Step b, selecting a corresponding reference luminance compensation value from the reference luminance compensation table based on the local voltage drop of the current position, and compensating the input sub-pixel data or driving voltage based on the reference luminance compensation value to obtain first output data;

[0026] Step c, compensating the first output data based on the peak brightness compensation weight to obtain second output data and outputting.

[0027] Further, the voltage drop calculation circuit calculates the global voltage drop V drop :

[0028]

[0029] wherein M r *N r is the number of sub-pixels R, M g *N g is the number of sub-pixels G, M b *N b is the number of sub-pixels B, R r is the impedance coefficient corresponding to the sub-pixel R, R g is the impedance coefficient corresponding to the sub-pixel G, R b is the impedance coefficient corresponding to the sub-pixel B, I ij [r] is the current value corresponding to the sub-pixel R in the i-th row and j-th column, I ij [g] is the current value corresponding to the sub-pixel G in the i-th row and j-th column, I ij [b] is the current value corresponding to the sub-pixel B in the i-th row and j-th column, M r , N r , M g , N g , M b , N b are all positive integers.

[0030] On the other hand, based on the above compensation module, the application further provides a compensation method for displaying peak brightness, comprising the following steps:

[0031] Step 1, converting the input sub-pixel data or driving voltage into current;

[0032] Step 2, calculating the global voltage drop;

[0033] Step 3, calculating the local voltage drop of the current position based on the position weight;

[0034] Step 4, calculating OPR based on the input sub-pixel data or driving voltage;

[0035] Step 5, selecting the corresponding peak brightness compensation table based on OPR or DBV information;

[0036] Step 6, selecting the corresponding peak brightness compensation value from the peak brightness compensation table based on the local voltage drop of the current position;

[0037] Step 7, compensating the input sub-pixel data or driving voltage based on the peak luminance compensation value to obtain output data.

[0038] On the other hand, based on the compensation module, the application also provides a compensation method for displaying peak luminance, comprising the following steps:

[0039] Step 1, converting the input sub-pixel data or driving voltage into current;

[0040] Step 2, calculating global voltage drop;

[0041] Step 3, calculating local voltage drop of the current position based on position weight;

[0042] Step 4, calculating OPR based on the input sub-pixel data or driving voltage;

[0043] Step 5, selecting corresponding peak luminance compensation weight based on OPR or DBV information;

[0044] Step 6, calculating compensation value under reference luminance;

[0045] Step 7, selecting corresponding reference luminance compensation value from the reference luminance compensation table based on the local voltage drop of the current position; and compensating the input sub-pixel data or driving voltage based on the reference luminance compensation value to obtain first output data;

[0046] Step 8, compensating the first output data based on the peak luminance compensation weight to obtain second output data and output.

[0047] On the other hand, the application also provides a computer readable medium storing a computer program, which, when running on a computer, executes the above-mentioned compensation method.

[0048] Compared with the prior art, the application has the following beneficial effects:

[0049] (1) The application accurately compensates voltage drop, solving the problem of inconsistency between chroma and luminance after compensation in the prior art.

[0050] (2) The application can significantly improve peak luminance while compensating voltage drop.

[0051] (3) The application can improve peak luminance while maintaining consistency between luminance and chroma, i.e. realizing different peak luminances under different OPR or DBV, satisfying Grassmann's third law, without the need for recalibration or Gamma calculation. BRIEF DESCRIPTION OF DRAWINGS

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the compensation module in this embodiment;

[0054] Figure 2 This is a schematic diagram of the voltage drop calculation circuit in this embodiment;

[0055] Figure 3 This is a schematic diagram of the position weight calculation circuit structure in this embodiment;

[0056] Figure 4 This is a schematic diagram illustrating the voltage drop calculation at different locations in this embodiment;

[0057] Figure 5 This is a schematic diagram of voltage drop compensation.

[0058] Figure 6 This is a schematic diagram of another voltage drop compensation method;

[0059] Figure 7 This is a schematic diagram of the OPR computing unit structure;

[0060] Figure 8 This is a schematic diagram of the compensation method in this embodiment;

[0061] Figure 9 This is a schematic diagram of another compensation method in this embodiment;

[0062] Figure 10 (a) is a schematic diagram before compensation; Figure 10 (b) is a schematic diagram after compensation; Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] Figure 1 A schematic diagram of one structure of the compensation module in this implementation is shown. Figure 1As shown, the compensation module includes current conversion circuit 10, voltage drop calculation circuit 20, position weight calculation circuit 30 and voltage drop compensation circuit 40 connected in sequence. Meanwhile, it also includes OPR calculation unit 50, MUX unit 60 and peak circuit compensation table selection circuit 70, wherein the first input end of MUX unit 60 is connected with the OPR calculation unit, the second input end receives DBV, the output end of MUX unit 60 is connected with the peak circuit compensation table selection circuit; the peak circuit compensation table selection circuit 70 is also connected with the voltage drop compensation circuit 40.

[0065] Now the modules are described in detail

[0066] Current conversion circuit

[0067] The current conversion circuit receives input sub-pixel data or driving voltage and converts the input pixel data into current. Since there is a Gamma relationship between the input pixel data and current, or a conversion relationship in formula ① between the driving voltage data and driving current, it is necessary to convert the input sub-pixel data or voltage data into current.

[0068] When the pixel data works in the digital domain (i.e. before the Gamma conversion circuit), the relationship between the pixel data and brightness is Lv pixel = Lv max *(Code / Code max ) Gamma Therefore, according to Current out = Pixel in_max *(Pixel in / Pixel in_max Gamma The pixel data is converted into brightness, and the brightness of OLED display is proportional to current, so the converted brightness data is equivalent to normalized current data.

[0069] When the pixel data works in the voltage domain (i.e. after the Gamma conversion circuit), the relationship between the pixel data and voltage is linear, so the pixel voltage data can be converted into current according to the relationship of formula ①, and the current conversion circuit realizes the above function.

[0070] I ds = K(ELVDD-V data ) 2 ①

[0071] Wherein, I ds is the current value, K is the coefficient, ELVDD is the supply voltage, V data is the driving voltage.

[0072] ​For the input sub-pixel data, the current can be converted by the look-up table interpolation method, i.e. first searching the upper and lower interval Node binding point position in the stored look-up table through the look-up circuit, for the equally divided Node, the corresponding binding point position is obtained, for the non-equally divided Node, the comparator can be used to find the corresponding upper and lower interval binding point position; then based on the binding point position, the data Node data out of the upper and lower interval binding point is output, including the data of low and up; finally, based on the data of the upper and lower interval binding point, the gain data of the non-linear domain is obtained by using the linear interpolation method.

[0073] Preferably, the sub-pixel data is converted into current, and the conversion coefficient can be Gamma_r, Gamma_g and Gamma_b, which is realized according to the actual relationship between the sub-pixel data and the brightness of the display; the voltage data is converted into current, and the conversion relationship can be formula ① or can be obtained by fitting according to the actual test of the brightness and voltage relationship, which is not limited here.

[0074] Preferably, the implementation of the current conversion circuit is not limited to using the look-up table interpolation method, but also can use polynomial approximation calculation, such as Current out =Pixel in_max *(a0+a1*(Pixel in / Pixel in_max )+a2*(Pixel in / Pixel in_max ) 2 +a3*(Pixel in / Pixel in_max ) 3 )approximation calculation.

[0075] Voltage drop calculation circuit

[0076] The voltage drop calculation circuit calculates the global voltage drop based on the current calculated by the current conversion circuit. Since the ELVDD power supply is a global power supply, it is necessary to calculate the global voltage drop based on the global current after statistics and multiplication of the corresponding impedance.

[0077] The voltage drop calculation circuit is shown in the example Figure 2 , which respectively accumulates and sums up the sub-pixels, and then divides the total current by the corresponding number of sub-pixels to normalize, and finally multiplies the impedance coefficient to obtain the total global voltage drop, and the calculation formula is shown in formula ②,

[0078]

[0079] Wherein, M r *N r is the number of sub-pixels R, M g *Ng M is the number of sub-pixels G b N b R is the number of sub-pixels B r R is the impedance coefficient corresponding to the sub-pixel R g R is the impedance coefficient corresponding to the sub-pixel G b I is the impedance coefficient corresponding to the sub-pixel B ij [r] is the current value corresponding to the sub-pixel R in the i-th row and j-th column, I ij [g] is the current value corresponding to the sub-pixel G in the i-th row and j-th column, I ij [b] is the current value corresponding to the sub-pixel B in the i-th row and j-th column, M r , N r , M g , N g , M b , N b are all positive integers.

[0080] Preferably, for a conventional RGBG sub-pixel arrangement, the number of sub-pixels R and sub-pixels B is M*N, and the number of sub-pixels G is 2M*N, wherein M and N are both positive integers.

[0081] Preferably, in order to reduce the problem that the overall voltage drop changes greatly due to large changes in image data content when refreshing each frame of image data, so that the statistical results of the previous frame do not match the current frame data after refreshing, the above statistics and refreshing can be performed based on block level or row level to reduce the impact of statistical result delay;

[0082] Preferably, in order to reduce the large overhead caused by the operation of the division circuit, an accumulation comparison method can be used, that is, compare the accumulated pixel current with the total divisor every time a pixel current is accumulated, if the accumulated sum is greater than the divisor, the quotient is increased by 1, and the accumulated sum is reduced by the divisor, and the final quotient output is obtained in turn.

[0083] Position weight calculation circuit

[0084] The position weight calculation circuit calculates the local voltage drop based on the weight coefficient of different partitions and the global voltage drop.

[0085] In order to solve the problem that the voltage drops at different positions are different, the voltage drop corresponding to the current position is adjusted based on the weight Position Weight of different positions.

[0086] The position weight calculation circuit is as shown in Figure 3 Taking the input of 8 partitions in the vertical direction as an example, for the voltage drop of each input partition, multiply the position weight of each partition affecting the voltage drop of the partition, and then pass through the accumulator, that is, formula ③, to obtain the local voltage drop V of the current positiondrop_current

[0087]

[0088] V dropi is the voltage drop of the ith partition, Weight i is the weight coefficient of the ith partition.

[0089] More preferably, a one-dimensional resistance model can be considered, in the vertical direction, the voltage drop corresponding to the mth partition is calculated, considering the influence of the current of other regions on the region, such as Figure 4 As shown in formula (4), when the PMIC supplies power from bottom to top, and the display screen refreshes from top to bottom, the mth partition is refreshed, and formula (4) can be used for calculation.

[0090]

[0091] wherein V dropm represents the voltage drop of the mth partition, R m represents the resistance of the mth partition, R k represents the resistance of the kth partition, I knew represents the current newly generated by the kth partition when the mth partition is refreshed, I k represents the resistance of the kth partition.

[0092] Voltage drop compensation circuit

[0093] Based on the input pixel data R / G / B data and the voltage drop corresponding to the current pixel position, the corresponding voltage drop compensation value is calculated, and different from the existing compensation scheme, the embodiment refers to the DBV (Display Brightness Value) or OPR (On Pixel Ratio) to select the corresponding peak brightness reference compensation table, and the compensation of the IR Drop is carried out under the reference.

[0094] Here, the embodiment proposes two different compensation methods: peak brightness compensation table compensation method and peak brightness compensation weight compensation method

[0095] Peak brightness compensation table compensation method

[0096] The peak brightness reference compensation table is based on different target peak brightness, and satisfies Grassmann's third law, and different Vdata under different voltage drop reference is calculated, in order to achieve the voltage compensation value corresponding to the peak brightness, rather than the fixed voltage drop AV compensation value, as shown in formula (5) and (6), based on the relationship between the target peak brightness and the driving voltage, the voltage drop, the corresponding compensation voltage is calculated:

[0097]

[0098] wherein, Lv represents the luminance of the sub-pixel, η OLED is the current-luminance conversion coefficient of the OLED, K is a constant coefficient, ELVDD is the supply voltage, △V represents the voltage drop, V Data represents the driving voltage, λ is the channel length modulation coefficient, V S D is the source-drain voltage after considering the channel length modulation effect.

[0099]

[0100] wherein, L r (p), L g (p), L b (p) are the luminances of the sub-pixels R / G / B at position p, respectively, K′ r , K′ g , K′ b are constant coefficients, V s is the source voltage, i total is the total current, R vdd is the equivalent resistance of ELVDD, λ is the channel length modulation coefficient, V datar , V datag , V datab are the driving voltages of the sub-pixels R / G / B, respectively, V s dr is the source-drain voltage of the sub-pixel R after considering the channel length modulation effect, V s dg is the source-drain voltage of the sub-pixel G after considering the channel length modulation effect, V s db is the source-drain voltage of the sub-pixel B after considering the channel length modulation effect.

[0101] Preferably, the voltage drop compensation circuit is implemented as shown in FIG. 3, based on the input of DBV or OPR, the corresponding peak luminance reference compensation table is selected, and the compensation table in the figure is a 2D compensation table, which is calculated based on the above formula, thereby simplifying the formula and facilitating logic implementation. Figure 5 Based on the peak luminance reference 2D compensation table and the input pixel data and the voltage drop corresponding to the current pixel position, 2D LUT bilinear interpolation or triangular interpolation is performed to obtain the final output pixel value.

[0102] Based on the peak luminance compensation weight compensation method

[0103] Preferably, the voltage drop compensation circuit is implemented as shown in FIG. 3, based on the input of DBV or OPR, the corresponding peak luminance reference compensation table is selected, and the compensation table in the figure is a 2D compensation table, which is calculated based on the above formula, thereby simplifying the formula and facilitating logic implementation.

[0104] Figure 6 ​​​​​As shown, based on the DBV or OPR input, the corresponding peak brightness weights r_ratio / g_ratio / b_ratio can be selected and applied to the output pixels corresponding to the base brightness after compensation. The calculation of the compensation weights can be referred to formula ⑦:

[0105]

[0106] Where R_ratio, G_ratio, and B_ratio are the weight coefficients corresponding to sub-pixels R, G, and B, respectively; a r a g a b These are the adjustment coefficients corresponding to sub-pixels R, G, and B, respectively; Lv r Lv g Lv b These represent the brightness corresponding to sub-pixels R, G, and B, respectively; Gamma r Gamma g Gamma b Gamma correction parameters for sub-pixels R, G, and B respectively; b is the general adjustment coefficient; Lv base This is the reference brightness.

[0107] OPR calculation circuit

[0108] The OPR calculation circuit is used to calculate the On Pixel Ratio in a full-screen display, which is the proportion of pixels that are lit up. The fewer pixels that are lit up, the smaller the overall current and the smaller the voltage drop. Therefore, the larger the range of adjustment under the pixel driving voltage, the higher the peak brightness that can be achieved.

[0109] OPR calculation circuit and method, as follows Figure 7 As shown, the OPR (On Pixel Ratio) is obtained by dividing the square of the average of the input pixel values ​​by the average of the sum of the squares of the input pixels. When the value is 1, all pixels on the screen are lit; when the value is 0, all pixels on the screen are not lit. Of course, the calculation method of OPR includes, but is not limited to, directly counting the ratio of the number of lit pixels to the number of pixels displayed on the screen.

[0110] Ideally, based on the OPR value, a peak brightness reference compensation table or compensation weight for different levels can be pre-set for reference in the voltage drop compensation circuit.

[0111] Ideally, the value of DBV can be used as input to characterize the peak brightness that the display screen needs to achieve, and used as a reference in the voltage drop compensation circuit.

[0112] Preferably, the compensation module can be integrated in the sink device or the source device, and no limitation is made.

[0113] In another aspect, based on the compensation module, the embodiment further provides a compensation method for displaying peak brightness, as shown in Figure 8 The method comprises the following steps:

[0114] Step 1: converting the input sub-pixel data or driving voltage into current;

[0115] Step 2: calculating the global voltage drop;

[0116] Step 3: calculating the local voltage drop of the current position based on the position weight;

[0117] Step 4: calculating the OPR based on the input sub-pixel data or driving voltage;

[0118] Step 5: selecting the corresponding peak brightness compensation table based on the OPR or DBV information;

[0119] Step 6: selecting the corresponding peak brightness compensation value from the peak brightness compensation table based on the local voltage drop of the current position;

[0120] Step 7: compensating the input sub-pixel data or driving voltage based on the peak brightness compensation value to obtain the output data.

[0121] Preferably, the embodiment further provides another compensation method for displaying peak brightness, as shown in Figure 9 The method comprises the following steps:

[0122] Step 1: converting the input sub-pixel data or driving voltage into current;

[0123] Step 2: calculating the global voltage drop;

[0124] Step 3: calculating the local voltage drop of the current position based on the position weight;

[0125] Step 4: calculating the OPR based on the input sub-pixel data or driving voltage;

[0126] Step 5: selecting the corresponding peak brightness compensation weight based on the OPR or DBV information;

[0127] Step 6: calculating the compensation value under the reference brightness;

[0128] Step 7: selecting the corresponding reference brightness compensation value from the reference brightness compensation table based on the local voltage drop of the current position; and compensating the input sub-pixel data or driving voltage based on the reference brightness compensation value to obtain the first output data;

[0129] Step 8, compensating the first output data based on the peak brightness compensation weight to obtain second output data and outputting.

[0130] Figure 10 The contrast before and after compensation is shown, and the test shows that the brightness of the same area is increased from 562.34 nits to 952.22 nits after compensation, the peak brightness is significantly improved, and the change of chroma is less than 1JNCD.

[0131] In another aspect, the embodiment also provides a computer readable medium storing a computer program, which performs the compensation method of the embodiment when running on a computer.

[0132] The "equal" or "same" or "equal to" disclosed in the present application must consider the parameter distribution of the engineering, and the error distribution is within ± 30%; The definition of "parallel" of two line segments or two straight lines is that the included angle of the two line segments or the two straight lines is less than or equal to 45 degrees; The definition of "perpendicular" of two line segments or two straight lines is that the included angle of the two line segments or the two straight lines is within 【60, 120】 degrees; The definition of "out of phase" also needs to consider the parameter distribution of the engineering, and the error distribution of the out of phase degree is within ± 30%. In addition, in this text, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a…" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0133] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between various embodiments can be referred to each other.

[0134] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A compensation module for displaying peak brightness, characterized in that, include: The current conversion circuit, voltage drop calculation circuit, position weight calculation circuit, and voltage drop compensation circuit are connected in sequence. The current conversion circuit receives input sub-pixel data or driving voltage and converts the input sub-pixel data or driving voltage into current. The voltage drop calculation circuit is used to calculate the global voltage drop based on the current; The location weight calculation circuit is used to calculate the local voltage drop based on the weight coefficients of different partitions and the global voltage drop; The voltage drop compensation circuit receives input sub-pixel data or driving voltage, and uses it to compensate the input sub-pixel data or driving voltage based on the input sub-pixel data or driving voltage and the local voltage drop to obtain output data. It also includes a pixel brightness calculation unit, a MUX unit, and a peak circuit compensation table selection circuit; The pixel brightness calculation unit receives input sub-pixel data or driving voltage and is used to calculate the pixel brightness. The MUX unit has a first input terminal connected to the pixel brightness rate calculation unit, a second input terminal receiving the display brightness value, and an output terminal connected to the peak circuit compensation table selection circuit, used to provide the pixel brightness rate or display brightness value to the peak circuit compensation table selection circuit. The peak circuit compensation table selection circuit is also connected to the voltage drop compensation circuit, and is used to select the corresponding peak brightness compensation table or peak brightness compensation weight based on the pixel brightness rate or display brightness value.

2. The compensation module as described in claim 1, characterized in that, The voltage drop compensation circuit compensates for the input sub-pixel data or driving voltage by including the following steps: S1. Select an appropriate peak brightness compensation table based on pixel brightness rate or display brightness value; S2. Select the corresponding peak brightness compensation value from the peak brightness compensation table based on the local voltage drop at the current location; S3. Compensate the input sub-pixel data or driving voltage based on the peak brightness compensation value to obtain the output data.

3. The compensation module as described in claim 1, characterized in that, The voltage drop compensation circuit compensates for the input sub-pixel data or driving voltage by including the following steps: Step a: Select an appropriate peak brightness compensation weight based on pixel brightness rate or display brightness value; Step b: Select the corresponding reference brightness compensation value from the reference brightness compensation table based on the local voltage drop at the current position; and compensate the input sub-pixel data or driving voltage based on the reference brightness compensation value to obtain the first output data; Step c: Based on the peak brightness compensation weight, compensate the first output data to obtain the second output data and output it.

4. The compensation module as described in claim 1, characterized in that: The voltage drop calculation circuit calculates the global voltage drop V using formula (1). drop : Among them, M r *N r M is the number of sub-pixels R. g *N g M is the number of sub-pixels G. b *N b R is the number of sub-pixels B. r R is the impedance coefficient corresponding to sub-pixel R. g R is the impedance coefficient corresponding to sub-pixel G. b I is the impedance coefficient corresponding to sub-pixel B. ij [r] represents the current value corresponding to the sub-pixel R in the i-th row and j-th column, I ij [g] represents the current value corresponding to the sub-pixel G in the i-th row and j-th column, I ij [b] represents the current value corresponding to sub-pixel B in the i-th row and j-th column, M r N r M g N g M b N b All are positive integers.

5. A method for compensating peak display brightness based on the compensation module according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Convert the input sub-pixel data or driving voltage into current; Step 2, calculate the global voltage drop; Step 3: Calculate the local voltage drop at the current location based on the location weight; Step 4: Calculate the pixel brightness rate based on the input sub-pixel data or driving voltage; Step 5: Select the corresponding peak brightness compensation table based on the pixel brightness rate or display brightness value information; Step 6: Select the corresponding peak brightness compensation value from the peak brightness compensation table based on the local voltage drop at the current location; Step 7: Compensate the input sub-pixel data or driving voltage based on the peak brightness compensation value to obtain the output data.

6. A method for compensating peak display brightness based on the compensation module according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Convert the input sub-pixel data or driving voltage into current; Step 2, calculate the global voltage drop; Step 3: Calculate the local voltage drop at the current location based on the location weight; Step 4: Calculate the pixel brightness rate based on the input sub-pixel data or driving voltage; Step 5: Select the corresponding peak brightness compensation weight based on pixel brightness rate or display brightness value information; Step 6: Calculate the compensation value under the reference brightness; Step 7: Select the corresponding reference brightness compensation value from the reference brightness compensation table based on the local voltage drop at the current location; The input sub-pixel data or driving voltage is compensated based on the reference brightness compensation value to obtain the first output data; Step 8: Based on the peak brightness compensation weight, compensate the first output data to obtain the second output data and output it.

7. A computer-readable medium, characterized in that, The computer program is stored thereon, which, when run on a computer, executes the compensation method according to any one of claims 5-6.

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