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

Abstract

The invention provides a compensation module and a compensation method for displaying peak brightness, and a computer readable medium. The compensation module comprises a current conversion circuit, a voltage drop calculation circuit, a position weight calculation circuit and a voltage drop compensation circuit which are connected in sequence. According to the invention, the peak brightness can be significantly improved while the voltage drop is compensated.

Description

Technical Field

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

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

[0003] For AMOLED display driver chips, compensation is usually performed for Global IR Drop and Local IR Drop. That is, after detecting or calculating the IR Drop△V generated under different screens, compensation is performed on the driving voltage. This ensures that under different IR Drop△V, the current corresponding to the same driving voltage is equal, that is, the brightness is consistent.

[0004] However, the compensation result is that the peak brightness of the display is consistent with the display brightness of the full screen, that is, the brightness and chromaticity displayed by the display screen meet Grassmann's third law in the 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 factors such as power supply conditions, pixel aperture ratio, luminous efficiency of EL materials, and lifespan and cannot be very high. Therefore, after IR Drop compensation, the peak brightness will be compensated to the same brightness as the full screen, which limits the peak brightness of the display and makes the contrast of the display lower.

[0007] In view of this, this application is filed. Summary of the invention

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

[0009] On the one hand, this embodiment provides a compensation module for displaying peak brightness, including:

[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 input sub-pixel data or a driving voltage and is used to convert the input sub-pixel data into a current;

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

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

[0014] The voltage drop compensation circuit receives input sub-pixel data or driving voltage, and is used 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, it also includes an OPR calculation unit, a MUX unit and a peak circuit compensation table selection circuit;

[0016] An OPR calculation unit receives input sub-pixel data or a driving voltage for calculating the OPR;

[0017] A MUX unit, having a first input terminal connected to the OPR calculation unit, a second input terminal receiving DBV, and an output terminal connected to the peak circuit compensation table selection circuit, for providing OPR or DBV to the peak circuit compensation table selection circuit;

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

[0019] Furthermore, the voltage drop compensation circuit compensates the input sub-pixel data or the driving voltage, including the following steps:

[0020] S1. Select an appropriate peak brightness compensation table based on OPR or DBV;

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

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

[0023] Furthermore, the voltage drop compensation circuit compensates the input sub-pixel data or the driving voltage, including the following steps:

[0024] Step a, selecting an appropriate peak brightness compensation weight based on OPR or DBV;

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

[0026] Step c: based on the peak brightness compensation weight, the first output data is compensated to obtain the second output data and output it.

[0027] Furthermore, the voltage drop calculation circuit calculates the global voltage drop V by formula (1): drop :

[0028]

[0029] Among them, 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 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 All are positive integers.

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

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

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

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

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

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

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

[0037] Step 7: Compensate the input sub-pixel data or driving voltage based on the peak brightness compensation value to obtain output data.

[0038] On the other hand, based on the above compensation module, the present application also provides a compensation method for display peak brightness, comprising the following steps:

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

[0040] Step 2, calculate the global voltage drop;

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

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

[0043] Step 5: Select the corresponding peak brightness compensation weight based on the OPR or DBV information;

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

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

[0046] Step 8: Compensate the first output data based on the peak brightness compensation weight to obtain and output second output data.

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

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

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

[0050] (2) This application can significantly improve peak brightness while compensating for voltage drop.

[0051] (3) The present application can improve the peak brightness while maintaining the consistency of brightness and chromaticity, that is, different peak brightness can be achieved under different OPR or DBV, satisfying Grassmann's third law, and there is no need to recalibrate or calculate Gamma. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

[0055] Figure 3 This is a schematic diagram of the circuit structure for calculating position weights in this embodiment;

[0056] Figure 4 This is a schematic diagram of calculating voltage drops at different positions in this embodiment;

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

[0058] Figure 6 Another schematic diagram of voltage drop compensation is shown;

[0059] Figure 7 It is a schematic diagram of the OPR calculation unit structure;

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

[0061] Fig. 9 This is a schematic diagram of another compensation method flow chart of this embodiment;

[0062] Fig.10 (a) is a schematic diagram before compensation; Fig.10 (b) is the schematic diagram after compensation; DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Figure 1 FIG. 2 shows a schematic diagram of a structure of the compensation module of this embodiment. Figure 1As shown, the compensation module includes a current conversion circuit 10, a voltage drop calculation circuit 20, a position weight calculation circuit 30 and a voltage drop compensation circuit 40 connected in sequence. At the same time, it also includes an OPR calculation unit 50, a MUX unit 60 and a peak circuit compensation table selection circuit 70, wherein the first input end of the MUX unit 60 is connected to the OPR calculation unit, the second input end receives DBV, and the output end of the MUX unit 60 is connected to the peak circuit compensation table selection circuit; the peak circuit compensation table selection circuit 70 is also connected to the voltage drop compensation circuit 40.

[0065] Now we will explain each module 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 the current, or there is a conversion relationship between the driving voltage data and the driving current as shown in formula ①, 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 the brightness is Lv pixel =Lv max *(Code / Code max ) Gamma , so according to Current out =Pixel in_max *(Pixel in / Pixel in_max ) Gamma The pixel data is converted into brightness. Considering that the brightness of the OLED display is proportional to the current, the converted brightness data is equivalent to normalized current data.

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

[0070] I ds =K(ELVDD-V data ) 2 ①

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

[0072] Preferably, the input sub-pixel data can be converted into current through table lookup interpolation, that is, first pass through the lookup circuit to find the upper and lower interval Node binding point position in the stored lookup table, for the evenly divided Node, get the corresponding binding point position, for the unequally divided Node, can use a comparator to find the corresponding upper and lower interval binding point position; then based on the binding point position, output the upper and lower interval binding point data Node data out, including low and up data; finally, based on the upper and lower interval binding point data, use linear interpolation to obtain the gain data in the nonlinear domain.

[0073] Preferably, the sub-pixel data is converted into current, and the conversion coefficients can be Gamma_r, Gamma_g and Gamma_b, which are implemented according to the relationship between the actual 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 it can be obtained by fitting according to the actual tested brightness and voltage relationship, which is not specifically limited here.

[0074] Preferably, the current conversion circuit is implemented not only by using a table lookup interpolation method, but also by using polynomial approximate 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 ) is approximately calculated.

[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 power supply of ELVDD is global power supply, it is necessary to calculate the global current based on statistics and multiply it by the corresponding impedance to obtain the global voltage drop.

[0077] An example of a voltage drop calculation circuit is Figure 2 As shown, the sub-pixels are accumulated and summed to obtain the total current, which is then normalized by dividing it by the corresponding number of sub-pixels and finally multiplied by the impedance coefficient to obtain the total global voltage drop. The calculation formula is shown in ②.

[0078]

[0079] Among them, M r *N r is the number of sub-pixels R, M g *Ng 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 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 All are 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 statistical result of the previous frame does not match the refreshed current frame data due to the large change in the overall voltage drop caused by the large change in the image data content when each frame of image data is refreshed, the above statistics and refresh can be performed based on the block level or row level to reduce the impact of the statistical result delay;

[0082] Preferably, in order to reduce the large overhead caused by the division circuit operation, the cumulative comparison method can be used to implement it, that is, each pixel current is accumulated and compared with the total dividend. If the accumulated sum is greater than the dividend, the quotient is increased by 1, and the accumulated sum is subtracted from the dividend, and the final quotient output is obtained in sequence.

[0083] Position weight calculation circuit

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

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

[0086] Position weight calculation circuit Figure 3 As shown, taking the input of 8 partitions in the vertical direction as an example, for the voltage drop of each partition of the input, multiply it by the position weight of each partition's influence on the voltage drop of the partition, and then pass the accumulator, that is, formula ③, to obtain the local voltage drop V at the current position.drop_current

[0087]

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

[0089] A better approach is to consider a one-dimensional resistance model and calculate the voltage drop corresponding to the mth partition in the vertical direction, taking into account the impact of currents in other regions on this region, such as Figure 4 As shown, when the PMIC supplies power from bottom to top and the display screen refreshes from top to bottom, the refresh to the mth partition can be calculated using formula ④.

[0090]

[0091] Among them, V dropm represents the voltage drop in the mth partition, R m represents the resistance of the mth partition, R k represents the resistance of the kth partition, I knew It indicates the new current generated by the kth partition when refreshing to the mth partition, 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. Different from the existing compensation scheme, this embodiment refers to DBV (Display Brightness Value) or OPR (On Pixel Ratio) to select the corresponding peak brightness reference compensation table, and performs IR Drop compensation under this reference.

[0094] Here, this embodiment proposes two different compensation methods: a compensation method based on a peak brightness compensation table and a compensation method based on a peak brightness compensation weight.

[0095] Compensation method based on peak brightness compensation table

[0096] The peak brightness reference compensation table is based on different target peak brightness, on the basis of satisfying Grassmann's third law, to calculate the voltage compensation value corresponding to the peak brightness under different Vdata and different voltage drop △V reference benchmarks, rather than a fixed voltage drop △V compensation value, as shown in formulas ⑤ and ⑥. Based on the relationship between the target peak brightness and the driving voltage and voltage drop, the corresponding compensation voltage is calculated:

[0097]

[0098] Where Lv represents the brightness of the sub-pixel, η OLED is the current and brightness conversion coefficient of OLED, K is the 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] Among them, L r (p), L g (p), L b (p) are the brightness of the sub-pixel R / G / B at position p, K′ r , K′ g , K′ b All 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 sub-pixels R / G / B, V s ' dr is the source-drain voltage corresponding to the sub-pixel R after considering the channel length modulation effect, V s ' dg is the source-drain voltage corresponding to the sub-pixel G after considering the channel length modulation effect, V s ' db is the source-drain voltage corresponding to sub-pixel B after considering the channel length modulation effect.

[0101] Preferably, the voltage drop compensation circuit is implemented as follows Figure 5 As shown, based on the input of DBV or OPR, the corresponding peak brightness reference compensation table is selected. 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 logical implementation.

[0102] Based on the peak brightness reference 2D compensation table, the input pixel data and the voltage drop corresponding to the current pixel position, bilinear interpolation or triangular interpolation of the 2D LUT is performed to obtain the final output pixel value.

[0103] Weight compensation method based on peak brightness compensation

[0104] Preferably, the voltage drop compensation circuit is implemented as follows Figure 6As shown, based on the input of DBV or OPR, the corresponding peak brightness weight r_ratio / g_ratio / b_ratio can be selected and applied to the corresponding output pixel after the compensation of the reference brightness. The compensation weight calculation can refer to formula ⑦:

[0105]

[0106] Among them, R_ratio, G_ratio, B_ratio are weight coefficients corresponding to sub-pixel R, sub-pixel G and sub-pixel B respectively; a r 、a g 、a b are the adjustment coefficients corresponding to sub-pixel R, sub-pixel G and sub-pixel B respectively; Lv r ,Lv g ,Lv b Gamma is the brightness of sub-pixel R, sub-pixel G, and sub-pixel B respectively; r , Gamma g , Gamma b Gamma correction parameters corresponding to sub-pixel R, sub-pixel G and sub-pixel B respectively; b is the general adjustment coefficient; Lv base is the base brightness.

[0107] OPR calculation circuit

[0108] The OPR calculation circuit is used to calculate the pixel on-pixel ratio (On ​​Pixel Ratio) in full-screen display, that is, the ratio of lit pixels. The fewer the pixels that are lit, the smaller the overall current and the smaller the voltage drop. Therefore, the larger the adjustable spatial range under the pixel drive voltage, the higher the peak brightness that can be achieved.

[0109] OPR calculation circuit and method Figure 7 As shown, the square of the input pixel mean is divided by the mean of the sum of the input pixel squares to obtain the corresponding OPR (On Pixel Ratio). 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 full screen.

[0110] Preferably, based on the OPR value, a peak brightness reference compensation table or compensation weights for different levels are set in advance and used as a reference in the voltage drop compensation circuit.

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

[0112] Preferably, the compensation module of this embodiment can be integrated in a sink device or a source device, and there is no limitation on this.

[0113] On the other hand, based on the above compensation module, this embodiment also provides a compensation method for display peak brightness, such as Figure 8 As shown, the following steps are included:

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

[0115] Step 2, calculate the global voltage drop;

[0116] Step 3, calculating the local voltage drop at 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, based on the OPR or DBV information, select the corresponding peak brightness compensation table;

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

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

[0121] Preferably, this embodiment also provides another compensation method for display peak brightness, such as Fig. 9 As shown, the following steps are included:

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

[0123] Step 2, calculate the global voltage drop;

[0124] Step 3, calculating the local voltage drop at 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: Select 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 a corresponding reference brightness compensation value from a reference brightness compensation table based on the local voltage drop at the current position; and compensating the input sub-pixel data or the driving voltage based on the reference brightness compensation value to obtain first output data;

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

[0130] Fig.10 The comparison chart before and after compensation is shown. After testing, 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 in chromaticity is less than 1JNCD.

[0131] On the other hand, the present embodiment further provides a computer-readable medium storing a computer program, wherein the computer program executes the compensation method of the present embodiment when executed on a computer.

[0132] The "equal" or "same" or "equal" disclosed in the present invention must take into account the distribution of engineering parameters, and the error distribution is within ±30%; the definition of "parallel" of two line segments or two straight lines is that the angle between the two line segments or 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 angle between the two line segments or two straight lines is within the range of [60, 120] degrees; the definition of "phase mismatch" also needs to take into account the distribution of engineering parameters, and the error distribution of the degree of mismatch is within ±30%. In addition, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without more constraints, an element defined by the phrase "comprising a ..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

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

[0134] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather 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: A current conversion circuit, a voltage drop calculation circuit, a position weight calculation circuit and a voltage drop compensation circuit connected in sequence; The current conversion circuit receives input sub-pixel data or a driving voltage and is used to convert the input sub-pixel data into a current; The voltage drop calculation circuit is used to calculate the global voltage drop based on the current; The position 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 is used 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.

2. The compensation module according to claim 1, characterized in that: It also includes an OPR calculation unit, a MUX unit, and a peak circuit compensation table selection circuit; An OPR calculation unit receives input sub-pixel data or a driving voltage for calculating the OPR; A MUX unit, having a first input terminal connected to the OPR calculation unit, a second input terminal receiving DBV, and an output terminal connected to the peak circuit compensation table selection circuit, for providing OPR or DBV 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 a corresponding peak brightness compensation table or peak brightness compensation weight based on OPR or DBV.

3. The compensation module according to claim 2, characterized in that: The voltage drop compensation circuit compensates the input sub-pixel data or the driving voltage, comprising the following steps: S1. Select an appropriate peak brightness compensation table based on OPR or DBV; S2, selecting a corresponding peak brightness compensation value from a peak brightness compensation table based on a local voltage drop at a current position; S3. Compensate the input sub-pixel data or driving voltage based on the peak brightness compensation value to obtain output data.

4. The compensation module according to claim 2, characterized in that: The voltage drop compensation circuit compensates the input sub-pixel data or the driving voltage, comprising the following steps: Step a, selecting an appropriate peak brightness compensation weight based on OPR or DBV; Step b, selecting a corresponding reference brightness compensation value from a reference brightness compensation table based on the local voltage drop at the current position; and compensating the input sub-pixel data or the driving voltage based on the reference brightness compensation value to obtain first output data; Step c: based on the peak brightness compensation weight, the first output data is compensated to obtain the second output data and output it.

5. The compensation module according to claim 1, characterized in that: The voltage drop calculation circuit calculates the global voltage drop V by formula (1): drop : Among them, 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 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 All are positive integers.

6. A method for compensating display peak brightness based on the compensation module according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1, converting input sub-pixel data or driving voltage into current; Step 2, calculate the global voltage drop; Step 3, calculating the local voltage drop at the current position based on the position weight; Step 4, calculating the OPR based on the input sub-pixel data or driving voltage; Step 5, based on the OPR or DBV information, select the corresponding peak brightness compensation table; Step 6, selecting a corresponding peak brightness compensation value from a peak brightness compensation table based on the local voltage drop at the current position; Step 7: Compensate the input sub-pixel data or driving voltage based on the peak brightness compensation value to obtain output data.

7. A method for compensating display peak brightness based on the compensation module according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1, converting input sub-pixel data or driving voltage into current; Step 2, calculate the global voltage drop; Step 3, calculating the local voltage drop at the current position based on the position weight; Step 4, calculating the OPR based on the input sub-pixel data or driving voltage; Step 5: Select the corresponding peak brightness compensation weight based on the OPR or DBV information; Step 6, calculating the compensation value under the reference brightness; Step 7, selecting a corresponding reference brightness compensation value from a reference brightness compensation table based on the local voltage drop at the current position; and compensating the input sub-pixel data or the driving voltage based on the reference brightness compensation value to obtain first output data; Step 8: Compensate the first output data based on the peak brightness compensation weight to obtain and output second output data.

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

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