A display driving device RC load compensation method and system

Abstract

The present invention discloses a method and system for RC load compensation of a display driving device. The method includes: obtaining the RC load data value carried by each row of gate lines; obtaining the RC load difference between each row of gate lines and the maximum row RC load data value according to the RC load data value; obtaining the compensation coefficient corresponding to each row of gate lines; obtaining the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient; The system includes a detection unit, a calculation unit, and a compensation unit; the detection unit is used to detect and obtain the RC load data value carried by each row of gate lines; the calculation unit is used to calculate the RC load difference between each row of gate lines and the maximum row RC load data value according to the RC load data value and calculate the compensation coefficient of the corresponding row of gate lines; the compensation unit is used to obtain the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient and perform load compensation on this row; Implementing the present invention solves the problem that the existing special-shaped display screens are not accurate enough when calculating compensation values.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen electrical measurement, and particularly to a method and system for compensating RC load of a display driving device. Background Art

[0002] With the continuous development of the mobile phone industry, the screen of a full-screen mobile phone has the advantages of a large screen-to-body ratio and narrow borders, greatly improving the visual effect of viewers and attracting wide attention. During the production process of a full-screen, the screen is usually divided into a special-shaped display area and a normal display area. The special-shaped display area is usually provided with special-shaped structures such as slots. Therefore, the number of pixels connected to each signal line in the special-shaped display area is less than the number of pixels connected to each signal line in the normal display area. Therefore, the load of each signal line in the special-shaped display area is less than the load of each signal line in the normal display area. This causes display anomalies such as different delays in drive signals such as pixel scanning in the special-shaped display area and the normal display area.

[0003] Common special shapes, such as the norch shape, the inverted rounded corner shape of a mobile phone display screen, the circular display screen shape of a vehicle, etc., that is, users pursue the diversity of the appearance of display devices, causing upstream manufacturers to consider various display screen shapes, rather than the regular rectangular shape.

[0004] For a display screen with a non-rectangular display area, due to the difference in RC load between the display area and the normal area, there will be a difference in display effects between the special-shaped area and the normal area. In order to reduce and eliminate such display effect differences, RC load compensation for driving is required.

[0005] Chinese Patent Application CN 108766236 A discloses a display panel and a display device. By using a compensation unit to perform load compensation on the data line or the scan line of the display panel, the load of each data line or scan line on the display panel is the same, the data writing ability of the data driving circuit or the switching ability of the scan driving circuit is the same, and further the brightness of each area of the display panel is the same, hoping to eliminate defects such as uneven display brightness in this way. However, this application does not consider the attenuation of the gate driving circuit, as well as the process ability and production line fluctuation conditions, and the compensation value is not accurate enough when calculating, and the effect will also be discounted. Summary of the Invention

[0006] For existing special-shaped display screens, when calculating the compensation value, factors such as the attenuation of the gate driving circuit, the process ability, and the production line fluctuation conditions are not considered, resulting in a discounted compensation effect.

[0007] In view of the above problems, a method and system for RC load compensation of a display driving device are proposed. By obtaining the RC load data values carried by each row of gate lines, calculating the RC load difference between each row of gate lines and the maximum row RC load data value, and calculating the RC load compensation value for each row with reference to the attenuation coefficient and process fluctuation coefficient during the transmission of the gate lines, the problem that the existing special-shaped display screens are not accurate enough when calculating the compensation value is solved.

[0008] In a first aspect, a method for RC load compensation of a display driving device includes:

[0009] Step 100: Obtain the RC load data values carried by each row of gate lines;

[0010] Step 200: Obtain the RC load difference between each row of gate lines and the maximum row RC load data value according to the RC load data values;

[0011] Step 300: Obtain the compensation coefficient corresponding to each row of gate lines;

[0012] Step 400: Obtain the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient;

[0013] Wherein, the compensation coefficient includes a gate line attenuation coefficient and a process fluctuation coefficient.

[0014] In a first possible implementation manner in combination with the method for RC load compensation of the display driving device of the present invention, the step 300 includes:

[0015] Step 310: Calculate a first ratio coefficient by using the ratio of the RC load data value of each row to the maximum row RC load data value;

[0016] Step 320: Calculate a second ratio coefficient by using the first ratio coefficient and the number of compensation regions.

[0017] In a second possible implementation manner in combination with the first possible implementation manner of the present invention, in the step 320, it includes:

[0018] Step 321: Determine the number of compensation regions by using the first ratio coefficient;

[0019] Step 322: Calculate the ratio difference between the maximum row RC load data ratio and the minimum row RC load data ratio;

[0020] Step 323: Use the ratio between the ratio difference and the number of compensation regions as the second ratio coefficient.

[0021] In a third possible implementation manner in combination with the second possible implementation manner of the present invention, in the step 321, it includes:

[0022] Step 3211: If the first ratio coefficient is less than the first ratio threshold, the number of compensation regions takes values within a first range;

[0023] Step 3212: If the first ratio coefficient is between the first ratio threshold and the second ratio threshold, the number of compensation regions is within a second range;

[0024] Step 3213: If the first ratio coefficient is greater than the second ratio threshold, the number of compensation regions is a constant value N;

[0025] Wherein, the first ratio threshold is less than the second ratio threshold;

[0026] The constant value, the second range, and the first range are continuous and gradually increasing data ranges.

[0027] Combined with the third possible implementation manner of the present invention, in the fourth possible implementation manner, Step 3212 includes:

[0028] Step 32121: Divide the data range between the first ratio threshold and the second ratio threshold into multiple consecutive and gradually increasing ratio ranges;

[0029] Step 32122: Corresponding to the multiple consecutive and gradually increasing ratio ranges, the second range is a series of continuously decreasing integer values;

[0030] Step 32123: Make the smallest integer value in the second range corresponding to the largest ratio range greater than the constant value N.

[0031] Combined with the fourth possible implementation manner of the present invention, in the fifth possible implementation manner, the compensation method further includes:

[0032] Step 500: Calculate the driving circuit load of each gate line;

[0033] Step 600: Calculate the attenuation coefficient of load compensation according to the driving circuit load.

[0034] Combined with the fifth possible implementation manner of the present invention, in the sixth possible implementation manner, the compensation method includes:

[0035] Step 700: Use the product value between the second ratio coefficient and the previous region constant as the corrected ratio coefficient;

[0036] Step 800: Sum the first ratio coefficient, the corrected ratio coefficient, the gate driving line attenuation coefficient, and the process fluctuation coefficient to obtain the compensation coefficient.

[0037] Second aspect: A display driving device RC load compensation system, adopting the compensation method described in the first aspect, includes:

[0038] A detection unit;

[0039] A calculation unit;

[0040] A compensation unit;

[0041] The detection unit is used to detect and obtain the RC load data value carried by each row of gate lines;

[0042] The calculation unit is used to calculate the RC load difference between each row of gate lines and the maximum row RC load data value and calculate the compensation coefficient of the corresponding row of gate lines;

[0043] The compensation unit is used to obtain the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient and perform load compensation on this row;

[0044] Wherein, the compensation coefficient includes a gate line attenuation coefficient and a process fluctuation coefficient.

[0045] Combined with the display driving device RC load compensation system described in the second aspect, in the first possible implementation manner, the calculation unit includes:

[0046] A ratio unit;

[0047] The ratio unit is used to obtain a first ratio coefficient by using the ratio of the RC load data value of each row and the maximum row RC load data value and obtain a second ratio coefficient by using the first ratio coefficient and the number of compensation regions.

[0048] Combined with the first possible implementation manner of the second aspect, in the second possible implementation manner, the calculation unit further includes:

[0049] A determination unit;

[0050] The determination unit is used to determine the number of compensation regions by using the first ratio coefficient.

[0051] Implementing the display driving device RC load compensation method and system of the present invention, by obtaining the RC load data value carried by each row of gate lines; calculating the RC load difference between each row of gate lines and the maximum row RC load data value; referring to the attenuation coefficient and process fluctuation coefficient during the transmission of the gate line to calculate the RC load compensation value of each row; solves the problem that the existing special-shaped display screen is not accurate enough when calculating the compensation value. Description of the Drawings

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0053] Figure 1 It is a schematic diagram of the first embodiment of the RC load compensation method for a display driving device in the present invention;

[0054] Figure 2 It is a schematic diagram of the second embodiment of the RC load compensation method for a display driving device in the present invention;

[0055] Figure 3 It is a schematic diagram of the third embodiment of the RC load compensation method for a display driving device in the present invention;

[0056] Figure 4 It is a schematic diagram of the fourth embodiment of the RC load compensation method for a display driving device in the present invention;

[0057] Figure 5 It is a schematic diagram of the fifth embodiment of the RC load compensation method for a display driving device in the present invention;

[0058] Figure 6 It is a schematic diagram of the sixth embodiment of the RC load compensation method for a display driving device in the present invention;

[0059] Figure 7 It is a schematic diagram of the seventh embodiment of the RC load compensation method for a display driving device in the present invention;

[0060] Figure 8 It is a schematic diagram of the first embodiment of the RC load compensation system for a display driving device in the present invention;

[0061] Figure 9 It is a schematic diagram of the second embodiment of the RC load compensation system for a display driving device in the present invention;

[0062] Figure 10 It is a schematic diagram of the external block diagram of a common mobile phone display screen;

[0063] Figure 11 It is a partial enlarged view of the norch area of a mobile phone display screen;

[0064] The names of the parts referred to by the numbers in the accompanying drawings are: 10 - detection unit, 20 - calculation unit, 21 - ratio unit, 22 - determination unit, 30 - compensation unit. Detailed implementation manners

[0065] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0067] In the existing special-shaped display screens, when calculating the compensation value, factors such as the attenuation of the gate driving circuit, process capabilities, and production line fluctuations are not considered, resulting in a discounted compensation effect.

[0068] In view of the above problems, a method and system for RC load compensation of a display driving device are proposed.

[0069] Embodiment 1

[0070] As Figure 1 , Figure 1 is a schematic diagram of the first embodiment of the method for RC load compensation of a display driving device in the present invention. A method for RC load compensation of a display driving device includes: Step 100, obtaining the RC load data value carried by each row of gate lines; Step 200, obtaining the RC load difference between each row of gate lines and the maximum row RC load data value according to the RC load data value; Step 300, obtaining the compensation coefficient corresponding to each row of gate lines; Step 400, obtaining the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient; wherein, the compensation coefficient includes the gate line attenuation coefficient and the process fluctuation coefficient.

[0071] As Figure 10 and 11 , Figure 10 is a schematic diagram of the external block diagram of a common mobile phone display screen, Figure 11 is a partial enlarged view of the norch area of a mobile phone display screen; in the norch area of the display device, there are obvious differences in the RC loads corresponding to the gate traces in the rounded corner area and the normal area, and drive compensation needs to be performed on the RC loads corresponding to different gate traces.

[0072] When compensating the RC load carried by the gate lines in the norch area, the compensation coefficient of each row of gate lines needs to be calculated. Since the transmission distance and lines of each row are different, the compensation coefficients are also different.

[0073] Not only the ratio of the minimum row RC load to the maximum row RC load, the compensation range of this gate row, but also the attenuation situation of the output of the gate drive circuit passed to the next stage needs to be considered, which is related to the selection of the driving ability of the GOA circuit. The process ability and the fluctuations of the production line also need to be considered to improve the accuracy of compensation. By obtaining the RC load data values carried by each row of gate lines; calculating the RC load difference between each row of gate lines and the maximum row RC load data value; calculating the RC load compensation value for each row with reference to the attenuation coefficient and the process fluctuation coefficient during the transmission of the gate line, the problem that the existing special-shaped display screen is not accurate enough when calculating the compensation value is solved.

[0074] Embodiment 2

[0075] As Figure 2 , Figure 2 FIG. is a schematic diagram of the second embodiment of the RC load compensation method for the display driving device in the present invention. Step 300 includes: Step 310, calculating a first ratio coefficient by using the ratio of the RC load data value of each row to the maximum row RC load data value; Step 320, calculating a second ratio coefficient by using the first ratio coefficient and the number of compensation regions.

[0076] The first ratio coefficient is the ratio of the RC load value of each row to the maximum RC load data. This ratio is between A% and 100%. The ratio of the minimum RC load data row to the maximum RC load data row can be expressed as A%.

[0077] The second ratio coefficient is the compensation range B% of a certain row of gate lines: that is, (100% - A%) / N = B%, where N is the number of compensation regions.

[0078] Preferably, as Figure 3 , Figure 3 FIG. is a schematic diagram of the third embodiment of the RC load compensation method for the display driving device in the present invention. Step 320 includes: Step 321, determining the number of compensation regions by using the first ratio coefficient; Step 322, calculating the ratio difference between the maximum row RC load data ratio and the minimum row RC load data ratio; Step 323, taking the ratio between the ratio difference and the number of compensation regions as the second ratio coefficient. The second ratio coefficient is the compensation range B% of a certain row of gate lines: that is, (100% - A%) / N = B%, where N is the number of compensation regions.

[0079] Preferably, as Figure 4 , Figure 4It is a schematic diagram of the fourth embodiment of the RC load compensation method for a display driving device in the present invention. Step 321 includes: Step 3211, if the first ratio coefficient is less than the first ratio threshold A% < 20%, then the number of compensation regions takes a value in the first range (greater than 10); Step 3212, if the first ratio coefficient is between the first ratio threshold and the second ratio threshold [20%, 70%], then the number of compensation regions is in the second range [5, 9]; Step 3213, if the first ratio coefficient is greater than the second ratio threshold 70％≤A％ , then the number of compensation regions is a constant value N (preferably 4); wherein, the first ratio threshold is less than the second ratio threshold; the constant value, the second range, and the first range are continuous and gradually increasing data ranges.

[0080] Preferably, as Figure 5 , Figure 5 It is a schematic diagram of the fifth embodiment of the RC load compensation method for a display driving device in the present invention. Step 3212 includes: Step 32121, dividing the data range between the first ratio threshold and the second ratio threshold into multiple consecutive and gradually increasing ratio ranges; Step 32122, corresponding to the multiple consecutive and gradually increasing ratio ranges, the second range is a series of continuously decreasing integer values; Step 32123, making the smallest integer value in the second range corresponding to the largest ratio range greater than the constant value N.

[0081] Preferably, as Figure 6 , Figure 6 It is a schematic diagram of the sixth embodiment of the RC load compensation method for a display driving device in the present invention. The compensation method further includes: Step 500, calculating the load of the driving circuit of each gate line; Step 600, calculating the attenuation coefficient of load compensation according to the load of the driving circuit.

[0082] Preferably, as Figure 7 , Figure 7 It is a schematic diagram of the seventh embodiment of the RC load compensation method for a display driving device in the present invention. The compensation method further includes: Step 700, taking the product value between the second ratio coefficient and the previous region constant as the corrected ratio coefficient (M - 1)B%, where M represents the Mth divided region; Step 800, summing the first ratio coefficient, the corrected ratio coefficient, the gate driving line attenuation coefficient, and the process fluctuation coefficient to obtain the compensation coefficient.

[0083] The compensation method can be implemented as:

[0084] First, calculate and determine the RC load data value carried by each row of gate traces;

[0085] Second, select the row corresponding to the maximum RC load data, and calculate the ratio of the RC load value of each row to the maximum RC load data. This ratio is between A% and 100%, that is, the ratio of the row with the minimum RC load data to the row with the maximum RC load data is A%;

[0086] Third, determine the preliminary RC load data compensation range B%, i.e., (100% - A%) / N = B%, where N is the number of compensation regions, and its recommended value range is as follows.

[0087] If A% < 20%, then N is recommended to take a value of 10 or more;

[0088] If 20% ≤ A% < 30%, then N is recommended to take a value of 9;

[0089] If 30% ≤ A% < 40%, then N is recommended to take a value of 8;

[0090] If 40% ≤ A% < 50%, then N is recommended to take a value of 7;

[0091] If 50% ≤ A% < 60%, then N is recommended to take a value of 6;

[0092] If 60% ≤ A% < 70%, then N is recommended to take a value of 5;

[0093] If 70% ≤ A%, then N is recommended to take a value of 4;

[0094] Fourth, it is necessary to consider the RC load situation of the GOA unit, i.e., the gate driving circuit, the attenuation situation of the output of the gate driving circuit when passing to the next stage, which is related to the driving ability of the selected GOA circuit, and this coefficient is C%;

[0095] Fifth, it is necessary to consider the process capability and the fluctuations of the production line, and this coefficient is D%;

[0096] In summary, the compensation coefficient for driving the scan line in the Mth sub-block region is obtained as: A% + (M - 1)B% + C% + D%.

[0097] Embodiment 3

[0098] Such as Figure 8 , Figure 8 is a schematic diagram of the first embodiment of the RC load compensation system of the display driving device in the present invention. An RC load compensation system of a display driving device adopts the compensation method of the first aspect, and includes a detection unit 10, a calculation unit 20, and a compensation unit 30; the detection unit 10 is used to detect and obtain the RC load data value carried by each row of gate lines; the calculation unit 20 is used to calculate the RC load difference between each row of gate lines and the maximum row RC load data value according to the RC load data value and calculate the compensation coefficient of the corresponding row of gate lines; the compensation unit 30 is used to obtain the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient and perform load compensation on this row, where the compensation coefficient includes the gate line attenuation coefficient and the process fluctuation coefficient.

[0099] Preferably, such as Figure 9 , Figure 9It is a schematic diagram of the second embodiment of the RC load compensation system of the display driving device in the present invention; the calculation unit 20 includes a ratio unit 21; the ratio unit 21 is used to obtain a first ratio coefficient by using the ratio of the RC load data value of each row and the maximum row RC load data value, and obtain a second ratio coefficient by using the first ratio coefficient and the number of compensation regions.

[0100] Preferably, the calculation unit 20 further includes a determination unit 22; the determination unit 22 is used to determine the number of compensation regions by using the first ratio coefficient.

[0101] Implementing the display driving device RC load compensation method and system of the present invention, by obtaining the RC load data value carried by each row of gate lines; calculating the RC load difference between each row of gate lines and the maximum row RC load data value; calculating the RC load compensation value of each row with reference to the attenuation coefficient and process fluctuation coefficient during the transmission of the gate lines; solves the problem that the existing special-shaped display screens are not accurate enough when calculating the compensation value.

[0102] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for compensating RC load in a display driving device, characterized in that Including: Step 100: Obtain the RC load data value carried by each row of gate lines; Step 200: Obtain the RC load difference between each row of gate lines and the maximum row RC load data value according to the RC load data value; Step 300: Obtain the compensation coefficient corresponding to each row of gate lines; Step 400: Obtain the RC load compensation value of the corresponding row according to the RC load difference and the compensation coefficient; Wherein, the compensation coefficient includes a gate line attenuation coefficient and a process fluctuation coefficient; The step 300 includes: Step 310: Calculate the first ratio coefficient by using the ratio of the RC load data value of each row and the maximum row RC load data value; Step 320: Calculate the second ratio coefficient by using the first ratio coefficient and the number of compensation regions; The compensation method further includes: Step 500: Calculate the load of the driving circuit of each gate line; Step 600: Calculate the attenuation coefficient of the load compensation according to the load of the driving circuit; Step 700: Take the product value between the second ratio coefficient and the previous region constant as the corrected ratio coefficient; Step 800: Sum the first ratio coefficient, the corrected ratio coefficient, the gate driving line attenuation coefficient and the process fluctuation coefficient to obtain the compensation coefficient.

2. The display driving device RC load compensation method according to claim 1, characterized in that, The step 320 includes: Step 321: Determine the number of compensation regions by using the first ratio coefficient; Step 322: Calculate the ratio difference between the maximum row RC load data ratio and the minimum row RC load data ratio; Step 323: Take the ratio of the ratio difference and the number of compensation regions as the second ratio coefficient.

3. The display driving device RC load compensation method according to claim 2, characterized in that, The step 321 includes: Step 3211: If the first ratio coefficient is less than the first ratio threshold, the number of compensation regions takes a value in the first range; Step 3212: If the first ratio coefficient is between the first ratio threshold and the second ratio threshold, the number of compensation regions is in the second range; Step 3213: If the first ratio coefficient is greater than the second ratio threshold, the number of compensation regions is a constant value N; Wherein, the first ratio threshold is less than the second ratio threshold; The constant value, the second range, and the first range are continuous and gradually increasing data ranges.

4. The display driving device RC load compensation method according to claim 3, wherein The step 3212 includes: Step 32121: Divide the data range between the first ratio threshold and the second ratio threshold into multiple consecutive and gradually increasing ratio ranges; Step 32122: Corresponding to the multiple consecutive and gradually increasing ratio ranges, the second range is a series of continuously decreasing integer values; Step 32123: Make the smallest integer value in the second range corresponding to the largest ratio range greater than the constant value N.

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