GOA circuit driving method of special-shaped display screen and special-shaped display screen

Abstract

The invention discloses a GOA circuit driving method of a special-shaped display screen and the special-shaped display screen, and the method comprises the steps: obtaining a correction coefficient, calculating the pixel proportion of a special-shaped region and a normal region, the transistor size proportion and the coupling capacitance proportion, calculating a main transistor compensation coefficient and a coupling capacitance compensation coefficient of the row of the special-shaped area according to the correction coefficient, the pixel proportion, the transistor size proportion and the coupling capacitance proportion; compensating the main transistor and the coupling capacitor in the row by using the main transistor compensation coefficient and the coupling capacitor compensation coefficient; and after compensation, the GOA circuit is used for driving and scanning the row of pixels. The load difference with the normal area can be balanced by only adjusting the main transistor parameter and the coupling capacitance parameter of the row of the special-shaped area, the design time is saved, and the research and development process is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of load compensation for special-shaped display screens, and in particular to a GOA circuit driving method for a special-shaped display screen and the special-shaped display screen. Background Art

[0002] GOA (gate on array) technology is gaining popularity among consumers due to its ability to reduce display bezels. Consequently, it is being adopted by an increasing number of displays. With the advancement of optoelectronic display technology, the shapes of display devices have also diversified, with notch-shaped and rounded corners common in mobile phone displays. This demand for diverse display device shapes has forced upstream manufacturers to consider a wide range of display shapes, moving beyond the traditional rectangular form factor.

[0003] Display screens with non-rectangular display areas have different RC loading compared to normal display areas, which can lead to display differences between the non-rectangular areas and normal areas. This difference can cause uneven display on the display screen. That is, the notch area or the rounded corner area has different display brightness compared to other normal areas due to inconsistent load, affecting the display effect and reducing the consumer experience.

[0004] like Figure 1-3 Since the GOA circuit is divided into functional blocks, it can be divided into multiple parts such as forward and reverse scanning units, pull-up units, pull-down units, and voltage stabilization units. If the parameters such as transistors and capacitors of the GOA circuit are adjusted to match the different RC loading data of the display area, it will take a lot of time. The load corresponding to each level of the GOA circuit in the rounded corner area is different, so the parameters of each level of the GOA circuit need to be adjusted. The existing GOA parameters include components such as multiple TFT transistors and multiple capacitors. For example, a 10T2C circuit includes 10 transistors and 2 capacitors. If a row of pixels corresponds to a level of GOA circuit, 12 components need to be adjusted, which is very time-consuming for designers and prolongs the product development schedule. Summary of the Invention

[0005] In the existing technology, there is abnormal display brightness between the irregular-shaped area and the normal area of the display screen. If the load difference between the two is reduced and the brightness difference is eliminated by adjusting the GOA circuit parameters, it will cost a lot of time for R&D personnel, resulting in a slowdown in R&D progress.

[0006] In response to the above problems, a GOA circuit driving method for a special-shaped display screen and a special-shaped display screen are proposed. The main transistor compensation coefficient and the coupling capacitor compensation coefficient of the row in the special-shaped area are calculated by using the correction coefficient, the pixel ratio, the transistor size ratio and the coupling capacitor ratio. The main transistor compensation coefficient and the coupling capacitor compensation coefficient are used to compensate the main transistor and the coupling capacitor of the row. Only the main transistor parameters and the coupling capacitor parameters of the row in the special-shaped area need to be adjusted to balance the load difference with the normal area, saving design time and shortening the research and development process.

[0007] In a first aspect, a GOA circuit driving method for a special-shaped display screen includes: Step 100: Obtain correction coefficients, calculate the pixel ratio, transistor size ratio, and coupling capacitance ratio of the irregular-shaped area and the normal area, and calculate the main transistor compensation coefficient and coupling capacitance compensation coefficient of the row in the irregular-shaped area based on the correction coefficients, the pixel ratio, the transistor size ratio, and the coupling capacitance ratio; Step 200: Compensate the main transistors and coupling capacitors of the row using the main transistor compensation coefficient and the coupling capacitor compensation coefficient; Step 300: After compensation, drive and scan the row of pixels using the GOA circuit.

[0008] In conjunction with the GOA circuit driving method for a special-shaped display screen according to the first aspect of the present invention, in a first possible implementation, step 100 includes: Step 110: Obtain the first pixel number of the current row of the irregular-shaped area and the second pixel number of the normal area row; Step 120: Calculate the pixel ratio according to the first number of pixels and the second number of pixels.

[0009] In conjunction with the GOA circuit driving method for a special-shaped display screen described in the first aspect of the present invention, in a second possible implementation, step 100 includes: Step 130 , obtaining a first transistor size of a current row in the irregular-shaped area and a second transistor size of a row in the normal area; Step 140: Calculate the transistor size ratio according to the first transistor size and the second transistor size.

[0010] In conjunction with the GOA circuit driving method for a special-shaped display screen described in the first aspect of the present invention, in a third possible implementation, step 100 includes: Step 150: Obtain the first coupling capacitor of the current row of the irregular-shaped area and the second coupling capacitor of the row of the normal area; Step 160: Calculate the coupling capacitance ratio according to the first coupling capacitance and the second coupling capacitance.

[0011] In conjunction with the GOA circuit driving method for a special-shaped display screen described in the first aspect of the present invention, in a fourth possible implementation, step 100 includes: Step 170: Obtain the correction coefficient, pixel ratio, and transistor size ratio; Step 180: Calculate the main transistor compensation coefficient using formula (1): Main transistor compensation coefficient = pixel ratio + transistor size ratio / 2*correction coefficient (1).

[0012] In conjunction with the GOA circuit driving method for a special-shaped display screen described in the first aspect of the present invention, in a fifth possible implementation, step 100 includes: Step 190: Obtain the correction coefficient, pixel ratio, and coupling capacitance ratio; Step 191: Calculate the coupling capacitance compensation coefficient using formula (2): Coupling capacitance compensation coefficient = pixel ratio + coupling capacitance ratio / 2*correction coefficient (2).

[0013] In conjunction with the GOA circuit driving method for a special-shaped display screen according to the first aspect of the present invention, in a sixth possible implementation, step 200 includes: Step 210: Adjust the parameters of the main transistors of the row according to the main transistor compensation coefficient; Step 220: Adjust the coupling capacitance parameters of the row according to the coupling capacitance compensation coefficient.

[0014] In a second aspect, a special-shaped display screen adopts the GOA circuit driving method of the special-shaped display screen described in the first aspect, comprising: control unit; Array circuit; The control unit is electrically connected to the array circuit; The array circuit includes a pixel array, a gate line, a data line, and a GOA circuit. The gate lines and the data lines are electrically connected to the pixel units of each row and each column in the pixel array respectively; Each of the GOA circuits is electrically connected to a gate line of a corresponding row; The control unit is electrically connected to each of the GOA circuits and data lines via a signal line, for Obtain a correction coefficient, calculate the pixel ratio, transistor size ratio, and coupling capacitance ratio of the irregular-shaped area and the normal area, calculate the main transistor compensation coefficient and coupling capacitance compensation coefficient of the row of the irregular-shaped area according to the correction coefficient, the pixel ratio, the transistor size ratio, and the coupling capacitance ratio, use the main transistor compensation coefficient and coupling capacitance compensation coefficient to compensate the main transistor and coupling capacitance of the row, and after compensation, use the GOA circuit to drive and scan the pixels of the row.

[0015] In combination with the special-shaped display screen described in the second aspect of the present invention, in a first possible implementation manner, the control unit is further used to: obtain a first pixel number in a current row of the special-shaped area and a second pixel number in a normal area row, calculate the pixel ratio based on the first pixel number and the second pixel number, obtain a first transistor size in the current row of the special-shaped area and a second transistor size in the normal area row, calculate the transistor size ratio based on the first transistor size and the second transistor size, obtain a first coupling capacitor in the current row of the special-shaped area and a second coupling capacitor in the normal area row, and calculate the coupling capacitor ratio based on the first coupling capacitor and the second coupling capacitor.

[0016] In conjunction with the GOA circuit driving method for a special-shaped display screen according to the second aspect of the present invention, in a second possible implementation manner, the control unit is further configured to: Obtain the correction coefficient, pixel ratio and transistor size ratio, and use formula (1) to calculate the main transistor compensation coefficient: Main transistor compensation coefficient = pixel ratio + transistor size ratio / 2 * correction coefficient (1); Obtaining the correction coefficient, pixel ratio and coupling capacitance ratio; The coupling capacitance compensation coefficient is calculated using formula (2): Coupling capacitance compensation coefficient = pixel ratio + coupling capacitance ratio / 2*correction coefficient (2).

[0017] The GOA circuit driving method for a special-shaped display screen and the special-shaped display screen described in the present invention calculate the main transistor compensation coefficient and the coupling capacitor compensation coefficient of the row in the special-shaped area by using the correction coefficient, the pixel ratio, the transistor size ratio and the coupling capacitor ratio, and use the main transistor compensation coefficient and the coupling capacitor compensation coefficient to compensate the main transistor and the coupling capacitor of the row. Only the main transistor parameters and the coupling capacitor parameters of the row in the special-shaped area need to be adjusted to balance the load difference with the normal area, thereby saving design time and shortening the research and development process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0019] Figure 1 It is a special-shaped display screen; Figure 2 yes Figure 1 Schematic diagram of the heteromorphic area in ; Figure 3 This is the GOA circuit schematic; Figure 4 This is a flow chart of a specific embodiment of the GOA circuit driving method for a special-shaped display screen in the present application; Figure 5 yes Figure 4 A schematic flow chart of a first specific embodiment of step 100; Figure 6 yes Figure 4 A schematic flow chart of a second specific embodiment of step 100; Figure 7 yes Figure 4 A schematic flow chart of a third specific embodiment of step 100; Figure 8 yes Figure 4 A schematic flow chart of a fourth specific embodiment of step 100; Figure 9 yes Figure 4 A fifth specific embodiment flow chart of step 100; Figure 10 yes Figure 4 A schematic flow chart of a specific embodiment of step 200; Figure 11 This is a schematic diagram of a specific embodiment of the special-shaped display screen in this application. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the existing technology, there is abnormal display brightness between the irregular-shaped area and the normal area of the display screen. If the load difference between the two is reduced and the brightness difference is eliminated by adjusting the GOA circuit parameters, it will cost a lot of time for R&D personnel, resulting in a slowdown in R&D progress.

[0026] In order to solve the above problems, a GOA circuit driving method for a special-shaped display screen and a special-shaped display screen are proposed.

[0027] In the first aspect, a GOA circuit driving method for a special-shaped display screen is provided. Figure 4 , Figure 4 This is a flow chart of a specific embodiment of the GOA circuit driving method for a special-shaped display screen in the present application; it includes: Step 100: Obtain correction coefficients, calculate the pixel ratio, transistor size ratio, and coupling capacitor ratio of the irregular-shaped area and the normal area, and calculate the main transistor compensation coefficient and coupling capacitor compensation coefficient of the row in the irregular-shaped area based on the correction coefficients, pixel ratio, transistor size ratio, and coupling capacitor ratio.

[0028] In one possible implementation, Figure 5 , Figure 5 yes Figure 4 Flow chart of the first specific embodiment of step 100; step 100 includes: step 110, obtaining the first pixel number of the current row of the irregular area and the second pixel number of the normal area row; step 120, calculating the pixel ratio according to the first pixel number and the second pixel number.

[0029] In this embodiment, the irregular area is generally the rounded corner area of the display screen or the display screen area corresponding to the camera area, and the normal area is the AA display area of the display screen. Generally speaking, the number of row pixels in the irregular area is smaller than the number of pixels in the AA display area, and the compensation coefficient is calculated by obtaining their ratio.

[0030] In one possible implementation, Figure 6 , Figure 6 yes Figure 4 Flow chart of a second specific embodiment of step 100; step 100 includes: step 130, obtaining the first transistor size of the current row of the irregular area and the second transistor size of the normal area row; step 140, calculating the transistor size ratio according to the first transistor size and the second transistor size.

[0031] In this embodiment, the irregular area is generally the rounded corner area of the display screen or the display screen area corresponding to the camera area, and the normal area is the AA display area of the display screen. Generally speaking, the transistor size and coupling capacitance of the irregular area are smaller than the main transistor size of the AA display area, and the compensation coefficient is calculated by obtaining their ratio.

[0032] In one possible implementation, Figure 7 , Figure 7 yes Figure 4 Flow chart of the third specific embodiment of step 100; step 100 includes: step 150, obtaining the first coupling capacitor of the current row of the irregular area and the second coupling capacitor of the normal area row; step 160, calculating the coupling capacitor ratio according to the first coupling capacitor and the second coupling capacitor.

[0033] In this embodiment, the irregular area is generally the rounded corner area of the display screen or the display screen area corresponding to the camera area, and the normal area is the AA display area of the display screen. Generally speaking, the coupling capacitance of the irregular area is smaller than the coupling capacitance of the AA display area, and the compensation coefficient is calculated by obtaining their ratio.

[0034] In one possible implementation, Figure 8 , Figure 8 yes Figure 4A flowchart of a fourth specific embodiment of step 100 in FIG. 1 ; step 100 includes: step 170, obtaining a correction coefficient, a pixel ratio, and a transistor size ratio; step 180, calculating a main transistor compensation coefficient using equation (1): Main transistor compensation coefficient = pixel ratio + transistor size ratio / 2*correction coefficient (1).

[0035] In one possible implementation, Figure 9 , Figure 9 yes Figure 4 A flowchart of a fifth specific embodiment of step 100 in FIG. 1 ; step 100 includes: step 190, obtaining a correction coefficient, a pixel ratio, and a coupling capacitance ratio; step 191, calculating a coupling capacitance compensation coefficient using equation (2): Coupling capacitance compensation coefficient = pixel ratio + coupling capacitance ratio / 2*correction coefficient (2).

[0036] In this embodiment, the irregular area is generally the rounded corner area of the display screen or the display screen area corresponding to the camera area, and the normal area is the AA display area of the display screen. Generally speaking, the number of row pixels, transistor size and coupling capacitance of the irregular area are smaller than the number of pixels, main transistor size and coupling capacitance of the AA display area, and the compensation coefficient is calculated by obtaining their ratio.

[0037] Step 200 : Compensate the main transistors and coupling capacitors of the row using the main transistor compensation coefficient and the coupling capacitor compensation coefficient.

[0038] In one possible implementation, Figure 10 , Figure 10 yes Figure 4 A flow chart of a specific embodiment of step 200 is provided; step 200 includes: step 210, adjusting the main transistor parameters of the row according to the main transistor compensation coefficient; step 220, adjusting the coupling capacitor parameters of the row according to the coupling capacitor compensation coefficient.

[0039] Step 300: After compensation, drive and scan the row of pixels using the GOA circuit.

[0040] In an embodiment of the present application, the main transistor compensation coefficient and the coupling capacitor compensation coefficient of the row in the irregular area are calculated by using the correction coefficient, the pixel ratio, the transistor size ratio and the coupling capacitor ratio, and the main transistor compensation coefficient and the coupling capacitor compensation coefficient are used to compensate the main transistor and the coupling capacitor of the row. Only the main transistor parameters and the coupling capacitor parameters of the row in the irregular area need to be adjusted to balance the load difference with the normal area, thereby saving design time and shortening the research and development process.

[0041] In the second aspect, a special-shaped display screen, such as Figure 11 , Figure 11 The figure is a schematic diagram of a specific embodiment of the irregular display screen in the present application. A GOA circuit driving method for an irregular display screen using the first aspect includes a control unit and an array circuit; the control unit is electrically connected to the array circuit; the array circuit includes a pixel array, gate lines, data lines, and the GOA circuit gate lines and data lines are electrically connected to the pixel units in each row and each column of the pixel array; each GOA circuit is electrically connected to the gate lines of the corresponding row; the control unit is electrically connected to each GOA circuit and data line via a signal line, and the control unit is configured to obtain a correction coefficient, calculate the pixel ratio, transistor size ratio, and coupling capacitance ratio of the irregular region to the normal region, calculate the main transistor compensation coefficient and coupling capacitance compensation coefficient of the row in the irregular region based on the correction coefficient, pixel ratio, transistor size ratio, and coupling capacitance ratio, compensate the main transistor and coupling capacitance of the row using the main transistor compensation coefficient and coupling capacitance compensation coefficient, and after compensation, drive and scan the pixels in the row using the GOA circuit.

[0042] The control unit is further used to: obtain a first pixel number in a current row of the irregularly shaped area and a second pixel number in a row of the normal area, calculate a pixel ratio based on the first pixel number and the second pixel number, obtain a first transistor size in a current row of the irregularly shaped area and a second transistor size in a row of the normal area, calculate a transistor size ratio based on the first transistor size and the second transistor size, obtain a first coupling capacitor in a current row of the irregularly shaped area and a second coupling capacitor in a row of the normal area, and calculate a coupling capacitor ratio based on the first coupling capacitor and the second coupling capacitor.

[0043] The control unit is further configured to: Obtain the correction coefficient, pixel ratio, and transistor size ratio, and use formula (1) to calculate the main transistor compensation coefficient: Main transistor compensation coefficient = pixel ratio + transistor size ratio / 2 * correction coefficient (1); Obtain correction coefficient, pixel ratio and coupling capacitance ratio; Use formula (2) to calculate the coupling capacitance compensation coefficient: Coupling capacitance compensation coefficient = pixel ratio + coupling capacitance ratio / 2*correction coefficient (2).

[0044] The GOA circuit driving method for a special-shaped display screen and the special-shaped display screen of the present invention calculate the main transistor compensation coefficient and the coupling capacitor compensation coefficient of the row in the special-shaped area by using the correction coefficient, the pixel ratio, the transistor size ratio and the coupling capacitor ratio, and use the main transistor compensation coefficient and the coupling capacitor compensation coefficient to compensate the main transistor and the coupling capacitor of the row. Only the main transistor parameters and the coupling capacitor parameters of the row in the special-shaped area need to be adjusted to balance the load difference with the normal area, thereby saving design time and shortening the research and development process.

[0045] The above are only 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A GOA circuit driving method for a special-shaped display screen, characterized in that: include: Step 100: Obtain correction coefficients, calculate the pixel ratio, transistor size ratio, and coupling capacitance ratio of the irregular-shaped area and the normal area, and calculate the main transistor compensation coefficient and coupling capacitance compensation coefficient of the row in the irregular-shaped area based on the correction coefficients, the pixel ratio, the transistor size ratio, and the coupling capacitance ratio; Step 200: Compensate the main transistors and coupling capacitors of the row using the main transistor compensation coefficient and the coupling capacitor compensation coefficient; Step 300: After compensation, drive and scan the row of pixels using the GOA circuit.

2. The GOA circuit driving method for a special-shaped display screen according to claim 1, wherein: The step 100 includes: Step 110: Obtain the first pixel number of the current row of the irregular-shaped area and the second pixel number of the normal area row; Step 120: Calculate the pixel ratio according to the first number of pixels and the second number of pixels.

3. The GOA circuit driving method for a special-shaped display screen according to claim 1, wherein: The step 100 includes: Step 130 , obtaining a first transistor size of a current row in the irregular-shaped area and a second transistor size of a row in the normal area; Step 140: Calculate the transistor size ratio according to the first transistor size and the second transistor size.

4. The GOA circuit driving method for a special-shaped display screen according to claim 1, wherein: The step 100 includes: Step 150: Obtain the first coupling capacitance of the current row of the irregular-shaped area and the second coupling capacitance of the row of the normal area; Step 160: Calculate the coupling capacitance ratio according to the first coupling capacitance and the second coupling capacitance.

5. The GOA circuit driving method for a special-shaped display screen according to claim 1, wherein: The step 100 includes: Step 170: Obtain the correction coefficient, pixel ratio, and transistor size ratio; Step 180: Calculate the main transistor compensation coefficient using formula (1): Main transistor compensation coefficient = pixel ratio + transistor size ratio / 2*correction coefficient (1).

6. The GOA circuit driving method for a special-shaped display screen according to claim 1, wherein: The step 100 includes: Step 190: Obtain the correction coefficient, pixel ratio, and coupling capacitance ratio; Step 191: Calculate the coupling capacitance compensation coefficient using formula (2): Coupling capacitance compensation coefficient = pixel ratio + coupling capacitance ratio / 2*correction coefficient (2).

7. The GOA circuit driving method for a special-shaped display screen according to claim 1, wherein: The step 200 includes: Step 210: Adjust the parameters of the main transistors of the row according to the main transistor compensation coefficient; Step 220: Adjust the coupling capacitance parameters of the row according to the coupling capacitance compensation coefficient.

8. A special-shaped display screen, using the GOA circuit driving method of the special-shaped display screen according to any one of claims 1 to 7, characterized in that: include: control unit; Array circuit; The control unit is electrically connected to the array circuit; The array circuit includes a pixel array, a gate line, a data line, a GOA circuit The gate lines and the data lines are electrically connected to the pixel units of each row and each column in the pixel array respectively; Each of the GOA circuits is electrically connected to a gate line of a corresponding row; The control unit is electrically connected to each of the GOA circuits and data lines via a signal line, for Obtain a correction coefficient, calculate the pixel ratio, transistor size ratio, and coupling capacitance ratio of the irregular-shaped area and the normal area, calculate the main transistor compensation coefficient and coupling capacitance compensation coefficient of the row of the irregular-shaped area according to the correction coefficient, the pixel ratio, the transistor size ratio, and the coupling capacitance ratio, use the main transistor compensation coefficient and coupling capacitance compensation coefficient to compensate the main transistor and coupling capacitance of the row, and after compensation, use the GOA circuit to drive and scan the pixels of the row.

9. The special-shaped display screen according to claim 8, characterized in that: The control unit is further used to: obtain a first pixel number in a current row of the irregularly shaped area and a second pixel number in a normal area row, calculate the pixel ratio based on the first pixel number and the second pixel number, obtain a first transistor size in a current row of the irregularly shaped area and a second transistor size in a normal area row, calculate the transistor size ratio based on the first transistor size and the second transistor size, obtain a first coupling capacitor in a current row of the irregularly shaped area and a second coupling capacitor in a normal area row, and calculate the coupling capacitor ratio based on the first coupling capacitor and the second coupling capacitor.

10. The special-shaped display screen according to claim 8, characterized in that: The control unit is further configured to: Obtain the correction coefficient, pixel ratio and transistor size ratio, and use formula (1) to calculate the main transistor compensation coefficient: Main transistor compensation coefficient = pixel ratio + transistor size ratio / 2 * correction coefficient (1); Obtaining the correction coefficient, pixel ratio and coupling capacitance ratio; The coupling capacitance compensation coefficient is calculated using formula (2): Coupling capacitance compensation coefficient = pixel ratio + coupling capacitance ratio / 2*correction coefficient (2).

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