Compensation circuit, circuit board assembly and electronic equipment

Abstract

The embodiment of the invention provides a compensation circuit, a circuit board assembly and electronic equipment, relates to the technical field of display, and is used for compensating the voltage drop of power supply voltage signals received at the two ends of a display panel and improving the display effect of the display panel. The compensation circuit comprises a receiving sub-circuit, a first calculation sub-circuit and a second calculation sub-circuit. The receiving sub-circuit comprises an addition module and a voltage following module, the addition module is used for receiving the first power supply voltage signal and the second power supply voltage signal, and the output end of the addition module is coupled with the input end of the voltage following module. The voltage following module is used for outputting following voltage signals. The first calculation sub-circuit is used for receiving a first reference voltage and a following voltage signal and outputting a first gamma signal. The second calculation sub-circuit is used for receiving a second reference voltage and the following voltage signal and outputting a second gamma signal. The compensation circuit is applied to the electronic equipment so as to improve the performance of the electronic equipment.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a compensation circuit, a circuit board assembly and an electronic device. Background Art

[0002] Organic light-emitting diode (OLED) display panels are widely used in electronic devices due to their self-luminescence, low driving power consumption, high light conversion efficiency, short response time and low cost. OLED display panels include multiple sub-pixels, each of which includes a pixel driving circuit and a light-emitting device. The pixel driving circuit is used to drive the light-emitting device to emit light.

[0003] Electronic devices can provide power supply voltage signals to both ends of the OLED display panel through a power management integrated circuit (PMIC), and the power supply voltage signal is transmitted to the pixel driving circuit to generate a driving current. The magnitude of the driving current affects the brightness of the light-emitting device. Since the transmission path between the power management circuit and the OLED display panel is long, the power supply voltage signal is prone to a large voltage drop (IR Drop) during the transmission process. The existence of the voltage drop will not only affect the display effect of the sub-pixels in the OLED display panel, but also affect the brightness consistency of different OLED display panels of the same specifications. Summary of the invention

[0004] The embodiments of the present application provide a compensation circuit, a circuit board assembly and an electronic device for compensating for the voltage drop of a power supply voltage signal received at both ends of a display panel, thereby improving the display effect of the display panel and ensuring the consistency of brightness of different display panels of the same specification.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a compensation circuit is provided. The compensation circuit includes a receiving subcircuit, a first calculation subcircuit, and a second calculation subcircuit. The receiving subcircuit includes an adding module and a voltage following module, wherein the adding module is used to receive a first power supply voltage signal and a second power supply voltage signal, and the output end of the adding module is coupled to the input end of the voltage following module; the voltage following module is used to output a following voltage signal. The first calculation subcircuit is used to receive a first reference voltage and the following voltage signal, and output a first gamma signal; the voltage value of the first gamma signal is the sum of the voltage values ​​of the first reference voltage and the following voltage signal. The second calculation subcircuit is used to receive a second reference voltage and the following voltage signal, and output a second gamma signal; the voltage value of the second gamma signal is the difference between the voltage values ​​of the second reference voltage and the following voltage signal.

[0007] The compensation circuit provided in the embodiment of the present application first generates a following voltage signal based on the first power supply voltage signal and the second power supply voltage signal using an addition module and a voltage following module, and then generates a first gamma signal and a second gamma signal based on the following voltage signal using a first calculation subcircuit and a second calculation subcircuit. The voltage value of the first gamma signal is the sum of the voltage values ​​of the first reference voltage and the following voltage signal, so that the voltage value of the first power supply voltage signal and the voltage value of the second power supply voltage signal can be compensated in the first gamma signal. The second gamma signal is the difference between the voltage value of the second reference voltage and the following voltage signal, so that the voltage value of the first power supply voltage signal and the voltage value of the second power supply voltage signal can also be compensated in the second gamma signal.

[0008] When the compensation circuit provided in the embodiment of the present application is applied to an electronic device, the output end of the compensation circuit (i.e., the output end of the first calculation subcircuit and the output end of the second calculation subcircuit) can be connected to the input end of the source driver to transmit the first gamma signal and the second gamma signal to the source driver. The source driver can generate a data voltage signal according to the first gamma signal and the second gamma signal. In this way, the voltage value of the first power supply voltage signal and the voltage value of the second power supply voltage signal are compensated in the data voltage signal.

[0009] After the data voltage signal is input into the pixel driving circuit, the pixel circuit generates a driving current according to the data voltage signal, the first power supply voltage signal, and the second power supply voltage signal. Since the voltage values ​​of the first power supply voltage signal and the second power supply voltage signal are compensated in the data voltage signal, the influence of the voltage drop of the first power supply voltage signal and the second power supply voltage signal on the driving current can be eliminated, and the voltage drop of the first power supply voltage signal and the voltage drop of the second power supply voltage signal can be compensated, thereby improving the problem of small driving current, dark display panel brightness, and poor display effect caused by the voltage drop between the first power supply voltage signal and the second power supply voltage signal.

[0010] For different electronic devices of the same specification, the voltage drop of the first power supply voltage signal and the voltage drop of the second power supply voltage signal may differ due to factors such as display panel loading and wiring impedance, thereby resulting in brightness differences between display panels of electronic devices of the same specification. The embodiment of the present application utilizes a compensation circuit to compensate for the voltage drop of the first power supply voltage signal and the voltage drop of the second power supply voltage signal, thereby improving or even solving the problem of brightness differences between display panels caused by different voltage drops of the first power supply voltage signal and the second power supply voltage signal in different electronic devices of the same specification.

[0011] In some embodiments, the adding module includes a first resistor, a second resistor, a third resistor, a fourth resistor and a first operational amplifier. The first end of the first resistor is used to receive the first power supply voltage signal, the first end of the second resistor is used to receive the second power supply voltage signal, the second end of the first resistor and the second end of the second resistor are both connected to the in-phase input of the first operational amplifier. The first end of the third resistor is connected to the ground terminal, and the second end of the third resistor is connected to the inverting input of the first operational amplifier. The first end of the fourth resistor is connected to the inverting input of the first operational amplifier, and the second end of the fourth resistor and the output of the first operational amplifier are both coupled to the input of the voltage follower module.

[0012] In some embodiments, the voltage follower module includes a voltage follower, a first input terminal of the voltage follower is connected to an output terminal of the addition module, a second input terminal of the voltage follower is coupled to an output terminal of the voltage follower; an output terminal of the voltage follower is connected to an input terminal of the first calculation subcircuit and an input terminal of the second calculation subcircuit. The voltage follower is used to receive the follow voltage signal output by the addition module, and output the follow voltage signal to the first calculation subcircuit and the second calculation subcircuit.

[0013] In the embodiment of the present application, the adding module and the voltage following module are both analog circuits, and the following voltage signal output by the receiving sub-circuit is an analog signal. Since the analog signal has the characteristics of precise resolution and easy processing, when the first gamma signal and the second gamma signal are generated by using the following voltage signal, the accuracy of the first gamma signal and the second gamma signal can be improved, thereby ensuring the compensation effect of the compensation circuit on the voltage drop of the first power supply voltage signal and the voltage drop of the second power supply voltage signal.

[0014] In some embodiments, the voltage value of the follower voltage signal is the sum of a first product and a second product, the first product is the product of the voltage value of the first power supply voltage signal and a first coefficient, and the second product is the product of the voltage value of the second power supply voltage signal and a second coefficient. The first coefficient and the second coefficient are both greater than or equal to 0, and the first coefficient and the second coefficient are not 0 at the same time.

[0015] The embodiment of the present application can adjust the weight of the first power supply voltage signal and the weight of the second power supply voltage signal in the follower voltage signal by adjusting the value of the first coefficient and the value of the second coefficient. The voltage value of the first gamma signal is the sum of the voltage values ​​of the first reference voltage and the follower voltage signal. Adjusting the weight of the first power supply voltage signal and the weight of the second power supply voltage signal in the follower voltage signal can affect the weight of the first power supply voltage signal and the weight of the second power supply voltage signal in the first gamma signal. The second gamma signal is the difference between the voltage values ​​of the second reference voltage and the follower voltage signal. Adjusting the weight of the first power supply voltage signal and the weight of the second power supply voltage signal in the follower voltage signal can affect the weight of the first power supply voltage signal and the weight of the second power supply voltage signal in the second gamma signal.

[0016] Since the data voltage signal is obtained based on the first gamma signal and the second gamma signal, adjusting the value of the first coefficient and the value of the second coefficient can affect the weight of the first power supply voltage signal and the weight of the second power supply voltage signal in the data voltage signal, that is, affect the compensation strength of the first power supply voltage signal and the compensation strength of the second power supply voltage signal in the data voltage signal.

[0017] In this way, the compensation circuit can be adapted to different electronic devices, thereby improving the applicability of the compensation circuit. At the same time, for a single electronic device, the first coefficient and the second coefficient that can adjust the compensation strength of the first power supply voltage signal and the second power supply voltage signal can be set, and when the voltage drop of the first power supply voltage signal and the voltage drop of the second power supply voltage signal are different, the first power supply voltage signal and the second power supply voltage signal can be compensated according to actual needs, thereby improving the compensation effect, thereby further improving the display effect of the display panel.

[0018] In some embodiments, the first calculation subcircuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a third operational amplifier. The first end of the fifth resistor is used to receive the first reference voltage, and the first end of the sixth resistor is used to receive the follow voltage signal; the second end of the fifth resistor and the second end of the sixth resistor are both connected to the in-phase input of the third operational amplifier. The first end of the seventh resistor is connected to the ground terminal, and the second end of the seventh resistor is connected to the inverting input of the third operational amplifier. The first end of the eighth resistor is connected to the inverting input of the third operational amplifier and the second end of the seventh resistor, and the second end of the eighth resistor is connected to the output of the third operational amplifier. Among them, the fifth resistor has the same resistance value as the sixth resistor, and the seventh resistor has the same resistance value as the eighth resistor.

[0019] In the embodiment of the present application, the first calculation sub-circuit is also an analog circuit. The first gamma signal output by the first calculation sub-circuit is an analog signal. The analog signal has the characteristics of precise resolution and easy processing. When the first gamma signal is used to generate a data voltage signal, it is beneficial to improve the accuracy of the data voltage signal, thereby improving the compensation accuracy of the data voltage signal for the first power supply voltage signal and the second power supply voltage signal.

[0020] In some embodiments, the second calculation subcircuit includes a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a fourth operational amplifier. The first end of the ninth resistor is used to receive the follow voltage signal, the first end of the tenth resistor is connected to the ground terminal, and the second end of the ninth resistor and the second end of the tenth resistor are both connected to the non-inverting input terminal of the fourth operational amplifier. The first end of the eleventh resistor is used to receive the second reference voltage, and the second end of the eleventh resistor is connected to the inverting input terminal of the fourth operational amplifier. The first end of the twelfth resistor is connected to the inverting input terminal of the fourth operational amplifier and the second end of the eleventh resistor, and the second end of the twelfth resistor is connected to the output terminal of the fourth operational amplifier. Among them, the ninth resistor has the same resistance value as the tenth resistor, and the eleventh resistor has the same resistance value as the twelfth resistor.

[0021] In the embodiment of the present application, the second calculation sub-circuit is an analog circuit, and the second gamma signal output by the second calculation sub-circuit is an analog signal. The analog signal has the characteristics of precise resolution and easy processing. When the second gamma signal is used to generate a data voltage signal, it is beneficial to improve the accuracy of the data voltage signal, thereby improving the compensation accuracy of the data voltage signal for the first power supply voltage signal and the second power supply voltage signal.

[0022] In some embodiments, the compensation circuit also includes a generating subcircuit, and the input end of the first calculating subcircuit and the input end of the second calculating subcircuit are both connected to the output end of the generating subcircuit; the generating subcircuit is used to output the first reference voltage to the first calculating subcircuit and output the second reference voltage to the second calculating subcircuit.

[0023] In some embodiments, the generating subcircuit includes a first voltage dividing unit and a second voltage dividing unit. The input end of the first voltage dividing unit is used to receive the reference voltage, and the output end of the first voltage dividing unit outputs the first reference voltage. The input end of the second voltage dividing unit is used to receive the reference voltage, and the output end of the second voltage dividing unit outputs the second reference voltage.

[0024] In some embodiments, the first voltage dividing unit includes a thirteenth resistor and a fourteenth resistor connected to each other, the first end of the thirteenth resistor is used to receive the reference voltage; the second end of the thirteenth resistor is connected to the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected to the ground end; the second end of the thirteenth resistor and the first end of the fourteenth resistor are both coupled to the input end of the first calculation sub-circuit.

[0025] In the embodiment of the present application, the thirteenth resistor and the fourteenth resistor are used to form a voltage divider circuit, so as to generate a first reference voltage using the reference voltage. The voltage value of the first reference voltage is less than the voltage value of the reference voltage. The resistance value of the thirteenth resistor and the resistance value of the fourteenth resistor can be adjusted according to the magnitude of the reference voltage and the first reference voltage.

[0026] The second voltage-dividing unit includes a fifteenth resistor and a sixteenth resistor connected to each other, the first end of the fifteenth resistor is used to receive the reference voltage, the second end of the fifteenth resistor is connected to the first end of the sixteenth resistor, and the second end of the sixteenth resistor is connected to the ground end; the second end of the fifteenth resistor and the first end of the sixteenth resistor are both coupled to the input end of the second calculation sub-circuit.

[0027] In the embodiment of the present application, the fifteenth resistor and the sixteenth resistor are used to form a voltage divider circuit, so as to generate a second reference voltage using the reference voltage. The voltage value of the second reference voltage is less than the voltage value of the reference voltage. The resistance value of the fifteenth resistor and the resistance value of the sixteenth resistor can be adjusted according to the magnitude of the reference voltage and the second reference voltage.

[0028] In some embodiments, the generating subcircuit includes a seventeenth resistor, an eighteenth resistor, and a nineteenth resistor. The first end of the seventeenth resistor is used to receive the reference voltage, the second end of the seventeenth resistor is connected to the first end of the eighteenth resistor, the second end of the eighteenth resistor is connected to the first end of the nineteenth resistor, and the second end of the nineteenth resistor is connected to the ground terminal. The second end of the seventeenth resistor and the first end of the eighteenth resistor are both coupled to the input end of the first calculating subcircuit. The second end of the eighteenth resistor and the first end of the nineteenth resistor are both coupled to the input end of the second calculating subcircuit.

[0029] In the embodiment of the present application, the seventeenth resistor, the eighteenth resistor and the nineteenth resistor are used to form a voltage divider circuit, so that the node voltage between the seventeenth resistor and the eighteenth resistor (that is, the first reference voltage) is less than the reference voltage, and the node voltage between the eighteenth resistor and the nineteenth resistor (that is, the second reference voltage) is less than the reference voltage. By adjusting the resistance values ​​of the seventeenth resistor, the eighteenth resistor and the nineteenth resistor, the voltage division of the seventeenth resistor, the eighteenth resistor and the nineteenth resistor can be adjusted, thereby adjusting the magnitude of the first reference voltage and the second reference voltage.

[0030] In a second aspect, a circuit board assembly is provided. The circuit board assembly includes a first circuit board and a compensation circuit. The first circuit board includes a first power connection line and a feedback signal line. The compensation circuit is located on the first circuit board and is connected to the first power connection line and the feedback signal line. The first power connection line is used to provide a first power supply voltage signal to the compensation circuit; and the feedback signal line is used to provide a second power supply voltage signal to the compensation circuit.

[0031] In some embodiments, the circuit board assembly also includes a power supply circuit, which is located on the first circuit board and connected to the compensation circuit. The power supply circuit is used to provide a reference voltage to the compensation circuit, and the compensation circuit is also used to generate a first reference voltage and a second reference voltage based on the reference voltage.

[0032] In a third aspect, an electronic device is provided, which includes a display panel, a second circuit board, and a circuit board assembly as provided in any of the above embodiments.

[0033] The display panel includes a plurality of power supply voltage lines; the display panel has a first end and a second end opposite to each other in the extending direction of the power supply voltage lines. A circuit board assembly is connected to the first end of the display panel; a first power connection line of the circuit board assembly is connected to the first ends of the plurality of power supply voltage lines. A second circuit board is connected to the second end of the display panel; the second circuit board includes a second power connection line, the second power connection line is connected to the second ends of the plurality of power supply voltage lines, and the second power connection line is also connected to a feedback signal line of the circuit board assembly.

[0034] In some embodiments, the electronic device further includes a main circuit board, a first connection circuit board, and a second connection circuit board. The main circuit board includes a first transmission line. The first connection circuit board connects the circuit board assembly with the main circuit board; the first connection circuit board includes a first connection line. The second connection circuit board connects the second circuit board with the main circuit board, and the second connection circuit board includes a second connection line. The first end of the first connection line is connected to the feedback signal line, and the second end of the first connection line is connected to the first end of the first transmission line; the first end of the second connection line is connected to the second end of the first transmission line, and the second end of the second connection line is connected to the second power connection line.

[0035] In some embodiments, the main circuit board further includes a power supply circuit, a second transmission line, and a third transmission line; the first end of the second transmission line and the first end of the third transmission line are both connected to the power supply circuit. The first connection circuit board further includes a third connection line, the first end of the third connection line is connected to the second end of the second transmission line, and the second end of the third connection line is connected to the first power connection line. The second connection circuit board further includes a fourth connection line, the first end of the fourth connection line is connected to the second end of the third transmission line, and the second end of the fourth connection line is connected to the second power connection line.

[0036] In some embodiments, the display panel further comprises a plurality of data lines, the electronic device further comprises at least one source driver, and the at least one source driver is connected to the plurality of data lines. The compensation circuit of the circuit board assembly is connected to the at least one source driver, and the compensation circuit is used to output the first gamma signal and the second gamma signal to the at least one source driver.

[0037] Among them, the technical effects brought about by any design method in the second aspect and the third aspect can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present application, the following is a brief introduction to the drawings required for use in some embodiments of the present application. Obviously, the drawings described below are only drawings of some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not intended to limit the actual size of the product involved in the embodiments of the present application, the actual process of the method, the actual timing of the signal, etc.

[0039] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of a sub-pixel circuit structure provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of the structure of another electronic device provided in an embodiment of the present application;

[0043] Figure 5 A structural block diagram of a compensation circuit provided in an embodiment of the present application;

[0044] Figure 6 A schematic diagram of a circuit structure of a compensation circuit provided in an embodiment of the present application;

[0045] Figure 7 A structural block diagram of another compensation circuit provided in an embodiment of the present application;

[0046] Figure 8 A schematic diagram of the circuit structure of another compensation circuit provided in an embodiment of the present application;

[0047] Fig. 9 A schematic diagram of a circuit structure of another compensation circuit provided in an embodiment of the present application;

[0048] Fig.10 A schematic diagram of the structure of a circuit board assembly provided in an embodiment of the present application;

[0049] Fig.11 A schematic diagram of the structure of another electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0051] In the following, in the embodiments of the present application, the terms "first", "second", etc. are only used for convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0052] In the embodiments of the present application, "up", "down", "left" and "right" are not limited to being defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms may be relative concepts. They are used for relative description and clarification, and may change accordingly according to changes in the orientation of the components placed in the drawings.

[0053] In the embodiments of the present application, unless the context requires otherwise, throughout the specification and claims, the term "including" is interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "exemplarily" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0054] When describing some embodiments, the expressions "coupled", "connected" and their derivatives may be used. For example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. However, the term "coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0055] An electronic device is provided in an embodiment of the present application. The electronic device is, for example, a consumer electronic product with a display function, a home electronic product, a vehicle-mounted electronic product, or a financial electronic device product. Consumer electronic products include mobile phones, tablet computers, laptop computers, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop displays, smart wearable products (e.g., smart watches, smart bracelets), virtual reality (VR) electronic devices, augmented reality (AR) electronic devices, drones, etc. Home electronic products include smart door locks, televisions, remote controls, refrigerators, rechargeable small household appliances (e.g., soybean milk machines, sweeping robots), etc. Vehicle-mounted electronic products include vehicle-mounted navigation systems, vehicle-mounted high-density digital video discs (DVDs), etc. Financial electronic device products include automated teller machines (ATMs), electronic devices for self-service transactions, etc. The embodiments of the present application do not impose any special restrictions on the specific forms of the above-mentioned electronic devices.

[0056] Figure 1 It is a structural block diagram of an electronic device. Figure 1 As shown, the electronic device 100 may include a display panel 10 , a main circuit board 20 , a first circuit board (ie, a TCON board) 30 , and at least one source driver 40 .

[0057] Figure 2 Schematic diagram of the structure of the display panel 10 provided in the embodiment of the present application. Figure 2 As shown, the display panel 10 includes a plurality of sub pixels P, a plurality of data lines DL and a plurality of power supply voltage lines 11. The plurality of sub pixels P can be divided into a plurality of types. For example, the plurality of sub pixels P can be divided into red sub pixels, blue sub pixels and green sub pixels. For another example, the plurality of sub pixels P can be divided into red sub pixels, blue sub pixels, green sub pixels and white sub pixels, etc.

[0058] Exemplarily, a plurality of sub-pixels P may be arranged in an array, wherein a plurality of sub-pixels P in the same row are arranged along a first direction X, and a plurality of sub-pixels P in the same column are arranged along a second direction Y. The first direction X intersects the second direction Y. For example, the first direction X and the second direction Y may be perpendicular.

[0059] The plurality of data lines DL extend along the second direction Y, and the plurality of sub-pixels P in the same column are connected to the same data line DL. The data line DL is used to transmit a data voltage signal V to the sub-pixels P connected thereto. data The plurality of power supply voltage lines 11 also extend along the second direction Y. One power supply voltage line 11 may connect a plurality of sub-pixels P in one column. Alternatively, one power supply voltage line 11 connects two adjacent columns of sub-pixels P in the first direction X. The power supply voltage line 11 is used to transmit a power supply voltage signal V to the sub-pixels P connected thereto. dd .

[0060] The display panel 10 may further include a plurality of gate lines (not shown), the plurality of gate lines extending along the first direction, and a plurality of sub-pixels P in the same row connected to the same gate line. The gate line is used to transmit a control signal to the sub-pixels P connected thereto, and the control signal is used to control whether the sub-pixels P emit light.

[0061] Figure 3 This is a circuit structure diagram of a sub-pixel P provided in an embodiment of the present application. Figure 3 As shown, the sub-pixel P includes a light-emitting device 101 and a pixel driving circuit 102 connected to each other. The pixel driving circuit 102 is used to provide a driving current I to the light-emitting device 101 to drive the light-emitting device 101 to emit light. Figure 3 The “dashed line with an arrow” indicates the flow direction of the driving current I. The larger the driving current I is, the brighter the light emitting device 101 is.

[0062] Exemplarily, the light-emitting device 101 is an organic light-emitting diode (OLED).

[0063] Exemplarily, the pixel driving circuit 102 includes a first transistor T1 and a second transistor T2. The gate of the first transistor T1 is connected to a gate line for receiving a control signal V gate The first electrode of the first transistor T1 is connected to the data line and is used to receive the data voltage signal V data The second electrode of the first transistor T1 is connected to the gate of the second transistor T2. The first electrode of the second transistor T2 is connected to the power supply voltage line for receiving the power supply voltage signal V dd The second electrode of the second transistor T2 is connected to the input terminal of the light emitting device 101. The output terminal of the light emitting device 101 can be grounded or connected to the low level voltage terminal V ss connected.

[0064] It is understandable that although Figure 3 Only the case where the pixel driving circuit 102 includes two transistors (ie, a first transistor T1 and a second transistor T2 ) is shown, but the circuit structure of the pixel driving circuit 102 in the embodiment of the present application is not limited thereto. Figure 3 Taking the example that the first transistor T1 and the second transistor T2 are both P-type transistors for illustration, the first transistor T1 and the second transistor T2 may also be N-type transistors.

[0065] Exemplarily, the first transistor T1 and the second transistor T2 may both be thin film transistors (TFT).

[0066] During the operation of the sub-pixel P, the first transistor T1 is controlled by the control signal V gate Under the control of the conduction, the data voltage signal V data is transmitted to the gate of the second transistor T2 through the first transistor T1. data Under the control of the data voltage signal V data and the power supply voltage signal V dd Under the action of , a driving current I is generated. The driving current I flows into the light emitting device 101, so that the light emitting device 101 emits light.

[0067] The driving current I satisfies the formula: Wherein, μ is the carrier mobility of the second transistor T2; C ox is the channel capacitance per unit area of ​​the second transistor T2; is the channel width-to-length ratio of the second transistor T2. When the second transistor T2 (P-type transistor) is turned on, the data voltage signal V data The voltage value is less than the power supply voltage signal V dd The voltage value, V data -V dd is a negative value. In this way, the power supply voltage signal V dd The smaller the voltage value, the smaller the drive current I; the power supply voltage signal V dd The larger the voltage value, the larger the driving current I.

[0068] Continue reading Figure 1 The main circuit board 20 includes a power circuit 21, which is a power management integrated circuit (PMIC). The power circuit 21 is connected to multiple power voltage lines of the display panel 10 and is used to provide a power voltage signal V to the multiple power voltage lines 11. dd .

[0069] The main circuit board 20 may also include a system on chip (SoC) 22. The system on chip 22 is a system or product formed by combining multiple integrated circuits with specific functions on a chip, including a complete hardware system and embedded software carried by it. For example, the system on chip may be an application processor (AP). The application processor may generate corresponding timing control signals and display data according to an external signal source.

[0070] The electronic device 100 may include a timing controller (TCON) 31, and a power supply circuit 32 is disposed on the first circuit board 30. The timing controller 31 may receive a plurality of timing control signals and display data from the system-level chip 22 (application processor), convert the plurality of timing control signals into control signals recognizable by the source driver 40, output them to the source driver 40, and convert the display data into data signals and output them to the source driver 40.

[0071] Exemplarily, the electronic device 100 may further include a power supply circuit 32, which is disposed on the first circuit board 30. The power supply circuit 32 may also be a power management integrated circuit. For example, the power supply circuit 32 may be a direct current-direct current converter (DC-DC Converter for short).

[0072] Exemplarily, the timing controller 31 may also be connected to the power supply circuit 32 to control the power supply circuit 32 to generate the gamma signal V GM , the power supply circuit 32 converts the gamma signal V GM The source driver 40 can output the gamma signal V GM Generate data voltage signal V data It can be understood that, when the electronic device 100 includes a plurality of source drivers 40, the gamma signal V GM will be transmitted to each source driver 40 .

[0073] Among them, the gamma signal V GM Includes multiple gamma signals V GM The larger the number, the greater the generated data voltage signal V data The finer the image, the higher the quality of the displayed image. GM It includes a first gamma signal and a second gamma signal, wherein the first gamma signal is a high level signal and the second gamma signal is a low level signal.

[0074] The electronic device 100 may include one or more source drivers 40. The source driver 40 is connected to a plurality of data lines in the display panel 10 and provides a data voltage signal V data In the case where the electronic device 100 includes a plurality of source drivers 40 , the number of the source drivers 40 may be set according to the number of sub-pixels in the display panel 10 . Figure 1 In the example, an electronic device 100 includes four source drivers 40 .

[0075] For example, Figure 1 As shown, the electronic device 100 may further include one or more flexible printed circuits (FPC) 50, and the flexible printed circuit 50 is used to carry the source driver 40. One end of the flexible printed circuit 50 may be connected to one end of the display panel, and the other end of the flexible printed circuit 50 may be connected to one end of the first circuit board 30.

[0076] For example, Figure 1 As shown, the electronic device 100 may include a flexible circuit board 50 and at least one source driver 40, and all source drivers 40 are arranged on one flexible circuit board 50. For another example, the electronic device 100 may include multiple flexible circuit boards 50 and multiple source drivers 40, and at least one source driver 40 is arranged on each flexible circuit board 50.

[0077] The source driver 40 may be disposed on the flexible circuit board 50 by using chip on film (COF) technology.

[0078] For the display panel, the power supply voltage line 11 is relatively long, and the power supply voltage signal V dd A voltage drop will occur on the power supply voltage line 11, resulting in a power supply voltage signal V dd There is a voltage difference, and there is a brightness difference between different sub-pixels P connected to the same power supply voltage line 11. For medium and large-sized display panels, the power supply voltage line 11 is longer, and the brightness difference between different sub-pixels P connected to the same power supply voltage line 11 is also greater.

[0079] Based on this, the embodiment of the present application provides another electronic device 200. Figure 4 A schematic diagram of the structure of another electronic device 200 provided in an embodiment of the present application.

[0080] and Figure 1 The electronic device 100 shown is different. Figure 4The electronic device 200 shown includes a second circuit board 60 , a first connection circuit board 70 and a second connection circuit board 80 in addition to the display panel 10 , the main circuit board 20 , the first circuit board 30 , the source driver 40 and the flexible circuit board 50 .

[0081] like Figure 4 As shown, the display panel 10 has a first end 12 and a second end 13 opposite to each other in the extension direction Y of the power supply voltage line. The first circuit board 30 is connected to the first end 12 of the display panel 10 through the flexible circuit board 50, and the second circuit board 60 is connected to the second end 13 of the display panel 10. The first connecting circuit board 70 connects the main circuit board 20 and the first circuit board 30, and the second connecting circuit board 80 connects the main circuit board 20 and the second circuit board 60.

[0082] Exemplarily, the first connection circuit board 70 and the first circuit board 30 may be connected via a board-to-board (BTB) connector. The first connection circuit board 70 and the main circuit board 20 may be connected via a BTB connector. The second connection circuit board 80 and the main circuit board 20 may be connected via a BTB connector, and the second connection circuit board 80 and the second circuit board 60 may be connected via a BTB connector.

[0083] For example, the flexible circuit board 50 and the display panel 10 may be connected by bonding, and the flexible circuit board 50 and the first circuit board 30 may be connected by bonding. The second circuit board 60 and the display panel 10 may be connected by bonding.

[0084] The first circuit board 30 includes a first power connection line 33, and the second circuit board 60 includes a second power connection line 61. The first power connection line 33 and the second power connection line 61 are both connected to a plurality of power supply voltage lines in the display panel, and provide a first power supply voltage signal and a second power supply voltage signal to both ends of the power supply voltage line, respectively.

[0085] Exemplarily, the main circuit board 20 further includes a second transmission line 23 and a third transmission line 24. The first end a1 of the second transmission line 23 and the first end b1 of the third transmission line 24 are both connected to the power supply circuit 21. The first connection circuit board 70 further includes a third connection line 71, the first end c1 of the third connection line 71 is connected to the second end a2 of the second transmission line 23, and the second end c2 of the third connection line 71 is connected to the first power connection line 33. The second connection circuit board 80 further includes a fourth connection line 81, the first end d1 of the fourth connection line 81 is connected to the second end b2 of the third transmission line 24, and the second end d2 of the fourth connection line 81 is connected to the second power connection line 61.

[0086] The second transmission line 23, the third transmission line 24, the third connection line 71 and the fourth connection line 81 have different line widths, thicknesses and impedances. The second transmission line 23, the third transmission line 24, the third connection line 71 and the fourth connection line 81 may all be made of copper.

[0087] In this way, the power circuit 21 can transmit the first power voltage signal to the first power connection line 33 through the second transmission line 23 and the third connection line 71, thereby transmitting it to the power voltage line in the display panel. The power circuit 21 can transmit the second power voltage signal to the second power connection line 61 through the third transmission line 24 and the fourth connection line 81, thereby transmitting it to the power voltage line of the display panel.

[0088] Since the path that the first power supply voltage signal and the second power supply voltage signal need to pass through when transmitted to the power supply voltage line of the display panel 10 is long, and the current of the first power supply voltage signal and the second power supply voltage signal is large, the voltage drop of the first power supply voltage signal and the second power supply voltage signal is large. In this way, the voltage value of the first power supply voltage signal and the second power supply voltage signal received by the sub-pixel of the display panel is small, the generated driving current is reduced, and the brightness of the sub-pixel is low, which causes the display screen of the display panel 10 to be dark and the display effect is poor. Moreover, for different electronic devices of the same specifications, due to differences in factors such as display panel loading and wiring impedance, there will also be differences between the voltage drops of the first power supply voltage signal and the second power supply voltage signal, which will cause the brightness of the display panels of different electronic devices of the same specifications to be different, and there will be differences in display effects.

[0089] In order to improve the above problems, an embodiment of the present application provides a compensation circuit. Figure 5 This is a structural block diagram of a compensation circuit provided in an embodiment of the present application. Figure 5 As shown, the compensation circuit 300 includes a receiving subcircuit 301 , a first calculating subcircuit 302 and a second calculating subcircuit 303 .

[0090] The receiving subcircuit 301 includes an adding module 310 and a voltage following module 320. The adding module 310 is used to receive the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 The output terminal of the adding module 310 is coupled to the input terminal of the voltage following module 320. The voltage following module 320 is used to output a following voltage signal V g .

[0091] Among them, the following voltage signal V g The voltage value of the first power supply voltage signal V dd1 The voltage value is positively correlated and follows the voltage signal V g The voltage value of the second power supply voltage signal Vdd2 That is, in the first power supply voltage signal V dd1 When the voltage value increases, the following voltage signal V g The voltage value of the second power supply voltage signal V dd2 When the voltage value increases, the following voltage signal V g The voltage value also increases accordingly.

[0092] The first calculation sub-circuit 302 is used to receive the first reference voltage V1 and the following voltage signal V g , output the first gamma signal V GMH The first gamma signal V GMH The voltage value of the first reference voltage V1 and the following voltage signal V g The sum of the voltage values, that is, V GMH =V1+V g The second calculation sub-circuit 303 is used to receive the second reference voltage V2 and the following voltage signal V g , output the second gamma signal V GML The second gamma signal V GML The voltage value of the second reference voltage V2 is the same as the following voltage signal V g The voltage difference, that is, V GML =V g -V2.

[0093] It is understandable that the values ​​of the first reference voltage V1 and the second reference voltage V2 can be designed according to actual needs. For example, the first reference voltage V1 can be greater than the second reference voltage V2.

[0094] Exemplarily, the first gamma signal V GMH is a high level signal, the second gamma signal V GML It is a low level signal.

[0095] The compensation circuit 300 provided in the embodiment of the present application first generates a first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 , using the addition module 310 and the voltage following module 320 to generate a following voltage signal V g , and then based on the following voltage signal V g , using the first calculation sub-circuit 302 and the second calculation sub-circuit 303 to generate a first gamma signal V GMH and the second gamma signal V GML The first gamma signal V GMH The voltage value of the first reference voltage V1 and the following voltage signal V g The sum of the voltage values ​​of the first gamma signal V GMH The first power supply voltage signal Vdd1 The voltage value of the second power supply voltage signal V dd2 The voltage value of the second gamma signal V GML The second reference voltage V2 and the following voltage signal V g The voltage difference between the second gamma signal V GML The first power supply voltage signal V dd1 The voltage value of the second power supply voltage signal V dd2 Voltage value.

[0096] When the compensation circuit provided in the embodiment of the present application is applied to an electronic device, the output end of the compensation circuit 300 (that is, the output end of the first calculation subcircuit and the output end of the second calculation subcircuit) can be connected to the input end of the source driver to convert the first gamma signal V GMH and the second gamma signal V GML The source driver generates a first gamma signal V GMH and the second gamma signal V GML Capable of generating a data voltage signal V data In this way, the data voltage signal V data The first power supply voltage signal V dd1 The voltage value of the second power supply voltage signal V dd2 The voltage value is compensated.

[0097] It can be understood that, when the electronic device includes a plurality of source drivers, the first gamma signal V GMH and the second gamma signal V GML should be transmitted to all source drivers of the electronic device to ensure that the data voltage signal V output by different source drivers is data The first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 The degree of compensation is the same.

[0098] The data voltage signal V data After being input into the pixel driving circuit, the pixel circuit data , the first power supply voltage signal V dd1 , the second power supply voltage signal V dd2 Generates driving current due to the data voltage signal V data The first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 The voltage value of the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2The voltage drop of the first power supply voltage signal V dd1 The voltage drop and the second power supply voltage signal V dd2 The voltage drop compensation can improve the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 There is a problem that the driving current is small due to the voltage drop, the brightness of the display panel is darker, and the display effect is poor.

[0099] For different electronic devices with the same specifications, the first power supply voltage signal V dd1 The voltage drop and the second power supply voltage signal V dd2 The voltage drop of the first power supply voltage signal V may vary due to factors such as display panel loading and wiring impedance, resulting in brightness differences between display panels of electronic devices with the same specifications. dd1 The voltage drop and the second power supply voltage signal V dd2 The voltage drop of the first power supply voltage signal V can be compensated, thereby improving or even solving the problem of the first power supply voltage signal V in different electronic devices with the same specifications. dd1 and the second power supply voltage signal V dd2 The different voltage drops cause the brightness difference between display panels.

[0100] In some embodiments, the following voltage signal V g The voltage value is the sum of the first product and the second product, and the first product is the first power supply voltage signal V dd1 The product of the voltage value and the first coefficient, the second product is the second power supply voltage signal V dd2 The product of the voltage value and the second coefficient. Wherein, the first coefficient and the second coefficient are both greater than or equal to 0, and the first coefficient and the second coefficient are not 0 at the same time.

[0101] The embodiment of the present application can adjust the value of the first coefficient and the value of the second coefficient to adjust the following voltage signal V g The first power supply voltage signal V dd1 The weight and second power supply voltage signal V dd2 The weight of the first gamma signal V GMH The voltage value of the first reference voltage V1 and the following voltage signal V g The sum of the voltage values ​​of the following voltage signal V g The first power supply voltage signal V dd1 The weight and second power supply voltage signal V dd2 The weight of the first gamma signal V GMH The first power supply voltage signal V dd1 The weight and second power supply voltage signal V dd2 The second gamma signal VGML The second reference voltage V2 and the following voltage signal V g The voltage value difference is adjusted to follow the voltage signal V g The first power supply voltage signal V dd1 The weight and second power supply voltage signal V dd2 The weight can affect the second gamma signal V GML The first power supply voltage signal V dd1 The weight and second power supply voltage signal V dd2 The weight of .

[0102] Since the data voltage signal V data According to the first gamma signal V GMH and the second gamma signal V GML Therefore, adjusting the value of the first coefficient and the value of the second coefficient can affect the data voltage signal V data The first power supply voltage signal V dd1 The weight and second power supply voltage signal V dd2 The weight of the data voltage signal V data The first power supply voltage signal V dd1 The compensation strength and the second power supply voltage signal V dd2 compensation strength.

[0103] In this way, the compensation circuit 300 can be adapted to different electronic devices, thereby improving the applicability of the compensation circuit 300. Meanwhile, for a single electronic device, a first power supply voltage signal V dd1 The compensation strength and the second power supply voltage signal V dd2 The first coefficient and the second coefficient of the compensation strength can also be determined in the first power supply voltage signal V dd1 The voltage drop and the second power supply voltage signal V dd2 When the voltage drop is different, the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 Compensation is performed to improve the compensation effect, thereby further improving the display effect of the display panel.

[0104] For example, in the first power supply voltage signal V dd1 The voltage drop is greater than the second power supply voltage signal V dd2 When the voltage drop is greater than , the first coefficient can be made greater than the second coefficient, so that the following voltage signal V g The first power supply voltage signal V dd1 The weight is larger, following the voltage signal V g The second power supply voltage signal V dd2 The weight of the data voltage signal V dataThe first power supply voltage signal V dd1 The compensation strength is relatively large, and the data voltage signal V data The second power supply voltage signal V dd2 The compensation is relatively small.

[0105] For another example, when the first power supply voltage signal V dd1 The voltage drop is less than the second power supply voltage signal V dd2 When the voltage drop is small, the first coefficient can be made smaller than the second coefficient, so that the following voltage signal V g The first power supply voltage signal V dd1 The weight is small and follows the voltage signal V g The second power supply voltage signal V dd2 The weight of the data voltage signal V data The first power supply voltage signal V dd1 The compensation strength is small, and the data voltage signal V data The second power supply voltage signal V dd2 The compensation is greater.

[0106] For example, in the first power supply voltage signal V dd1 The voltage drop is equal to the second power supply voltage signal V dd2 When the voltage drop of the first power supply voltage signal V dd1 The voltage drop of the second power supply voltage signal V dd2 When the pressure drop difference is small, the first coefficient can be made equal to the second coefficient.

[0107] For another example, when the first power supply voltage signal V dd1 When the voltage drop of the second power supply voltage signal V dd2 When the pressure drop is small, the second coefficient can be 0.

[0108] It can be understood that the above example is from the first power supply voltage signal V dd1 The voltage drop and the second power supply voltage signal V dd2 The first coefficient and the second coefficient are designed by considering the voltage drop of the first power supply signal V. In practical applications, more factors can be considered to design the first coefficient and the second coefficient. dd1 The voltage drop is greater than the second power supply voltage signal V dd2 When the pressure drop is small, the first coefficient may also be equal to or less than the second coefficient.

[0109] Exemplarily, the first coefficient and the second coefficient may both be 0.5.

[0110] Figure 6 Schematic diagram of the circuit structure of the compensation circuit provided in the embodiment of the present application. Figure 6 As shown, the adding module 310 may include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a first operational amplifier OP1.

[0111] The first end of the first resistor R1 is used to receive the first power supply voltage signal V dd1 The first end of the second resistor R2 is used to receive the second power supply voltage signal V dd2 , the second end of the first resistor R1 and the second end of the second resistor R2 are both connected to the non-inverting input terminal of the first operational amplifier OP1. The first end of the third resistor R3 is connected to the ground terminal GND, and the second end of the third resistor R3 is connected to the inverting input terminal of the first operational amplifier OP1. The first end of the fourth resistor R4 is connected to the inverting input terminal of the first operational amplifier OP1, and the second end of the fourth resistor R4 and the output terminal of the first operational amplifier OP1 are both coupled to the input terminal of the voltage follower module 320.

[0112] Exemplarily, the resistance of the first resistor R1 is r1, the resistance of the second resistor R2 is r2, the resistance of the third resistor R3 is r3, and the resistance of the fourth resistor R4 is r4, then r1, r2, r3, and r4 satisfy the formula: in, is the first coefficient, is the second coefficient.

[0113] The first coefficient and the second coefficient can be adjusted by adjusting the resistance values ​​of the first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 .

[0114] It is understandable that, in addition to the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4, the adding module 310 may also include other resistors and capacitors. In the case where the adding module includes other resistors, the relationship between the resistance value of the resistor and the first coefficient and the second coefficient may be recalculated according to the properties of the operational amplifier (virtual short and virtual open).

[0115] In some embodiments, the voltage follower module 320 includes a voltage follower OP2, wherein a first input terminal (non-inverting input terminal) of the voltage follower OP2 is connected to an output terminal of the adding module 310, and a second input terminal (inverting output terminal) of the voltage follower OP2 is coupled to an output terminal of the voltage follower OP2. The output terminal of the voltage follower OP2 is connected to an input terminal of the first calculation subcircuit 302 and an input terminal of the second calculation subcircuit 303. The voltage follower OP2 is used to receive a following voltage signal V output by the adding module 310. g and outputs a following voltage signal V to the first calculation sub-circuit 302 and the second calculation sub-circuit 303 g .

[0116] When the adding module 310 includes the first resistor R1 , the second resistor R2 , the third resistor R3 , the fourth resistor R4 and the first operational amplifier OP1 , the output end of the adding module 310 is also the output end of the first operational amplifier OP1 .

[0117] By setting the voltage follower OP2, the adding module 310 can be isolated from the first calculating sub-circuit 302 and the second calculating sub-circuit 303, thereby preventing the first calculating sub-circuit 302 and the second calculating sub-circuit 303 from affecting the signal operation of the adding module 310.

[0118] In the embodiment of the present application, the adding module 310 and the voltage following module 320 are both analog circuits, and the following voltage signal V output by the receiving sub-circuit 301 is g As an analog signal, the analog signal has the characteristics of precise resolution and easy processing, so it is used to follow the voltage signal V g Generate a first gamma signal V GMH and the second gamma signal V GML When the first gamma signal V GMH and the second gamma signal V GML The accuracy of the compensation circuit 300 is guaranteed to be dd1 The voltage drop and the second power supply voltage signal V dd2 The compensation effect of the voltage drop.

[0119] In some embodiments, continue to refer to Figure 6 The first calculation sub-circuit 302 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a third operational amplifier OP3.

[0120] The first end of the fifth resistor R5 is used to receive the first reference voltage V1, and the first end of the sixth resistor R6 is used to receive the following voltage signal V g The second end of the fifth resistor R5 and the second end of the sixth resistor R6 are both connected to the non-inverting input terminal of the third operational amplifier OP3. The first end of the seventh resistor R7 is connected to the ground terminal GND, and the second end of the seventh resistor R7 is connected to the inverting input terminal of the third operational amplifier OP3. The first end of the eighth resistor R8 is connected to the inverting input terminal of the third operational amplifier OP3, and the second end of the eighth resistor R8 is connected to the output terminal of the third operational amplifier OP3.

[0121] The resistance value of the fifth resistor R5 is the same as the resistance value of the sixth resistor R6, and the resistance value of the seventh resistor R7 is the same as the resistance value of the eighth resistor R8. GMHThe first reference voltage V1 and the following voltage signal V g The sum of the voltage values.

[0122] In the embodiment of the present application, the first calculation subcircuit 302 is an analog circuit, and the first gamma signal V output by the first calculation subcircuit 302 GMH The analog signal has the characteristics of precise resolution and easy processing. GMH When generating the data voltage signal, it is beneficial to improve the accuracy of the data voltage signal, thereby improving the data voltage signal's response to the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 Compensation accuracy.

[0123] In some examples, a component (e.g., a resistor, a capacitor, etc.) may be connected in series at the output end of the third operational amplifier OP3, and the component may serve as a load of the third operational amplifier OP3. By adjusting the load parameter of the third operational amplifier OP3, the first gamma signal V may be generated for the first calculation subcircuit 302. GMH The speed of the compensation circuit 300 is adjusted to adjust the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 compensation speed.

[0124] In some embodiments, Figure 6 As shown, the second calculation sub-circuit 303 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12 and a fourth operational amplifier OP4.

[0125] The first end of the ninth resistor R9 is used to receive the following voltage signal V g , a first end of the tenth resistor R10 is connected to the ground terminal GND, a second end of the ninth resistor R9 and a second end of the tenth resistor R10 are both connected to the non-inverting input terminal of the fourth operational amplifier OP4. A first end of the eleventh resistor R11 is used to receive the second reference voltage V2, and a second end of the eleventh resistor R11 is connected to the inverting input terminal of the fourth operational amplifier OP4. A first end of the twelfth resistor R12 is connected to the inverting input terminal of the fourth operational amplifier OP4, and a second end of the twelfth resistor R12 is connected to the output terminal of the fourth operational amplifier OP4.

[0126] The resistance of the ninth resistor R9 is the same as the resistance of the tenth resistor R10, and the resistance of the eleventh resistor R11 is the same as the resistance of the twelfth resistor R12. GML The second reference voltage V2 and the following voltage signal V g The voltage difference.

[0127] In the embodiment of the present application, the second calculation subcircuit 303 is an analog circuit, and the second gamma signal V output by the second calculation subcircuit 303 is GML The analog signal has the characteristics of precise resolution and easy processing. GML When generating the data voltage signal, it is beneficial to improve the accuracy of the data voltage signal, thereby improving the data voltage signal's response to the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 Compensation accuracy.

[0128] In some examples, a component (e.g., a resistor, a capacitor, etc.) may be connected in series at the output end of the fourth operational amplifier OP4, and the component may serve as a load of the fourth operational amplifier OP4. By adjusting the load parameter of the fourth operational amplifier OP4, the second calculation subcircuit 303 may generate a second gamma signal V GML The speed of the compensation circuit 300 is adjusted to adjust the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 compensation speed.

[0129] Figure 7 FIG. 3 is a block diagram of another compensation circuit 300 provided in an embodiment of the present application. In some embodiments, Figure 7 As shown, the compensation circuit 300 further includes a generating subcircuit 304, and the input end of the first calculating subcircuit 302 and the input end of the second calculating subcircuit 303 are both connected to the output end of the generating subcircuit 304. The generating subcircuit 304 is used to output the first reference voltage V1 to the first calculating subcircuit 302 and output the second reference voltage V2 to the second calculating subcircuit 303.

[0130] In some examples, such as Figure 7 As shown, the generating subcircuit 304 includes a first voltage dividing unit 330 and a second voltage dividing unit 340. The input end of the first voltage dividing unit 330 is used to receive the reference voltage V0, and the output end of the first voltage dividing unit 330 outputs the first reference voltage V1. The input end of the second voltage dividing unit 340 is used to receive the reference voltage V0, and the output end of the second voltage dividing unit 340 outputs the second reference voltage V2.

[0131] Figure 8 FIG. 3 is a circuit diagram of another compensation circuit 300 provided in an embodiment of the present application. For example, Figure 8As shown, the first voltage dividing unit 330 includes a thirteenth resistor R13 and a fourteenth resistor R14 connected to each other, and a first end of the thirteenth resistor R13 is used to receive a reference voltage V0. A second end of the thirteenth resistor R13 is connected to a first end of the fourteenth resistor R14, and a second end of the fourteenth resistor R14 is connected to a ground terminal GND. The second end of the thirteenth resistor R13 and the first end of the fourteenth resistor R14 are both coupled to the input end of the first calculation sub-circuit 302.

[0132] In the embodiment of the present application, the thirteenth resistor R13 and the fourteenth resistor R14 are used to form a voltage divider circuit, so as to generate the first reference voltage V1 using the reference voltage V0. The voltage value of the first reference voltage V1 is less than the voltage value of the reference voltage V0. The resistance value of the thirteenth resistor R13 and the resistance value of the fourteenth resistor R14 can be adjusted according to the magnitude of the reference voltage V0 and the first reference voltage V1.

[0133] For example, Figure 8 As shown, the second voltage dividing unit 340 includes a fifteenth resistor R15 and a sixteenth resistor R16 connected to each other, a first end of the fifteenth resistor R15 is used to receive the reference voltage V0, a ​​second end of the fifteenth resistor R15 is connected to a first end of the sixteenth resistor R16, and a second end of the sixteenth resistor R16 is connected to a ground terminal GND. The second end of the fifteenth resistor R15 and the first end of the sixteenth resistor R16 are both coupled to the input end of the second calculation sub-circuit 303.

[0134] In the embodiment of the present application, the fifteenth resistor R15 and the sixteenth resistor R16 are used to form a voltage divider circuit, so as to generate a second reference voltage V2 using the reference voltage V0. The voltage value of the second reference voltage V2 is less than the voltage value of the reference voltage V0. The resistance value of the fifteenth resistor R15 and the resistance value of the sixteenth resistor R16 can be adjusted according to the magnitude of the reference voltage V0 and the second reference voltage V2.

[0135] Fig. 9 A schematic diagram of the circuit structure of another compensation circuit provided in an embodiment of the present application. In other examples, such as Fig. 9 As shown, the generating subcircuit 304 includes a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. A first end of the seventeenth resistor R17 is used to receive a reference voltage V0, a ​​second end of the seventeenth resistor R17 is connected to a first end of the eighteenth resistor R18, a second end of the eighteenth resistor R18 is connected to a first end of the nineteenth resistor R19, and a second end of the nineteenth resistor R19 is connected to a ground terminal GND.

[0136] The second end of the seventeenth resistor R17 and the first end of the eighteenth resistor R18 are both coupled to the input end of the first calculation subcircuit 302. The second end of the eighteenth resistor R18 and the first end of the nineteenth resistor R19 are both coupled to the input end of the second calculation subcircuit 303.

[0137] The second end of the seventeenth resistor R17 (the first end of the eighteenth resistor R18) is used to output the first reference voltage V1, and the second end of the eighteenth resistor R18 (the first end of the nineteenth resistor R19) is used to output the second reference voltage V2.

[0138] In the embodiment of the present application, the seventeenth resistor R17, the eighteenth resistor R18 and the nineteenth resistor R19 are used to form a voltage divider circuit, so that the node voltage between the seventeenth resistor R17 and the eighteenth resistor R18 (that is, the first reference voltage V1) is less than the reference voltage V0, and the node voltage between the eighteenth resistor R18 and the nineteenth resistor R19 (that is, the second reference voltage V2) is less than the reference voltage V0. By adjusting the resistance values ​​of the seventeenth resistor R17, the eighteenth resistor R18 and the nineteenth resistor R19, the voltage division of the seventeenth resistor R17, the eighteenth resistor R18 and the nineteenth resistor R19 can be adjusted, thereby adjusting the magnitude of the first reference voltage V1 and the second reference voltage V2.

[0139] In some further examples, the generating subcircuit 304 may include two voltage sources, where the two voltage sources are respectively configured to provide a first reference voltage and a second reference voltage.

[0140] It can be seen from the above embodiments that the compensation circuit 300 provided in the embodiment of the present application adopts analog circuit elements. When the compensation circuit 300 receives the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 After that, the first gamma signal V can be automatically generated GMH and the second gamma signal V GML , and the first gamma signal V GMH and the second gamma signal V GML Transmitted to the source driver to achieve automatic voltage compensation (AVC).

[0141] The compensation circuit 300 is based on the first power supply voltage signal V dd1 and the second power supply voltage signal V dd2 Generate a first gamma signal V GMH and the second gamma signal V GML The speed can be faster, the first gamma signal V GMH and the second gamma signal V GML With the first power supply voltage signal Vdd1 and the second power supply voltage signal V dd2 The change speed of the first power supply voltage signal V dd1 The voltage drop of the second power supply voltage signal V dd2 When the compensation circuit 300 is applied to an electronic device, the compensation speed of the compensation circuit 300 is relatively fast, which is beneficial to improving the display effect of the display panel.

[0142] Compared with the solution in the related art of compensating the voltage drop of each sub-pixel in the display panel through digital circuits such as sampling circuits and processors, the embodiment of the present application does not need to add digital circuits such as sampling circuits and processors, and can also save costs.

[0143] The present application also provides a circuit board assembly 400. Fig.10 Schematic diagram of the structure of the circuit board assembly 400 provided in the embodiment of the present application. Fig.10 As shown, the circuit board assembly 400 includes a first circuit board 30 and a compensation circuit 300 .

[0144] The first circuit board 30 includes a first power connection line 33 and a feedback signal line 34. The compensation circuit 300 is located on the first circuit board 30 and is connected to the first power connection line 33 and the feedback signal line 34. The first power connection line 33 is used to provide a first power supply voltage signal V to the compensation circuit 300. dd1 The feedback signal line 34 is used to provide the second power supply voltage signal V to the compensation circuit 300. dd2 .

[0145] The first power connection line 33 can be connected to the first input terminal of the receiving sub-circuit 301 in the compensation circuit 300 to provide the first power supply voltage signal V dd1 The feedback signal line 34 can be connected to the second input terminal of the receiving sub-circuit 301 in the compensation circuit 300 to provide the receiving sub-circuit 301 with a second power supply voltage signal V dd2 .

[0146] Exemplarily, the material of the first power connection line 33 and the material of the feedback signal line 34 may be the same. For example, the material of the first power connection line 33 and the material of the feedback signal line 34 may both include copper. It is understood that the line width of the first power connection line 33 may be the same as or different from the line width of the feedback signal line 34. The thickness of the first power connection line 33 may be the same as or different from the thickness of the feedback signal line 34.

[0147] In some embodiments, the circuit board assembly 400 also includes a power supply circuit 32, which is located on the first circuit board 30 and is connected to the compensation circuit 300. The power supply circuit 32 is used to provide a reference voltage V0 to the compensation circuit 300, and the compensation circuit 300 is also used to generate a first reference voltage V1 and a second reference voltage V2 based on the reference voltage V0.

[0148] like Fig.10 As shown, the compensation circuit 300 may include a generating subcircuit 304, and the input end of the generating subcircuit 304 is connected to the output end of the power supply circuit 32. The first output end of the generating subcircuit 304 is connected to the input end of the first calculating subcircuit 302, and the second output end of the generating subcircuit 304 is connected to the input end of the second calculating subcircuit 303. The generating subcircuit 304 can generate a first reference voltage V1 and a second reference voltage V2 according to the reference voltage V0, and output the first reference voltage V1 to the first calculating subcircuit 302, and output the second reference voltage V2 to the second calculating subcircuit 303.

[0149] In the embodiment of the present application, the power supply circuit 32 is used to provide the reference voltage V0, so there is no need to introduce an additional voltage source, which is beneficial to simplifying the structure of the circuit board assembly 400 and reducing costs.

[0150] In some embodiments, continue to refer to Fig.10 The circuit board assembly 400 further includes a timing controller 31. The timing controller 31 is connected to the power supply circuit 32 and is used to control the power supply circuit 32 to provide a reference voltage V0 to the compensation circuit 300.

[0151] Fig.11 A structural diagram of another electronic device 500 is provided for an embodiment of the present application. Fig.11 As shown, the electronic device 500 includes a display panel 10, a second circuit board 60 and the circuit board assembly 400 provided in the above embodiment.

[0152] The circuit board assembly 400 includes a compensation circuit 300 and a first circuit board 30 , and the compensation circuit 300 is disposed on the first circuit board 30 .

[0153] Reference Figure 2 The display panel 10 includes a plurality of power supply voltage lines 11, and the plurality of power supply voltage lines 11 extend along the second direction Y. Fig.11 The display panel 10 has a first end 12 and a second end 13 which are opposite to each other in the extending direction of the power supply voltage line 11 (ie, the second direction Y).

[0154] The circuit board assembly 400 is connected to the first end 12 of the display panel 10. The first power connection line 33 of the circuit board assembly 400 is connected to the first ends of the plurality of power voltage lines.

[0155] The second circuit board 60 is connected to the second end 13 of the display panel 10. The second circuit board 60 includes a second power connection line 61 connected to the second ends of the plurality of power supply voltage lines and connected to the feedback signal line 34 of the circuit board assembly 400.

[0156] In the electronic device 500 provided in the embodiment of the present application, the first power connection line 33 in the circuit board assembly 400 is not only connected to the first end of the power supply voltage line in the display panel 10, but also connected to the compensation circuit 300. The first power connection line 33 can transmit the first power supply voltage signal to be transmitted to the power supply voltage line to the compensation circuit 300, so that the compensation circuit 300 receives the first power supply voltage signal after the voltage drop. The second power connection line 61 is not only connected to the second end of the power supply voltage line in the display panel 10, but also connected to the feedback signal line 34 in the circuit board assembly 400. The second power connection line 61 can transmit the second power supply voltage signal to be transmitted to the power supply voltage line to the compensation circuit 300, so that the compensation circuit 300 receives the second power supply voltage signal after the voltage drop.

[0157] In this way, the first gamma signal and the second gamma signal generated by the compensation circuit 300 compensate for the first power supply voltage signal after the voltage drop and the second power supply voltage signal after the voltage drop, and the data voltage signal generated by the source driver according to the first gamma signal and the second gamma signal also compensates for the first power supply voltage signal after the voltage drop and the second power supply voltage signal after the voltage drop. After the sub-pixel in the display panel receives the first power supply voltage signal after the voltage drop and the second power supply voltage signal after the voltage drop, since the voltage drop of the first power supply voltage signal and the second power supply voltage signal is compensated in the data voltage signal, the influence of the voltage drop of the first power supply voltage signal and the second power supply voltage signal on the driving current can be eliminated, thereby ensuring the display brightness of the display panel.

[0158] It is understandable that, in addition to the display panel 10, the second circuit board 60 and the circuit board assembly 400 provided in the above embodiment, the electronic device 500 further includes a main circuit board 20, a source driver 40, a flexible circuit board 50, a first connection circuit board 70 and a second connection circuit board 80. The description of the main circuit board 20, the source driver 40, the flexible circuit board 50, the first connection circuit board 70 and the second connection circuit board 80 can refer to the above embodiment, and will not be repeated here.

[0159] The difference from the electronic device 200 provided in the previous embodiment is that, in order to realize the connection between the second power connection line 61 and the feedback signal line 34, as shown in FIG. Fig.11As shown, the main circuit board 20 includes a first transmission line 25 , the first connection circuit board 70 includes a first connection line 72 , and the second connection circuit board 80 includes a second connection line 82 .

[0160] It is understandable that although Fig.11 Different traces on the same circuit board (eg, a main circuit board, a first circuit board, a first connection circuit board, and a second connection circuit board) use the same line type, but different traces on the same circuit board have different functions, and their line width, thickness, and impedance may also be different.

[0161] The first end f1 of the first connection line 72 is connected to the feedback signal line 34, and the second end f2 of the first connection line 72 is connected to the first end e1 of the first transmission line 25. The first end g1 of the second connection line 82 is connected to the second end e2 of the first transmission line 25, and the second end g2 of the second connection line 82 is connected to the second power connection line 61.

[0162] The second power connection line 61 can be connected to the feedback signal line 34 via the first transmission line 25 , the first connection line 72 and the second connection line 82 , so that the feedback signal line 34 can collect the second power supply voltage signal on the second power connection line 61 .

[0163] Exemplarily, the line width of the first transmission line 25 is different from the line width of the first connection line 72, and the line width of the first transmission line 25 is also different from the line width of the second connection line 82. The thickness of the first transmission line 25 is different from the thickness of the first connection line 72, and the thickness of the first transmission line 25 is also different from the thickness of the second connection line 82.

[0164] Exemplarily, the material of the first transmission line 25 , the material of the first connection line 72 , and the material of the second connection line 82 may all be copper.

[0165] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0166] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A compensation circuit, characterized in that: include: The receiving subcircuit comprises an adding module and a voltage following module, wherein the adding module is used to receive a first power supply voltage signal and a second power supply voltage signal, and an output terminal of the adding module is coupled to an input terminal of the voltage following module; and the voltage following module is used to output a following voltage signal; A first calculation subcircuit is configured to receive a first reference voltage and the following voltage signal, and output a first gamma signal; the voltage value of the first gamma signal is the sum of the voltage values ​​of the first reference voltage and the following voltage signal; The second calculation subcircuit is used to receive a second reference voltage and the following voltage signal, and output a second gamma signal; the voltage value of the second gamma signal is the difference between the second reference voltage and the voltage value of the following voltage signal.

2. The compensation circuit according to claim 1, characterized in that: The adding module includes a first resistor, a second resistor, a third resistor, a fourth resistor and a first operational amplifier; The first end of the first resistor is used to receive the first power supply voltage signal, the first end of the second resistor is used to receive the second power supply voltage signal, and the second end of the first resistor and the second end of the second resistor are both connected to the non-inverting input end of the first operational amplifier; A first end of the third resistor is connected to the ground terminal, and a second end of the third resistor is connected to the inverting input terminal of the first operational amplifier; The first end of the fourth resistor is connected to the inverting input end of the first operational amplifier, and the second end of the fourth resistor and the output end of the first operational amplifier are both coupled to the input end of the voltage follower module.

3. The compensation circuit according to claim 1 or 2, characterized in that: The voltage follower module comprises a voltage follower, a first input end of the voltage follower is connected to the output end of the adding module, a second input end of the voltage follower is coupled to the output end of the voltage follower; the output end of the voltage follower is connected to the input end of the first calculation subcircuit and the input end of the second calculation subcircuit; The voltage follower is used to receive the follow voltage signal output by the adding module, and output the follow voltage signal to the first calculation sub-circuit and the second calculation sub-circuit.

4. The compensation circuit according to any one of claims 1 to 3, characterized in that: The voltage value of the follower voltage signal is the sum of a first product and a second product, the first product is the product of the voltage value of the first power supply voltage signal and a first coefficient, and the second product is the product of the voltage value of the second power supply voltage signal and a second coefficient; The first coefficient and the second coefficient are both greater than or equal to 0, and the first coefficient and the second coefficient are not 0 at the same time.

5. The compensation circuit according to any one of claims 1 to 4, characterized in that: The first calculation subcircuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a third operational amplifier; The first end of the fifth resistor is used to receive the first reference voltage, and the first end of the sixth resistor is used to receive the follow voltage signal; the second end of the fifth resistor and the second end of the sixth resistor are both connected to the non-inverting input end of the third operational amplifier; The first end of the seventh resistor is connected to the ground end, and the second end of the seventh resistor is connected to the inverting input end of the third operational amplifier; The first end of the eighth resistor is connected to the inverting input end of the third operational amplifier and the second end of the seventh resistor, and the second end of the eighth resistor is connected to the output end of the third operational amplifier; The fifth resistor has the same resistance value as the sixth resistor, and the seventh resistor has the same resistance value as the eighth resistor.

6. The compensation circuit according to any one of claims 1 to 5, characterized in that: The second calculation subcircuit includes a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a fourth operational amplifier; The first end of the ninth resistor is used to receive the follow voltage signal, the first end of the tenth resistor is connected to the ground terminal, and the second end of the ninth resistor and the second end of the tenth resistor are both connected to the non-inverting input terminal of the fourth operational amplifier; The first end of the eleventh resistor is used to receive the second reference voltage, and the second end of the eleventh resistor is connected to the inverting input end of the fourth operational amplifier; The first end of the twelfth resistor is connected to the inverting input end of the fourth operational amplifier and the second end of the eleventh resistor, and the second end of the twelfth resistor is connected to the output end of the fourth operational amplifier; The ninth resistor has the same resistance value as the tenth resistor, and the eleventh resistor has the same resistance value as the twelfth resistor.

7. The compensation circuit according to any one of claims 1 to 6, characterized in that: The compensation circuit also includes a generating subcircuit, wherein the input end of the first calculating subcircuit and the input end of the second calculating subcircuit are both connected to the output end of the generating subcircuit; the generating subcircuit is used to output the first reference voltage to the first calculating subcircuit and output the second reference voltage to the second calculating subcircuit.

8. The compensation circuit according to claim 7, characterized in that: The generating subcircuit comprises a first voltage dividing unit and a second voltage dividing unit; The input end of the first voltage dividing unit is used to receive the reference voltage, and the output end of the first voltage dividing unit outputs the first reference voltage; The input end of the second voltage dividing unit is used to receive the reference voltage, and the output end of the second voltage dividing unit outputs the second reference voltage.

9. The compensation circuit according to claim 8, characterized in that: The first voltage dividing unit includes a thirteenth resistor and a fourteenth resistor connected to each other, a first end of the thirteenth resistor is used to receive the reference voltage; a second end of the thirteenth resistor is connected to the first end of the fourteenth resistor, and a second end of the fourteenth resistor is connected to a ground end; the second end of the thirteenth resistor and the first end of the fourteenth resistor are both coupled to an input end of the first calculation subcircuit; The second voltage-dividing unit includes a fifteenth resistor and a sixteenth resistor connected to each other, the first end of the fifteenth resistor is used to receive the reference voltage, the second end of the fifteenth resistor is connected to the first end of the sixteenth resistor, and the second end of the sixteenth resistor is connected to the ground end; the second end of the fifteenth resistor and the first end of the sixteenth resistor are both coupled to the input end of the second calculation sub-circuit.

10. The compensation circuit according to claim 7, characterized in that: The generating sub-circuit includes a seventeenth resistor, an eighteenth resistor and a nineteenth resistor; The first end of the seventeenth resistor is used to receive the reference voltage, the second end of the seventeenth resistor is connected to the first end of the eighteenth resistor, the second end of the eighteenth resistor is connected to the first end of the nineteenth resistor, and the second end of the nineteenth resistor is connected to the ground end; The second end of the seventeenth resistor and the first end of the eighteenth resistor are both coupled to the input end of the first calculation sub-circuit; The second end of the eighteenth resistor and the first end of the nineteenth resistor are both coupled to the input end of the second calculation sub-circuit.

11. A circuit board assembly, characterized in that: include: A first circuit board, comprising a first power connection line and a feedback signal line; The compensation circuit according to any one of claims 1 to 10; the compensation circuit is located on the first circuit board and is connected to the first power connection line and the feedback signal line; The first power connection line is used to provide a first power voltage signal to the compensation circuit; and the feedback signal line is used to provide a second power voltage signal to the compensation circuit.

12. The circuit board assembly according to claim 11, characterized in that: The circuit board assembly further comprises: A power supply circuit is located on the first circuit board and connected to the compensation circuit. The power supply circuit is used to provide a reference voltage to the compensation circuit. The compensation circuit is also used to generate a first reference voltage and a second reference voltage according to the reference voltage.

13. An electronic device, characterized in that: include: The display panel comprises a plurality of power supply voltage lines; the display panel has a first end and a second end opposite to each other in an extending direction of the power supply voltage lines; The circuit board assembly according to claim 11 or 12, connected to a first end of the display panel; a first power connection line of the circuit board assembly is connected to a first end of the plurality of power supply voltage lines; A second circuit board is connected to the second end of the display panel; the second circuit board includes a second power connection line, the second power connection line is connected to the second ends of the multiple power voltage lines, and the second power connection line is also connected to the feedback signal line of the circuit board assembly.

14. The electronic device according to claim 13, characterized in that: Also includes: A main circuit board including a first transmission line; A first connecting circuit board, connecting the circuit board assembly and the main circuit board; the first connecting circuit board includes a first connecting line; a second connecting circuit board, connecting the second circuit board with the main circuit board, wherein the second connecting circuit board comprises a second connecting line; Among them, the first end of the first connecting line is connected to the feedback signal line, and the second end of the first connecting line is connected to the first end of the first transmission line; the first end of the second connecting line is connected to the second end of the first transmission line, and the second end of the second connecting line is connected to the second power supply connecting line.

15. The electronic device according to claim 14, characterized in that: The main circuit board also includes a power supply circuit, a second transmission line and a third transmission line; the first end of the second transmission line and the first end of the third transmission line are both connected to the power supply circuit; The first connection circuit board further includes a third connection line, a first end of the third connection line is connected to the second end of the second transmission line, and a second end of the third connection line is connected to the first power connection line; The second connection circuit board further includes a fourth connection line, a first end of the fourth connection line is connected to the second end of the third transmission line, and a second end of the fourth connection line is connected to the second power connection line.

16. The electronic device according to any one of claims 13 to 15, characterized in that: The display panel further comprises a plurality of data lines, and the electronic device further comprises at least one source driver, wherein the at least one source driver is connected to the plurality of data lines; The compensation circuit of the circuit board assembly is connected to the at least one source driver, and the compensation circuit is used to output a first gamma signal and a second gamma signal to the at least one source driver.

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