Source driving circuit, data voltage providing method and display device

Abstract

The present invention provides a source driver circuit, a data voltage supply method, and a display device. The source driver circuit includes multiple source driver units; the source driver units include a data voltage generation circuit, a judgment circuit, and an adjustment circuit; the judgment circuit is electrically connected to the data voltage generation circuit and the adjustment circuit, respectively, and is used to determine whether the data voltage provided by the data voltage generation circuit is on the rising edge or the falling edge, and based on the judgment result, control the adjustment circuit to adjust the rising edge drive current or the falling edge drive current; the data voltage generation circuit is electrically connected to the adjustment circuit, and is used to provide a data voltage and adjust the data voltage based on the rising edge drive current or the falling edge drive current. The present invention can improve line afterimage and H-crosstalk (crosstalk) phenomena.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a source driving circuit, a data voltage providing method and a display device. Background Art

[0002] In related technologies, when a liquid crystal display displays grayscale changes, the Slew rate (voltage conversion rate) of the data voltage provided by the OP (operational amplifier) ​​inside the source driver circuit is related to the voltage difference between the current data voltage and the target data voltage, and will change in real time. When approaching the target data voltage, the falling edge speed is always faster than the rising edge speed, causing the common electrode voltage Vcom to be pulled downward; when the afterimage screen is lit, the pixel row whose common electrode voltage Vcom is pulled has a different charge accumulation from other pixel rows, resulting in multi-row afterimages, and the H-Crosstalk (crosstalk) test screen will show H-Crosstalk defects when the light is turned on.

[0003] Source driver circuits using the CEDS (Clock-Embedded Differential Signaling) or CHPI (Clock-embedded High-speed Point-to-point Interface) protocols do not have an AFCC module, and output symmetry is only related to the PMOS and NMOS transistors in the OP within the source driver circuit. Therefore, the data voltage curve provided by the source driver circuit in current LCD products is not a straight line, but a curve with a gradually decreasing slope. Furthermore, when approaching the target data voltage, the falling edge speed is always faster than the rising edge speed, causing the common electrode voltage Vcom to be pulled downward.

[0004] The current source driver circuit can only adjust the Slew rate of the positive and negative polarity data voltages. When the Slew rate of the data voltage of a certain polarity is accelerated, both the falling edge speed and the rising edge speed will be accelerated. It is not compatible with the high grayscale to low grayscale situation and the low grayscale to high grayscale situation. The falling edge speed and the rising edge speed do not match, and the current Slewrate adjustment mainly adjusts the first half of the data voltage and has little effect on the second half. Therefore, it cannot improve the line afterimage and H-Crosstalk (crosstalk) phenomenon.

[0005] In the related art, when displaying Figure 1A After a while, when the afterimage screen shown in the figure switches to the grayscale screen, Figure 1B As shown in the figure, multiple lines of residual image appear. When the H-Crosstalk screen is lit, Figure 1C As shown, crosstalk will occur. Summary of the Invention

[0006] The main purpose of the present invention is to provide a source driving circuit, a data voltage providing method and a display device to solve the problem that the related art cannot improve the line afterimage and H-Crosstalk phenomena.

[0007] In one aspect, an embodiment of the present invention provides a source driving circuit, comprising a plurality of source driving units; the source driving units include a data voltage generating circuit, a judging circuit, and an adjusting circuit;

[0008] The judgment circuit is electrically connected to the data voltage generating circuit and the regulating circuit respectively, and is used to judge whether the data voltage provided by the data voltage generating circuit is at a rising edge or a falling edge, and control the regulating circuit to adjust the rising edge driving current or the falling edge driving current according to the judgment result;

[0009] The data voltage generating circuit is electrically connected to the regulating circuit, and is configured to provide a data voltage and regulate the data voltage according to the rising edge driving current or the falling edge driving current.

[0010] Optionally, the data voltage generating circuit includes a positive phase input terminal, a negative phase input terminal, and an output terminal, and the data voltage generating circuit is further configured to generate and provide a data voltage to the output terminal according to a positive phase input voltage connected to the positive phase input terminal and a negative phase input voltage connected to the negative phase input terminal;

[0011] The judgment circuit is used to judge whether the data voltage is at a rising edge or a falling edge according to the voltage difference between the positive input voltage and the negative input voltage, and the voltage value of the data voltage.

[0012] The source driving circuit according to at least one embodiment of the present invention further includes a comparison circuit;

[0013] The source driving circuit includes a first source driving unit and a second source driving unit; the first source driving unit includes a first data voltage generating circuit, a first judgment circuit and a first adjustment circuit, and the second source driving unit includes a second data voltage generating circuit, a second judgment circuit and a second adjustment circuit;

[0014] The comparison circuit is electrically connected to the first judgment circuit, the second judgment circuit, the first regulation circuit and the second regulation circuit respectively;

[0015] The comparison circuit is configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is on a rising edge and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is on a falling edge, control the first regulation circuit to adjust the rising-edge driving current and / or control the second regulation circuit to adjust the falling-edge driving current until the comparison circuit obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage. The comparison circuit is further configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage is on a falling edge and the second judgment circuit determines that the second data voltage is on a rising edge, control the first regulation circuit to adjust the falling-edge driving current and / or control the second regulation circuit to adjust the rising-edge driving current until the comparison circuit obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0016] Optionally, the first source driving unit and the second source driving unit are adjacent source driving units.

[0017] Optionally, the judgment circuit is used to judge that the data voltage is on a rising edge when the voltage difference between the positive input voltage and the negative input voltage is greater than the voltage value of the data voltage, and to judge that the data voltage is on a falling edge when the voltage difference between the positive input voltage and the negative input voltage is less than the voltage value of the data voltage.

[0018] In a second aspect, an embodiment of the present invention provides a data voltage providing method, which is applied to the above-mentioned source driving circuit. The data voltage providing method includes:

[0019] The data voltage generating circuit provides a data voltage;

[0020] The judging circuit judges whether the data voltage provided by the data voltage generating circuit is at a rising edge or a falling edge, and controls the regulating circuit to regulate the rising edge driving current or the falling edge driving current according to the judging result;

[0021] The data voltage generating circuit adjusts the data voltage according to the rising edge driving current or the falling edge driving current.

[0022] Optionally, the source driving circuit further includes a comparison circuit; the source driving circuit includes a first source driving unit and a second source driving unit; the first source driving unit includes a first data voltage generating circuit, a first judgment circuit, and a first adjustment circuit; the second source driving unit includes a second data voltage generating circuit, a second judgment circuit, and a second adjustment circuit; the data voltage providing method further includes:

[0023] When it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is on a rising edge, and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is on a falling edge, the comparison circuit controls the first regulation circuit to adjust the rising edge driving current, and / or controls the second regulation circuit to adjust the falling edge driving current, until the comparison circuit determines that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage;

[0024] When the comparison circuit determines that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage is on a falling edge, and the second judgment circuit determines that the second data voltage is on a rising edge, the comparison circuit controls the first regulation circuit to adjust the falling edge driving current, and / or controls the second regulation circuit to adjust the rising edge driving current, until the comparison circuit compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0025] Optionally, when the grayscale corresponding to the data voltage rises and the data voltage is at a rising edge, the data voltage supply period includes a first stage, a second stage, and a third stage; and the data voltage supply method includes:

[0026] In the first stage, the regulating circuit increases the rising edge driving current;

[0027] In the second stage, the regulating circuit lowers the rising edge driving current;

[0028] In the third stage, the regulating circuit increases the rising edge drive current.

[0029] Optionally, when the grayscale corresponding to the data voltage rises and the data voltage is at a falling edge, the data voltage supply period includes a first stage, a second stage, and a third stage; and the data voltage supply method includes:

[0030] In the first stage, the regulating circuit lowers the falling edge driving current;

[0031] In the second stage, the regulating circuit increases the falling edge driving current;

[0032] In the third stage, the regulation circuit lowers the falling edge drive current.

[0033] Optionally, when the comparison circuit determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage rise, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit determines that the first data voltage is on a rising edge, and the second judgment circuit determines that the second data voltage is on a falling edge, the data voltage supply time period includes a first stage, a second stage, and a third stage; and the data voltage supply method includes:

[0034] In the first stage, the comparison circuit controls the first regulation circuit to increase the rising edge drive current, and / or controls the second regulation circuit to decrease the falling edge drive current;

[0035] In the second stage, the comparison circuit controls the first regulation circuit to lower the rising edge drive current, and / or controls the second regulation circuit to increase the falling edge drive current;

[0036] In the third stage, the comparison circuit controls the first regulation circuit to increase the rising edge drive current, and / or controls the second regulation circuit to decrease the falling edge drive current;

[0037] So that at the end of the third stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0038] Optionally, when the grayscale corresponding to the data voltage decreases and the data voltage is at a falling edge, the data voltage supply period includes a fourth stage, a fifth stage, and a sixth stage; and the data voltage supply method includes:

[0039] In the fourth stage, the regulating circuit lowers the falling edge driving current;

[0040] In the fifth stage, the regulating circuit increases the falling edge driving current;

[0041] In the sixth stage, the regulating circuit lowers the falling edge driving current.

[0042] Optionally, when the grayscale corresponding to the data voltage decreases and the data voltage is at a rising edge, the data voltage supply period includes a fourth stage, a fifth stage, and a sixth stage; and the data voltage supply method includes:

[0043] In the fourth stage, the regulating circuit increases the rising edge driving current;

[0044] In the fifth stage, the regulating circuit lowers the rising edge driving current;

[0045] In the sixth stage, the regulating circuit increases the rising edge driving current.

[0046] Optionally, when the comparison circuit determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage decrease, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit determines that the first data voltage is on a falling edge, and the second judgment circuit determines that the second data voltage is on a rising edge, the data voltage supply time period includes a fourth stage, a fifth stage, and a sixth stage; and the data voltage supply method includes:

[0047] In the fourth stage, the comparison circuit controls the first regulation circuit to lower the falling edge drive current, and / or controls the second regulation circuit to increase the rising edge drive current;

[0048] In the fifth stage, the comparison circuit controls the first regulation circuit to increase the falling edge drive current, and / or controls the second regulation circuit to decrease the rising edge drive current;

[0049] In the sixth stage, the comparison circuit controls the first regulation circuit to lower the falling edge drive current, and / or controls the second regulation circuit to increase the rising edge drive current;

[0050] So that at the end of the sixth stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0051] In a third aspect, an embodiment of the present invention provides a display device including the above-mentioned source driving circuit.

[0052] The source driving circuit, data voltage providing method and display device described in the embodiments of the present invention can improve line afterimage and H-Crosstalk phenomena. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1A It is a schematic diagram of the afterimage screen;

[0054] Figure 1B In the related art, when the display is as shown Figure 1A Schematic diagram of the multi-line afterimage that appears when the afterimage image shown switches to a grayscale image after a period of time;

[0055] Figure 1C In the related art, when the display is as shown Figure 1A Schematic diagram of the crosstalk phenomenon that occurs when the afterimage screen shown above switches to the H-Crosstalk screen after a period of time;

[0056] Figure 2 is a structural diagram of a source driver circuit according to at least one embodiment of the present invention;

[0057] Figure 3 is a structural diagram of a source driver circuit according to at least one embodiment of the present invention;

[0058] Figure 4A In the related art, when the gray scale corresponding to the data voltage rises, a waveform diagram of a first data voltage on the first column data line S1 and a waveform diagram of a second data voltage on the second column data line S2 are shown;

[0059] Figure 4B is Figure 4A On the basis of the above, a waveform diagram of the common electrode voltage Vcom is added;

[0060] Figure 5 4 is a structural diagram of a source driver circuit according to at least one embodiment of the present invention. DETAILED DESCRIPTION

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0062] The transistors used in all embodiments of the present invention may be thin film transistors, field effect transistors, or other devices with the same characteristics. In the embodiments of the present invention, to distinguish the two electrodes of the transistor except the gate, one electrode is referred to as the first electrode and the other electrode is referred to as the second electrode.

[0063] In actual operation, when the transistor is a thin film transistor or a field effect transistor, the first electrode may be a drain electrode, and the second electrode may be a source electrode; or, the first electrode may be a source electrode, and the second electrode may be a drain electrode.

[0064] The source driving circuit according to the embodiment of the present invention includes a plurality of source driving units; Figure 2 As shown, the source driving unit includes a data voltage generating circuit 21, a judging circuit 22 and an adjusting circuit 23;

[0065] The judgment circuit 22 is electrically connected to the data voltage generating circuit 21 and the regulating circuit 23, respectively, and is used to judge whether the data voltage provided by the data voltage generating circuit 21 is at a rising edge or a falling edge, and control the regulating circuit 23 to adjust the rising edge driving current or the falling edge driving current according to the judgment result;

[0066] The data voltage generating circuit 21 is electrically connected to the regulating circuit 23 , and is configured to provide a data voltage and regulate the data voltage according to the rising edge driving current or the falling edge driving current.

[0067] When the source driving circuit described in the embodiment of the present invention is working, when the data voltage provided by the data voltage generating circuit 21 in the source driving unit changes, the judgment circuit 22 can judge whether the data voltage is at a rising edge or a falling edge. The adjustment circuit 23 can adjust the rising edge driving current or the falling edge driving current according to the judgment result to improve the common electrode voltage pull, thereby improving line afterimage and H-Crosstalk.

[0068] When the source driving circuit described in the embodiment of the present invention is working, the magnitude and action time of the rising edge driving current and the magnitude and action time of the falling edge driving current can be adjusted through the adjustment circuit 23 to improve and eliminate the common electrode voltage pull.

[0069] In at least one embodiment of the present invention, two current sources may be provided in the regulating circuit 23 . By controlling the current sources, the rising edge driving current and the falling edge driving current may be adjusted to adjust the voltage conversion rate of the data voltage.

[0070] In specific implementation, the regulating circuit may contain a module that can control the current action time. The action time module is divided according to the protocol, with 1T as the minimum unit. When the USIT protocol or CHPI protocol is adopted, 1T includes 10 bytes, which corresponds to R data packet, G data packet or B data packet; the action time division segment is set to a minimum of 3 segments, corresponding to Figure 4B The common electrode voltage Vcom is pulled in three stages. Considering that the Vcom waveform may change after adjusting a certain stage, the function segment can be appropriately increased. The setting of this module can add idle byte positions in the control management data of each current protocol to define the control signal sent by the timing controller Tcon.

[0071] In at least one embodiment of the present invention, the data voltage generating circuit includes a positive phase input terminal, a negative phase input terminal, and an output terminal. The data voltage generating circuit is further configured to generate and provide a data voltage to the output terminal based on a positive phase input voltage connected to the positive phase input terminal and a negative phase input voltage connected to the negative phase input terminal.

[0072] The judgment circuit is used to judge whether the data voltage is at a rising edge or a falling edge according to the voltage difference between the positive input voltage and the negative input voltage, and the voltage value of the data voltage.

[0073] In a specific implementation, the data voltage generating circuit may include a positive input terminal, a negative input terminal and an output terminal. The data voltage generating circuit generates and provides a data voltage to the output terminal based on the positive input voltage and the negative input voltage; the judgment circuit judges whether the data voltage is at a rising edge or a falling edge based on the voltage difference between the positive input voltage and the negative input voltage, as well as the voltage value of the data voltage.

[0074] In at least one embodiment of the present invention, the judgment circuit is used to judge that the data voltage is on a rising edge when the voltage difference between the positive input voltage and the negative input voltage is greater than the voltage value of the data voltage, and to judge that the data voltage is on a falling edge when the voltage difference between the positive input voltage and the negative input voltage is less than the voltage value of the data voltage.

[0075] like Figure 3 As shown, in Figure 2 Based on at least one embodiment shown, the data voltage generating circuit 21 includes a positive phase input terminal I1, a negative phase input terminal I2, and an output terminal S0. The data voltage generating circuit is further configured to generate and provide a data voltage to the output terminal S0 based on a positive phase input voltage connected to the positive phase input terminal I1 and a negative phase input voltage connected to the negative phase input terminal I2.

[0076] The judgment circuit 22 is configured to judge whether the data voltage is at a rising edge or a falling edge according to a voltage difference between the positive-phase input voltage and the negative-phase input voltage, and a voltage value of the data voltage.

[0077] In a specific implementation, when the voltage difference between the positive input voltage and the negative input voltage is greater than the voltage value of the data voltage, the judgment circuit 22 judges that the data voltage is on a rising edge; when the voltage difference between the positive input voltage and the negative input voltage is less than the voltage value of the data voltage, it judges that the data voltage is on a falling edge.

[0078] like Figure 4A As shown, in the related art, when the grayscale corresponding to the data voltage rises, for example, from black to white, the voltage value of the first data voltage on the first column data line S1 is at the rising edge, and the voltage value of the second data voltage on the second column data line S2 is at the falling edge;

[0079] In the first stage T1, the voltage value of the first data voltage rises by 4.06V, and the voltage value of the second data voltage drops by 5.09V. The falling speed of the second data voltage is faster than the rising speed of the first data voltage. The duration of the first stage T1 is 125ns. During this process, the common electrode voltage Vcom is pulled down by 300mV.

[0080] In the second stage T2, the voltage value of the first data voltage rises by 2.24V, and the voltage value of the second data voltage drops by 1.14V. The falling speed of the second data voltage is slower than the rising speed of the first data voltage. The duration of the second stage T2 is 175ns. During this process, Vcom is pulled back to a near normal level.

[0081] In the third stage T3, the voltage value of the first data voltage rises by 293 mV, and the voltage value of the second data voltage drops by 707 mV. The falling speed of the second data voltage is faster than the rising speed of the first data voltage. The duration of the first stage T1 is 825 ns. During this process, the common electrode voltage Vcom is pulled down by 200 mV.

[0082] In the first stable stage T01 , the first data voltage slowly rises to the target data voltage, and the second data voltage basically reaches a stable state, but cannot pull Vcom back upward. The duration of the first stable stage T01 is 50 μs.

[0083] In a specific implementation, the first column of data lines and the second column of data lines may be adjacent data lines, and the polarities of data voltages on the adjacent data lines may be opposite.

[0084] like Figure 4B As shown, in Figure 4A On the basis of FIG, a waveform diagram of the common electrode voltage Vcom is added.

[0085] Figure 2 、 Figure 3 In at least one embodiment shown, when the grayscale corresponding to the data voltage rises and the data voltage is at a rising edge, the data voltage supply period may include a first stage, a second stage, and a third stage.

[0086] In the first stage, the regulating circuit 23 increases the rising edge driving current;

[0087] In the second stage, the regulating circuit 23 lowers the rising edge driving current;

[0088] In the third stage, the regulating circuit 23 increases the rising edge driving current;

[0089] In this way, during the entire process of the data voltage rising, Vcom is not pulled or the pulling amplitude is small, thereby achieving the purpose of eliminating line afterimage and H-Crosstalk.

[0090] Figure 2 、 Figure 3In at least one embodiment shown, when the grayscale corresponding to the data voltage rises and the data voltage is at a falling edge, the data voltage supply period may include a first stage, a second stage, and a third stage.

[0091] In the first stage, the regulating circuit 23 lowers the falling edge driving current;

[0092] In the second stage, the regulating circuit 23 increases the falling edge driving current;

[0093] In the third stage, the regulating circuit 23 lowers the falling edge driving current;

[0094] In this way, during the entire process of the data voltage rising, Vcom is not pulled or the pulling amplitude is small, thereby achieving the purpose of eliminating line afterimage and H-Crosstalk.

[0095] In the related art, when the grayscale corresponding to the data voltage decreases, for example, from white to black, the voltage value of the first data voltage on the first column data line S1 is at a falling edge, and the voltage value of the second data voltage on the second column data line S2 is at a rising edge;

[0096] In the fourth stage, the first data voltage drops faster than the second data voltage rises, and the common electrode voltage Vcom is pulled downward;

[0097] In the fifth stage, the falling speed of the first data voltage is slower than the rising speed of the second data voltage, and the common electrode voltage Vcom is pulled back to a near normal level;

[0098] In the sixth stage, the first data voltage drops faster than the second data voltage rises, and the common electrode voltage Vcom is pulled downward;

[0099] In the second stable stage, the voltage value of the second data voltage slowly rises to the target data voltage, and the first data voltage basically reaches a stable state, but at this time it is unable to pull Vcom back upward.

[0100] Figure 2 、 Figure 3 In at least one embodiment shown, when the grayscale corresponding to the data voltage decreases, for example, from white to black, and the data voltage is at a falling edge, the data voltage supply period may include a fourth stage, a fifth stage, and a sixth stage.

[0101] In the fourth stage, the regulating circuit 23 lowers the falling edge driving current;

[0102] In the fifth stage, the regulating circuit 23 increases the falling edge driving current;

[0103] In the sixth stage, the regulating circuit 23 lowers the falling edge driving current;

[0104] In this way, during the entire process of the data voltage rising, Vcom is not pulled or the pulling amplitude is small, thereby achieving the purpose of eliminating line afterimage and H-Crosstalk.

[0105] Figure 2 、 Figure 3 In at least one embodiment shown, when the grayscale corresponding to the data voltage decreases, for example, from white to black, and the data voltage is at a rising edge, the data voltage supply period may include a fourth stage, a fifth stage, and a sixth stage;

[0106] In the fourth stage, the regulating circuit 23 increases the rising edge driving current;

[0107] In the fifth stage, the regulating circuit 23 lowers the rising edge driving current;

[0108] In the sixth stage, the regulating circuit 23 increases the rising edge driving current;

[0109] In this way, during the entire process of the data voltage rising, Vcom is not pulled or the pulling amplitude is small, thereby achieving the purpose of eliminating line afterimage and H-Crosstalk.

[0110] The source driving circuit according to at least one embodiment of the present invention further includes a comparison circuit;

[0111] The source driving circuit may include a first source driving unit and a second source driving unit; the first source driving unit includes a first data voltage generating circuit, a first judgment circuit and a first regulating circuit, and the second source driving unit includes a second data voltage generating circuit, a second judgment circuit and a second regulating circuit;

[0112] The comparison circuit is electrically connected to the first judgment circuit, the second judgment circuit, the first regulation circuit and the second regulation circuit respectively;

[0113] The comparison circuit is configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is on a rising edge and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is on a falling edge, control the first regulation circuit to adjust the rising-edge driving current and / or control the second regulation circuit to adjust the falling-edge driving current until the comparison circuit obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage. The comparison circuit is further configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage is on a falling edge and the second judgment circuit determines that the second data voltage is on a rising edge, control the first regulation circuit to adjust the falling-edge driving current and / or control the second regulation circuit to adjust the rising-edge driving current until the comparison circuit obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0114] In at least one embodiment of the present invention, the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, which means that the grayscale corresponding to the first source driving unit changes from the first grayscale to the second grayscale, and the grayscale corresponding to the second source driving unit changes from the first grayscale to the second grayscale.

[0115] In a specific implementation, a comparison circuit may be added to the source driving circuit. The source driving circuit may include a first source driving unit and a second source driving unit. The polarity of the first data voltage provided by the first source driving unit may be opposite to the polarity of the second data voltage provided by the second source driving unit.

[0116] When the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is at a rising edge, and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is at a falling edge, the comparison circuit controls the first regulation circuit to adjust the rising edge driving current, and / or controls the second regulation circuit to adjust the falling edge driving current, until the comparison circuit determines that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage, so that the voltage change rate of the first data voltage is equal to the voltage change rate of the second data voltage;

[0117] When the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit judges that the first data voltage is on a falling edge, and the second judgment circuit judges that the second data voltage is on a rising edge, the comparison circuit controls the first regulation circuit to adjust the falling edge driving current, and / or controls the second regulation circuit to adjust the rising edge driving current, until the comparison circuit compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage, so that the voltage change rate of the first data voltage is equal to the voltage change rate of the second data voltage.

[0118] Optionally, the first source driving unit and the second source driving unit may be adjacent source driving units, the first source driving unit may provide a first data voltage for a first column of data lines, the second source driving unit may provide a second data voltage for a second column of data lines, and the first column of data lines and the second column of data lines may be adjacent data lines.

[0119] like Figure 5 As shown, the source driving circuit according to at least one embodiment of the present invention may include a comparison circuit 50;

[0120] The source driving circuit may include a first source driving unit and a second source driving unit;

[0121] The first source driving unit includes a first data voltage generating circuit 511, a first judging circuit 512 and a first regulating circuit 513;

[0122] The first judgment circuit 512 is electrically connected to the first data voltage generating circuit 511 and the first regulating circuit 513, respectively, and is used to judge whether the first data voltage Vd1 provided by the first data voltage generating circuit 511 is at a rising edge or a falling edge, and control the first regulating circuit 513 to adjust the first rising edge driving current or the first falling edge driving current according to the judgment result;

[0123] The first data voltage generating circuit 511 is electrically connected to the first regulating circuit 513 and is configured to provide a first data voltage Vd1 and regulate the first data voltage Vd1 according to the first rising edge driving current or the first falling edge driving current;

[0124] The second source driving unit includes a second data voltage generating circuit 521, a second judging circuit 522 and a second regulating circuit 523;

[0125] The second judgment circuit 522 is electrically connected to the second data voltage generating circuit 521 and the second regulating circuit 523, respectively, and is used to judge whether the second data voltage Vd2 provided by the second data voltage generating circuit 521 is at a rising edge or a falling edge, and control the second regulating circuit 523 to adjust the second rising edge driving current or the second falling edge driving current according to the judgment result;

[0126] The second data voltage generating circuit 521 is electrically connected to the second regulating circuit 523, and is configured to provide a second data voltage Vd2, and regulate the second data voltage Vd2 according to the second rising edge driving current or the second falling edge driving current;

[0127] The comparison circuit 50 is electrically connected to the first judgment circuit 512, the second judgment circuit 522, the first adjustment circuit 513 and the second adjustment circuit 523 respectively;

[0128] The comparison circuit 50 is configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and when the first judgment circuit 512 determines that the first data voltage Vd1 provided by the first data voltage generating circuit 511 is on a rising edge, and when the second judgment circuit 522 determines that the second data voltage Vd2 provided by the second data voltage generating circuit 521 is on a falling edge, control the first regulation circuit 513 to regulate the first rising edge driving current, and / or control the second regulation circuit 523 to regulate the second falling edge driving current, until the comparison circuit 50 determines that the voltage change value of the first data voltage Vd1 is equal to the voltage change value of the second data voltage Vd2;

[0129] The comparison circuit 50 is also used to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit 512 determines that the first data voltage Vd1 is on a falling edge, and the second judgment circuit 522 determines that the second data voltage Vd2 is on a rising edge, control the first regulation circuit 513 to adjust the first falling edge driving current, and / or control the second regulation circuit to adjust the second rising edge driving current, until the comparison circuit 50 compares and obtains that the voltage change value of the first data voltage Vd1 is equal to the voltage change value of the second data voltage Vd2.

[0130] Optionally, the first source driving unit and the second source driving unit may be adjacent source driving units, but is not limited thereto.

[0131] Figure 5In at least one embodiment shown in FIG. 5 , when the comparison circuit 50 determines that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, for example, both change from grayscale 0 to grayscale 255, the comparison circuit 50 operates normally; first, the first judgment circuit 512 determines whether the first data voltage is at a rising edge or a falling edge, and the second judgment circuit 522 determines whether the second data voltage is at a falling edge or a rising edge, and then respectively provides the data voltage difference to the comparison circuit 50; when the first data voltage is at a rising edge and the second data voltage is at a falling edge, the comparison circuit 50 controls the first regulating circuit 512 to adjust the voltage. The first regulating circuit 513 regulates the first rising edge driving current, and / or controls the second regulating circuit 523 to regulate the second falling edge driving current, until the comparison circuit 50 compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage; when the first data voltage is at a falling edge and the second data voltage is at a rising edge, the comparison circuit 50 controls the first regulating circuit 513 to regulate the first falling edge driving current, and / or controls the second regulating circuit 523 to regulate the second rising edge driving current, until the comparison circuit 50 compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0132] Figure 5 In at least one embodiment shown, when the comparison circuit 50 determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage rise, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit 512 determines that the first data voltage is at a rising edge, and the second judgment circuit 522 determines that the second data voltage is at a falling edge, the data voltage supply period may include a first stage, a second stage, and a third stage.

[0133] In the first stage, the comparison circuit controls the first regulation circuit 513 to increase the first rising edge driving current, and / or controls the second regulation circuit 523 to decrease the second falling edge driving current;

[0134] In the second stage, the comparison circuit controls the first regulation circuit 513 to lower the first rising edge driving current, and / or controls the second regulation circuit 523 to increase the second falling edge driving current;

[0135] In the third stage, the comparison circuit controls the first regulation circuit 513 to increase the first rising edge driving current, and / or controls the second regulation circuit 523 to decrease the second falling edge driving current;

[0136] At the end of the third stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage, thereby eliminating Vcom pull and solving the line afterimage and H-crosstalk problems. The driving current of each channel can be adaptively adjusted without manual debugging and setting.

[0137] Figure 5 In at least one embodiment shown, when the comparison circuit 50 determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage decrease, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit 512 determines that the first data voltage is at a falling edge, and the second judgment circuit 522 determines that the second data voltage is at a rising edge, the data voltage supply period may include a fourth stage, a fifth stage, and a sixth stage.

[0138] In the fourth stage, the comparison circuit 50 controls the first regulation circuit 513 to lower the first falling edge driving current, and / or controls the second regulation circuit 523 to increase the second rising edge driving current;

[0139] In the fifth stage, the comparison circuit 50 controls the first regulation circuit 513 to increase the first falling edge driving current, and / or controls the second regulation circuit 523 to decrease the second rising edge driving current;

[0140] In the sixth stage, the comparison circuit 50 controls the first regulation circuit 513 to lower the first falling edge driving current, and / or controls the second regulation circuit 523 to increase the second rising edge driving current;

[0141] At the end of the sixth stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage, thereby eliminating Vcom pull and solving the line afterimage and H-Crosstalk problems. The driving current of each channel can be adaptively adjusted without manual debugging and setting.

[0142] At least one embodiment of the present invention provides a data voltage providing method, which is applied to the above-mentioned source driving circuit. The data voltage providing method includes:

[0143] The data voltage generating circuit provides a data voltage;

[0144] The judging circuit judges whether the data voltage provided by the data voltage generating circuit is at a rising edge or a falling edge, and controls the regulating circuit to regulate the rising edge driving current or the falling edge driving current according to the judging result;

[0145] The data voltage generating circuit adjusts the data voltage according to the rising edge driving current or the falling edge driving current.

[0146] In the data voltage providing method described in an embodiment of the present invention, when the data voltage provided by the data voltage generating circuit changes, the judgment circuit can determine whether the data voltage is at a rising edge or a falling edge. The adjustment circuit can adjust the rising edge drive current or the falling edge drive current based on the judgment result to improve the common electrode voltage pull, thereby improving line afterimage and H-crosstalk.

[0147] In specific implementation, the magnitude and action time of the rising edge driving current and the magnitude and action time of the falling edge driving current can be adjusted by adjusting the circuit to improve and then eliminate the common electrode voltage pull.

[0148] In at least one embodiment of the present invention, the source driving circuit further includes a comparison circuit; the source driving circuit includes a first source driving unit and a second source driving unit; the first source driving unit includes a first data voltage generating circuit, a first judgment circuit, and a first adjustment circuit; the second source driving unit includes a second data voltage generating circuit, a second judgment circuit, and a second adjustment circuit; the data voltage providing method further includes:

[0149] When it is determined that a grayscale change corresponding to the first source driving unit is consistent with a grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is at a rising edge, and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is at a falling edge, the comparison circuit controls the first regulation circuit to adjust the rising-edge driving current, and / or controls the second regulation circuit to adjust the falling-edge driving current, until the comparison circuit determines that a voltage change value of the first data voltage is equal to a voltage change value of the second data voltage;

[0150] When the comparison circuit determines that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage is on a falling edge, and the second judgment circuit determines that the second data voltage is on a rising edge, the comparison circuit controls the first regulation circuit to adjust the falling edge driving current, and / or controls the second regulation circuit to adjust the rising edge driving current, until the comparison circuit compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0151] In at least one embodiment of the present invention, the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, which means that the grayscale corresponding to the first source driving unit changes from the first grayscale to the second grayscale, and the grayscale corresponding to the second source driving unit changes from the first grayscale to the second grayscale.

[0152] In a specific implementation, a comparison circuit may be added to the source driving circuit. The source driving circuit may include a first source driving unit and a second source driving unit. The polarity of the first data voltage provided by the first source driving unit may be opposite to the polarity of the second data voltage provided by the second source driving unit.

[0153] When the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is at a rising edge, and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is at a falling edge, the comparison circuit controls the first regulation circuit to adjust the rising edge driving current, and / or controls the second regulation circuit to adjust the falling edge driving current, until the comparison circuit determines that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage, so that the voltage change rate of the first data voltage is equal to the voltage change rate of the second data voltage;

[0154] When the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit judges that the first data voltage is on a falling edge, and the second judgment circuit judges that the second data voltage is on a rising edge, the comparison circuit controls the first regulation circuit to adjust the falling edge driving current, and / or controls the second regulation circuit to adjust the rising edge driving current, until the comparison circuit compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage, so that the voltage change rate of the first data voltage is equal to the voltage change rate of the second data voltage.

[0155] In at least one embodiment of the present invention, when the grayscale corresponding to the data voltage rises and the data voltage is at a rising edge, the data voltage providing period includes a first stage, a second stage, and a third stage; and the data voltage providing method includes:

[0156] In the first stage, the regulating circuit increases the rising edge driving current;

[0157] In the second stage, the regulating circuit lowers the rising edge driving current;

[0158] In the third stage, the regulating circuit increases the rising edge drive current.

[0159] In at least one embodiment of the present invention, when the grayscale corresponding to the data voltage rises and the data voltage is at a falling edge, the data voltage providing period includes a first stage, a second stage, and a third stage; and the data voltage providing method includes:

[0160] In the first stage, the regulating circuit lowers the falling edge driving current;

[0161] In the second stage, the regulating circuit increases the falling edge driving current;

[0162] In the third stage, the regulation circuit lowers the falling edge drive current.

[0163] In at least one embodiment of the present invention, when the comparison circuit determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage rise, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit determines that the first data voltage is on a rising edge, and the second judgment circuit determines that the second data voltage is on a falling edge, the data voltage supply period includes a first stage, a second stage, and a third stage; and the data voltage supply method includes:

[0164] In the first stage, the comparison circuit controls the first regulation circuit to increase the rising edge drive current, and / or controls the second regulation circuit to decrease the falling edge drive current;

[0165] In the second stage, the comparison circuit controls the first regulation circuit to lower the rising edge drive current, and / or controls the second regulation circuit to increase the falling edge drive current;

[0166] In the third stage, the comparison circuit controls the first regulation circuit to increase the rising edge drive current, and / or controls the second regulation circuit to decrease the falling edge drive current;

[0167] So that at the end of the third stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0168] In at least one embodiment of the present invention, when the grayscale corresponding to the data voltage decreases and the data voltage is at a falling edge, the data voltage supply period includes a fourth stage, a fifth stage, and a sixth stage; and the data voltage supply method includes:

[0169] In the fourth stage, the regulating circuit lowers the falling edge driving current;

[0170] In the fifth stage, the regulating circuit increases the falling edge driving current;

[0171] In the sixth stage, the regulating circuit lowers the falling edge driving current.

[0172] In at least one embodiment of the present invention, when the grayscale corresponding to the data voltage decreases and the data voltage is on a rising edge, the data voltage supply period includes a fourth stage, a fifth stage, and a sixth stage; and the data voltage supply method includes:

[0173] In the fourth stage, the regulating circuit increases the rising edge driving current;

[0174] In the fifth stage, the regulating circuit lowers the rising edge driving current;

[0175] In the sixth stage, the regulating circuit increases the rising edge driving current.

[0176] In at least one embodiment of the present invention, when the comparison circuit determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage decrease, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit determines that the first data voltage is on a falling edge, and the second judgment circuit determines that the second data voltage is on a rising edge, the data voltage supply period includes a fourth stage, a fifth stage, and a sixth stage; and the data voltage supply method includes:

[0177] In the fourth stage, the comparison circuit controls the first regulation circuit to lower the falling edge drive current, and / or controls the second regulation circuit to increase the rising edge drive current;

[0178] In the fifth stage, the comparison circuit controls the first regulation circuit to increase the falling edge drive current, and / or controls the second regulation circuit to decrease the rising edge drive current;

[0179] In the sixth stage, the comparison circuit controls the first regulation circuit to lower the falling edge drive current, and / or controls the second regulation circuit to increase the rising edge drive current;

[0180] So that at the end of the sixth stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

[0181] The display device according to the embodiment of the present invention includes a display panel and the above-mentioned source driving circuit;

[0182] The display panel includes a plurality of pixels, and the source driving circuit is used to provide data voltages for the pixels.

[0183] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A source driver circuit, characterized in that: It includes a plurality of source driving units; the source driving unit includes a data voltage generating circuit, a judgment circuit and an adjustment circuit; The judgment circuit is electrically connected to the data voltage generating circuit and the regulating circuit respectively, and is used to judge whether the data voltage provided by the data voltage generating circuit is at a rising edge or a falling edge, and control the regulating circuit to adjust the rising edge driving current or the falling edge driving current according to the judgment result; The data voltage generating circuit is electrically connected to the regulating circuit, and is configured to provide a data voltage and regulate the data voltage according to the rising edge driving current or the falling edge driving current; The data voltage generating circuit includes a positive phase input terminal, a negative phase input terminal and an output terminal, and is further configured to generate and provide a data voltage to the output terminal according to a positive phase input voltage connected to the positive phase input terminal and a negative phase input voltage connected to the negative phase input terminal; The judgment circuit is used to judge whether the data voltage is at a rising edge or a falling edge according to the voltage difference between the positive input voltage and the negative input voltage, and the voltage value of the data voltage; The source driving circuit further includes a comparison circuit; The source driving circuit includes a first source driving unit and a second source driving unit; the first source driving unit includes a first data voltage generating circuit, a first judgment circuit and a first adjustment circuit, and the second source driving unit includes a second data voltage generating circuit, a second judgment circuit and a second adjustment circuit; The comparison circuit is electrically connected to the first judgment circuit, the second judgment circuit, the first regulation circuit and the second regulation circuit respectively; The comparison circuit is configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is on a rising edge and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is on a falling edge, control the first regulation circuit to adjust the rising-edge driving current and / or control the second regulation circuit to adjust the falling-edge driving current until the comparison circuit obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage. The comparison circuit is further configured to, when it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage is on a falling edge and the second judgment circuit determines that the second data voltage is on a rising edge, control the first regulation circuit to adjust the falling-edge driving current and / or control the second regulation circuit to adjust the rising-edge driving current until the comparison circuit obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

2. The source driver circuit according to claim 1, wherein: The first source driving unit and the second source driving unit are adjacent source driving units.

3. The source driver circuit according to claim 1, wherein: The judgment circuit is used to judge that the data voltage is on a rising edge when the voltage difference between the positive input voltage and the negative input voltage is greater than the voltage value of the data voltage, and to judge that the data voltage is on a falling edge when the voltage difference between the positive input voltage and the negative input voltage is less than the voltage value of the data voltage.

4. A data voltage providing method, applied to the source driving circuit according to any one of claims 1 to 3, characterized in that: The data voltage providing method includes: The data voltage generating circuit provides a data voltage; The judging circuit judges whether the data voltage provided by the data voltage generating circuit is at a rising edge or a falling edge, and controls the regulating circuit to regulate the rising edge driving current or the falling edge driving current according to the judging result; A data voltage generating circuit adjusts the data voltage according to the rising edge driving current or the falling edge driving current; The source driving circuit further includes a comparison circuit; the source driving circuit includes a first source driving unit and a second source driving unit; the first source driving unit includes a first data voltage generating circuit, a first judgment circuit, and a first adjustment circuit; the second source driving unit includes a second data voltage generating circuit, a second judgment circuit, and a second adjustment circuit; the data voltage providing method further includes: When it is determined that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage provided by the first data voltage generating circuit is on a rising edge, and the second judgment circuit determines that the second data voltage provided by the second data voltage generating circuit is on a falling edge, the comparison circuit controls the first regulation circuit to adjust the rising edge driving current, and / or controls the second regulation circuit to adjust the falling edge driving current, until the comparison circuit determines that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage; When the comparison circuit determines that the grayscale change corresponding to the first source driving unit is consistent with the grayscale change corresponding to the second source driving unit, and the first judgment circuit determines that the first data voltage is on a falling edge, and the second judgment circuit determines that the second data voltage is on a rising edge, the comparison circuit controls the first regulation circuit to adjust the falling edge driving current, and / or controls the second regulation circuit to adjust the rising edge driving current, until the comparison circuit compares and obtains that the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

5. The data voltage providing method according to claim 4, wherein: When the grayscale corresponding to the data voltage rises and the data voltage is at a rising edge, the data voltage supply period includes a first stage, a second stage, and a third stage; and the data voltage supply method includes: In the first stage, the regulating circuit increases the rising edge driving current; In the second stage, the regulating circuit lowers the rising edge driving current; In the third stage, the regulating circuit increases the rising edge driving current.

6. The data voltage providing method according to claim 4, wherein: When the grayscale corresponding to the data voltage rises and the data voltage is at a falling edge, the data voltage supply period includes a first stage, a second stage, and a third stage; and the data voltage supply method includes: In the first stage, the regulating circuit lowers the falling edge driving current; In the second stage, the regulating circuit increases the falling edge driving current; In the third stage, the regulating circuit reduces the falling edge driving current.

7. The data voltage providing method according to claim 4, wherein: When the comparison circuit determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage rise, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit determines that the first data voltage is at a rising edge, and the second judgment circuit determines that the second data voltage is at a falling edge, the data voltage supply period includes a first stage, a second stage, and a third stage; The data voltage providing method includes: In the first stage, the comparison circuit controls the first regulation circuit to increase the rising edge drive current, and / or controls the second regulation circuit to decrease the falling edge drive current; In the second stage, the comparison circuit controls the first regulation circuit to lower the rising edge drive current, and / or controls the second regulation circuit to increase the falling edge drive current; In the third stage, the comparison circuit controls the first regulation circuit to increase the rising edge drive current, and / or controls the second regulation circuit to decrease the falling edge drive current; So that at the end of the third stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

8. The data voltage providing method according to claim 4, wherein: When the gray scale corresponding to the data voltage decreases and the data voltage is at a falling edge, the data voltage supply period includes a fourth stage, a fifth stage and a sixth stage; The data voltage providing method includes: In the fourth stage, the regulating circuit lowers the falling edge driving current; In the fifth stage, the regulating circuit increases the falling edge driving current; In the sixth stage, the regulating circuit reduces the falling edge driving current.

9. The data voltage providing method according to claim 4, wherein: When the gray scale corresponding to the data voltage decreases and the data voltage is at a rising edge, the data voltage supply period includes a fourth stage, a fifth stage and a sixth stage; The data voltage providing method includes: In the fourth stage, the regulating circuit increases the rising edge driving current; In the fifth stage, the regulating circuit lowers the rising edge driving current; In the sixth stage, the regulating circuit increases the rising edge driving current.

10. The data voltage providing method according to claim 4, wherein: When the comparison circuit determines that the grayscale corresponding to the first data voltage and the grayscale corresponding to the second data voltage decrease, and the grayscale change corresponding to the first data voltage and the grayscale change corresponding to the second data voltage are consistent, the first judgment circuit determines that the first data voltage is at a falling edge, and the second judgment circuit determines that the second data voltage is at a rising edge, the data voltage supply period includes a fourth stage, a fifth stage, and a sixth stage; The data voltage providing method includes: In the fourth stage, the comparison circuit controls the first regulation circuit to lower the falling edge drive current, and / or controls the second regulation circuit to increase the rising edge drive current; In the fifth stage, the comparison circuit controls the first regulation circuit to increase the falling edge drive current, and / or controls the second regulation circuit to decrease the rising edge drive current; In the sixth stage, the comparison circuit controls the first regulation circuit to lower the falling edge drive current, and / or controls the second regulation circuit to increase the rising edge drive current; So that at the end of the sixth stage, the voltage change value of the first data voltage is equal to the voltage change value of the second data voltage.

11. A display device, characterized in that: A display panel comprising a source driving circuit according to any one of claims 1 to 3; The display panel includes a plurality of pixels, and the source driving circuit is used to provide data voltages for the pixels.

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