Source driving circuit, data voltage providing method and display device

Abstract

The invention provides a source driving circuit, a data voltage providing method and a display device. The source electrode driving circuit comprises a plurality of source electrode driving units; the source electrode driving unit comprises a data voltage generating circuit, a judging circuit and an adjusting circuit; the judging circuit is electrically connected with the data voltage generating circuit and the adjusting circuit and is used for judging whether the data voltage provided by the data voltage generating circuit is located at a rising edge or a falling edge or not and controlling the adjusting circuit to adjust rising edge driving current or falling edge driving current according to a judging result; the data voltage generating circuit is electrically connected with the adjusting circuit and used for providing data voltage and adjusting the data voltage according to the rising edge driving current or the falling edge driving current. According to the invention, the phenomenon of line afterimage and H-Crosstalk (crosstalk) can be improved.

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 the related art, when the 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 drive 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 have poor H-Crosstalk when the light is turned on.

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

[0004] The current source driving circuit can only adjust the Slew rate of the data voltage of positive and negative polarities. When the Slew rate of the data voltage of a certain polarity is accelerated, the falling edge speed and the rising edge speed will both be accelerated. It is not compatible with the situation from high grayscale to low grayscale and the situation from low grayscale to high grayscale. 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 is unable to improve the line afterimage and H-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 phenomenon.

[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 unit comprises 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 used for providing a data voltage and regulating 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 used 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 phase input voltage and the negative phase input voltage and the voltage value of the data voltage.

[0012] The source driving circuit described in 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 regulating circuit, and the second source driving unit includes a second data voltage generating circuit, a second judgment circuit and a second regulating circuit;

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

[0015] The comparison circuit is used for, 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 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, by controlling the first adjustment circuit to adjust the rising edge driving current, and / or, by controlling the second adjustment circuit to adjust the falling 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. The comparison circuit is also used for, 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 at a falling edge, and the second judgment circuit determines that the second data voltage is at a rising edge, by controlling the first adjustment circuit to adjust the falling edge driving current, and / or, by controlling the second adjustment 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.

[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, and 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 adjust 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, and 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 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 regulating circuit to regulate the rising edge driving current, and / or controls the second regulating circuit to regulate the falling 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;

[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 at a falling edge, and the second judgment circuit determines that the second data voltage is at 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 gray scale 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:

[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 regulation circuit increases the rising edge drive current.

[0029] Optionally, when the gray scale 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:

[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 at a rising edge, and the second judgment circuit determines that the second data voltage is at a falling edge, the data voltage providing time period includes a first stage, a second stage and a third stage; the data voltage providing 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 gray scale corresponding to the data voltage decreases and the data voltage is at a falling edge, the data voltage providing period includes a fourth stage, a fifth stage and a sixth stage; and the data voltage providing 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 regulation circuit lowers the falling edge drive current.

[0042] Optionally, when the gray scale corresponding to the data voltage decreases and the data voltage is at a rising edge, the data voltage providing period includes a fourth stage, a fifth stage and a sixth stage; and the data voltage providing 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 at a falling edge, and the second judgment circuit determines that the second data voltage is at a rising edge, the data voltage providing time period includes a fourth stage, a fifth stage and a sixth stage; and the data voltage providing method includes:

[0047] In the fourth stage, the comparison circuit controls the first regulation circuit to lower the falling edge driving current, and / or controls the second regulation circuit to increase the rising edge driving 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 driving current, and / or controls the second regulation circuit to increase the rising edge driving 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, comprising the above-mentioned source driving circuit.

[0052] The source driving circuit, the data voltage providing method and the display device described in the embodiments of the present invention can improve the 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 follows Figure 1A The schematic diagram of the multi-line afterimage that appears when the afterimage image shown is switched to the grayscale image after a period of time;

[0055] Figure 1C In the related art, when the display is as follows 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 driving circuit according to at least one embodiment of the present invention;

[0057] Figure 3 is a structural diagram of a source driving 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 a first column data line S1 and a waveform diagram of a second data voltage on a second column data line S2 are shown;

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

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

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

[0062] The transistors used in all embodiments of the present invention may be thin film transistors or 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 called the first electrode and the other electrode is called 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 described in 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 judging 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 judging result;

[0066] The data voltage generating circuit 21 is electrically connected to the regulating circuit 23 , and is used for providing a data voltage and regulating 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 provided by the source driving unit changes, the judgment circuit 22 can be used to judge whether the data voltage is at a rising edge or a falling edge, and 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 the 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 then 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 , and the rising edge driving current and the falling edge driving current may be adjusted by controlling the current sources to adjust the voltage conversion rate of the data voltage.

[0070] In a specific implementation, the regulating circuit may contain a module capable of controlling 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 the CHPI protocol is adopted, 1T includes 10 bytes, which correspond to R data packets, G data packets or B data packets; the minimum action time division segment is set to 3 segments, corresponding to Figure 4B The common electrode voltage Vcom is pulled in three stages. Considering that the waveform of Vcom may change after adjusting a certain stage, the function division segment can be appropriately increased. The setting of this module can increase the idle Byte position in the Control management data of each current protocol for definition, and the control signal is 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, and the data voltage generating circuit is further used 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;

[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 phase input voltage and the negative phase 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 a positive input voltage and a negative input voltage; the judgment circuit judges whether the data voltage is at a rising edge or a falling edge based on a voltage difference between the positive input voltage and the negative input voltage, and a 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 in the figure, the data voltage generating circuit 21 includes a positive phase input terminal I1, a negative phase input terminal I2 and an output terminal S0, and the data voltage generating circuit is further used to generate and provide a data voltage to the output terminal S0 according to 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 used to judge whether the data voltage is at a rising edge or a falling edge according to the voltage difference between the positive phase input voltage and the negative phase input voltage and the 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 at 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 is judged that the data voltage is at a falling edge.

[0078] like Figure 4A As shown, in the related art, when the gray scale 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 drop speed of the second data voltage is faster than the rise 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 drop speed of the second data voltage is slower than the rise 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 293mV, and the voltage value of the second data voltage drops by 707mV. The drop speed of the second data voltage is faster than the rise speed of the first data voltage. The duration of the first stage T1 is 825ns. During this process, the common electrode voltage Vcom is pulled down by 200mV.

[0082] In the first stable stage T01, the voltage value of the first data voltage slowly rises to the target data voltage, and the second data voltage basically reaches a stable state, but at this time, Vcom cannot be pulled 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. 1 , a waveform diagram of the common electrode voltage Vcom is added.

[0085] Figure 2 , Figure 3 In at least one embodiment shown in FIG. 1 , when the gray scale 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] Therefore, 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 in FIG. 1 , when the gray scale 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] Therefore, 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 gray scale 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, Vcom cannot be pulled back upward.

[0100] Figure 2 , Figure 3 In at least one embodiment shown in FIG. 1 , when the gray scale corresponding to the data voltage decreases, for example, changes 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] Therefore, 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 in FIG. 1 , when the gray scale corresponding to the data voltage decreases, for example, changes 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] Therefore, 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 described in 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 adjustment circuit and the second adjustment circuit respectively;

[0113] The comparison circuit is used for, 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 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, by controlling the first adjustment circuit to adjust the rising edge driving current, and / or, by controlling the second adjustment circuit to adjust the falling 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. The comparison circuit is also used for, 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 at a falling edge, and the second judgment circuit determines that the second data voltage is at a rising edge, by controlling the first adjustment circuit to adjust the falling edge driving current, and / or, by controlling the second adjustment 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.

[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 a source driving circuit, and the source driving circuit may include a first source driving unit and a second source driving unit, and the polarity of a first data voltage provided by the first source driving unit may be opposite to the polarity of a 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 judges that the first data voltage provided by the first data voltage generating circuit is at a rising edge, and the second judgment circuit judges that the second data voltage provided by the second data voltage generating circuit is at a falling edge, the comparison circuit controls the first regulating circuit to regulate the rising edge driving current, and / or controls the second regulating circuit to regulate the falling 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;

[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 at a falling edge, and the second judgment circuit judges that the second data voltage is at 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 used 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 judging 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 judging result;

[0126] The second data voltage generating circuit 521 is electrically connected to the second regulating circuit 523, and is used for providing a second data voltage Vd2, and regulating 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 used for, 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 provided by the first data voltage generating circuit 511 is at a rising edge, and the second judgment circuit 522 determines that the second data voltage Vd2 provided by the second data voltage generating circuit 521 is at a falling edge, to control the first regulating circuit 513 to regulate the first rising edge driving current, and / or to control 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 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 at a falling edge, and the second judgment circuit 522 determines that the second data voltage Vd2 is at 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. 1 , 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 works 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 of the first source driving unit to a predetermined value. The comparison circuit 50 controls the first regulating circuit 513 to regulate 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 the falling edge and the second data voltage is at the 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 in FIG. 1 , 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 adjustment circuit 513 to increase the first rising edge driving current, and / or controls the second adjustment circuit 523 to decrease the second falling edge driving current;

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

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

[0136] 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, thereby eliminating Vcom pulling to solve the line afterimage and H-Crosstalk problems, and the driving current of each channel can be adaptively adjusted without manual debugging and setting.

[0137] Figure 5 In at least one embodiment shown in FIG. 1 , 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 adjustment circuit 513 to lower the first falling edge driving current, and / or controls the second adjustment circuit 523 to increase the second rising edge driving current;

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

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

[0141] 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, thereby eliminating Vcom pulling to solve the line afterimage and H-Crosstalk problems, and 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 adjust 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 the embodiment of the present invention, when the data voltage provided by the data voltage generating circuit changes, the judgment circuit can judge whether the data voltage is at a rising edge or a falling edge, and the adjustment circuit can adjust the rising edge driving current or the falling edge driving current according to the judgment result to improve the common electrode voltage pulling, thereby improving the 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, and 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 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 regulating circuit to regulate the rising edge driving current, and / or controls the second regulating circuit to regulate the falling 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;

[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 at a falling edge, and the second judgment circuit determines that the second data voltage is at 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 a source driving circuit, and the source driving circuit may include a first source driving unit and a second source driving unit, and the polarity of a first data voltage provided by the first source driving unit may be opposite to the polarity of a 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 judges that the first data voltage provided by the first data voltage generating circuit is at a rising edge, and the second judgment circuit judges that the second data voltage provided by the second data voltage generating circuit is at a falling edge, the comparison circuit controls the first regulating circuit to regulate the rising edge driving current, and / or controls the second regulating circuit to regulate the falling 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;

[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 at a falling edge, and the second judgment circuit judges that the second data voltage is at 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 gray scale 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 regulation circuit increases the rising edge drive current.

[0159] In at least one embodiment of the present invention, when the gray scale 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 at a rising edge, and the second judgment circuit determines that the second data voltage is at a falling edge, the data voltage providing time period includes a first stage, a second stage, and a third stage; the data voltage providing 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 gray scale corresponding to the data voltage decreases and the data voltage is at a falling edge, the data voltage providing period includes a fourth stage, a fifth stage and a sixth stage; and the data voltage providing 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 regulation circuit lowers the falling edge drive current.

[0172] In at least one embodiment of the present invention, when the gray scale corresponding to the data voltage decreases and the data voltage is at a rising edge, the data voltage providing period includes a fourth stage, a fifth stage and a sixth stage; and the data voltage providing 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 at a falling edge, and the second judgment circuit determines that the second data voltage is at a rising edge, the data voltage providing time period includes a fourth stage, a fifth stage, and a sixth stage; the data voltage providing method includes:

[0177] In the fourth stage, the comparison circuit controls the first regulation circuit to lower the falling edge driving current, and / or controls the second regulation circuit to increase the rising edge driving 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 driving current, and / or controls the second regulation circuit to increase the rising edge driving 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 described in 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 for providing 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 the scope of protection of the present invention.

Claims

1. A source driving circuit, characterized in that: It includes a plurality of source driving units; the source driving unit includes a data voltage generating circuit, a judging circuit and an adjusting 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 used for providing a data voltage and regulating the data voltage according to the rising edge driving current or the falling edge driving current.

2. The source driving circuit according to claim 1, wherein: The data voltage generating circuit comprises a positive phase input terminal, a negative phase input terminal and an output terminal, and the data voltage generating circuit is further used 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 phase input voltage and the negative phase input voltage and the voltage value of the data voltage.

3. The source driving circuit according to claim 2, wherein: Also 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 regulating circuit, and the second source driving unit includes a second data voltage generating circuit, a second judgment circuit and a second regulating circuit; The comparison circuit is electrically connected to the first judgment circuit, the second judgment circuit, the first adjustment circuit and the second adjustment circuit respectively; The comparison circuit is used for, 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 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, by controlling the first adjustment circuit to adjust the rising edge driving current, and / or, by controlling the second adjustment circuit to adjust the falling 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. The comparison circuit is also used for, 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 at a falling edge, and the second judgment circuit determines that the second data voltage is at a rising edge, by controlling the first adjustment circuit to adjust the falling edge driving current, and / or, by controlling the second adjustment 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.

4. The source driving circuit according to claim 3, characterized in that: The first source driving unit and the second source driving unit are adjacent source driving units.

5. The source driving circuit according to claim 2, wherein: The judgment circuit is used to judge that the data voltage is at 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 at 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.

6. A data voltage providing method, applied to the source driving circuit according to any one of claims 1 to 5, characterized in that: The data voltage providing method comprises: 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 adjust the rising edge driving current or the falling edge driving current according to the judging result; The data voltage generating circuit adjusts the data voltage according to the rising edge driving current or the falling edge driving current.

7. The data voltage providing method according to claim 6, wherein: 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 regulating circuit, and the second source driving unit includes a second data voltage generating circuit, a second judgment circuit and a second regulating 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 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 regulating circuit to regulate the rising edge driving current, and / or controls the second regulating circuit to regulate the falling 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; 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 at a falling edge, and the second judgment circuit determines that the second data voltage is at 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.

8. The data voltage providing method according to claim 6, wherein: When the gray scale 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: 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.

9. The data voltage providing method according to claim 6, wherein: When the gray scale 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: 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 regulation circuit lowers the falling edge driving current.

10. The data voltage providing method according to claim 7, 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 time period includes a first stage, a second stage, and a third stage; The data voltage providing method comprises: 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.

11. The data voltage providing method according to claim 6, 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 comprises: 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 lowers the falling edge driving current.

12. The data voltage providing method according to claim 6, 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 comprises: 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.

13. The data voltage providing method according to claim 7, 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 time period includes a fourth stage, a fifth stage, and a sixth stage; The data voltage providing method comprises: In the fourth stage, the comparison circuit controls the first regulation circuit to lower the falling edge driving current, and / or controls the second regulation circuit to increase the rising edge driving 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 driving current, and / or controls the second regulation circuit to increase the rising edge driving 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.

14. A display device, characterized in that: A display panel comprising a source driving circuit as claimed in any one of claims 1 to 5; The display panel includes a plurality of pixels, and the source driving circuit is used for providing data voltages for the pixels.

Images