Display driving circuit, driving method thereof, display driving chip and display device

Abstract

The invention provides a display driving circuit, a driving method thereof, a display driving chip and a display device, and belongs to the technical field of display. In the circuit, a signal selection part can alternately select a positive polarity voltage provided by a positive polarity voltage supply part and a negative polarity voltage provided by a negative polarity voltage supply part in different periods of time, and transmits the same polarity voltage selected in the same period of time to two pixels of the same color. The two pixels alternately receive positive and negative polarity voltages in different time periods, and any pixel only receives the positive polarity voltage or the negative polarity voltage at any moment. Namely, the display driving circuit not only can realize polarity reversal driving, avoid polarization of liquid crystal molecules and ensure a better display effect, but also can always provide required positive polarity voltage or negative polarity voltage for different pixels with the same color, so that the display effect is better when polarity reversal is realized. The variation amplitude and the frequency of the voltage provided by each voltage providing part are small, so that the generated power consumption is correspondingly small.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display driving circuit and a driving method thereof, a display driving chip, and a display device. Background Art

[0002] A display driving circuit is one of the essential circuits for driving a display panel in a display device to display images. The display device is, for example, a common liquid crystal display (LCD).

[0003] Currently, for LCDs, display driver circuits typically apply a driving voltage to the liquid crystal molecules in a pixel, driving the deflection of the liquid crystal molecules, allowing light to pass through the color filter located on one side of the pixel and exit, thus achieving display. Furthermore, to prevent polarization of the liquid crystal molecules caused by the driving voltage remaining unidirectional for a long period of time (i.e., being greater than or less than 0 for a long period of time), the display driver circuit typically also periodically changes the polarity of the driving voltage applied to each pixel, alternating between positive and negative voltages at different times to achieve polarity reversal. However, polarity reversal increases the power consumption of the display driver circuit. Summary of the Invention

[0004] This application provides a display driver circuit and its driving method, a display driver chip, and a display device, which can solve the technical problem of high power consumption when the display driver circuit implements polarity reversal in the related art. The technical solution is as follows:

[0005] In one aspect, a display driver circuit is provided for driving a plurality of pixels of multiple colors in a display panel to emit light. The display driver circuit comprises: a plurality of groups of signal supply units and a plurality of groups of signal selection units, each group of the signal supply units being connected to a corresponding signal selection unit, each group of the signal selection units being further connected to at least one group of pixels, each group of pixels comprising two pixels of the same color, and each group of the signal supply units comprising: a positive polarity voltage supply unit and a negative polarity voltage supply unit corresponding to each group of pixels;

[0006] The positive polarity voltage providing unit is used to: provide a positive polarity voltage;

[0007] The negative polarity voltage providing unit is used to: provide a negative polarity voltage;

[0008] The signal selection unit is used to: receive a polarity control signal, and in response to the polarity control signal, select the positive polarity voltage to be transmitted to the two pixels of the same color at different time periods, and select the negative polarity voltage to be transmitted to the two pixels of the same color at different time periods, and in the same time period, the voltage transmitted to the same pixel is the positive polarity voltage or the negative polarity voltage.

[0009] Optionally, each group of the signal selection units is connected to a group of pixels, each group of pixels includes two adjacent pixels of the same color, and the pixels connected to adjacent signal selection units have different colors.

[0010] Optionally, the plurality of pixels are arranged in an array;

[0011] The potential of the polarity control signal changes once per row or once per frame; wherein the change refers to a change from a first potential to a second potential, and the first potential is greater than the second potential.

[0012] Optionally, the signal selection unit includes: an output multiplexer;

[0013] The input port of the output multiplexer is connected to the signal providing unit, the output port of the output multiplexer is connected to the pixel, and the control port of the output multiplexer is used to receive the polarity control signal;

[0014] The output multiplexer is used to: in response to the polarity control signal, control the positive polarity voltage supply unit to be respectively turned on with the two pixels of the same color at different time periods, so as to select the positive polarity voltage to be transmitted to the two pixels of the same color at different time periods, and control the negative polarity voltage supply unit to be respectively turned on with the two pixels of the same color at different time periods, so as to select the negative polarity voltage to be transmitted to the two pixels of the same color at different time periods, and in the same time period, control the positive polarity voltage supply unit or the negative polarity voltage supply unit to be turned on with the same pixel, so that the voltage transmitted to the same pixel is the positive polarity voltage or the negative polarity voltage.

[0015] Optionally, the positive polarity voltage providing unit includes: a digital-to-analog converter and an operational amplifier;

[0016] The digital-to-analog converter is used to: receive a positive polarity grayscale voltage, convert the positive polarity grayscale voltage from a digital signal to an analog signal, and then transmit the analog signal to the operational amplifier;

[0017] The operational amplifier is used to amplify the received positive polarity grayscale voltage into the positive polarity voltage and then transmit the amplified voltage to the signal selection unit.

[0018] Optionally, the negative polarity voltage providing unit includes: a digital-to-analog converter and an operational amplifier;

[0019] The digital-to-analog converter is used to: receive a negative polarity grayscale voltage, convert the negative polarity grayscale voltage from a digital signal to an analog signal, and then transmit the analog signal to the operational amplifier;

[0020] The operational amplifier is used to amplify the received negative polarity grayscale voltage into the negative polarity voltage and then transmit the amplified voltage to the signal selection unit.

[0021] Optionally, the display driving circuit further includes: a driving unit;

[0022] The driving unit is connected to the digital-to-analog converter in the positive polarity voltage providing unit and the digital-to-analog converter in the negative polarity voltage providing unit;

[0023] The driving section is configured to provide a positive polarity grayscale voltage to the digital-to-analog converter in the positive polarity voltage providing section, and to provide a negative polarity grayscale voltage to the digital-to-analog converter in the negative polarity voltage providing section.

[0024] Optionally, the display driving circuit further includes: a control unit;

[0025] The control unit is connected to the signal selection unit;

[0026] The control unit is configured to provide the polarity control signal to the signal selection unit.

[0027] In another aspect, a driving method for a display driving circuit is provided, which is applied to a signal selection unit included in the display driving circuit according to the first aspect above; the method comprises:

[0028] In a first time period, a polarity control signal of a first potential is received, and in response to the polarity control signal of the first potential, a positive polarity voltage provided by a positive polarity voltage supply unit is selected to be transmitted to one of two pixels of the same color, and a negative polarity voltage provided by a negative polarity voltage supply unit is selected to be transmitted to the other of the two pixels of the same color;

[0029] In a second period, receiving a polarity control signal of a second potential, and in response to the polarity control signal of the second potential, selecting the negative polarity voltage provided by the negative polarity voltage providing unit to be transmitted to the one pixel, and selecting the positive polarity voltage provided by the positive polarity voltage providing unit to be transmitted to the other pixel;

[0030] The first potential is greater than the second potential.

[0031] In yet another aspect, a display driver chip is provided, comprising: the display driver circuit as described in the above aspect.

[0032] In another aspect, a display device is provided, comprising: a display panel, and the display driver chip according to the above-mentioned further aspect;

[0033] The display panel includes a plurality of pixels of multiple colors, and the display driving chip includes a display driving circuit connected to the plurality of pixels and configured to drive the plurality of pixels to emit light.

[0034] In summary, the technical solution provided by this application can at least bring the following beneficial effects:

[0035] A display driver circuit and its driving method, a display driver chip, and a display device are provided. In the display driver circuit, a signal selection unit, under the control of a received polarity control signal, can alternately select the positive polarity voltage provided by the positive polarity voltage supply unit and the negative polarity voltage provided by the negative polarity voltage supply unit in time periods, and transmit the same polarity voltage selected in the same time period to two pixels of the same color, respectively. This allows the two pixels of the same color to alternately receive positive and negative polarity voltages in different time periods, and at any given moment, each pixel receives only positive polarity voltage or negative polarity voltage. In other words, the display driver circuit can not only implement polarity reversal driving to avoid polarization of liquid crystal molecules and ensure a good display effect, but also consistently provide the required positive polarity voltage or negative polarity voltage to different pixels of the same color. This allows the voltage variation amplitude and frequency provided by each voltage supply unit to be small when polarity reversal is implemented, and thus the power consumption generated by the display driver circuit is also correspondingly small. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 This is a schematic diagram of a dot inversion driving method provided in an embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of a column inversion driving method provided by an embodiment of the present application;

[0039] Figure 3 This is a structural diagram of a display panel and a display driving circuit provided in an embodiment of the present application;

[0040] Figure 4 This is a schematic structural diagram of a display driving circuit provided in an embodiment of the present application;

[0041] Figure 5 This embodiment of the present application is Figure 4 A schematic diagram of the working principle of a display driving circuit is shown based on FIG.

[0042] Figure 6is a structural diagram of another display driving circuit provided in an embodiment of the present application;

[0043] Figure 7 This embodiment of the present application is Figure 6 A schematic diagram of the working principle of a signal selection unit is shown on the basis;

[0044] Figure 8 This embodiment of the present application is Figure 6 A schematic diagram of the working principle of a display driving circuit is shown based on FIG.

[0045] Figure 9 This embodiment of the present application is Figure 6 Another schematic diagram of the working principle of the display driving circuit shown on the basis;

[0046] Figure 10 This is a schematic diagram of the working principle of a display driving circuit of the prior art provided by an embodiment of the present application;

[0047] Figure 11 This is a schematic diagram of the working principle of another prior art display driving circuit provided by an embodiment of the present application;

[0048] Figure 12 This is a signal simulation schematic diagram provided by an embodiment of the present application;

[0049] Figure 13 This is a flow chart of a driving method for a display driving circuit provided in an embodiment of the present application;

[0050] Figure 14 This is a schematic structural diagram of a display driver chip provided in an embodiment of the present application;

[0051] Figure 15 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0053] It is understood that for LCDs, the display driver circuit applying a driving voltage to the liquid crystal molecules in the pixel can refer to: applying voltages to the pixel electrode and the common electrode at both ends of the liquid crystal molecules, respectively, to form a voltage difference between the pixel electrode and the common electrode, and this voltage difference drives the liquid crystal molecules to deflect. On this basis, the applied driving voltage remains unidirectional for a long time, which means that the voltage difference between the voltage applied to the pixel electrode (also known as the pixel voltage) and the voltage applied to the common electrode (also known as the common voltage) remains positive for a long time, also known as the pixel voltage is higher than the applied common voltage for a long time; or, the voltage difference between the pixel voltage and the common voltage remains negative for a long time, also known as the pixel voltage is lower than the common voltage for a long time. This situation will cause the liquid crystal molecules to polarize. Polarization refers to the physical phenomenon that under the action of an electric field, the internal charge distribution of the liquid crystal molecules shifts, forming a dipole moment or causing the original dipole moment to be oriented. This polarization phenomenon will cause the liquid crystal molecules to respond slowly when the display panel switches the display screen, and the liquid crystal molecules cannot change their arrangement state in time, which will further cause the previous image to remain on the display panel, resulting in display problems such as afterimages and smearing. In addition, after long-term use, the liquid crystal molecules even find it difficult to restore their original response characteristics, and permanent defects appear on the display panel, which also greatly shortens the service life.

[0054] Based on this, in some embodiments, it is considered to set the display driving circuit to drive the liquid crystal molecules in a polarity reversal manner. Polarity reversal refers to: periodically changing the polarity of the driving voltage applied to the liquid crystal molecules so that the driving voltage is continuously switched between a positive polarity voltage (i.e., a voltage greater than 0 or a pixel voltage greater than a common voltage) and a negative polarity voltage (i.e., a voltage less than 0 or a pixel voltage less than a common voltage). In this way, it is possible to ensure that the liquid crystal molecules will not be polarized due to the continuous action of a single-direction electric field during long-term operation, and at the same time, the polarization performance of the liquid crystal molecules can be maintained to be relatively stable, thereby improving problems such as poor display and short service life. Generally, the common voltage is fixed, and the display driving circuit can achieve polarity reversal by changing the size of the pixel voltage. In addition, the display driving circuit is generally connected to the pixel electrodes in multiple columns of pixels through multiple data lines to provide pixel voltages to each pixel electrode. One data line can correspond to a transmission channel, referred to as a channel.

[0055] For example, reference Figure 1 In some embodiments, the display driving circuit can be driven by a dot inversion method. Alternatively, refer to Figure 2In some embodiments, the display driving circuit can be driven by column inversion. Wherein, dot inversion means that when each frame is displayed, the driving voltage polarity applied to the liquid crystal molecules in any two adjacent (upper, lower, left, and right) pixels is opposite. Accordingly, in the case of multiple rows and columns of pixels, the positive polarity voltage and the negative polarity voltage can be switched according to the behavior cycle. Column inversion means that when each frame is displayed, the driving voltage polarity applied to the liquid crystal molecules in any two adjacent columns of pixels is opposite, and the driving voltage polarity applied to the liquid crystal molecules in the same column of pixels is the same. Accordingly, in the case of multiple rows and columns of pixels, the positive polarity voltage and the negative polarity voltage can be switched according to the frame cycle.

[0056] It is understandable that Figure 1 and Figure 2 The display conditions of the Nth and N+1th frames are schematically shown, with "+" representing a positive polarity voltage and "-" representing a negative polarity voltage. Based on the above description of the inversion method, it can be seen that the frequency of positive and negative voltage polarity reversal under dot inversion is significantly higher than that under column inversion, and the magnitude of the positive and negative voltage changes under dot inversion is generally higher than that under column inversion. It can also be seen that the polarization improvement effect under dot inversion is significantly better than that under column inversion, that is, the display effect of dot inversion drive is better than that of column inversion drive. However, dot inversion results in higher power consumption compared to column inversion.

[0057] Based on this, in some embodiments, a zigzag (ZIGZAG) driving technology is also introduced, which can realize the driving effect of dot reversal with the driving mode of column reversal, both ensuring display effect and reducing power consumption. However, this driving technology needs to adopt a dedicated Z structure panel, which is relatively limited. Wherein, the Z structure panel refers to: the zigzag structure panel on two data lines on both sides of which the staggered connection of each column of pixels is positioned, and each column of pixels is used to receive the pixel voltage provided by the two data lines respectively for display driver circuits. In the traditional structure panel of non-Z structure, each column of pixels is generally connected to the same data line to receive the pixel voltage provided by the data line for display driver circuits.

[0058] In addition, current display driver circuits typically provide the required positive or negative voltage to pixels of different colors through a single channel. Because the voltages required by pixels of different colors generally differ significantly, when current display driver circuits implement polarity inversions such as dot inversion or column inversion, the voltage variation amplitude and frequency provided by each channel are both relatively large, which also results in higher power consumption generated by the display driver circuit.

[0059] Specifically, in the LCD driving process, the current dot inversion drive method can significantly improve display quality, but it also comes with higher power consumption. The current column inversion drive method, while relatively low in power consumption, is insufficient in improving display quality. The current ZIGZAG drive method, while both low in power consumption and significantly improving display quality, is relatively limited and has limited applicability. Furthermore, due to the current connection method, the voltage provided by the display driver circuit through each channel varies significantly in amplitude and frequency, resulting in unavoidable high power consumption.

[0060] Based on this, an embodiment of the present application provides a display driving circuit, which can combine the low power consumption of column inversion driving and the excellent display effect provided by dot inversion driving, that is, the improved effect of dot inversion is achieved with the low power consumption of column inversion, and the circuit can be applied to various types of display panels, with wider applicability and economy, and the voltage change amplitude and frequency provided by the circuit through each channel can be small, thereby solving the problem of high power consumption from the voltage change level.

[0061] First, it is understandable that, combined with Figure 3 It can be seen that the display driving circuit 00 can be used to drive a plurality of pixels including a plurality of colors in the display panel 10 to emit light. For example, Figure 3 , which are red (red, referred to as R), green (green, referred to as G) and blue (blue, referred to as B). Figure 3 It can be seen that a plurality of pixels can be arranged in an array of rows and columns, that is, the display panel 10 may include a plurality of rows and columns of pixels. The display driving circuit 00 can be connected to a plurality of columns of pixels in a one-to-one correspondence through a plurality of data lines Data, that is, the display driving circuit 00 can be connected to a corresponding column of pixels through a data line Data, and can be connected to different columns of pixels through different data lines Data. Of course, this is not limited to a one-to-one correspondence. For example, in some other embodiments, the display driving circuit 00 can be connected to at least two columns of pixels through a data line Data. Also, it is not limited to an array arrangement, for example, a plurality of pixels can also be arranged in other ways. It is also not limited to the above three colors, for example, white pixels can also be included.

[0062] Secondly, combined Figure 4 It can be seen that the display driving circuit 00 includes: multiple groups of signal supply units 01 and multiple groups of signal selection units 02 corresponding to each other, each group of signal supply units 01 is connected to the corresponding signal selection unit 02, each group of signal selection units 02 is also connected to at least one group of pixels, each group of pixels includes two pixels of the same color, and each group of signal supply units 01 includes: a positive polarity voltage supply unit 011 and at least one negative polarity voltage supply unit 012 corresponding to each group of pixels.

[0063] The positive polarity voltage providing unit 011 is used to provide a positive polarity voltage V+. Figure 4 In FIG. 1 , the signal provided by the positive polarity voltage providing unit 011 is identified as S1 , where S1 = V+.

[0064] The negative polarity voltage providing unit 012 is used to provide a negative polarity voltage V−. Figure 4 In FIG, the signal provided by the negative polarity voltage providing unit 012 is identified as S2, where S2 = V-.

[0065] The signal selection unit 02 is used to: receive the polarity control signal POL, and in response to the polarity control signal POL, select the positive polarity voltage V+ (i.e., signal S1) to be transmitted to two pixels of the same color at different time periods, and select the negative polarity voltage V- (i.e., signal S2) to be transmitted to two pixels of the same color at different time periods, and in the same time period, the voltage transmitted to the same pixel is the positive polarity voltage V+ or the negative polarity voltage V-.

[0066] For example, Figure 4 Only a corresponding set of signal providing units 01 and signal selecting units 02 are shown schematically, and the signal selecting unit 02 shown is connected to a group of pixels, and the group of pixels includes two red pixels R located in the first column and the fourth column (respectively shown as red pixel 1 and red pixel 2), and the first row can be taken as an example here.

[0067] For example, in Figure 4 On this basis, combined with Figure 5It can be seen that when the potential of the polarity control signal POL is a high potential (i.e., POL=H), the signal selection unit 02 can select the signal S1 provided by the positive polarity voltage providing unit 011, that is, the positive polarity voltage V+ is transmitted to the red pixel R located in the first column (i.e., red pixel 1), so that the driving voltage applied to the liquid crystal molecules in the red pixel 1 is greater than 0 (marked as R+), and at the same time can select the signal S2 provided by the negative polarity voltage providing unit 012, that is, the negative polarity voltage V- is transmitted to the red pixel R located in the fourth column (i.e., red pixel 2), so that the driving voltage applied to the liquid crystal molecules in the red pixel 2 is less than 0 (marked as R-). When the potential of the polarity control signal POL is low (i.e., POL=L), the signal selection unit 02 can select the signal S2 provided by the negative polarity voltage providing unit 012, that is, the negative polarity voltage V-, to be transmitted to the red pixel 1, so that the driving voltage applied to the liquid crystal molecules in the red pixel 1 is less than 0 (marked as R-), and at the same time, the signal S1 provided by the positive polarity voltage providing unit 011, that is, the positive polarity voltage V+, can be selected to be transmitted to the red pixel 2, so that the driving voltage applied to the liquid crystal molecules in the red pixel 2 is greater than 0 (marked as R+). In this way, polarity reversal is achieved. On this basis, the potential of the polarity control signal POL can be flexibly set to achieve Figure 1 It is understood that the high potential and low potential described in the embodiments of the present application are relative, the high potential is also called the first potential, and the low potential is also called the second potential.

[0068] Optionally, in some embodiments, in order to achieve dot inversion or column inversion, the signal providing unit 01 and the signal selecting unit 02 may cooperate to select a positive polarity voltage V+ or a negative polarity voltage V-. However, at present, one signal selecting unit 02 is connected to different color pixels in adjacent columns (e.g., a red pixel R located in the first column and a green pixel G located in the second column). Accordingly, the positive polarity voltage providing unit 011 corresponding to the one signal selecting unit 02 needs to provide the required positive polarity voltage V+ to the red pixel R and the green pixel G (i.e., pixels of different colors), and the negative polarity voltage providing unit 012 is the same and will not be repeated. That is, as previously described, the current display driving circuit needs to provide the required positive polarity voltage V+ or negative polarity voltage V- to each pixel of different colors through a channel. In the embodiment of the present application, since one signal unit 02 is connected to pixels of the same color (e.g., Figure 4As shown, the red pixel 1 and the red pixel 2 are connected. Therefore, the positive polarity voltage supply unit 011 corresponding to the signal selection unit 02 always provides the required positive polarity voltage V+ to the same color pixel (e.g., the red pixel). The negative polarity voltage supply unit 012 is similar and will not be described in detail. In other words, the display driver circuit described in the embodiment of the present application provides the required positive polarity voltage V+ or negative polarity voltage V- to each pixel of the same color through a single channel.

[0069] It is understandable that the voltage difference required between different pixels of the same color is small or even the same, while the voltage difference required between different pixels of different colors is large. Therefore, it can be seen that when achieving polarity reversal, the display driver circuit provided by each signal providing unit 01 in the embodiment of the present application has a smaller voltage change amplitude and a lower frequency of change than the current display driver circuit, and thus the power consumption generated is relatively small. Therefore, it can be seen that the display driver circuit provided by the embodiment of the present application can not only achieve inversion modes such as point inversion and column inversion, avoiding polarization of liquid crystal molecules due to continuous exposure to a single-directional electric field, thereby improving the display effect, but also, compared with the current circuit, the power consumption generated can be smaller, and no dedicated Z-structure panel is required, and the scope of application is also relatively wide.

[0070] In summary, an embodiment of the present application provides a display driver circuit. In particular, a signal selection unit, under the control of a received polarity control signal, can alternately select the positive polarity voltage provided by the positive polarity voltage supply unit and the negative polarity voltage provided by the negative polarity voltage supply unit in time periods, and transmit the same polarity voltage selected in the same time period to two pixels of the same color, respectively, so that the two pixels of the same color can alternately receive positive and negative polarity voltages in different time periods, and at any moment, any pixel only receives a positive polarity voltage or a negative polarity voltage. That is, the display driver circuit can not only achieve polarity reversal drive, avoid polarization of liquid crystal molecules, and ensure a better display effect, but also can always provide the required positive polarity voltage or negative polarity voltage to different pixels of the same color, so that when polarity reversal is achieved, the voltage variation amplitude and frequency provided by each voltage supply unit are small, and thus the power consumption generated by the display driver circuit is also correspondingly small.

[0071] Optionally, combined Figure 4 and Figure 6 Each group of signal selection units 02 can be connected to a group of pixels. Each group of pixels can include two adjacent pixels of the same color, and the pixels connected to adjacent signal selection units 02 can be different colors. That is, each group of signal selection units 02 can be connected to two adjacent pixels of the same color, and adjacent signal selection units 02 can be connected to two groups of pixels of different colors. This facilitates wiring and layout.

[0072] It is understandable that the two pixels of the same color are not strictly adjacent here, but are adjacent for the same color based on the pixel arrangement. Figure 4 and Figure 6 The two adjacent red pixels R connected to the signal selection unit 02 may be two adjacent pixels located in the first column and the fourth column, rather than two adjacent pixels located in the first column and the second column. The two pixels located in the first column and the second column are pixels of different colors: a red pixel R and a green pixel G.

[0073] Optionally, in combination with the above records and Figure 3 It can be seen that the multiple pixels described in the embodiment of the present application can be arranged in an array. On this basis, the potential of the polarity control signal POL can jump once per row or once per frame.

[0074] Here, the transition refers to a transition from a first potential to a second potential, where the first potential is greater than the second potential. That is, the first potential is the high potential H mentioned above, and the second potential is the low potential L mentioned above.

[0075] It can be understood that, based on the potential of the polarity control signal POL jumping once per row, the polarities of any two adjacent pixels can be made opposite, which can achieve Figure 1 The dot inversion drive shown in the figure is as follows. Based on the potential of the polarity control signal POL jumping once per frame, the polarities of any two adjacent columns of pixels can be made opposite, which can be achieved. Figure 2 The column inversion drive shown is shown. Of course, it is not limited to this.

[0076] Optionally, combined Figure 6 It can also be seen that the signal selection unit 02 may include: an output multiplexer (Output Multiplexer) OMUX.

[0077] An input port of the output multiplexer OMUX is connected to the signal provider, an output port of the output multiplexer OMUX is connected to the pixel, and a control port of the output multiplexer OMUX is used to receive a polarity control signal.

[0078] The output multiplexer OMUX is used to: respond to the polarity control signal POL, control the positive polarity voltage supply unit 011 to be turned on with two pixels of the same color at different time periods, so as to select the positive polarity voltage V+ to be transmitted to the two pixels of the same color at different time periods, and control the negative polarity voltage supply unit 012 to be turned on with the two pixels of the same color at different time periods, so as to select the negative polarity voltage V- to be transmitted to the two pixels of the same color at different time periods, and in the same time period, control the positive polarity voltage supply unit 011 or the negative polarity voltage supply unit 012 to be turned on with the same pixel, so that the voltage transmitted to the same pixel is the positive polarity voltage V+ or the negative polarity voltage V-.

[0079] For example, combined with Figure 6 and Figure 7 In the case where a signal selection unit 02 is connected to two pixels of the same color, the output multiplexer OMUX can have two input ports, two output ports, and one control port. The two input ports can be connected to the positive polarity voltage providing unit 011 and the negative polarity voltage providing unit 012, respectively, to receive the positive polarity voltage V+ and the negative polarity voltage V-. The two output ports are respectively connected to two pixels of the same color (e.g., red pixel 1 and red pixel 2) to select the positive polarity voltage V+ and the negative polarity voltage V- to be output to the two pixels of the same color. One control port is used to receive the polarity control signal POL. Figure 7 In the figure, the two input ports of the output multiplexer OMUX are labeled SI1 and SI2, and the two output ports of the output multiplexer OMUX are labeled SO1 and SO2. A positive polarity voltage or a positive polarity signal can be input through the input port SI1, and a negative polarity voltage or a negative polarity signal can be input through the input port SI2. When the potential of the polarity control signal POL is a high potential H, the input port SI1 can be controlled to be connected to the output port SO1, and the input port SI2 can be controlled to be connected to the output port SO2, so that the positive polarity signal from the input port SI1 is output to the connected pixel (e.g., red pixel 1) through the output port SO1, that is, SO1=SI1 at this time; and the positive polarity signal from the input port SI2 is output to the connected pixel (e.g., red pixel 2) through the output port SO2, that is, SO2=SI2 at this time. When the potential of the polarity control signal POL is a low potential L, the input port SI1 can be controlled to be connected to the output port SO2, and the input port SI2 can be controlled to be connected to the output port SO1, so as to output the negative polarity signal from the input port SI2 to the connected pixel (e.g., red pixel 1) through the output port SO1, that is, SO1=SI2 at this time; and the positive polarity signal from the input port SI1 is output to the connected pixel (e.g., red pixel 2) through the output port SO2, that is, SO2=SI1 at this time.

[0080] Optionally, continue combining Figure 6 It can be seen that the positive polarity voltage providing unit 011 may include: a digital-to-analog converter (DAC) and an operational amplifier (OP-AMP), which are marked as DAC and Amp respectively.

[0081] The digital-to-analog converter DAC can be used to receive a positive polarity grayscale voltage, convert the positive polarity grayscale voltage from a digital signal into an analog signal, and then transmit the analog signal to the operational amplifier Amp.

[0082] The operational amplifier Amp can be used to amplify the received positive polarity grayscale voltage into a negative polarity voltage and then transmit the voltage to the signal selection unit 02 .

[0083] Optionally, continue combining Figure 6 It can be seen that, similarly, the negative polarity voltage providing unit 012 may also include: a digital-to-analog converter DAC and an operational amplifier Amp.

[0084] The digital-to-analog converter DAC can be used to receive a negative grayscale voltage, convert the negative grayscale voltage from a digital signal into an analog signal, and then transmit the analog signal to the operational amplifier Amp.

[0085] The operational amplifier Amp can be used to amplify the received negative grayscale voltage into a negative voltage and then transmit the voltage to the signal selection unit.

[0086] That is, in the display driver circuit, the digital-to-analog converter DAC can convert the received grayscale voltage from a digital signal into an analog voltage that conforms to the display gamma (GMMA) curve to ensure the accuracy of the display effect. The operational amplifier Amp can be used as an output buffer circuit to output a larger current and improve the driving load capacity. The output multiplexer OMUX can be used as an output selection module to control the corresponding relationship between input and output. For example, the control input and output meet Figure 7 The corresponding relationship shown.

[0087] Optionally, on the basis of a display panel including a plurality of pixels of three colors, namely, red pixel R, green pixel G and blue pixel B, the display driving circuit is combined with Figure 6Three groups of signal selection units 02, such as three output multiplexers OMUX, can be provided, with six pixels as a group. Accordingly, three groups of signal supply units 01 can be provided, corresponding one-to-one to the three groups of signal selection units 02. Each group of signal selection units 02 is connected to two adjacent pixels of the same color. Accordingly, each group of signal supply units 01 can include one positive polarity voltage supply unit 011 and one negative polarity voltage supply unit 012. For three groups of signal supply units 01, three positive polarity voltage supply units 011 and three negative polarity voltage supply units 012 can be included. Furthermore, both the positive polarity voltage supply unit 011 and the negative polarity voltage supply unit 012 can include a digital-to-analog converter DAC and an operational amplifier Amp, which are sequentially connected to the output multiplexer OMUX.

[0088] To distinguish, Figure 6 In FIG, the three output multiplexers OMUX connected to the red pixel R, the green pixel G, and the blue pixel B are labeled OMUX1, OMUX2, and OMUX3, respectively. The digital-to-analog converters DAC included in the positive polarity voltage supply unit 011 and the negative polarity voltage supply unit 012 are labeled VH-DAC and VL-DAC, and the operational amplifiers Amp included in the positive polarity voltage supply unit 011 and the negative polarity voltage supply unit 012 are labeled VH Amp and VL Amp, where VH represents a positive polarity voltage and VL represents a negative polarity voltage. In addition, Figure 6 The three signal supply units 01 shown include three VH-DACs and three VL-DACs, arranged alternately from left to right. The three VH amps connected to the three VH-DACs are labeled VH Amp1, VH Amp2, and VH Amp3, respectively; the three VL amps connected to the three VL-DACs are labeled VL Amp1, VL Amp2, and VL Amp3, respectively.

[0089] On this basis, it can be seen that Figure 6 In terms of the structure shown, VH Amp1 and VL Amp2 can belong to a group of signal providing units 01, connected to OMUX1, that is, controlled by OMUX1, and jointly drive two adjacent red pixels R, which are marked as red pixel 1 and red pixel 2 for distinction. VH Amp3 and VL Amp1 can belong to a group of signal providing units 01, connected to OMUX2, controlled by OMUX2, and jointly drive two adjacent blue pixels B, which are marked as blue pixel 1 and blue pixel 2 for distinction. VH Amp2 and VL Amp3 can belong to a group of signal providing units 01, connected to OMUX3, controlled by OMUX3, and jointly drive two adjacent green pixels G, which are marked as green pixel 1 and green pixel 2 for distinction. Figure 2, the two red pixels R may refer to pixels located in the first and fourth columns respectively; the two green pixels G may refer to pixels located in the second and fifth columns respectively; the two blue pixels B may refer to pixels located in the third and sixth columns respectively, and the first row is taken as an example here.

[0090] for Figure 6 , combined with Figure 8 and Figure 9 The working principle of the display driving circuit described in the embodiment of the present application is described as follows:

[0091] First, combine Figure 8 and Figure 9 It can be seen that for two adjacent red pixels 1 and 2, the signal S1 output by VHAmp1 and the signal S4 output by VL Amp2 can be used as the input of OMUX1 and transmitted to OMUX1. Among them, the signal S1 can be a positive polarity voltage V+, and the signal S4 can be a negative polarity voltage V-. When the potential of the polarity control signal POL is high, that is, POL=H, combined with Figure 8 It can be seen that OMUX1 can select the output signal S1 to red pixel 1 and select the output signal S4 to red pixel 2, so that the positive polarity voltage V+ is transmitted to red pixel 1 to drive red pixel 1 to emit light, and the negative polarity voltage V- is transmitted to red pixel 2 to drive red pixel 2 to emit light. When the potential of the polarity control signal POL is low, that is, POL=L, combined with Figure 9 It can be seen that OMUX1 can select the output signal S4 to the red pixel 1, and select the output signal S1 to the red pixel 2, so that the positive polarity voltage V+ is transmitted to the red pixel 2 to drive the red pixel 2 to emit light, and the negative polarity voltage V- is transmitted to the red pixel 1 to drive the red pixel 1 to emit light.

[0092] Similarly, for two adjacent green pixels 1 and 2, the signal S5 output by VH Amp3 and the signal S2 output by VLAmp1 can be used as the input of OMUX2 and transmitted to OMUX2. Among them, the signal S5 can be a positive polarity voltage V+, and the signal S2 can be a negative polarity voltage V-. When the potential of the polarity control signal POL is high, that is, POL=H, combined with Figure 8 It can be seen that OMUX2 can select the output signal S2 to green pixel 1 and select the output signal S5 to green pixel 2, so that the positive polarity voltage V+ is transmitted to green pixel 2 to drive green pixel 2 to emit light, and the negative polarity voltage V- is transmitted to green pixel 1 to drive green pixel 1 to emit light. When the potential of the polarity control signal POL is low, that is, POL=L, combined with Figure 9It can be seen that OMUX2 can select the output signal S5 to green pixel 1 and select the output signal S2 to green pixel 2, so that the positive polarity voltage V+ is transmitted to green pixel 1 to drive green pixel 1 to emit light, and the negative polarity voltage V- is transmitted to green pixel 2 to drive green pixel 2 to emit light.

[0093] Similarly, for two adjacent blue pixels 1 and 2, the signal S3 output by VH Amp2 and the signal S6 output by VLAmp3 can be used as the input of OMUX3 and transmitted to OMUX3. Among them, the signal S3 can be a positive polarity voltage V+, and the signal S6 can be a negative polarity voltage V-. When the potential of the polarity control signal POL is high, that is, POL=H, combined with Figure 8 It can be seen that OMUX3 can select the output signal S3 to blue pixel 1 and select the output signal S6 to blue pixel 2, so that the positive polarity voltage V+ is transmitted to blue pixel 1 to drive blue pixel 1 to emit light, and the negative polarity voltage V- is transmitted to blue pixel 2 to drive blue pixel 2 to emit light. When the potential of the polarity control signal POL is low, that is, POL=L, combined with Figure 9 It can be seen that OMUX3 can select the output signal S6 to the blue pixel 1 and select the output signal S3 to the blue pixel 2, so that the positive polarity voltage V+ is transmitted to the blue pixel 2 to drive the blue pixel 2 to emit light, and the negative polarity voltage V- is transmitted to the blue pixel 1 to drive the blue pixel 1 to emit light.

[0094] Based on the above drive, combined with Figure 3 That is, it can be seen that the display driving circuit provided in the embodiment of the present application can also make the polarities of adjacent pixels of different colors exactly opposite, thereby achieving polarity reversal.

[0095] Alternatively, still based on the display panel including a plurality of pixels of three colors, namely, red pixels R, green pixels G and blue pixels B, and taking one signal selection unit 02 connected to pixels of different colors in adjacent columns as an example, Figure 10 and Figure 11 The driving principle under this connection mode is also schematically shown: Figure 10 It can be seen that VH Amp1 and VL Amp1 can belong to a group of signal providing units 01, connected to OMUX1, that is, controlled by OMUX1, and jointly drive the adjacent red pixel 1 and green pixel 2. VH Amp2 and VL Amp2 can belong to a group of signal providing units 01, connected to OMUX2, controlled by OMUX2, and jointly drive the adjacent blue pixel 1 and red pixel 2. VH Amp3 and VL Amp3 can belong to a group of signal providing units 01, connected to OMUX3, controlled by OMUX3, and jointly drive the adjacent green pixel 2 and blue pixel 2.

[0096] For adjacent red pixel 1 and green pixel 2, the signal S1 output by VH Amp1 and the signal S2 output by VL Amp1 can be used as the input of OMUX1 and transmitted to OMUX1. Among them, the signal S1 can be a positive polarity voltage V+, and the signal S2 can be a negative polarity voltage V-. When the potential of the polarity control signal POL is high, that is, POL=H, combined with Figure 10 It can be seen that OMUX1 can select the output signal S1 to the red pixel 1 and select the output signal S2 to the green pixel 1, so that the positive polarity voltage V+ is transmitted to the red pixel 1 to drive the red pixel 1 to emit light, and the negative polarity voltage V- is transmitted to the green pixel 1 to drive the green pixel 1 to emit light. When the potential of the polarity control signal POL is low, that is, POL=L, combined with Figure 11 It can be seen that OMUX1 can select output signal S2 to red pixel 1 and select output signal S1 to green pixel 1, so that the positive polarity voltage V+ is transmitted to green pixel 1 to drive green pixel 1 to emit light, and the negative polarity voltage V- is transmitted to red pixel 1 to drive red pixel 1 to emit light. The driving methods of other color pixels are similar and will not be repeated here.

[0097] Although Figure 10 and Figure 11 The structure shown can also achieve polarity reversal, but compared Figure 8 and Figure 10 , Figure 9 and Figure 11 It can be seen that, taking OMUX1 as an example, in the display driving circuit provided by the embodiment of the present application, since OMUX1 is connected to adjacent pixels of the same color, when POL=H, VH Amp1 can cooperate with OMUX1 to output the positive polarity voltage V+ required for red pixel 1, and when POL=L, VH Amp1 can cooperate with OMUX1 to output the positive polarity voltage V+ required for red pixel 2. The same applies to other OMUXs and will not be repeated here. Figure 10 and Figure 11 In the structure shown, since OMUX1 is connected to adjacent pixels of different colors, when POL=H, VH Amp1 cooperates with OMUX1 to output the positive polarity voltage V+ required for red pixel 1. When POL=L, VH Amp1 cooperates with OMUX1 to output the positive polarity voltage V+ required for green pixel 1. The same applies to other OMUXs and will not be described in detail. Taking dot inversion as an example, since the potential of the polarity control signal POL jumps every row, in the embodiment of the present application, for example, VH Amp1 will alternately output the positive polarity voltage V+ required for red pixel 1 and the positive polarity voltage V+ required for red pixel 2, and Figure 10 and Figure 11In the embodiment shown, for example, VH Amp1 alternately outputs the positive polarity voltage V+ required by red pixel 1 and the positive polarity voltage V+ required by green pixel 2. The same applies to column inversion, which will not be described in detail.

[0098] As previously mentioned, the voltage difference required between different pixels of the same color is small or even the same, while the voltage difference required between different pixels of different colors is large. In addition, during the operation of the display panel, most adjacent pixels of the displayed image are connected, appearing to be the same or similar colors. Therefore, the voltages between many adjacent pixels of the same color are also similar. It can be seen that the embodiment of the present application drives adjacent pixels of the same color to emit light by setting a display driving circuit, which not only does not affect the display effect, but also because the voltage change size and change frequency required when the potential of the polarity control signal POL jump are relatively small, so the power generated is also relatively small.

[0099] For example, combined with Figures 8 to 11 , taking VH Amp1 as an example, Figure 12 Schematic diagram showing the common power consumption test image, VH Amp1 in the traditional display drive circuit (corresponding to Figure 10 and Figure 11 ) and the display driving circuit provided in the embodiment of the present application (corresponding to Figure 8 and Figure 9 ) in the voltage output. The horizontal axis refers to the lane number, which is used to identify the channel position, such as 500 for the 500th channel and 1000 for the 1000th channel; the vertical axis refers to the voltage, in volts (V). Optionally, combined with Figure 3 In the embodiment of the present application, one channel may correspond to a column of pixels connected to the display driving circuit 00 via one data line Data.

[0100] refer to Figure 12 It can be further seen that, in the display driver circuit provided in the embodiment of the present application, VH Amp1 alternately outputs the positive polarity voltage V+ required by red pixel 1 and the positive polarity voltage V+ required by red pixel 2, while in the conventional display driver circuit, VH Amp1 alternately outputs the positive polarity voltage V+ required by red pixel 1 and the positive polarity voltage V+ required by green pixel 2. Therefore, compared with the conventional circuit, the voltage amplitude and frequency variation of the output of VH Amp1 in the embodiment of the present application are significantly reduced, and accordingly, the dynamic power consumption of the circuit can be significantly reduced.

[0101] Optionally, the display driving circuit described in the embodiment of the present application may further include: a driving unit (not shown in the drawings).

[0102] The driving section may be connected to a digital-to-analog converter (ie, VH-DAC) in the positive polarity voltage supply section 011 and a digital-to-analog converter (ie, VL-DAC) in the negative polarity voltage supply section 012 .

[0103] The driving unit can be configured to provide a positive grayscale voltage to the digital-to-analog converter VH-DAC in the positive voltage supply unit 011 and a negative grayscale voltage to the digital-to-analog converter VH-DAC in the negative voltage supply unit 012 .

[0104] Optionally, the driving unit may generate a grayscale voltage according to the image to be displayed, and provide the grayscale voltage to the signal providing unit 01 .

[0105] Optionally, the display driving circuit described in the embodiment of the present application may further include: a control unit (not shown in the drawings).

[0106] The control unit may be connected to the signal selection unit 02 .

[0107] The control unit may be configured to provide a polarity control signal POL to the signal selection unit 02 .

[0108] Optionally, in some embodiments, the driver unit may be, for example, a source controller. The control unit may be integrated with the driver unit. This simplifies the layout and reduces costs. Of course, the two units may also be independently configured.

[0109] Based on the foregoing description, the embodiment of the present application provides a new display driving circuit structure, which changes the connection relationship between the display driving circuit and the pixels so that each operational amplifier Amp can always provide the required voltage to multiple pixels of the same color, thereby solving the problem of large voltage variation caused by the need for each Amp to provide the required voltage to multiple pixels of different colors in traditional polarity inversion driving. Accordingly, dynamic power consumption can be reduced.

[0110] In summary, an embodiment of the present application provides a display driver circuit. In particular, a signal selection unit, under the control of a received polarity control signal, can alternately select the positive polarity voltage provided by the positive polarity voltage supply unit and the negative polarity voltage provided by the negative polarity voltage supply unit in time periods, and transmit the same polarity voltage selected in the same time period to two pixels of the same color, respectively, so that the two pixels of the same color can alternately receive positive and negative polarity voltages in different time periods, and at any moment, any pixel only receives a positive polarity voltage or a negative polarity voltage. That is, the display driver circuit can not only achieve polarity reversal drive, avoid polarization of liquid crystal molecules, and ensure a better display effect, but also can always provide the required positive polarity voltage or negative polarity voltage to different pixels of the same color, so that when polarity reversal is achieved, the voltage variation amplitude and frequency provided by each voltage supply unit are small, and thus the power consumption generated by the display driver circuit is also correspondingly small.

[0111] The embodiment of the present application also provides a driving method of a display driving circuit, which can be applied to a signal selection unit included in the display driving circuit. Figure 13 As shown, the method includes:

[0112] Step 1301: In a first time period, a polarity control signal of a first potential is received, and in response to the polarity control signal of the first potential, a positive polarity voltage provided by a positive polarity voltage providing unit is selected to be transmitted to one of two pixels of the same color, and a negative polarity voltage provided by a negative polarity voltage providing unit is selected to be transmitted to the other of the two pixels of the same color.

[0113] Step 1302: In the second time period, a polarity control signal of a second potential is received, and in response to the polarity control signal of the second potential, a negative polarity voltage provided by a negative polarity voltage providing unit is selected to be transmitted to one pixel, and a positive polarity voltage provided by a positive polarity voltage providing unit is selected to be transmitted to another pixel.

[0114] The first time period and the second time period are different time periods, and the first potential is greater than the second potential. It should be noted that there is no limitation on the order of the first time period and the second time period.

[0115] It is understandable that since the driving method has substantially the same technical effects as the aforementioned display driving circuit, the technical effects of the driving method will not be described again here for the sake of brevity.

[0116] The embodiment of the present application also provides a display driver chip. Figure 14 As shown, the display driver chip includes: Figures 4 to 9 Any of the display driving circuits 00 shown.

[0117] It is understandable that since the display driver chip has substantially the same technical effects as the aforementioned display driver circuit, the technical effects of the display driver chip will not be described again here for the sake of brevity.

[0118] The present application also provides a display device. Figure 15 As shown, the display device includes: a display panel 10, and Figure 14 The display driver chip 100 is shown.

[0119] exist Figure 15 Based on, combined Figure 3 and Figure 14 It can be seen that the display panel 10 includes a plurality of pixels of multiple colors, and the display driving circuit 00 included in the display driving chip 100 is connected to the plurality of pixels and is used to drive the plurality of pixels to emit light.

[0120] Optionally, the display device described in the embodiments of the present application may be an LCD. Furthermore, the display device may be any suitable display device, including but not limited to mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, navigation systems, and e-books, and any other product or component with a display function.

[0121] It is understandable that since the display device and the display driving circuit described above have substantially the same technical effects, for the purpose of brevity, the technical effects of the display device will not be repeatedly described here.

[0122] It is understood that the terms used in the embodiments of this application are only used to explain the embodiments of this application and are not intended to limit this application. Unless otherwise defined, technical terms or scientific terms used in the embodiments of this application should have the common meaning understood by people with ordinary skills in the field to which this application belongs.

[0123] For example, the terms "first," "second," or "third," and similar terms used in the patent specification and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Terms such as "include" or "comprises" mean that the elements or objects preceding "include" or "comprises" include the elements or objects listed after "include" or "comprises," and their equivalents, and do not exclude other elements or objects. Terms such as "upper," "lower," "left," or "right" are used only to indicate relative positional relationships. When the absolute position of the described objects changes, the relative positional relationship may also change accordingly. "Connected" or "coupled" refers to an electrical connection. "And / or" indicates that three possible relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exists simultaneously, or B exists alone. The character " / " generally indicates that the objects in the preceding and following relationship are in an "or" relationship.

[0124] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display driving circuit, characterized in that: Used to drive a plurality of pixels including a plurality of colors in a display panel to emit light, the display driving circuit comprising: a plurality of groups of signal supply units and a plurality of groups of signal selection units corresponding to each other, each group of the signal supply units being connected to a corresponding signal selection unit, each group of the signal selection units being further connected to at least one group of pixels, each group of pixels including two pixels of the same color, each group of the signal supply units comprising: a positive polarity voltage supply unit and a negative polarity voltage supply unit corresponding to each group of pixels; The positive polarity voltage providing unit is used to: provide a positive polarity voltage; The negative polarity voltage providing unit is used to: provide a negative polarity voltage; The signal selection unit is used to: receive a polarity control signal, and in response to the polarity control signal, select the positive polarity voltage to be transmitted to the two pixels of the same color at different time periods, and select the negative polarity voltage to be transmitted to the two pixels of the same color at different time periods, and in the same time period, the voltage transmitted to the same pixel is the positive polarity voltage or the negative polarity voltage.

2. The display driving circuit according to claim 1, wherein: Each group of the signal selection parts is connected to a group of pixels. Each group of pixels includes two adjacent pixels of the same color, and the pixels connected to the adjacent signal selection parts have different colors.

3. The display driving circuit according to claim 1, wherein: The plurality of pixels are arranged in an array; The potential of the polarity control signal changes once per row or once per frame; wherein the change refers to a change from a first potential to a second potential, and the first potential is greater than the second potential.

4. The display driving circuit according to any one of claims 1 to 3, wherein: The signal selection unit includes: an output multiplexer; The input port of the output multiplexer is connected to the signal providing unit, the output port of the output multiplexer is connected to the pixel, and the control port of the output multiplexer is used to receive the polarity control signal; The output multiplexer is used to: in response to the polarity control signal, control the positive polarity voltage supply unit to be respectively turned on with the two pixels of the same color at different time periods, so as to select the positive polarity voltage to be transmitted to the two pixels of the same color at different time periods, and control the negative polarity voltage supply unit to be respectively turned on with the two pixels of the same color at different time periods, so as to select the negative polarity voltage to be transmitted to the two pixels of the same color at different time periods, and in the same time period, control the positive polarity voltage supply unit or the negative polarity voltage supply unit to be turned on with the same pixel, so that the voltage transmitted to the same pixel is the positive polarity voltage or the negative polarity voltage.

5. The display driving circuit according to any one of claims 1 to 3, characterized in that: The positive polarity voltage providing unit includes: a digital-to-analog converter and an operational amplifier; The digital-to-analog converter is used to: receive a positive polarity grayscale voltage, convert the positive polarity grayscale voltage from a digital signal to an analog signal, and then transmit the analog signal to the operational amplifier; The operational amplifier is used to amplify the received positive polarity grayscale voltage into the positive polarity voltage and then transmit the amplified voltage to the signal selection unit.

6. The display driving circuit according to any one of claims 1 to 3, characterized in that: The negative polarity voltage providing unit includes: a digital-to-analog converter and an operational amplifier; The digital-to-analog converter is used to: receive a negative polarity grayscale voltage, convert the negative polarity grayscale voltage from a digital signal to an analog signal, and then transmit the analog signal to the operational amplifier; The operational amplifier is used to amplify the received negative polarity grayscale voltage into the negative polarity voltage and then transmit the amplified voltage to the signal selection unit.

7. The display driving circuit according to claim 5 or 6, characterized in that: The display driving circuit further includes: a driving unit; The driving unit is connected to the digital-to-analog converter in the positive polarity voltage providing unit and the digital-to-analog converter in the negative polarity voltage providing unit; The driving section is configured to provide a positive polarity grayscale voltage to the digital-to-analog converter in the positive polarity voltage providing section, and to provide a negative polarity grayscale voltage to the digital-to-analog converter in the negative polarity voltage providing section.

8. The display driving circuit according to any one of claims 1 to 3, characterized in that: The display driving circuit further includes: a control unit; The control unit is connected to the signal selection unit; The control unit is configured to provide the polarity control signal to the signal selection unit.

9. A driving method for a display driving circuit, characterized in that: Applicable to a signal selection unit included in a display driving circuit according to any one of claims 1 to 8; the method comprises: In a first time period, a polarity control signal of a first potential is received, and in response to the polarity control signal of the first potential, a positive polarity voltage provided by a positive polarity voltage supply unit is selected to be transmitted to one of two pixels of the same color, and a negative polarity voltage provided by a negative polarity voltage supply unit is selected to be transmitted to the other of the two pixels of the same color; In a second period, receiving a polarity control signal of a second potential, and in response to the polarity control signal of the second potential, selecting the negative polarity voltage provided by the negative polarity voltage providing unit to be transmitted to the one pixel, and selecting the positive polarity voltage provided by the positive polarity voltage providing unit to be transmitted to the other pixel; The first time period and the second time period are different time periods, and the first potential is greater than the second potential.

10. A display driver chip, characterized in that: The display driver chip comprises: the display driver circuit according to any one of claims 1 to 8.

11. A display device, characterized in that: The display device comprises: a display panel, and the display driver chip according to claim 10; The display panel includes a plurality of pixels of multiple colors, and the display driving chip includes a display driving circuit connected to the plurality of pixels and configured to drive the plurality of pixels to emit light.

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