CN109903716B - Pixel unit charging method and device, display device - Google Patents

Abstract

The invention discloses a charging method and device for a pixel unit, and a display device, belonging to the field of display technology. The method includes: obtaining a data signal to be charged for charging a pixel unit to be charged, and a charged data signal for charging a pixel unit that has been charged, and the pixel unit that has been charged and the pixel unit to be charged are provided by the same The root data line provides a data signal, and the pixel unit to be charged is any one of a plurality of pixel units in the display panel; based on the charged data signal and the data signal to be charged, it is determined to charge the pixel unit to be charged a compensation signal; using the compensation signal to charge the pixel unit to be charged during a compensation charging period, and the compensation charging period is within the charging period of the pixel unit. The invention can reduce the influence of insufficient charging on the display effect of the display panel.

Description

Pixel unit charging method and device, display device

technical field

The present invention relates to the field of display field, in particular to a charging method and device for a pixel unit, and a display device.

Background technique

The display device includes: a display panel and a driving circuit for driving the display panel to display. The display panel includes a plurality of pixel units crossed by a plurality of data lines and a plurality of gate lines. And each pixel unit is connected with the gate line and the data line. The driving circuit may include a gate driving circuit and a source driving circuit. The source driving circuit provides data signals to the pixel units through the data lines to charge each pixel unit, so as to control the display panel to display images.

In the related art, generally, a plurality of pixel units are charged sequentially in a row-by-row and column-by-column manner, and the charging time of each pixel unit is the same. During the charging process, whether to charge the pixel unit connected to the gate line can be controlled through the gate line, and a data signal for charging the pixel unit can be provided through the data line.

However, since the time for charging each pixel unit is limited and the charging time for each pixel unit is the same, at least some of the pixel units are undercharged, which affects the display effect of the display panel.

Contents of the invention

Embodiments of the present invention provide a pixel unit charging method and device, and a display device, which can solve the problem of insufficient charging of the pixel unit in the related art and affect the display efficiency of the display panel. Described technical scheme is as follows:

In one aspect, a method for charging a pixel unit is provided, the method comprising:

Acquiring a data signal to be charged for charging the pixel unit to be charged, and a charged data signal for charging the pixel unit to be charged, the charged pixel unit and the pixel unit to be charged are provided with data by the same data line signal, the pixel unit to be charged is any one of a plurality of pixel units in the display panel;

determining a compensation signal for charging the pixel unit to be charged based on the charged data signal and the to-be-charged data signal;

Using the compensation signal to charge the to-be-charged pixel unit during a compensation charging period, the compensation charging period being within a charging period of the pixel unit.

Optionally, the determining a compensation signal for charging the pixel unit to be charged based on the charged data signal and the to-be-charged data signal includes:

determining a compensation difference signal based on the charged data signal and the to-be-charged data signal;

A superposition signal of the compensation difference signal and the data signal to be charged is determined as the compensation signal.

Optionally, the determining the compensation difference signal based on the charged data signal and the to-be-charged data signal includes:

Based on the charged data signal, acquiring a first display gray scale displayed by the charged pixel unit driven by the charged data signal;

Based on the to-be-charged data signal, acquire a second display grayscale displayed by the to-be-charged pixel unit driven by the charged data signal;

The compensation difference signal is determined based on a gray scale difference between the first displayed gray scale and the second displayed gray scale.

Optionally, the determining the compensation difference signal based on the gray scale difference between the first display gray scale and the second display gray scale includes:

If the gray-scale difference is within the range of the reference gray-scale difference, and when the gray-scale difference is within [8×(p-1)+1, 8×p], determine the superimposed signals of the P compensation unit signals is the compensation difference signal, and the P is a positive integer.

Optionally, the display panel includes a plurality of pixel units arranged in an array, the data lines are used to provide data signals to the pixel units located in the same scanning column, and the charged pixel unit is where the pixel unit to be charged is located. The pixel unit in the previous scan line of the scan line.

Optionally, before using the compensation signal to charge the pixel unit to be charged within the compensation charging period, the method further includes:

Determine the target display partition where the pixel unit to be charged is located, and the display panel includes: N display partitions arranged from near to far according to the data signal terminal, the data signal terminal is used to provide the plurality of pixel units A data signal, the N is a positive integer greater than 1;

determining the sequence of the target display partitions among the N display partitions arranged in sequence;

Based on the order and the duration of the charging period, the duration of the compensation charging period is determined, and the starting point of the charging period is determined as the starting point of the compensation charging period.

Optionally, the charging period of the pixel unit further includes: other charging periods, after charging the pixel unit to be charged by using the compensation signal within the compensation charging period, the method further includes:

Using the data signal to be charged to charge the pixel unit to be charged in the other charging period.

In another aspect, a charging device for a pixel unit is provided, the device comprising:

An acquisition module, configured to acquire a data signal to be charged for charging the pixel unit to be charged, and a charged data signal for charging the pixel unit to be charged, the charged pixel unit and the pixel unit to be charged are provided by the same The root data line provides a data signal, and the pixel unit to be charged is any one of a plurality of pixel units in the display panel;

A determining module, configured to determine a compensation signal for charging the pixel unit to be charged based on the charged data signal and the to-be-charged data signal;

A control module, configured to control the charging of the pixel unit to be charged by using the compensation signal in a compensation charging period, and the compensation charging period is within the charging period of the pixel unit.

Optionally, the charging period of the pixel unit further includes: other charging periods, and the control module is further configured to control the charging of the pixel unit to be charged by using the compensation signal in the compensation charging period. The to-be-charged data signal charges the to-be-charged pixel unit in the other charging period.

In yet another aspect, a display device is provided, the display device comprising: the charging device for a pixel unit according to any one of the second aspect.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

The charging method and device for the pixel unit and the display device provided by the embodiments of the present invention determine the compensation signal for charging the pixel unit to be charged, and use the compensation signal to charge the pixel unit to be charged within the compensation charging period, and the compensation charging period is located in the pixel unit. During the charging period, compared with the related technology, the pixel unit can be compensated and charged, so that the pixel unit can be charged to the desired target voltage as much as possible during the charging period of the pixel unit, which can meet the charging requirements of the pixel unit and reduce the damage caused by insufficient charging. Influence on the display effect of the display panel.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of simultaneous operation of display drive and touch drive in a conventional touch display device provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of time-sharing operation of display driving and touch driving in a display device with a display refresh rate of 60 Hz provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of time-sharing operation of display drive and touch drive in a display device with a display refresh rate of 120 Hz provided by an embodiment of the present invention;

4 is a schematic diagram of a voltage waveform of a pixel electrode in a pixel unit during a process of charging a pixel unit using a related technology provided by an embodiment of the present invention;

FIG. 5 is a flowchart of a charging method for a pixel unit provided by an embodiment of the present invention;

FIG. 6 is a flow chart of another charging method for a pixel unit provided by an embodiment of the present invention;

FIG. 7 is a structural block diagram of a source driving circuit provided by an embodiment of the present invention;

Fig. 8 is a connection structure diagram between the latch module and the output buffer amplifier in Fig. 7;

FIG. 9 is a flowchart of a method for determining a compensation difference signal provided by an embodiment of the present invention;

Fig. 10 is a flow chart of a method for determining a compensation charging period provided by an embodiment of the present invention;

FIG. 11 is a schematic partition diagram of a display panel provided by an embodiment of the present invention;

Fig. 12 is a flow chart of another method for determining a compensation charging period provided by an embodiment of the present invention;

FIG. 13 is a timing diagram of charging pixel units in two adjacent scan lines by using the charging method provided by the embodiment of the present invention;

Fig. 14 is a schematic diagram of the voltage waveform of the pixel electrode in the pixel unit in the process of charging the pixel unit by using the charging method provided by the embodiment of the present invention according to the embodiment of the present invention;

Fig. 15 is a schematic structural diagram of a charging device for a pixel unit provided by an embodiment of the present invention;

Fig. 16 is a schematic structural diagram of a determination module provided by an embodiment of the present invention.

Detailed ways

In order to make the principles and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

With the development of display technology, the functions of the display device are more and more diversified, and accordingly, higher requirements are put forward for the charging effect of the pixel units in the display device.

For example, in a conventional touch display device, as shown in FIG. 1 , display driving and touch driving work simultaneously. In a touch display driver integrate (TDDI) display device, please refer to FIG. 2 and FIG. 3 , the display driver and the touch driver work in a time-sharing manner. The interference between the control signals improves both the display performance and the touch performance. However, compared with the conventional touch display device, the touch drive in the TDDI display device will take up a part of the display time, resulting in a shorter charging time for the pixel unit. , which in turn leads to the problem of insufficient charging of the pixel unit, which affects the display effect of the display device. Especially in a heavy-duty picture (a picture with a large brightness contrast in adjacent display areas), insufficient charging will cause a large difference in the brightness of the pixel units with different distances from the drive signal terminal, resulting in a more obvious display screen of the display device. uneven brightness. Moreover, the effect is more obvious after adding reporting rate technology and active pen technology.

Among them, FIG. 2 is a schematic diagram of the time-sharing operation of display driving and touch driving in a display device with a display refresh rate of 60 Hz, and FIG. 3 is a time-sharing diagram of display drive and touch drive in a display device with a display refresh frequency of 120 Hz. Schematic diagram of the work. In FIGS. 1 to 3 , D represents the working period of display driving, T represents the working period of touch driving, and B represents the blanking period during the display process.

As an example, FIG. 4 is a schematic diagram of a voltage waveform of a pixel electrode in a pixel unit during the process of charging the pixel unit in the related art. As shown in FIG. 4 , t1 is the total time for charging the pixel unit. t2 is the duration of charge retention by the pixel electrode in the pixel unit under the action of charge retention and the like after the data signal at the effective potential is stopped being provided to the pixel unit. t3=t1-t2, t4 is the duration of charging the pixel unit next to the pixel unit, that is, the period corresponding to t4 can be regarded as the period t3 of the next pixel unit. It can be seen from Figure 4 that during the period t3, the voltage of the pixel electrode increases gradually, but due to the long delay time in the charging process, when the data signal at an effective potential is stopped to the pixel unit, the pixel has not yet been charged. The electrode is charged to the target voltage, that is, the charging voltage of the pixel electrode usually cannot reach the desired target voltage within a limited charging time, resulting in insufficient charging of the pixel unit. Wherein, the length of the delay time in the charging process can be seen from the slope of the waveform in the period t3, since the slopes of the waveforms in the period t3 are all small, it can be seen that the delay time in the charging process is relatively long.

For another example, due to the high cost of the TDDI display device, in order to reduce the cost, the TDDI display device commonly used in the related art has a double-gate structure to reduce the number of integrated circuits (IC) in the display device. However, this will result in the multiplication of the number of gate lines in the display device, which in turn will lead to halving the charging time, and will also lead to insufficient charging of the pixel units, which will affect the display effect of the display device.

For this reason, in the related art, there is a method of reducing the load of the display panel in the display device to increase the charging time, but due to the limitation of process conditions and product yield, the load of the display panel cannot be reduced too much, resulting in insufficient charging of the pixel unit risks of. Alternatively, in the related art, there is also a scheme of increasing the driving capability of the source driving circuit, such as a scheme of increasing the driving current of the source driving circuit, which can improve the charging effect of the pixel unit that is closer to the driving signal terminal, but In the case of a large load on the display panel, it is still unable to improve the charging effect of the pixel units that are far away from the driving signal terminal.

An embodiment of the present invention provides a charging method for a pixel unit. By performing compensation charging on the pixel unit, the pixel unit can be charged to a target voltage within a charging period of the pixel unit, thereby meeting the charging requirements of the pixel unit. As shown in Figure 5, the method may include:

Step 501. Obtain a data signal to be charged for charging the pixel unit to be charged, and a charged data signal for charging the pixel unit to be charged.

Wherein, the charged pixel unit and the pixel unit to be charged are provided with data signals by the same data line, and the pixel unit to be charged is any one of multiple pixel units in the display panel.

Step 502 , based on the charged data signal and the to-be-charged data signal, determine a compensation signal for charging the pixel unit to be charged.

The compensation signal is a data signal after adjusting the data signal to be charged according to the data signal to be charged and the data signal to be charged, and the data signal to be charged and the data signal to be charged can reflect the charging condition of the pixel unit to be charged , by using the compensation signal to perform compensation charging on the pixel unit to be charged, the pixel electrode can be charged to a desired target voltage as much as possible within the charging period of the pixel unit.

Step 503 , using the compensation signal to charge the pixel unit to be charged within the compensation charging period, the compensation charging period being within the charging period of the pixel unit.

To sum up, the charging method of the pixel unit provided by the embodiment of the present invention determines the compensation signal for charging the pixel unit to be charged, and uses the compensation signal to charge the pixel unit to be charged within the compensation charging period, and the compensation charging period is located in the pixel unit. During the charging period, compared with the related technology, the pixel unit can be compensated and charged, so that the pixel unit can be charged to the desired target voltage as much as possible during the charging period of the pixel unit, which can meet the charging requirements of the pixel unit and reduce the damage caused by insufficient charging. Influence on the display effect of the display panel.

FIG. 6 is a flow chart of another charging method for a pixel unit provided by an embodiment of the present invention. And the method can be realized by each module in the source driving circuit. FIG. 7 is a structural block diagram of a source driving circuit provided by an embodiment of the present invention. For ease of understanding, the working principle of the source drive circuit is explained below:

As shown in FIG. 7 , the source driving circuit may include: a bidirectional shift register, a data register, a latch module, a level conversion module, a digital-to-analog conversion (D/A) module and an output buffer amplifier. The bidirectional shift register can store the received data signal into the data register according to the start signal SP1, SP2 and the clock signal CLK, and then latch the data signal for a certain period of time (such as the scanning period of one horizontal line) through the latch module After that, it is transmitted to the level conversion module, which is used to perform level conversion on the received data signal. The converted signal can be called a gray-scale signal (for example, converted into a gray-scale voltage), and the converted The grayscale signal is transmitted to the D/A module to convert the discrete digital signal into a continuous analog signal, and convert the polarity of the converted data signal, and then connect to the data line through the output buffer amplifier and the data line The pixel unit is charged.

Wherein, the arrows in FIG. 7 are used to indicate the signal flow direction. Moreover, the signals shown in FIG. 7 are only schematic representations of signals transmitted in the source driving circuit, and are not used to limit the signals transmitted in the source driving circuit. For example, gamma voltage G, signal Q for controlling the polarity of data signals, latch control signal L for controlling latching, switching control signal S for controlling level switching, and video data can also be transmitted in the source driving circuit. Signals Vr, Vg, Vb, etc., the video data signal is sent to the data register through the data receiver.

FIG. 8 is a structural diagram of the connection between the latch module and the output buffer amplifier in FIG. 7 . As shown in 8, the latch module includes: a first latch submodule and a second latch submodule. And the source drive circuit may further include: an amplifier, an acquisition module, a determination module, a control module, a first switch module S1, a second switch module S2, a third switch module S3, a fourth switch module S4, a fifth switch module S5, The sixth switch module S6, the seventh switch module S7 and other switch modules SQ. Wherein, there are two connection paths between the first latch sub-module and the second latch sub-module. In one connection path, the first latch submodule can be connected to the second latch submodule through the fifth switch submodule. In another connection path, the first latch submodule can be connected to the second latch submodule through the first switch module, the acquisition module, the determination module, and the second switch module in sequence. The determination module is also connected to the control module, and each switch submodule is also connected to the control module, and the control module is used to provide a control signal to the corresponding switch submodule to control the corresponding switch submodule to turn on or off . Wherein, the amplifier is powered by the power supply terminals AVDD and GNDA, and the source driving circuit is powered by the high voltage power signal terminal VDD and the low voltage power signal terminal VSS. Since the charging method of the pixel unit provided by the embodiment of the present invention is mainly realized by the acquisition module, the determination module and the control module, the working principles of the acquisition module, the determination module and the control module will be introduced in conjunction with the steps below, therefore, other How the module works.

As shown in FIG. 8 , within the same scan time period, the first latch sub-module and the second latch sub-module are respectively used to latch data signals of two adjacent scan lines. For example, during the period of scanning the pixel units in the Nth row, the first latch submodule is used to latch the data signal of the N+1th row of pixel units, and the second latch submodule is used to latch the data signal of the Nth row Data signal of N rows of pixel units.

When the fifth switch submodule is in the on state, the first latch submodule can provide a data signal to the second latch submodule, and the data signal is sequentially transmitted to the level conversion module and D through the second latch submodule. After the /A module, the grayscale signal converted by the D/A module can be transmitted to other switch sub-modules. The other sub-modules can select odd and even columns according to driving requirements, so that the grayscale signal can be transmitted to the selected odd column OOP or even column EOP. Then, the gray-scale signal can be sequentially transmitted through the amplifier and the second latch sub-module to the data line for providing the data signal to the corresponding odd column or even column, and through the data line to the corresponding pixel unit Charge. Wherein, the pixel unit includes a pixel electrode, and the process of charging the pixel unit is mainly a process of providing a data signal to the pixel electrode and storing electric energy in the pixel electrode.

It should be noted that, for ease of viewing, FIG. 8 shows a schematic diagram of connections between the latch module that provides data signals to the pixel units in odd columns to the output buffer amplifier, and the acquisition module, the determination module and the control module. Connections between the modules from the latch module that provides data signals to the pixel units in even columns to the output buffer amplifier, and the acquisition module, determination module and control module are not shown.

As shown in Figures 6 to 8, the method may include:

Step 601. Obtain the data signal to be charged for charging the pixel unit to be charged, and the charged data signal for charging the pixel unit that has been charged. The charged pixel unit and the pixel unit to be charged are provided with data by the same data line Signal.

The display panel can include a plurality of pixel units arranged in an array, and the data lines can be used to provide data signals to the pixel units in the same scanning column. At this time, the charged pixel unit is the previous scanning line of the scanning line where the pixel unit to be charged is located. Pixel units in . Alternatively, the data line can also be used to provide data signals to the pixel units located in the same scanning row. At this time, the charged pixel unit is the pixel unit in the previous scanning column of the scanning column where the pixel unit to be charged is located.

Optionally, step 601 may be implemented by the acquiring module in FIG. 8 . Since the acquisition module is connected to the first latch submodule through the first switch submodule, after the first latch submodule receives the data signal, it can send the data signal to the acquisition module, and the acquisition module can transfer the received The data signal is stored, so the acquisition module can acquire the data signal to be charged and the charged data signal.

Step 602: Determine a compensation difference signal based on the charged data signal and the to-be-charged data signal.

As shown in FIG. 9, the implementation of step 602 may include:

Step 6021, based on the charged data signal, obtain the first display gray scale displayed by the charged pixel unit under the driving of the charged data signal, and based on the to-be-charged data signal, obtain the to-be-charged pixel unit driven by the charged data signal The second display gray scale shown below.

There is usually a corresponding relationship between the data signal and the gray scale. For example, when the gray scale to be displayed by the pixel unit to be charged is 100, the pixel unit to be charged can be charged by using a 2.6 volt data signal, so that the charged pixel unit Capable of displaying gray scale 100.

In one practicable manner, after the acquisition module acquires the data signal, it can convert the data signal into a gray scale value according to the corresponding relationship between the data signal and the gray scale, and map the data signal to the data signal The grayscale value of is sent to the determination module. Therefore, the determination module can acquire the first display grayscale corresponding to the charged pixel unit and the second display grayscale corresponding to the pixel unit to be charged.

In another practicable manner, the acquiring module can send the data signal to the determining module, and after receiving the data signal, the determining module can convert the data signal into a corresponding grayscale value. Therefore, after the determination module acquires the charged data signal and the to-be-charged data signal, it can acquire the first display grayscale corresponding to the charged pixel unit and the second display grayscale corresponding to the to-be-charged pixel unit.

Step 6022: Determine a compensation difference signal based on the gray scale difference between the first displayed gray scale and the second displayed gray scale.

This step 6022 can be implemented by a determination module. The compensation difference signal is determined according to the charged data signal and the to-be-charged data signal, and is a signal that requires additional charging of the pixel unit to be charged. By using the compensation difference signal to perform compensation charging on the pixel unit to be charged, the pixel electrode can be charged to a desired target voltage as much as possible within the charging period of the pixel unit.

In a practicable manner, the display device may store a corresponding relationship between gray levels and difference signals. After the determining module acquires the gray-scale difference between the first display gray-scale and the second display gray-scale, it may first determine whether the gray-scale difference is within the reference gray-scale difference range, and if the gray-scale difference is within the reference gray-scale difference range, The corresponding relationship can be queried according to the gray scale difference, and the difference signal corresponding to the gray scale difference is determined as the compensation difference signal. Wherein, the corresponding relationship may be stored in the determining module, or may be stored in other locations of the display device, which is not specifically limited in the embodiment of the present invention.

Optionally, the corresponding relationship can be expressed as: if the grayscale difference is within the reference grayscale difference range, and when the grayscale difference is within [8×(p-1)+1, 8×p], the grayscale The compensation difference signal corresponding to the difference is a superposition signal of P compensation unit signals, where P is a positive integer. The size of the compensation unit signal can be determined according to actual needs. For example, the compensation unit signal may have a voltage of 0.1 volts, and the superposition signal of five compensation unit signals may have a voltage of 0.5 volts.

The value range of the reference gray scale difference range may be determined according to actual needs. For example, gray scale differences smaller than the lower limit of the reference gray scale difference range may be negative numbers, and the maximum value of the reference gray scale difference range may be 255.

For example, it is assumed that the compensation unit signal may be at a voltage of 0.1 volts. The corresponding relationship between the gray scale and the difference signal can be shown in Table 1, that is, when the gray scale is in the range of [1,8], the corresponding difference signal is a compensation unit signal, and the gray scale is in [9,16] Within the range, the corresponding difference signal is 2 compensation unit signals, ..., when the gray scale is in the range of [217,224], the corresponding difference signal is 28 compensation unit signals, therefore, in When it is determined that the gray scale difference is 10, the compensation difference signal corresponding to the data signal to be charged may be a superposition signal of two compensation unit signals, that is, the compensation difference signal is a voltage of 0.2 volts. Alternatively, when the gray scale difference is determined to be -10, the compensated difference signal corresponding to the data signal to be charged may be a superposition signal of -2 compensation unit signals, that is, the compensated difference signal is a voltage of -0.2 volts.

Table 1

Gray range Signal [1,8] 1 compensation unit signal [9,16] 2 compensation unit signals  …  … [217, 224] 28 compensation unit signals [-224, -217] -28 compensation unit signals  …  … [-16, -9] - 2 compensation unit signals [-8,-1] -1 compensation unit signal

Step 603. Determine the superposition signal of the compensation difference signal and the data signal to be charged as the compensation signal.

Optionally, step 603 may be implemented by a determining module. The compensated difference signal is a signal for additional charging of the pixel unit to be charged, therefore, the superimposed signal of the compensated difference signal and the data signal to be charged can be determined as a signal for compensated charging to the pixel unit to be charged within the compensation charging period.

For example, when the data signal is a voltage signal, assuming that the data signal to be charged V0=3 volts, when the compensation difference signal ΔV=0.2 volts is determined, the compensation signal V=V0+ΔV=3.2 volts can be determined, and when the compensation difference is determined After the value signal ΔV=-0.2 volts, the compensation signal V=V0+ΔV=2.8 volts can be determined.

It should be noted that, when the gray scale difference is not within the range of the reference gray scale difference, the reference signal may be directly determined as the compensation signal. For example, when the gray scale difference is not within the range of the reference gray scale difference, the determining module can send a feedback signal to the control module, and after receiving the feedback signal, the control module can control the charging process of the pixel unit to be charged with the The reference signal is used to compensate and charge the pixel unit to be charged.

Wherein, the reference signal may be determined according to actual needs. For example, the reference signal may be a power signal for supplying power to the source driver circuit, and the power signal may include a high-voltage power signal and a low-voltage power signal. When the gray scale difference is not within the range of the reference gray scale difference, if the gray scale difference is negative, the low voltage power supply signal can be determined as the compensation difference signal corresponding to the gray scale difference, if the gray scale difference is positive value, the high-voltage power supply signal can be determined as the compensation difference signal corresponding to the gray scale difference. Alternatively, the reference signal may be a voltage signal converted by the level conversion circuit of the source driving circuit. For example, the reference signal may include a converted high voltage signal (such as 0.5 volts) and a low voltage signal (such as -0.5 volts). When the gray scale difference is not within the range of the reference gray scale difference, if the gray scale difference is a negative value , the low voltage signal can be determined as the compensation signal corresponding to the gray scale difference, and if the gray scale difference is positive, the high voltage signal can be determined as the compensation signal corresponding to the gray scale difference. And the amplitude of the high-voltage power signal, low-voltage power signal, high-voltage signal and low-voltage signal can be determined according to actual needs, for example, the high-voltage power signal can be 0.2 volts, 5 volts or 5.5 volts, and the low-voltage power signal can be It is -0.2 volts, -5 volts or -5.5 volts, the high voltage signal can be 0.5 volts, and the low voltage signal can be -0.5 volts, which is not specifically limited in this embodiment of the present invention.

Step 604, determine the compensation charging time period.

This step 604 can be implemented by the control module. After the control module determines the compensation charging period, it can control the charging of the pixel unit to be charged with the compensation signal during the compensation charging period, so that the pixel unit can be charged to the target voltage within the charging period of the pixel unit. There are many ways to implement step 604. In the embodiment of the present invention, the following two possible ways are taken as examples to illustrate:

In the first possible implementation manner, as shown in Figure 10, the implementation process may include:

Step 6041a, determine the target display partition where the pixel unit to be charged is located. The display panel includes: N display partitions arranged from near to far to the data signal end, the data signal end is used to provide data signals to multiple pixel units, the N is a positive integer greater than 1.

Optionally, the data signal terminal may be located at one end of the display panel. At this time, the distances from the pixel units at different positions in the display panel to the data signal end are different, so that when the data signal is transmitted from the data signal end to different pixel units, different degrees of transmission loss will occur, that is, the charging of the pixel unit Compared with the signal output by the data signal terminal, the data signal will be attenuated in different degrees. At this time, if the pixel units at different positions are compensated and charged according to the same duration, there will still be insufficiently charged pixel units. Therefore, the compensation charging period of the pixel unit can be determined according to the distance from the pixel unit to the data signal terminal, so that as many pixel units in the display panel as possible can meet the charging requirements, and further ensure the display effect of the display panel.

The display panel may include multiple display subregions. At this time, the distance from the pixel unit to the data signal terminal may be represented by the distance from the display subregion where the pixel unit is located to the data signal terminal. Moreover, the display partitions in the display panel can be divided according to the desired fineness of the displayed image, and the size of the display partitions can be determined according to the fineness. When partitioning the display panel, the display panel can be divided into N display partitions according to the size of the display partition and the distance from the pixel unit to the data signal terminal, and the position information of each display partition is recorded. When performing this step 6041a, the target position information of the pixel unit to be charged in the display panel can be obtained, and then the target position information is compared with the position information of N display partitions to determine the target display where the pixel unit to be charged is located. partition.

Step 6042a, determine the sequence of the target display partitions in the N display partitions arranged in sequence.

After the display panel is divided into N display partitions, the N display partitions can be sorted according to the sequence from near to far to the data signal end, so as to obtain the order of each display partition in the sorting. Correspondingly, after determining the target display partition where the pixel unit to be charged is located, the order of the target display partition in the N display partitions arranged in sequence can be determined.

Moreover, in order to further improve the charging effect of charging the pixel unit, during the charging period of the pixel unit, first use the compensation signal to perform compensation charging on the pixel unit to be charged, and then use the data signal to charge the pixel unit to be charged, so that during charging At the end of the period the charging process for the pixel cell to be treated can be stopped as desired. At this time, in order to reserve the duration of charging the pixel unit to be charged with the data signal to be charged in the charging period of the pixel unit, the duration of the compensation period of the pixel unit closest to the data signal terminal can be set to 0. Correspondingly, when sorting the display partitions according to the distance to the data signal end, the order of the pixel unit closest to the data signal end can be determined as 0, that is, sorting starts from 0.

As an example, FIG. 11 is a schematic partition diagram of a display panel provided by an embodiment of the present invention. The display panel is divided into 25 display partitions. The 25 display partitions have different distances from the data signal end. After the display partitions are sorted, the order of each display partition in the 25 display partitions is shown in the labels in the display partitions in Figure 11, that is, the smaller the label value of the display partition, the closer the distance between the display partition and the data signal terminal , the higher the order of the display partition among the 25 display partitions arranged in sequence. After determining that the target display partition where the pixel unit to be charged is located is the pixel unit in the upper left corner of the display panel, according to the labels shown in FIG. 11 , it can be determined that the order of the pixel unit to be charged in the 25 display partitions is 15. Wherein, the labels of different display partitions are the same, which means that the order of the different display partitions among the 25 display partitions is the same, that is, the distances from the different display partitions to the data signal end are the same.

Step 6043a, based on the order and the duration of the charging period of the pixel unit to be charged, determine the duration of the compensation charging period of the pixel unit to be charged, and determine the starting point of the charging period as the starting point of the compensation charging period.

Since the attenuation degree of the data signal charging the pixel unit is negatively correlated with the distance from the pixel unit to the data signal terminal, the compensation charging degree for different pixel units is positively correlated with the distance. The extent of the compensation charging for the pixel unit can be characterized by the duration of the compensation charging for the pixel unit, therefore, the duration of the compensation charging period for the pixel unit should be positively correlated with the distance. By performing different degrees of compensation and charging on different pixel units according to the distance from the pixel unit to the data signal terminal, it is possible to achieve the charging effect of the pixel unit at the far end and ensure that the pixel unit at the near end will not be overcharged. . Moreover, in order to ensure that the charging process of the pixel unit to be processed can be stopped as expected when the charging period ends, the starting point of the charging period can be determined as the starting point of the compensation charging period.

Optionally, the positive correlation between the duration t of the compensation charging period and the distance s can be represented by an order n. For example, when the order of the pixel unit closest to the data signal terminal is 0, the relationship can be expressed as t=[(t1-t2)×n]/N. The N is the total number of partitions displayed on the display panel. The t1 is the total time for charging the pixel unit. t2 is the duration of charge retention by the pixel electrode in the pixel unit under the action of charge retention or the like. The (t1-t2) indicates the duration of providing the data signal at the effective potential to the pixel unit, that is, the duration of the charging period of the pixel unit.

As an example, assuming that the total number N of display partitions in the display panel is 16, the order n of the target display partition where the pixel unit to be charged is located is 15, and the duration (t1-t2) of the charging period of the pixel unit is 4 microseconds, then the compensation The duration of the charging period t=[4×15]/16=3.75 microseconds.

Optionally, the duration control of the compensation charging period can be realized through a register. For example, the corresponding relationship between the sequence of the pixel units to be charged and the duration of the compensation charging period can be stored in the register, and the corresponding relationship between different sequences and durations can be represented by the value of the register. When the control module determines the corresponding duration of the pixel units to be charged , the register can be queried according to the sequence corresponding to the pixel unit to be charged to obtain the value corresponding to the pixel unit to be charged, and then in step 605 the pixel unit to be charged is controlled to be compensated and charged according to the value.

For example, when the display panel includes 25 display partitions, and the 25 display partitions correspond to 16 sequences, a 4-bit register can be used to control the duration of the compensation charging period. At this time, the value of the register, the display partition Please refer to Table 2 below for the corresponding relationship between the order of charging and the duration of the compensation charging period. When the order corresponding to the pixel unit to be charged is 15, by querying the register, the value corresponding to the pixel unit to be charged can be obtained as 1111, and then in step 605, the pixel unit to be charged is controlled to be compensated and charged according to the value 1111.

Table 2

value order duration value order duration 0000 0 0 1000 8 (t1-t2)8/16 0001 1 (t1-t2)/16 1001 9 (t1-t2)9/16 0010 2 (t1-t2)2/16 1010 10 (t1-t2)10/16 0011 3 (t1-t2)3/16 1011 11 (t1-t2)11/16 0100 4 (t1-t2)4/16 1100 12 (t1-t2)12/16 0101 5 (t1-t2)5/16 1101 13 (t1-t2)13/16 0110 6 (t1-t2)6/16 1110 14 (t1-t2)14/16 0111 7 (t1-t2)7/16 1111 15 (t1-t2)15/16

In the second possible implementation manner, as shown in Figure 12, the implementation process may include:

Step 6041b. Determine the first target distance from the pixel unit to be charged to the data signal terminal, and the data signal terminal is used to provide data signals to multiple pixel units.

Since the distance between the pixel unit and the data signal terminal is different, the data signal charging the pixel unit will have different degrees of attenuation compared with the signal output from the data signal terminal. Therefore, it is necessary to determine the compensation charging period of the pixel unit according to the distance from the pixel unit to the data signal terminal.

Optionally, the first target distance may be the linear distance between the pixel unit and the data signal terminal, or the length of the data line connecting the pixel unit and the data signal terminal, which is not specifically limited in the embodiment of the present invention . Since the attenuation of the data signal during transmission is mainly caused by the voltage drop of the data line, when the first target distance is the length of the data line connecting the pixel unit and the data signal end, the distance determined according to the first target distance Compensating the charging period can more accurately compensate for the insufficient charging caused by the attenuation of the data signal, and can further ensure the charging effect of the pixel unit.

Step 6042b. Determine a first ratio of the first target distance to the second target distance, where the second target distance is the distance from the pixel unit farthest from the data signal terminal among the plurality of pixel units to the data signal terminal.

Because the degree of compensation charging to the pixel unit is positively related to the distance from the pixel unit to the data signal terminal. And the degree of compensation charging to the pixel unit can be characterized by the compensation charging duration of charging the pixel unit, that is, the degree of compensation charging to the pixel unit is positively correlated with the compensation charging duration of charging the pixel unit. Therefore, the duration for performing compensation charging to the pixel unit to be charged can be determined according to the first ratio.

Step 6043b, based on the first ratio and the duration of the charging period of the pixel unit to be charged, determine the duration of the compensation charging period of the pixel unit to be charged, and determine the starting point of the charging period as the starting point of the compensation charging period.

Optionally, the duration of the compensation charging period and the first ratio may be positively correlated. For example, when a time period for charging the pixel unit to be charged with the data signal to be charged is reserved in the charging period of the pixel unit, the relationship between the duration t of the compensation charging period and the first ratio m1 can be expressed as: t=(t1- t2) × (m1-m2). The t1 is the total time for charging the pixel unit. The t2 is the duration of charge retention by the pixel electrode in the pixel unit under the action of charge retention or the like. The m2 is the ratio of the distance from the pixel unit closest to the data signal end to the data signal end and the distance to the second target. Moreover, in order to further improve the charging effect of charging the pixel units, the starting point of the charging period may be determined as the starting point of the compensation charging period.

It should be noted that since the second implementation method determines the duration of the compensation charging period according to the distance from the pixel unit to be charged to the data signal terminal, the division granularity of determining the duration of the compensation charging period is finer, and the charging effect can be fully realized. Finer adjustment further ensures the display effect of the display panel.

Step 605 , use the compensation signal to charge the pixel unit to be charged in the compensation charging period, and use the data signal to be charged to charge the pixel unit to be charged in other charging periods.

During the charging period of the pixel unit to be charged, first use the compensation signal to perform compensation charging on the pixel unit to be charged, and then use the data signal to charge the pixel unit to be charged, which can ensure that the pixel unit to be charged can be stopped as expected at the end of the charging period The charging process of the unit.

As an example, FIG. 13 is a timing diagram of charging pixel units in two adjacent scanning lines by using the charging method provided by the embodiment of the present invention. As shown in Figure 13, for the pixel unit to be charged in the Nth scanning line, since the gray scale difference of the pixel unit is a positive value, the compensation difference signal of the pixel unit is a positive value, and the compensation signal V12 of the pixel unit is greater than the The to-be-charged data signal V11 of the pixel unit. For the pixel unit to be charged in the N+1th scanning line, since the gray scale difference of the pixel unit is a negative value, the compensation difference signal of the pixel unit is a negative value, and the compensation signal V22 of the pixel unit is smaller than the pixel unit to be charged. Charging data signal V21. In turn, the compensation signal V12 is used to compensate and charge the to-be-charged pixel unit in the Nth scanning line in the compensation charging period tb1, and the to-be-charged pixel unit in the N-th scanning line is charged in the other charging period tq1 using the to-be-charged data signal V11, and the compensation charging period The sum of the duration of tb1 and the other charging period tq1 is equal to the duration tN of the charging period of the pixel unit to be charged in the Nth scanning row. And the compensation signal V22 is used to compensate and charge the pixel unit to be charged in the N+1th scanning line in the compensation charging period tb2, and the charging data signal V21 is used to charge the pixel unit to be charged in the N+1th scanning line in the other charging period tq2, and the The sum of the duration of the compensation charging period tb2 and other charging periods tq2 is equal to the duration t(N+1) of the charging period of the pixel unit to be charged in the N+1th scanning line. signal of.

Wherein, during the charging process of the pixel unit in the Nth scanning line, the schematic diagram of the voltage waveform of the pixel electrode in the pixel unit is shown in Figure 14. By comparing Figure 14 with Figure 4, it can be found that during the period t3 in Figure 14 The slope of the waveform is greater than the slope of the waveform in the period t3 in Figure 4. It can be seen that the charging method provided by the embodiment of the present invention can significantly reduce the charging delay time and increase the charging rate of the pixel unit, so that the pixel unit can be charged within the charging period of the pixel unit. The cells try to charge to the desired target voltage.

The principle of realizing above-mentioned steps 601 to 605 by each module in Fig. 8 is as follows:

As shown in Figure 8, the control module is also connected to the enable signal terminal E, when the enable signal terminal provides a low-level signal, the control module does not work, and the fifth switch submodule in Figure 8 is turned on, at this time , the data signal can charge the pixel unit through the first latch sub-module, the fifth switch sub-module and the second latch sub-module, etc., and all the switch sub-modules except the fifth switch sub-module are in the off state.

When the enable signal terminal provides a high-level signal, the control module works, and the corresponding switch sub-module can be controlled to conduct according to different requirements through the control module. In step 601, the control module may control the first switch submodule to be turned on, so that the first latch submodule can send a data signal to the acquisition module through the first switch submodule. In this way, in step 602 , the determination module can determine the compensation difference signal according to the charged data signal and the data signal to be charged, and then determine the compensation signal of the pixel unit to be charged in step 603 . And after the compensation charging period is determined by the control module in step 604, if the gray scale difference is within the reference gray scale difference range, in step 605, the control module controls the fifth switch submodule to close during the compensation charging period, and controls the second switch The sub-module is turned on during the compensation charging period, and passes the compensation signal to the second latch sub-module, and provides the compensation signal to the output terminal of the source drive circuit through the second latch sub-module and the level conversion module, etc., In order to provide the compensation signal to the pixel unit to be charged. Alternatively, if the gray scale difference is not within the range of the reference gray scale difference, when it is determined that the compensation signal is a high-voltage power supply signal supplying the source drive circuit, in step 605, the control module may control the fourth switch submodule to turn on, and provide the high-voltage power signal to the output terminal of the source driving circuit, so as to provide the high-voltage power signal to the pixel unit to be charged. Then after the compensation charging period ends, the control module controls the second switch submodule (or the fourth switch submodule) to turn off, and controls the fifth switch submodule to turn on. At this time, the data signal to be charged can be transmitted by the first latch submodule The module is output to the output terminal of the source driving circuit through the fifth switch submodule and the second latch submodule, so as to provide the to-be-charged data signal to the to-be-charged pixel unit.

To sum up, the charging method of the pixel unit provided by the embodiment of the present invention determines the compensation signal for charging the pixel unit to be charged, and uses the compensation signal to charge the pixel unit to be charged within the compensation charging period, and the compensation charging period is located in the pixel unit. During the charging period, compared with the related technology, the pixel unit can be compensated and charged, so that the pixel unit can be charged to the desired target voltage as much as possible during the charging period of the pixel unit, which can meet the charging requirements of the pixel unit and reduce the damage caused by insufficient charging. Influence on the display effect of the display panel.

It should be noted that the order of the steps of the charging method for the pixel unit provided by the embodiment of the present invention can be adjusted appropriately, and the steps can also be increased or decreased according to the situation. Within, any method that can be easily thought of as changing should be covered within the protection scope of the present application, so it will not be repeated here.

An embodiment of the present invention provides a charging device for a pixel unit. As shown in FIG. 15 , the device 900 may include:

The obtaining module 901 is used to obtain the data signal to be charged for charging the pixel unit to be charged, and the charged data signal for charging the pixel unit that has been charged. The pixel unit that has been charged and the pixel unit to be charged are connected by the same data line A data signal is provided, and the pixel unit to be charged is any one of a plurality of pixel units in the display panel.

The determining module 902 is configured to determine a compensation signal for charging the pixel unit to be charged based on the charged data signal and the to-be-charged data signal.

The control module 903 is configured to control the charging of the pixel unit to be charged by using the compensation signal within the compensation charging period, and the compensation charging period is within the charging period of the pixel unit.

To sum up, the charging device for the pixel unit provided by the embodiment of the present invention determines the compensation signal for charging the pixel unit to be charged through the determination module, and the control module uses the compensation signal to charge the pixel unit to be charged within the compensation charging period, and the compensation charging period Located within the charging period of the pixel unit, compared with related technologies, the pixel unit can be compensated for charging, so that the pixel unit can be charged to the desired target voltage as much as possible during the charging period of the pixel unit, which can meet the charging requirements of the pixel unit and reduce the charging time of the pixel unit. The effect of insufficient charging on the display effect of the display panel is small.

Optionally, as shown in FIG. 16, the determining module 902 may include:

The first determination sub-module 9021 is configured to determine the compensation difference signal based on the charged data signal and the to-be-charged data signal.

The second determination sub-module 9022 is configured to determine the superposition signal of the compensation difference signal and the data signal to be charged as the compensation signal.

Optionally, the first determining submodule 9021 is configured to:

Based on the charged data signal, the first display gray scale displayed by the charged pixel unit driven by the charged data signal is obtained.

Based on the to-be-charged data signal, the second display gray scale displayed by the to-be-charged pixel unit driven by the charged data signal is acquired.

Based on the gray scale difference between the first displayed gray scale and the second displayed gray scale, the compensation difference signal is determined.

Optionally, the first determining submodule 9021 is configured to:

If the grayscale difference is within the reference grayscale difference range, and when the grayscale difference is within [8×(p-1)+1, 8×p], determine the superimposed signal of the P compensation unit signals as the compensation difference Signal, P is a positive integer.

Optionally, the display panel includes a plurality of pixel units arranged in an array, the data lines are used to provide data signals to the pixel units located in the same scanning column, and the charged pixel unit is in the previous scanning line of the scanning line where the pixel unit to be charged is located. pixel unit.

Optionally, the determining module 902 is also used for:

Determine the target display partition where the pixel unit to be charged is located. The display panel includes: N display partitions arranged from near to far according to the data signal terminal. The data signal terminal is used to provide data signals to multiple pixel units, and N is greater than 1. positive integer.

Determine the sequence of the target display partitions among the N display partitions arranged in sequence.

Based on the order and the duration of the charging period, the duration of the compensation charging period is determined, and the starting point of the charging period is determined as the starting point of the compensation charging period.

Optionally, the charging period of the pixel unit also includes: other charging periods, and the control module 903 is further configured to: use the data signal to be charged to charge the pixel unit to be charged in other charging periods.

To sum up, the charging device for the pixel unit provided by the embodiment of the present invention determines the compensation signal for charging the pixel unit to be charged through the determination module, and the control module uses the compensation signal to charge the pixel unit to be charged within the compensation charging period, and the compensation charging period Located within the charging period of the pixel unit, compared with related technologies, the pixel unit can be compensated for charging, so that the pixel unit can be charged to the desired target voltage as much as possible during the charging period of the pixel unit, which can meet the charging requirements of the pixel unit and reduce the charging time of the pixel unit. The effect of insufficient charging on the display effect of the display panel is small.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described devices and modules can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

The embodiment of the present invention also provides a display device, which includes: the charging device for the pixel unit provided by the embodiment of the present invention.

The embodiment of the present invention also provides a storage medium, which may be a non-volatile computer-readable storage medium. When the instructions in the storage medium are executed by the processor of the terminal, the terminal is able to execute the information provided by the embodiment of the present invention. The charging method of the pixel unit.

The embodiment of the present invention also provides a computer program product containing instructions, when the computer program product is run on the computer, the computer is made to execute the method for charging the pixel unit provided by the embodiment of the present invention.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above embodiments can be completed by hardware, and can also be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium. The above-mentioned The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, and the like.

The above descriptions are only exemplary embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (6)

1. A method of charging a pixel cell, the method comprising:

acquiring a data signal to be charged for charging a pixel unit to be charged and a data signal to be charged for charging a pixel unit to be charged, wherein the pixel unit to be charged and the pixel unit to be charged are provided with data signals by the same data line, and the pixel unit to be charged is any one of a plurality of pixel units in a display panel;

acquiring a first display gray scale displayed by the charged pixel unit under the drive of the charged data signal based on the charged data signal;

acquiring a second display gray scale displayed by the pixel unit to be charged under the drive of the charged data signal based on the data signal to be charged;

determining a compensation difference signal based on a gray level difference of the first display gray level and the second display gray level;

determining the superposition signal of the compensation difference signal and the data signal to be charged as a compensation signal;

charging the pixel unit to be charged in a compensation charging period by adopting the compensation signal, wherein the compensation charging period is positioned in the charging period of the pixel unit;

Before said charging of said pixel cell to be charged with said compensation signal during a compensation charging period, said method further comprises:

determining a target display partition where the pixel unit to be charged is located, wherein the display panel comprises: n display partitions which are arranged from near to far to a data signal end, wherein the data signal end is used for providing data signals for the pixel units, and N is a positive integer greater than 1;

determining the order of the target display partition in N display partitions which are arranged in sequence;

determining the duration of the compensation charging period based on the sequence and the duration of the charging period, determining the starting point of the charging period as the starting point of the compensation charging period, and when the sequence of the pixel units nearest to the data signal end is 0, the duration of the compensation charging period of the pixel units meets t= [ (t 1-t 2) x N ]/N, wherein t is the duration of the compensation charging period, and (t 1-t 2) is the duration of the charging period, and N is the sequence;

the determining a compensation difference signal based on a gray level difference of the first display gray level and the second display gray level includes:

if the gray level difference is within a reference gray level difference range, and when the gray level difference is within [8× (P-1) +1,8×p ], determining a superimposed signal of P compensation unit signals as the compensation difference signal, wherein P is a positive integer;

The charging the pixel unit to be charged in the compensation charging period by adopting the compensation signal comprises the following steps:

charging the pixel units to be charged of one scanning line in a compensation charging period by adopting the compensation signal, and charging the pixel units to be charged of the one scanning line in other charging periods by adopting a data signal to be charged, wherein the sum of the time durations of the compensation charging period and the other charging periods is equal to the time duration of the charging period of the pixel units to be charged of the one scanning line;

when the gray level difference of the pixel units to be charged in the one scanning line is a positive value, the compensation difference signal of the pixel units to be charged in the one scanning line is a positive value, and the compensation signal of the pixel units to be charged in the one scanning line is larger than the data signals to be charged in the pixel units to be charged in the one scanning line; for the pixel units to be charged of the next scanning line, when the gray level difference of the pixel units to be charged of the next scanning line is a negative value and the compensation difference signal of the pixel units to be charged of the next scanning line is a negative value, the compensation signal of the pixel units to be charged of the next scanning line is smaller than the data signals to be charged of the pixel units to be charged of the next scanning line.

2. The method of claim 1, wherein the display panel includes a plurality of pixel cells arranged in an array, the data lines are configured to provide data signals to pixel cells located in a same scan column, and the charged pixel cells are pixel cells in a scan line preceding the scan line in which the pixel cells to be charged are located.

3. The method according to claim 1 or 2, wherein the charging period of the pixel cell further comprises: other charging periods, after said charging the pixel cell to be charged with the compensation signal in a compensation charging period, the method further comprises:

and charging the pixel unit to be charged in the other charging time periods by adopting the data signal to be charged.

4. A charging device for a pixel cell, the device comprising:

the device comprises an acquisition module, a display module and a charging module, wherein the acquisition module is used for acquiring a data signal to be charged for charging a pixel unit to be charged and a data signal to be charged for charging a pixel unit to be charged, the charged pixel unit and the pixel unit to be charged are provided with data signals by the same data line, and the pixel unit to be charged is any one of a plurality of pixel units in the display panel;

The determining module is used for acquiring a first display gray scale displayed by the charged pixel unit under the drive of the charged data signal based on the charged data signal; acquiring a second display gray scale displayed by the pixel unit to be charged under the drive of the charged data signal based on the data signal to be charged; determining a compensation difference signal based on a gray level difference of the first display gray level and the second display gray level; determining the superposition signal of the compensation difference signal and the data signal to be charged as a compensation signal, and determining the superposition signal of P compensation unit signals as the compensation difference signal when the gray level difference is within the range of the reference gray level difference and the gray level difference is within [8× (P-1) +1,8×p ], wherein P is a positive integer;

the control module is used for controlling the pixel unit to be charged in a compensation charging period by adopting the compensation signal, and the compensation charging period is positioned in the charging period of the pixel unit;

the determining module is further configured to:

determining a target display partition where the pixel unit to be charged is located, wherein the display panel comprises: n display partitions which are arranged from near to far to a data signal end, wherein the data signal end is used for providing data signals for the pixel units, and N is a positive integer greater than 1;

Determining the order of the target display partition in N display partitions which are arranged in sequence;

determining the duration of the compensation charging period based on the sequence and the duration of the charging period, determining the starting point of the charging period as the starting point of the compensation charging period, and when the sequence of the pixel units nearest to the data signal end is 0, the duration of the compensation charging period of the pixel units meets t= [ (t 1-t 2) x N ]/N, wherein t is the duration of the compensation charging period, and (t 1-t 2) is the duration of the charging period, and N is the sequence;

the control module is further configured to:

charging the pixel units to be charged of one scanning line in a compensation charging period by adopting the compensation signal, and charging the pixel units to be charged of the one scanning line in other charging periods by adopting a data signal to be charged, wherein the sum of the time durations of the compensation charging period and the other charging periods is equal to the time duration of the charging period of the pixel units to be charged of the one scanning line;

when the gray level difference of the pixel units to be charged in the one scanning line is a positive value, the compensation difference signal of the pixel units to be charged in the one scanning line is a positive value, and the compensation signal of the pixel units to be charged in the one scanning line is larger than the data signals to be charged in the pixel units to be charged in the one scanning line; for the pixel units to be charged of the next scanning line, when the gray level difference of the pixel units to be charged of the next scanning line is a negative value and the compensation difference signal of the pixel units to be charged of the next scanning line is a negative value, the compensation signal of the pixel units to be charged of the next scanning line is smaller than the data signals to be charged of the pixel units to be charged of the next scanning line.

5. The apparatus of claim 4, wherein the charging period of the pixel cell further comprises: and the control module is further used for controlling the data signal to be charged to charge the pixel unit to be charged in the other charging period after controlling the pixel unit to be charged in the compensation charging period by adopting the compensation signal.

6. A display device, characterized in that the display device comprises: a charging device for a pixel cell according to claim 4 or 5.

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