Display device and driving method based on display device

Abstract

The invention provides a display device and a driving method based on the display device, belongs to the technical field of display, and can solve the problem that the charging power consumption of a pixel unit in an existing display device is large. The display device comprises a plurality of scanning lines and a plurality of data lines, and the scanning lines and the data lines intersect to define a plurality of pixel units. Wherein in the charging stage of any row of pixel units, the charge sharing circuit is configured to independently connect the plurality of data lines connected with the charge sharing circuit with the source electrode driving chip; in the charge sharing stage of any row of pixel units, the control unit is configured to determine whether to short-circuit the data line connected with the control unit according to the data voltage written by the data line connected with the charge sharing circuit to the current row of pixel units and the data voltage to be written by the data line connected with the charge sharing circuit to the next row of pixel units.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of display, and particularly relates to a display device and a driving method based on the display device. Background Art

[0002] In recent years, with the growing demand for mobile office, electronic devices such as personal computers have thus developed rapidly, and the competition among manufacturers of personal computers has become increasingly fierce. Low-power personal computers have become a key factor in the competition among manufacturers.

[0003] During the operation of the display panel, the driving chip needs to charge each pixel unit in the display panel to achieve the corresponding display effect. The more the pixel unit is charged, the higher the power consumption. However, the existing methods for reducing the power consumption of the display device still cannot better reduce the power consumption of the display device. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art, and provides a display device with reduced power consumption and a driving method based on the display device.

[0005] In a first aspect, the technical solution adopted to solve the technical problems of the present invention is a display device, including a plurality of scan lines and a plurality of data lines, and the plurality of scan lines and the plurality of data lines intersect to define a plurality of pixel units; the pixel units in the same row are connected to the same scan line, and the pixel units in the same column are connected to the same data line; wherein,

[0006] the display device further includes a control unit, at least one charge sharing circuit, and a source driver chip; each charge sharing circuit is connected to a plurality of data lines, and the data lines connected by different charge sharing circuits are different;

[0007] During the charging stage of the pixel units in any row, the charge sharing circuit is configured to independently connect the plurality of data lines connected thereto to the source driver chip;

[0008] The control unit is configured to generate a first control signal according to the data voltage written to the pixel units in the current row and the data voltage to be written to the pixel units in the next row based on the data lines connected to the charge sharing circuit;

[0009] During the charge sharing stage of the pixel units in any row, the charge sharing circuit is further configured to determine whether to short-circuit the data lines connected thereto according to the first control signal.

[0010] In some embodiments, the control unit includes a first calculation unit and a first generation unit;

[0011] The first calculation unit is configured to calculate, according to the data voltage written to the pixel units in the current row by the data line connected to the charge sharing circuit and the data voltage to be written to the pixel units in the next row, the change value over time of the sum of the data voltage changes of the multiple data lines connected to the charge sharing circuit after short-circuiting the data line corresponding to the charge sharing circuit.

[0012] The first generation unit is configured to generate a first control signal based on the change value.

[0013] In some embodiments, the first generation unit includes a first determination module and a first generation module.

[0014] The first determination module is configured to determine that the states of the multiple data lines connected to the charge sharing circuit are non-conductive in response to the change value increasing over time; and determine that the states between the multiple data lines connected to the charge sharing circuit are conductive in response to the change value decreasing over time or the change value decreasing first and then increasing over time.

[0015] The first generation module is configured to generate the first control signal according to the conduction states of the multiple data lines connected to the charge sharing circuit.

[0016] In some embodiments, the conduction states between the multiple data lines connected to the charge sharing circuit are divided into 2^N conduction states, where N is the number of data lines connected to the charge sharing circuit, and N is a positive integer greater than or equal to 2. The first determination module includes a first calculation sub-unit and a first comparison sub-unit.

[0017] The first calculation sub-unit is configured to calculate the decreasing amplitude of the change value in response to the change value decreasing over time or the change value decreasing first and then increasing over time.

[0018] The first comparison sub-unit is configured to compare the decreasing amplitude of the change value with a preset amplitude value, and determine the conduction states between the multiple data lines connected to the charge sharing circuit according to the comparison result.

[0019] In some embodiments, the first comparison sub-unit is specifically configured to perform encoding based on the comparison result, and determine the conduction states between the multiple data lines connected to the charge sharing circuit according to the preset encoding-conduction state relationship.

[0020] In some embodiments, the data sharing circuit includes a first control signal line and a MOS transistor electrically connected to the data line, where the gate of the MOS transistor is electrically connected to the first control signal line, and the source and drain of the MOS transistor are respectively electrically connected to a data line.

[0021] The first control signal line is configured to output the first control signal to the MOS transistor during the charge sharing stage;

[0022] The MOS transistor is configured to be turned on under the control of the first control signal to short - circuit two connected data lines.

[0023] In some embodiments, the MOS transistor under the control of the first control signal includes four conduction states, namely 0% conduction, 33% conduction, 66% conduction, and 100% conduction.

[0024] In some embodiments, the control unit is further configured to generate the second control signal based on the position of the pixel unit to be charged, and / or based on the data voltage written to the pixel unit of the current row by the data line corresponding to the pixel unit to be charged, and the data voltage to be written to the pixel unit to be charged in the next row;

[0025] The source driver chip is configured to provide a data voltage to the data line connected thereto based on the second control signal.

[0026] In some embodiments, the control unit further includes a second calculation unit and a second generation unit,

[0027] The second calculation unit is configured to calculate a first distance between the pixel unit to be charged and the driving signal in the source driver chip based on the position of the pixel unit to be charged;

[0028] The second generation unit is configured to compare the first distance with a preset distance and generate the second control signal according to the comparison result.

[0029] In some embodiments, the second generation unit is specifically configured to compare the first distance with a preset distance, perform encoding according to the comparison result, and generate the second control signal according to a preset encoding - voltage level relationship.

[0030] In some embodiments, the control unit further includes a second calculation unit and a second generation unit,

[0031] The second calculation unit is configured to calculate a first difference between the data voltage written to the pixel unit of the current row by the data line corresponding to the pixel unit to be charged and the data voltage to be written to the pixel unit to be charged in the next row;

[0032] The second generation unit is configured to generate the second control signal based on the first difference and a preset pixel unit data voltage difference - data voltage level relationship.

[0033] In some embodiments, the source driver chip includes a second control signal line and a plurality of operational amplifiers, wherein one operational amplifier is connected to one data line;

[0034] The second control signal line is configured to output the second control signal to the plurality of operational amplifiers during the charging phase of any row of the pixel units;

[0035] The operational amplifier is configured to provide a data voltage to the data line connected thereto based on the second control signal.

[0036] In some embodiments, the second control signal provides the same data voltage to multiple data lines connected to the same charge sharing circuit.

[0037] In a second aspect, an embodiment of the present disclosure provides a driving method based on a display device. The display device includes a plurality of scan lines and a plurality of data lines. The plurality of scan lines and the plurality of data lines intersect to define a plurality of pixel units. The pixel units in the same row are connected to the same scan line, and the pixel units in the same column are connected to the same data line. The display device further includes a control unit, at least one charge sharing circuit, and a source driver chip. Each charge sharing circuit is connected to multiple data lines, and the data lines connected by different charge sharing circuits are different. The driving method includes:

[0038] During the charging phase of any row of the pixel units, the charge sharing circuit independently connects the multiple data lines connected thereto to the source driver chip;

[0039] The control unit generates a first control signal according to the data voltage written to the pixel units in the current row based on the data lines connected to the charge sharing circuit, and the data voltage to be written to the pixel units in the next row;

[0040] The charge sharing circuit determines whether to short-circuit the data lines connected thereto according to the first control signal. Description of the Drawings

[0041] Figure 1 It is a voltage change curve diagram during the charging process of sub-pixels in the prior art;

[0042] Figure 2 It is a voltage change curve diagram of sub-pixels during the charging process of sub-pixels when charge sharing occurs;

[0043] Figure 3 It is a schematic diagram of a display device provided by an embodiment of the present disclosure;

[0044] Figure 4 It is a schematic diagram of another display device provided by an embodiment of the present disclosure;

[0045] Figure 5 Schematic diagram of another display device provided by an embodiment of the present disclosure;

[0046] Figure 6 Flowchart of a driving method based on a display device provided by an embodiment of the present disclosure;

[0047] Figure 7 Flowchart of another driving method based on a display device provided by an embodiment of the present disclosure. Detailed implementation manners

[0048] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0049] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure belongs. The "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0050] During the operation of the display panel, the source driver chip needs to charge each sub-pixel in the panel to achieve the corresponding display effect. The more the sub-pixel is charged, the higher the power consumption. To reduce this part of the power consumption, in a thin film transistor liquid crystal display (TFT-LCD), the embodiments of the present disclosure adopt a charge sharing (CS) method. During the interval between data scans of two rows of sub-pixels, two or more data lines are briefly turned on to allow charge to flow, achieve voltage balance, and make the power consumption of the source driver chip Source Driver smaller when driving the data of this row.

[0051] Figure 1 Curve graph of voltage change during the charging process of sub-pixels in the traditional technology. Figure 2It is a graph showing the change of the sub-pixel voltage during the charging process of the sub-pixel when there is charge sharing. Among them, the vertical coordinate represents the pixel voltage of the sub-pixel, and the horizontal coordinate represents the charging time for charging the sub-pixel.

[0052] Suppose the starting voltage of a certain sub-pixel at the starting time t1 is v1, and this sub-pixel needs to be charged to v2. Using the traditional charging method, as Figure 1 shown, correspondingly, it needs to be charged from v1 to v2, and the charging completion time is t2. When using the charge sharing (CS) method for sub-pixel charging, Figure 2 shown, after charge sharing, the starting voltage of the sub-pixel at the starting time t1 changes from v1 to v3, and v3 is the sub-pixel voltage after CS. This sub-pixel only needs to be charged from v3 to v2. Compared with v1, v3 is closer to v2, and the CS method reduces the voltage swing during the sub-pixel charging process, achieving power consumption savings.

[0053] An embodiment of the present disclosure provides a display device, Figure 3 which is a schematic diagram of a display device provided by an embodiment of the present disclosure. As Figure 3 shown, the display device includes a plurality of scan lines 2 and a plurality of data lines 1. The plurality of scan lines 2 and the plurality of data lines 1 intersect to define a plurality of pixel units 10; the pixel units 10 in the same row are connected to the same scan line 2, and the pixel units 10 in the same column are connected to the same data line 1; wherein, the display device further includes a control unit 4, at least one charge sharing circuit 3, and a source driver chip 5; each charge sharing circuit 3 is connected to a plurality of data lines 1, and the data lines 1 connected by different charge sharing circuits 3 are different; during the charging stage of any row of pixel units 10, the charge sharing circuit 3 is configured to independently connect the plurality of data lines 1 connected thereto to the source driver chip 5; the control unit 4 is configured to generate a first control signal 410 according to the data voltage written to the current row of pixel units 10 by the data lines 1 connected to the charge sharing circuit 3, and the data voltage to be written to the next row of pixel units 10; during the charge sharing stage of any row of pixel units 10, the charge sharing circuit 3 is further configured to determine whether to short-circuit the data lines 1 connected thereto according to the first control signal 410.

[0054] Specifically, when the display device is displaying, the scan line 2 corresponding to the current row of pixel units 10 is turned on, and the source driver chip 5 in the display device charges a whole row of pixel units 10 to their respective required voltages to display different gray levels. When this row of charging is completed, the scan line 2 of the next row is activated and outputs the next row of scan drive signals, so that the data line 1 charges the pixel units 10 of the next row. This continues until the charging of the last row is completed.

[0055] Among them, each data line 1 is electrically connected to the source driver chip 5, so that each data line 1 individually charges the pixel unit 10 corresponding to the data line 1. At the same time, the charge sharing circuit 3 is electrically connected to multiple data lines 1, and whether the charge sharing circuit 3 is turned on or off is used to control whether the multiple data lines 1 electrically connected to the charge sharing circuit 3 are short-circuited. The scanning period of each row of pixel units 10 includes a scanning stage and a charge sharing stage. In the scanning stage, the charge sharing circuit 3 is in a non-conductive state, and the data line 1 loads a data voltage to charge the pixel unit 10 corresponding to the data line 1; in the charge sharing stage, the charge sharing circuit 3 is in a conductive state, short-circuiting the multiple data lines 1, so that charge sharing occurs between the short-circuited data lines 1. That is, the charge sharing stage is during the interval between the scanning of two rows of data. In the charge sharing stage, the charge sharing circuit 3 briefly connects the multiple data lines 1, allowing charge to flow between the connected multiple data lines 1 to change the voltage of the multiple data lines 1, reducing the voltage swing during the charging process of the pixel unit 10 and achieving power consumption savings.

[0056] In the charge sharing stage, after the multiple data lines 1 connected by the charge sharing circuit 3 are short-circuited, if the data voltage of a certain data line 1 increases, according to the principle of charge balance, there must be another data line 1 whose data voltage decreases at the same time. Then, the charging voltage required for the data line 1 with the decreased data voltage to reach the data voltage to be written into the pixel unit may increase. Only when the total charging voltage required for the multiple data lines 1 connected by the charge sharing circuit 3 is less than the total charging voltage required when the multiple data lines 1 are not connected by the charge sharing circuit 3 after the multiple data lines 1 connected by the charge sharing circuit 3 are short-circuited, will the voltage swing during the charging process of the pixel unit 10 be reduced, achieving power consumption savings. Among them, the charging voltage required for the data line 1 is related to the data voltage written by the data line 1 to the pixel unit 10 in the current row and the data voltage to be written by the pixel unit in the next row.

[0057] For example, Figure 4 is a schematic diagram of a display device provided by an embodiment of the present disclosure. As Figure 4 shown, the display device includes a first data line 11, a second data line 12, a first scan line 21, a second scan line 22, and a first pixel unit 101, a second pixel unit 102, a third pixel unit 201, and a fourth pixel unit 202 defined by the four. The charge sharing circuit 3 electrically connects the first data line 11 and the second data line 12. The first scan line 21 first scans the first row of pixel units, and the first data line 11 and the second data line 12 respectively charge the first pixel unit 101 and the second pixel unit 10 to the required data voltage.

[0058] Assume that the data voltage written by the first data line 11 to the first pixel unit 101 is 1V, and the data voltage written by the second data line 12 to the second pixel unit 102 is 5V; the data voltage to be written to the third pixel unit 201 is 4V, and the data voltage to be written to the fourth pixel unit 202 is 3V. Then, when the second scan line 22 scans the pixel units in the second row, the first data line 11 needs to increase from the current 1V to 4V to charge the third pixel unit 201. The current data voltage in the second data line 12 is 5V, which can meet the required data voltage of 3V for the fourth pixel unit 202. That is, after charging the pixel units in the first row, an additional power consumption corresponding to 3V voltage is required to charge the pixel units in the second row. After charging the pixel units in the first row, the charge sharing circuit 3 electrically connects the first data line 11 and the second data line 12 for charge sharing. After charge sharing, the voltage of the first data line becomes 3V, and at the same time, the voltage of the second data line also becomes 3V. At this time, the first data line 11 needs to increase from the current 3V to 4V to charge the third pixel unit 201. The current data voltage in the second data line 12 is 3V, which can meet the required data voltage of 3V for the fourth pixel unit 202. That is, after charging the pixel units in the first row, an additional power consumption corresponding to 1V voltage is required to charge the pixel units in the second row. After charge sharing, the voltage swing during the charging process of the pixel unit is reduced, achieving power consumption savings.

[0059] Similarly, assume that the data voltage to be written to the third pixel unit 201 is 1V, and the data voltage to be written to the fourth pixel unit 202 is 8V. Then, when the second scan line 22 scans the pixel units in the second row, the current 1V of the first data line 11 meets the required data voltage of 1V for the third pixel unit 201. The second data line 12 needs to be charged from the current data voltage of 5V to 8V. That is, after charging the pixel units in the first row, an additional power consumption corresponding to 3V voltage is required to charge the pixel units in the second row. Assume that after charging the pixel units in the first row, the charge sharing circuit 3 electrically connects the first data line 11 and the second data line 12 for charge sharing. After charge sharing, the voltage of the first data line becomes 3V, and at the same time, the voltage of the second data line also becomes 3V. At this time, the first data line 11 still meets the required data voltage for charging the third pixel unit 201, while the second data line 12 needs to be charged from the current 3V to 8V. That is, after charging the pixel units in the first row, an additional power consumption corresponding to 5V voltage is required to charge the pixel units in the second row. After charge sharing, the voltage swing during the charging process of the pixel unit becomes larger, and the power consumption is also greater.

[0060] In the embodiments of the present disclosure, the charge sharing circuit 3 needs to determine whether to short-circuit the data lines connected thereto according to the data voltage written to the current row pixel units 10 by the data lines 1 connected to the charge sharing circuit 3 and the data voltage to be written to the next row pixel units 10, so as to ensure that after short-circuiting the data lines connected thereto during the charge sharing stage, the voltage swing during the charging process of the pixel units is reduced. Thus, before the scanning stage of the pixel units 10 in the next row of the current row arrives, the effect of pre-charging the pixel units 10 in the next row of the current row is achieved. The power consumption of the source driver chip 5 when driving the data of this row is smaller, realizing the effect of power saving.

[0061] In some embodiments, the control unit 4 includes a first calculation unit 411 and a first generation unit 412; the first calculation unit 411 is configured to calculate the change value of the sum of the data voltage changes of the multiple data lines 1 connected to the charge sharing circuit 3 over time after short-circuiting the data line 1 corresponding to the charge sharing circuit 3 according to the data voltage written to the current row pixel units 10 by the data line 1 connected to the charge sharing circuit 3 and the data voltage to be written to the next row pixel units 10; the first generation unit 412 is configured to generate a first control signal 410 based on the change value.

[0062] Specifically, after short-circuiting the data line 1 corresponding to the charge sharing circuit 3, it takes a certain amount of time for the charge to complete the charge sharing. As the charge flows between the short-circuited multiple data lines 1, the data voltage of the multiple data lines 1 connected to the charge sharing circuit 3 changes continuously over time. Therefore, the sum of the data voltage changes Δgray of the multiple data lines 1 connected to the charge sharing circuit 3 is a function of time. Among them, the change trend of Δgray determines the conduction state of the charge sharing circuit 3, and this conduction state determines the final data voltage value of the multiple data lines 1 connected to the charge sharing circuit 3 after the charge sharing is completed. Further, it determines the magnitude of the charging voltage required during the charging process of the next row pixel units 10. According to the charging voltage required during the charging process of the next row pixel units 10, it is determined whether power consumption can be saved after short-circuiting the data lines connected to the charge sharing circuit 3.

[0063] In some embodiments, the data voltage difference between the data voltage written to the current row pixel units by the multiple data lines 1 connected to the charge sharing circuit 3 and the data voltage to be written to the next row pixel units can be represented by the difference between the gray level of the current row pixel units 10 corresponding to the multiple data lines 1 connected to the charge sharing circuit 3 and the gray level value of the next row pixel units.

[0064] Specifically, different display gray values of the pixel unit 10 require different data voltages. The larger the display gray value, the larger the required data voltage. Therefore, the data voltage change value of the data voltage written to the current row of pixel units 10 and the data voltage to be written to the next row of pixel units 10 can be represented by the difference between the gray value of the current row of pixel units 10 and the gray value of the next row of pixel units 10.

[0065] In some embodiments, the data voltage change value of the data voltage written to the current row of pixel units by the multiple data lines 1 connected to the charge sharing circuit 3 and the data voltage to be written to the next row of pixel units can be represented by the following formula, and the formula includes a total of N absolute value formulas:

[0066] Δgray=|P 10 –P 20 |+|P 11 –P 21 |+|P 12 –P 22 |+|P 13 –P 23 |+|P 14 –P 24 |+|P 15 –P 25 |+……

[0067] Wherein, N is the number of the multiple data lines 1 connected to the charge sharing circuit 3, Δgray represents the sum of the differences between the gray values of the current row of pixel units and the gray values of the next row of pixel units of the multiple data lines 1 connected to the charge sharing circuit 3, and P 1X represents the gray value of each pixel unit 10 in the current row of pixel units 10, and P 2X represents the gray value of each pixel unit 10 in the next row of pixel units 10.

[0068] In some embodiments, the first generation unit 412 includes a first determination module and a first generation module. The first determination module is configured to determine that the state of the multiple data lines 1 connected to the charge sharing circuit 3 is non-conductive in response to the change value increasing with time; determine that the state between the multiple data lines 1 connected to the charge sharing circuit 3 is conductive in response to the change value decreasing with time or the change value decreasing first and then increasing with time; the first generation module is configured to generate a first control signal 410 according to the conduction state of the multiple data lines 1 connected to the charge sharing circuit 3.

[0069] Specifically, the change value of the sum Δgray of the data voltage changes of the multiple data lines 1 connected to the charge sharing circuit 3 over time may have the following possible change trends: 1) increasing over time; 2) decreasing slightly first and then increasing significantly over time; 3) decreasing significantly first and then increasing slightly over time; 4) decreasing continuously over time, etc. The Δgray after charge sharing represents the sum of the gray value (or data voltage) changes during the switching process of two rows of pixel units. Therefore, we hope that Δgray is as small as possible. Thus, according to the change trend of Δgray over time, it is determined whether to short-circuit the multiple data lines 1 connected to the charge sharing circuit 3 to ensure that Δgray takes a smaller value after charge sharing. When the multiple data lines 1 connected to the charge sharing circuit 3 are short-circuited, if Δgray increases, it means that the power consumption increases after charge sharing. Then, it is determined that the state of the multiple data lines 1 connected to the charge sharing circuit 3 is non-conductive, and the first control signal 410 is required to control the corresponding charge sharing circuit switch to disconnect. Conversely, if after the multiple data lines 1 connected to the charge sharing circuit 3 are short-circuited, Δgray decreases slightly, and after Δgray decreases to the minimum value, it gradually increases, or Δgray decreases significantly, then it is determined that the state of the multiple data lines 1 connected to the charge sharing circuit 3 is conductive, and the first control signal 410 is required to control the corresponding charge sharing circuit switch to turn on.

[0070] In some embodiments, the conduction states between the multiple data lines 1 connected to the charge sharing circuit 3 are divided into 2^N conduction states, where N is the number of data lines 1 connected to the charge sharing circuit 3, and N is a positive integer greater than or equal to 2. The first determination module includes a first calculation sub-unit and a first comparison sub-unit; the first calculation sub-unit is configured to calculate the reduction amplitude of the change value in response to the change value decreasing over time or decreasing first and then increasing over time; the first comparison sub-unit is configured to compare the reduction amplitude of the change value with a preset amplitude value and determine the conduction state between the multiple data lines connected to the charge sharing circuit 3 according to the comparison result.

[0071] Among them, the multiple conduction states refer to the conduction degree between the multiple data lines connected to the charge sharing circuit 3. For example, it includes 0% conduction, 100% conduction, and partial conduction. 0% conduction means non-conduction between the multiple data lines connected to the charge sharing circuit 3; 100% conduction means complete conduction between the multiple data lines connected to the charge sharing circuit 3, that is, after the charge sharing stage is completed, the data voltages of the multiple data lines connected to the charge sharing circuit 3 are equal; partial conduction means charge sharing occurs between the multiple data lines connected to the charge sharing circuit 3, and after the charge sharing stage is completed, the data voltages of the multiple data lines connected to the charge sharing circuit 3 do not reach equality. In addition, according to the number of conduction states, this partial conduction can be divided into multiple partial conduction states such as 30% conduction, 60% conduction, 80% conduction, etc.

[0072] Specifically, since the change values of the data voltages of the current row pixel units 10 and the data voltages required by the next row pixel units 10 are different, when the conduction states between multiple data lines are 100% conductive, it is not necessarily the charge sharing method with the minimum power consumption. Still taking Figure 4 as an example, assume that the data voltage written by the first data line 11 to the first pixel unit 101 is 2V, and the data voltage written by the second data line 12 to the second pixel unit 102 is 6V; the data voltage to be written to the third pixel unit 201 is 3V, and the data voltage to be written to the fourth pixel unit 202 is 5V. Then, after charging the first row of pixel units, the charge sharing circuit 3 electrically connects the first data line 11 and the second data line 12 for charge sharing. After 100% conduction of the charge sharing circuit, the voltage of the first data line becomes 4V, and at the same time, the voltage of the second data line also becomes 4V. At this time, the first data line 11 meets the data voltage 3V required by the third pixel unit 201, and the second data line 12 needs to be charged from 4V to 5V. That is, after charging the first row of pixel units and achieving 100% conduction of charge sharing, it is necessary to charge the second row of pixel units by 1V. If the charge sharing circuit is partially conductive, for example, after charge sharing, when the voltage of the first data line becomes 3V and the voltage of the second data line also becomes 5V, the charge sharing stage is completed. At this time, the voltages of the first data line and the second data line can both meet the data voltage requirements of the second row of pixel units, without additional charging, which saves more power.

[0073] Therefore, it is necessary to select different charge sharing gears according to the change trend of Δgray over time, and control the charge sharing speed to ensure that Δgray just takes a smaller value after charge sharing. Specifically, after short - circuiting multiple data lines 1 connected to the charge sharing circuit 3, Δgray decreases less, and gradually increases after decreasing to the minimum value. In this case, it is necessary to control the charge sharing gear according to the first control signal 410, give a smaller gear to the charge sharing circuit 3, and control Δgray after charge sharing to be smaller. If after short - circuiting multiple data lines 1 connected to the charge sharing circuit 3, Δgray decreases more, then it is necessary to control the charge sharing gear according to the first control signal 410, give a larger gear to the charge sharing circuit 3, so that the charge sharing process is completed faster, and this process saves the power consumption of the Source Driver.

[0074] Among them, the number of conduction states between data lines can be set according to the number of data lines 1 connected to the charge sharing circuit 3.

[0075] In some embodiments, the conduction state between the data lines can be controlled by controlling the magnitude of the input voltage of the charge sharing circuit, so as to control its conduction state and achieve gear control. According to the magnitude of the decrease in the change value of the current row pixel unit 10 and the next row pixel unit 10, the gear of the input voltage of the charge sharing circuit is determined to ensure that the Δgray can obtain a relatively small value after charge sharing, thereby reducing power consumption.

[0076] In some embodiments, the conduction state between the data lines can also be controlled by controlling the charge sharing time of the charge sharing circuit, so as to control its conduction state and achieve gear control. Specifically, according to the change trend of Δgray over time, different charge sharing times are selected to ensure that the Δgray can obtain a relatively small value after charge sharing.

[0077] In some embodiments, the types of conduction states of the multiple data lines 1 connected to the charge sharing circuit 3 can be flexibly set according to actual needs, such as being set to 2N or other values, and the present disclosure does not limit this.

[0078] In some embodiments, the first comparison sub-unit is specifically configured to perform encoding based on the comparison result and determine the conduction state between the multiple data lines 1 connected to the charge sharing circuit 3 according to the preset encoding-conduction state relationship.

[0079] The embodiments of the present disclosure can adopt an encoding method to control the conduction state of the charge sharing circuit 3. Specifically, each data line 1 corresponds to one bit, and the N data lines connected to the charge sharing circuit 3 correspond to N bits. The N bits can have 2^N combinations, and each combination can correspond to a conduction state. A first control signal is generated according to the conduction state to control the conduction between the N data lines connected to the charge sharing circuit 3. For example, in the display device, the gray level of each column of pixel units 10 is represented by M-bit data. The embodiments of the present disclosure can additionally add 1 bit of data on the basis of the M-bit data. After N M / M+1-bit encodings, N bits of additional data will be added to the N columns where the N data lines connected to the charge sharing circuit 3 are located, which are used to represent the 2^N conduction states between the N data lines connected to the charge sharing circuit 3, and are controlled by generating a first control signal. In some embodiments, the N bits of additional data after M / M+1-bit encoding can be at any position in the original M bits, and the present disclosure does not limit this at all.

[0080] In some embodiments, the charge sharing circuit 3 can electrically connect 2 or N data lines 1 to determine whether to short-circuit the connected data lines according to the first control signal 410 during the charge sharing stage. Among them, N can select an appropriate N value by comprehensively considering the hardware computing power and the demand for the number of conduction states during the charge sharing process.

[0081] In some embodiments, the charge sharing circuit 3 includes a first control signal line and a MOS transistor electrically connected to the data line 1. Among them, the gate 301 of the MOS transistor is electrically connected to the first control signal line, and the source 302 and the drain 303 of the MOS transistor are respectively electrically connected to a data line 1; the first control signal line is configured to output a first control signal 410 to the MOS transistor during the charge sharing stage; the MOS transistor is configured to be turned on under the control of the first control signal 410 to short-circuit the two connected data lines 10.

[0082] Specifically, when N = 2, the charge sharing circuit 3 can control whether the two data lines are short-circuited through the on-state of the MOS transistor.

[0083] In some embodiments, the MOS transistor has four on-states under the control of the first control signal 410, which are 0% on, 33% on, 66% on, and 100% on respectively.

[0084] Specifically, 0% on means that the multiple data lines 1 connected to the charge sharing circuit 3 are not short-circuited and are in a non-conductive state; 100% on means that after the charge sharing stage ends, the charges of the multiple data lines 1 connected to the charge sharing circuit 3 are equal, reaching charge balance, that is, the data voltages are equal. 33% on and 66% on mean that under the control of the first control signal 410, after the charge sharing stage ends, the charge flow of the multiple data lines 1 connected to the charge sharing circuit 3 is 33% and 66% of the 100% on state. At this time, the charges of the multiple data lines 1 connected to the charge sharing circuit 3 may not be equal.

[0085] In some embodiments, the on-state of the MOS transistor during the charge sharing process can be obtained by data encoding. In the embodiments of the present disclosure, the two data lines connected to the MOS transistor respectively correspond to 1 bit of data, and four first control signals 00, 01, 10, and 11 can be obtained. The four first control signals can respectively represent four different on-states of the MOS transistor. As shown in Table 1, the first control signals obtained by different encodings represent different on-states of the MOS transistor. Specifically, through the first control signal 410, the gate voltage of the MOS transistor is controlled to control its on-state and achieve gear control.

[0086] Table 1 MOS conduction states corresponding to the first control signal obtained by encoding

[0087]

[0088] In some embodiments, when N = 2, the MOS transistor can also be replaced with a single-pole double-throw switch to control the connection state of the two data lines connected thereto.

[0089] In some embodiments, when N = 3 and there are three data lines connected to the charge sharing circuit 3, the MOS transistor can also be replaced with a single-pole double-throw switch to control the connection states of the three data lines connected thereto.

[0090] In some embodiments, when N is greater than 3, the sharing circuit may further include a plurality of MOS transistors to control the connection states of the N data lines connected thereto.

[0091] In some embodiments, the control unit 4 is further configured to generate a second control signal 420 based on the position of the pixel unit 10 to be charged, and / or based on the data voltage written to the current row of pixel units 10 by the data line 1 corresponding to the pixel unit 10 to be charged, and the data voltage to be written to the pixel unit 10 to be charged in the next row. The source driver chip 5 is configured to provide a data voltage to the data line 1 connected thereto based on the second control signal 420.

[0092] Specifically, the data voltage provided by the source driver chip 5 to the data line 1 connected thereto needs to satisfy the charging voltage required for the corresponding pixel unit 10 to display, so as to ensure the normal display of the pixel unit 10. At the same time, if the data voltage provided by the source driver chip 5 to the data line 1 connected thereto is too large, it will also cause waste. In order to ensure normal display of the pixel unit while saving power consumption, it is necessary to generate a second control signal 420 based on the position of the pixel unit 10 to be charged, and / or based on the data voltage written to the current row of pixel units 10 by the data line 1 corresponding to the pixel unit 10 to be charged, and the data voltage to be written to the pixel unit 10 to be charged in the next row, to control the magnitude of the data voltage provided by the source driver chip 5 to the data line 1 connected thereto. Among them, the charging voltage required for the pixel unit 10 to display is related to the current data voltage of the data line 1 and the data voltage required to charge the pixel unit 10 to be charged. That is, it is related to the data voltage written to the current row of pixel units 10 and the data voltage to be written to the pixel unit 10 to be charged in the next row. It should be noted that the current data voltage of the data line 1 is the data voltage corresponding to the current pixel unit 10 display when charge sharing is not performed; the current data voltage of the data line 1 is the data voltage corresponding to the data line 1 after charge sharing when charge sharing is performed.

[0093] The pixel units 10 in different rows are at different distances from the driving signal in the source driver chip 5. Even if the charging voltages required for multiple pixel units 10 to display are the same, due to factors such as the resistance of the data line 1, the voltages consumed during the charging process are different. Therefore, for different positions of the pixel unit 10 to be charged, different data voltages also need to be provided, that is, different thrust gears need to be provided to ensure that the thrust gear provided by the source driver chip 5 can meet the data voltage required for the display of the pixel unit 10.

[0094] In some embodiments, the control unit 4 further includes a second calculation unit 421 and a second generation unit 422. The second calculation unit 421 is configured to calculate a first distance between the pixel unit 10 to be charged and the driving signal in the source driver chip 5 based on the position of the pixel unit 10 to be charged. The second generation unit 422 is configured to compare the first distance with a preset distance and generate the second control signal according to the comparison result.

[0095] Specifically, the greater the first distance between the pixel unit 10 to be charged and the driving signal in the source driver chip 5, the greater the resistance in the corresponding data line 1, and the greater the voltage consumed. At this time, a larger data voltage is required for the pixel unit 10 closer to the driving signal in the source driver chip 5. In some embodiments, the correspondence between the distance between the pixel unit 10 and the driving signal in the source driver chip 5 and the voltage is pre-stored in the display device. The second generation unit 422 can generate the second control signal 420 according to the first distance between the pixel unit 10 to be charged and the driving signal in the source driver chip 5, and the pre-stored correspondence between the distance between the pixel unit 10 and the driving signal in the source driver chip 5 and the voltage, so as to control the source driver chip 5 to provide a data voltage to the data line 1 connected thereto based on the second control signal 420.

[0096] In some embodiments, the position of the current driving signal can be determined according to the number of horizontal synchronization signals sent by the Tcon to the source driver chip 5, and then the first distance between the pixel unit and the current driving signal can be determined.

[0097] In some embodiments, the second generation unit 422 is specifically configured to compare the first distance with a preset distance, perform encoding according to the comparison result, and generate a second control signal according to a preset encoding-voltage level relationship.

[0098] Specifically, when the first distance between the pixel unit and the current driving signal is different, the resistance in the corresponding data line 1 is different when charging the pixel unit, and the consumed voltage is also different. The greater the first distance, the greater the thrust level of the required driving signal under the same other conditions. Conversely, the smaller the first distance, the smaller the thrust level of the required driving signal under the same other conditions. Similar to the multiple conduction states among the above-mentioned multiple data lines 1, in the embodiments of the present disclosure, different thrust levels can be selected according to the comparison result of the first distance and the preset distance. Specifically, the distance between the pixel unit and the current driving signal is divided into multiple range segments, each range segment corresponds to a thrust level, and the corresponding thrust level is selected according to the range where the first distance is located.

[0099] In some embodiments, encoding is performed based on the comparison result between the first distance and the preset distance, and a second control signal is generated according to the relationship between the preset encoding-voltage level to control the source driver chip 5 to provide a corresponding data voltage. Specifically, similar to the encoding of the conduction state of the charge sharing circuit described above, one data line can correspond to 1 bit of data, and N data lines correspond to N bits of data. There are 2^N combinations, and each combination can correspond to an encoding for representing a thrust level to control the source driver chip 5 to provide a corresponding data voltage to the corresponding data line. Among them, an appropriate value of N can be selected according to the specific requirements of the hardware computing power and the number of thrust levels.

[0100] Figure 5 Schematic diagram of a display device provided by an embodiment of the present disclosure. As Figure 5 shown, taking N = 2 as an example, assume that the magnitude of the data voltage change of the pixel unit 10 in state 2 and state 3 is exactly the same, but the pixel unit 10 corresponding to state 3 is closer to the driving signal (OP in the figure) in the source driver chip 5. Therefore, the thrust level used in state 3 should be less than the thrust level used in state 2.

[0101] Table 2 shows the corresponding relationship between the comparison result of the first distance between the pixel unit 10 to be charged and the driving signal in the source driver chip 5 and the preset distance, and the second control signal generated by the encoding. Taking N = 2 as an example, the comparison result is encoded with 2-bit data, and the driving signal level in the source driver chip 5 can record 4 level states. The display panel can be equally divided into 4 rows from the far end of the driving signal in the source driver chip 5, and the 4 sub-regions have their respective driving signal level states.

[0102] Table 2 Corresponding relationship between the comparison result of the first distance between the pixel unit to be charged and the driving signal in the source driver chip and the preset distance, and the second control signal generated by the encoding

[0103] By analogy, similar to the multiple conduction states among N data lines 1, the control of the driving signal level in the source driver chip 5 can also be extended to encoding N 1-bit data. The total number of thrust levels of the driving signal in the corresponding source driver chip 5 is 2^N. Specifically, an appropriate value of N needs to be selected according to the hardware computing power and the requirements for the number of thrust states of the OP level during the application process.

[0104] In some embodiments, the control unit 4 further includes a second calculation unit 421 and a second generation unit 422. The second calculation unit 421 is configured to calculate a first difference between the data voltages written to the current row of pixel units by a plurality of data lines 1 corresponding to the pixel units to be charged and the data voltages to be written to the pixel units 10 to be charged in the next row. The second generation unit 422 is configured to generate the second control signal based on the first difference and a preset relationship between the data voltage difference of the pixel units and the data voltage level.

[0105] Specifically, referring to Figure 5 , the pixel units 10 in state 1 and state 2 are in the same row. The range of data voltages required by the pixel units in state 1 is relatively large. Therefore, the two data lines corresponding to state 1 need to use a larger driving voltage level. Specifically, the second control signal can be generated according to the preset relationship between the data voltage difference of the pixel units and the data voltage level to control the voltage level of the driving signal in the source driver chip 5. In addition, similar to encoding according to the comparison result of the first distance and the preset distance and generating the second control signal according to the preset relationship between the encoding and the voltage level, in the embodiments of the present disclosure, the second control signal can also be generated by encoding according to the comparison result of the first difference and the preset difference and according to the preset relationship between the encoding and the voltage level. One data line corresponds to 1 bit of data, N data lines correspond to N bits of data. After N M / M+1 bit encodings, N more bits of data are obtained, and the N bits of data obtained correspond to 2^N kinds of driving levels. The specific encoding method is also similar to the above and will not be repeated here.

[0106] In some embodiments, the source driver chip 5 includes a second control signal line and a plurality of operational amplifiers OP. One operational amplifier OP is connected to one data line 1. The second control signal line is configured to output the second control signal 420 to the plurality of operational amplifiers OP during the charging stage of any row of pixel units 10. The operational amplifier OP is configured to provide a data voltage to the data line 1 connected thereto based on the second control signal 420.

[0107] It should be noted that in the actual application scenario, for a plurality of pixel units in the same row (a plurality of pixel units with the same first distance), the difference between the data voltages written to the pixel units in the current row and the data voltages to be written to the pixel units in the corresponding next row is generally different (the first difference is generally different); similarly, two pixel units with the same first difference do not necessarily have the same first distance. At this time, the first distance and the first difference can be comprehensively considered to generate the second control signal to control the driving level of the driving signal. Of course, according to the actual application scenario, the second control signal can also be determined only based on the first distance or only based on the first difference. The present disclosure does not make any limitations in this regard.

[0108] In some embodiments, during the entire process of charging the pixel units, for different pixel units to be charged, charge sharing may not be performed, and only during the charging stage, the source driver chip is controlled by a second control signal to provide different thrust levels; alternatively, all pixel units may be charged using the same thrust level, and only during the charge sharing stage, the conduction state of the charge sharing circuit is controlled according to the first control signal.

[0109] In some embodiments, the display device may further generate a first control signal during the charge sharing stage to control the conduction state between multiple data lines connected to the charge sharing circuit, and then generate a second control signal during the charging stage to control the thrust level provided by the source driver chip to the data lines.

[0110] In some embodiments, the second control signal provides the same data voltage to multiple data lines 1 connected to the same charge sharing circuit 3. That is, one second control signal 420 is used to simultaneously control multiple operational amplifiers OP corresponding to multiple data lines 1 in one charge sharing circuit 3.

[0111] It should be noted that when the display device drives the display according to the first control signal and the second control signal simultaneously, the first control signal can still be generated by encoding according to the conduction state between N data lines, and the second control signal can be generated by encoding according to the first distance and / or the first difference. In the display device, the gray level of each column of pixel units 10 is represented by Mbit data. Embodiments of the present disclosure can additionally add 1bit data on the basis of Mbit data. After N M / M + 1bit encodings, Nbit more data is obtained. Still, one data line corresponds to 1bit data, and N data lines correspond to Nbit data. At this time, considering factors such as storage memory, the first control signal 410 and the second control signal 420 respectively correspond to N / 2bit data. Specifically, after N M / M + 1bit encodings, N bit more data is obtained. Among them, N / 2bit data is used to generate the first control signal, and the other N / 2bit data is used to generate the second control signal; for the N / 2bit data corresponding to the first control signal, there are 2^(N / 2) conduction states; for the N / 2bit data corresponding to the second control signal, there are 2^(N / 2) thrust levels. N is an even number greater than or equal to 4. In this case, compared with using Nbit data to correspond to the first control signal or the second control signal, although the corresponding conduction states or thrust levels are smaller. However, it is more power-saving than only considering one control signal (the first control signal or the second control signal).

[0112] Based on the same inventive concept, embodiments of the present disclosure further provide a driving method based on a display device, where the display device may be any of the display devices in the above embodiments.

[0113] Figure 6 The flowchart of a driving method based on a display device provided by an embodiment of the present disclosure is as follows. Figure 6 As shown, the driving method includes the following steps:

[0114] 601. During the charging stage of any row of pixel units, the charge sharing circuit independently connects the multiple data lines connected thereto to the source driver chip.

[0115] 602. The control unit generates a first control signal according to the data voltage written to the current row of pixel units by the data line connected to the charge sharing circuit, and the data voltage to be written to the next row of pixel units.

[0116] 603. The charge sharing circuit determines whether to short-circuit the data lines connected thereto according to the first control signal.

[0117] In some embodiments, step 602 specifically includes: calculating the change value of the sum of the data voltage changes of the multiple data lines connected to the charge sharing circuit over time after short-circuiting the data line corresponding to the charge sharing circuit according to the data voltage written to the current row of pixel units by the data line connected to the charge sharing circuit, and the data voltage to be written to the next row of pixel units; and generating a first control signal based on the change value.

[0118] In some embodiments, generating a first control signal based on the change value specifically includes: in response to the change value increasing over time, determining that the states of the multiple data lines connected to the charge sharing circuit are non-conductive; in response to the change value decreasing over time or the change value decreasing first and then increasing over time, determining that the states between the multiple data lines connected to the charge sharing circuit are conductive; and generating a first control signal according to the conductive states of the multiple data lines connected to the charge sharing circuit.

[0119] In some embodiments, the conductive states between the multiple data lines connected to the charge sharing circuit are divided into 2^N conductive states, where N is the number of data lines connected to the charge sharing circuit, and N is a positive integer greater than or equal to 2. Determining that the states between the multiple data lines connected to the charge sharing circuit are conductive specifically includes: in response to the change value decreasing over time or the change value decreasing first and then increasing over time, calculating the decreasing amplitude of the change value; comparing the decreasing amplitude of the change value with a preset amplitude value, and determining the conductive states between the multiple data lines connected to the charge sharing circuit according to the comparison result.

[0120] In some embodiments, determining the conductive states between the multiple data lines connected to the charge sharing circuit according to the comparison result specifically includes: encoding based on the comparison result, and determining the conductive states between the multiple data lines connected to the charge sharing circuit according to the preset encoding-conductive state relationship.

[0121] In some embodiments, the data sharing circuit includes a first control signal line and a MOS transistor electrically connected to a data line. The gate of the MOS transistor is electrically connected to the first control signal line, the source and drain of the MOS transistor are respectively electrically connected to a data line, and the first control signal line outputs a first control signal to the MOS transistor during the charge sharing stage. The MOS transistor is turned on under the control of the first control signal to short-circuit the two connected data lines.

[0122] In some embodiments, under the control of the first control signal, the MOS transistor includes four conduction states, namely 0% conduction, 33% conduction, 66% conduction, and 100% conduction.

[0123] In some embodiments, the driving method not only includes steps 601, 602, and 603, but also includes that the control unit generates the second control signal based on the position of the pixel unit to be charged, and / or based on the data voltage written to the current row of pixel units by the data line where the pixel unit to be charged is located, and the data voltage to be written to the next row of pixel units to be charged. The source driver chip provides the data voltage to the data line connected thereto based on the second control signal.

[0124] In some embodiments, the control unit generates the second control signal based on the position of the pixel unit to be charged, specifically including: calculating a first distance between the pixel unit to be charged and the driving signal in the source driver chip based on the position of the pixel unit to be charged; comparing the first distance with a preset distance, and generating the second control signal according to the comparison result.

[0125] In some embodiments, comparing the first distance with a preset distance and generating the second control signal according to the comparison result specifically includes: comparing the first distance with a preset distance, encoding according to the comparison result, and generating the second control signal according to the preset encoding-voltage level relationship.

[0126] In some embodiments, generating the second control signal based on the data voltage written to the current row of pixel units by the data line corresponding to the pixel unit to be charged and the data voltage to be written to the next row of pixel units to be charged specifically includes: calculating a first difference between the data voltage written to the current row of pixel units by the data line corresponding to the pixel unit to be charged and the data voltage to be written to the next row of pixel units to be charged; generating the second control signal based on the first difference and the preset data voltage difference-data voltage level relationship of the pixel unit.

[0127] In some embodiments, the source driver chip includes a second control signal line and multiple operational amplifiers, and one operational amplifier is connected to one data line. The second control signal line outputs a second control signal to the multiple operational amplifiers during the charging stage of any row of pixel units. The operational amplifier provides the data voltage to the data line connected thereto based on the second control signal.

[0128] Figure 7 This is a flowchart of another driving method based on a display device provided by an embodiment of the present disclosure. As Figure 7 shown, the driving method includes:

[0129] 701. Calculate the change value of the difference Δgray between the data voltages of two rows over time according to the data voltage of the current row pixel unit and the data voltage of the next row pixel unit, and determine the conduction states of multiple data lines in the charge sharing (CS) circuit according to this change value.

[0130] 702. After N M / M + 1 bit encodings, N bit data are obtained more. Among them, the N / 2 bit data obtained more correspond to multiple conduction states of multiple data lines in the charge sharing circuit, and control the generation of a first control signal.

[0131] 703. When Δgray continuously increases over time, the first control signal controls the switch of the charge sharing (CS) circuit to disconnect, so that multiple data lines connected to the charge sharing circuit are not short-circuited; when Δgray first decreases to a small value and then increases greatly, the first control signal controls the switch of the charge sharing (CS) circuit to turn on, so that multiple data lines connected to the charge sharing circuit are short-circuited, and a small charge sharing gear is turned on; when Δgray first decreases and then increases greatly, and the decreasing amplitude is similar to the increasing amplitude, the first control signal controls the switch of the charge sharing (CS) circuit to turn on, so that multiple data lines connected to the charge sharing circuit are short-circuited, and a moderate charge sharing gear is turned on; when Δgray first decreases slightly and then increases slightly, the first control signal controls the switch of the charge sharing (CS) circuit to turn on, so that multiple data lines connected to the charge sharing circuit are short-circuited, and a large charge sharing gear is turned on; when Δgray continuously decreases over time, the first control signal controls the switch of the charge sharing (CS) circuit to turn on, so that multiple data lines connected to the charge sharing circuit are short-circuited, and the charge sharing gear is fully turned on.

[0132] 704. The other N / 2 bit data obtained more correspond to multiple thrust gears. Specifically, according to the change magnitude of the data voltage of the current row pixel unit and the data voltage of the next row pixel unit, the gear of the driving signal is controlled.

[0133] 705. In the same row, pixel units with larger changes use larger driving signal gears (i.e., OP gears); among pixel units in different rows, among pixel units with the same change magnitude, the farther away from the OP end, the larger the OP gear used; among pixel units in different rows with different change magnitudes, it is necessary to comprehensively consider the distance of the pixel unit from the driving signal and the change magnitude to select the corresponding OP gear.

[0134] It should be noted that in the embodiments of the present disclosure, N is an even number greater than or equal to 4. In the display device, the gray level of each column of pixel units 10 is represented by M-bit data. In the embodiments of the present disclosure, 1-bit data can be additionally added on the basis of the M-bit data. After N M / M+1-bit encodings, N-bit data is obtained. Among them, N / 2-bit data corresponds to 2^(N / 2) conduction states of multiple data lines in the charge sharing circuit; the other N / 2-bit data corresponds to 2^(N / 2) thrust levels.

[0135] The driving method proposed in the embodiments of the present disclosure is based on the OP (Operation Amplifier) level control method for data encoding, the CS (Charge Sharing) method for CS level control, and the adaptive control method combining the OP level and the CS level. Among them, the second control signal for controlling the OP level sets different OP output levels according to the different magnitudes of data voltage changes and the positions of pixel units, and the first control signal for controlling the CS level is used to control the conduction degree between different data lines during the CS process. The driving method provided in the embodiments of the present disclosure can be used to reduce the power consumption required by the display device during the display of images.

[0136] Other details of the driving method provided in the embodiments of the present disclosure are similar to those in the embodiments of the display device, and will not be repeated here.

[0137] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A display device, characterized in that, The display device includes a plurality of scan lines and a plurality of data lines, and the plurality of scan lines and the plurality of data lines intersect to define a plurality of pixel units; the pixel units in the same row are connected to the same scan line, and the pixel units in the same column are connected to the same data line; wherein, The display device further includes a control unit, at least one charge sharing circuit, and a source driver chip; each charge sharing circuit is connected to a plurality of data lines, and the data lines connected by different charge sharing circuits are different; In the charging stage of the pixel units in any row, the charge sharing circuit is configured to independently connect the plurality of data lines connected thereto to the source driver chip; The control unit is configured to generate a first control signal according to the data voltage written to the pixel units in the current row by the data lines connected to the charge sharing circuit, and the data voltage to be written to the pixel units in the next row; In the charge sharing stage of the pixel units in any row, the charge sharing circuit is further configured to determine whether to short-circuit the data lines connected thereto according to the first control signal.

2. The display device according to claim 1, wherein The control unit includes a first calculation unit and a first generation unit; The first calculation unit is configured to calculate the change value of the sum of the data voltage changes of the plurality of data lines connected to the charge sharing circuit over time after short-circuiting the data line corresponding to the charge sharing circuit, according to the data voltage written to the pixel units in the current row by the data lines connected to the charge sharing circuit, and the data voltage to be written to the pixel units in the next row; The first generation unit is configured to generate a first control signal based on the change value.

3. The display device according to claim 2, wherein The first generation unit includes a first determination module and a first generation module, The first determination module is configured to determine that the states of the plurality of data lines connected to the charge sharing circuit are non-conductive in response to the change value increasing over time; determine that the states between the plurality of data lines connected to the charge sharing circuit are conductive in response to the change value decreasing over time or the change value decreasing first and then increasing over time; The first generation module is configured to generate the first control signal according to the conduction states of the plurality of data lines connected to the charge sharing circuit.

4. The display device according to claim 3, wherein The conduction states between the plurality of data lines connected to the charge sharing circuit are divided into 2^N conduction states, where N is the number of data lines connected to the charge sharing circuit, and N is a positive integer greater than or equal to 2. The first determination module includes a first calculation sub-unit and a first comparison sub-unit, The first calculation sub-unit is configured to calculate the reduction amplitude of the change value in response to the change value decreasing over time or the change value decreasing first and then increasing over time; The first comparison sub-unit is configured to compare the reduction amplitude of the change value with a preset amplitude value, and determine the conduction states between the plurality of data lines connected to the charge sharing circuit according to the comparison result.

5. The display device according to claim 4, wherein The first comparison unit is specifically configured to perform encoding based on the comparison result, and determine the conduction states among multiple data lines connected to the charge sharing circuit according to a preset encoding-conduction state relationship.

6. The display device according to claim 1, wherein The data sharing circuit includes a first control signal line and MOS transistors electrically connected to the data lines. Among them, the gates of the MOS transistors are electrically connected to the first control signal line, and the sources and drains of the MOS transistors are respectively electrically connected to a data line. The first control signal line is configured to output the first control signal to the MOS transistors during the charge sharing stage. The MOS transistors are configured to be turned on under the control of the first control signal to short-circuit the two connected data lines.

7. The display device according to claim 6, wherein Under the control of the first control signal, the MOS transistors have four conduction states, namely 0% conduction, 33% conduction, 66% conduction, and 100% conduction.

8. The display device according to claim 1, characterized in that, The control unit is further configured to generate a second control signal based on the position of the pixel unit to be charged, and / or based on the data voltage written to the pixel unit in the current row by all the data lines corresponding to the pixel unit to be charged, and the data voltage to be written to the pixel unit to be charged in the next row. The source driver chip is configured to provide a data voltage to the data lines connected thereto based on the second control signal.

9. The display device according to claim 8, wherein The control unit further includes a second calculation unit and a second generation unit. The second calculation unit is configured to calculate a first distance between the pixel unit to be charged and the driving signal in the source driver chip based on the position of the pixel unit to be charged. The second generation unit is configured to compare the first distance with a preset distance and generate the second control signal according to the comparison result.

10. The display device according to claim 9, wherein The second generation unit is specifically configured to compare the first distance with a preset distance, perform encoding according to the comparison result, and generate the second control signal according to a preset encoding-voltage level relationship.

11. The display device according to claim 8, wherein The control unit further includes a second calculation unit and a second generation unit. The second calculation unit is configured to calculate a first difference between the data voltage written to the pixel unit in the current row by the data line corresponding to the pixel unit to be charged and the data voltage to be written to the pixel unit to be charged in the next row. The second generation unit is configured to generate the second control signal based on the first difference and a preset data voltage difference-data voltage level relationship of the pixel unit.

12. The display device according to claim 8, wherein The source driver chip includes a second control signal line and multiple operational amplifiers. One operational amplifier is connected to one data line. The second control signal line is configured to output the second control signal to the multiple operational amplifiers during the charging stage of any row of pixel units. The operational amplifiers are configured to provide a data voltage to the data lines connected thereto based on the second control signal.

13. The display device according to claim 12, wherein the second control signal provides the same data voltage to multiple data lines connected to the same charge sharing circuit.

14. A driving method based on a display device, characterized in that, The display device includes a plurality of scan lines and a plurality of data lines, and the plurality of scan lines and the plurality of data lines intersect to define a plurality of pixel units; the pixel units in the same row are connected to the same scan line, and the pixel units in the same column are connected to the same data line; the display device further includes a control unit, at least one charge sharing circuit, and a source driver chip; Each of the charge sharing circuits is connected to a plurality of data lines, and the data lines connected by different charge sharing circuits are different; the driving method includes: In the charging stage of the pixel units in any row, the charge sharing circuit independently connects the plurality of data lines connected thereto to the source driver chip; The control unit generates a first control signal according to the data voltage written to the pixel units in the current row and the data voltage to be written to the pixel units in the next row based on the data lines connected to the charge sharing circuit; In the charge sharing stage of the pixel units in any row, the charge sharing circuit determines whether to short-circuit the data lines connected thereto according to the first control signal.

Images