Display device and driving method of display device

Abstract

The embodiment of the present application discloses a display device and a driving method thereof. The display device comprises a driving module and a display panel. The driving module is used for generating a data voltage according to an original voltage and an offset voltage; the display panel is connected with the driving module, and the display panel comprises pixel units arranged in an array, and the pixel units are used for receiving the data voltage; at a first preset frequency, offset voltages corresponding to at least one pixel unit are the same in two adjacent refresh periods. The technical scheme provided by the embodiment solves the problem of flicker of a picture when the picture is switched during display of the picture at a low refresh frequency.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, and in particular, to a display device and a driving method of the display device. BACKGROUND

[0002] With the development of display technology, people have higher and higher requirements for display panels. The existing display device has a flickering problem when switching pictures at a low refresh frequency, which affects the display effect of the display device. SUMMARY

[0003] Embodiments of the present application provide a display device and a driving method of the display device to solve or improve the flickering problem of the existing display device when switching pictures at a low refresh frequency.

[0004] To solve the above technical problems, the present application adopts the following technical solutions:

[0005] Embodiments of the present application provide a display device, comprising:

[0006] A driving module for generating a data voltage according to an original voltage and an offset voltage;

[0007] A display panel connected to the driving module, the display panel comprising pixel units arranged in an array, the pixel units being configured to receive the data voltage;

[0008] At a first preset frequency, the offset voltage corresponding to at least one pixel unit is the same in adjacent two refresh periods.

[0009] Optionally, at the first preset frequency, the offset voltages corresponding to the pixel units of adjacent two rows are different in the same refresh period.

[0010] Optionally, at the first preset frequency, the offset voltage corresponding to the pixel units of odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is a second offset voltage in the same refresh period.

[0011] Optionally, the polarities of the first offset voltage and the second offset voltage are opposite.

[0012] Optionally, the absolute values of the first offset voltage and the second offset voltage are equal.

[0013] Optionally, at a second preset frequency greater than the first preset frequency, the offset voltage corresponding to at least one pixel unit is different in adjacent two refresh periods.

[0014] Optionally, at the second preset frequency, the polarities of the offset voltages corresponding to the same pixel unit are opposite in adjacent two refresh periods.

[0015] Optionally, at the second preset frequency, the polarities of the offset voltages corresponding to the pixel units of the same pixel unit in two adjacent refresh periods are opposite, and the absolute values of the offset voltages are equal.

[0016] Optionally, at the second preset frequency, the offset voltages corresponding to the pixel units of two adjacent rows in the same refresh period are different.

[0017] Optionally, at the second preset frequency, in the same refresh period, the offset voltage corresponding to the pixel unit of the odd-numbered row is the first offset voltage, and the offset voltage corresponding to the pixel unit of the even-numbered row is the second offset voltage.

[0018] Optionally, the polarities of the first offset voltage and the second offset voltage are opposite.

[0019] Optionally, the absolute values of the first offset voltage and the second offset voltage are equal.

[0020] Optionally, the sum of the original voltage and the offset voltage is the data voltage.

[0021] Optionally, the original voltage is a gamma voltage, the driving module includes a gamma amplifier and a data driver, a first input end of the gamma amplifier is connected to the gamma voltage, a second input end of the gamma amplifier is connected to the offset voltage, and an output end of the gamma amplifier is electrically connected to the pixel unit through the data driver.

[0022] Optionally, the gamma amplifier is further provided with a switching switch and a peripheral circuit, and the switching switch is used to convert the gamma amplifier and the peripheral circuit back and forth into an addition circuit or a subtraction circuit.

[0023] Optionally, the peripheral circuit can include a resistor.

[0024] Optionally, the driving module further includes a voltage generating module, an output end of the voltage generating module is electrically connected to the second input end of the gamma amplifier, and the voltage generating module is used to output an adjustable offset voltage.

[0025] Optionally, the display device further includes at least one data line extending in the first direction; the driving module is electrically connected to the pixel unit of the display panel through the data line; and the data line is used to transmit the data voltage to the pixel unit.

[0026] The first direction intersects with the row direction.

[0027] Preferably, the display device further includes at least one scan line extending in the second direction; the scan line is electrically connected to the pixel unit of the corresponding row; and the second direction is parallel to the row direction.

[0028] Optionally, at the first preset frequency, a refresh period includes a write frame and at least one holding frame.

[0029] In the writing frame, a data voltage is written to the pixel unit, and in the holding frame, no data voltage is written to the pixel unit.

[0030] According to another aspect of the present application, the embodiment of the present application provides a driving method of a display device, comprising:

[0031] A data voltage is generated according to the original voltage and the offset voltage;

[0032] The data voltage is transmitted to the pixel unit at a first preset frequency, wherein in at least two adjacent refresh periods, the offset voltage corresponding to at least one pixel unit is the same.

[0033] Optionally, in the same refresh period, the offset voltage corresponding to the pixel units of adjacent two rows is different at the first preset frequency.

[0034] Optionally, in the same refresh period, the offset voltage corresponding to the pixel units of odd-numbered rows is the first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is the second offset voltage at the first preset frequency.

[0035] Optionally, the polarities of the first offset voltage and the second offset voltage are opposite.

[0036] Optionally, the absolute values of the first offset voltage and the second offset voltage are equal.

[0037] Optionally, in a second preset frequency greater than the first preset frequency, the offset voltage corresponding to at least one pixel unit is different in adjacent two refresh periods.

[0038] Optionally, in the second preset frequency, the polarities of the offset voltage corresponding to the same pixel unit in adjacent two refresh periods are opposite.

[0039] Optionally, in the second preset frequency, the polarities of the offset voltage corresponding to the same pixel unit in adjacent two refresh periods are opposite, and the absolute values are equal.

[0040] Optionally, in the same refresh period, the offset voltage corresponding to the pixel units of adjacent two rows is different at the second preset frequency.

[0041] Optionally, in the same refresh period, the offset voltage corresponding to the pixel units of odd-numbered rows is the first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is the second offset voltage at the second preset frequency.

[0042] Optionally, the polarities of the first offset voltage and the second offset voltage are opposite.

[0043] Optionally, the absolute values of the first offset voltage and the second offset voltage are equal.

[0044] Optionally, the sum of the original voltage and the offset voltage is a data voltage;

[0045] Optionally, at the first preset frequency, a refresh period includes a write frame and at least one hold frame;

[0046] In the write frame, the data voltage is written to the pixel unit, and in the hold frame, the data voltage is not written to the pixel unit.

[0047] The display device provided by the embodiment of the present application makes the offset voltage corresponding to at least one pixel unit in adjacent two refresh periods of the display panel at the first preset frequency the same, so that the luminous brightness caused by the offset voltage corresponding to at least one pixel unit is the same, and then the luminous brightness caused by the offset voltage in the time dimension remains unchanged when the display panel switches between the current refresh period and the next refresh period included in the adjacent two refresh periods, which better improves the flicker problem of the display panel when displaying a low-frequency picture and improves the display effect of the display device. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0049] Figure 1 is a structural schematic diagram of a display device provided by the embodiment of the present application;

[0050] Figure 2 is a structural schematic diagram of a driving module of a display device provided by the embodiment of the present application;

[0051] Figure 3 is an equivalent structural schematic diagram of a driving module of another display device provided by the embodiment of the present application when the gamma amplifier is switched to an addition circuit;

[0052] Figure 4 is an equivalent structural schematic diagram of a driving module of another display device provided by the embodiment of the present application when the gamma amplifier is switched to a subtraction circuit;

[0053] Figure 5 is a structural schematic diagram of a driving module of another display device provided by the embodiment of the present application;

[0054] Figure 6 is a schematic diagram of offset voltages corresponding to each pixel unit provided by the embodiment of the present application;

[0055] Figure 7is a schematic view of offset voltages corresponding to each pixel unit provided by another embodiment of the present application;

[0056] Figure 8 is a schematic view of offset voltages corresponding to each pixel unit provided by another embodiment of the present application;

[0057] Figure 9 is a schematic view of offset voltages corresponding to each pixel unit provided by another embodiment of the present application;

[0058] Figure 10 is a schematic view of offset voltages corresponding to each pixel unit provided by another embodiment of the present application;

[0059] Figure 11 is a flow chart of a driving method of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0060] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the present application and not in limitation thereof. It should also be noted that, for the purpose of description, only the parts related to the present application are shown in the accompanying drawings rather than all the parts.

[0061] Based on the above technical problem, the present embodiment proposes the following solutions:

[0062] The display device in the related art has the problem of flicker when the picture is switched when displaying the picture at a low refresh frequency, which affects the display effect of the display device.

[0063] Figure 1 is a schematic view of a display device provided by an embodiment of the present application. Figure 2 is a schematic view of a driving module of a display device provided by an embodiment of the present application. Figure 3 is a schematic view of an equivalent structure of a driving module of another display device provided by an embodiment of the present application when the gamma amplifier is switched to an addition circuit. Figure 4 is a schematic view of an equivalent structure of a driving module of another display device provided by an embodiment of the present application when the gamma amplifier is switched to a subtraction circuit. Figures 1 to 4The display device 100 provided by the embodiment of the present application comprises a driving module 1 and a display panel 3. The driving module 1 is used to generate a data voltage Vdata according to an original voltage Vin and an offset voltage Vos. The display panel 3 is connected with the driving module 1, and the display panel 3 comprises pixel units 4 arranged in an array, and the pixel units 4 are used to receive the data voltage Vdata. At a first preset frequency, the offset voltage Vos corresponding to at least one pixel unit 4 is the same in two adjacent refresh periods. For example, at the first preset frequency, the offset voltage corresponding to the same pixel unit is the same in two adjacent refresh periods.

[0064] Specifically, the display device 100 comprises a display panel 3 and a driving module 1 used to drive the display panel 3. The display device 100 has a display area AA used to display an image and a non-display area NA adjacent to the display area AA, wherein the non-display area NA is an area in which the image is not displayed. The driving module 1 is arranged in the non-display area NA. The pixel units 4 are arranged in the display area AA.

[0065] The driving module 1 generates the data voltage Vdata based on the original voltage Vin and the offset voltage Vos.

[0066] The display panel 3 comprises pixel units 4 arranged in an array. Optionally, the display device 100 further comprises at least one data line DL extending along a first direction D1; the driving module 1 is electrically connected with the pixel units 4 of the display panel 3 through the data line DL; and the data line DL is used to transmit the data voltage Vdata to the pixel units 4. Optionally, the first direction D1 intersects with a row direction, for example, is perpendicular to the row direction. The data line DL can be multiple, and the multiple data lines DL can be arranged along the row direction.

[0067] Optionally, the display device 100 further comprises at least one scan line GL extending along a second direction D2; the scan line GL is electrically connected with the pixel units 4 of a corresponding row; and the second direction D2 is parallel to the row direction. The scan line GL can be multiple, and the multiple scan lines GL can be arranged along the first direction D1.

[0068] According to the image data, the current display gray scale of each pixel unit can be determined, and then according to the current display gray scale of each pixel unit and the corresponding relationship between the display gray scale and the data voltage, the original voltage Vin in an analog form can be determined. According to the image data, the current display gray scale of each pixel unit can be determined, and then according to the current display gray scale of each pixel unit and the corresponding relationship between the display gray scale and the gamma register value, the gamma register value can be determined, and then the digital form of the gamma register value is converted into the original voltage Vin in an analog form, for example, a gamma voltage, through a digital-to-analog converter. The corresponding relationship between the display gray scale and the gamma register value can be obtained through gamma debugging in advance.

[0069] At a first preset frequency, the offset voltage Vos corresponding to at least one pixel unit 4 is the same in two adjacent refresh cycles. The first preset frequency can be a low frequency, for example, less than or equal to 10 Hz. When the display panel 3 displays images at a refresh rate lower than 10 Hz, the offset voltage Vos corresponding to at least one pixel unit 4 in two adjacent refresh cycles is set to be the same. This configuration ensures that when the display panel 3 switches between the current refresh cycle and the next refresh cycle included in two adjacent refresh cycles, the offset voltage Vos corresponding to the same pixel unit 4 is the same. Furthermore, when the display panel 3 switches between the current refresh cycle and the next refresh cycle, the brightness corresponding to the offset voltage Vos can be maintained constant over time. This effectively reduces flickering when the display panel 3 displays images at low frequencies and low brightness grayscales, thereby improving the display quality of the display panel 3. At low brightness grayscales and low refresh rates, the flip-flop of the offset voltage Vos has a relatively large impact on the brightness during image switching. At high brightness grayscales and low refresh rates, the flip-flop of the offset voltage Vos has a relatively small impact on the brightness during image switching.

[0070] The display device 100 provided in this embodiment is configured such that, under a first preset frequency, the offset voltage Vos corresponding to at least one pixel unit 4 in two adjacent refresh cycles of the display panel 3 is the same, so that the luminous brightness caused by the offset voltage Vos corresponding to at least one pixel unit 4 is the same. Consequently, when the display panel 3 switches between the current refresh cycle and the next refresh cycle included in the two adjacent refresh cycles, the luminous brightness caused by the offset voltage Vos remains unchanged in the time dimension, thereby effectively improving the flicker problem of the display panel 3 when displaying images at a low frequency, and improving the display effect of the display device 100.

[0071] Optional, Figure 5 This is a structural diagram of a driving module of another display device provided by an embodiment of the present invention. Figures 2 to 5 The original voltage Vin is the gamma voltage Vin. The driving module 1 includes a gamma amplifier 10 and a data driver 2. The first input terminal of the gamma amplifier 10 is connected to the gamma voltage, the second input terminal of the gamma amplifier 10 is connected to the offset voltage Vos, and the output terminal of the gamma amplifier 10 is electrically connected to the pixel unit 4 via the data driver 2.

[0072] Optionally, the gamma amplifier 10 may include an adding circuit or a subtracting circuit, etc. The voltage output by the gamma amplifier is output to the pixel unit after passing through a data driver with a larger driving capability. The display device 100 may further include a driving controller 6.

[0073] Optionally, the driving module 1 further comprises a voltage generating module 5, an output terminal of the voltage generating module 5 is electrically connected with the second input terminal of the gamma amplifier 10, and the voltage generating module 5 is used to output an adjustable offset voltage Vos.

[0074] Optionally, the voltage generating module 5 can comprise a digital-to-analog converter, and can output voltages with different amplitude values. Optionally, the voltage generating module 5 can comprise an inverter and the like. By controlling whether the inverter is enabled or not, the positive and negative polarities of the offset voltage can be changed.

[0075] The adjustable offset voltage Vos output by the voltage generating module 5 comprises a first offset voltage +Vos and a second offset voltage -Vos. Optionally, the polarities of the first offset voltage +Vos and the second offset voltage -Vos are opposite. Optionally, the absolute values of the first offset voltage +Vos and the second offset voltage -Vos are equal.

[0076] Optionally, on the basis of the above-mentioned embodiments, continuing to refer to Figure 2 , the gamma amplifier 10 is further provided with a switching switch and a peripheral circuit, the switching switch is used to switch the gamma amplifier 10 and the peripheral circuit back and forth to be an addition circuit or a subtraction circuit. Optionally, the peripheral circuit can comprise a resistor.

[0077] Specifically, continuing to refer to Figure 2 , the switching switch comprises a first switch 1, a second switch 2, a third switch 3 and a fourth switch 4. The inverting input terminal of the gamma amplifier 10 is grounded through the first switch 1 and a first resistor R1, and is connected with the second input terminal receiving the offset voltage Vos through the second switch 2 and a second resistor R2. The non-inverting input terminal of the gamma amplifier 10 is connected with the second resistor R2 through the third switch 3. The non-inverting input terminal of the gamma amplifier 10 is connected with a first input terminal receiving an original voltage Vin (for example, a gamma voltage) through a third resistor R3. The non-inverting input terminal of the gamma amplifier 10 is grounded through a fourth switch 4 and a fourth resistor R4. The inverting input terminal of the gamma amplifier 10 is electrically connected with the output terminal of the gamma amplifier 10 through a fifth resistor R5.

[0078] Combining Figure 2 and Figure 3 , when the first switch 1 and the third switch 3 are turned on, and the second switch 2 and the fourth switch 4 are turned off, the gamma amplifier 10 is switched to be the addition circuit, and the voltage Vout output by the gamma amplifier 10 is Vin+Vos.

[0079] Continuing to combine Figure 2 and Figure 4 , when the first switch 1 and the third switch 3 are turned off, and the second switch 2 and the fourth switch 4 are turned on, referring to Figure 4 , the gamma amplifier 10 is switched to be the subtraction circuit, and the voltage Vout output by the gamma amplifier 10 is Vin-Vos.

[0080] It should be noted that, Figures 2 to 4 The first resistance R1 to the fifth resistance R5 included in the peripheral circuit are all equal in value, which is not limited herein.

[0081] Optionally, Figure 6 is a schematic diagram of the offset voltage corresponding to each pixel unit provided by the embodiment of the present application. On the basis of the above embodiment, in combination with Figures 2 to 6 , the sum of the original voltage Vin and the offset voltage Vos is the data voltage Vdata. Optionally, the difference between the gamma voltage and the offset voltage Vos is the data voltage Vdata.

[0082] Optionally, on the basis of the above embodiment, continue to combine Figure 5 and Figure 6 , at the first preset frequency, in the same refresh cycle, the offset voltage Vos corresponding to the pixel units 4 of the adjacent two rows is different.

[0083] Specifically, the offset voltage Vos corresponding to the pixel units 4 of the adjacent two rows in the same refresh cycle at the first preset frequency can be set to be different. For example, the offset voltage Vos corresponding to the pixel units 4 of the previous row is the first offset voltage +Vos, that is, gear A1, the offset voltage Vos corresponding to the pixel units 4 of the current row is the second offset voltage -Vos, that is, gear B1. The offset voltage Vos corresponding to the pixel units 4 of the next row is the first offset voltage +Vos, that is, gear A1, and so on. The first offset voltage can be a positive voltage or a negative voltage. The second offset voltage can be a positive voltage or a negative voltage.

[0084] It should be noted that, Figure 6 The first row L1 to the eighth row L8 of the display device 100 when performing picture display at 10Hz is exemplarily shown, the CHOP is the gear of the offset voltage, which includes the gear A1 (for example, corresponding to one of the first offset voltage +Vos and the second offset voltage -Vos) and the gear B1 (for example, corresponding to the other of the first offset voltage +Vos and the second offset voltage -Vos). S1 is the first column of pixel units, S2 is the second column of pixel units, and so on, and S8 is the eighth column of pixel units. R is a pixel unit for emitting red light. G is a pixel unit for emitting green light. B is a pixel unit for emitting blue light.

[0085] Optionally, on the basis of the above embodiment, continue to refer to Figure 6 , at the first preset frequency, in the same refresh cycle, the offset voltage Vos corresponding to the pixel units 4 of the odd rows is the first offset voltage +Vos, and the offset voltage Vos corresponding to the pixel units 4 of the even rows is the second offset voltage -Vos.

[0086] In this way, the offset voltage Vos corresponding to the pixel units 4 of the odd and even rows can be alternately set as high level H and low level L, so that the average value of the offset voltage Vos is close to the target offset voltage, and the display uniformity of the display device is further improved.

[0087] Optionally, based on the above embodiment, continue to refer to Figure 6 At the first preset frequency, in the current refresh period, the pixel units 4 of the odd rows correspond to the first offset voltage +Vos, i.e., gear A1, and in the next refresh period, the pixel units 4 of the odd rows correspond to the first offset voltage +Vos, i.e., gear A1.

[0088] In this way, when switching between the current refresh period and the next refresh period, the pixel units 4 of the odd rows have the same first offset voltage +Vos, i.e., both are gear A1, so that the brightness of the pixel units 4 of the odd rows remains consistent, thereby better reducing the flicker problem between the odd rows when switching between the current refresh period and the next refresh period.

[0089] Figure 7 is another schematic diagram of the offset voltage corresponding to each pixel unit provided by the embodiment of the present application. Refer to Figure 7 At the first preset frequency, in the current refresh period, the pixel units 4 of the odd rows correspond to the second offset voltage -Vos, i.e., gear B1, and in the next refresh period, the pixel units 4 of the odd rows correspond to the second offset voltage -Vos, i.e., gear B1. In this way, when switching between the current refresh period and the next refresh period, the pixel units 4 of the odd rows have the same second offset voltage -Vos, i.e., both are gear B1, so that the brightness of the pixel units 4 of the odd rows remains consistent, thereby better improving the flicker problem between the odd rows when switching between the current refresh period and the next refresh period.

[0090] In another optional embodiment, continue to refer to Figure 7 In the current refresh period, the pixel units 4 of the even rows correspond to the first offset voltage +Vos, i.e., gear A1, and in the next refresh period, the pixel units 4 of the even rows correspond to the first offset voltage +Vos, i.e., gear A1. In this way, when switching between the current refresh period and the next refresh period, the pixel units 4 of the even rows have the same first offset voltage +Vos, so that the brightness of the pixel units 4 of the even rows remains consistent, thereby better improving the flicker problem between the even rows when switching between the current refresh period and the next refresh period.

[0091] In another optional embodiment, continue to refer to Figure 6In the current refresh cycle, the pixel units 4 of the even rows correspond to the second offset voltage -Vos, i.e., gear B1, and in the next refresh cycle, the pixel units 4 of the even rows correspond to the second offset voltage -Vos, i.e., gear B1. Such a setting makes the pixel units 4 of the even rows have the same second offset voltage -Vos when switching between the current refresh cycle and the next refresh cycle, and further makes the brightness of the pixel units 4 of the even rows consistent, thereby better improving the flicker problem between the even rows when switching between the current refresh cycle and the next refresh cycle.

[0092] Optionally, Figure 8 is another schematic diagram of offset voltages corresponding to respective pixel units provided by an embodiment of the present application. Based on the above embodiment, referring to Figure 8 At the first preset frequency, in the same refresh cycle, the offset voltages Vos corresponding to the pixel units 4 of adjacent two rows are the same.

[0093] Specifically, at the first preset frequency, the offset voltages Vos corresponding to the pixel units 4 of adjacent two rows in the same refresh cycle can be set to be the same, and the offset voltages Vos corresponding to the pixel units 4 of all rows are the same when switching between the current refresh cycle and the next refresh cycle, so that the offset voltages Vos corresponding to the respective pixel units 4 are the same when switching between the current refresh cycle and the next refresh cycle, which can better improve the flicker problem of the display panel 3 when switching between the current refresh cycle and the next refresh cycle, and further improve the display effect of the display panel 3.

[0094] Optionally, based on the above embodiment, referring to Figure 8 At the first preset frequency, in the same refresh cycle, the offset voltages Vos corresponding to the pixel units 4 of adjacent two rows are the first offset voltage +Vos, i.e., gear A1. Alternatively, Figure 9 is another schematic diagram of offset voltages corresponding to respective pixel units provided by an embodiment of the present application. Based on the above embodiment, referring to Figure 9 At the first preset frequency, in the same refresh cycle, the offset voltages Vos corresponding to the pixel units 4 of adjacent two rows are the second offset voltage -Vos, i.e., gear B1.

[0095] Specifically, in this way, when the display panel 3 displays a picture at a preset frequency range with a low frequency, the offset voltage Vos corresponding to each pixel unit 4 in the same refresh period can be set as the first offset voltage +Vos. Since the offset voltage Vos corresponding to the same pixel unit 4 is the same in adjacent two refresh periods at the first preset frequency, the offset voltage Vos corresponding to each pixel unit 4 in adjacent two refresh periods is the first offset voltage +Vos. In this way, when switching between the current refresh period and the next refresh period, the offset voltage Vos corresponding to each pixel unit is the first offset voltage +Vos, which can better improve the flicker problem of the display panel 3 when switching between the current refresh period and the next refresh period, and further improve the display effect of the display panel 3.

[0096] In another alternative embodiment, still referring to Figure 9 In this way, when the display panel 3 displays a picture at a preset frequency range with a low frequency, the offset voltage Vos corresponding to each pixel unit 4 in the same refresh period can be set as the first offset voltage +Vos. Since the offset voltage Vos corresponding to the same pixel unit 4 is the same in adjacent two refresh periods at the first preset frequency, the offset voltage Vos corresponding to each pixel unit 4 in adjacent two refresh periods is the first offset voltage +Vos. In this way, when switching between the current refresh period and the next refresh period, the offset voltage Vos corresponding to each pixel unit is the first offset voltage +Vos, which can better improve the flicker problem of the display panel 3 when switching between the current refresh period and the next refresh period, and further improve the display effect of the display panel 3.

[0097] Optionally, Figure 10 is another schematic diagram of the offset voltage corresponding to each pixel unit provided by an embodiment of the present application. Based on the above embodiments, referring to Figure 10 At a second preset frequency greater than the first preset frequency, the offset voltage corresponding to at least one pixel unit is different in adjacent two refresh periods to improve the high-frequency display effect and to improve the display defects such as the brightness difference between rows and frames caused by the difference in the size of the fluctuation or deviation of the expected voltage value of the output voltage of different data lines corresponding to different data voltages (when no offset voltage is set for compensation) and the fluctuation or deviation of the expected voltage value of the output voltage of different channels.

[0098] The second preset frequency can be greater than 10 Hz. The second preset frequency can be 30 Hz, 60 Hz, 90 Hz, or 120 Hz, etc. Optionally, based on the above embodiments, at the second preset frequency, the polarity of the offset voltage corresponding to the same pixel unit is opposite in adjacent two refresh periods.

[0099] Optionally, on the basis of each of the above embodiments, at the second preset frequency, the polarities of the offset voltages corresponding to the pixel units in two adjacent refresh periods are opposite, and the absolute values of the offset voltages are equal.

[0100] Optionally, on the basis of each of the above embodiments, continuing to refer to Figure 10 at the second preset frequency, the offset voltages corresponding to the pixel units in two adjacent refresh periods are opposite, and the absolute values of the offset voltages are equal.

[0101] Specifically, such a setting can better improve the vertical stripe and other undesirable phenomena when the display panel displays a picture at the second preset frequency.

[0102] Optionally, on the basis of each of the above embodiments, at the second preset frequency, in the same refresh period, the offset voltage corresponding to the pixel unit in the odd row is the first offset voltage, and the offset voltage corresponding to the pixel unit in the even row is the second offset voltage.

[0103] Specifically, such a setting can make the offset voltages corresponding to the odd row and the even row different, and further improve the display effect of the display panel when displaying a picture at the second preset frequency.

[0104] Optionally, on the basis of each of the above embodiments, the polarities of the first offset voltage and the second offset voltage are opposite.

[0105] Optionally, on the basis of each of the above embodiments, the absolute values of the first offset voltage and the second offset voltage are equal.

[0106] Optionally, at the first preset frequency, a refresh period includes a write frame and at least one holding frame; in the write frame, a data voltage is written to the pixel unit, and in the holding frame, no data voltage is written to the pixel unit.

[0107] Specifically, such a setting can make the data voltage transmitted to the pixel unit in the write frame, so that the display panel refreshes the display picture. In the holding frame, no data voltage is transmitted to the pixel unit, so that the display panel can maintain the display picture of the display panel to realize low-frequency display.

[0108] Figure 11 is a flowchart of a driving method of a display device provided by an embodiment of the present application. The driving method of the display device can be used to drive the display device in the above embodiments. On the basis of the above embodiments, in combination with Figure 1 and Figure 11 the present embodiment provides a driving method of a display device, comprising:

[0109] S101, generating a data voltage Vdata according to an original voltage Vin and an offset voltage Vos;

[0110] S102, transmit the data voltage Vdata to the pixel unit 4 at a first preset frequency, wherein, in at least one pixel unit 4 corresponding offset voltage Vos is same in adjacent two refresh cycle.

[0111] The driving method of the display device provided by the embodiment comprises: generating a data voltage Vdata according to an original voltage Vin and an offset voltage Vos; transmitting the data voltage Vdata to the pixel unit 4 at a first preset frequency to drive the display device; wherein, in at least one pixel unit 4 corresponding offset voltage Vos is same in adjacent two refresh cycle. By setting the display panel 3 at the first preset frequency, the offset voltage Vos corresponding to the same pixel unit 4 is same in adjacent two refresh cycle, so that the luminance corresponding to the offset voltage Vos can be kept unchanged in time dimension when the display panel 3 switches between the current refresh cycle and the next refresh cycle included in adjacent two refresh cycle, which better reduces the flicker problem of the display panel 3 when displaying a low-frequency picture, and improves the display effect of the display device 100.

[0112] Optionally, on the basis of each of the above embodiments, the offset voltages corresponding to the pixel units of adjacent two rows are different in the same refresh cycle at the first preset frequency.

[0113] Optionally, on the basis of each of the above embodiments, the offset voltage corresponding to the pixel unit of the odd-numbered row is a first offset voltage, and the offset voltage corresponding to the pixel unit of the even-numbered row is a second offset voltage in the same refresh cycle at the first preset frequency.

[0114] Optionally, on the basis of each of the above embodiments, the polarities of the first offset voltage and the second offset voltage are opposite.

[0115] Optionally, on the basis of each of the above embodiments, the absolute values of the first offset voltage and the second offset voltage are equal.

[0116] Optionally, on the basis of each of the above embodiments, the offset voltages corresponding to the pixel units of adjacent two rows are equal, for example, both are positive offset voltages or negative offset voltages, in the same refresh cycle at the first preset frequency.

[0117] Optionally, on the basis of each of the above embodiments, the offset voltages corresponding to at least one pixel unit are different in adjacent two refresh cycles at a second preset frequency greater than the first preset frequency, for example, the offset voltages corresponding to the same pixel unit are different in adjacent two refresh cycles.

[0118] Optionally, on the basis of each of the above embodiments, the polarities of the offset voltages corresponding to the same pixel unit are opposite in adjacent two refresh cycles at the second preset frequency.

[0119] Optionally, on the basis of each of the above embodiments, at the second preset frequency, the polarities of the offset voltages corresponding to the pixel units of two adjacent rows in a same refresh period are opposite.

[0120] Optionally, on the basis of each of the above embodiments, at the second preset frequency, the offset voltages corresponding to the pixel units of two adjacent rows in a same refresh period are different.

[0121] Optionally, on the basis of each of the above embodiments, at the second preset frequency, the offset voltages corresponding to the pixel units of odd-numbered rows in a same refresh period are first offset voltages, and the offset voltages corresponding to the pixel units of even-numbered rows in the same refresh period are second offset voltages.

[0122] Optionally, on the basis of each of the above embodiments, the polarities of the first offset voltages and the second offset voltages are opposite.

[0123] Optionally, on the basis of each of the above embodiments, the absolute values of the first offset voltages and the second offset voltages are equal.

[0124] Optionally, on the basis of each of the above embodiments, the sum of the original voltage and the offset voltage is the data voltage.

[0125] Optionally, on the basis of each of the above embodiments, at the first preset frequency, a refresh period includes a write frame and at least one holding frame.

[0126] Optionally, on the basis of each of the above embodiments, in the write frame, the data voltage is written to the pixel units, and in the holding frame, the data voltage is not written to the pixel units.

[0127] It should be noted that the above only describes the preferred embodiments of the present application and the technical principles applied. It is understood by those skilled in the art that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A display device, characterized by comprising: The display device comprises: a driving module configured to generate a data voltage according to an original voltage and an offset voltage; a display panel connected to the driving module, the display panel comprising pixel units arranged in an array, the pixel units configured to receive the data voltage; at a first preset frequency, the offset voltage corresponding to at least one pixel unit is the same in adjacent two refresh periods; at a second preset frequency greater than the first preset frequency, the offset voltage corresponding to at least one pixel unit is different in adjacent two refresh periods.

2. The display device of claim 1, wherein at the first preset frequency, the offset voltage corresponding to the pixel units of adjacent two rows is different in a same refresh period.

3. The display device according to claim 2, wherein at the first preset frequency, in a same refresh period, the offset voltage corresponding to the pixel units of odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is a second offset voltage.

4. The display device according to claim 3, wherein The first offset voltage and the second offset voltage are opposite in polarity.

5. The display device according to claim 4, wherein The first offset voltage and the second offset voltage are equal in absolute value.

6. The display device of claim 1, wherein at the second preset frequency, the offset voltage corresponding to a same pixel unit is opposite in polarity in adjacent two refresh periods.

7. The display device according to claim 6, wherein at the second preset frequency, the offset voltage corresponding to a same pixel unit is opposite in polarity and equal in absolute value in adjacent two refresh periods.

8. The display device according to claim 1, wherein at the second preset frequency, the offset voltage corresponding to the pixel units of adjacent two rows is different in a same refresh period.

9. The display device according to claim 8, wherein at the second preset frequency, in a same refresh period, the offset voltage corresponding to the pixel units of odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is a second offset voltage.

10. The display device according to claim 9, wherein The first offset voltage and the second offset voltage are opposite in polarity.

11. The display device according to claim 10, wherein The first offset voltage and the second offset voltage are equal in absolute value.

12. The display device according to claim 1, wherein The sum of the original voltage and the offset voltage is the data voltage.

13. The display device of claim 1, wherein The original voltage is a gamma voltage, the driving module comprises a gamma amplifier and a data driver, a first input end of the gamma amplifier is connected to the gamma voltage, a second input end of the gamma amplifier is connected to the offset voltage, and an output end of the gamma amplifier is electrically connected to the pixel units via the data driver.

14. The display device of claim 13, wherein, The gamma amplifier is further provided with a switching switch and a peripheral circuit, the switching switch is configured to convert the gamma amplifier and the peripheral circuit back and forth into an addition circuit or a subtraction circuit.

15. The display device of claim 14, wherein, The peripheral circuit can comprise a resistor.

16. The display device of claim 13, wherein, The driving module further comprises a voltage generating module, an output end of the voltage generating module is electrically connected to the second input end of the gamma amplifier, and the voltage generating module is configured to output an adjustable offset voltage.

17. The display device according to any one of claims 1 to 16, characterized in that: The display device further comprises at least one data line extending in a first direction, the driving module is electrically connected to the pixel units of the display panel via the data line, and the data line is configured to transmit the data voltage to the pixel units. The first direction and the row direction intersect.

18. The display device of claim 17, wherein, The display device further comprises at least one scan line extending in a second direction; the scan line is electrically connected with the pixel units of a corresponding row; the second direction is parallel to the row direction.

19. The display device of claim 1, wherein In a first preset frequency, one refresh period comprises a write frame and at least one holding frame; In the write frame, a data voltage is written to the pixel units, and in the holding frame, no data voltage is written to the pixel units.

20. A driving method of a display device, comprising: Comprise: According to the original voltage and the offset voltage, a data voltage is generated; In a first preset frequency, a data voltage is transmitted to the pixel units, wherein in adjacent two refresh periods, the offset voltage corresponding to at least one pixel unit is the same; In a second preset frequency greater than the first preset frequency, in adjacent two refresh periods, the offset voltage corresponding to at least one pixel unit is different.

21. The driving method of the display device according to claim 20, wherein, In a first preset frequency, in the same refresh period, the offset voltage corresponding to the pixel units of adjacent two rows is different.

22. The driving method of the display device according to claim 21, wherein In a first preset frequency, in the same refresh period, the offset voltage corresponding to the pixel units of odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is a second offset voltage.

23. The driving method of the display device according to claim 22, wherein The polarities of the first offset voltage and the second offset voltage are opposite.

24. The driving method of the display device according to claim 23, wherein The absolute values of the first offset voltage and the second offset voltage are equal.

25. The driving method of the display device according to claim 20, wherein, In a second preset frequency, in adjacent two refresh periods, the polarities of the offset voltage corresponding to the same pixel unit are opposite.

26. The driving method of the display device according to claim 25, wherein In a second preset frequency, in adjacent two refresh periods, the polarities of the offset voltage corresponding to the same pixel unit are opposite, and the absolute values are equal.

27. The method for driving a display device according to claim 20, wherein In a second preset frequency, in the same refresh period, the offset voltage corresponding to the pixel units of adjacent two rows is different.

28. The driving method of the display device according to claim 27, wherein In a second preset frequency, in the same refresh period, the offset voltage corresponding to the pixel units of odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units of even-numbered rows is a second offset voltage.

29. The driving method of the display device according to claim 28, wherein The polarities of the first offset voltage and the second offset voltage are opposite.

30. The driving method of the display device according to claim 29, wherein The absolute values of the first offset voltage and the second offset voltage are equal.

31. The method of driving a display device according to claim 20, wherein The sum of the original voltage and the offset voltage is the data voltage.

32. The method of driving a display device according to claim 20, wherein In a first preset frequency, one refresh period comprises a write frame and at least one holding frame; In the write frame, a data voltage is written to the pixel units, and in the holding frame, no data voltage is written to the pixel units.

Images