CN117153082A - Display device and driving method thereof - Google Patents
Display device and driving method thereof Download PDFInfo
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- CN117153082A CN117153082A CN202311084618.6A CN202311084618A CN117153082A CN 117153082 A CN117153082 A CN 117153082A CN 202311084618 A CN202311084618 A CN 202311084618A CN 117153082 A CN117153082 A CN 117153082A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 12
- 230000002411 adverse Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Abstract
The embodiment of the invention discloses a display device and a driving method of the display device. The display device includes a driving module and a display panel. The driving module is used for generating a data voltage according to the original voltage and the offset voltage; the display panel is connected with the driving module and comprises pixel units which are arranged in an array manner, and the pixel units are used for receiving data voltages; at a first preset frequency, in two adjacent refresh periods, the offset voltages corresponding to at least one pixel unit are the same. The technical scheme provided by the embodiment solves the problem that when the display device displays the picture at a low refresh frequency, the picture flickers when being switched.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a driving method of the display device.
Background
With the development of display technology, the requirements of people on the display panel are increasing. When the conventional display device displays a picture at a low refresh frequency, the picture has a flicker problem during switching, and the display effect of the display device is affected.
Disclosure of Invention
The embodiment of the invention provides a display device and a driving method of the display device, which are used for solving or improving the problem that the existing display device has flicker when displaying pictures at low refresh frequency and switching the pictures.
In order to solve the technical problems, the invention adopts the following technical scheme:
an embodiment of the present invention provides a display device including:
the driving module is used for generating a data voltage according to the original voltage and the offset voltage;
the display panel is connected with the driving module and comprises pixel units which are arranged in an array manner and used for receiving data voltages;
at a first preset frequency, in two adjacent refresh periods, the offset voltages corresponding to at least one pixel unit are the same.
Optionally, under a first preset frequency, in the same refresh period, offset voltages corresponding to the pixel units of two adjacent rows are different;
optionally, under a first preset frequency, in the same refresh period, the offset voltages corresponding to the pixel units of the odd rows are first offset voltages, and the offset voltages corresponding to the pixel units of the even rows are second offset voltages;
optionally, the polarities of the first offset voltage and the second offset voltage are opposite;
optionally, the absolute values of the first offset voltage and the second offset voltage are equal in magnitude.
Optionally, at a second preset frequency greater than the first preset frequency, at least one pixel unit has different offset voltages corresponding to two adjacent refresh periods;
optionally, at the second preset frequency, in two adjacent refresh periods, the polarities of offset voltages corresponding to the same pixel unit are opposite;
optionally, in the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite, and the absolute values are equal;
optionally, under a second preset frequency, in the same refresh period, offset voltages corresponding to the pixel units of two adjacent rows are different;
optionally, under a second preset frequency, in the same refresh period, the offset voltages corresponding to the pixel units in the odd rows are first offset voltages, and the offset voltages corresponding to the pixel units in the even rows are second offset voltages;
optionally, the polarities of the first offset voltage and the second offset voltage are opposite;
optionally, the absolute values of the first offset voltage and the second offset voltage are equal in magnitude.
Optionally, the sum of the original voltage and the offset voltage is the data voltage.
Optionally, the original voltage is gamma voltage, the driving module comprises a gamma amplifier and a data driver, a first input end of the gamma amplifier is connected with the gamma voltage, a second input end of the gamma amplifier is connected with the offset voltage, and an output end of the gamma amplifier is electrically connected with the pixel unit through the data driver;
optionally, the gamma amplifier is further provided with a switch and a peripheral circuit, and the switch is used for converting the gamma amplifier and the peripheral circuit back and forth into an addition circuit or a subtraction circuit;
optionally, the peripheral circuit may include a resistor;
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 configured to output an adjustable offset voltage.
Optionally, the display device further includes: at least one data line extending in a first direction; the driving module is electrically connected with the pixel units of the display panel through the data lines; the data line is used for transmitting data voltage to the pixel unit;
the first direction intersects the row direction;
preferably, the display device further includes: at least one scan line extending in a second direction; the scanning lines are electrically connected with the pixel units of the corresponding rows; the second direction is parallel to the row direction.
Optionally, at a first preset frequency, a refresh period includes a write frame and at least one hold frame;
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.
According to another aspect of the present invention, an embodiment of the present invention provides a driving method of a display device, including:
generating a data voltage according to the original voltage and the offset voltage;
and transmitting data voltage to the pixel units at a first preset frequency, wherein the offset voltage corresponding to at least one pixel unit is the same in two adjacent refresh cycles.
Optionally, under a first preset frequency, in the same refresh period, offset voltages corresponding to the pixel units of two adjacent rows are different;
optionally, under a first preset frequency, in the same refresh period, the offset voltages corresponding to the pixel units of the odd rows are first offset voltages, and the offset voltages corresponding to the pixel units of the even rows are second offset voltages;
optionally, the polarities of the first offset voltage and the second offset voltage are opposite;
optionally, the absolute values of the first offset voltage and the second offset voltage are equal in magnitude.
Optionally, at a second preset frequency greater than the first preset frequency, at least one pixel unit has a different offset voltage in two adjacent refresh cycles.
Optionally, at the second preset frequency, in two adjacent refresh periods, the polarities of offset voltages corresponding to the same pixel unit are opposite;
optionally, in the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite, and the absolute values are equal;
optionally, under a second preset frequency, in the same refresh period, offset voltages corresponding to the pixel units of two adjacent rows are different;
optionally, under a second preset frequency, in the same refresh period, the offset voltages corresponding to the pixel units in the odd rows are first offset voltages, and the offset voltages corresponding to the pixel units in the even rows are second offset voltages;
optionally, the polarities of the first offset voltage and the second offset voltage are opposite;
optionally, the absolute values of the first offset voltage and the second offset voltage are equal;
optionally, the sum of the original voltage and the offset voltage is the data voltage;
optionally, at a first preset frequency, a refresh period includes a write frame and at least one hold frame;
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.
According to the display device provided by the embodiment of the invention, the offset voltage corresponding to at least one pixel unit is the same through the arrangement of the adjacent two refresh cycles of the display panel at the first preset frequency, so that the luminous brightness caused by the offset voltage corresponding to at least one pixel unit is the same, and further, when the display panel is switched between the current refresh cycle and the next refresh cycle included in the adjacent two refresh cycles, the luminous brightness caused by the offset voltage is kept unchanged in the time dimension, the flickering problem of the display panel in the process of displaying pictures at low frequency is better improved, and the display effect of the display device is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving module of a display device according to an embodiment of the present invention;
fig. 3 is an equivalent structural schematic diagram of a driving module of another display device according to an embodiment of the present invention when a gamma amplifier is switched to an adder circuit;
fig. 4 is a schematic diagram of an equivalent structure of a driving module of a display device according to another embodiment of the present invention when a gamma amplifier is switched to a subtracting circuit;
fig. 5 is a schematic structural diagram of a driving module of another display device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of offset voltages corresponding to each pixel unit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram showing offset voltages corresponding to pixel units according to another embodiment of the present invention;
FIG. 8 is a schematic diagram of offset voltages corresponding to pixel units according to another embodiment of the present invention;
FIG. 9 is a schematic diagram of offset voltages corresponding to pixel units according to another embodiment of the present invention;
FIG. 10 is a schematic diagram of offset voltages corresponding to pixel units according to another embodiment of the present invention;
fig. 11 is a flowchart of a driving method of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Based on the above technical problems, the present embodiment proposes the following solutions:
when the display device in the related art displays a picture at a low refresh frequency, the picture has a flicker problem when switching, and the display effect of the display device is affected.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a driving module of a display device according to an embodiment of the present invention. Fig. 3 is an equivalent structure schematic diagram of a driving module of another display device according to an embodiment of the invention when a gamma amplifier is switched to an adder circuit. Fig. 4 is an equivalent structural diagram of a driving module of a display device according to another embodiment of the present invention when a gamma amplifier is switched to a subtracting circuit. Referring to fig. 1 to 4, a display device 100 according to an embodiment of the present invention includes a driving module 1 and a display panel 3. The driving module 1 is configured to generate a data voltage Vdata according to an original voltage Vin and an offset voltage Vos. The display panel 3 is connected to the driving module 1, and the display panel 3 includes pixel units 4 arranged in an array, where the pixel units 4 are configured to receive the data voltage Vdata. At the first preset frequency, in two adjacent refresh periods, the offset voltages Vos corresponding to at least one pixel unit 4 are the same. For example, at a first preset frequency, in two adjacent refresh periods, the offset voltages corresponding to the same pixel unit are the same.
Specifically, the display device 100 includes a display panel 3 and a driving module 1 that drives the display panel 3. The display device 100 has a display area AA displaying 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 disposed in the non-display area NA. The pixel unit 4 is disposed in the display area AA.
The driving module 1 generates a data voltage Vdata based on the original voltage Vin and the offset voltage Vos.
The display panel 3 includes pixel units 4 arranged in an array. Optionally, the display device 100 further includes: at least one data line DL extending in a first direction D1; the driving module 1 is electrically connected with the pixel unit 4 of the display panel 3 through the data line DL; the data line DL is used to transmit the data voltage Vdata to the pixel unit 4. Alternatively, the first direction D1 and the row direction intersect, e.g. perpendicular. The data lines DL may be plural, and the plural data lines DL may be arranged in the row direction.
Optionally, the display device 100 further includes: at least one scanning line GL extending along a second direction D2; the scanning lines GL are electrically connected to the pixel units 4 of the corresponding row; the second direction D2 is parallel to the row direction. The scan lines GL may be plural, and the plural scan lines GL may be arranged along the first direction D1.
The current display gray scale of each pixel unit can be determined according to the image data, and then the original voltage Vin in an analog form is determined according to the current display gray scale of each pixel unit and the corresponding relation between the display gray scale and the data voltage. The current display gray scale of each pixel unit can be determined according to the image data, and then the gamma register value is determined according to the current display gray scale of each pixel unit and the corresponding relation between the display gray scale and the gamma register value, and then the gamma register value in a digital form is converted into an original voltage Vin in an analog form, such as a gamma voltage, through a digital-to-analog converter. The corresponding relation between the display gray scale and the gamma register value can be obtained in advance through gamma debugging and the like.
At a first preset frequency, at least one pixel unit 4 has the same offset voltage Vos in two adjacent refresh cycles. The first preset frequency may be a low frequency, such as a frequency less than or equal to 10Hz. When the display panel 3 displays a picture at a refresh frequency lower than 10Hz, the offset voltages Vos corresponding to at least one pixel unit 4 of two adjacent refresh periods are set to be the same. By the arrangement, when the display panel 3 is switched between the current refresh period and the next refresh period included in the two adjacent refresh periods, the offset voltage Vos corresponding to the same pixel unit 4 is the same, so that when the display panel 3 is switched between the current refresh period and the next refresh period, the brightness corresponding to the offset voltage Vos can be kept unchanged in the time dimension, the flicker problem of the display panel 3 in the low-frequency low-brightness gray-scale display picture is well reduced, and the display effect of the display panel 3 is improved. At low bright gray levels, at low refresh rates, the inversion of the offset voltage Vos has a relatively large effect on the brightness at the time of picture switching. When the gray scale is highlighted, the influence of the flip change of the offset voltage Vos on the brightness during the picture switching is relatively small under the low refresh rate.
According to the display device 100 provided by the embodiment, through setting the adjacent two refresh periods of the display panel 3 at the first preset frequency, the offset voltage Vos corresponding to the at least one pixel unit 4 is the same, so that the light-emitting brightness caused by the offset voltage Vos corresponding to the at least one pixel unit 4 is the same, and further, when the display panel 3 switches between the current refresh period and the next refresh period included in the adjacent two refresh periods, the light-emitting brightness caused by the offset voltage Vos in the time dimension is kept unchanged, the flicker problem of the display panel 3 in the process of displaying images at low frequency is better improved, and the display effect of the display device 100 is improved.
Optionally, fig. 5 is a schematic structural diagram of a driving module of another display device according to an embodiment of the present invention. On the basis of the above embodiment, with continued reference to fig. 2 to 5, the original voltage Vin is a gamma voltage Vin, the driving module 1 includes a gamma amplifier 10 and a data driver 2, a first input terminal of the gamma amplifier 10 is connected to the gamma voltage, a second input terminal of the gamma amplifier 10 is connected to an offset voltage Vos, and an output terminal of the gamma amplifier 10 is electrically connected to the pixel unit 4 through the data driver 2.
Alternatively, the gamma amplifier 10 may include an addition circuit or a subtraction circuit, or the like. The voltage output by the gamma amplifier is output to the pixel unit after passing through the data driver with larger driving capability. The display device 100 may further include a driving controller 6.
Optionally, the driving module 1 further includes a voltage generating module 5, an output terminal of the voltage generating module 5 is electrically connected to the second input terminal of the gamma amplifier 10, and the voltage generating module 5 is configured to output the adjustable offset voltage Vos.
Alternatively, the voltage generating module 5 may include a digital-to-analog converter, and may output voltages of different magnitudes. Alternatively, the voltage generating module 5 may include an inverter or the like. The positive and negative polarities of the offset voltage are changed by controlling the enable or disable of the inverter.
The adjustable offset voltage Vos output by the voltage generating module 5 includes 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 in magnitude.
Optionally, with continued reference to fig. 2, the gamma amplifier 10 is further provided with a switch and a peripheral circuit, where the switch is used to convert the gamma amplifier 10 and the peripheral circuit back and forth into an adder circuit or a subtractor circuit. Optionally, the peripheral circuit may include a resistor.
Specifically, with continued reference to fig. 2, the change-over switch includes 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 the first resistor R1, and is connected to the second input terminal receiving the offset voltage Vos through the second switch 2 and the second resistor R2. The non-inverting input terminal of the gamma amplifier 10 is connected to the second resistor R2 through the third switch 3. The non-inverting input terminal of the gamma amplifier 10 is connected to a first input terminal receiving the original voltage Vin (e.g., gamma voltage) through a third resistor R3. The non-inverting input of the gamma amplifier 10 is grounded through the fourth switch 4 and the fourth resistor R4. The inverting input terminal of the gamma amplifier 10 is electrically connected to the output terminal of the gamma amplifier 10 through a fifth resistor R5.
Referring to fig. 2 and 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 an adder circuit, and the voltage vout=vin+vos output from the gamma amplifier 10.
With continued reference to fig. 2 and 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 fig. 4, the gamma amplifier 10 is switched to a subtracting circuit, and the voltage vout=vin-Vos output by the gamma amplifier 10.
Note that fig. 2 to 4 exemplarily show a case where the resistances of the first resistor R1 to the fifth resistor R5 included in the peripheral circuit are all equal, and are not limited in any way.
Optionally, fig. 6 is a schematic diagram of offset voltages corresponding to each pixel unit according to an embodiment of the present invention. On the basis of the above-described embodiments, in conjunction with fig. 2 to 6, the sum of the original voltage Vin and the offset voltage Vos is the data voltage Vdata. Alternatively, the difference of the gamma voltage minus the offset voltage Vos is the data voltage Vdata.
Optionally, on the basis of the above embodiment, with continued reference to fig. 5 and fig. 6, at the first preset frequency, in the same refresh period, the offset voltages Vos corresponding to the pixel units 4 of two adjacent rows are different.
Specifically, the offset voltages Vos corresponding to the pixel units 4 of two adjacent rows may be set to be different in the same refresh period at the first preset frequency. For example, the offset voltage Vos corresponding to the pixel unit 4 of the previous row is a first offset voltage +vos, which is the gear A1, and the offset voltage Vos corresponding to the pixel unit 4 of the current row is a second offset voltage-Vos, which is the gear B1. The offset voltage Vos corresponding to the pixel unit 4 in the next row is the first offset voltage +vos, that is, the shift position A1, and so on. The first offset voltage may be a positive voltage or a negative voltage. The second offset voltage may be a positive voltage or a negative voltage.
Note that fig. 6 exemplarily shows a case of the first line L1 to the eighth line L8 when the display device 100 displays a screen at 10Hz, CHOP is a shift of the offset voltage, which includes a case of the shift A1 (for example, corresponding to one of the first offset voltage +vos and the second offset voltage-Vos) and the shift 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 cell for emitting green light. B is a pixel cell for blue light emission.
Optionally, with continued reference to fig. 6, in the first preset frequency, in the same refresh period, the offset voltages Vos corresponding to the pixel units 4 in the odd rows are the first offset voltage +vos, and the offset voltages Vos corresponding to the pixel units 4 in the even rows are the second offset voltage-Vos.
The offset voltages Vos corresponding to the pixel units 4 of the odd-even rows are alternately set to the high level H and the low level L, respectively, so that the average value of the offset voltages Vos approaches the target offset voltage, thereby further improving the display uniformity of the display device.
Optionally, with continued reference to fig. 6 based on the above embodiment, in the current refresh period, the pixel units 4 in the odd rows correspond to the first offset voltage +vos, i.e. the shift position A1, and in the next refresh period, the pixel units 4 transmitted to the odd rows correspond to the first offset voltage +vos, i.e. the shift position A1.
The arrangement is such that when switching between the current refresh period and the next refresh period, the pixel units 4 in the odd rows have the same first offset voltage +vos, namely, the shift positions A1 are all the same, so that the brightness of the pixel units 4 in the odd rows is kept consistent, and the problem of flicker between the odd rows when switching between the current refresh period and the next refresh period is well reduced.
Fig. 7 is a schematic diagram of offset voltages corresponding to pixel units according to another embodiment of the present invention. Referring to fig. 7, at a first preset frequency, in a current refresh period, the pixel units 4 of the odd-numbered rows correspond to the second offset voltage-Vos, i.e., the shift B1, and in a next refresh period, the pixel units 4 transferred to the odd-numbered rows correspond to the second offset voltage-Vos, i.e., the shift B1. The arrangement is such that when switching between the current refresh period and the next refresh period, the pixel units 4 in the odd rows have the same second offset voltage-Vos, namely, the shift positions B1 are all the same, so that the brightness of the pixel units 4 in the odd rows is kept consistent, and the problem of flicker between the odd rows when switching between the current refresh period and the next refresh period is better improved.
Still another alternative embodiment, with continued reference to fig. 7, in the current refresh cycle, the even row of pixel cells 4 corresponds to a first offset voltage +vos, i.e., gear A1, and in the next refresh cycle, the even row of pixel cells 4 corresponds to a first offset voltage +vos, i.e., gear A1. The arrangement is such that the pixel units 4 of the even rows have the same first offset voltage +vos when switching between the current refresh period and the next refresh period, so that the brightness of the pixel units 4 of the even rows is kept consistent, thereby better improving the flicker problem between the even rows when switching between the current refresh period and the next refresh period.
Still another alternative embodiment, with continued reference to fig. 6, during the current refresh period, the even row of pixel cells 4 corresponds to a second offset voltage-Vos, i.e., gear B1, and during the next refresh period, the even row of pixel cells 4 corresponds to a second offset voltage-Vos, i.e., gear B1. The arrangement is such that the pixel units 4 of the even rows have the same second offset voltage-Vos when switching between the current refresh period and the next refresh period, so that the brightness of the pixel units 4 of the even rows is kept consistent, thereby better improving the flicker problem between the even rows when switching between the current refresh period and the next refresh period.
Optionally, fig. 8 is a schematic diagram of offset voltages corresponding to each pixel unit according to another embodiment of the present invention. On the basis of the above embodiment, referring to fig. 8, at the first preset frequency, the offset voltages Vos corresponding to the pixel cells 4 of two adjacent rows are the same in the same refresh period.
Specifically, under the first preset frequency, the offset voltages Vos corresponding to the pixel units 4 of two adjacent rows can be set in the same refresh period, when the current refresh period and the next refresh period are switched, the offset voltages Vos corresponding to the pixel units 4 of all rows are the same, so that when the current refresh period and the next refresh period are switched, the offset voltages Vos corresponding to the pixel units 4 are the same, the flicker problem of the display panel 3 when the current refresh period and the next refresh period are switched can be better improved, and the display effect of the display panel 3 is further improved.
Optionally, with continued reference to fig. 8, at the first preset frequency, in the same refresh period, the offset voltages Vos corresponding to the pixel units 4 of two adjacent rows are both the first offset voltage +vos, i.e. the gear A1, on the basis of the above embodiment. Alternatively, fig. 9 is a schematic diagram of offset voltages corresponding to each pixel unit according to another embodiment of the present invention. On the basis of the above embodiment, referring to fig. 9, at the first preset frequency, in the same refresh period, the offset voltages Vos corresponding to the pixel units 4 of two adjacent rows are both the second offset voltage-Vos, i.e. the shift B1.
Specifically, the setting may be such that when the display panel 3 displays a picture in a preset frequency range with a lower frequency, the offset voltages Vos corresponding to the pixel units 4 may be set to be the first offset voltage +vos in the same refresh period. Since the offset voltages Vos corresponding to the same pixel unit 4 are the same in two adjacent refresh cycles at the first preset frequency. In two adjacent refresh periods, the offset voltage Vos corresponding to each pixel unit 4 is the first offset voltage +vos. By the arrangement, when the current refresh period and the next refresh period are switched, the offset voltage Vos corresponding to each pixel unit is the first offset voltage +vos, so that the flicker problem of the display panel 3 when the current refresh period and the next refresh period are switched can be better improved, and the display effect of the display panel 3 is further improved.
In another alternative embodiment, with continued reference to fig. 9, the offset voltages Vos corresponding to the pixel units 4 of two adjacent rows are both the second offset voltage-Vos in the same refresh period at the first preset frequency. Since the offset voltages Vos corresponding to the same pixel unit 4 are the same in two adjacent refresh cycles at the first preset frequency. In the adjacent refresh period, the offset voltage Vos corresponding to each pixel unit 4 is the second offset voltage-Vos. By setting the offset voltages Vos corresponding to the pixel units 4 are the second offset voltage-Vos when switching between the current refresh period and the next refresh period, the flicker problem of the display panel 3 when switching between the current refresh period and the next refresh period can be better improved, and the display effect of the display panel 3 is further improved.
Optionally, fig. 10 is a schematic diagram of offset voltages corresponding to each pixel unit according to another embodiment of the present invention. On the basis of the above embodiments, referring to fig. 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 two adjacent refresh periods, so as to improve the high-frequency display effect, and improve the display adverse phenomena such as brightness difference between rows, frames and frames due to the fact that the data voltage generation channels corresponding to different data lines (when offset voltages are not set for compensation) have differences in magnitude due to self output voltage fluctuation or deviation from an expected voltage value and the self output voltage fluctuation or deviation from the expected voltage value of different channels.
Wherein the second preset frequency may be greater than 10Hz. The second preset frequency may be 30Hz, 60Hz, 90Hz, 120Hz, etc. Optionally, based on the above embodiments, at the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite.
Optionally, on the basis of the foregoing embodiments, in the second preset frequency, in two adjacent refresh periods, polarities of offset voltages corresponding to the same pixel unit are opposite, and absolute values are equal.
Alternatively, based on the foregoing embodiments, with continued reference to fig. 10, in the same refresh period at the second preset frequency, offset voltages corresponding to pixel units in two adjacent rows are different.
Specifically, the arrangement can better improve the adverse phenomena such as vertical lines and the like when the display panel displays pictures at the second preset frequency.
Optionally, based on the foregoing embodiments, under a second preset frequency, in the same refresh period, the offset voltages corresponding to the pixel units in the odd rows are the first offset voltages, and the offset voltages corresponding to the pixel units in the even rows are the second offset voltages.
Specifically, the offset voltages corresponding to the odd lines and the even lines are different, so that the display effect of the display panel for displaying the picture at the second preset frequency is further improved.
Alternatively, the polarities of the first offset voltage and the second offset voltage are opposite based on the above embodiments.
Alternatively, on the basis of the above embodiments, the absolute values of the first offset voltage and the second offset voltage are equal in magnitude.
Optionally, at a first preset frequency, a refresh period includes a write frame and at least one hold frame; 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.
Specifically, the arrangement may be such that the data voltages are transferred to the pixel units in the write frame, so that the display screen of the display panel is refreshed. The data voltage is not transmitted to the pixel unit in the holding frame, so that the display panel can hold the display picture of the display panel to realize low-frequency display.
Fig. 11 is a flowchart of a driving method of a display device according to an embodiment of the present invention. The driving method of the display device can be used to drive the display device in the above-described embodiments. On the basis of the above embodiments, referring to fig. 1 and 11, an embodiment of the present invention provides a driving method of a display device, including:
s101, generating a data voltage Vdata according to an original voltage Vin and an offset voltage Vos;
s102, transmitting a data voltage Vdata to the pixel units 4 at a first preset frequency, wherein the offset voltages Vos corresponding to at least one pixel unit 4 in two adjacent refresh periods are the same.
The driving method of the display device provided in the embodiment includes generating a data voltage Vdata according to an original voltage Vin and an offset voltage Vos; transmitting a data voltage Vdata to the pixel unit 4 at a first preset frequency to drive the display device; wherein, the offset voltages Vos corresponding to at least one pixel unit 4 are the same in two adjacent refresh periods. By setting the display panel 3 in the first preset frequency and the two adjacent refresh periods, the offset voltages Vos corresponding to the same pixel unit 4 are the same, so that the light-emitting brightness corresponding to the same pixel unit 4 is the same, and when the display panel 3 switches between the current refresh period and the next refresh period included in the two adjacent refresh periods, the brightness corresponding to the offset voltages Vos can be kept unchanged in the time dimension, the flicker problem of the display panel 3 in the low-frequency display process is well reduced, and the display effect of the display device 100 is improved.
Optionally, based on the foregoing embodiments, offset voltages corresponding to pixel units in two adjacent rows are different in the same refresh period at the first preset frequency.
Optionally, based on the foregoing embodiment, under a first preset frequency, in the same refresh period, offset voltages corresponding to pixel units in odd rows are first offset voltages; the offset voltage of the pixel units of the even rows is the second offset voltage.
Alternatively, the polarities of the first offset voltage and the second offset voltage are opposite based on the above embodiments.
Alternatively, on the basis of the above embodiments, the absolute values of the first offset voltage and the second offset voltage are equal in magnitude.
Optionally, based on the foregoing embodiments, in the same refresh period at the first preset frequency, offset voltages corresponding to the pixel units of two adjacent rows are equal, for example, both positive offset voltages or negative offset voltages.
Optionally, based on the foregoing embodiments, at a second preset frequency greater than the first preset frequency, offset voltages corresponding to at least one pixel unit in two adjacent refresh periods are different, for example, offset voltages corresponding to the same pixel unit in two adjacent refresh periods are different.
Optionally, on the basis of the foregoing embodiments, at the second preset frequency, in two adjacent refresh periods, polarities of the offset voltages corresponding to the same pixel unit are opposite.
Optionally, on the basis of the foregoing embodiments, in the second preset frequency, in two adjacent refresh periods, polarities of the offset voltages corresponding to the same pixel unit are opposite, and absolute values are equal.
Optionally, based on the foregoing embodiments, offset voltages corresponding to the pixel units in two adjacent rows are different in the same refresh period at the second preset frequency.
Optionally, based on the foregoing embodiments, under a second preset frequency, in the same refresh period, offset voltages corresponding to the pixel units in the odd rows are first offset voltages, and offset voltages corresponding to the pixel units in the even rows are second offset voltages.
Optionally, on the basis of the above embodiments, polarities of the first offset voltage and the second offset voltage are opposite.
Optionally, on the basis of the foregoing embodiments, the absolute values of the first offset voltage and the second offset voltage are equal.
Alternatively, on the basis of the above embodiments, the sum of the original voltage and the offset voltage is the data voltage.
Optionally, on the basis of the foregoing embodiments, at a first preset frequency, a refresh period includes a write frame and at least one hold frame.
Alternatively, on the basis of the above embodiments, the data voltage is written to the pixel unit in the write frame, and the data voltage is not written to the pixel unit in the hold frame.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A display device, comprising:
the driving module is used for generating a data voltage according to the original voltage and the offset voltage;
the display panel is connected with the driving module and comprises pixel units which are arranged in an array manner, and the pixel units are used for receiving the data voltages;
and under the first preset frequency, the offset voltage corresponding to at least one pixel unit is the same in two adjacent refresh cycles.
2. The display device of claim 1, wherein the display device comprises a display device,
in the same refresh period, offset voltages corresponding to the pixel units of two adjacent rows are different under a first preset frequency;
preferably, in the same refresh period, the offset voltage corresponding to the pixel units in the odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units in the even-numbered rows is a second offset voltage;
preferably, the polarities of the first offset voltage and the second offset voltage are opposite;
preferably, the absolute values of the first offset voltage and the second offset voltage are equal.
3. The display device according to claim 1, wherein at a second preset frequency greater than the first preset frequency, the offset voltages corresponding to at least one pixel unit are different in adjacent two refresh cycles;
preferably, at the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite;
preferably, in the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite, and the absolute values are equal;
preferably, in the same refresh period at a second preset frequency, offset voltages corresponding to the pixel units in two adjacent rows are different;
preferably, in the same refresh period, the offset voltage corresponding to the pixel units in the odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units in the even-numbered rows is a second offset voltage;
preferably, the polarities of the first offset voltage and the second offset voltage are opposite;
preferably, the absolute values of the first offset voltage and the second offset voltage are equal.
4. The display device according to claim 1, wherein a sum of the original voltage and the offset voltage is the data voltage.
5. The display device according to claim 1, wherein the original voltage is a gamma voltage, the driving module includes a gamma amplifier and a data driver, a first input terminal of the gamma amplifier is connected to the gamma voltage, a second input terminal of the gamma amplifier is connected to an offset voltage, and an output terminal of the gamma amplifier is electrically connected to the pixel unit via the data driver;
preferably, the gamma amplifier is further provided with a change-over switch and a peripheral circuit, and the change-over switch is used for enabling the gamma amplifier and the peripheral circuit to be converted into an addition circuit or a subtraction circuit back and forth;
preferably, the peripheral circuit may include a resistor;
preferably, the driving module further comprises a voltage generating module, wherein an output end of the voltage generating module is electrically connected with the second input end of the gamma amplifier, and the voltage generating module is used for outputting an adjustable offset voltage.
6. The display device according to any one of claims 1 to 5, wherein the display device further comprises: at least one data line extending in a first direction; the driving module is electrically connected with the pixel unit of the display panel through the data line; the data line is used for transmitting the data voltage to the pixel unit;
the first direction and the row direction intersect;
preferably, the display device further includes: at least one scan line extending in a second direction; the scanning lines are electrically connected with the pixel units in the corresponding rows; the second direction is parallel to the row direction.
7. The display device of claim 1, wherein at a first predetermined frequency, one of the refresh cycles comprises a write frame and at least one hold frame;
and writing a data voltage into the pixel unit in the writing frame, and not writing the data voltage into the pixel unit in the holding frame.
8. A driving method of a display device, comprising:
generating a data voltage according to the original voltage and the offset voltage;
and transmitting data voltage to the pixel units at a first preset frequency, wherein the offset voltage corresponding to at least one pixel unit is the same in two adjacent refresh cycles.
9. The method for driving a display device according to claim 8, wherein,
in the same refresh period, offset voltages corresponding to the pixel units of two adjacent rows are different under a first preset frequency;
preferably, in the same refresh period, the offset voltage corresponding to the pixel units in the odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units in the even-numbered rows is a second offset voltage;
preferably, the polarities of the first offset voltage and the second offset voltage are opposite;
preferably, the absolute values of the first offset voltage and the second offset voltage are equal.
10. The method for driving a display device according to claim 8, wherein,
at a second preset frequency which is larger than the first preset frequency, the offset voltage corresponding to at least one pixel unit is different in two adjacent refresh cycles;
preferably, at the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite;
preferably, in the second preset frequency, in two adjacent refresh periods, the polarities of the offset voltages corresponding to the same pixel unit are opposite, and the absolute values are equal;
preferably, in the same refresh period at a second preset frequency, offset voltages corresponding to the pixel units in two adjacent rows are different;
preferably, in the same refresh period, the offset voltage corresponding to the pixel units in the odd-numbered rows is a first offset voltage, and the offset voltage corresponding to the pixel units in the even-numbered rows is a second offset voltage;
preferably, the polarities of the first offset voltage and the second offset voltage are opposite;
preferably, the absolute values of the first offset voltage and the second offset voltage are equal;
preferably, the sum of the original voltage and the offset voltage is the data voltage;
preferably, at a first preset frequency, one of the refresh cycles comprises a write frame and at least one hold frame;
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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311084618.6A CN117153082A (en) | 2023-08-24 | 2023-08-24 | Display device and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311084618.6A CN117153082A (en) | 2023-08-24 | 2023-08-24 | Display device and driving method thereof |
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| CN117153082A true CN117153082A (en) | 2023-12-01 |
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| CN202311084618.6A Pending CN117153082A (en) | 2023-08-24 | 2023-08-24 | Display device and driving method thereof |
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| CN (1) | CN117153082A (en) |
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