CN111862889B - Display device, driving device and driving method thereof - Google Patents
Display device, driving device and driving method thereof Download PDFInfo
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- CN111862889B CN111862889B CN201910350094.8A CN201910350094A CN111862889B CN 111862889 B CN111862889 B CN 111862889B CN 201910350094 A CN201910350094 A CN 201910350094A CN 111862889 B CN111862889 B CN 111862889B
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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
- G09G3/32—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 semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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Abstract
The disclosure provides a display device and a driving method thereof, and belongs to the technical field of display. The driving device of the display device comprises a driving compensation circuit, a driving voltage circuit and a signal driving circuit, wherein the driving compensation circuit is used for determining a target gray scale of a current line according to a standard gray scale of a previous line, a standard gray scale of the current line and a gray scale compensation table; the gray scale compensation table is used for recording the target gray scale of the current line corresponding to different standard gray scales of the previous line and different standard gray scales of the current line; the driving voltage circuit is used for determining the voltage value of the current line gray scale according to the current line target gray scale and the gamma correction curve; and the signal driving circuit is used for outputting a current row data voltage signal to the display panel according to the current row gray scale voltage value. The driving device of the display device can perform overdrive compensation on all standard gray scales, and improves the charging rate of pixels of a display panel.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving device of a display device, a driving method of a display device, and a display device.
Background
Display panels are being developed toward large size, high resolution, and high refresh rate. However, increasing the size, increasing the resolution, and increasing the refresh rate all adversely affect the charging rate of the display panel.
In the prior art, a Timing Controller (TCON) performs overdrive compensation on insufficiently charged pixels through a Line-by-Line overdrive (Line OD) algorithm, but the overdrive compensation is only for an intermediate gray scale and cannot compensate for both a high gray scale and a low gray scale.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure provides a display device, a driving device thereof and a driving method thereof, which are used for performing overdrive compensation on all standard gray scales and improving a charging rate of pixels of a display panel.
In order to achieve the purpose, the technical scheme adopted by the disclosure is as follows:
according to a first aspect of the present disclosure, a driving apparatus of a display apparatus is provided for outputting a current row data voltage signal to a display panel; the driving device of the display device includes:
the driving compensation circuit is used for determining the target gray scale of the current line according to the standard gray scale of the previous line, the standard gray scale of the current line and the gray scale compensation table; the gray scale compensation table is used for recording the target gray scale of the current line corresponding to different standard gray scales of the previous line and different standard gray scales of the current line;
the driving voltage circuit is used for determining the voltage value of the gray scale of the current line according to the target gray scale of the current line and the gamma correction curve; the gamma correction curve is used for recording a plurality of binding point gray scales and binding point voltage values corresponding to the binding point gray scales; the maximum binding gray scale is not less than the maximum target gray scale of the current row in the gray scale compensation table, and the minimum binding gray scale is not more than the minimum target gray scale of the current row in the gray scale compensation table;
and the signal driving circuit is used for outputting a current line data voltage signal to the display panel according to the current line gray scale voltage value.
In an exemplary embodiment of the present disclosure, the maximum current row target gray scale in the gray scale compensation table is greater than the maximum current row standard gray scale; and the minimum target gray scale of the current line in the gray scale compensation table is smaller than the minimum standard gray scale of the current line.
In an exemplary embodiment of the present disclosure, the driving voltage circuit is configured to:
the minimum current row gray scale voltage value which can be output is not more than the minimum binding point voltage value in the gamma correction curve;
the maximum current row gray scale voltage value which can be output is not less than the maximum binding point voltage value in the gamma correction curve.
In an exemplary embodiment of the present disclosure, the gamma correction curve includes a positive polarity driving gamma correction curve and a negative polarity driving gamma correction curve; the positive polarity driving gamma correction curve is used for recording a plurality of positive polarity binding gray scales and positive polarity binding voltage values corresponding to the positive polarity binding gray scales; the negative polarity driving gamma correction curve is used for recording a plurality of negative polarity binding gray scales and negative polarity binding voltage values corresponding to the negative polarity binding gray scales;
the driving voltage circuit comprises a positive polarity driving voltage circuit and a negative polarity driving voltage circuit; the positive polarity driving voltage circuit is used for determining a voltage value of a current line gray scale according to the positive polarity driving gamma correction curve and the current line target gray scale; the negative polarity driving voltage circuit is used for determining the voltage value of the gray scale of the current line according to the negative polarity driving gamma correction curve and the target gray scale of the current line.
In an exemplary embodiment of the present disclosure, the positive polarity driving voltage circuit is configured to:
the minimum voltage value of the gray scale of the current row which can be output is not more than the voltage value of the positive binding point corresponding to the minimum positive binding point gray scale; the maximum voltage value of the gray scale of the current row which can be output is not less than the positive polarity binding point voltage value corresponding to the maximum positive polarity binding point gray scale;
the negative polarity drive voltage circuit is configured to:
the minimum voltage value of the current line gray scale which can be output is not more than the voltage value of the negative polarity binding point corresponding to the maximum negative polarity binding point gray scale; the maximum voltage value of the current line gray scale which can be output is not less than the voltage value of the negative polarity binding point corresponding to the minimum negative polarity binding point gray scale.
In an exemplary embodiment of the present disclosure, the signal driving circuit includes:
the digital-to-analog conversion sub-circuit is used for converting the current row gray scale voltage value into the current row data voltage signal;
and the source electrode driving sub-circuit is used for outputting the current row data voltage signal to the display panel.
In one exemplary embodiment of the present disclosure, the driving device of the display device further includes:
the coding circuit is connected with the driving compensation circuit and is used for coding the target gray scale of the current line into the gray scale code of the current line according to a set protocol;
and the decoding circuit is connected with the coding circuit and the driving voltage circuit and is used for coding and decoding the current line gray scale into the current line target gray scale according to a set protocol.
According to a second aspect of the present disclosure, there is provided a display device including the driving device of the display device described above.
According to a third aspect of the present disclosure, there is provided a driving method applied to the above display device, the driving method including:
determining a target gray scale of a current line according to the standard gray scale of the previous line, the standard gray scale of the current line and the gray scale compensation table; the gray scale compensation table is used for recording different standard gray scales of a previous line and a target gray scale of a current line corresponding to the different standard gray scales of the current line;
determining a current line gray scale voltage value according to the current line target gray scale and the gamma correction curve; the gamma correction curve is used for recording a plurality of binding point gray scales and binding point voltage values corresponding to the binding point gray scales; the maximum binding gray scale is not less than the maximum target gray scale of the current row in the gray scale compensation table, and the minimum binding gray scale is not more than the minimum target gray scale of the current row in the gray scale compensation table;
and outputting a current row data voltage signal to the display panel according to the current row gray scale voltage value.
In an exemplary embodiment of the present disclosure, when the driving apparatus of the display apparatus includes the encoding circuit and the decoding circuit, the driving method further includes:
encoding the target gray scale of the current line into a gray scale code of the current line according to a set protocol;
and coding and decoding the current line gray scale into the current line target gray scale according to a set protocol.
According to the display device, the driving device and the driving method thereof, any standard gray scale of the current row can be compensated according to the previous row standard gray scale and the gray scale compensation table, the target gray scale of the current row corresponding to the previous row standard gray scale and the current row standard gray scale together is obtained, the defect that the maximum standard gray scale and the minimum standard gray scale cannot be compensated in the prior art is overcome, compensation of all standard gray scales is achieved, and the charging rate of pixels of the display panel is comprehensively improved.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic configuration diagram of a driving device of a display device according to an embodiment of the present disclosure.
FIG. 2 is a schematic diagram of a gray scale compensation table according to an embodiment of the disclosure.
FIG. 3 is a schematic diagram of a gamma correction curve according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a positive polarity driving voltage circuit according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a negative polarity driving voltage circuit according to an embodiment of the present disclosure.
FIG. 6 is a diagram illustrating a relationship between a voltage value of a data voltage signal and a target gray level of a current row according to an embodiment of the present disclosure.
FIG. 7 is a schematic diagram of a current row gray level coding structure according to an embodiment of the present disclosure.
FIG. 8 is a schematic diagram of a current row gray level coding structure according to an embodiment of the present disclosure.
Fig. 9 is a flow chart schematic of a driving method of an embodiment of the present disclosure.
The reference numerals of the main elements in the figures are explained as follows:
110. a drive compensation circuit; 120. a drive voltage circuit; 121. a positive polarity driving voltage circuit; 122. a negative polarity driving voltage circuit; 130. a signal driving circuit; 131. a digital-to-analog conversion sub-circuit; 132. a source driver sub-circuit; 140. an encoding circuit; 150. a decoding circuit; 160. a display panel.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
The display panel with large size, high resolution and high refresh rate can remarkably improve the display effect of the display panel and improve the use experience of people. However, increased size, increased resolution, and increased refresh rate can present challenges to the charging rate of the display panel.
In the related art, the display Panel produced by the advanced line has advantages in size and resolution, but the larger the size is, the larger the Panel Loading (Panel Loading) is, and the more serious the insufficient charging phenomenon is. Especially, when the refresh frequency reaches 120Hz at a resolution of 8K or UD (ultra high definition), the time for one line per frame of the panel is only 3.7us, and the effect of insufficient charging rate is more obvious.
In the present disclosure, a driving apparatus of a display device is provided for outputting a current row data voltage signal to a display panel 160, as shown in fig. 1, the driving apparatus of the display device includes a driving compensation circuit 110, a driving voltage circuit 120, and a signal driving circuit 130; wherein the content of the first and second substances,
the driving compensation circuit 110 is used for determining a target gray scale of a current row according to a standard gray scale of a previous row, a standard gray scale of the current row and a gray scale compensation table; the gray scale compensation table is used for recording the target gray scale of the current line corresponding to different standard gray scales of the previous line and different standard gray scales of the current line; the driving voltage circuit 120 is used for determining a current line gray scale voltage value according to the current line target gray scale and the gamma correction curve; the gamma correction curve is used for recording a plurality of Binding Point (BP) gray scales and binding Point voltage values corresponding to the binding Point gray scales; the maximum binding point gray scale is not less than the maximum target gray scale of the current row in the gray scale compensation table, and the minimum binding point gray scale is not more than the minimum target gray scale of the current row in the gray scale compensation table; the signal driving circuit 130 is used for outputting a current row data voltage signal to the display panel 160 according to the current row gray scale voltage value.
According to the driving device of the display device provided by the disclosure, the driving compensation circuit 110 can compensate any standard gray scale of the current row according to the previous row standard gray scale and the gray scale compensation table to obtain the current row target gray scale corresponding to the previous row standard gray scale and the current row standard gray scale together, so that the defect that the maximum standard gray scale and the minimum standard gray scale cannot be compensated in the prior art is overcome, the compensation of all standard gray scales is realized, and the charging rate of pixels of the display panel 160 is comprehensively improved. The driving voltage circuit 120 can generate a current line gray scale voltage value corresponding to any current line target gray scale, so that the compensation of the driving compensation circuit 110 for the current line standard gray scale is not restricted by the driving voltage circuit 120.
The following describes each component of a driving device of a display device according to an embodiment of the present disclosure in detail with reference to the accompanying drawings:
in the driving compensation circuit 110, the standard gray scale refers to an uncompensated gray scale obtained according to an original data signal, and the size and range of the standard gray scale are determined according to the gray scale mode of the sub-pixels. For example, for a sub-pixel with 8-bit display, the standard gray scale ranges from 0 to 255, i.e. the maximum standard gray scale G max 255, minimum standard gray level G min Is 0. The target gray scale is a compensated gray scale and is used for realizing overdrive compensation of the standard gray scale and overcoming the problem of insufficient charging of the sub-pixels when the standard gray scale is driven.
The gray scale compensation table is used for recording the target gray scale of the current line which corresponds to the different standard gray scales of the previous line and the different standard gray scales of the current line. It will be appreciated that, in order to achieve the maximum standard gray level G max And minimum standard gray level G min In the gray level compensation table, the different standard gray levels of the previous row may include the maximum standard gray level G max And minimum standard gray level G min The different standard gray levels of the current row may include a maximum standard gray level G max And minimum standard gray level G min 。
In one embodiment, the gray scale compensation table may record a target gray scale of the current row corresponding to the standard gray scale of each previous row and the standard gray scale of each current row. In another embodiment, the gray scale compensation table may record a target gray scale of the current row corresponding to a common standard gray scale of a plurality of specific previous rows and a common standard gray scale of a plurality of specific current rows; the driving compensation circuit 110 can fit a current line target gray scale corresponding to any previous line standard gray scale and any current line standard gray scale according to the gray scale compensation table. In another embodiment, the gray scale compensation table records a deviation value between a target gray scale of a current line and a standard gray scale of the current line, which corresponds to different standard gray scales of a previous line and different standard gray scales of the current line; the driving compensation circuit 110 can obtain the corresponding target gray scale of the current line according to the standard gray scale of the current line and the corresponding deviation value; therefore, the gray scale compensation table and the gray scale compensation table for recording the target gray scale of the current row are only equivalent in form, and are substantially the same and belong to the gray scale compensation table of the present disclosure.
In the gray level compensation table provided by the present disclosure, the range of the target gray level may exceed the range of the standard gray level, i.e. the maximum target gray level G ″ max Can be larger than the maximum standard gray scale G max Minimum target gray level G ″ min Can be smaller than the minimum standard gray scale G min . For example, in one embodiment, the maximum target gray level G' for a subpixel of an 8-bit display max And the maximum standard gray scale G max Difference Δ G of max =16, the maximum target gray level G ″ max Is 271; minimum target gray level G min And the minimum standard gray level G min Difference Δ G of min =16, the minimum target gray level G ″ min Is-16. It can be understood that Δ G max And Δ G min The size of (c) can be set according to the actual compensation requirement, and different values can be taken from the gray scale compensation tables of different display panels 160. Likewise, Δ G min May be equal to Δ G max The gray scale compensation is the same or different, so that the overdrive compensation of all standard gray scales can be realized.
The maximum current row target gray scale G' in the gray scale compensation table max Standard gray scale G larger than the maximum current line max Then, the gray scale compensation table of the present disclosure can realize the standard gray scale G with the gray scale value close to or equal to the maximum max The standard gray scale is subjected to overdrive compensation, so that the defect that the standard gray scale G with the gray scale value close to or equal to the maximum value cannot be subjected to related technologies is overcome max The standard gray scale of (2) is subjected to overdrive compensation. Similarly, the minimum current row target gray level G' in the gray level compensation table min Can be smaller than the standard gray scale G of the minimum current line min . Thus, the gray scale compensation table of the present disclosure can be realizedThe current pair of standard gray scales G with the gray scale value close to or equal to the minimum min The standard gray scale is subjected to overdrive compensation, so that the defect that the standard gray scale G with the gray scale value close to or equal to the minimum value cannot be subjected to related technologies is overcome min The standard gray scale of (2) is subjected to overdrive compensation.
Fig. 2 is a schematic diagram of a gray scale compensation table according to an embodiment of the disclosure, in which different standard gray scales of a previous row include a maximum standard gray scale 255 and a minimum standard gray scale 0, and different standard gray scales of a current row include a maximum standard gray scale 255 and a minimum standard gray scale 0. The gray scale compensation table also comprises a current row target gray scale which corresponds to different standard gray scales of a previous row and different standard gray scales of a current row. In the schematic diagram of the gray scale compensation table, a target gray scale of a current row is shown, which corresponds to a standard gray scale of a previous row of 255 and a standard gray scale of the current row of 0, and exemplarily, the target gray scale of the current row is-7. In the schematic diagram of the gray scale compensation table, a target gray scale of the current row corresponding to the standard gray scale of the previous row being 0 and the standard gray scale of the current row being 255 is also shown, and exemplarily, the target gray scale of the current row is 263. In the schematic diagram of the gray scale compensation table, the target gray scale of the current row corresponding to the other standard gray scales of the previous row and the other standard gray scales of the current row are not exemplarily shown, and are collectively represented by X. It can be understood that the target gray scale of each current row in the gray scale compensation table can be determined by an experimental method, and the target gray scale of the current row corresponding to the standard gray scale of the same previous row and the target gray scale of the current row in the gray scale compensation table can be different under different maximum brightness conditions of different display panels or the same display panel.
In one embodiment, the driving compensation circuit 110 may include a compensation table sub-circuit and a compensation sub-circuit, the compensation table sub-circuit is used for storing a gray scale compensation table, and the compensation sub-circuit is connected to the compensation table sub-circuit and is used for obtaining a previous row standard gray scale and a current row standard gray scale and determining a current row target gray scale according to the gray scale compensation table. Optionally, the compensation table sub-circuit may include a memory.
The gamma correction curve is used for recording different binding point gray scales and binding point voltage values corresponding to the binding point gray scales so as to realize gamma correction on the target gray scale of the current row. Maximum binding gray level G g max Not less than the maximum current row target gray level G' in the gray level compensation table max Thus, it can be ensured that the gamma correction curve can be applied to the standard gray scale G larger than the maximum max The gray scale of (2) is gamma corrected. Minimum binding gray level G g min Not greater than the minimum current row target gray level G' in the gray level compensation table min Thus, it can be ensured that the gamma correction curve can be applied to the standard gray scale G smaller than the minimum max The gray scale of (2) is gamma corrected.
The binding gray levels are a plurality of fixed gray levels, and the binding gray levels can be continuous or discontinuous. For example, gray scales of-16, 0, 1, 31, 63, 127, 191, 223, 254, 255, 272, etc. may be selected as the binding gray scale. In one embodiment, the maximum binding gray level may be equal to the maximum current line target gray level, and the minimum binding gray level may be equal to the minimum current line target gray level. The binding voltage value is a voltage value corresponding to the binding gray scale after gamma correction. For different display panels or different maximum brightness requirements of the same display panel, the binding voltage values corresponding to the binding gray scales can be different. In the gamma correction curve, the number of the binding point gray scales and the gray scale value of each binding point gray scale are set so as to achieve the gamma correction of the target gray scale of the current row, and the disclosure is not particularly limited.
In one embodiment, the binding gray level in the gamma correction curve may include the maximum standard gray level G max And minimum standard gray level G min 。
The driving voltage circuit 120 may include a gamma correction sub-circuit for recording a gamma correction curve. In one embodiment, the gamma correction sub-circuit may include a set of gamma registers.
The driving voltage circuit 120 is configured to generate a gamma-corrected current row gray scale voltage value (i.e., a gamma voltage value of a current row) according to the gamma correction curve and the current row target gray scale. It is understood that the driving voltage circuit 120 may be configured to: the minimum current row gray scale voltage value which can be output is not more than the minimum binding point voltage value in the gamma correction curve; the maximum current row gray scale voltage value which can be output is not less than the maximum binding point voltage value in the gamma correction curve. Therefore, the driving voltage circuit 120 can convert the gray scales exceeding the standard gray scale range into corresponding gray scale voltage values, and the situation that the driving voltage circuit 120 is not matched with the gray scale compensation table to restrict the overdrive compensation of all the standard gray scales is avoided.
It can be understood that, when a current row target gray scale is the same as a binding gray scale and a binding voltage value corresponding to the binding gray scale is the minimum binding voltage value in the gamma correction curve, the voltage value of the current row data voltage signal output by the driving device needs to be equal to the minimum binding voltage value, otherwise, the display panel cannot normally display due to insufficient charging rate. If the minimum current row gray scale voltage value that the driving voltage circuit 120 can output is greater than the minimum binding voltage value in the gamma correction curve, the driving voltage circuit 120 cannot output the minimum binding voltage value, and the display panel cannot normally display.
Similarly, when a current row target gray scale is the same as a binding gray scale and the binding voltage value corresponding to the binding gray scale is the maximum binding voltage value in the gamma correction curve, the voltage value of the current row data voltage signal output by the driving device needs to be equal to the maximum binding voltage value, otherwise, the display panel cannot normally display due to insufficient charging rate. If the maximum current row gray scale voltage value that the driving voltage circuit 120 can output is smaller than the maximum binding voltage value in the gamma correction curve, the driving voltage circuit 120 cannot output the maximum binding voltage value, and the display panel cannot normally display.
In one embodiment, the sub-pixels may be driven by ac, and the gamma correction curve may include a positive polarity driving gamma correction curve and a negative polarity driving gamma correction curve. The positive polarity driving gamma correction curve is used for recording a plurality of positive polarity binding gray scales and positive polarity binding voltage values corresponding to the positive polarity binding gray scales; the negative polarity driving gamma correction curve is used for recording a plurality of negative polarity binding gray scales and negative polarity binding voltage values corresponding to the negative polarity binding gray scales.
It can be understood that the sub-pixel comprises a first electrode and a second electrode which are oppositely arranged, the first electrode is connected with the data line and is used for loading the voltage signal of the current row of data; the second electrode is used for loading a reference voltage signal and is often used as a common electrode. The positive polarity driving does not indicate that the voltage value of the current row data voltage signal is a positive value, but indicates that the voltage value of the current row data voltage signal is higher than that of the reference voltage signal; therefore, the positive polarity tie-point voltage value is not necessarily a positive voltage value. The negative polarity driving does not indicate that the voltage value of the current row data voltage signal is a negative value, but indicates that the voltage value of the current row data voltage signal is lower than that of the reference voltage signal; therefore, the negative polarity binding voltage value is not necessarily a negative voltage value.
Therefore, after the target gray scale of the current line is obtained, whether the current line needs to adopt positive polarity driving or negative polarity driving needs to be determined; if positive polarity driving is adopted, gamma correction is needed to be carried out on the target gray scale of the current row according to the positive polarity driving gamma correction curve; if the negative polarity driving is adopted, gamma correction is required to be carried out on the target gray scale of the current line according to the negative polarity driving gamma correction curve.
FIG. 3 shows an exemplary gamma correction curve for gamma correction of an 8-bit sub-pixel. The gamma correction curve diagram shows a positive polarity driving gamma correction curve and a negative polarity driving gamma correction curve.
Wherein, in the positive polarity gamma correction curve, the maximum positive polarity tie-point gray scale G g max (+) 272, maximum positive polarity binding gray level G max (+) is 255; minimum positive polarity binding gray scale G g min (+) is-16, minimum positive polarity standard gray scale G min (+) is 0. The positive polarity gamma correction curve also gives the binding voltage value corresponding to each positive polarity binding gray scale.
Wherein, negative polarityThe maximum negative polarity binding gray scale G in the gamma correction curve g max (-) 272, maximum negative standard gray level G max (-) is 255; minimum negative polarity binding gray level G g min Negative standard gray scale G with (-) 16 as minimum min (-) is 0. The negative polarity gamma correction curve also provides a binding voltage value corresponding to each negative polarity binding gray scale.
Accordingly, the driving voltage circuit 120 may include a positive polarity driving voltage circuit 121 and a negative polarity driving voltage circuit 122; the positive polarity driving voltage circuit 121 is configured to determine a current line gray scale voltage value according to the positive polarity driving gamma correction curve and the current line target gray scale; the negative polarity driving voltage circuit 122 is used for determining a current line gray scale voltage value according to the negative polarity driving gamma correction curve and the current line target gray scale.
The positive polarity driving voltage circuit 121 is configured to: the minimum current row gray scale voltage value which can be output is not more than the positive polarity binding point voltage value corresponding to the minimum positive polarity binding point gray scale; the maximum voltage value of the current line gray scale which can be output is not less than the positive polarity binding voltage value corresponding to the maximum positive polarity binding gray scale.
It can be understood that, as shown in FIG. 3, when the positive polarity driving is performed, if a current row target gray scale is associated with the minimum positive polarity binding gray scale G g min (+) the same, the voltage value of the current row data voltage signal outputted by the driving device needs to be equal to G g min Positive binding voltage value V corresponding to (+) symbol g min (+) otherwise, the display panel cannot display normally due to insufficient charging rate. If the minimum gray-scale voltage value of the current row that can be outputted by the positive driving voltage circuit 121 is greater than G g min Positive binding voltage value V corresponding to (+) symbol g min (+), then the positive polarity driving voltage circuit 121 cannot output V g min (+) to cause the display panel not to display normally.
Similarly, when performing positive polarity driving, if a current row target gray scale is tied to the maximum positive polarity G gray scale g max (+) the same, the voltage value of the current row data voltage signal outputted by the driving device needs to be equal to G g max Positive polarity binding voltage value V corresponding to (+) position g max (+) otherwise, the display panel cannot display normally due to insufficient charging rate. If the maximum current row gray scale voltage value that the positive polarity driving voltage circuit 121 can output is less than G g max Positive binding voltage value V corresponding to (+) symbol g max (+), then the positive polarity driving voltage circuit 121 cannot output V g max (+) to cause the display panel not to display normally.
In one embodiment, the positive polarity driving voltage circuit 121 is provided with a plurality of positive polarity output terminals, and the plurality of positive polarity output terminals may correspond to the plurality of positive polarity binding point gray scales in the positive polarity gamma correction curve one to one; the gray scale voltage value output by the positive polarity output end corresponding to any positive polarity binding gray scale is equal to the positive polarity binding voltage value corresponding to the positive polarity binding gray scale.
For example, as shown in fig. 4, at least a first positive polarity output terminal P may be disposed on the positive polarity driving voltage circuit 121 g max (+), the second positive polarity output terminal P max (+), third positive polarity output terminal P min (+) and fourth positive polarity output terminal P g min (+)。
Wherein the first positive polarity output terminal P g max (+) and maximum positive polarity binding gray level G g max (+) corresponds to the positive polarity binding gray scale G with the maximum output gray scale voltage value g max Positive binding voltage value V corresponding to (+) symbol g max (+)。
Wherein the second positive polarity output terminal P max (+) and maximum positive polarity standard gray level G max (+) corresponds to the positive polarity standard gray scale G with the maximum output gray scale voltage value max Positive binding voltage value V corresponding to (+) symbol max (+)。
Wherein the third positive polarity output terminal P min (+) and minimum positive polarity standard gray level G min (+) phaseCorrespondingly, the output gray scale voltage value is equal to the minimum positive standard gray scale G min Positive binding voltage value V corresponding to (+) symbol min (+)。
Wherein the fourth positive polarity output terminal P g min (+) and minimum positive polarity binding gray level G g min (+) corresponds to the positive polarity binding gray scale G with the minimum output gray scale voltage value g min Positive binding voltage value V corresponding to (+) symbol g min (+)。
In one embodiment, when the current row is driven with positive polarity, if the target gray scale of the current row is located between two adjacent positive polarity binding gray scales, the positive polarity driving voltage circuit 121 may output the gray scale voltage value corresponding to the target gray scale of the current row by internal resistance voltage division.
The negative polarity drive voltage circuit 122 is configured to: the minimum current row gray scale voltage value which can be output is not more than the negative polarity binding voltage value corresponding to the maximum negative polarity binding gray scale; the maximum current row gray scale voltage value which can be output is not less than the negative polarity binding voltage value corresponding to the minimum negative polarity binding gray scale.
It can be understood that, as shown in FIG. 3, when performing the negative polarity driving, if a current row target gray level is tied to the maximum negative polarity G gray level g max (-) same, the voltage value of the current row data voltage signal output by the driving device needs to be equal to G g max Negative binding voltage value V corresponding to (-) value g max (-) otherwise the display panel will not display properly due to insufficient charging rate. If the minimum gray scale voltage value of the current row that can be outputted by the negative polarity driving voltage circuit 122 is larger than G g max Negative binding voltage value V corresponding to (-) g max (-), then the negative polarity driving voltage circuit 122 cannot output V g max (-) and thus the display panel cannot display normally.
Similarly, when performing negative polarity driving, if a current row target gray level is tied to the minimum negative polarity gray level G g min The (-) is the same as the standard deviation of the standard deviation,the voltage value of the current row data voltage signal output by the driving device needs to be equal to G g min Negative binding voltage value V corresponding to (-) value g min (-) otherwise the display panel will not display properly due to insufficient charging rate. If the maximum current row gray scale voltage value that can be output by the negative polarity driving voltage circuit 122 is less than G g min Negative binding voltage value V corresponding to (-) value g min (-), then the negative polarity driving voltage circuit 122 cannot output V g min (-) and thus the display panel cannot display normally.
In one embodiment, the negative polarity driving voltage circuit 122 has a plurality of negative polarity output terminals, and the plurality of negative polarity output terminals can correspond to the plurality of negative polarity binding point gray scales in the negative polarity gamma correction curve one by one; the gray scale voltage value output by the negative polarity output end corresponding to any negative polarity binding gray scale is equal to the negative polarity binding voltage value corresponding to the negative polarity binding gray scale.
For example, as shown in fig. 5, at least a first negative output terminal P may be disposed on the negative driving voltage circuit 122 g max (-) -second negative polarity output terminal P max (-) -third negative polarity output terminal P min (-) and fourth negative polarity output terminal P g min (-)。
Wherein the first negative polarity output terminal P g max (-) and maximum negative polarity binding Gray level G g max (-) corresponds to the maximum negative polarity binding gray scale G g max Negative binding voltage value V corresponding to (-) g max (-)。
Wherein the second negative polarity output terminal P max (-) and maximum negative standard gray scale G max (-) corresponding to the maximum negative standard gray scale G max Negative binding voltage value V corresponding to (-) value max (-)。
Wherein the third negative polarity output terminal P min (-) and minimum negative polarity Standard Gray level G min (-) corresponds, its outputThe gray scale voltage value is equal to the minimum negative standard gray scale G min Negative binding voltage value V corresponding to (-) value min (-)。
Wherein the fourth negative polarity output terminal P g min (-) minimum negative polarity binding Gray level G g min (-) corresponds to the minimum negative binding gray level G g min Negative binding voltage value V corresponding to (-) value g min (-)。
In one embodiment, when the current row is driven with negative polarity, if the target gray level of the current row is located between two adjacent negative polarity binding gray levels, the negative polarity driving voltage circuit 122 may output the gray level voltage value corresponding to the target gray level of the current row by internal resistance voltage division.
As shown in fig. 1, the signal driving circuit 130 may include a digital-to-analog conversion sub-circuit 131 and a source driving sub-circuit 132, wherein the digital-to-analog conversion sub-circuit 131 is configured to convert the current row gray scale voltage value into a current row data voltage signal; the source driving sub-circuit 132 is used for outputting the current row data voltage signal to the display panel 160.
It is understood that the digital-to-analog converting sub-circuit 131 needs to have sufficient digital-to-analog converting capability to convert any current row gray scale voltage value into a corresponding data voltage to form a data voltage signal. Therefore, the digital-to-analog conversion sub-circuit 131 may be set such that the voltage value of the maximum voltage that can be output is not less than the maximum value of the voltage value of the current row gray scale and the voltage value of the minimum voltage that can be output is not more than the minimum value of the voltage value of the current row gray scale.
FIG. 6 shows the relationship between the voltage values of the data voltage signals and the target gray levels of the current row. As can be seen from FIG. 6, when the current row is driven with positive polarity, the driving voltage circuit 120 and the signal driving circuit 130 can respond to the maximum target gray level G' of the current row max Outputting corresponding data voltage signal with voltage value V ″, wherein max (+) is greater than V max (+). The driving voltage circuit 120 and the signal driving circuit 130 may respond to the minimum current row target gray level G ″ min Outputting corresponding data voltage signal, wherein the voltage value V' of the data voltage signal min (+) less than V min (+)。
The driving voltage circuit 120 and the signal driving circuit 130 can respond to the maximum current row target gray scale G' when the current row is driven with negative polarity max Outputting corresponding data voltage signal, wherein the voltage value V' of the data voltage signal max (-) less than V max (-). The driving voltage circuit 120 and the signal driving circuit 130 may respond to the minimum current row target gray scale G ″ min Outputting corresponding data voltage signal with voltage value V ″, wherein min (-) greater than V min (-)。
It is understood that the driving compensation circuit 110, the driving voltage circuit 120 and the signal driving circuit 130 may be disposed on the same circuit board, or disposed on different circuit boards.
In an embodiment, the driving compensation circuit 110 may be disposed on a Timing Controller (TCON), the driving voltage circuit 120 and the signal driving circuit 130 may be disposed on a source driver (source driver), and the driving compensation circuit 110 and the driving voltage circuit 120 may communicate with each other in a wired or wireless manner.
In one embodiment, as shown in fig. 1, the driving apparatus of the display apparatus may further include an encoding circuit 140 and a decoding circuit 150, wherein the encoding circuit 140 is connected to the driving compensation circuit 110, and is configured to receive the current line target gray scale and encode the current line target gray scale into a current line gray scale code according to a set protocol; the decoding circuit 150 is connected to the encoding circuit 140 and the driving voltage circuit 120, and is configured to receive the current row gray scale code, decode the current row gray scale code into a current row target gray scale according to a set protocol, and transmit the current row target gray scale to the driving voltage circuit 120.
The set protocol can be determined according to the requirement, so that the gray scale code of the current line and the target gray scale of the current line can present a one-to-one corresponding relation.
In one embodiment, as shown in fig. 7, according to a set protocol, the current row gray-scale code may include a positive compensation check bit, a negative compensation check bit, and a basic encoding area; the basic coding area can realize all the codes of standard gray scales in a binary mode.
When the encoding circuit 140 encodes the target gray level of the current row, if the target gray level G' of the current row is larger than the maximum standard gray level G max Then calculate G' -G max (ii) a Marking positive compensation check bits and not marking negative compensation check bits, and performing binary mode on G' -G in the basic coding region max And coding to form the gray level code of the current line.
When the encoding circuit 140 encodes the target gray level of the current row, if the target gray level G' of the current row is smaller than the minimum standard gray level G min Then calculate G min -G'; marking negative compensation check bits and not marking positive compensation check bits, and performing binary mode on G in the basic coding region min G' is encoded to form the gray level code of the current line.
When the encoding circuit 140 encodes the target gray level of the current row, if the target gray level G' of the current row is not greater than the maximum standard gray level G max And not less than the minimum standard gray level G min If yes, then no negative compensation check bit and no positive compensation check bit are marked, and G' is coded in the basic coding area in a binary mode to form the gray scale code of the current row.
Correspondingly, when the decoding circuit 150 decodes the current row gray scale code, if the positive compensation check bit is marked and the negative compensation check bit is not marked, the base gray scale G ″ corresponding to the binary code of the base encoding area is calculated, and the target gray scale G' of the current row is determined to be the base gray scale G ″ and the maximum standard gray scale G ″ max Or G '= G' + G max 。
When the decoding circuit 150 decodes the current row gray scale code, if the positive compensation check bit is not marked and the negative compensation check bit is marked, the base gray scale G ″ corresponding to the binary code of the base encoding area is calculated, and the target gray scale G' of the current row is determined to be the minimum standard gray scale G ″ min Difference from the base gray level G ', i.e. G' = G min -G``。
When the decoding circuit 150 decodes the current row gray scale code, if the positive compensation check bit is not marked and the negative compensation check bit is not marked, the base gray scale G ″ corresponding to the binary code of the base encoding area is calculated, and it is determined that the current row target gray scale G' is the base gray scale G ″, i.e., G = G ″.
For example, as shown in fig. 8, for a sub-pixel displayed with 8 bits, the current row gray level coding may include 10 bits, where the first bit is used as a negative compensation check bit, the second bit is used as a positive compensation check bit, and the remaining 8 bits are used as a basic coding region, and the basic coding region may implement coding of all standard gray levels of the sub-pixel. If the positive compensation check bit is 1, marking the positive compensation check bit; if the forward compensation parity bit is 0, the forward compensation parity bit is not marked. Similarly, if the negative compensation parity bit is 1, the negative compensation parity bit is marked; if the negative-going compensation check bit is 0, then the negative-going compensation check bit is not marked.
As shown in FIG. 8, based on the setting protocol of this example, if the target gray level of the current row is-7, the corresponding gray level of the current row is encoded as 1000000111; if the target gray level of the current row is 263, the corresponding gray level of the current row is 0100000111.
In one embodiment, the encoding circuit 140 may be disposed on the timing controller, and the decoding circuit 150 may be disposed on the source driver.
The present disclosure also provides a display device including the driving device of the display device described in the above-described driving device embodiment of the display device. The display device may be an LCD display device, an OLED display device, or other types of display devices, which are not particularly limited in this disclosure.
In one embodiment, the display device of the present disclosure is a large-sized display device, such as a television, a computer monitor, an electronic picture screen, or an electronic billboard.
In another embodiment, the display device of the present disclosure is a high-resolution display device, and may be, for example, a 4K display device, an 8K display device, or an ultra high-definition display device.
In another embodiment, the display device of the present disclosure is a display device with a high refresh rate, for example, a mobile phone screen, a television or a computer screen with a refresh rate not less than 120 HZ.
Since the driving device of the display device of the present disclosure is the same as the driving device of the display device described in the above embodiment of the driving device of the display device, the same advantageous effects are obtained, and the details of the present disclosure are not repeated herein.
The present disclosure also provides a driving method applied to the display device described in the above display device embodiments. As shown in fig. 9, the driving method includes:
step S110, determining a target gray scale of a current line according to a standard gray scale of a previous line, a standard gray scale of the current line and a gray scale compensation table; the gray scale compensation table is used for recording different standard gray scales of a previous line and a target gray scale of a current line corresponding to the different standard gray scales of the current line;
step S120, determining the voltage value of the gray scale of the current line according to the target gray scale of the current line and the gamma correction curve; the gamma correction curve is used for recording a plurality of binding point gray scales and binding point voltage values corresponding to the binding point gray scales; the maximum binding point gray scale is not less than the maximum target gray scale of the current row in the gray scale compensation table, and the minimum binding point gray scale is not more than the minimum target gray scale of the current row in the gray scale compensation table;
in step S130, the current row data voltage signal is outputted to the display panel 160 according to the current row gray scale voltage value.
According to the driving method provided by the disclosure, any standard gray scale of the current row can be compensated according to the previous row standard gray scale and the gray scale compensation table, so that the current row target gray scale corresponding to the previous row standard gray scale and the current row standard gray scale together is obtained, the defect that the maximum standard gray scale and the minimum standard gray scale cannot be compensated in the prior art is overcome, the compensation of all standard gray scales is realized, and the charging rate of the display panel 160 is comprehensively improved.
In an embodiment, when the driving device of the display device includes the encoding circuit 140 and the decoding circuit 150, the driving method may further include:
step S210, after step S110 and before step S120, the target gray level of the current line is coded into the gray level code of the current line according to a set protocol;
step S220, after the step S210 and before the step S120, the current line gray scale is encoded and decoded into the current line target gray scale according to the set protocol.
Thus, the current row target gray scale can be transmitted from the driving compensation circuit 110 to the driving voltage circuit 120. Especially, when the driving compensation circuit 110 and the driving voltage circuit 120 are respectively disposed on the timing controller and the source driver, the steps S210 and S220 can ensure that the current row target gray scale is accurately transferred from the timing controller to the source driver.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc., are all considered part of this disclosure.
It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.
Claims (7)
1. A driving apparatus of a display device for outputting a current row data voltage signal to a display panel, the driving apparatus comprising:
the driving compensation circuit is used for determining the target gray scale of the current line according to the standard gray scale of the previous line, the standard gray scale of the current line and the gray scale compensation table; the gray scale compensation table is used for recording the target gray scale of the current line corresponding to different standard gray scales of the previous line and different standard gray scales of the current line; the maximum target gray scale of the current row in the gray scale compensation table is larger than the maximum standard gray scale of the current row; the minimum target gray scale of the current row in the gray scale compensation table is smaller than the minimum standard gray scale of the current row;
the driving voltage circuit is used for determining the gray scale voltage value of the current line according to the target gray scale of the current line and a gamma correction curve; the gamma correction curve is used for recording a plurality of binding point gray scales and binding point voltage values corresponding to the binding point gray scales; the maximum binding gray scale is not less than the maximum target gray scale of the current row in the gray scale compensation table, and the minimum binding gray scale is not more than the minimum target gray scale of the current row in the gray scale compensation table; the binding voltage value is a voltage value corresponding to the binding gray scale after gamma correction;
the signal driving circuit is used for outputting a current row data voltage signal to the display panel according to the current row gray scale voltage value;
the coding circuit is connected with the driving compensation circuit and is used for coding the target gray scale of the current line into the gray scale code of the current line according to a set protocol; the current row gray scale code comprises a positive compensation check bit, a negative compensation check bit and a basic coding area; the basic coding area can realize coding of all standard gray scales in a binary mode; if the target gray scale G' of the current row is larger than the maximum standard gray scale G max Then calculate G' -G max Marking the positive compensation check bits and not marking the negative compensation check bits, and performing binary mode on the basic coding area to G' -G max Coding to form a current line gray scale code; if the target gray scale G' of the current row is smaller than the minimum standard gray scale G min Then calculate G min -G', marking said negative compensation check bits and not marking said positive compensation check bits, and binary-pairing G in said base encoding area min G' is coded to form a current row gray scale code; if the target gray level G' of the current row is not greater than the maximum standard gray level G max And not less than the minimum standard gray level G min If yes, the negative compensation check bit and the positive compensation check bit are not marked, and the target gray scale G' of the current line is coded in the basic coding area in a binary mode to form a gray scale code of the current line;
the decoding circuit is connected with the coding circuit and the driving voltage circuit and is used for coding and decoding the current line gray scale into the current line target gray scale according to a set protocol; if the positive compensation check bit is marked and the negative compensation check bit is not marked, calculating a base gray scale G 'corresponding to the binary coding of the base coding region, and further determining the target gray scale G' of the current row as the base gray scale G 'and the maximum standard gray scale G' max The sum of (1), i.e. the current row target gray level G '= G' + G max (ii) a If the positive compensation check bit is not marked and the negative compensation check bit is marked, calculating a base gray scale G 'corresponding to the binary coding of the base coding region, and further determining that the target gray scale G' of the current row is the minimum standard gray scale G min The difference with the base gray level G ', i.e. the current row target gray level G' = G min -G'; if the positive compensation check bit is not marked and the negative compensation check bit is not marked, calculating a base gray scale G ' corresponding to the binary coding of the base coding region, and further determining that the target gray scale G ' of the current row is the base gray scale G ', namely G ' = G '.
2. The driving device of the display device according to claim 1, wherein the driving voltage circuit is configured to:
the minimum current row gray scale voltage value which can be output is not more than the minimum binding point voltage value in the gamma correction curve;
the maximum current row gray scale voltage value which can be output is not less than the maximum binding point voltage value in the gamma correction curve.
3. The driving device of a display device according to claim 2, wherein the gamma correction curve includes a positive polarity driving gamma correction curve and a negative polarity driving gamma correction curve; the positive polarity driving gamma correction curve is used for recording a plurality of positive polarity binding gray scales and positive polarity binding voltage values corresponding to the positive polarity binding gray scales; the negative polarity driving gamma correction curve is used for recording a plurality of negative polarity binding gray scales and negative polarity binding voltage values corresponding to the negative polarity binding gray scales;
the driving voltage circuit comprises a positive polarity driving voltage circuit and a negative polarity driving voltage circuit; the positive polarity driving voltage circuit is used for determining a current line gray scale voltage value according to the positive polarity driving gamma correction curve and a current line target gray scale; the negative polarity driving voltage circuit is used for determining the voltage value of the gray scale of the current line according to the negative polarity driving gamma correction curve and the target gray scale of the current line.
4. The driving device of a display device according to claim 3,
the positive polarity drive voltage circuit is configured to:
the minimum voltage value of the gray scale of the current row which can be output is not more than the voltage value of the positive binding point corresponding to the minimum positive binding point gray scale; the maximum voltage value of the gray scale of the current row which can be output is not less than the positive polarity binding point voltage value corresponding to the maximum positive polarity binding point gray scale;
the negative polarity drive voltage circuit is configured to:
the minimum voltage value of the current line gray scale which can be output is not more than the voltage value of the negative polarity binding point corresponding to the maximum negative polarity binding point gray scale; the maximum voltage value of the current line gray scale which can be output is not less than the voltage value of the negative polarity binding point corresponding to the minimum negative polarity binding point gray scale.
5. The driving device of a display device according to claim 1, wherein the signal driving circuit comprises:
the digital-to-analog conversion sub-circuit is used for converting the current row gray scale voltage value into the current row data voltage signal;
and the source electrode driving sub-circuit is used for outputting the current row data voltage signal to the display panel.
6. A display device comprising the driving device of the display device according to any one of claims 1 to 5.
7. A driving method applied to the display device according to claim 6, wherein the driving method comprises:
determining a target gray scale of a current line according to the standard gray scale of the previous line, the standard gray scale of the current line and the gray scale compensation table; the gray scale compensation table is used for recording different standard gray scales of a previous line and a target gray scale of a current line corresponding to the different standard gray scales of the current line; the maximum target gray scale of the current row in the gray scale compensation table is larger than the maximum standard gray scale of the current row; the minimum target gray scale of the current row in the gray scale compensation table is smaller than the minimum standard gray scale of the current row; the binding voltage value is a voltage value corresponding to the binding gray scale after gamma correction;
encoding the target gray scale of the current line into a gray scale code of the current line according to a set protocol; the current line gray scale code comprises a positive compensation check bit, a negative compensation check bit and a basic coding region; the basic coding area can realize coding of all standard gray scales in a binary mode; if the target gray scale G' of the current row is larger than the maximum standard gray scale G max Then calculate G' -G max Marking the positive compensation check bits and not marking the negative compensation check bits, and performing binary mode on G' -G in the basic encoding area max Coding to form a current line gray scale code; if the target gray scale G' of the current row is smaller than the minimum standard gray scale G min Then calculate G min -G', marking said negative compensationCheck bits without marking the positive compensation check bits, and the G is subjected to binary mode in the basic coding area min G' is coded to form a current row gray scale code; if the target gray level G' of the current row is not greater than the maximum standard gray level G max And not less than the minimum standard gray level G min If yes, the negative compensation check bit and the positive compensation check bit are not marked, and the target gray scale G' of the current line is coded in the basic coding area in a binary mode to form a gray scale code of the current line;
encoding and decoding the current line gray scale into the current line target gray scale according to a set protocol; if the positive compensation check bit is marked and the negative compensation check bit is not marked, calculating a base gray scale G 'corresponding to the binary coding of the base coding region, and further determining the target gray scale G' of the current row as the base gray scale G 'and the maximum standard gray scale G' max The sum of (1), i.e. the current row target gray level G '= G' + G max (ii) a If the positive compensation check bit is not marked and the negative compensation check bit is marked, calculating a base gray scale G 'corresponding to the binary coding of the base coding region, and further determining that the target gray scale G' of the current row is the minimum standard gray scale G min The difference with the basic gray level G ', i.e. the target gray level G' = G in the current column min -G'; if the positive compensation check bit is not marked and the negative compensation check bit is not marked, calculating a base gray scale G ' corresponding to the binary coding of the base coding region, and further determining that the target gray scale G ' of the current row is the base gray scale G ', namely G ' = G ';
determining a current line gray scale voltage value according to the current line target gray scale and the gamma correction curve; the gamma correction curve is used for recording a plurality of binding point gray scales and binding point voltage values corresponding to the binding point gray scales; the maximum binding gray scale is not less than the maximum target gray scale of the current row in the gray scale compensation table, and the minimum binding gray scale is not more than the minimum target gray scale of the current row in the gray scale compensation table;
and outputting a current row data voltage signal to the display panel according to the current row gray scale voltage value.
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