CN109036255A - A kind of display driving method, display drive apparatus and display equipment - Google Patents
A kind of display driving method, display drive apparatus and display equipment Download PDFInfo
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- CN109036255A CN109036255A CN201811162756.0A CN201811162756A CN109036255A CN 109036255 A CN109036255 A CN 109036255A CN 201811162756 A CN201811162756 A CN 201811162756A CN 109036255 A CN109036255 A CN 109036255A
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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
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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
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Abstract
The invention discloses a kind of display driving method, display drive apparatus and display equipment, and wherein the display driving method obtains the reference voltage of each public electrode based on pre-display grayscale；Reference voltage is the display picture of the first public electrode under pre-display grayscale when flicker value minimum, the voltage that driving chip is exported to the first public electrode；The offset voltage of the second public electrode is determined with respect to the position distribution of the first public electrode according to the driving current of the second public electrode under pre-display grayscale and the second public electrode；Voltage after using the offset voltage of the second public electrode to compensate its reference voltage is as target common voltage；Use the reference voltage of the first public electrode as the target common voltage of the first public electrode.The embodiment of the present invention realizes the output voltage of the position adjustment driving chip of the grayscale and each public electrode according to each public electrode next frame picture to be shown, reduces display film flicker and ghost phenomena.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of display driving method, display drive apparatus and
Show equipment.
Background technique
With the development of display technology, people show that the quality requirements of picture are higher and higher for display device.
Display device for mounting on vehicle in the prior art, generally includes viewing area and non-display area, and pixel electrode is arranged in viewing area
With multiple public electrode blocks, the driving chip that non-display area is arranged in is connect with each public electrode block by metal wire.Aobvious
Show the stage, for driving chip by metal wire to multiple same voltages of public electrode block output phase, the voltage is corresponding for a certain grayscale value
It is best common voltage.For ideal driving voltage, under positive frame and negative frame condition, each position pixel electrode of display device with
Driving voltage absolute value of the difference is equal between public electrode, shows that picture quality is good in such cases, is not in picture
Face flashing and ghost phenomena.
However, being caused each since public electrode blocks different in actual displayed device are different from the distance between driving chip
The metal wire connected between a public electrode block and driving chip it is different in size, cause the resistance of each metal line different.It drives
Dynamic chip to each public electrode block output phase with voltage when, the voltage swing that each public electrode block is an actually-received is different,
Driving voltage difference when finally display device different location being made to be in positive frame and negative frame between pixel electrode and public electrode is not
It is equal, cause the problem of showing film flicker and ghost.Also, since driving chip output voltage is that a certain grayscale is corresponding most
Good common voltage, when showing that picture shows other grayscale, common voltage be not it is best, more aggravated display film flicker and
The problem of ghost.
Summary of the invention
The present invention provides a kind of display driving method, display drive apparatus and display equipment, improves display picture to realize
Quality, reduce display device film flicker and ghost phenomena.
In a first aspect, the embodiment of the invention provides a kind of display driving method, for driving display panel, display panel
Including multiple public electrodes and multiple pixel electrodes, public electrode include one first public electrode and except the first public electrode with
The second outer public electrode, display driving method include:
The reference voltage of each public electrode is obtained based on pre-display grayscale；Reference voltage is that the first public electrode is corresponding
Picture is shown under pre-display grayscale when flicker value minimum, the voltage that driving chip is exported to the first public electrode；
It is public according to the driving current of the second public electrode under pre-display grayscale and the second public electrode relatively first
The position distribution of electrode determines the offset voltage of the second public electrode；
Voltage after using the offset voltage of the second public electrode to compensate its reference voltage is as target common voltage；
Use the reference voltage of the first public electrode as the target common voltage of the first public electrode.
Second aspect, the embodiment of the invention also provides a kind of display drive apparatus, for driving display panel, display surface
Plate includes multiple public electrodes and multiple pixel electrodes, and public electrode is including one first public electrode and removes the first public electrode
The second public electrode in addition, display drive apparatus include:
Reference voltage obtains module, for obtaining the reference voltage of each public electrode based on pre-display grayscale；Benchmark electricity
Pressure is the corresponding display picture of the first public electrode under pre-display grayscale when flicker value minimum, and driving chip is to the first common electrical
The voltage of pole output；
Offset voltage determining module, for the driving current according to the second public electrode under pre-display grayscale, Yi Ji
Two public electrodes determine the offset voltage of the second public electrode with respect to the position distribution of the first public electrode；
Target common voltage determining module, after compensating its reference voltage using the offset voltage of the second public electrode
Voltage as target common voltage；And use the reference voltage of the first public electrode public as the target of the first public electrode
Common voltage.
The third aspect, the embodiment of the invention also provides a kind of display equipment, including display panel, display panel includes more
A public electrode and multiple pixel electrodes, public electrode include one first public electrode and in addition to the first public electrode
Two public electrodes；It further include driving chip, driving chip passes through signal wire respectively and is electrically connected with each public electrode one-to-one correspondence；It drives
The display drive apparatus of second aspect offer is provided in dynamic chip.
Display driving method provided in this embodiment, by the benchmark electricity for obtaining each public electrode based on pre-display grayscale
Pressure, and according to the driving current of the second public electrode under pre-display grayscale and the second public electrode with respect to the first public electrode
Position distribution determines the offset voltage of the second public electrode, and using the offset voltage standard of compensation voltage of the second public electrode it
Voltage afterwards is as target common voltage, and uses the reference voltage of the first public electrode as the target of the first public electrode
Common voltage realizes according to the corresponding display picture of the first public electrode under each grayscale driving chip when flicker value minimum
The positional relationship of the voltage and the second public electrode and the first public electrode that export to the first public electrode determines entire aobvious
Show the target common voltage in panel, so that can only be tested the first public electrode in panel when flashing test, simplifies
Testing procedure, and the voltage drop on the drive signal line that can be electrically connected to each public electrode compensates, and realizes root
According to the output electricity of the position adjustment driving chip of the grayscale and each public electrode of each public electrode next frame picture to be shown
Pressure ensure that the public electrode of the variant position corresponding display picture under different grayscale can realize that flicker value is minimum,
Reduce film flicker and ghost phenomena.
Detailed description of the invention
Fig. 1 is a kind of flow chart of display driving method provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention；
Fig. 3 is the flow chart of another display driving method provided in an embodiment of the present invention；
Fig. 4 is the timing diagram of the target common voltage of three the second public electrodes；
Fig. 5 is target common voltage of second public electrode when pre-display grayscale is respectively L1, L32 and L127
Timing diagram；
Fig. 6 is a kind of structural schematic diagram of display drive apparatus provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another display drive apparatus provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram for showing equipment provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of flow chart of display driving method provided in an embodiment of the present invention, and Fig. 2 is that the embodiment of the present invention provides
A kind of display panel structural schematic diagram, with reference to Fig. 1 and Fig. 2, the display driving method is for driving display panel, display surface
Plate includes multiple public electrodes and multiple pixel electrode (not shown)s, and public electrode includes one first public electrode, 10 He
The second public electrode in addition to the first public electrode 10, display driving method include:
Step S110, the reference voltage of each public electrode is obtained based on pre-display grayscale；Reference voltage is first public
The display picture of electrode 10 is under pre-display grayscale when flicker value minimum, electricity that driving chip 40 is exported to the first public electrode 10
Pressure；
For the display picture of specific one public electrode, the corresponding best common voltage of each grayscale, this is most
Good common voltage can make the flicker degree of the corresponding display picture of the public electrode minimum.It is existing that each public affairs are arranged by whole face
The best common voltage of common electrode is all the mode of corresponding best common voltage under a certain grayscale (such as under L127 grayscale), is made
Each public electrode is obtained when showing other grayscale, the voltage of each public electrode is not corresponding best common voltage under the grayscale,
And then the flashing for showing picture can be made to aggravate, make to show that more serious flashing and ghost phenomena occurs in picture.
In view of the above problems, display driving method provided in this embodiment, first according to the pre-display of each public electrode
Grayscale determines the reference voltage of each public electrode, wherein pre-display grayscale can be at the corresponding display picture of each public electrode
Next frame will show the grayscale of picture, i.e., to show that the grayscale of picture determines each common electrical according to each public electrode block next frame
The corresponding reference voltage of pole block, the reference voltage are that flicker value is most under pre-display grayscale for the display picture of the first public electrode 10
Hour, the voltage that driving chip 40 export to the first public electrode 10, the corresponding reference voltage difference of different grayscale can overcome
It is caused by the corresponding best common voltage of a certain grayscale that the best common voltage of each public electrode, which is arranged, in whole face in the prior art
Show film flicker problem.
Optionally, the first public electrode 10 is a preset public electrode.Such as it can be in advance to first public electrode
10 carry out the test of flicker experiment, test flicker value of the corresponding display picture of the first public electrode 10 under each grayscale,
The corresponding display picture voltage that driving chip 40 exports in each grayscale flicker value minimum of the first public electrode 10 is obtained, the
The corresponding display picture voltage that driving chip 40 exports when flicker value minimum under a certain grayscale of one public electrode 10 is determined as
The reference voltage of each public electrode block under the grayscale.
Step S120, according to the driving current of the second public electrode under pre-display grayscale and the second public electrode phase
The offset voltage of the second public electrode is determined to the position distribution of the first public electrode 10；
Illustratively, it is public positioned at what is do not gone together when each public electrode is arranged in array as shown in Figure 2 in display panel
The distance of electrode to driving chip 40 is different, connects the length of the signal wire for the public electrode and driving chip 40 that do not go together accordingly
Degree is different, and display panel is when showing picture, pixel electrode reception pixel voltage, public electrode reception common voltage, but by
In reasons such as the length differences for the signal wire connecting with each public electrode, driving chip 40 exists to the voltage that each public electrode exports
Different losses is had when transmitting in signal wire.
When display panel carries out picture display, usually cyclic drive need to be provided respectively for pixel electrode and public electrode
Voltage, within each period, including positive frame and negative frame, under positive frame condition, between pixel electrode and corresponding public electrode
Driving voltage difference is positive value, and under negative frame condition, the driving voltage difference between pixel electrode and corresponding public electrode is negative value.Its
In, positive frame and negative frame usually respectively account for half period.It is each in display device under positive frame and negative frame condition for ideal driving voltage
Driving voltage absolute value of the difference is equal between a position pixel electrode and public electrode, shows picture quality in such cases
It well, is not in film flicker and ghost phenomena.The reference voltage of each public electrode is according to the first public affairs in step S110
What the flashing test experiments of common electrode 10 determined, the signal wire length being connect with the second public pole that the first public electrode 10 is not gone together
It spends and different from the length of signal wire of the first public electrode 10 connection, the loss for the common voltage that driving chip 40 exports is not
Together, therefore, it is necessary to compensate to the common voltage that driving chip 40 is exported to the second public electrode.
Illustratively, the offset voltage of the second public electrode can be according to the second public electrode relative to the first public electrode
The driving current of 10 position and the second public electrode under pre-display grayscale is determined, such as can in driving chip 40
The length for the signal wire for connecting each second public electrode block and driving chip 40, and the first public electrode of connection is stored in advance
It can store the corresponding electricity of unit length signal wire in 10 pieces of length and driving chip 40 with the signal wire of driving chip 40
Resistance value, accordingly can the length of signal wire according to each second public electrode block to driving chip 40 arrived for 10 pieces with the first public electrode
The signal wire of driving chip 40 be the difference of length and the product of the corresponding resistance of unit length signal wire to obtain each second public
The offset voltage of electrode block.
Step S130, the voltage after using the offset voltage of the second public electrode to compensate its reference voltage is public as target
Common voltage；
Wherein, the target common voltage of each public electrode is driving chip 40 to the public electrode public affairs finally to be exported
Common voltage.The determination of the reference voltage of second public electrode determines that the offset voltage of second electrode is according to display picture grayscale
It is determined according to the position distribution relationship of the second public electrode and the first public electrode 10, uses the offset voltage of the second public electrode
For voltage after standard of compensation voltage as target common voltage, which has comprehensively considered the second public electrode pair
The 10 position difference bring voltage loss of grayscale and the second public electrode and the first public electrode for the display picture answered, makes
Each public electrode is obtained under target common voltage, corresponding flicker value can reach minimum, be conducive to mitigate and eliminate aobvious
The flashing of showing device and ghost phenomena.
Step S140, use the reference voltage of the first public electrode 10 as the target common electrical of the first public electrode 10
Pressure.
Because the display picture that reference voltage is the first public electrode 10 when flicker value minimum, drives core under pre-display grayscale
The problem of voltage that piece 40 is exported to the first public electrode 10, the positional relationship with itself is not present in the first public electrode 10, therefore
It can be using the reference voltage as the target common voltage of the first public electrode 10.
Display driving method provided in this embodiment, by the benchmark electricity for obtaining each public electrode based on pre-display grayscale
Pressure, and according to the driving current of the second public electrode under pre-display grayscale and the second public electrode with respect to the first public electrode
Position distribution determines the offset voltage of the second public electrode, and using the offset voltage standard of compensation voltage of the second public electrode it
Voltage afterwards is as target common voltage, and uses the reference voltage of the first public electrode as the target of the first public electrode
Common voltage, and then realize according to the display picture of the first public electrode under each grayscale driving chip when flicker value minimum
The positional relationship of the voltage and the second public electrode and the first public electrode that export to the first public electrode determines entire aobvious
Show the target common voltage in panel, so that can only be tested the first public electrode in panel when flashing test, simplifies
Testing procedure, and the voltage drop on the drive signal line that can be electrically connected to each public electrode compensates, and realizes root
According to the output electricity of the position adjustment driving chip of the grayscale and each public electrode of each public electrode next frame picture to be shown
Pressure ensure that the display picture of the public electrode of variant position can realize that flashing is minimum under different grayscale, reduce picture
Face flashing and ghost phenomena.
On the basis of above scheme, the embodiment of the invention provides another display driving method, Fig. 3 is of the invention real
The flow chart of another display driving method of example offer is applied, referring to figs. 2 and 3, which includes:
Step S110, the reference voltage of each public electrode is obtained based on pre-display grayscale；Reference voltage is first public
The display picture of electrode 10 is under pre-display grayscale when flicker value minimum, electricity that driving chip 40 is exported to the first public electrode 10
Pressure；
Optionally, above-mentioned steps S120 is specifically included:
Step S121, the offset voltage of the second public electrode is determined using following formula；
Wherein, U' is the offset voltage of the second public electrode；I is the driving electricity of the second public electrode under pre-display grayscale
Stream；L is signal line length and the difference for the signal line length for being electrically connected the first public electrode 10 for being electrically connected the second public electrode；
ρ is the resistivity of signal wire；S is the sectional area of signal wire.
For example, for the second public electrode 11, the second public electrode 21 and the second public electrode 31 in Fig. 2, it is false
If the corresponding pre-display picture grayscale of three public electrodes is identical, but because with the signal wire of each public electrode being electrically connected and with
The difference of the length of the signal wire of one public electrode electrical connection is different, and offset voltage is also different.
For ease of calculation, the signal wire being electrically connected in display panel with each public electrode is chosen as same signal line.Example
Such as, for the second public electrode 22, the length for the signal wire being connected electrically is d1, the signal being electrically connected with the first public electrode
Line length is d2, then the corresponding offset voltage of the second public electrode 22 are as follows:
Using above-mentioned formula calculate the second public electrode offset voltage, only need to be stored in advance in driving chip 40 with respectively
The signal line length of second public electrode electrical connection and and the difference of the length of signal wire that is electrically connected of the first public electrode 10, and
Driving current of each second public electrode under each display grayscale, only tests the first public electrode 10 when flashing test
Can, simplify testing procedure and test process, and can realize the voltage compensation to each second public electrode, mitigate and eliminate flashing and
Ghost phenomena.
Optionally, before the reference voltage for obtaining each public electrode based on pre-display grayscale, further includes:
Step S101, grayscale test is carried out to the first public electrode 10, obtains the first public electrode 10 under different grayscale
Display picture flicker value；
Illustratively, it when carrying out grayscale test to the first public electrode 10, can be exported to the first public electrode 10 multiple
The grayscale of different voltage, the corresponding display picture of the first public electrode 10 is sent out with the difference of 40 output voltage of driving chip
Changing, each grayscale correspond to certain voltage range.Driving chip 40 can obtain the corresponding display of the first public electrode 10
The grayscale of picture, and the flicker value of display picture.
Step S102, voltage when display film flicker value minimum that the first public electrode 10 under each grayscale is corresponding determines
For the reference voltage under the grayscale；
And it when by the first public electrode 10 correspondence display film flicker value minimum, flows through and is electrically connected with the first public electrode 10
The electric current of the signal wire connect is determined as the driving current under the grayscale.
For example, first is public when 40 output voltage of driving chip is U1271, U1272, U1273, U1274 and U1275
The grayscale of the corresponding display picture of electrode 10 is all L127 grayscale, and when 40 output voltage of driving chip is U1273, shows picture
Flicker value it is minimum, then the reference voltage that U1273 can be determined as under L127 grayscale, and be by 40 output voltage of driving chip
Corresponding driving current is determined as the driving current under L127 grayscale when U1273, and by the reference voltage, driving current and display
The corresponding relationship of picture grayscale is stored in driving chip 40.After then testing the first public electrode 10, driving chip 40
In be stored in corresponding reference voltage under each grayscale, such as the pre-display grayscale of display picture includes L1, L2 ... L255, each pre-
The corresponding reference voltage of display grayscale is respectively U1, U2 ... U255 and the corresponding driving current I1 of each pre-display grayscale,
I2……I255。
Optionally, above-mentioned steps S130 compensates the voltage after its reference voltage using the offset voltage of the second public electrode
As target common voltage, comprising:
It step S131, will be the reference voltage of the second public electrode offset voltage corresponding with second public electrode and true
It is set to the target common voltage of second public electrode.
Illustratively, public for the second of the first public electrode 10 and same column and lastrow for display panel shown in Fig. 2
Common electrode 22, it is assumed that the pre-display grayscale of second public electrode is L127 grayscale, then its corresponding reference voltage is U127,
Corresponding driving current be I127, be electrically connected the second public electrode 22 signal line length be electrically connected the first public electrode 10
The difference of signal line length can obtain the second public electrode then according to the offset voltage calculation formula in step 121 for (d2-d1)
When 22 corresponding display pictures are L127 grayscale, corresponding target common voltage are as follows:
Wherein, U '127For target common voltage of second public electrode 22 under L127 grayscale, U127For the second public electrode
The 22 benchmark common voltage under L127 grayscale, I127For driving current of second public electrode 22 under L127 grayscale, U "127For
Offset voltage of second public electrode 22 under L127 grayscale.
It is not difficult to find out that for the signal line length that is connect with the second public electrode than the letter that is connect with the first public electrode 10
The length of number line is long, is electrically connected the signal line length of the second public electrode and the signal wire length that is electrically connected the first public electrode 10
The difference l of degree is positive value；For the signal line length that is connect with the second public electrode than the letter that is connect with the first public electrode 10
The length of number line is short, is electrically connected the signal line length of the second public electrode and the signal wire length for being electrically connected the first public electrode 10
The difference l of degree is negative value.
Still it is illustrated with the second public electrode 11, the second public electrode 21 and the second public electrode 31 in Fig. 2, it is false
If the corresponding pre-display picture grayscale of three public electrodes is identical, but because with the signal wire of each public electrode being electrically connected and with
The difference of the length of the signal wire of one public electrode electrical connection is different, and offset voltage is also different, finally obtained target common electrical
Pressure is also just different, and Fig. 4 is the timing diagram of the target common voltage of three the second public electrodes, wherein the second public electrode 11 is corresponding
Target common voltage be the corresponding timing of COM11, the corresponding target common voltage of the second public electrode 21 be COM21 it is corresponding
Timing, in the corresponding target common voltage of the second public electrode 31 be the corresponding timing of COM31, the second public electrode 11, second
Public electrode 21 and the corresponding target common voltage of the second public electrode 31 can refer to Fig. 4.
In addition, for second public electrode, in its pre-display grayscale difference, corresponding target common voltage
Also different, for example, by taking the second public electrode 11 as an example, when pre-display grayscale is respectively L1, L32 and L127, corresponding benchmark electricity
Pressure is respectively U1, U32 and U127, in addition because the driving current under different pre-display grayscale is different, corresponding offset voltage
Also different, finally make its target common voltage different, it in pre-display grayscale is respectively L1 that Fig. 5, which is second public electrode,
The timing diagram of target common voltage when L32 and L127, with reference to Fig. 5, wherein it is respectively L1 ash that the t1 stage, which corresponds to pre-display grayscale,
11 target common voltage of the second public electrode when rank, t2 stage correspond to the second public affairs when pre-display grayscale is respectively L32 grayscale
11 target common voltage of common electrode, t3 stage correspond to 11 target of the second public electrode when pre-display grayscale is respectively L127 grayscale
Common voltage.
Optionally, the first public electrode 10 is the public electrode of display panel intermediate region.
The public electrode of intermediate region can be positioned at center row and be located at the public electrode of middle column, such as Fig. 2
Shown display panel, the public electrode that appended drawing reference 10 and 33 indicates can all be predetermined to be the first public electrode, and the present embodiment is only
It is to be schematically illustrated with the first public electrode for 10.The public electrode of intermediate region is chosen as the first public electrode,
So that the second public electrode number of two sides is roughly the same above and below the first public electrode, the signal being electrically connected with the second public electrode
The length of line and and the first public electrode 10 electrical connection equal two the second public electrodes of row up and down of the difference of signal line length
Offset voltage is opposite number, under same gray level, only calculates the offset voltage of the second public electrode of 10 side of the first public electrode,
The other side is directly corresponding to take opposite number, reduces calculation amount, improves display effect.
Optionally, the display driving method further include:
In the display stage, each target common voltage is exported to corresponding each public electrode；
In the touch-control stage, touch drive signal is exported to each public electrode.
Display panel is displayed for and touch-control, shows the stage, can position according to each public electrode and pre-display
Grayscale, export each target common voltage to corresponding each public electrode, make the display picture of each display panel everywhere
Flicker value is minimum, makes display effect more preferably.Touch-control stage, output pulse signal to each public electrode, to realize to display surface
The touch-control of plate.
Display driving method provided in this embodiment, by carrying out grayscale test to the first public electrode, by each grayscale
Voltage when the corresponding display film flicker value minimum of lower first public electrode is determined as the reference voltage under the grayscale, and by the
When one public electrode corresponds to display film flicker value minimum, the electric current for flowing through the signal wire being electrically connected with the first public electrode is determined
For the driving current under the grayscale, and the offset voltage of each second public electrode is calculated according to formula, so that flashing test
When only need to the first public electrode carry out grayscale test, without to each second public electrode test, simplify test process and
Testing procedure, and the grayscale adjustment target common voltage that picture is shown according to each public electrode is realized, and according to each public affairs
The position of common electrode adjusts target common voltage, so that the public electrode at different location is all up under any grayscale
Flashing is minimum, is conducive to mitigate and eliminate flashing and ghost phenomena, improves display effect.
The embodiment of the invention also provides a kind of display drive apparatus, Fig. 6 is display driving provided in an embodiment of the present invention
The structural schematic diagram of device, with reference to Fig. 6, the display drive apparatus, for driving display panel, display panel includes multiple public
Electrode and multiple pixel electrodes, public electrode include one first public electrode and second public in addition to the first public electrode
Electrode, display drive apparatus include:
Reference voltage obtains module 210, for obtaining the reference voltage of each public electrode based on pre-display grayscale；Benchmark
Voltage is the display picture of the first public electrode under pre-display grayscale when flicker value minimum, and driving chip is to the first public electrode
The voltage of output；
Offset voltage determining module 220, for the driving current according to the second public electrode under pre-display grayscale, and
Second public electrode determines the offset voltage of the second public electrode with respect to the position distribution of the first public electrode；
Target common voltage determining module 230, for compensating its reference voltage using the offset voltage of the second public electrode
Voltage later is as target common voltage；And use the reference voltage of the first public electrode as the mesh of the first public electrode
Mark common voltage.
It is each based on the acquisition of pre-display grayscale to obtain module by reference voltage for display drive apparatus provided in this embodiment
The reference voltage of public electrode, offset voltage determining module according to the driving current of the second public electrode under pre-display grayscale and
Second public electrode determines the offset voltage of the second public electrode, target common voltage with respect to the position distribution of the first public electrode
Determining module uses the voltage after the offset voltage standard of compensation voltage of the second public electrode as target common voltage, and
Use the reference voltage of the first public electrode as the target common voltage of the first public electrode, and then realizes according to the first public affairs
The display picture voltage that driving chip is exported to the first public electrode when flicker value minimum under each grayscale of common electrode, and
The positional relationship of second public electrode and the first public electrode determines the target common voltage in entire display panel, so that dodging
Only the first public electrode in panel can be tested when bright test, simplify testing procedure, and can be to each public electrode
Voltage drop on the drive signal line of electrical connection compensates, and realizes according to each public electrode next frame picture to be shown
Grayscale and each public electrode position adjustment driving chip output voltage, ensure that the public electrode of variant position
Display picture can realize that flashing is minimum under different grayscale, reduce film flicker and ghost phenomena.
On the basis of above scheme, the embodiment of the invention also provides another display drive apparatus, Fig. 7 is the present invention
The structural schematic diagram for another display drive apparatus that embodiment provides,
Optionally, offset voltage determining module 220 determines the offset voltage of the second public electrode using following formula；
Wherein, U' is the offset voltage of the second public electrode；I is the driving electricity of the second public electrode under pre-display grayscale
Stream；L is signal line length and the difference for the signal line length for being electrically connected the first public electrode for being electrically connected the second public electrode；ρ
For the resistivity of signal wire；S is the sectional area of signal wire.
With reference to Fig. 7, which further includes that flicker value obtains module 201, for obtaining based on pre-display grayscale
Before the reference voltage for taking each public electrode, grayscale test is carried out to the first public electrode, obtains the first public electrode not
With the flicker value of the display picture under grayscale；
Reference voltage determining module 202, for the first public electrode under each grayscale to be corresponded to display film flicker value most
The voltage of hour is determined as the reference voltage under the grayscale；
Driving current determining module 203, when for display film flicker value minimum that the first public electrode is corresponding, flow through with
The electric current of the signal wire of first public electrode electrical connection is determined as the driving current under the grayscale.
Optionally, target common voltage determining module 230 be specifically used for by the reference voltage of the second public electrode and this
The sum of the corresponding offset voltage of two public electrodes is determined as the target common voltage of second public electrode.
With continued reference to Fig. 7, the display drive apparatus further include:
First output module 240, for exporting each target common voltage to corresponding each common electrical in the display stage
Pole；
Second output module 250, for exporting touch drive signal to each public electrode in the touch-control stage.
Display drive apparatus provided in this embodiment obtains module by flicker value and carries out grayscale survey to the first public electrode
Examination, voltage when the first public electrode under each grayscale is corresponded to display film flicker value minimum by reference voltage determining module determine
For under the grayscale reference voltage and driving current determining module the corresponding display film flicker value of the first public electrode is minimum
When, the electric current for flowing through the signal wire being electrically connected with the first public electrode is determined as driving current under the grayscale, and according to public affairs
Formula calculates the offset voltage of each second public electrode, so that only grayscale test need to be carried out to the first public electrode when flashing test
, without testing each second public electrode, simplify test process and testing procedure, and realize and want according to each public electrode
It shows that the grayscale of picture adjusts target common voltage, and target common voltage is adjusted according to the position of each public electrode, in turn
So that be all up flashing under any grayscale minimum for the public electrode at different location, be conducive to mitigate and eliminate flashing and residual
Shadow phenomenon improves display effect.
The embodiment of the invention also provides a kind of display equipment, Fig. 8 is a kind of display equipment provided in an embodiment of the present invention
Structural schematic diagram.With reference to Fig. 8, which includes display panel, and display panel includes multiple public electrodes and more
A pixel electrode, public electrode include one first public electrode and the second public electrode in addition to the first public electrode；Also wrap
Driving chip is included, driving chip passes through signal wire respectively and is electrically connected with each public electrode one-to-one correspondence；It is integrated in driving chip
The display drive apparatus that the above-mentioned any embodiment of the present invention provides.
Display equipment provided in this embodiment, by obtaining the reference voltage of each public electrode based on pre-display grayscale,
And according to the driving current of the second public electrode under pre-display grayscale and the position of opposite first public electrode of the second public electrode
The offset voltage for being distributed the second public electrode of determination is set, and after the offset voltage standard of compensation voltage of the second public electrode of use
Voltage as target common voltage, and use the reference voltage of the first public electrode public as the target of the first public electrode
Common voltage, so realize according to the display picture of the first public electrode under each grayscale when flicker value minimum driving chip to
The voltage of first public electrode output and the positional relationship of the second public electrode and the first public electrode, determine entire display
Target common voltage in panel simplifies and surveys so that can only test the first public electrode in panel when flashing test
Try is rapid, and the voltage drop on the drive signal line that can be electrically connected to each public electrode compensates, and realizes basis
The output voltage of the position adjustment driving chip of the grayscale and each public electrode of each public electrode next frame picture to be shown,
It ensure that the display picture of the public electrode of variant position can realize that flashing is minimum under different grayscale, reduce picture and dodge
Bright and ghost phenomena.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (12)
1. a kind of display driving method, which is characterized in that for driving display panel, the display panel includes multiple common electricals
Pole and multiple pixel electrodes, the public electrode include one first public electrode and in addition to first public electrode
Two public electrodes, the display driving method include:
The reference voltage of each public electrode is obtained based on pre-display grayscale；The reference voltage is the first public electrode pair
The display picture answered is under the pre-display grayscale when flicker value minimum, electricity that driving chip is exported to first public electrode
Pressure；
It is opposite according to the driving current of second public electrode under the pre-display grayscale and second public electrode
The position distribution of first public electrode determines the offset voltage of second public electrode；
Voltage after using the offset voltage of second public electrode to compensate its reference voltage is as target common voltage；
Use the reference voltage of first public electrode as the target common voltage of first public electrode.
2. display driving method according to claim 1, which is characterized in that determine that described second is public using following formula
The offset voltage of electrode；
Wherein, U' is the offset voltage of second public electrode；I is the drive of second public electrode under pre-display grayscale
Streaming current；L is to be electrically connected the signal line length of second public electrode and the signal wire for being electrically connected first public electrode
The difference of length；ρ is the resistivity of the signal wire；S is the sectional area of the signal wire.
3. display driving method according to claim 1, which is characterized in that described each being obtained based on pre-display grayscale
Before the reference voltage of the public electrode, further includes:
Grayscale test is carried out to first public electrode, obtains display picture of first public electrode under different grayscale
Flicker value；
Voltage when display film flicker value minimum that the first public electrode described under each grayscale is corresponding is determined as under the grayscale
Reference voltage；
And it when by first public electrode correspondence display film flicker value minimum, flows through and is electrically connected with first public electrode
The electric current of the signal wire connect is determined as the driving current under the grayscale.
4. display driving method according to claim 1, which is characterized in that the benefit using second public electrode
The voltage after its reference voltage of voltage compensation is repaid as target common voltage, comprising:
The sum of the reference voltage of second public electrode offset voltage corresponding with second public electrode is determined as
The target common voltage of second public electrode.
5. display driving method according to claim 1, which is characterized in that first public electrode is in display panel
Between region the public electrode.
6. display driving method according to claim 1, which is characterized in that further include:
In the display stage, each target common voltage is exported to corresponding each public electrode；
In the touch-control stage, touch drive signal is exported to each public electrode.
7. a kind of display drive apparatus, which is characterized in that for driving display panel, the display panel includes multiple common electricals
Pole and multiple pixel electrodes, the public electrode include one first public electrode and in addition to first public electrode
Two public electrodes, the display drive apparatus include:
Reference voltage obtains module, for obtaining the reference voltage of each public electrode based on pre-display grayscale；The base
Quasi- voltage is the corresponding display picture of the first public electrode under the pre-display grayscale when flicker value minimum, and driving chip is to institute
State the voltage of the first public electrode output；
Offset voltage determining module, for the driving current according to second public electrode under the pre-display grayscale, with
And the position distribution of relatively described first public electrode of second public electrode determines the compensation electricity of second public electrode
Pressure；
Target common voltage determining module, after compensating its reference voltage using the offset voltage of second public electrode
Voltage as target common voltage；And use the reference voltage of first public electrode as first public electrode
Target common voltage.
8. display drive apparatus according to claim 7, which is characterized in that the offset voltage determining module is using as follows
Formula determines the offset voltage of second public electrode；
Wherein, U' is the offset voltage of second public electrode；I is the drive of second public electrode under pre-display grayscale
Streaming current；L is to be electrically connected the signal line length of second public electrode and the signal wire for being electrically connected first public electrode
The difference of length；ρ is the resistivity of the signal wire；S is the sectional area of the signal wire.
9. display drive apparatus according to claim 7, which is characterized in that further include that flicker value obtains module, be used for
Before the reference voltage for obtaining each public electrode based on pre-display grayscale, ash is carried out to first public electrode
Rank test obtains the flicker value of display picture of first public electrode under different grayscale；
Reference voltage determining module, when for display film flicker value minimum that the first public electrode described under each grayscale is corresponding
Voltage be determined as the reference voltage under the grayscale；
Driving current determining module, for will first public electrode is corresponding show film flicker value minimum when, flow through and institute
The electric current for stating the signal wire of the first public electrode electrical connection is determined as driving current under the grayscale.
10. display drive apparatus according to claim 7, which is characterized in that the target common voltage determining module tool
Body is used for by the reference voltage of second public electrode offset voltage corresponding with second public electrode and determines
For the target common voltage of second public electrode.
11. display drive apparatus according to claim 7, which is characterized in that further include:
First output module, for exporting each target common voltage to corresponding each public electrode in the display stage；
Second output module, for exporting touch drive signal to each public electrode in the touch-control stage.
12. a kind of display equipment, which is characterized in that including display panel, the display panel include multiple public electrodes and
Multiple pixel electrodes, the public electrode include one first public electrode and second public in addition to first public electrode
Electrode；It further include driving chip, the driving chip passes through signal wire respectively and is electrically connected with each public electrode one-to-one correspondence；
The display drive apparatus of any one of claim 7-11 offer is provided in the driving chip.
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Application publication date: 20181218 |