CN109064968A - A kind of driving method of active driving quantum dot display panel - Google Patents
A kind of driving method of active driving quantum dot display panel Download PDFInfo
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- CN109064968A CN109064968A CN201710370257.XA CN201710370257A CN109064968A CN 109064968 A CN109064968 A CN 109064968A CN 201710370257 A CN201710370257 A CN 201710370257A CN 109064968 A CN109064968 A CN 109064968A
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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]
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Abstract
The present invention discloses a kind of driving method of active driving quantum dot display panel, it include: that each pixel is equipped with the thin film transistor (TFT) with switching function, when the corresponding thin film transistor (TFT) switching of any pixel point is in off state, an excitation source signal being driven in the reverse direction is added in the driving circuit；When the excitation source signal is excited, a reverse drive signals are applied to the pixel, to eliminate the charge being limited in the pixel；The potential barrier that defect potential well is changed by applying the reverse drive signals, the charge for eliminating limitation and being gathered in potential well reduce the density of limitation charge, to extend the service life of active driving quantum dot display panel and improve its display brightness.
Description
Technical field
The present invention relates to display panel fields, more particularly to a kind of driving side of active driving quantum dot display panel
Method.
Background technique
The service life of QLED be always restrict its widely applied bottleneck, in addition to the optimization to material, device, preparation process with
Outside, driving QLED is also a kind of method that can slow down QLED light intensity attenuation, enhance QLED service life；
QLED is usually by first electrode, hole transmission layer, quantum dot light emitting layer, electron transfer layer and second electrode structure
At；Since every layer of energy level is different, that is, existing can be very poor, and in the QLED course of work, charge can be gathered in boundary that can be very poor
Face, the interface especially contacted with quantum dot light emitting layer can significantly influence the characteristics of luminescence of quantum dot, to reduce
The reason of luminous intensity, these defects are also limiting carrier.As the working time of QLED increases, more and more charge limits
It makes into interface, as the center of photon is quenched, to significantly reduce luminous intensity, also shorten QLED uses the longevity
Life；
During driving active driving quantum dot display panel, since the long-time of charge is gathered in quantum dot boundary layer
In, to affect the service life and luminous intensity of active driving quantum dot display panel.
Therefore, above-mentioned technology has yet to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of active driving quantum dot display surfaces
The driving method of plate, it is intended to solve existing active driving quantum dot display panel service life is short and luminous intensity compared with
Low problem.
Technical scheme is as follows:
A kind of driving method of active driving quantum dot display panel, wherein include:
A, each pixel is equipped with the thin film transistor (TFT) with switching function, when the corresponding thin film transistor (TFT) of any pixel point is cut
When being changed to closed state, an excitation source signal being driven in the reverse direction is added in the driving circuit；
B, when the excitation source signal is excited, a reverse drive signals are applied to the pixel, are limited in institute to eliminate
State the charge in pixel.
The driving method of the active driving quantum dot display panel, wherein the reverse drive signals are reversed
Voltage, reverse current or backward voltage and reverse current are used alternatingly.
The driving method of the active driving quantum dot display panel, wherein the waveform of the backward voltage is side
At least one of wave, triangular wave, oblique wave or sine wave.
The driving method of the active driving quantum dot display panel, wherein the waveform of the reverse current is side
At least one of wave, triangular wave, oblique wave or sine wave.
The driving method of the active driving quantum dot display panel, wherein the backward voltage is less than active
Drive the breakdown voltage of quantum dot display panel.
The driving method of the active driving quantum dot display panel, wherein the reverse current is less than active
Drive the breakdown current of quantum dot display panel.
The driving method of the active driving quantum dot display panel, wherein the time of the backward voltage accounts for week
The percentage of phase is 1%-99%, and the frequency of the backward voltage is not less than 60HZ, the amplitude of the backward voltage be -0.1V ~ -
10V。
The driving method of the active driving quantum dot display panel, wherein the time of the reverse current accounts for week
The percentage of phase is 1%-99%, and the frequency of the reverse current is not less than 60HZ, the amplitude of the reverse current is-
0.0001Am/cm-2~-1Am/cm-2。
The driving method of the active driving quantum dot display panel, wherein the reverse drive signals are reversed
When voltage and reverse current are used alternatingly, the frequency of the backward voltage is not less than 60HZ, and the amplitude of the backward voltage is-
0.1V~-10V；The frequency of the reverse current is not less than 60HZ, and the amplitude of the reverse current is -0.0001Am/cm-2~-
1Am/cm-2；The time of percentage and reverse current that the time of the backward voltage accounts for the period accounts for the sum of the percentage in period and is
1%~99%。
The driving method of the active driving quantum dot display panel, wherein set among the reverse drive signals
It is equipped with vacant driving signal.
The utility model has the advantages that the present invention provides a kind of driving methods of active driving quantum dot display panel, comprising: each
Pixel is equipped with the thin film transistor (TFT) with switching function, when the corresponding thin film transistor (TFT) of any pixel point is switched to closing shape
When state, an excitation source signal being driven in the reverse direction is added in the driving circuit；When the excitation source signal is excited, to the picture
Vegetarian refreshments applies a reverse drive signals, to eliminate the charge being limited in the pixel；By being driven in the reverse direction letter described in application
The potential barrier for number changing defect potential well, the charge for eliminating limitation and being gathered in potential well reduce the density of limitation charge, from
And it extends the service life of active driving quantum dot display panel and improves its display brightness.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the driving method preferred embodiment of active driving quantum dot display panel of the present invention.
Fig. 2 is the driving signal schematic diagram of the active driving quantum dot display panel of the active driving of the present invention.
Fig. 3 is that the effect that the active driving quantum dot display panel of the active driving of the present invention applies reverse drive signals is shown
It is intended to.
Fig. 4 is the waveform diagram of driving signal in the embodiment of the present invention 1.
Fig. 5 be the embodiment of the present invention 1 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Fig. 6 is the waveform diagram of driving signal in the embodiment of the present invention 2.
Fig. 7 be the embodiment of the present invention 2 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Fig. 8 is the waveform diagram of driving signal in the embodiment of the present invention 3.
Fig. 9 be the embodiment of the present invention 3 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 10 is the waveform diagram of driving signal in the embodiment of the present invention 4.
Figure 11 be the embodiment of the present invention 4 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 12 is the waveform diagram of driving signal in the embodiment of the present invention 5.
Figure 13 be the embodiment of the present invention 5 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 14 is the waveform diagram of driving signal in the embodiment of the present invention 6.
Figure 15 be the embodiment of the present invention 6 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 16 is the waveform diagram of driving signal in the embodiment of the present invention 7.
Figure 17 be the embodiment of the present invention 7 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 18 is the waveform diagram of driving signal in the embodiment of the present invention 8.
Figure 19 be the embodiment of the present invention 8 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 20 is the waveform diagram of driving signal in the embodiment of the present invention 9.
Figure 21 be the embodiment of the present invention 9 in using reverse drive signals driving active driving quantum dot display panel with
The life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Figure 22 is the waveform diagram of driving signal in the embodiment of the present invention 10.
Figure 23 is in the embodiment of the present invention 10 using the active driving quantum dot display panel of reverse drive signals driving
With the life time decay curve comparison figure of the active driving quantum dot display panel of normal driving.
Specific embodiment
The present invention provides a kind of driving method of active driving quantum dot display panel, to make the purpose of the present invention, skill
Art scheme and effect are clearer, clear, and the present invention is described in more detail below.It should be appreciated that tool described herein
Body embodiment is only used to explain the present invention, is not intended to limit the present invention.
The driving method of the active driving quantum dot display panel of one kind provided by the present invention, wherein as shown in Figure 1,
Comprising steps of
S100, each pixel are equipped with the thin film transistor (TFT) with switching function, when the corresponding film crystal of any pixel point
When pipe switching is in off state, an excitation source signal being driven in the reverse direction is added in the driving circuit；
S200, when the excitation source signal is excited, to the pixel apply a reverse drive signals, with eliminate be limited in
Charge in the pixel.
Specifically, the driving method of the active driving quantum dot display panel is divided into active driving (active matrix driving)
(passive drive) is driven with passive type；Wherein, active matrix driving belongs to static drive mode, has storage effect, can carry out 100%
Load driving, this driving are not limited by scan electrode number, can independently carry out selective control to each pixel.
In practical application, each pixel in the active active driving quantum dot display panel of driving is equipped with tool
There is a thin film transistor (TFT) of switching function, and each pixel is equipped with a charge storage capacitance, peripheral drive circuit and aobvious
Show that array whole system is integrated on same glass substrate.
The thin film transistor (TFT) has on-off action can be by film when the thin film transistor (TFT) receives scanning signal
Transistors switch is to open or close state；As shown in Fig. 2, triggering institute when the thin film transistor (TFT) is switched to open state
Data signal is stated, so that the pixel that driving is connect with the thin film transistor (TFT) is lighted；When the thin film transistor (TFT) is switched to pass
When closed state, the Data signal interruption, i.e., the described pixel is non-lit up.
Then, when the pixel is non-lit up, an excitation source signal being driven in the reverse direction is added in the driving circuit, works as institute
When stating excitation source signal and being excited, a reverse drive signals are applied to the pixel, are limited in pixel to eliminate
Charge.When thin film transistor (TFT) switching is in off state, pixel is in non-lit up state.Due to active drive quantum
Point display panel at work, sometimes not all pixel is all working, as long as the present invention detect it is wherein any one
A pixel is non-lit up, as long as that is, there is the thin film transistor (TFT) of 1 pixel not work, the present invention applies reversed drive to it
Dynamic signal, to eliminate the charge being limited in pixel, extend active driving quantum dot display panel uses the longevity
It orders and improves its display brightness.
As shown in Fig. 2, adding a driving source letter being driven in the reverse direction in the driving circuit when the pixel is non-lit up
Number, the starting point of the excitation source signal is triggered after Data signal interruption, i.e., the described excitation source signal is in pixel
It is triggered in the case that point is non-lit up；When the excitation source signal is excited, then one is applied to the pixel and be driven in the reverse direction
Signal, to eliminate the charge being limited in the pixel；
Further, as shown in Fig. 2, the reverse drive signals applied to pixel will not always exist, specifically, swash when described
When encouraging source signal and being excited again, the reverse drive signals stop.
Preferably, as shown in figure 3, being when the reverse drive signals are backward voltage, and when backward voltage duty ratio
When 5%, test to have obtained the data of the life-span upgrading of active driving quantum dot display panel by different backward voltage values,
Compared to no active driving quantum dot display panel for applying backward voltage, driving method of the invention can make active drive
The service life of dynamic quantum dot display panel promotes 10-30%.
Further, in the present invention, the reverse drive signals are backward voltage, reverse current or backward voltage and reversed
Electric current one of is used alternatingly.
Specifically, when the pixel in active driving quantum dot display panel is non-lit up, apply to the pixel
One backward voltage, reverse current or the backward voltage and reverse current being alternately present；
When the reverse drive signals of application are backward voltage, the pixel is under certain reversed electric field, in reversed electricity
Off field, it is gathered in the charge near interface and can be reversed electric field and drive to outside device, it, can by adjusting the intensity of reversed electric field
The potential barrier for changing defect potential well, escapes the charge being limited in potential well, to reduce the density of limitation charge, the reversed electricity
Time of pressure, frequency and amplitude are adjustable, to reach optimal charge eradicating efficacy；Preferably, described be driven in the reverse direction
Voltage is less than the breakdown voltage of active driving quantum dot display panel.
When the reverse drive signals of application are reverse current, the reverse current can inject certain electronics to pixel
And hole, so that the carrier for the anti-type being limited in pixel is neutralized, to reduce the density of limitation charge；It is described reversed
Time of electric current, frequency and amplitude are adjustable, to reach optimal charge eradicating efficacy；Preferably, the reversed electricity
Stream is less than the breakdown current of the active driving quantum dot display panel.
Further, in the present invention, the waveform of the backward voltage is in square wave, triangular wave, oblique wave or sine wave
It is at least one；The waveform of the reverse current can be equally at least one of square wave, triangular wave, oblique wave or sine wave.
It does below by the driving method of specific embodiment driving quantum dot display panel active to described one kind into one
The explanation of step:
Embodiment 1
When the reverse drive signals are square wave backward voltage, as shown in figure 4, the backward voltage and then positive driving
Signal, the backward voltage are less than the breakdown voltage of active driving quantum dot display panel, reverse drive signals and just
A drive cycle is formed to driving signal, the percentage r that the time of the backward voltage accounts for the period is 1%-99%, backward voltage
Frequency f be not less than 60HZ, the amplitude Vre of the backward voltage is -0.1V ~ -10V, when it is implemented, can be according to the actual situation
Suitable percentage, frequency and amplitude in range of choice, with the promotion effect being optimal；
Specifically, when the frequency f of the backward voltage is 60Hz, the percentage r that the time of backward voltage accounts for the period is 50%, instead
It is -3V to the amplitude Vre of voltage, as shown in figure 5, the reality of the active driving quantum dot display panel using backward voltage driving
Border life time decay curve is longer than the life time decay curve for not applying backward voltage, and attenuation degree obviously slows down.
Embodiment 2
When the reverse drive signals are square wave backward voltage, as shown in fig. 6, there are vacant among the reverse drive signals
Driving signal, i.e., the described backward voltage followed by forward driving signal or the followed by described vacant driving signal；Specifically, described
Reverse drive signals, forward driving signal and vacant driving signal form a drive cycle, followed by forward driving signal
The percentage that the time of backward voltage accounts for the period is ra, and the time of the backward voltage of followed by vacant driving signal accounts for the hundred of the period
Divide than being rb, the percentage that the time of vacant driving signal accounts for the period is r0, and the time of reverse drive signals accounts for the percentage in period
Be 1%-99% than ra+rb, the frequency f of the backward voltage is not less than 60HZ, the amplitude Vre of the backward voltage be -0.1V ~ -
10V, when it is implemented, suitable percentage, frequency and amplitude that can according to the actual situation in range of choice, with what is be optimal
Promote effect；
It specifically, is 100Hz when the frequency of the backward voltage is f, followed by time of the backward voltage of forward driving signal
The percentage ra for accounting for the period is 0%, and the percentage rb that the time of the backward voltage of followed by vacant driving signal accounts for the period is 20%,
The percentage r0 that the time of vacant driving signal accounts for the period is 15%, and the amplitude Vre of backward voltage is -3V, as shown in fig. 7, using
The actual life attenuation curve of the active driving quantum dot display panel of backward voltage driving, which is longer than, does not apply backward voltage
Life time decay curve, attenuation degree obviously slows down.
Embodiment 3
When the reverse drive signals are square wave reverse current, as shown in figure 8, the reverse current and then positive driving
Signal, the reverse current are less than the breakdown current of active driving quantum dot display panel；The reverse drive signals with just
A drive cycle is formed to driving signal, the percentage r that the time of the reverse current accounts for the period is 1%-99%, described reversed
The frequency f of electric current is not less than 60HZ, and the amplitude Ire of the reverse current is -0.0001Am/cm-2~-1Am/cm-2, specific implementation
When, suitable percentage, frequency and amplitude that can according to the actual situation in range of choice, with the promotion effect being optimal；
It specifically, is 60Hz when the frequency of the reverse current is f, the percentage r that the time of reverse current accounts for the period is 50%,
The amplitude Ire of reverse current is -0.001Am/cm-2, as shown in figure 9, aobvious using the active driving quantum dot of reverse flow driving
Show that the actual life attenuation curve of panel is longer than the life time decay curve for not applying reverse current, attenuation degree obviously slows down.
Embodiment 4
When the reverse drive signals are square wave reverse current, exist as shown in Figure 10, among the reverse drive signals empty
Set driving signal, the reverse drive signals can followed by forward driving signal or followed by vacant driving signal；Specifically
Ground, the reverse drive signals, forward driving signal and vacant driving signal form a drive cycle, followed by forward driving
The percentage that the time of the reverse current of signal accounts for the period is ra, and the time of the reverse current of followed by vacant driving signal accounts for week
The percentage of phase is rb, and the percentage that the time of vacant driving signal accounts for the period is r0, and the time of reverse drive signals accounts for the period
Percentage ra+rb be 1%-99%, the frequency f of the reverse current is not less than 60HZ, the amplitude Ire of the reverse current is-
0.0001Am/cm-2~-1Am/cm-2, when it is implemented, can the suitable percentage in range of choice, frequency according to the actual situation
And amplitude, with the promotion effect being optimal；
Specifically, it is 120Hz that the frequency of the reverse current, which is f, and the time of the followed by reverse current of forward driving signal accounts for
The percentage ra in period is 30%, and the percentage rb that the time of the reverse current of followed by vacant driving signal accounts for the period is 0%, empty
It is 15% that the time for setting driving signal, which accounts for the percentage r0 in period, and the amplitude Ire of reverse current is -0.002 Am/cm-2, such as Figure 11
It is shown, it is longer than using the actual life attenuation curve of the active driving quantum dot display panel of backward voltage driving and is not applied
The life time decay curve of reverse current, attenuation degree obviously slow down.
Embodiment 5
When the reverse drive signals are the square wave backward voltage and square wave reverse current being alternately present, and described it is driven in the reverse direction letter
When number vacant driving signal is not present, as shown in figure 12, the backward voltage is less than active driving quantum dot display panel
Breakdown voltage, the reverse current be less than it is active driving quantum dot display panel breakdown current, the backward voltage when
Between to account for the percentage in period be rV, the percentage that the time of the reverse current accounts for the period is rI, the backward voltage and reversed
The percentage rV+rI that the sum of time of electric current accounts for the period is 1%-99%, and the frequency f of driving is not less than 60HZ, the backward voltage
Amplitude Vre be -0.1V ~ -10V, the amplitude Ire of the reverse current is -0.0001Am/cm-2~-1Am/cm-2；
It specifically, is 80Hz when the frequency of driving is f, the percentage rI that the time of reverse current accounts for the period is 50%, reverse current
Amplitude Ire be -0.001Am/cm-2, the percentage rV that the time of backward voltage accounts for the period is 40%, the amplitude of backward voltage is-
3V, as shown in figure 13, the actual life attenuation curve using the active driving quantum dot display panel being driven in the reverse direction are longer than not
There is the life time decay curve for applying reverse drive signals, attenuation degree obviously slows down.
Embodiment 6
When the reverse drive signals are the square wave backward voltage and square wave reverse current being alternately present, and described it is driven in the reverse direction letter
There are when vacant driving signal in number, as shown in figure 14, the reverse drive signals, forward driving signal and vacant driving signal
A drive cycle is formed, the percentage that the time of the backward voltage accounts for the period is rV, and the time of the reverse current accounts for week
The percentage of phase is rI, and the percentage rV+rI that the sum of the backward voltage and the time of reverse current account for the period is 1%-99%, empty
It is r0 that the time for setting driving signal, which accounts for the percentage in period, and the amplitude Vre of the backward voltage is -0.1V ~ -10V, described reversed
The amplitude Ire of electric current is -0.0001Am/cm-2~-1Am/cm-2, when it is implemented, can be according to the actual situation in range of choice
Suitable percentage, frequency and amplitude, with the promotion effect being optimal；
It specifically, is 120Hz when the frequency of the reverse current is f, followed by time of the reverse current of forward driving signal
The percentage rI for accounting for the period is 30%, and the percentage rV that the time of the backward voltage of followed by vacant driving signal accounts for the period is
10%, the percentage r0 that the time of vacant driving signal accounts for the period is 15%, and the amplitude Ire of reverse current is -0.002 Am/cm-2,
The amplitude of backward voltage is -2V, as shown in figure 15, using the reality of the active driving quantum dot display panel of backward voltage driving
Border life time decay curve is longer than the life time decay curve for not applying reverse drive signals, and attenuation degree obviously slows down.
Embodiment 7
When the reverse drive signals are triangular wave backward voltage, as shown in figure 16, the triangular wave backward voltage is and then
Positive driving signal, the backward voltage are less than the breakdown voltage of active driving quantum dot display panel；When described reversed
When the waveform of voltage is triangular wave, in ascent stage, over time, backward voltage becomes larger；Conversely, in the decline stage,
Over time, backward voltage becomes smaller；Dynamic voltage system can effectively reduce active driving quantum dot display panel
Carrying, make it have the reaction of lesser capacitor and inductor.The reverse drive signals and forward driving signal form a driving
In the period, the percentage r that the time of the backward voltage accounts for the period is 1%-99%, and the frequency f of backward voltage is not less than 60HZ, described
The amplitude Vre of backward voltage is -0.1V ~ -10V, when it is implemented, suitable percentage that can according to the actual situation in range of choice
Than, frequency and amplitude, with the promotion effect being optimal；
Specifically, when the frequency f of the backward voltage is 60Hz, the percentage r that the time of backward voltage accounts for the period is 50%, instead
It is -3V to the amplitude Vre of voltage, as shown in figure 17, is shown using the active driving quantum dot that triangular wave backward voltage drives
The actual life attenuation curve of panel is longer than the life time decay curve for not applying backward voltage, and attenuation degree obviously slows down.
Embodiment 8
When the reverse drive signals be triangular wave backward voltage, and the triangular wave backward voltage load in a negative pressure Vre
When upper, as shown in figure 18, the peak value of the triangular wave is Vtr, and the percentage r that the time of the backward voltage accounts for the period is 1%-
99%, the frequency f of backward voltage are not less than 60HZ, and the amplitude Vre+Vtr of the backward voltage is -0.1V ~ -10V, specific implementation
When, suitable percentage, frequency and amplitude that can according to the actual situation in range of choice, with the promotion effect being optimal；
Specifically, when the frequency f of the backward voltage is 60Hz, the percentage r that the time of backward voltage accounts for the period is 50%, instead
It is -5V to the amplitude Vre+Vtr of voltage, as shown in figure 19, the active driving quantum dot driven using triangular wave backward voltage
The actual life attenuation curve of display panel is longer than the life time decay curve for not applying backward voltage, and attenuation degree obviously subtracts
It is slow.
Embodiment 9
When the reverse drive signals be oblique wave backward voltage, and the oblique wave backward voltage load when on a negative pressure Vre,
As shown in figure 20, the peak value of the oblique wave is Vtr, and the value of the Vtr can just be born, and the time of the backward voltage accounts for the period
Percentage r is 1%-99%, and the frequency f of backward voltage is not less than 60HZ, the amplitude Vre+Vtr of the backward voltage be -0.1V ~ -
10V, when it is implemented, suitable percentage, frequency and amplitude that can according to the actual situation in range of choice, with what is be optimal
Promote effect；
Specifically, when the frequency f of the backward voltage is 60Hz, the percentage r that the time of backward voltage accounts for the period is 50%, instead
It is -5V to the amplitude Vre+Vtr of voltage, as shown in figure 21, the active driving quantum dot using the driving of oblique wave backward voltage is aobvious
Show that the actual life attenuation curve of panel is longer than the life time decay curve for not applying backward voltage, attenuation degree obviously slows down.
Embodiment 10
When the direction driving signal is sine wave backward voltage, as shown in figure 22, the sine wave backward voltage is and then
Positive driving signal, the backward voltage are less than the breakdown voltage of active driving quantum dot display panel；The sine wave
Reverse drive signals and forward driving signal form a drive cycle, and the time of the sine wave backward voltage accounts for the hundred of the period
Dividing than r is 1%-99%, and the frequency f of backward voltage is not less than 60HZ, and the amplitude Vre of the backward voltage is -0.1V ~ -10V, tool
When body is implemented, suitable percentage, frequency and amplitude that can according to the actual situation in range of choice, with the promotion effect being optimal
Fruit；
Specifically, when the frequency f of the backward voltage is 60Hz, the percentage r that the time of sine wave backward voltage accounts for the period is
50%, the amplitude Vre of backward voltage is -3V, as shown in figure 23, the active driving quantum driven using sine wave backward voltage
The actual life attenuation curve of point display panel is longer than the life time decay curve for not applying backward voltage, and attenuation degree obviously subtracts
It is slow.
In conclusion the driving method of the active driving quantum dot display panel of one kind provided by the invention, by each
Pixel is equipped with the thin film transistor (TFT) with switching function, when the corresponding thin film transistor (TFT) of any pixel point is switched to closing shape
When state, an excitation source signal being driven in the reverse direction is added in the driving circuit；When the excitation source signal is excited, to the picture
Vegetarian refreshments applies a reverse drive signals, to eliminate the charge being limited in the pixel；The reverse drive signals change
The potential barrier of defect potential well, the charge for eliminating limitation and being gathered in potential well reduce the density of limitation charge, to extend
The service life of active driving quantum dot display panel simultaneously improves its display brightness.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of driving method of active driving quantum dot display panel characterized by comprising
A, each pixel is equipped with the thin film transistor (TFT) with switching function, when the corresponding thin film transistor (TFT) of any pixel point is cut
When being changed to closed state, an excitation source signal being driven in the reverse direction is added in the driving circuit；
B, when the excitation source signal is excited, a reverse drive signals are applied to the pixel, are limited in institute to eliminate
State the charge in pixel.
2. the driving method of active driving quantum dot display panel according to claim 1, which is characterized in that described anti-
It is that backward voltage, reverse current or backward voltage and reverse current are used alternatingly to driving signal.
3. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
It is at least one of square wave, triangular wave, oblique wave or sine wave to the waveform of voltage.
4. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
It is at least one of square wave, triangular wave, oblique wave or sine wave to the waveform of electric current.
5. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
It is less than the breakdown voltage of active driving quantum dot display panel to voltage.
6. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
It is less than the breakdown current of active driving quantum dot display panel to electric current.
7. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
The percentage for accounting for the period to the time of voltage is 1%-99%, and the frequency of the backward voltage is not less than 60HZ, the backward voltage
Amplitude be -0.1V ~ -10V.
8. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
The percentage for accounting for the period to the time of electric current is 1%-99%, and the frequency of the reverse current is not less than 60HZ, the reverse current
Amplitude be -0.0001Am/cm-2~-1Am/cm-2。
9. the driving method of active driving quantum dot display panel according to claim 2, which is characterized in that described anti-
When being used alternatingly to driving signal for backward voltage with reverse current, the frequency of the backward voltage is not less than 60HZ, described anti-
It is -0.1V ~ -10V to the amplitude of voltage；The frequency of the reverse current is not less than 60HZ, and the amplitude of the reverse current is-
0.0001Am/cm-2~-1Am/cm-2；The time of percentage and reverse current that the time of the backward voltage accounts for the period accounts for the period
The sum of percentage be 1% ~ 99%.
10. the driving method of active driving quantum dot display panel according to claim 1, which is characterized in that described
Vacant driving signal is provided among reverse drive signals.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4030497A1 (en) * | 2021-01-18 | 2022-07-20 | Samsung Electronics Co., Ltd. | Light emitting element and display device including the same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541502A (en) * | 2001-08-09 | 2004-10-27 | ������������ʽ���� | Organic electroluminescent display device and driving method thereof |
| CN1828707A (en) * | 2005-03-03 | 2006-09-06 | 株式会社日立显示器 | Driving method and display device of organic EL device |
| US20080309234A1 (en) * | 2007-06-15 | 2008-12-18 | Samsung Electronics Co., Ltd. | Alternating current driving type quantum dot electroluminescent device |
| CN104362258A (en) * | 2014-11-07 | 2015-02-18 | 北京维信诺科技有限公司 | Organic light-emitting device with long service life |
| CN104966725A (en) * | 2015-05-07 | 2015-10-07 | 深圳市华星光电技术有限公司 | Quantum dot light emitting diode display |
| CN105047138A (en) * | 2015-09-15 | 2015-11-11 | 深圳市华星光电技术有限公司 | Driving system of display device and driving circuit suitable for OLED |
| CN106549111A (en) * | 2016-12-07 | 2017-03-29 | Tcl集团股份有限公司 | Exchange electrically driven (operated) light emitting diode with quantum dots, its preparation method and application |
-
2017
- 2017-05-23 CN CN201710370257.XA patent/CN109064968A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541502A (en) * | 2001-08-09 | 2004-10-27 | ������������ʽ���� | Organic electroluminescent display device and driving method thereof |
| CN1828707A (en) * | 2005-03-03 | 2006-09-06 | 株式会社日立显示器 | Driving method and display device of organic EL device |
| US20080309234A1 (en) * | 2007-06-15 | 2008-12-18 | Samsung Electronics Co., Ltd. | Alternating current driving type quantum dot electroluminescent device |
| CN104362258A (en) * | 2014-11-07 | 2015-02-18 | 北京维信诺科技有限公司 | Organic light-emitting device with long service life |
| CN104966725A (en) * | 2015-05-07 | 2015-10-07 | 深圳市华星光电技术有限公司 | Quantum dot light emitting diode display |
| CN105047138A (en) * | 2015-09-15 | 2015-11-11 | 深圳市华星光电技术有限公司 | Driving system of display device and driving circuit suitable for OLED |
| CN106549111A (en) * | 2016-12-07 | 2017-03-29 | Tcl集团股份有限公司 | Exchange electrically driven (operated) light emitting diode with quantum dots, its preparation method and application |
Non-Patent Citations (1)
| Title |
|---|
| 周志敏: "《漫步LED世界 基础篇》", 31 July 2012, 国防工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4030497A1 (en) * | 2021-01-18 | 2022-07-20 | Samsung Electronics Co., Ltd. | Light emitting element and display device including the same |
| US11710448B2 (en) | 2021-01-18 | 2023-07-25 | Samsung Electronics Co., Ltd. | Light emitting element and display device including the same |
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