CN107507565B - Scanning signal generation method and device, display device - Google Patents
Scanning signal generation method and device, display device Download PDFInfo
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- CN107507565B CN107507565B CN201710897765.3A CN201710897765A CN107507565B CN 107507565 B CN107507565 B CN 107507565B CN 201710897765 A CN201710897765 A CN 201710897765A CN 107507565 B CN107507565 B CN 107507565B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
Abstract
Present disclose provides a kind of scanning signal generation method and devices, display device.Applied to field of display technology.The scanning signal generation method may include: to provide a Continuity signal；There is provided a cut-off signals, wherein within the black plug stage of the pixel-driving circuit, jump according to cut-off signals described in the Type Control of the switching transistor to a predeterminated voltage；The scanning signal is generated according to the Continuity signal and the cut-off signals.The disclosure passed through within the black plug stage, it is jumped with a predetermined manner to a predeterminated voltage according to the Type Control cut-off signals of switching transistor, therefore, even if negative sense drift occurs for the threshold voltage of switching transistor, switching transistor after the after the jump cut-off signals can also drift about threshold voltage turns off, to prevent the charge in capacitor from leaking electricity by switching transistor, so that the display brightness of electroluminescent cell is consistent, so as to avoid the generation of colour contamination and splashette phenomenon.
Description
Technical field
This disclosure relates to field of display technology more particularly to a kind of scanning signal generation method and device, display device.
Background technique
In display actuation techniques, scan line (scan line) and data line (data line) intersect composition active matrix
(active matrix).Wherein, scan line provides scanning signal for the switching transistor into pixel-driving circuit, with control
The turn-on and turn-off of switching transistor processed, data line are used to provide data-signal to pixel-driving circuit.
Currently, the scanning signal in scan line is usually the working stage according to pixel-driving circuit and combines permanent with one
The Continuity signal of constant voltage and cut-off signals with a constant voltage and generate.With pixel-driving circuit shown in Fig. 1, and
For transistor in the pixel-driving circuit is N-type transistor, to the first scanning signal G1 in the pixel-driving circuit
Generating process be illustrated.The pixel-driving circuit includes charging stage (i.e. T1 period) and non-charging stage (i.e. when T2
Between section), wherein non-charging stage (i.e. T2 period) includes the first light emitting phase (i.e. t1 period), the black plug stage is (i.e. when t2
Between section) and the second light emitting phase (i.e. t3 period).Based on this, as shown in Fig. 2, the generating process packet of the first scanning signal G1
It includes: in charging stage (i.e. T1 period), gating Continuity signal VGH (Continuity signal is high level)；The non-charging stage (i.e.
The T2 period), gating cut-off signals VGL (cut-off signals are low level) ultimately generates the first scanning letter as shown in Figure 2
Number G1.
Since switching transistor is under the influence of long-term illumination, negative sense drift can occur for the threshold voltage of the switching transistor
It moves, therefore, when negative sense drift occurs for the threshold voltage of switching transistor, which possibly can not complete switch off the switch
Transistor.Based on this, by taking the transistor in the pixel-driving circuit in Fig. 1 is N-type transistor as an example, and combines and show in Fig. 3
The working timing figure of pixel-driving circuit out is illustrated the course of work of the pixel-driving circuit in Fig. 1.It is shown in Fig. 3
The OLED of data-signal DATA, the first scanning signal G1 and electroluminescent cell show bright L degree.It should be noted that Fig. 3
In the first scanning signal G1 be Fig. 2 in the first scanning signal G1.
In charging stage (i.e. T1 period), the first scanning signal G1 is high level, first switch transistor T1 conducting, number
It is believed that number DATA charges to capacitor C by first switch transistor T1, and controls driving transistor DK and believe in the first power supply
Driving electroluminescent cell OLED is carried out luminous under the action of number VDD, at this point, the display brightness L of electroluminescent cell OLED
As shown in Figure 3.In the first light emitting phase (i.e. t1 period), the first scanning signal G1 is low level, and data-signal DATA is height
Level, at this point, since negative sense drift occurs for the threshold voltage of first switch transistor T1, the first scanning signal G1 may
First switch transistor T1 can not be complete switched off, but since data-signal DATA is high level, even if first switch is brilliant
Body pipe T1 is not completely off, and the charge in capacitor C will not be leaked electricity by first switch crystal T1 pipe to data-signal DATA,
Therefore, the display brightness L of electroluminescent cell OLED is remained unchanged.In black plug stage (i.e. t2 period), due to data-signal
DATA is set to low level, and first switch transistor T1 possibly can not be complete switched off, and therefore, the charge on capacitor C may
It leaks electricity by the first switch transistor T1 not exclusively turned off to data-signal DATA, at this point, electroluminescent cell OLED's is aobvious
Show that brightness L will be gradually decreased even wholly without brightness, causes colour contamination phenomenon occur.In the second light emitting phase (i.e. t3 time
Section), although data-signal DATA is reset as high level, since first switch transistor T1 can be completely switched off at this time,
Therefore, the display brightness L of electroluminescent cell OLED is still very low or does not have brightness.In (the i.e. T3 time next charging stage
Section), since the first scanning signal G1 is high level, first switch transistor T1 is connected, and capacitor C is recharged, causes electroluminescent
The display brightness L of light-emitting component OLED increases, to splashette phenomenon occur.
In summary, it is desirable to provide a kind of scanning signal generation method can make the scanning signal generated by this method
When negative sense drift occurs for the threshold voltage of switching transistor, the switching transistor still can be turned off.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure is designed to provide a kind of scanning signal generation method and a kind of scanning signal generating means, display dress
It sets, and then overcomes the problems, such as caused by the limitation and defect due to the relevant technologies one or more at least to a certain extent.
According to one aspect of the disclosure, a kind of scanning signal generation method is provided, for in pixel-driving circuit
The control terminal of switching transistor provides scanning signal:
One Continuity signal is provided；
There is provided a cut-off signals, wherein within the black plug stage of the pixel-driving circuit, according to the switching transistor
Type Control described in cut-off signals jump to a predeterminated voltage；
The scanning signal is generated according to the Continuity signal and the cut-off signals.
It is described to be turned off according to the Type Control of the switching transistor in a kind of exemplary embodiment of the disclosure
Signal is jumped to a predeterminated voltage
When the switching transistor is N-type transistor, controls the cut-off signals negative sense and jump to the predeterminated voltage.
It is described to be turned off according to the Type Control of the switching transistor in a kind of exemplary embodiment of the disclosure
Signal is jumped to a predeterminated voltage
When the switching transistor is P-type transistor, the cut-off signals positive transition is controlled to the predeterminated voltage.
It is described that institute is generated according to the Continuity signal and the cut-off signals in a kind of exemplary embodiment of the disclosure
Stating scanning signal includes:
In the charging stage of the pixel-driving circuit, the Continuity signal is gated；
In the non-charging stage of the pixel-driving circuit, the cut-off signals are gated, wherein the non-charging stage packet
Include the black plug stage.
In a kind of exemplary embodiment of the disclosure, the predeterminated voltage is according to the threshold voltage of the switching transistor
Negative sense drift value determine.
According to one aspect of the disclosure, a kind of scanning signal generating means are provided, for in pixel-driving circuit
The control terminal of switching transistor provides scanning signal, comprising:
First provides module, for providing a Continuity signal；
Second provides module, for providing a cut-off signals, wherein within the black plug stage of the pixel-driving circuit,
It is jumped according to cut-off signals described in the Type Control of the switching transistor to a predeterminated voltage；
Signal generation module, for generating the scanning signal according to the Continuity signal and the cut-off signals.
It is described to be turned off according to the Type Control of the switching transistor in a kind of exemplary embodiment of the disclosure
Signal is jumped to a predeterminated voltage
When the switching transistor is N-type transistor, controls the cut-off signals negative sense and jump to the predeterminated voltage.
It is described to be turned off according to the Type Control of the switching transistor in a kind of exemplary embodiment of the disclosure
Signal is jumped to a predeterminated voltage
When the switching transistor is P-type transistor, the cut-off signals positive transition is controlled to the predeterminated voltage.
In a kind of exemplary embodiment of the disclosure, the predeterminated voltage is according to the threshold voltage of the switching transistor
Drift value determine.
According to one aspect of the disclosure, a kind of display device is provided, including scanning signal described in above-mentioned any one
Generating means.
A kind of scanning signal generation method that a kind of exemplary embodiment of the disclosure provides, a kind of scanning signal generating means
And display device, the scanning signal generation method include: to provide a Continuity signal；There is provided a cut-off signals, wherein drive in pixel
In the black plug stage of dynamic circuit, the cut-off signals according to the Type Control of switching transistor are jumped to a predeterminated voltage；And
Scanning signal is generated according to Continuity signal and cut-off signals, it is brilliant to control the switch in pixel-driving circuit by the scanning signal
The turn-on and turn-off of body pipe.Compared with the prior art, by being turned off according to the Type Control of switching transistor within the black plug stage
Signal is jumped to a predeterminated voltage, therefore, even if negative sense drift, the after the jump shutdown occur for the threshold voltage of switching transistor
Switching transistor after signal can also drift about threshold voltage turns off, to prevent the charge in capacitor from passing through switch crystal
Pipe leaks electricity, so that the display brightness of electroluminescent cell is consistent, so as to avoid the generation of colour contamination and splashette phenomenon.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Detailed description of the invention
It is described in detail its exemplary embodiment by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become
It obtains more obvious.It should be evident that the accompanying drawings in the following description is only some embodiments of the present disclosure, it is common for this field
For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.Attached
In figure:
Fig. 1 is the schematic diagram of the pixel-driving circuit provided in one exemplary embodiment of the disclosure；
Fig. 2 is that the first scanning signal provided in one exemplary embodiment of the disclosure generates schematic diagram；
Fig. 3 is the working timing figure one of the pixel-driving circuit provided in one exemplary embodiment of the disclosure；
Fig. 4 is a kind of flow chart of scanning signal generation method of the disclosure；
Fig. 5 is the timing diagram one of the cut-off signals provided in one exemplary embodiment of the disclosure；
Fig. 6 is the timing diagram two of the cut-off signals provided in one exemplary embodiment of the disclosure；
Fig. 7 is that the scanning signal provided in one exemplary embodiment of the disclosure generates schematic diagram one；
Fig. 8 is that the scanning signal provided in one exemplary embodiment of the disclosure generates schematic diagram two；
Fig. 9 is the working timing figure two of the pixel-driving circuit provided in one exemplary embodiment of the disclosure；
Figure 10 is a kind of block diagram of scanning signal generating means of the disclosure.
Description of symbols:
T1: first switch transistor；
T2: second switch transistor；
DT: driving transistor；
C: capacitor；
OLED: electroluminescent cell；
DATA: data-signal；
SENSE: black frame insertion signals；
G: scanning signal
G1: the first scanning signal；
G2: the second scanning signal；
VDD: the first power supply signal；
VSS: second source signal；
VGH: Continuity signal；
VGL: cut-off signals；
L: display brightness.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will be comprehensively and complete
It is whole, and the design of example embodiment is comprehensively communicated to those skilled in the art.Described feature, structure or characteristic can
Be incorporated in one or more embodiments in any suitable manner.In the following description, provide many details from
And it provides and embodiment of the disclosure is fully understood.It will be appreciated, however, by one skilled in the art that can be of the disclosure
Technical solution, or can be using other methods, constituent element, material, dress without one or more in the specific detail
It sets, step etc..In other cases, known solution is not shown in detail or describes to avoid fuzzy all aspects of this disclosure.
In addition, attached drawing is only the schematic illustrations of the disclosure, not necessarily it is drawn to scale.Identical attached drawing in figure
Label identifies the same or similar part, thus will omit repetition thereof.
A kind of scanning signal generation method is provided in this example embodiment, for for the switch in pixel-driving circuit
The control terminal of transistor provides scanning signal.Fig. 1 is the schematic diagram of the corresponding pixel-driving circuit of scanning signal generation method,
The pixel-driving circuit includes: the electroluminescent cell for driving transistor DT, capacitor C and a connection driving transistor DT
OLED；The control terminal of driving transistor DT receives data-signal DATA, first end connection the by first switch transistor T1
One power supply signal VDD, second end receive black frame insertion signals SENSE by second switch transistor T2；The both ends of capacitor C respectively with
The control terminal of driving transistor DK is connected with second end, and the other end of electroluminescent cell OLED connects second source signal VSS；
Wherein, the control terminal of first switch transistor T1 receives the first scanning signal G1, and the control terminal of second switch transistor T2 receives
Second scanning signal G2.In addition, the pixel-driving circuit includes charging stage (i.e. T1 period) and uncharged stage (i.e. when T2
Between section), wherein the uncharged stage (i.e. T2 period) includes the first light emitting phase (i.e. t1 period), the black plug stage is (i.e. when t2
Between section) and the second light emitting phase (i.e. t3 period).It should be noted that in pixel-driving circuit in Fig. 1, the crystalline substance
Body pipe can be P-type transistor or N-type transistor, and the present exemplary embodiment is not particularly limited this.In addition, all crystal
Pipe can be enhancement transistor or depletion mode transistor, be not particularly limited here.
Based on this, as shown in figure 4, the scanning signal generation method may include:
Step S1 provides a Continuity signal；
Step S2 provides a cut-off signals, wherein within the black plug stage of the pixel-driving circuit, is opened according to described
Cut-off signals described in the Type Control of transistor are closed to jump with a predetermined manner to a predeterminated voltage；
Step S3 generates the scanning signal according to the Continuity signal and the cut-off signals.
Scanning signal generation method provided by a kind of illustrative embodiments of the disclosure passes through compared with the prior art
Within the black plug stage, jumped with a predetermined manner to a predeterminated voltage according to the Type Control cut-off signals of switching transistor, because
This, even if negative sense drift occurs for the threshold voltage of switching transistor, which also threshold voltage can occur
Switching transistor shutdown after drift, to prevent the charge in capacitor from leaking electricity by switching transistor, so that electroluminescent hair
The display brightness of optical element is consistent, so as to avoid the generation of colour contamination and splashette phenomenon.
The scanning signal generation method in the present exemplary embodiment will be described in detail below.
In step S1, a Continuity signal is provided.
In the present example embodiment, the Continuity signal has a conducting voltage, which can be high level
It may be low level, specifically, the conducting voltage is high level when switching transistor is N-type transistor；In switch crystal
When pipe is P-type transistor, which is low level.The specific value of the conducting voltage can be according to the threshold of switching transistor
Threshold voltage is configured.
In step s 2, a cut-off signals are provided, wherein within the black plug stage of the pixel-driving circuit, according to institute
Cut-off signals described in the Type Control of switching transistor are stated to jump with a predetermined manner to a predeterminated voltage.
In the present example embodiment, the cut-off signals have an inherent voltage and a predeterminated voltage.The intrinsic electricity
Pressure and the predeterminated voltage can may be low level voltage for high level, specifically, being N-type transistor in switching transistor
When, the inherent voltage and the predeterminated voltage are low level；Switching transistor be P-type transistor when, the inherent voltage with
And the predeterminated voltage is high level.The specific value of the inherent voltage can be according to the shutdown of the control terminal of switching transistor
Voltage is configured.The specific value of the predeterminated voltage can be according to the shutdown voltage and switch of the control terminal of switching transistor
The negative sense drift value of the threshold voltage of transistor is configured, so that the predeterminated voltage can complete switch off threshold voltage and occur to bear
To the switching transistor of drift.
The hop mode of the cut-off signals may include that positive transition and negative sense jump, specifically can be brilliant according to switch
The type of body pipe is determined.
For example, inherent voltage and predeterminated voltage in cut-off signals are low when switching transistor is N-type transistor
Level.As shown in figure 5, in the charging stage (i.e. T1 period) of pixel-driving circuit and the first light emitting phase (i.e. t1 time
Section) in, cut-off signals VGL is always maintained at inherent voltage A；Within the black plug stage (i.e. t2 period) of pixel-driving circuit, control
Cut-off signals VGL negative sense processed is jumped to predeterminated voltage B；In the second light emitting phase (i.e. t3 period) of pixel-driving circuit, control
Cut-off signals VGL positive transition processed is to above-mentioned inherent voltage A.It should be noted that when switching transistor is N-type transistor,
Inherent voltage A is greater than predeterminated voltage B.
For another example the inherent voltage and predeterminated voltage in cut-off signals are equal when switching transistor is P-type transistor
For high level.As shown in fig. 6, in the charging stage (i.e. T1 period) of pixel-driving circuit and the first light emitting phase (i.e. t1
Period) in, cut-off signals VGL is always maintained at above-mentioned inherent voltage A；In (the i.e. t2 time in black plug stage of pixel-driving circuit
Section) in, control cut-off signals VGL positive transition to above-mentioned predeterminated voltage B；Pixel-driving circuit the second light emitting phase (i.e.
The t3 period), control cut-off signals VGL negative sense is jumped to above-mentioned inherent voltage A.It should be noted that being P in switching transistor
When transistor npn npn, inherent voltage A is less than predeterminated voltage B.
From the foregoing, it will be observed that by within the black plug stage, according to the Type Control cut-off signals of switching transistor with a default side
Formula is jumped to a predeterminated voltage, therefore, even if negative sense drift, after the jump cut-off signals occur for the threshold voltage of switching transistor
Also the switching transistor after threshold voltage drifting about complete switches off, to prevent the charge in capacitor from passing through switch crystal
Pipe leaks electricity, so that the display brightness of electroluminescent cell is consistent, so as to avoid the generation of colour contamination and splashette phenomenon.
In step s3, the scanning signal is generated according to the Continuity signal and the cut-off signals.
In the present example embodiment, conducting letter can be gated according to each working stage of the pixel-driving circuit in Fig. 1
Number or cut-off signals to generate scanning signal.It should be noted that the scanning signal generated to first in Fig. 1 for opening herein
It closes transistor and scanning signal is provided, i.e., the scanning signal generated herein is the first scanning signal G1 in Fig. 1.
In the following, each working stage of pixel-driving circuit as shown in connection with fig. 1, says the generating process of scanning signal
It is bright.
For example, when switching transistor is N-type transistor, as shown in fig. 7, Continuity signal VGH is high level, cut-off signals
VGL includes inherent voltage A and predeterminated voltage B, and inherent voltage A and predeterminated voltage B are low level；Wherein, inherent voltage A
Greater than predeterminated voltage B.Based on this, the generating process of scanning signal G may include: in charging stage (i.e. T1 period), gating
Continuity signal VGH；In non-charging stage (i.e. T2 period), cut-off signals VGL is gated, wherein non-(i.e. T2 time charging stage
Section) it include black plug stage (i.e. the t2 period)；It repeats the above process, that is, produces scanning signal G as shown in Figure 7.
For another example when switching transistor is P-type transistor, as shown in figure 8, Continuity signal VGH is low level, shutdown letter
Number VGL includes inherent voltage A and predeterminated voltage B, and inherent voltage A and predeterminated voltage B are high level；Wherein, intrinsic electricity
A is pressed to be less than predeterminated voltage B.Based on this, the generating process of scanning signal G may include: in charging stage (i.e. T1 period), choosing
Admittance messenger VGH；In non-charging stage (i.e. T2 period), cut-off signals VGL is gated, wherein the non-charging stage is (i.e. when T2
Between section) include black plug stage (i.e. the t2 period).It repeats the above process, that is, produces scanning letter G as shown in Figure 8.
In the following, work of the working timing figure of pixel-driving circuit as shown in connection with fig. 9 to the pixel-driving circuit in Fig. 1
Process is illustrated, by taking all transistors are N-type transistor as an example.Data-signal DATA, the first scanning letter are shown in Fig. 9
The display brightness L of number G1, electroluminescent cell OLED.It should be noted that the working timing figure of the first scanning signal G1 herein
It is identical as the working timing figure of scanning signal G of the generation in Fig. 7.
In charging stage (i.e. T1 period), data-signal DATA is high level, and the first scanning signal G1 is high level, the
One switching transistor T1 is connected under the action of the first scanning signal G1, and data-signal DATA is passed by first switch transistor T1
The control terminal of driving transistor DK is transported to, at this point, the control terminal of driving transistor DK acts on conducting in data-signal DATA,
And output driving current under the action of the first power supply signal VDD, it is luminous to drive electroluminescent cell OLED to carry out, it is electric at this time
The display brightness L of electroluminescent element OLED is consistent, in addition, data-signal DATA is transmitted to by first switch transistor T1
Capacitor C, to charge to capacitor C.
In the first light emitting phase (i.e. t1 period), data-signal DATA is high level, and the first scanning signal G1 is low electricity
It is flat, it should be noted that low level herein is intrinsic level.On this basis, in the threshold voltage of first switch transistor T1
There is no when negative sense drift, the first scanning signal G1 can complete switch off first switch transistor T1, at this point, driving transistor
DK is connected under the action of capacitor C, and under the action of the first power supply signal VDD output driving current to drive electroluminescent first
Part OLED carries out luminous, the electroluminescent cell OLED of the display brightness L and charging stage of electroluminescent cell OLED at this time
Display brightness L is consistent.When negative sense drift occurs for the threshold voltage of the first transistor T1, the first scanning signal G1 may nothing
Method complete switches off first switch transistor T1, but since data-signal DATA is high level, even if first switch transistor
T1 is not completely off, and the charge on capacitor C will not be by the first switch transistor T1 that not exclusively turns off to data-signal
DATA electric leakage, therefore, voltage or whole act on capacitor C drive on transistor DK, so that electroluminescent cell
The display brightness L of the electroluminescent cell OLED of the display brightness L and charging stage of OLED is consistent.
In black plug stage (i.e. t2 period), data-signal DATA is low level, and the first scanning signal G1 is low level, is needed
To illustrate that low level herein is predetermined level.On this basis, no matter the threshold voltage of first switch transistor T1 is
No generation negative sense drift, since the first scanning signal G1 at this time is predetermined level, the first scanning signal G1 can be complete
First switch transistor T1 is turned off, so that charge on capacitor C will not be by the first switch transistor that not exclusively turns off
T1 leaks electricity to data-signal DATA, and therefore, voltage or whole act on capacitor C drive on transistor DK, so that
The display brightness L of the electroluminescent cell OLED of the display brightness L and charging stage of electroluminescent cell OLED is consistent.
In the second light emitting phase (i.e. t3 period), data-signal DATA is high level, and the first scanning signal G1 is low electricity
It is flat, it should be noted that low level herein is intrinsic level.On this basis, since data-signal DATA is high level, and
In black plug stage (i.e. t2 period), there is no leakies for electric C appearance, and therefore, the display of electroluminescent cell OLED is bright
The display brightness L of degree L and the electroluminescent cell OLED in black plug stage (i.e. t2 period) are consistent.
In next charging stage (i.e. T3 period), data-signal DATA is high level, and the first scanning signal G1 is high electricity
Flat, first switch transistor T1 is connected under the action of the first scanning signal G1, and data-signal DATA passes through first switch crystal
Pipe T1 is transmitted to the control terminal of driving transistor DK and charges to capacitor C, at this point, the control terminal of driving transistor DK is in number
It is believed that number DATA's acts on conducting, and output driving current under the action of the first power supply signal VDD, to drive OLED to carry out
It shines, and the display brightness L of electroluminescent cell OLED and the second light emitting phase of electroluminescent cell (i.e. t3 period)
The display brightness L of OLED is consistent.
In conclusion the display brightness of the electroluminescent cell OLED in above-mentioned each stage is consistent, therefore, no
It will appear due to the colour contamination phenomenon that display brightness reduces and occurs, and the splashette phenomenon occurred due to display brightness increase.
A kind of scanning signal generating means are additionally provided in the present exemplary embodiment, for in Fig. 1 pixel driver electricity
The control terminal of switching transistor in road provides scanning signal, and as shown in Figure 10, which can wrap
Include: first, which provides module 101, second, provides module 102 and signal generation module 103.Wherein:
First offer module 101 may be used to provide a Continuity signal；
Second offer module 102 may be used to provide a cut-off signals, wherein in the black plug rank of the pixel-driving circuit
In section, jumped with a predetermined manner to a predeterminated voltage according to cut-off signals described in the Type Control of the switching transistor；
Signal generation module 103 can be used for generating the scanning letter according to the Continuity signal and the cut-off signals
Number.
It should be noted that each module of the scanning signal generating means is in corresponding scanning signal generation method
It is described in detail, therefore, does not repeat herein.
This example embodiment additionally provides a kind of display device, including above-mentioned scanning signal generating means.Wherein, should
The display brightness that can make the electroluminescent cell of each pixel-driving circuit driving of display device is consistent, and avoids string
The generation of color and splashette phenomenon, so as to improve display image quality.In this example embodiment, the display device for example can be with
Including any product having a display function such as mobile phone, tablet computer, television set, laptop, Digital Frame, navigator or
Component.
It should be noted that although being referred to several modules or list for acting the equipment executed in the above detailed description
Member, but this division is not enforceable.In fact, according to embodiment of the present disclosure, it is above-described two or more
Module or the feature and function of unit can embody in a module or unit.Conversely, an above-described mould
The feature and function of block or unit can be to be embodied by multiple modules or unit with further division.
In addition, although describing each step of method in the disclosure in the accompanying drawings with particular order, this does not really want
These steps must be executed in this particular order by asking or implying, or having to carry out step shown in whole could realize
Desired result.Additional or alternative, it is convenient to omit multiple steps are merged into a step and executed by certain steps, and/
Or a step is decomposed into execution of multiple steps etc..
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
Claims (10)
1. a kind of scanning signal generation method, for providing scanning letter for the control terminal of the switching transistor in pixel-driving circuit
Number, it is characterised in that:
One Continuity signal is provided；
There is provided a cut-off signals, wherein within the black plug stage of the pixel-driving circuit, according to the class of the switching transistor
Type controls the cut-off signals to jump to a predeterminated voltage；Wherein, jump, can to the cut-off signals after the predeterminated voltage
So that the switching transistor shutdown after negative sense drift occurs for threshold voltage；
The scanning signal is generated according to the Continuity signal and the cut-off signals.
2. scanning signal generation method according to claim 1, which is characterized in that described according to the switching transistor
Cut-off signals described in Type Control are jumped to a predeterminated voltage
When the switching transistor is N-type transistor, controls the cut-off signals negative sense and jump to the predeterminated voltage.
3. scanning signal generation method according to claim 1, which is characterized in that described according to the switching transistor
Cut-off signals described in Type Control are jumped to a predeterminated voltage
When the switching transistor is P-type transistor, the cut-off signals positive transition is controlled to the predeterminated voltage.
4. scanning signal generation method according to claim 1, which is characterized in that described according to the Continuity signal and institute
Stating the cut-off signals generation scanning signal includes:
In the charging stage of the pixel-driving circuit, the Continuity signal is gated；
In the non-charging stage of the pixel-driving circuit, the cut-off signals are gated, wherein the non-charging stage includes institute
State the black plug stage.
5. scanning signal generation method described according to claim 1~any one of 4, which is characterized in that the default electricity
It is determined at all according to the negative sense drift value of the threshold voltage of the switching transistor.
6. a kind of scanning signal generating means, for providing scanning letter for the control terminal of the switching transistor in pixel-driving circuit
Number characterized by comprising
First provides module, for providing a Continuity signal；
Second provides module, for providing a cut-off signals, wherein within the black plug stage of the pixel-driving circuit, according to
Cut-off signals described in the Type Control of the switching transistor are jumped to a predeterminated voltage；Wherein, it jumps to the predeterminated voltage
Cut-off signals afterwards, the switching transistor shutdown after enabling to threshold voltage that negative sense drift occurs；
Signal generation module, for generating the scanning signal according to the Continuity signal and the cut-off signals.
7. scanning signal generating means according to claim 6, which is characterized in that described according to the switching transistor
Cut-off signals described in Type Control are jumped to a predeterminated voltage
When the switching transistor is N-type transistor, controls the cut-off signals negative sense and jump to the predeterminated voltage.
8. scanning signal generating means according to claim 6, which is characterized in that described according to the switching transistor
Cut-off signals described in Type Control are jumped to a predeterminated voltage
When the switching transistor is P-type transistor, the cut-off signals positive transition is controlled to the predeterminated voltage.
9. the scanning signal generating means according to any one of claim 6~8, which is characterized in that the default electricity
It is determined at all according to the drift value of the threshold voltage of the switching transistor.
10. a kind of display device, which is characterized in that generate and fill including scanning signal described in any one of claim 6~9
It sets.
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| CN201710897765.3A CN107507565B (en) | 2017-09-28 | 2017-09-28 | Scanning signal generation method and device, display device |
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| CN108281105B (en) * | 2018-03-30 | 2021-02-05 | 京东方科技集团股份有限公司 | Scanning signal adjusting method and device and display device |
| CN111179851A (en) * | 2020-02-25 | 2020-05-19 | 合肥鑫晟光电科技有限公司 | Pixel circuit, driving method thereof and display device |
| CN111798789B (en) * | 2020-07-16 | 2022-09-20 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof and display panel |
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| KR100437338B1 (en) * | 2002-08-27 | 2004-06-25 | 삼성에스디아이 주식회사 | Flat panel display |
| CN100365695C (en) * | 2004-10-08 | 2008-01-30 | 中华映管股份有限公司 | Driving method |
| TWI305335B (en) * | 2005-09-23 | 2009-01-11 | Innolux Display Corp | Liquid crystal display and method for driving the same |
| CN1987977A (en) * | 2005-12-22 | 2007-06-27 | 群康科技(深圳)有限公司 | Driving method for liquid crystal display panel |
| JP5032350B2 (en) * | 2008-01-21 | 2012-09-26 | シャープ株式会社 | Image processing device |
| CN101661719B (en) * | 2008-08-27 | 2012-06-27 | 晶宏半导体股份有限公司 | Black frame inserting method for liquid crystal display |
| TWI417850B (en) * | 2009-03-12 | 2013-12-01 | Chunghwa Picture Tubes Ltd | Displaying method of active matrix display |
| TWI560676B (en) * | 2015-12-07 | 2016-12-01 | Au Optronics Corp | Pixel circuit and driving method thereof |
| CN105702206B (en) * | 2016-03-04 | 2018-11-30 | 北京大学深圳研究生院 | A kind of offset peripheral system and method, the display system of picture element matrix |
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