CN110111713A - A kind of image retention method of discrimination of display panel, device, display equipment - Google Patents
A kind of image retention method of discrimination of display panel, device, display equipment Download PDFInfo
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- CN110111713A CN110111713A CN201910527572.8A CN201910527572A CN110111713A CN 110111713 A CN110111713 A CN 110111713A CN 201910527572 A CN201910527572 A CN 201910527572A CN 110111713 A CN110111713 A CN 110111713A
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- 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]
-
- 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]
- G09G3/3225—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] using an active matrix
- G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- 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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- 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
- G09G2320/0257—Reduction of after-image effects
Abstract
The present invention discloses the image retention method of discrimination, device, display equipment of a kind of display panel, is related to field of display technology, to determine the reason of display panel generates image retention.The image retention method of discrimination of the display panel includes: that the driving transistor in each pixel circuit for including carries out characterisitic parameter compensation, and obtains the driving signal for respectively driving transistor to generate after compensation to display panel；Obtain the display brightness information of compensated display panel；According to the driving signal and the display brightness information for respectively driving transistor to generate after compensation, the reason of display panel generates image retention is judged.The image retention method of discrimination of display panel provided by the invention is for differentiating the reason of display panel generates image retention.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of image retention method of discrimination of display panel, device, displays to set
It is standby.
Background technique
With the continuous development of display technology, people are higher and higher to the display quality requirement of display product.With organic hair
Optical diode (English: Organic Light-Emitting Diode；Hereinafter referred to as: OLED) for display panel, OLED is aobvious
Show panel include multiple pixel circuits and with the pixel circuit multiple luminescence units correspondingly, when practical application, by pixel
The corresponding luminescence unit of circuit drives shines, so that OLED display panel be made to realize display function.This OLED display panel exists
When realizing display function, it is possible to create image retention, and the producing cause of the image retention is varied, it is thus determined that image retention generation is specific
Reason, and image retention problem is effectively solved based on the reason, the display quality for improving display product is particularly important.
Summary of the invention
The purpose of the present invention is to provide a kind of image retention method of discrimination of display panel, device, display equipment, for determining
Display panel generates the reason of image retention.
To achieve the goals above, the invention provides the following technical scheme:
The first aspect of the present invention provides a kind of image retention method of discrimination of display panel, comprising:
Driving transistor in each pixel circuit for including to display panel carries out characterisitic parameter compensation, and after obtaining compensation
The driving signal that each driving transistor generates；
Obtain the display brightness information of compensated display panel；
According to the driving signal and the display brightness information for respectively driving transistor to generate after compensation, the display surface is judged
Plate generates the reason of image retention.
Optionally, described according to the driving signal and the display brightness information that respectively drive transistor to generate after compensation, sentence
The step of the reason of display panel that breaks generates image retention, specifically includes:
When it is compensated it is each driving transistor generate driving signal it is identical, and the display brightness information show display surface
When each luminescence unit display brightness of plate is all the same, judge that the reason of display panel generates image retention is brilliant to drive in each pixel circuit
The characterisitic parameter of body pipe is different, and the luminescence unit and the pixel circuit correspond.
Optionally, described according to the driving signal and the display brightness information that respectively drive transistor to generate after compensation, sentence
The step of the reason of display panel that breaks generates image retention, specifically includes:
When it is compensated it is each driving transistor generate driving signal it is identical, and the display brightness information show display surface
When each luminescence unit display brightness of plate is not identical, judge the reason of display panel generates image retention for each luminous list of display panel
The luminous efficiency of member is different, and the luminescence unit and the pixel circuit correspond.
Optionally, described according to the driving signal and the display brightness information that respectively drive transistor to generate after compensation, sentence
The step of the reason of display panel that breaks generates image retention, specifically includes:
When it is compensated it is each driving transistor generate driving signal it is not identical, and the display brightness information display display
When each luminescence unit display brightness of panel is not identical, the reason of display panel generates image retention is judged to drive in each pixel circuit
The characterisitic parameter of transistor is different；And/or judge the reason of display panel generates image retention for each luminescence unit of display panel
Luminous efficiency is different, and the luminescence unit and the pixel circuit correspond.
Optionally, when judge display panel generate image retention the reason of for the luminous efficiency of each luminescence unit of display panel not
Meanwhile the image retention method of discrimination further include:
Optical compensation is carried out to each luminescence unit for including in the display panel, so as to include in the display panel
The luminous efficiency of each luminescence unit is identical.
Optionally, the pixel circuit includes: input transistors, driving transistor, sensing transistor, the first storage electricity
Hold, the second storage capacitance；Wherein the grid of the input transistors and first control signal line couple, the input transistors
First pole and data signal line couple, and the second pole of the input transistors and the grid of driving transistor couple, the driving
First pole of transistor and power signal line couple, and the second pole of the driving transistor is coupled with corresponding luminescence unit, institute
The grid of the first end and the driving transistor of stating the first storage capacitance couples, the second end of first storage capacitance and institute
The second pole coupling of driving transistor is stated, the grid and second control signal line of the sensing transistor couple, and the sensing is brilliant
First pole of body pipe and the second pole of the driving transistor couple, the second pole of the sensing transistor and sensing signal line coupling
It connects；The first end and sensing signal line of second storage capacitance couple, the second end and earth signal of second storage capacitance
Line coupling；
Described the step of obtaining the driving signal for respectively driving transistor to generate after compensation, specifically includes:
Under the control of the first control signal inputted by the first control signal line, the input transistors conducting；
Under the control of the second control signal inputted by the second control signal line, the sensing transistor conducting；
By the data signal line input offset data-signal, controls the driving transistor turns and generate driving electricity
Stream, and be second storage capacitance charging using the driving current；
After charging complete, the voltage value of the second storage capacitance storage is sensed by the sensing signal line.
The second aspect of the present invention provides a kind of image retention discriminating gear of display panel, comprising:
Compensation obtains module, and the driving transistor in each pixel circuit for including to display panel carries out characterisitic parameter
Compensation, and obtain the driving signal for respectively driving transistor to generate after compensation；
The compensation obtains the display brightness information that module is also used to obtain compensated display panel；
Judgment module, for according to respectively driven after compensation transistor generate driving signal and the display brightness information,
Judge the reason of display panel generates image retention.
Optionally, the judgment module is specifically used for:
When it is compensated it is each driving transistor generate driving signal it is identical, and the display brightness information show display surface
When each luminescence unit display brightness of plate is all the same, judge that the reason of display panel generates image retention is brilliant to drive in each pixel circuit
The characterisitic parameter of body pipe is different, and the luminescence unit and the pixel circuit correspond.
Optionally, the judgment module is specifically used for:
When it is compensated it is each driving transistor generate driving signal it is identical, and the display brightness information show display surface
When each luminescence unit display brightness of plate is not identical, judge the reason of display panel generates image retention for each luminous list of display panel
The luminous efficiency of member is different, and the luminescence unit and the pixel circuit correspond.
Optionally, the judgment module is specifically used for:
When it is compensated it is each driving transistor generate driving signal it is not identical, and the display brightness information display display
When each luminescence unit display brightness of panel is not identical, the reason of display panel generates image retention is judged to drive in each pixel circuit
The characterisitic parameter of transistor is different；And/or judge the reason of display panel generates image retention for each luminescence unit of display panel
Luminous efficiency is different, and the luminescence unit and the pixel circuit correspond.
The technical solution of image retention discriminating gear based on above-mentioned display panel, the third aspect of the present invention provide a kind of display
Equipment, the image retention discriminating gear including above-mentioned display panel.
In technical solution provided by the invention, the spy for each driving transistor in pixel circuit for first including to display panel
Property parameter compensate, and the driving signal that compensated each driving transistor generates is obtained, according to each driving transistor production
Raw driving signal can determine the compensation situation to each driving transistor, i.e., the driving generated after each driving transistor compensation
When signal is all the same, illustrate that there is no driving differences after each driving transistor compensation, generate after each driving transistor compensation
When driving signal is not identical, illustrate that there is also driving differences after each driving transistor compensation；Meanwhile it can continue to obtain after compensation
The display brightness information of display panel can determine the display brightness situation of display panel after compensation according to the display brightness information；
Therefore, it can determine whether in conjunction with the display brightness information of display panel after the driving signal and compensation generated after each driving transistor compensation
Display panel, which generates the efficiency that the reason of image retention has differences still luminescence unit for the characterisitic parameter of each driving transistor, to be existed
Difference.
As it can be seen that technical solution provided by the invention can accurately differentiate the reason of display panel generates image retention, it is based on the original
Because can more effectively solve the image retention problem of display panel.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the image retention method of discrimination flow diagram of display panel provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 3 is the basic block diagram of display device provided in an embodiment of the present invention.
Specific embodiment
The image retention method of discrimination for the display panel that embodiment provides in order to further illustrate the present invention, device, display equipment,
It is described in detail with reference to the accompanying drawings of the specification.
By taking OLED display panel as an example, when OLED display panel works, display is driven by the pixel circuit in display panel
Luminescence unit in panel shines, to realize display function.In more detail, above-mentioned pixel circuit generally comprises driving crystal
Pipe generates driving current by driving transistor, and driving current drives luminescence unit to shine, but since display panel was making
Cheng Zhong is limited by manufacture craft, so that the characterisitic parameter for the driving transistor that each pixel circuit includes in display panel is deposited
In difference, and this species diversity is easy to influence the display brightness homogeneity of display panel, and display panel is caused to generate image retention.Separately
Outside, when making the luminescence unit in display panel, anode layer, organic light emitting material and the cathode being stacked generally are made
Layer, wherein the output electrode of anode layer and driving transistor couples, the driving current provided for receiving driving transistor.Equally
, it is influenced by technique and luminous material layer, there may be differences for the luminous efficiency for each luminescence unit for including in display panel
Different, this species diversity is equally easy to influence the display brightness homogeneity of display panel, and display panel is caused to generate image retention.
In addition, OLED display panel is during prolonged use, driven in pixel circuit transistor stability and
The factors such as the service life of luminescence unit are also easy to cause display panel to generate image retention.
It, can when actually solving image retention problem by above-mentioned analysis it is found that there are many reason of display panel generate image retention
It first determines the concrete reason for leading to image retention, then image retention problem is effectively solved based on the reason.
Please refer to Fig. 1-Fig. 3, the image retention method of discrimination of display panel provided in an embodiment of the present invention, comprising:
Step S101, the driving transistor in each pixel circuit for including to display panel carry out characterisitic parameter compensation, and
Obtain the driving signal for respectively driving transistor to generate after compensation；
Step S102 obtains the display brightness information of compensated display panel；
Step S103 judges to show according to the driving signal and display brightness information for respectively driving transistor to generate after compensation
Panel generates the reason of image retention.
Specifically, external compensation technology can be used, drive the characterisitic parameter of transistor in each pixel circuit by detecting,
Then offset data signal is input to driving transistor by the offset data signal after generating correction, realize to driving transistor
Characterisitic parameter compensate, it is caused aobvious so as to improve due to driving the characterisitic parameter of transistor different in each pixel circuit
Show the inconsistent problem of Display panel brightness.Driving transistor in each pixel circuit for including to display panel carries out characteristic
After parameter compensation, the driving signal for respectively driving transistor to generate after compensation is obtained.
After the driving transistor that each pixel circuit includes in display panel carries out characterisitic parameter compensation, display surface is controlled
Plate is in display state, obtains the display brightness information of display panel, and the brightness of the display brightness message reflection display panel is equal
One property.
After the display brightness information of the driving signal and display panel that respectively drive transistor to generate after obtaining compensation,
Can be generated according to each driving transistor whether driving signal consistent and the display panel of display brightness message reflection it is aobvious
Show brightness homogeneity, judges the reason of display panel generates image retention.
In the image retention method of discrimination of display panel provided in an embodiment of the present invention, the pixel circuit that first includes to display panel
In the characterisitic parameter of each driving transistor compensate, and obtain the driving signal that compensated each driving transistor generates,
It can determine the compensation situation to each driving transistor according to the driving signal that each driving transistor generates, i.e., when each driving is brilliant
When the driving signal generated after the compensation of body pipe is all the same, illustrate that there is no driving differences after each driving transistor compensation, when each drive
When the driving signal generated after dynamic transistor compensation is not identical, illustrate that there is also driving differences after each driving transistor compensation；Together
When, the display brightness information for obtaining display panel can be continued after compensation, shown after can determine compensation according to the display brightness information
Show the display brightness situation of panel；Therefore, in conjunction with display surface after the driving signal and compensation generated after each driving transistor compensation
The display brightness information of plate can determine whether that the reason of display panel generates image retention has differences for the characterisitic parameter of each driving transistor
Or the efficiency of luminescence unit has differences.
As it can be seen that the image retention method of discrimination of display panel provided in an embodiment of the present invention can accurately differentiate that display panel generates
The reason of image retention, can more effectively solve the image retention problem of display panel based on the reason.
In some embodiments, in above-mentioned steps S103, according to respectively driven after compensation transistor generate driving signal and
Display brightness information, judge display panel generate image retention the reason of the step of may particularly include:
When the driving signal that compensated each driving transistor generates is identical, and display brightness information shows display panel
When each luminescence unit display brightness is all the same, the reason of display panel generates image retention is judged to drive transistor in each pixel circuit
Characterisitic parameter it is different, luminescence unit and pixel circuit correspond.
Specifically, when the driving signal that compensated each driving transistor generates is identical, crystalline substance is respectively driven after illustrating compensation
The corresponding characterisitic parameter of body pipe is identical, each that transistor is driven accurately to be compensated, and in this case, display panel is in
Display state, when each luminescence unit display brightness of the display brightness information of acquisition display display panel is all the same, i.e., at this time
There is no image retention on display panel, it may be determined that display panel generates the reason of image retention to drive transistor in each pixel circuit before compensating
Characterisitic parameter it is different, that is, the characteristic of transistor is driven in the backboard that the reason of display panel generates image retention before compensating includes for it
Caused by parameter drift.
In other embodiments, in above-mentioned steps S103, believed according to the driving for respectively driving transistor to generate after compensation
Number and display brightness information, judge display panel generate image retention the reason of the step of may particularly include:
When the driving signal that compensated each driving transistor generates is identical, and display brightness information indicates display panel
When each luminescence unit display brightness is not identical, judge the reason of display panel generates image retention for each luminescence unit of display panel
Luminous efficiency is different, and luminescence unit and pixel circuit correspond.
Specifically, when the driving signal that compensated each driving transistor generates is identical, crystalline substance is respectively driven after illustrating compensation
The corresponding characterisitic parameter of body pipe is identical, each that transistor is driven accurately to be compensated, and each driving transistor can generate identical
Driving current flows through each luminescence unit, in this case, display panel is in display state, when the display brightness of acquisition
When information indicates that each luminescence unit display brightness of display panel is not identical, i.e., display panel generates image retention at this time, it may be determined that mends
It is different for the luminous efficiency of each luminescence unit of display panel to repay the reason of rear display panel generates image retention, and in display panel
The characterisitic parameter for the driving transistor that pixel circuit includes is unrelated.
In other embodiments, in above-mentioned steps S103, believed according to the driving for respectively driving transistor to generate after compensation
Number and display brightness information, judge display panel generate image retention the reason of the step of may particularly include:
When it is compensated it is each driving transistor generate driving signal it is not identical, and display brightness information show display panel
Each luminescence unit display brightness it is not identical when, judge the reason of display panel generates image retention to drive crystal in each pixel circuit
The characterisitic parameter of pipe is different；And/or judge the reason of display panel generates image retention shining for each luminescence unit of display panel
Efficiency is different, and luminescence unit and pixel circuit correspond.
Specifically, it when the driving signal that compensated each driving transistor generates is not identical, is respectively driven after illustrating compensation
The corresponding characterisitic parameter of transistor is different, each that transistor is driven not compensated accurately, in this case, at display panel
In display state, when acquisition display brightness information indicate display panel each luminescence unit display brightness it is not identical when, i.e., this
When display panel generate image retention, can determine whether display panel generate image retention the reason of in each pixel circuit drive transistor characteristic
Parameter is different；And/or judge display panel generate image retention the reason of for the luminous efficiency of each luminescence unit of display panel not
Together.
It is to be appreciated that theoretically after being compensated to each driving transistor, each driving signal for driving transistor to generate
It answers identical, if unequal, illustrates that each driving transistor is not compensated accurately, the elimination of image retention at this time and reason determine also
Need the promotion of external compensation ability；Moreover, in the case where this each driving transistor is not compensated accurately, display panel
Whether the reason of generating image retention should be related with the driving characterisitic parameter change of transistor, singly can not rule out luminous with luminescence unit
Efficiency is related.
In some embodiments, when judge display panel generate image retention the reason of for the hair of each luminescence unit of display panel
When light efficiency difference, the image retention method of discrimination further include:
Optical compensation is carried out to each luminescence unit for including in display panel, so that each luminous list for including in display panel
The luminous efficiency of member is identical.
Specifically, the light emission luminance J of luminescence unit meets following formula:
J=E × IoledFormula (1)
Wherein, E represents the luminous efficiency of luminescence unit, IoledRepresent the driving current that driving transistor generates.
When determining luminous efficiency difference of the reason of display panel generates image retention for luminescence unit, CCD camera can be passed through
(English: charge coupled device camera) takes pictures to the picture that display panel is shown, to acquire display surface
The current luminance information of plate, then according to the luminance information, by corresponding luminance compensation algorithm, to including in display panel
Each luminescence unit carries out the optical compensation of brightness domain, by the luminous efficiency compensation of luminescence unit each in display panel to consistent,
Keep the light emission luminance of each luminescence unit in display panel uniform.
It is to be appreciated that it is object brightness that above-mentioned luminance compensation algorithm, which generally presets some brightness, by all luminescence units
Brightness be corrected towards the object brightness so as to all have target when luminous bright for whole luminescence units in display panel
Degree.
As shown in Fig. 2, in some embodiments, pixel circuit provided by the above embodiment can include: input transistors T1,
Drive transistor DTFT, sensing transistor T2, the first storage capacitance C1, the second storage capacitance C2；Wherein input transistors T1
Grid and first control signal line Scan are coupled, and the first pole of input transistors T1 and data signal line DL are coupled, input crystal
The second pole of pipe T1 and the grid of driving transistor DTFT couple, and drive the first pole and the power signal line of transistor DTFT
ELVDD coupling, driving transistor DTFT the second pole coupled with corresponding luminescence unit, the first end of the first storage capacitance C1 and
The grid coupling of transistor DTFT is driven, the second end of the first storage capacitance C1 and the second pole of driving transistor DTFT couple,
The grid and second control signal line Sense of sensing transistor T2 couples, the first pole of sensing transistor T2 and driving transistor
The second pole of DTFT couples, and the second pole of sensing transistor T2 and sensing signal line SL are coupled；The first of second storage capacitance C2
End is coupled with sensing signal line SL, and the second end and earth signal line of the second storage capacitance C2 couples.
Pixel circuit provided by the above embodiment can also include: digital sampler ADC, for controlling digital sampler
The sampling switch SW whether ADC is electrically connected with sensing signal line SL.
When pixel circuit using the above structure when, driving transistor in the above-mentioned each pixel circuit for including to display panel
The step of DTFT progress characterisitic parameter compensation, specifically includes:
Input transistors T1 conducting, data letter are controlled by the first control signal inputted by first control signal line Scan
Data signal under test is written in number line DL, and data signal under test is transmitted to the grid G of driving transistor DTFT through input transistors T1,
The voltage for driving the grid G of transistor DTFT is become into Vg, the output electrode (i.e. source S) of driving transistor DTFT has initial
Change voltage V0；Sensing transistor T2 conducting is controlled by the second control signal inputted by second control signal line Sense, works as drive
When the grid of dynamic transistor DTFT and the voltage difference Vgs of source electrode are greater than the threshold voltage of driving transistor DTFT, transistor is driven
DTFT conducting, generates driving current Ioled, sensing transistor T2 is driven current through as the second storage capacitance C2 charging, and with
The source potential of the increase in charging time, driving transistor DTFT constantly increases, until driving transistor DTFT is in cut-off shape
The source potential of state, driving transistor DTFT no longer increases, and stops charging to the second storage capacitance C2；Pass through sensing signal at this time
The voltage Vs (i.e. sensing voltage) of the source electrode of line SL sensing driving transistor DTFT, then can obtain the threshold value of driving transistor DTFT
Voltage Vth=Vg-Vs.
Drive threshold voltage vt h, mobility K and the driving current I of transistor DTFToledMeet following formula:
Wherein, Cox is gate oxide capacitance, and W/L is the breadth length ratio for driving transistor DTFT channel region, and Vgs is that driving is brilliant
The gate source voltage of body pipe DTFT.From formula (2) it can be seen that K and Vth is to IoledTool has a certain impact.
Based on above-mentioned formula (2), after carrying out threshold voltage vt h compensation to driving transistor DTFT, after being compensated using Vth
Voltage charge in the set time to the second storage capacitance C2, the voltage value stored in the second obtained storage capacitance C2
(driving the source potential of transistor DTFT) is proportional with mobility K, to release migration using the source potential is counter
Rate K.
After the threshold voltage vt h and mobility K for obtaining driving transistor DTFT, compensated offset data letter can be obtained
Number Vdata, Vdata=F (Vth, K, GL), GL are the video source information of input, and offset data signal Vdata write driver is brilliant
The grid of body pipe DTFT is realized and carries out characterisitic parameter compensation to driving transistor DTFT.
In some embodiments, the step of driving signal for respectively driving transistor DTFT to generate after above-mentioned acquisition compensation, is specific
Include:
Under the control of the first control signal inputted by first control signal line Scan, input transistors T1 conducting；?
Under control by the second control signal of second control signal line Sense input, sensing transistor T2 conducting；
By data signal line DL input offset data-signal, control driving transistor DTFT conducting generates driving current,
And utilizing driving current is the second storage capacitance C2 charging；
After charging complete, the voltage value of the second storage capacitance C2 storage is sensed by sensing signal line SL.
Specifically, under the control of the first control signal inputted by first control signal line Scan, input transistors T1
Conducting, under the control of the second control signal inputted by second control signal line Sense, sensing transistor T2 conducting；Pass through
Data signal line DL input offset data-signal, offset data signal are transmitted to driving transistor DTFT by input transistors T1
Grid, control driving transistor DTFT conducting generate driving current, and using the driving current be the second storage capacitance C2 fill
Electricity；After to the second storage capacitance C2 charging complete, second control signal controls sensing transistor T2 cut-off, and sampling switch SW is closed
It closes, digital sampler ADC senses the voltage value of the second storage capacitance C2 storage by sensing signal line SL sensing transistor T2.
It is to be appreciated that working as the corresponding driving current I of each driving transistor DTFToledWhen identical, in the identical charging time
Interior, the voltage value of the second storage capacitance C2 storage is identical, therefore, what each driving transistor DTFT that above-described embodiment is mentioned was generated
Driving signal can be specially driving current IoledOr second storage capacitance C2 storage voltage value.
The embodiment of the invention also provides a kind of image retention discriminating gears of display panel, comprising:
Compensation obtains module, and the driving transistor in each pixel circuit for including to display panel carries out characterisitic parameter
Compensation, and obtain the driving signal for respectively driving transistor to generate after compensation；
Compensation obtains the display brightness information that module is also used to obtain compensated display panel；
Judgment module, for according to the driving signal and display brightness information for respectively driving transistor to generate after compensation, judgement
Display panel generates the reason of image retention.Specifically, compensation obtains module and drives transistor in each pixel circuit by detecting
Characterisitic parameter, the offset data signal after generating correction, is then input to driving transistor for offset data signal, realizes to drive
The characterisitic parameter of dynamic transistor compensates, different so as to improve the characterisitic parameter due to driving transistor in each pixel circuit,
The inconsistent problem of caused display panel display brightness.Driving transistor in each pixel circuit for including to display panel
After carrying out characterisitic parameter compensation, compensation obtains module and obtains the driving signal for respectively driving transistor to generate after compensation.To display
After the driving transistor that each pixel circuit includes in panel carries out characterisitic parameter compensation, control the display panel in display state,
Compensation obtains the display brightness information that module is also used to obtain display panel, the brightness of the display brightness message reflection display panel
Homogeneity.
After the display brightness information of the driving signal and display panel that respectively drive transistor to generate after obtaining compensation,
Judgment module can display whether consistent according to each driving signal for driving transistor to generate and display brightness message reflection
The display brightness homogeneity of panel judges the reason of display panel generates image retention.
In the image retention discriminating gear of display panel provided in an embodiment of the present invention, compensation obtains module first to display panel packet
The characterisitic parameter of each driving transistor in the pixel circuit included compensates, and obtains compensated each driving transistor and generate
Driving signal, according to this it is each driving transistor generate driving signal can determine to it is each driving transistor compensation situation,
When the driving signal generated after each driving transistor compensation is all the same, illustrate that there is no drivings after each driving transistor compensation
Difference, when the driving signal that generates is not identical after each driving transistor compensation, illustrate after each driving transistor compensates there is also
Drive difference；Meanwhile can continue to obtain the display brightness information of display panel in compensation post-compensation acquisition module, according to the display
Luminance information can determine the display brightness situation of display panel after compensation；Therefore, it is generated after being compensated in conjunction with each driving transistor
The display brightness information of display panel after driving signal and compensation, can determine whether that the reason of display panel generates image retention is brilliant for each driving
The characterisitic parameter of body pipe has differences or the efficiency of luminescence unit has differences.
As it can be seen that the image retention discriminating gear using display panel provided in an embodiment of the present invention can accurately differentiate display panel
The reason of generating image retention, the image retention problem of display panel can be more effectively solved based on the reason.
In more detail, as shown in Figures 2 and 3, above-mentioned compensation, which obtains module, may particularly include sequence controller 21, storage
Device 22, sensor 20, source electrode driver 24 and gate drivers 23 etc..Above-mentioned judgment module may particularly include processor.It is above-mentioned
Pixel circuit in display panel can include: input transistors T1, driving transistor DTFT, sensing transistor T2, the first storage
Capacitor C1, the second storage capacitance C2；Wherein the grid of input transistors T1 and first control signal line Scan are coupled, input crystal
The first pole of pipe T1 and data signal line DL are coupled, the second pole of input transistors T1 and the grid coupling of driving transistor DTFT
Connect, drive transistor DTFT the first pole and power signal line ELVDD couple, drive transistor DTFT the second pole with it is corresponding
The anode of luminescence unit OLED couples, the cathode and power cathode ELVSS of luminescence unit OLED, and the first of the first storage capacitance C1
End and the grid of driving transistor DTFT couple, the second end of the first storage capacitance C1 and the second pole coupling of driving transistor DTFT
It connects, the grid and second control signal line Sense of sensing transistor T2 couples, the first pole of sensing transistor T2 and driving crystal
The second pole of pipe DTFT couples, and the second pole of sensing transistor T2 and sensing signal line SL are coupled；The of second storage capacitance C2
One end and sensing signal line SL are coupled, and the second end and earth signal line of the second storage capacitance C2 couples.It is provided by the above embodiment
Pixel circuit can also include: digital sampler ADC, for controlling whether digital sampler ADC and sensing signal line SL is electrically connected
The sampling switch SW connect.
In the Blanking stage of display panel 25, (i.e. display panel 25 shows the period except picture, including in a frame
VFP (crop of frame synchronizing signal), VW (pulsewidth of frame synchronizing signal), VBP (back porch of frame synchronizing signal)；From starting-up signal
It is issued to normal pictures output, display panel 25 does sensor operation in this period) or the black picture interval of booting display,
Sequence controller 21 generates sensing data Data and source control signal SCS and exports to source electrode driver 24；Sequence controller 21
It generates grid control signal GCS to export to gate drivers 23, be obtained under the cooperation of gate drivers 23 and source electrode driver 24
Data Sdata must be sensed；According to sensing data Sdata, by data conversion, it is calculated offset data, and by the compensation
Data are stored in memory 22, in this way when using the offset data, are directly transferred from memory 22.
In the normal display stage of display panel, sequence controller 21 receives externally input RGB data and timing control
Signal Timing, and the ROM data (i.e. offset data) stored in memory 22 is read, sequence controller 21 generates offset data
Signal Data and source control signal SCS (Source Control Signal) output is to source electrode driver 24；Timing control simultaneously
Device 21 processed generates grid control signal GCS (Gate Control Signal) output and, to gate drivers 23, finally controls picture
Normal output.
It is noted that memory 22 is used to store the characteristic parameter (threshold for each driving transistor DTFT that display panel includes
Threshold voltage Vth and mobility K etc.), it is also used to store the optical compensation data (a, b) of each luminescence unit in display panel and each
Characteristic value (the threshold voltage V of luminescence unitoled) etc. information；Wherein optical compensation data (a, b) are used for the brightness of display panel
Compensation.
Sensor 20 can the information such as sense ambient temperature, the temperature of display panel, sensor 20 is to sequence controller 21
Transmit the temperature information data based on temperature change.
Source electrode driver 24 generates corresponding data for receiving offset data signal Data and source control signal SCS
Voltage is exported by data signal line DL to display panel；By the control of source electrode driver 24 and gate drivers 23, aobvious
The Blanking stage or booting shown show that black picture interval, source electrode driver 24 are brilliant by sensing signal line SL sensing driving
The electrical characteristic value of body pipe DTFT generates corresponding sensing data Sdata by source electrode driver 24 and exports to sequence controller
21。
Gate drivers 23 receive grid control signal GCS, generate corresponding first control signal and second control signal,
Corresponding first control in display panel is transmitted to by corresponding first control signal line Scan and second control signal line Sense
Signal input part processed and second control signal input terminal.
In some embodiments, judgment module provided by the above embodiment is specifically used for:
When it is compensated it is each driving transistor DTFT generate driving signal it is identical, and display brightness information show display surface
When each luminescence unit display brightness of plate is all the same, judge that the reason of display panel generates image retention is brilliant to drive in each pixel circuit
The characterisitic parameter of body pipe DTFT is different, and luminescence unit and pixel circuit correspond.
Specifically, it when the driving signal that compensated each driving transistor DTFT is generated is identical, is respectively driven after illustrating compensation
The dynamic corresponding characterisitic parameter of transistor DTFT is identical, each that transistor DTFT is driven accurately to be compensated, in this case, will
Display panel is in display state, when the display brightness information of acquisition shows that each luminescence unit display brightness of display panel is homogeneous
Meanwhile there is no image retention on display panel at this time, it may be determined that it is each pixel circuit that display panel, which generates the reason of image retention, before compensating
In the backboard that the reason of characterisitic parameter of middle driving transistor DTFT is different, that is, display panel generates image retention before compensating include for it
Caused by driving the characterisitic parameter drift of transistor DTFT.
In some embodiments, judgment module provided by the above embodiment is specifically used for:
When it is compensated it is each driving transistor DTFT generate driving signal it is identical, and display brightness information show display surface
When each luminescence unit display brightness of plate is not identical, judge the reason of display panel generates image retention for each luminous list of display panel
The luminous efficiency of member is different, and luminescence unit and pixel circuit correspond.
Specifically, it when the driving signal that compensated each driving transistor DTFT is generated is identical, is respectively driven after illustrating compensation
The dynamic corresponding characterisitic parameter of transistor DTFT is identical, each that transistor DTFT is driven accurately to be compensated, and respectively drives transistor
DTFT can generate identical driving current to flow through each luminescence unit, in this case, display panel is in display shape
State, when the display brightness information of acquisition indicate display panel each luminescence unit display brightness it is not identical when, i.e. display surface at this time
Plate generates image retention, it may be determined that display panel generates the reason of image retention as the luminous efficiency of each luminescence unit of display panel after compensation
Difference, and it is unrelated with the driving characterisitic parameter of transistor DTFT that pixel circuit in display panel includes.
In some embodiments, judgment module provided by the above embodiment is specifically used for:
When it is compensated it is each driving transistor DTFT generate driving signal it is not identical, and display brightness information display display
When each luminescence unit display brightness of panel is not identical, the reason of display panel generates image retention is judged to drive in each pixel circuit
The characterisitic parameter of transistor DTFT is different；And/or judge the reason of display panel generates image retention for each luminous list of display panel
The luminous efficiency of member is different, and luminescence unit and pixel circuit correspond.
Specifically, when the driving signal that compensated each driving transistor DTFT is generated is not identical, illustrate each after compensating
Drive the corresponding characterisitic parameter of transistor DTFT different, it is each that transistor DTFT is driven not compensated accurately, in this case,
Display panel is in display state, when the display brightness information of acquisition indicates each luminescence unit display brightness of display panel not
When identical, i.e., display panel generates image retention at this time, can determine whether the reason of display panel generates image retention to drive in each pixel circuit
The characterisitic parameter of transistor DTFT is different；And/or judge the reason of display panel generates image retention for each luminous list of display panel
The luminous efficiency of member is different.
It is to be appreciated that theoretically after being compensated to each driving transistor DTFT, it is each that transistor DTFT is driven to generate
Driving signal is answered identical, if unequal, illustrates that each driving transistor DTFT is not compensated accurately, the elimination of image retention at this time
The promotion for also needing external compensation ability is determined with reason；Moreover, not compensated accurately in this each driving transistor DTFT
In the case where, display panel generate image retention the reason of should with driving the characterisitic parameter change of transistor DTFT it is related, cannot singly arrange
Except whether related with the luminous efficiency of luminescence unit.
In some embodiments, compensation acquisition module provided by the above embodiment is also used to each to include in display panel
Luminescence unit carries out optical compensation, so that the luminous efficiency for each luminescence unit for including in display panel is identical.
The embodiment of the invention also provides a kind of display equipment, the image retention including display panel provided by the above embodiment is sentenced
Other device.
Since the image retention discriminating gear of display panel provided by the above embodiment can accurately differentiate that display panel generation is residual
The reason of picture, and the image retention problem of display panel can be more effectively solved based on the reason, it is therefore, provided in an embodiment of the present invention
Show that equipment when including the image retention discriminating gear of above-mentioned display panel, is equally had that effect.
It should be noted that the display equipment can be with are as follows: TV, display, Digital Frame, mobile phone, tablet computer etc.
Any products or components having a display function.
It is to be appreciated that all the embodiments in this specification are described in a progressive manner, phase between each embodiment
It may refer to each other with similar part, each embodiment focuses on the differences from other embodiments.In particular,
For product embodiments, since it is substantially similar to the method embodiment, so describe fairly simple, related place referring to
The part of product embodiments illustrates.
Unless otherwise defined, the technical term or scientific term that the disclosure uses should be tool in fields of the present invention
The ordinary meaning for thering is the personage of general technical ability to be understood." first ", " second " used in the disclosure and similar word are simultaneously
Any sequence, quantity or importance are not indicated, and are used only to distinguish different component parts." comprising " or "comprising" etc.
Similar word means that the element or object before the word occur covers the element or object for appearing in the word presented hereinafter
And its it is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " is not limited to physics
Or mechanical connection, but may include electrical connection, it is either direct or indirectly."upper", "lower",
"left", "right" etc. is only used for indicating relative positional relationship, and after the absolute position for being described object changes, then the relative position is closed
System may also correspondingly change.
It is appreciated that ought such as layer, film, region or substrate etc element be referred to as positioned at another element " upper " or " under "
When, which can be located at another element with " direct " " on " or " under ", or may exist intermediary element.
In the description of above embodiment, particular features, structures, materials, or characteristics can be at any one or more
It can be combined in any suitable manner in a embodiment or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
1. a kind of image retention method of discrimination of display panel characterized by comprising
Driving transistor in each pixel circuit for including to display panel carries out characterisitic parameter compensation, and respectively drives after obtaining compensation
The driving signal that dynamic transistor generates；
Obtain the display brightness information of compensated display panel；
According to the driving signal and the display brightness information for respectively driving transistor to generate after compensation, judge that the display panel produces
The reason of raw image retention.
2. the image retention method of discrimination of display panel according to claim 1, which is characterized in that described respectively to be driven according to after compensation
The step of moving driving signal and the display brightness information that transistor generates, judging the reason of display panel generates image retention
It specifically includes:
When the driving signal that compensated each driving transistor generates is identical, and the display brightness information shows display panel
When each luminescence unit display brightness is all the same, the reason of display panel generates image retention is judged to drive transistor in each pixel circuit
Characterisitic parameter it is different, the luminescence unit and the pixel circuit correspond.
3. the image retention method of discrimination of display panel according to claim 1, which is characterized in that described respectively to be driven according to after compensation
The step of moving driving signal and the display brightness information that transistor generates, judging the reason of display panel generates image retention
It specifically includes:
When the driving signal that compensated each driving transistor generates is identical, and the display brightness information shows display panel
When each luminescence unit display brightness is not identical, judge the reason of display panel generates image retention for each luminescence unit of display panel
Luminous efficiency is different, and the luminescence unit and the pixel circuit correspond.
4. the image retention method of discrimination of display panel according to claim 1, which is characterized in that described respectively to be driven according to after compensation
The step of moving driving signal and the display brightness information that transistor generates, judging the reason of display panel generates image retention
It specifically includes:
When it is compensated it is each driving transistor generate driving signal it is not identical, and the display brightness information show display panel
Each luminescence unit display brightness it is not identical when, judge the reason of display panel generates image retention to drive crystal in each pixel circuit
The characterisitic parameter of pipe is different；And/or judge the reason of display panel generates image retention shining for each luminescence unit of display panel
Efficiency is different, and the luminescence unit and the pixel circuit correspond.
5. the image retention method of discrimination of display panel according to claim 3 or 4, which is characterized in that when judging display panel
Generate image retention the reason of for each luminescence unit of display panel luminous efficiency difference when, the image retention method of discrimination further include:
Optical compensation is carried out to each luminescence unit for including in the display panel, so that each hair for including in the display panel
The luminous efficiency of light unit is identical.
6. the image retention method of discrimination of display panel according to claim 1, which is characterized in that the pixel circuit includes:
Input transistors, driving transistor, sensing transistor, the first storage capacitance, the second storage capacitance；The wherein input transistors
Grid and first control signal line couple, the first pole of the input transistors and data signal line couple, the input crystalline substance
Second pole of body pipe and the grid of driving transistor couple, and the first pole of the driving transistor and power signal line couple, institute
The second pole for stating driving transistor is coupled with corresponding luminescence unit, and the first end of first storage capacitance and the driving are brilliant
The grid of body pipe couples, and the second pole of the second end of first storage capacitance and the driving transistor couples, the sensing
The grid and second control signal line of transistor couple, the first pole of the sensing transistor and the second of the driving transistor
Pole coupling, the second pole of the sensing transistor and sensing signal line couple；The first end and sensing of second storage capacitance
Signal wire coupling, the second end and earth signal line of second storage capacitance couple；
Described the step of obtaining the driving signal for respectively driving transistor to generate after compensation, specifically includes:
Under the control of the first control signal inputted by the first control signal line, the input transistors conducting；By
Under the control of the second control signal of the second control signal line input, the sensing transistor conducting；
By the data signal line input offset data-signal, controls the driving transistor turns and generate driving current, and
It is second storage capacitance charging using the driving current；
After charging complete, the voltage value of the second storage capacitance storage is sensed by the sensing signal line.
7. a kind of image retention discriminating gear of display panel characterized by comprising
Compensation obtains module, and the driving transistor in each pixel circuit for including to display panel carries out characterisitic parameter benefit
It repays, and obtains the driving signal for respectively driving transistor to generate after compensation；
The compensation obtains the display brightness information that module is also used to obtain compensated display panel；
Judgment module, for according to the driving signal and the display brightness information for respectively driving transistor to generate after compensation, judgement
The display panel generates the reason of image retention.
8. the image retention discriminating gear of display panel according to claim 7, which is characterized in that the judgment module is specifically used
In:
When the driving signal that compensated each driving transistor generates is identical, and the display brightness information shows display panel
When each luminescence unit display brightness is all the same, the reason of display panel generates image retention is judged to drive transistor in each pixel circuit
Characterisitic parameter it is different, the luminescence unit and the pixel circuit correspond.
9. the image retention discriminating gear of display panel according to claim 7, which is characterized in that the judgment module is specifically used
In:
When the driving signal that compensated each driving transistor generates is identical, and the display brightness information shows display panel
When each luminescence unit display brightness is not identical, judge the reason of display panel generates image retention for each luminescence unit of display panel
Luminous efficiency is different, and the luminescence unit and the pixel circuit correspond.
10. the image retention discriminating gear of display panel according to claim 7, which is characterized in that the judgment module is specific
For:
When it is compensated it is each driving transistor generate driving signal it is not identical, and the display brightness information show display panel
Each luminescence unit display brightness it is not identical when, judge the reason of display panel generates image retention to drive crystal in each pixel circuit
The characterisitic parameter of pipe is different；And/or judge the reason of display panel generates image retention shining for each luminescence unit of display panel
Efficiency is different, and the luminescence unit and the pixel circuit correspond.
11. a kind of display equipment, which is characterized in that including the residual of the display panel as described in any one of claim 7~10
As discriminating gear.
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