CN110364114A - Display panel and its luminance compensation method, display device - Google Patents
Display panel and its luminance compensation method, display device Download PDFInfo
- Publication number
- CN110364114A CN110364114A CN201910654346.6A CN201910654346A CN110364114A CN 110364114 A CN110364114 A CN 110364114A CN 201910654346 A CN201910654346 A CN 201910654346A CN 110364114 A CN110364114 A CN 110364114A
- Authority
- CN
- China
- Prior art keywords
- light
- transistor
- node
- emitting component
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
The embodiment of the invention provides a kind of display panel and its luminance compensation methods, display device, are related to field of display technology, improve brightness decay caused by aging.Display panel includes viewing area and non-display area, and viewing area is equipped with the first light-emitting component；Light sensation detection unit, the second light-emitting component and detection module including non-display area；Second light-emitting component is identical as the first light-emitting component luminance；Detection module includes: initialization submodule, is connect with first control signal end, the first reference signal end, high level signal end, first node and second node；Photosensitive element is connect with the first fixed signal end and first node；Submodule is fed back, is connect with second control signal end, the second reference signal end, the first fixed signal end, the second fixed signal end, first node, second node and third node；Output sub-module is connect with second control signal end, third node and output signal line；Compensating unit is connect with output sub-module and the first light-emitting component.
Description
[technical field]
The present invention relates to field of display technology more particularly to a kind of display panels and its luminance compensation method, display device.
[background technique]
For liquid crystal display panel, Organic Light Emitting Diode (Organic Light-Emitting Diode, letter
Claiming OLED) display panel in brightness, coloration and power consumption has more advantage, it is widely applied.But when with using
Between passage, the light-emitting component in OLED display panel can occur aging, cause its practical display brightness to show lower than target bright
Degree, and then picture shown by display panel is caused colour cast occur.
However, such as real time monitoring compensation and predictive compensation, the accuracy of compensation is not using compensation way in the prior art
Height can not preferably promote display performance.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of display panel and its luminance compensation method, display device, it can
Light-emitting component is accurately compensated, brightness decay caused by improving because of light-emitting component aging improves display performance.
On the one hand, the embodiment of the invention provides a kind of display panels, comprising:
Viewing area and non-display area around the viewing area are equipped with the first light-emitting component in the viewing area；
At least one light sensation detection unit, the light sensation detection unit include the second light-emitting component and detection module；Wherein,
Second light-emitting component is located at the non-display area, the luminance of second light-emitting component and first light-emitting component
It is identical；
The detection module includes initialization submodule, photosensitive element, feedback submodule and output sub-module；
The initialization submodule respectively with first control signal end, the first reference signal end, high level signal end, first
Node and second node electrical connection, for providing the first reference signal to the first node, Xiang Suoshu second node provides high
Level signal；
The photosensitive element is electrically connected with the first fixed signal end and the first node respectively, for sensing described second
The optical signal of light-emitting component, and the photo-signal converted by the optical signal is transmitted to the first node；
The feedback submodule respectively with second control signal end, the second reference signal end, first fixed signal end,
Second fixed signal end, the first node, the second node and the electrical connection of third node, for by the first node
Voltage signal feeds back to the third node；
The output sub-module is electrically connected with the second control signal end, the third node and output signal line respectively
It connects, for the voltage signal of the third node to be transmitted to the output signal line；
Compensating unit, the compensating unit are electrically connected with the output sub-module and first light-emitting component respectively, are used
Thermal compensation signal is obtained in the voltage signal exported according to the output sub-module, is shone according to the thermal compensation signal to described first
The light emission luminance of element compensates.
Optionally, the viewing area includes n sub-viewing areas, and the display panel includes that the n light sensation detections are single
Member, n are the positive integer greater than 1；
Second light-emitting component in one light sensation detection unit with it is described in a sub-viewing areas
The luminance of first light-emitting component is identical.
On the other hand, the embodiment of the invention provides a kind of luminance compensation methods of display panel, are applied to above-mentioned display
Panel, comprising:
It controls second light-emitting component to shine, makes the luminance phase of its luminance with first light-emitting component
Together；
The initialization submodule of first stage, the light sensation detection unit provide described first to the first node
Reference signal, Xiang Suoshu second node provide the high level signal；
Second stage, the optical signal of the second light-emitting component described in the photosensitive elements sense, and will be turned by the optical signal
The photo-signal changed is transmitted to the first node；
The voltage signal of the first node is fed back to the third node, institute by phase III, the feedback submodule
It states output sub-module and the voltage signal of the third node is transmitted to the output signal line；
Fourth stage, the compensating unit obtain thermal compensation signal, root according to the voltage signal that the output sub-module exports
It is compensated according to light emission luminance of the thermal compensation signal to first light-emitting component.
In another aspect, the embodiment of the invention provides a kind of display devices, which is characterized in that including above-mentioned display panel.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
In the technical solution provided by the embodiment of the present invention, by the way that the second light-emitting component is arranged in non-display area, and
It enables the luminance of the second light-emitting component identical as the first light-emitting component, can guarantee the degree of aging and of the second light-emitting component
The degree of aging of one light-emitting component is consistent, and then is detected by the light emission luminance to the second light-emitting component, can be accurately anti-
Feed out the brightness decay degree of the first light-emitting component.So set, light of the photosensitive element without directly detecting the first light-emitting component
By force, the light that the first light-emitting component is issued need to only be projected via the light-emitting surface of display panel, without passing along other directions
Photosensitive element is transported to, thus also just without changing the structure of the first light-emitting component, such as by the anode layer of its second light-emitting component
Be set as transparent anode layer, the light emission luminance of the second light-emitting component detected, just without to the first light emitting element structure into
Row changes, and then avoids illumination and impact to the first light-emitting component itself and peripheral circuit, ensure that the first luminous member
The normal luminous of part.Also, the working principle based on detection module is detected in the light emission luminance to the second light-emitting component
When, the size of the voltage signal of first node can accurate feedback go out the second light-emitting component light emission luminance height, and first
The size of the voltage signal of node can be come out again by the voltage signal accurate feedback of third node, therefore, work as compensating unit
After the voltage signal for knowing third node, it will be able to be accurately judged to the brightness decay of the second light-emitting component (the first light-emitting component)
Degree, and then the first light-emitting component is accurately compensated, brightness decay caused by improving because of the first light-emitting component aging makes it
Displaying target brightness value improves the display performance of display panel.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the top view of display panel provided by the embodiment of the present invention；
Fig. 2 is the partial sectional view of display panel provided by the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of detection module provided by the embodiment of the present invention；
Fig. 4 is another top view of display panel provided by the embodiment of the present invention；
Fig. 5 is another partial sectional view of display panel provided by the embodiment of the present invention；
Fig. 6 is signal timing diagram provided by the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of compensating unit provided by the embodiment of the present invention；
Fig. 8 is the flow chart of luminance compensation method provided by the embodiment of the present invention；
Fig. 9 is another flow chart of luminance compensation method provided by the embodiment of the present invention；
Figure 10 is the structural schematic diagram of display device provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
The embodiment of the invention provides a kind of display panels, and as shown in FIG. 1 to 3, Fig. 1 is provided by the embodiment of the present invention
Display panel top view, Fig. 2 be the embodiment of the present invention provided by display panel partial sectional view, Fig. 3 be the present invention
The structural schematic diagram of detection module provided by embodiment, the display panel include viewing area 1 and around the non-display of viewing area 1
Area 2, viewing area 1 is interior to be equipped with the first light-emitting component 3.Display panel further includes at least one light sensation detection unit 4, and light sensation detection is single
Member 4 includes the second light-emitting component 5 and detection module 6；Wherein, the second light-emitting component 5 is located at non-display area 2, the second light-emitting component 5
It is identical as the luminance of the first light-emitting component 3.
Detection module 6 includes initialization submodule 7, photosensitive element 8, feedback submodule 9 and output sub-module 10.Wherein,
Initialization submodule 7 respectively with first control signal end Vck1, the first reference signal end Vref1, high level signal end VGH,
One node N1 and second node N2 electrical connection is provided for providing the first reference signal to first node N1 to second node N2
High level signal；Photosensitive element 8 is electrically connected with the first fixed signal end VDD and first node N1 respectively, for sensing the second hair
The optical signal of optical element 5, and the photo-signal converted by optical signal is transmitted to first node N1；Submodule 9 is fed back to distinguish
With second control signal end Vck2, the second reference signal end Vref2, the first fixed signal end VDD, the second fixed signal end VEE,
First node N1, second node N2 and third node N3 electrical connection, for the voltage signal of first node N1 to be fed back to third
Node N3；Output sub-module 10 is electrically connected with second control signal end Vck2, third node N3 and output signal line OL respectively, is used
In the voltage signal of third node N3 is transmitted to output signal line OL.
Display panel further includes compensating unit 11, compensating unit 11 respectively with output sub-module 10 and the first light-emitting component 3
Electrical connection, the voltage signal for being exported according to output sub-module 10 obtain thermal compensation signal, are shone according to thermal compensation signal to first
The light emission luminance of element 3 compensates.
Specifically, when display panel shows picture, control viewing area 1 the first light-emitting component 3 and non-display area 2 the
Two light emitting 5 shines, and enables the luminance of the second light-emitting component 5 identical as the luminance of the first light-emitting component 3.
In the first stage, the first reference signal write-in that initialization submodule 7 provides the first reference signal end Vref1 the
One node N1, meanwhile, second node N2 is written in the high level signal that high level signal end VGH is provided, and realizes to first node
The initialization of the current potential of N1 and second node N2.
In second stage, photosensitive element 8 senses the optical signal of the second light-emitting component 5, and the optical signal sensed is converted
For photo-signal, which flow to first node N1, increases the current potential of first node N1.Wherein, photoelectric current is believed
Number size it is related with the light emission luminance of the second light-emitting component 5, the light emission luminance of the second light-emitting component 5 is higher, photo-signal
Bigger, the elevated-levels of first node N1 current potential are also bigger.
The voltage signal of third node N3 is controlled with the electricity of first node N1 by feeding back submodule 9 in the phase III
It presses the raising of signal and increases, and then believed according to the voltage that the size of the voltage signal of third node N3 feeds back first node N1 out
Number size.
In fourth stage, compensating unit 11 knows the second light-emitting component 5 according to the size of the voltage signal of third node N3
Light emission luminance, and then know the brightness decay degree of the second light-emitting component 5 (the first light-emitting component 3), and then further according to brightness
Attenuation degree obtains thermal compensation signal, compensates to the first light-emitting component 3, makes the practical light emission luminance etc. of the first light-emitting component 3
In target light emission luminance.
As it can be seen that in the display panel provided by the embodiment of the present invention, by the way that the second light-emitting component is arranged in non-display area 2
5, and enable the luminance of the second light-emitting component 5 identical as the first light-emitting component 3, it can guarantee the old of the second light-emitting component 5
Change degree is consistent with the degree of aging of the first light-emitting component 3, and then is examined by the light emission luminance to the second light-emitting component 5
Survey, can accurate feedback go out the brightness decay degree of the first light-emitting component 3.So set, photosensitive element 8 is without directly detecting the
The light intensity of one light-emitting component 3, the light that the first light-emitting component 3 is issued need to only be projected via the light-emitting surface of display panel,
Without being transmitted to photosensitive element 8 along other directions, thus also just without changing the structure of the first light-emitting component 3, such as by second
The anode layer of light-emitting component 5 is set as transparent anode layer, detects to the light emission luminance of the second light-emitting component, just without to the
One light emitting element structure is changed, and then is avoided illumination and impacted to the first light-emitting component 3 itself and peripheral circuit,
It ensure that the normal luminous of the first light-emitting component 3；Meanwhile first is reacted by the light emission luminance of the second light-emitting component 5 of detection
The light emission luminance of light-emitting component 3 has higher detection accuracy compared to direct detection 3 brightness of the first light-emitting component, and first shines
The luminous of element 3 is mainly used for showing, can only be most of hair if directly detecting to 3 light emission luminance of the first light-emitting component
Light is used to show and small part shines for detecting, and first when shining to identical with 3 light emission luminance of the first light-emitting component second
When part 5 carries out light emission luminance detection, shining for the second light-emitting component 5 can be entirely used for detecting, at this time photosensitive element detection light
It is bright more, the light emission luminance of detection light-emitting component that can be more accurate.Also, based on the working principle of detection module 6, to
When the light emission luminance of two light emitting 5 is detected, the size of the voltage signal of first node N1 can accurate feedback go out second
The height of the light emission luminance of light-emitting component 5, and the size of the voltage signal of first node N1 can pass through third node N3's
Voltage signal accurate feedback comes out, therefore, after compensating unit 11 knows the voltage signal of third node N3, it will be able to accurately sentence
The brightness decay degree of disconnected second light-emitting component 5 (the first light-emitting component 3) out, and then the first light-emitting component 3 is accurately mended
It repays, brightness decay caused by improving because of 3 aging of the first light-emitting component makes its displaying target brightness value, improves the aobvious of display panel
Show performance.
It is understood that picture shown by different zones is different, that is, no in picture shown by display panel
, display brightness difference different with the display cycle of first light-emitting component 3 in region, attenuation degree are also just different.Based on this, such as scheme
Shown in 4, Fig. 4 is another top view of display panel provided by the embodiment of the present invention, and viewing area 1 includes n sub- viewing areas
Domain 12, display panel include n light sensation detection unit 4, and n is the positive integer greater than 1；Second in one light sensation detection unit 4
Light-emitting component 5 is identical as the luminance of the first light-emitting component 3 in a sub-viewing areas 12.That is, n son display
Region 12 and n light sensation detection unit 4 one-to-one correspondence, the second light-emitting component 5 in each light sensation detection unit 4 and corresponding
Sub-viewing areas 12 in the first light-emitting component 3 luminance it is identical.So set, can be to each sub-viewing areas 12
In the brightness decay degree of the first light-emitting component 3 individually detected, and then to the first hair in different sub-viewing areas 12
Optical element 3 carries out separate compensation, improves the accuracy of detection and compensation, makes the first light-emitting component 3 of 1 different zones of viewing area
It can show its target brightness value, further improve display effect.
It is understood that viewing area 1 includes the first luminous member of multiple color to realize that the picture of multiple color is shown
Part 3.Based on this, the second light-emitting component 5 of each light sensation detection unit 4 including multiple color, in a light sensation detection unit 4
Second light-emitting component 5 is identical as the luminance of the first light-emitting component 3 of same color.
Illustratively, the first light-emitting component 3 includes red first light-emitting component 3, green first light-emitting component 3 and blue the
One light-emitting component 3, correspondingly, each light sensation detection unit 4 includes red second light-emitting component 5,5 and of green second light-emitting component
Blue second light-emitting component 5, wherein the luminous shape of the luminance of red second light-emitting component 5 and red first light-emitting component 3
State is identical, and the luminance of green second light-emitting component 5 is identical as the green luminance of first light-emitting component 3, blue second
The luminance of light-emitting component 5 is identical as the blue luminance of first light-emitting component 3.Due to the light-emitting component of different colours
The material properties of luminescent layer are different, and rate of decay is not also identical, therefore, enable first hair of second light-emitting component 5 with same color
The luminance of optical element 3 is identical, can individually be examined to the brightness decay degree of the first light-emitting component 3 of different colours
It surveys, improves detection accuracy.
In addition, referring again to Fig. 4, n sub-viewing areas 12 and n are a to further increase detection and compensation accuracy
Light sensation detection unit 4 corresponds, and each light sensation detection unit 4 includes the second light-emitting component 5 of multiple color, a light sensation inspection
Survey the hair of the first light-emitting component 3 of same color in the second light-emitting component 5 in unit 4 and corresponding sub-viewing areas 12
Light state is identical.
Optionally, referring again to Fig. 2, the second light-emitting component 5 includes cathode layer 13, luminescent layer 14 and transparent anode layer
15.When the anode layer of the second light-emitting component 5 is transparent anode layer 15, the light that luminescent layer 14 issues can be sent out along different directions
It dissipates, guarantees that photosensitive element 8 receives sufficient amount of light, realize the inspection more accurate to 5 luminous intensity of the second light-emitting component
It surveys.
Optionally, referring again to Fig. 2, photosensitive element 8 is located at the second light-emitting component 5 backwards to the one of display panel light-emitting surface
Side.In the film layer structure of display panel, film layer where film layer where circuit is usually located at light-emitting component goes out backwards to display panel
The second light-emitting component 5 is arranged in backwards to the side of light-emitting surface in photosensitive element 8 by the side of smooth surface, can reduce photosensitive element 8 with
The distance of detection module 6 reduces part connection to reduce the connection track lengths between photosensitive element 8 and detection module 6
Cabling the space occupied in non-display area 2.
It should be noted that photosensitive element 8 may also be arranged on the second luminous member in the other optional embodiments of the present invention
Part 5 specifically can be used plug-in mode and be arranged on a display panel towards the side of display panel light-emitting surface.
Optionally, as shown in figure 5, Fig. 5 is another partial sectional view of display panel provided by the embodiment of the present invention,
Display panel further includes light shield layer 16, light shield layer 16 be located at the second light-emitting component 5 towards display panel light-emitting surface side.Benefit
It is blocked with the light that light shield layer 16 issues the second light-emitting component 5, it can be to avoid some light to the first light-emitting component 3
The light of injection interferes, and influences normally to show.Simultaneously as the setting of light shield layer 16, the aforementioned setting of photosensitive element 8 is the
Two light emitting 5 backwards to light-emitting surface side or the second light-emitting component 5 is set towards the side of display panel light-emitting surface all
There will not be interference to normal display, so the specific location of photosensitive element 8 can be arranged according to actual needs, the present invention is not
It is defined in this.
Optionally, referring again to Fig. 3, initialization submodule 7 includes the first transistor T1 and second transistor T2；Its
In, the grid of the first transistor T1 is electrically connected with first control signal end Vck1, the first pole of the first transistor T1 and the first ginseng
Signal end Vref1 electrical connection is examined, the second pole of the first transistor T1 is electrically connected with first node N1；The grid of second transistor T2
It is electrically connected with first control signal end Vck1, the first pole of second transistor T2 is electrically connected with high level signal end VGH, and second is brilliant
The second pole of body pipe T2 is electrically connected with second node N2.
In conjunction with Fig. 6, Fig. 6 is signal timing diagram provided by the embodiment of the present invention, in the first stage t1, first control signal
The first control signal for holding Vck1 to provide is low level, and the first transistor T1 and second transistor T2 are led under the action of low level
Logical, the first reference signal that the first reference signal end Vref1 is provided is transmitted to first node via the first transistor T1 of conducting
The high level signal that N1, high level signal end VGH are provided is transmitted to second node N2 via the second transistor T2 of conducting, to the
The current potential of one node N1 and second node N2 initializes.
Optionally, referring again to Fig. 3, feeding back submodule 9 includes that third transistor T3, the 4th transistor T4 and the 5th are brilliant
Body pipe T5；Wherein, the grid of third transistor T3 is electrically connected with second control signal end Vck2, the first pole of third transistor T3
It is electrically connected with the second reference signal end Vref2, the second pole of third transistor T3 is electrically connected with second node N2；4th transistor
The grid of T4 is electrically connected with second node N2, and the first pole of the 4th transistor T4 is electrically connected with the first fixed signal end VDD, and the 4th
The second pole of transistor T4 is electrically connected with third node N3；5th transistor T5, the grid and first node of the 5th transistor T5
N1 electrical connection, the first pole of the 5th transistor T5 are electrically connected with third node N3, and the second pole of the 5th transistor T5 is solid with second
Determine signal end VEE electrical connection.
In conjunction with Fig. 6, in phase III t3, the second control signal that second control signal end Vck2 is provided is low level, the
Three transistor T3 are connected under the action of low level, and the second reference signal that the second reference signal end Vref2 is provided is via conducting
Third transistor T3 be transmitted to second node N2, the 4th transistor T4 is provided in the second reference signal and the first fixed potential end
Fixation electric potential signal under the action of be in saturation region, drain saturation current I=(1/2) μ of the 4th transistor T4nCox(W4/L4)
(Vref2-VDD-Vth)2, μnFor electron mobility, CoxFor unit area gate oxide capacitance, W4/L4For the width of the 4th transistor T4
Long ratio, Vref2For the second reference signal, VDDFor the first fixed signal, VthFor threshold voltage, at this point, drain saturation current I and third
The voltage signal of node N3 is unrelated, only related with the second reference signal, the first fixed signal, and drain saturation current I is a fixed value,
4th transistor T4 can be considered constant-current source.The drain saturation current I of 4th transistor T4 is transmitted to the 5th transistor T5, in photoelectric current
Under the action of signal, the voltage signal of first node N1 is gradually risen, so that the on state of the 5th transistor T5 is gradually reduced,
At this point, the 5th transistor T5 can be considered source follower, the source voltage (voltage signal of third node N3 of the 5th transistor T5
VN3) with grid voltage (the voltage signal V of first node N1N1) variation and change, according to I=(1/2) μnCox(W5/L5)
(VN3-VN1-Vth)2It is found that W5/L5For the breadth length ratio of the 5th transistor T5, the voltage signal V of third node N3N3With first segment
The voltage signal V of point N1N1Raising and increase, so as to know first node N1's according to the voltage signal of third node N3
Voltage signal.
Based on the specific structure of feedback submodule 9, in the phase III, the 4th transistor T4 can be considered constant-current source, and the 4th is brilliant
Body pipe T4 provides a stable constant current I, also, the effect of the voltage signal in first node N1 to the 5th transistor T5
Under, the 5th transistor T5 can be considered source follower, and source voltage (voltage signal of third node N3) is with grid voltage (
The voltage signal of one node N1) raising and increase, so as to accurate according to the size of the voltage signal of third node N3
Feed back the size of the voltage signal of first node N1 out.
Optionally, referring again to Fig. 3, output sub-module 10 includes the 6th transistor T6, the grid of the 6th transistor T6
It is electrically connected with second control signal end Vck2, the first pole of the 6th transistor T6 is electrically connected with third node N3, the 6th transistor
The second pole of T6 is electrically connected with output signal line OL.
In conjunction with Fig. 6, in phase III t3, the second control signal that second control signal end Vck2 is provided is low level, the
Six transistor T6 are connected under the action of low level, and the voltage signal of third node N3 is transmitted via the 6th transistor T6 of conducting
To output signal line OL, and then it is transmitted to compensating unit 11.
In addition, detection module 6 further includes first capacitor C1 and the second capacitor C2 referring again to Fig. 3；Wherein, the first electricity
The first pole held is electrically connected with the first fixed signal end VDD, and the second pole of first capacitor is electrically connected with first node N1, for steady
Determine the current potential of first node N1；First pole of the second capacitor is electrically connected with the first fixed signal end VDD, the second pole of the second capacitor
It is electrically connected with second node N2, for stablizing the current potential of second node N2.Also, when the photo-signal that photosensitive element 8 is converted
When being transmitted to first node N1, first capacitor can also stablize the rate of climb of first node N1 current potential, avoid by first node N1
Current potential steeply rise caused jitter.
Optionally, to guarantee that photosensitive element 8 has good photobehavior, photosensitive element 8 includes Silicon-based PIN devices, indium
Gallium zinc oxide film transistor, low-temperature polysilicon film transistor or amorphous silicon device.
Optionally, referring again to Fig. 1, viewing area 1 is additionally provided with data line Data, data line Data and the first light-emitting component
3 electrical connections；Output signal line OL and data line Data same layer are arranged, in manufacture craft, output signal line OL and data line
Data simplifies production stream using a patterning processes formation, output signal line OL without additional patterning processes
Journey, and reduce the production cost.
Optionally, as shown in fig. 7, Fig. 7 is the structural schematic diagram of compensating unit provided by the embodiment of the present invention, compensation is single
Member 11 includes that attenuation degree obtains module 17, regulation parameter acquisition module 18 and D/A converter module 19.Wherein, attenuation degree obtains
Modulus block 17 is electrically connected with output sub-module 10, and the voltage signal for being exported according to output sub-module 10 obtains intrinsic brilliance and declines
Subtract percentage；Regulation parameter acquisition module 18 obtains module 17 with attenuation degree and is electrically connected, for the brightness decay according to storage
Percentage-regulation parameter mapping relations obtains the corresponding compensation of intrinsic brilliance attenuation percentage and regulates and controls parameter；D/A converter module
19 are electrically connected with regulation parameter acquisition module 18, driving chip and the first light-emitting component 3 respectively, for according to compensation regulation ginseng
Number, the digital data signal that driving chip is provided is converted to compensation analog data signal, and is transmitted to the first light-emitting component 3,
The light emission luminance of first light-emitting component 3 is compensated.
It should be noted that the corresponding digital number of 0~255 grayscale that D/A converter module 19 is used to provide driving chip
It is believed that number being converted to the corresponding analog data signal of 0~255 grayscale, and by the analog and digital signal of conversion via data line Data
It is transmitted in corresponding first light-emitting component 3.Wherein, the conversion proportion between digital data signal and analog data signal is by adjusting
It controls parameter to determine, that is to say, that the corresponding digital data signal of 0~255 grayscale is under the action of different regulation parameters, conversion
Analog data signal it is different, illustratively, for same digital data signal, under the regulation of the first regulation parameter, digital-to-analogue
Voltage range corresponding with 0~255 grayscale is V1~V2 in the analog data signal that conversion module 19 is converted, and adjusts second
Under the regulation for controlling parameter, voltage range corresponding with 0~255 grayscale in the analog data signal that D/A converter module 19 is converted
For V3~V4, V1 ≠ V3, V2 ≠ V4.Regulate and control parameter concretely reference potential parameter.
Specifically, after attenuation degree obtains the voltage signal that module 17 obtains third node N3, according to third node N3's
The size of voltage signal, can know the practical light emission luminance of the second light-emitting component 5 (the first light-emitting component 3), and then know
The intrinsic brilliance attenuation percentage of one light-emitting component 3.Regulate and control parameter acquisition module 18 and then according to intrinsic brilliance attenuation percentage,
It is searched, is known and intrinsic brilliance decaying hundred in pre-stored brightness decay percentage-regulation parameter mapping relations
Divide than corresponding regulation parameter, that is, compensation regulation parameter.Further, D/A converter module 19 is based on compensation regulation parameter,
The digital data signal that driving chip is provided is converted to compensation analog data signal, guarantees that the first light-emitting component 3 is compensated
Practical light emission luminance is equal to target light emission luminance, improves display effect.
Illustratively, when the first light-emitting component 3 shows 255 grayscale, it is corresponding that 255 grayscale are provided to the first light-emitting component 3
Analog data voltage V5 after, theoretically, the target light emission luminance value that the first light-emitting component 3 need to be shown is L1, but by old
The influence of change factor, the intrinsic brilliance value L2 that the first light-emitting component 3 is shown under the action of analog data voltage V5 are less than L1.This
When, according toIntrinsic brilliance attenuation percentage is calculated, and obtains compensation regulation parameter.In the regulation of compensation regulation parameter
Under, the corresponding analog data voltage of 255 grayscale is converted to V6, V6 < V5 by D/A converter module 19, therefore, theoretically, the
Light emission luminance value L3 of one light-emitting component 3 at analog data voltage V6 is greater than L1, but is influenced by aging action, first
The intrinsic brilliance value L4 that light-emitting component 3 is shown under the action of analog data voltage V5 is less than L3, therefore the L1 that levels off to passes through
This kind of compensation way can guarantee that the compensated practical real brightness value of the first light-emitting component 3 levels off to target brightness value.
The embodiment of the invention also provides a kind of luminance compensation method of display panel, which is applied to upper
It states in display panel, in conjunction with FIG. 1 to FIG. 3, as shown in figure 8, Fig. 8 is the stream of luminance compensation method provided by the embodiment of the present invention
Cheng Tu, the luminance compensation method include:
Step S1: the second light-emitting component 5 of control shines, and makes the luminance phase of its luminance with the first light-emitting component 3
Together.
It enables the luminance of the second light-emitting component 5 identical as the first light-emitting component 3, can guarantee the second light-emitting component 5
Degree of aging is consistent with the degree of aging of the first light-emitting component 3, and then guarantees the brightness decay degree and the of the second light-emitting component 5
The brightness decay degree of one light-emitting component 3 is consistent.
Step S2: the initialization submodule 7 of first stage, light sensation detection unit 4 provide the first reference to first node N1
Signal provides high level signal to second node N2.
At this stage, the first reference signal write-in first that initialization submodule 7 provides the first reference signal end Vref1
Second node N2 is written in node N1, the high level signal that high level signal is provided, and realizes to first node N1 and second node
The current potential of N2 initializes.
Step S3: second stage, photosensitive element 8 senses the optical signal of second light-emitting component 5, and will be converted by optical signal
Photo-signal is transmitted to first node N1.
At this stage, photosensitive element 8 senses the optical signal of the second light-emitting component 5, and the optical signal sensed is converted to
Photo-signal, the photo-signal flow to first node N1, increase the current potential of first node N1.Wherein, photo-signal
Size it is related with the light emission luminance of the second light-emitting component 5, the light emission luminance of the second light-emitting component 5 is higher, and photo-signal is got over
Greatly, the elevated-levels of first node N1 current potential are also bigger.
Step S4: the phase III feeds back submodule 9 for the voltage signal of first node N1 and feeds back to third node N3, defeated
The voltage signal of third node N3 is transmitted to output signal line OL by submodule 10 out.
At this stage, by feeding back submodule 9, the voltage signal of third node N3 is controlled with the voltage of first node N1
The raising of signal and increase, and then the voltage signal of first node N1 out is fed back according to the size of the voltage signal of third node N3
Size.
Step S5: fourth stage, compensating unit 11 obtain thermal compensation signal according to the voltage signal that output sub-module 10 exports,
It is compensated according to light emission luminance of the thermal compensation signal to the first light-emitting component 3.
At this stage, compensating unit 11 knows the second light-emitting component 5 according to the size of the voltage signal of third node N3
Light emission luminance, and then know the brightness decay degree of the second light-emitting component 5 and the first light-emitting component 3, and then decline further according to brightness
Subtract degree and obtain thermal compensation signal, the first light-emitting component 3 is compensated, the practical light emission luminance of the first light-emitting component 3 is equal to
Target light emission luminance.
Using luminance compensation method provided by the embodiment of the present invention, by enable the luminance of the second light-emitting component 5 with
First light-emitting component 3 is identical, can guarantee the degree of aging of the second light-emitting component 5 and the degree of aging one of the first light-emitting component 3
Cause, and then detected by the light emission luminance to the second light-emitting component 5, can accurate feedback go out the bright of the first light-emitting component 3
Spend attenuation degree.Also, the size of the voltage signal of first node N1 can accurate feedback go out the luminance of the second light-emitting component 5
The height of degree, and the size of the voltage signal of first node N1 can be gone out by the voltage signal accurate feedback of third node N3
Come, therefore, after compensating unit 11 knows the voltage signal of third node N3, it will be able to be accurately judged to the second light-emitting component 5
The brightness decay degree of (the first light-emitting component 3), and then the first light-emitting component 3 is accurately compensated, improve because first shines
Brightness decay caused by 3 aging of element makes its displaying target brightness value, improves the display performance of display panel.
Optionally, in conjunction with Fig. 3, initialization submodule 7 includes: the first transistor T1, the grid of the first transistor T1 and
One control signal end Vck1 electrical connection, the first pole of the first transistor T1 are electrically connected with the first reference signal end Vref1, and first is brilliant
The second pole of body pipe T1 is electrically connected with first node N1；Second transistor T2, the grid of second transistor T2 and the first control are believed
Number end Vck1 electrical connection, the first pole of second transistor T2 is electrically connected with high level signal end VGH, and the second of second transistor T2
Pole is electrically connected with second node N2.Feedback submodule 9 includes: third transistor T3, the grid of third transistor T3 and the second control
Signal end Vck2 electrical connection processed, the first pole of third transistor T3 are electrically connected with the second reference signal end Vref2, third transistor
The second pole of T3 is electrically connected with second node N2；Grid and the second node N2 of 4th transistor T4, the 4th transistor T4 are electrically connected
It connects, the first pole of the 4th transistor T4 is electrically connected with the first fixed signal end VDD, the second pole of the 4th transistor T4 and third section
Point N3 electrical connection；The grid of 5th transistor T5, the 5th transistor T5 are electrically connected with first node N1, and the of the 5th transistor T5
One pole is electrically connected with third node N3, and the second pole of the 5th transistor T5 is electrically connected with the second fixed signal end VEE.Export submodule
Block 10 includes: the 6th transistor T6, and the grid of the 6th transistor T6 is electrically connected with second control signal end Vck2, the 6th transistor
The first pole of T6 is electrically connected with third node N3, and the second pole of the 6th transistor T6 is electrically connected with output signal line OL.
In conjunction with Fig. 6, step S2 is specific can include: t1 in the first stage, under the action of first control signal, and first crystal
Pipe T1 and second transistor T2 conducting, the first reference signal are transmitted to first node N1 via the first transistor T1 of conducting, high
Level signal is transmitted to second node N2 via the second transistor T2 of conducting.
Step S3 is specific can include: in second stage t2, photosensitive element 8 senses the optical signal of the second light-emitting component 5, and will
First node N1 is transmitted to by the photo-signal that optical signal is converted.
Step S4 is specific can include: in phase III t3, under the action of second control signal, third transistor T3 is led
Logical, the second reference signal is transmitted to second node N2 via the third transistor T3 of conducting, and the 4th transistor T4 is in the second reference
Saturation region is under the action of signal, the drain saturation current I of the 4th transistor T4 is transmitted to the 5th transistor T5, wherein I=
(1/2)μnCox(W4/L4)(Vref2-VDD-Vth)2, μnFor electron mobility, CoxFor unit area gate oxide capacitance, W4/L4For
The breadth length ratio of 4th transistor T4, Vref2For the second reference signal, VDDFor the first fixed signal, VthFor threshold voltage；In photoelectricity
Under the action of flowing signal, the voltage signal of first node N1 is gradually risen, according to I=(1/2) μnCox(W5/L5)(VN3-VN1-Vth)2,
W5/L5For the breadth length ratio of the 5th transistor T5, the voltage signal V of third node N3 is utilizedN3Feed back the voltage letter of first node N1
Number VN1.Under the action of second control signal, the 6th transistor T6 conducting, the voltage signal V of third node N3N3Via conducting
The 6th transistor T6 be transmitted to output signal line OL.
It can be considered that constant-current source, the 4th transistor T4 are provided to the 5th transistor T5 in phase III t3, the 4th transistor T4
One stable constant current I, also, under the action of the voltage signal of first node N1, the 5th transistor T5 can be considered source
Follower, source voltage (voltage signal of third node N3) is with the liter of grid voltage (voltage signal of first node N1)
It is high and increases, believe so as to accurately feed back the voltage of first node N1 out according to the size of the voltage signal of third node N3
Number size.
Optionally, in conjunction with Fig. 7, compensating unit 11 include: attenuation degree obtain module 17, attenuation degree obtain module 17 with
Output sub-module 10 is electrically connected；Regulate and control parameter acquisition module 18, regulation parameter acquisition module 18 and attenuation degree obtain module 17
And electrical connection；D/A converter module 19, D/A converter module 19 respectively with regulation parameter acquisition module 18, driving chip and first
Light-emitting component 3 is electrically connected.As shown in figure 9, Fig. 9 is another process of luminance compensation method provided by the embodiment of the present invention
Figure, step S5 are specific can include:
Step S51: attenuation degree obtains module 17 and obtains intrinsic brilliance according to the voltage signal that output sub-module 10 exports
Attenuation percentage.
Specifically, after attenuation degree obtains the voltage signal that module 17 obtains third node N3, according to third node N3's
The size of voltage signal, can know the practical light emission luminance of the second light-emitting component 5 and the first light-emitting component 3, and then know
The intrinsic brilliance attenuation percentage of one light-emitting component 3.
Step S52: regulation parameter acquisition module 18 according to brightness decay percentage-regulation parameter mapping relations of storage,
It obtains the corresponding compensation of intrinsic brilliance attenuation percentage and regulates and controls parameter.
Specifically, regulating and controlling parameter acquisition module 18 and then according to intrinsic brilliance attenuation percentage, in pre-stored brightness
It is searched in attenuation percentage-regulation parameter mapping relations, knows regulation ginseng corresponding with the intrinsic brilliance attenuation percentage
Number, the regulation parameter are compensation regulation parameter.
Step S53: D/A converter module 19 regulates and controls parameter according to compensation, and the digital data signal that driving chip is provided turns
It is changed to compensation analog data signal, and is transmitted to the first light-emitting component 3, the light emission luminance of the first light-emitting component 3 is compensated.
Specifically, D/A converter module 19, which is based on the compensation, regulates and controls parameter, the digital data signal that driving chip is provided
Compensation analog data signal is converted to, guarantees that the compensated practical light emission luminance of the first light-emitting component 3 is equal to target light emission luminance,
Improve display effect.
Optionally, step S51 is specific can include: according to the voltage-brightness value mapping relations of storage, obtains output sub-module
The corresponding intrinsic brilliance value L1 of voltage signal of 10 outputs；According to | L2-L1 |/L2 calculates intrinsic brilliance attenuation percentage,
In, L2 is the corresponding normal brightness value of the second light-emitting component 5.
Specifically, attenuation degree, which obtains in module 17, is previously stored with voltage-brightness value mapping relations, which can
The mapping relations for thinking the voltage signal of third node N3 and the brightness value of the second light-emitting component 5, are also possible to first node N1
Voltage signal and the mapping relations of brightness value of the second light-emitting component 5 obtain the by being searched in the mapping relations
The intrinsic brilliance value of two light emitting 5 (the first light-emitting component 3), so it is right according to the second light-emitting component 5 (the first light-emitting component 3)
The normal brightness value answered calculates the intrinsic brilliance attenuation percentage of the second light-emitting component 5 (the first light-emitting component 3).
The embodiment of the invention also provides a kind of display devices, and as shown in Figure 10, Figure 10 is provided by the embodiment of the present invention
Display device structural schematic diagram, which includes above-mentioned display panel 100.Wherein, the specific knot of display panel 100
Structure is described in detail in the above-described embodiments, and details are not described herein again.Certainly, display device shown in Fig. 10 is only
Schematically illustrate, which can be any such as mobile phone, tablet computer, laptop, electric paper book or television set
Electronic equipment having a display function.
The display device as provided by the embodiment of the present invention includes above-mentioned display panel 100, it is filled using the display
It sets, can accurately detect the light emission luminance of the first light-emitting component 3, know the brightness decay degree of the first light-emitting component 3, and then right
First light-emitting component 3 is accurately compensated, and brightness decay caused by improving because of light-emitting component aging makes its displaying target brightness
Value, improves the display performance of display device.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (18)
1. a kind of display panel characterized by comprising
Viewing area and non-display area around the viewing area are equipped with the first light-emitting component in the viewing area；
At least one light sensation detection unit, the light sensation detection unit include the second light-emitting component and detection module；Wherein, described
Second light-emitting component is located at the non-display area, the luminance phase of second light-emitting component and first light-emitting component
Together；
The detection module includes initialization submodule, photosensitive element, feedback submodule and output sub-module；
The initialization submodule respectively with first control signal end, the first reference signal end, high level signal end, first node
It is electrically connected with second node, for providing the first reference signal to the first node, Xiang Suoshu second node provides high level
Signal；
The photosensitive element is electrically connected with the first fixed signal end and the first node respectively, is shone for sensing described second
The optical signal of element, and the photo-signal converted by the optical signal is transmitted to the first node；
The feedback submodule respectively with second control signal end, the second reference signal end, first fixed signal end, second
Fixed signal end, the first node, the second node and the electrical connection of third node, for by the voltage of the first node
Signal feeds back to the third node；
The output sub-module is electrically connected with the second control signal end, the third node and output signal line respectively, is used
In the voltage signal of the third node is transmitted to the output signal line；
Compensating unit, the compensating unit are electrically connected with the output sub-module and first light-emitting component respectively, are used for root
Thermal compensation signal is obtained according to the voltage signal of output sub-module output, according to the thermal compensation signal to first light-emitting component
Light emission luminance compensate.
2. display panel according to claim 1, which is characterized in that the viewing area includes n sub-viewing areas, described
Display panel includes the n light sensation detection units, and n is the positive integer greater than 1；
Described first in second light-emitting component and a sub-viewing areas in one light sensation detection unit
The luminance of light-emitting component is identical.
3. display panel according to claim 1, which is characterized in that each light sensation detection unit includes multiple color
Second light-emitting component, described of second light-emitting component and same color in a light sensation detection unit
The luminance of one light-emitting component is identical.
4. display panel according to claim 1, which is characterized in that second light-emitting component includes cathode layer, shines
Layer and transparent anode layer.
5. display panel according to claim 4, which is characterized in that
The photosensitive element is located at second light-emitting component backwards to the side of display panel light-emitting surface.
6. display panel according to claim 1, which is characterized in that the display panel further include:
Light shield layer, the light shield layer are located at the side of light-emitting surface of second light-emitting component towards display panel.
7. display panel according to claim 1, which is characterized in that the initialization submodule includes:
The first transistor, the grid of the first transistor are electrically connected with the first control signal end, the first transistor
The first pole be electrically connected with first reference signal end, the second pole and the first node of the first transistor are electrically connected
It connects；
Second transistor, the grid of the second transistor are electrically connected with the first control signal end, the second transistor
The first pole be electrically connected with the high level signal end, the second pole of the second transistor is electrically connected with the second node.
8. display panel according to claim 1, which is characterized in that the feedback submodule includes:
Third transistor, the grid of the third transistor are electrically connected with the second control signal end, the third transistor
The first pole be electrically connected with second reference signal end, the second pole and the second node of the third transistor are electrically connected
It connects；
The grid of 4th transistor, the 4th transistor is electrically connected with the second node, and the first of the 4th transistor
Pole is electrically connected with first fixed signal end, and the second pole of the 4th transistor is electrically connected with the third node；
The grid of 5th transistor, the 5th transistor is electrically connected with the first node, and the first of the 5th transistor
Pole is electrically connected with the third node, and the second pole of the 5th transistor is electrically connected with second fixed signal end.
9. display panel according to claim 1, which is characterized in that the output sub-module includes:
The grid of 6th transistor, the 6th transistor is electrically connected with the second control signal end, the 6th transistor
The first pole be electrically connected with the third node, the second pole of the 6th transistor is electrically connected with the output signal line.
10. display panel according to claim 1, which is characterized in that the detection module further include:
First pole of first capacitor, the first capacitor is electrically connected with first fixed signal end, and the of the first capacitor
Two poles are electrically connected with the first node；
First pole of the second capacitor, second capacitor is electrically connected with first fixed signal end, and the of second capacitor
Two poles are electrically connected with the second node.
11. display panel according to claim 1, which is characterized in that
The photosensitive element include Silicon-based PIN devices, indium gallium zinc oxide thin film transistor (TFT), low-temperature polysilicon film transistor or
Amorphous silicon device.
12. display panel according to claim 1, which is characterized in that
The viewing area is additionally provided with data line, and the data line is electrically connected with first light-emitting component；
The output signal line and the data line same layer are arranged.
13. display panel according to claim 1, which is characterized in that the compensating unit includes:
Attenuation degree obtains module, and the attenuation degree obtains module and is electrically connected with the output sub-module, for according to
The voltage signal of output sub-module output obtains intrinsic brilliance attenuation percentage；
Regulate and control parameter acquisition module, the regulation parameter acquisition module obtains module with the attenuation degree and is electrically connected, and is used for root
According to brightness decay percentage-regulation parameter mapping relations of storage, the corresponding compensation of the intrinsic brilliance attenuation percentage is obtained
Regulate and control parameter；
D/A converter module, the D/A converter module respectively with the regulation parameter acquisition module, driving chip and described
The electrical connection of one light-emitting component, for regulating and controlling parameter according to the compensation, the digital data signal that the driving chip is provided turns
Be changed to compensation analog data signal, and be transmitted to first light-emitting component, to the light emission luminance of first light-emitting component into
Row compensation.
14. a kind of luminance compensation method of display panel, which is characterized in that it is applied to display panel as described in claim 1,
Include:
It controls second light-emitting component to shine, keeps its luminance identical as the luminance of first light-emitting component；
The initialization submodule of first stage, the light sensation detection unit provide first reference to the first node
Signal, Xiang Suoshu second node provide the high level signal；
Second stage, the optical signal of the second light-emitting component described in the photosensitive elements sense, and will be converted by the optical signal
Photo-signal is transmitted to the first node；
Phase III, the voltage signal of the first node is fed back to the third node by the feedback submodule, described defeated
The voltage signal of the third node is transmitted to the output signal line by submodule out；
Fourth stage, the compensating unit obtains thermal compensation signal according to the voltage signal that the output sub-module exports, according to institute
Thermal compensation signal is stated to compensate the light emission luminance of first light-emitting component.
15. luminance compensation method according to claim 14, which is characterized in that
The initialization submodule includes:
The first transistor, the grid of the first transistor are electrically connected with the first control signal end, the first transistor
The first pole be electrically connected with first reference signal end, the second pole and the first node of the first transistor are electrically connected
It connects；Second transistor, the grid of the second transistor are electrically connected with the first control signal end, the second transistor
First pole is electrically connected with the high level signal end, and the second pole of the second transistor is electrically connected with the second node；
The feedback submodule includes:
Third transistor, the grid of the third transistor are electrically connected with the second control signal end, the third transistor
The first pole be electrically connected with second reference signal end, the second pole and the second node of the third transistor are electrically connected
It connects；The grid of 4th transistor, the 4th transistor is electrically connected with the second node, the first pole of the 4th transistor
It is electrically connected with first fixed signal end, the second pole of the 4th transistor is electrically connected with the third node；5th is brilliant
The grid of body pipe, the 5th transistor is electrically connected with the first node, the first pole of the 5th transistor and described the
The electrical connection of three nodes, the second pole of the 5th transistor is electrically connected with second fixed signal end；
The output sub-module includes:
The grid of 6th transistor, the 6th transistor is electrically connected with the second control signal end, the 6th transistor
The first pole be electrically connected with the third node, the second pole of the 6th transistor is electrically connected with the output signal line；
The initialization submodule of the first stage, the light sensation detection unit provide described first to the first node
Reference signal, Xiang Suoshu second node provide the high level signal；Second stage, the second hair described in the photosensitive elements sense
The optical signal of optical element, and the photo-signal converted by the optical signal is transmitted to the first node；Phase III, institute
It states feedback submodule and the voltage signal of the first node is fed back into the third node, the output sub-module is by described the
The voltage signal of three nodes is transmitted to the output signal line
First stage, under the action of first control signal, the first transistor and second transistor conducting, described the
One reference signal is transmitted to the first node via the first transistor of conducting, and the high level signal is via conducting
The second transistor is transmitted to the second node；
Second stage, the optical signal of the second light-emitting component described in the photosensitive elements sense, and will be converted by the optical signal
Photo-signal is transmitted to the first node；
Phase III, under the action of second control signal, the third transistor conducting, the second reference signal is via conducting
The third transistor is transmitted to the second node, and the 4th transistor is in second reference signal and fixed current potential letter
Saturation region is under the action of number, the drain saturation current I of the 4th transistor is transmitted to the 5th transistor, wherein I=
(1/2)μnCox(W4/L4)(Vref2-VDD-Vth)2, μnFor electron mobility, CoxFor unit area gate oxide capacitance, W4/L4For
The breadth length ratio of 4th transistor, Vref2For second reference signal, VDDFor the first fixed signal, VthFor threshold voltage；
Under the action of the photo-signal, the voltage signal of the first node is gradually risen, according to I=(1/2) μnCox(W5/
L5)(VN3-VN1-Vth)2, W5/L5For the breadth length ratio of the 5th transistor, the voltage signal V of the third node is utilizedN3Feedback
The voltage signal V of the first nodeN1；Under the action of the second control signal, the 6th transistor turns, described
The voltage signal V of three nodesN3The output signal line is transmitted to via the 6th transistor of conducting.
16. luminance compensation method according to claim 14, which is characterized in that
The compensating unit includes:
Attenuation degree obtains module, and the attenuation degree obtains module and is electrically connected with the output sub-module；
Regulate and control parameter acquisition module, the regulation parameter acquisition module obtains module with the attenuation degree and is electrically connected；
D/A converter module, the D/A converter module respectively with the regulation parameter acquisition module, driving chip and described
The electrical connection of one light-emitting component；
The compensating unit obtains thermal compensation signal according to the voltage signal that the output sub-module exports, according to the thermal compensation signal
The light emission luminance of first light-emitting component is compensated and includes:
The attenuation degree obtains module and obtains intrinsic brilliance decaying percentage according to the voltage signal that the output sub-module exports
Than；
The regulation parameter acquisition module obtains the reality according to brightness decay percentage-regulation parameter mapping relations of storage
Brightness decay percentage corresponding compensation in border regulates and controls parameter；
The D/A converter module regulates and controls parameter according to the compensation, and the digital data signal that the driving chip is provided is converted
To compensate analog data signal, and it is transmitted to first light-emitting component, the light emission luminance of first light-emitting component is carried out
Compensation.
17. luminance compensation method according to claim 16, which is characterized in that described to be exported according to the output sub-module
Voltage signal obtain intrinsic brilliance attenuation percentage include:
According to the voltage-brightness value mapping relations of storage, the corresponding reality of voltage signal of the output sub-module output is obtained
Brightness value L 1；
According to | L2-L1 |/L2 calculates intrinsic brilliance attenuation percentage, wherein L2 is the corresponding standard of second light-emitting component
Brightness value.
18. a kind of display device, which is characterized in that including the described in any item display panels of such as claim 1~13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654346.6A CN110364114B (en) | 2019-07-19 | 2019-07-19 | Display panel, brightness compensation method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654346.6A CN110364114B (en) | 2019-07-19 | 2019-07-19 | Display panel, brightness compensation method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110364114A true CN110364114A (en) | 2019-10-22 |
| CN110364114B CN110364114B (en) | 2021-03-30 |
Family
ID=68221119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910654346.6A Active CN110364114B (en) | 2019-07-19 | 2019-07-19 | Display panel, brightness compensation method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110364114B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024223A (en) * | 2019-12-16 | 2020-04-17 | 广州视源电子科技股份有限公司 | Display device, light attenuation compensation method and compensation device thereof and display system |
| CN111402793A (en) * | 2019-11-21 | 2020-07-10 | 友达光电股份有限公司 | Light emitting module and compensation method thereof |
| CN111899688A (en) * | 2020-09-22 | 2020-11-06 | 上海天马有机发光显示技术有限公司 | Display panel, brightness compensation method thereof and display device |
| CN112216209A (en) * | 2020-10-14 | 2021-01-12 | 厦门天马微电子有限公司 | Display panel and electronic equipment |
| CN112331141A (en) * | 2020-11-03 | 2021-02-05 | Tcl华星光电技术有限公司 | OLED display panel and display device |
| CN112908254A (en) * | 2021-01-28 | 2021-06-04 | 上海天马有机发光显示技术有限公司 | Display panel, brightness compensation method of display panel and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011070018A (en) * | 2009-09-25 | 2011-04-07 | Sony Corp | Display device |
| CN102024420A (en) * | 2009-09-18 | 2011-04-20 | 索尼公司 | Display device |
| CN102024419A (en) * | 2009-09-18 | 2011-04-20 | 索尼公司 | Display unit and brightness correction method of the same |
| CN102214435A (en) * | 2010-04-09 | 2011-10-12 | 索尼公司 | Image display apparatus and image displaying method |
| CN106504707A (en) * | 2016-10-14 | 2017-03-15 | 深圳市华星光电技术有限公司 | OLED pixel mixed compensation circuit and mixed compensation method |
| CN107863056A (en) * | 2016-09-21 | 2018-03-30 | 三星显示有限公司 | Display device and its manufacture method |
| CN109147663A (en) * | 2018-11-28 | 2019-01-04 | 南京中电熊猫平板显示科技有限公司 | A kind of organic light-emitting display device and its luminance compensation method |
-
2019
- 2019-07-19 CN CN201910654346.6A patent/CN110364114B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024420A (en) * | 2009-09-18 | 2011-04-20 | 索尼公司 | Display device |
| CN102024419A (en) * | 2009-09-18 | 2011-04-20 | 索尼公司 | Display unit and brightness correction method of the same |
| JP2011070018A (en) * | 2009-09-25 | 2011-04-07 | Sony Corp | Display device |
| CN102214435A (en) * | 2010-04-09 | 2011-10-12 | 索尼公司 | Image display apparatus and image displaying method |
| CN107863056A (en) * | 2016-09-21 | 2018-03-30 | 三星显示有限公司 | Display device and its manufacture method |
| CN106504707A (en) * | 2016-10-14 | 2017-03-15 | 深圳市华星光电技术有限公司 | OLED pixel mixed compensation circuit and mixed compensation method |
| CN109147663A (en) * | 2018-11-28 | 2019-01-04 | 南京中电熊猫平板显示科技有限公司 | A kind of organic light-emitting display device and its luminance compensation method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402793A (en) * | 2019-11-21 | 2020-07-10 | 友达光电股份有限公司 | Light emitting module and compensation method thereof |
| CN111024223A (en) * | 2019-12-16 | 2020-04-17 | 广州视源电子科技股份有限公司 | Display device, light attenuation compensation method and compensation device thereof and display system |
| CN111899688A (en) * | 2020-09-22 | 2020-11-06 | 上海天马有机发光显示技术有限公司 | Display panel, brightness compensation method thereof and display device |
| CN111899688B (en) * | 2020-09-22 | 2021-08-24 | 上海天马有机发光显示技术有限公司 | Display panel, brightness compensation method thereof and display device |
| CN112216209A (en) * | 2020-10-14 | 2021-01-12 | 厦门天马微电子有限公司 | Display panel and electronic equipment |
| CN112331141A (en) * | 2020-11-03 | 2021-02-05 | Tcl华星光电技术有限公司 | OLED display panel and display device |
| CN112908254A (en) * | 2021-01-28 | 2021-06-04 | 上海天马有机发光显示技术有限公司 | Display panel, brightness compensation method of display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110364114B (en) | 2021-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110364114A (en) | Display panel and its luminance compensation method, display device | |
| CN106991965B (en) | A kind of compensation of ageing system and method for OLED device | |
| CN103730088B (en) | Drive equipment and the method for organic light-emitting display device | |
| CN106935190B (en) | A kind of organic light emitting display panel, organic light-emitting display device, organic light emitting display panel driving method | |
| CN109599060A (en) | Pixel compensation method, pixel compensation system and display device | |
| CN103137067B (en) | Organic LED display device and driving method thereof | |
| US7932880B2 (en) | EL display panel driving method | |
| CN106531067B (en) | A kind of pixel circuit and its display device | |
| TWI582740B (en) | Electro-optical device and electronic apparatus having the same | |
| CN103000129B (en) | Display device and the driving method for display device | |
| CN107799040A (en) | Organic electroluminescence display panel, organic light-emitting display device and method for detecting short circuit | |
| CN105788520B (en) | Organic light emitting display device | |
| CN106157895B (en) | A kind of organic light emitting display panel and its driving method | |
| US10699646B2 (en) | Data driver and organic light-emitting display device using the same | |
| CN106652912A (en) | Organic light emitting pixel driving circuit, driving method and organic light emitting display panel | |
| CN101510390A (en) | Lighting period setting method, display panel driving method, backlight driving method and related device | |
| CN107507574B (en) | OLED display panel and its compensation method and device, display device | |
| CN108399890A (en) | A kind of organic light emitting display panel and its driving method, organic light-emitting display device | |
| CN101996554A (en) | Display device and electronic apparatus | |
| CN209232793U (en) | A kind of display panel and display device | |
| KR20200038385A (en) | Flicker quantification system and method of driving the same | |
| KR102319202B1 (en) | Organic light emitting display device | |
| US10665160B2 (en) | Electrooptical device, electronic apparatus, and driving method of electrooptical device | |
| US10283046B2 (en) | Electro-optical device, driving method for electro-optical device, and electronic apparatus | |
| CN110189703A (en) | A kind of display panel and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |