CN110992882B - Correction method and correction device for pixel circuit and display device - Google Patents
Correction method and correction device for pixel circuit and display device Download PDFInfo
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- 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]
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Abstract
The invention discloses a correction method, a correction device and a display device of a pixel circuit, which aim to solve the problem that an OLED display panel in the prior art cannot be accurately compensated, and the display image quality is affected due to uneven brightness. The correction method of the pixel circuit comprises the following steps: loading a first preset voltage on each sensing compensation line of the pixel circuit, and acquiring first information fed back by each sensing compensation line; loading a second preset voltage on each sensing compensation line, and acquiring second information fed back by each sensing compensation line; and determining the corresponding relation between the feedback information and the correction information of each sensing compensation line according to the first information and the second information.
Description
Technical Field
The present invention relates to the field of semiconductor technologies, and in particular, to a method and an apparatus for correcting a pixel circuit, and a display apparatus.
Background
An Organic Light-Emitting Diode (OLED) is a current-type Light-Emitting device, and when displaying, since the electron mobility (TFT mobility) and the threshold voltage (Vth) of a driving transistor in an OLED pixel circuit are changed, the pixel circuit needs to be compensated in real time.
However, each sensing compensation line (sense line) of the OLED display panel has a certain difference, so that the OLED display panel cannot be accurately compensated, and the OLED display panel still has the problem of uneven brightness and affecting the display image quality.
Disclosure of Invention
The invention provides a correction method, a correction device and a display device of a pixel circuit, which are used for solving the problems that an OLED display panel in the prior art cannot be accurately compensated, and the display image quality is affected due to uneven brightness.
The embodiment of the invention provides a correction method of a pixel circuit, which comprises the following steps:
loading a first preset voltage on each sensing compensation line of the pixel circuit, and acquiring first information fed back by each sensing compensation line;
loading a second preset voltage on each sensing compensation line, and acquiring second information fed back by each sensing compensation line;
and determining the corresponding relation between the feedback information and the correction information of each sensing compensation line according to the first information and the second information.
In a possible implementation, the obtaining first information fed back by each sensing compensation line includes: and acquiring a first digital signal value corresponding to a first feedback voltage fed back by each sensing compensation line.
In a possible implementation, the obtaining second information fed back by each sensing compensation line includes: and acquiring a second digital signal value corresponding to a second feedback voltage fed back by each sensing compensation line.
In a possible implementation manner, the determining a corresponding relationship between the feedback information and the correction information of each sensing compensation line according to the first information and the second information includes:
determining a first relational expression according to the first digital signal value and a first theoretical digital signal value corresponding to the first preset voltage;
determining a second relational expression according to the second digital signal value and a second theoretical digital signal value corresponding to the second preset voltage;
and determining the corresponding relation between the feedback digital signal value and the correction digital signal value of each sensing compensation line according to the first relation and the second relation.
In one possible embodiment, the first relation is determined by the following formula:
a*mi+b＝y1wherein a represents a first parameter, b represents a second parameter, miThe first digital signal value, y, representing the feedback of the ith sensing compensation line1Representing a first theoretical digital signal value.
In one possible embodiment, the second relation is determined by the following formula:
a*ni+b＝y2wherein a represents the first parameter, b represents the second parameter, niThe second digital signal value, y, representing the feedback of the ith sensing compensation line2The secondTheoretical digital signal values.
In one possible embodiment, the correspondence is determined by the following formula:
a*ki+b＝liwherein a represents the first parameter, b represents the second parameter, kiThe feedback digital signal value, l, representing the feedback of the ith sensing compensation lineiThe corrected digital signal value representing the ith said sensing compensation line.
In a possible implementation manner, after determining the corresponding relationship between the feedback information and the correction information of each sensing compensation line, the correction method further includes:
in a compensation stage of the pixel circuit, determining the correction information according to the feedback information fed back by each sensing compensation line and the corresponding relation;
determining a corresponding correction voltage according to the correction information;
and loading the correction voltage to the corresponding data signal line.
An embodiment of the present invention further provides a pixel circuit calibration apparatus, including: a first feedback unit, a second feedback unit, and a determination unit, wherein,
the first feedback unit is configured to load a first preset voltage on each sensing compensation line and acquire first information fed back by each sensing compensation line;
the second feedback unit is configured to load a second preset voltage on each sensing compensation line and acquire second information fed back by each sensing compensation line;
the determination unit is configured to determine a correspondence relationship between feedback information and correction information of each of the sensing compensation lines, based on the first information and the second information.
The embodiment of the invention also provides a display device which comprises the correction device of the pixel circuit.
The embodiment of the invention has the following beneficial effects: the correction method of the pixel circuit provided by the embodiment of the invention comprises the following steps: loading a first preset voltage on each sensing compensation line of the pixel circuit, and acquiring first information fed back by each sensing compensation line; loading a second preset voltage on each sensing compensation line, and acquiring second information fed back by each sensing compensation line; according to the first information and the second information, determining the corresponding relationship between the feedback information and the correction information of each sensing compensation line, namely, for each sensing compensation line, loading a first preset voltage and a second preset voltage, obtaining two actual feedback information which are fed back after being influenced by the factors of the sensing compensation signal line, further obtaining two groups of data of theoretical information and feedback information according to the two actual feedback information and two theoretical information corresponding to the first preset voltage and the second preset voltage, obtaining the corresponding relationship between the theoretical information and the feedback information, further correcting the actual feedback information according to the corresponding relationship when the pixel circuit is actually compensated in the follow-up process, eliminating the influence of the sensing compensation line, eliminating the difference between different sensing compensation lines, and improving the condition that the OLED display panel in the prior art can not be accurately compensated, the brightness unevenness still exists, and the display image quality is affected.
Drawings
Fig. 1 is a flowchart illustrating a method for calibrating a pixel circuit according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a specific method for calibrating a pixel circuit according to an embodiment of the present invention;
fig. 4 is a curve diagram of a corresponding relationship according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
Referring to fig. 1, an embodiment of the present invention provides a method for correcting a pixel circuit, including:
step S101, a first preset voltage is applied to each sensing compensation line of the pixel circuit, and first information fed back by each sensing compensation line is obtained.
As to the pixel circuit of the embodiment of the present invention, it can be specifically shown in fig. 2, that is, the pixel circuit may include: the organic light emitting diode display device comprises a first transistor T1 (namely, a driving transistor), a second transistor T2, a third transistor T3, a first capacitor C1, an organic light emitting diode OLED and the like. A gate electrode of the second transistor T2 is electrically connected to the first gate line G1 (not shown in fig. 2), a source electrode of the second transistor T2 is electrically connected to the Data line Data, and a drain electrode of the second transistor T2 is electrically connected to the gate electrode of the first transistor T1. The source of the first transistor T1 is electrically connected to the high level Vdd, one end of the organic light emitting diode OLED is electrically connected to the drain of the first transistor T1, and the other end is electrically connected to the low level Vss, and the first capacitor C1 is disposed between the gate and the drain of the first transistor T1. A gate electrode of the third transistor T3 is electrically connected to the second gate line G2 (not shown in fig. 2), a source electrode of the third transistor T3 is electrically connected to a drain electrode of the first transistor T1, and a drain electrode of the third transistor T3 is electrically connected to the sensing compensation line SL. The sensing compensation line SL is also electrically connected to the analog-to-digital conversion circuit ADC. In the sensing compensation phase, a fixed potential can be applied to the Data line Data, and a signal at the drain of the first transistor T1 is transmitted to the sensing compensation line SL and converted into a digital signal through the analog-to-digital conversion circuit ADC. In a specific implementation, the pixel circuits corresponding to a column of pixels are all electrically connected to one sensing compensation line SL.
Specifically, regarding step S101, acquiring the first information fed back by each sensing compensation line may include: and acquiring a first digital signal value corresponding to a first feedback voltage fed back by each sensing compensation line. The first digital signal value may be a digital signal read when the first feedback voltage fed back by the sensing compensation line SL is read by the analog-to-digital conversion circuit ADC, that is, the first feedback voltage is fed back when the first preset compensation voltage is loaded on the sensing compensation signal line, and a value read by the analog-to-digital conversion circuit ADC of the first feedback voltage is the first digital signal value.
Step S102, a second preset voltage is applied to each sensing compensation line, and second information fed back by each sensing compensation line is obtained.
Specifically, regarding step S102, acquiring second information fed back by each sensing compensation line includes: and acquiring a second digital signal value corresponding to a second feedback voltage fed back by each sensing compensation line. The second digital signal value may specifically be a digital signal read by the sensing compensation line when the second feedback voltage is read by the analog-to-digital conversion circuit ADC.
Step S103, determining the corresponding relation between the feedback information and the correction information of each sensing compensation line according to the first information and the second information.
The correction method of the pixel circuit provided by the embodiment of the invention comprises the following steps: loading a first preset voltage on each sensing compensation line of the pixel circuit, and acquiring first information fed back by each sensing compensation line; loading a second preset voltage on each sensing compensation line, and acquiring second information fed back by each sensing compensation line; according to the first information and the second information, determining the corresponding relationship between the feedback information and the correction information of each sensing compensation line, namely, for each sensing compensation line, loading a first preset voltage and a second preset voltage, obtaining two actual feedback information which are fed back after being influenced by the factors of the sensing compensation signal line, further obtaining two groups of data of theoretical information and feedback information according to the two actual feedback information and two theoretical information corresponding to the first preset voltage and the second preset voltage, obtaining the corresponding relationship between the theoretical information and the feedback information, further correcting the actual feedback information according to the corresponding relationship when the pixel circuit is actually compensated in the follow-up process, eliminating the influence of the sensing compensation line, eliminating the difference between different sensing compensation lines, and improving the condition that the OLED display panel in the prior art can not be accurately compensated, the brightness unevenness still exists, and the display image quality is affected.
In specific implementation, for step S103, determining a corresponding relationship between the feedback information and the correction information of each sensing compensation line according to the first information and the second information includes:
step S1031, determining a first relational expression according to the first digital signal value and a first theoretical digital signal value corresponding to the first preset voltage. In particular, it can be according to the formula a mi+b＝y1To determine a first relation, wherein a represents a first parameter, b represents a second parameter, miFirst digital signal value, y, representing feedback from the ith sensing compensation line1Representing a first theoretical digital signal value. In practical implementation, since the maximum voltage on the sensing compensation line SL can be charged to 3V, corresponding to 1024 bits of data, i.e., the theoretical digital signal value is 1024, and if it is 2V, the theoretical value used for the sensing compensation line SL is (2/3) × 1024. For example, if a first preset voltage of 1V is applied to the first sensing compensation line SL from the left of the OLED display panel, the actual feedback first digital signal value is 300, and the theoretical digital signal value corresponding to the first preset voltage of 1V is (1/3) × 1024, which is about 341, then the OLED display panel may have a first voltage value of 1V, which is about 341A set (300,341) of data is obtained and substituted into the formula a mi+b＝y1Then, a first relation of a × 300+ b — 341 may be obtained, that is, the first relation is a relation with respect to a and b.
Step S1032 determines a second relational expression according to the second digital signal value and a second theoretical digital signal value corresponding to the second preset voltage. Specifically, the formula can be represented by ai+b＝y2To determine a second relation, wherein a represents a first parameter, b represents a second parameter, niValue of a second digital signal, y, representing feedback from the ith sensing compensation line2The second theoretical digital signal value. Specifically, for example, if the first sensing compensation line SL is loaded with the second preset voltage of 2V, the actual feedback second digital signal value is 650, and the theoretical digital signal value corresponding to the second preset voltage of 2V is (2/3) × 1024, i.e., about 682, another set (650,682) of data can be obtained and substituted into the formula a × ni+b＝y2Then, a second relation of a × 650+ b — 682 can be obtained, i.e., the second relation is also a relation relating to a and b. The values of the first parameter a and the second parameter b can be further obtained by combining the first relational expression obtained in step S1031.
Step S1033, determining a corresponding relation between the feedback digital signal value and the correction digital signal value of each sensing compensation line according to the first relation and the second relation. Specifically, the formula a × k can be usedi+b＝liDetermining a corresponding relation, wherein a represents a first parameter, b represents a second parameter, and kiValue of feedback digital signal l representing feedback of i-th sensing compensation lineiThe corrected digital signal value representing the ith sensing compensation line. That is, from the two relational expressions obtained in step S1031 and step S1032, the values of the parameters a and b can be obtained, and further, the correspondence expression of the feedback digital signal value and the correction digital signal value can be obtained. For example, according to the two relations obtained in steps S1031 and S1032, if a is 0.974 and b is 49 for the first sensing compensation line, the relation between the feedback digital signal value and the correction digital signal value of the first sensing compensation line is 0.974 ki+49＝liThen, in the subsequent compensation stage, according to the feedback digital signal value k actually fed back by the first sensing compensation lineiI.e. the corrected digital signal value l can be calculatedi。
In practical implementation, referring to fig. 3, after step S104, after determining the corresponding relationship between the feedback information and the correction information of each sensing compensation line, the correction method further includes:
step S104, in the compensation stage of the pixel circuit, according to the feedback information fed back by each sensing compensation line and the corresponding relation, determining the correction information.
And step S105, determining corresponding correction voltage according to the correction information.
Step S106, a correction voltage is applied to the corresponding data signal line.
An embodiment of the present invention further provides a pixel circuit calibration apparatus, including: a first feedback unit, a second feedback unit, and a determination unit, wherein,
the first feedback unit is configured to load a first preset voltage on each sensing compensation line and acquire first information fed back by each sensing compensation line;
the second feedback unit is configured to load a second preset voltage on each sensing compensation line and acquire second information fed back by each sensing compensation line;
and a determination unit configured to determine a correspondence relationship of the feedback information and the correction information of each sensing compensation line according to the first information and the second information.
The embodiment of the invention also provides a display device which comprises the correction device of the pixel circuit. The display device may specifically include a display IC that controls the display panel to display, and the correction device of the pixel circuit in the embodiment of the present invention may be specifically integrated in the display IC.
In order to more clearly understand the correction method of the pixel circuit provided by the embodiment of the present invention, the following specific examples are given:
for example, the OLED display panel has 3840 sensing compensation lines SL, and each sensing compensation line SL has a certain difference, so that the sensing compensation lines SL need to be corrected before compensation, so as to ensure the accuracy of data when sensing the compensation lines SL. For example, a fixed voltage is used to charge the sensing compensation line SL, and then data after the sensing compensation line SL is collected, 3840 groups of data can be obtained, and these data have a certain difference, so that these data need to be processed to make all the sensing compensation lines SL reach theoretical values, in order to solve this problem, an IC correction algorithm is proposed, which is as follows:
step one, correcting by using 1V of Spre _ h to obtain 3840 data; i.e., Spre _ h equals 1V, yielding mi＝[m1,m2......m3840]3840 sense values (i.e., first digital signal values), while 1V corresponds to a theoretical value of 341 (i.e., 1/3x 1024);
step two, correcting by using Spre _ h-2V to obtain 3840 data; i.e., Spre _ h is 2V, yielding ni＝[n1,n2.....n3840]3840 sense values (i.e., second digital signal values), while 2V corresponds to a theoretical value of 682 (i.e., 2/3x 1024); fitting the data corresponding to each sensing compensation line SL into 3840 curves, as shown in fig. 4 (fig. 4 is a corresponding relationship curve of one of the sensing compensation lines SL);
step three, according to a calculation formula:
a*mi+b＝341 (1)；
a*ni+b＝682 (2)；
calculating 3840 groups [ a, b ] according to the two formulas;
step four, testing with Spre _ h ═ 1.5V to give 3840 groups ki＝[k1,k2,....,k3840]A feedback signal value; k to be obtainediSubstituting into the formula a x ki+ b, calculating the actual corrected digital signal value l of each sensing compensation line SLi. That is, the difference between the sensing compensation lines SL can be eliminated by performing sense through 1v and 2v to obtain two actual values, then finding a binary primary curve, and then correcting the value returned by the following sense according to the curve.
The embodiment of the invention has the following beneficial effects: the correction method of the pixel circuit provided by the embodiment of the invention comprises the following steps: loading a first preset voltage on each sensing compensation line of the pixel circuit, and acquiring first information fed back by each sensing compensation line; loading a second preset voltage on each sensing compensation line, and acquiring second information fed back by each sensing compensation line; according to the first information and the second information, determining the corresponding relationship between the feedback information and the correction information of each sensing compensation line, namely, for each sensing compensation line, loading a first preset voltage and a second preset voltage, obtaining two actual feedback information which are fed back after being influenced by the factors of the sensing compensation signal line, further obtaining two groups of data of theoretical information and feedback information according to the two actual feedback information and two corresponding theoretical information when the first preset voltage and the second preset voltage are applied, obtaining the corresponding relationship between the theoretical information and the feedback information, further correcting the actual feedback information according to the corresponding relationship when the pixel circuit is subsequently compensated, eliminating the influence of the sensing compensation line, eliminating the difference between different sensing compensation lines, and improving the condition that the OLED display panel in the prior art can not be compensated accurately, the brightness unevenness still exists, and the display image quality is affected.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A method of correcting a pixel circuit, comprising:
loading a first preset voltage on each sensing compensation line of the pixel circuit, and acquiring a first digital signal value corresponding to a first feedback voltage fed back by each sensing compensation line;
loading a second preset voltage on each sensing compensation line, and acquiring a second digital signal value corresponding to a second feedback voltage fed back by each sensing compensation line;
according to the first digital signal value, the secondA first theoretical digital signal value corresponding to a predetermined voltage, and a mi+b=y1Determining a first relational expression;
according to the second digital signal value, a second theoretical digital signal value corresponding to the second preset voltage, and a x ni+b=y2Determining a second relational expression;
according to the first relation, the second relation and a x ki+b=liDetermining the corresponding relation between the feedback digital signal value and the correction digital signal value of each sensing compensation line, wherein a represents a first parameter, b represents a second parameter, and m represents a second parameteriThe first digital signal value, y, representing the feedback of the ith sensing compensation line1Representing a first theoretical digital signal value, niThe second digital signal value, y, representing the feedback of the ith sensing compensation line2Said second theoretical digital signal value, kiThe feedback digital signal value, l, representing the feedback of the ith sensing compensation lineiThe corrected digital signal value representing the ith said sensing compensation line;
the pixel circuit includes: the organic light emitting diode comprises a first transistor, a second transistor, a third transistor, a first capacitor and an organic light emitting diode;
the grid electrode of the second transistor is electrically connected to the first grid line, the source electrode of the second transistor is electrically connected to the data line, and the drain electrode of the second transistor is electrically connected to the grid electrode of the first transistor;
the source electrode of the first transistor is electrically connected to a high level;
one end of the organic light emitting diode is electrically connected to the drain electrode of the first transistor, and the other end of the organic light emitting diode is electrically connected to a low level;
the first capacitor is arranged between the grid electrode and the drain electrode of the first transistor;
the grid electrode of the third transistor is electrically connected to the second grid line, the source electrode of the third transistor is electrically connected to the drain electrode of the first transistor, and the drain electrode of the third transistor is electrically connected to the sensing compensation line.
2. The correction method of claim 1, wherein after determining the correspondence of the feedback information and the correction information for each of the sensing compensation lines, the correction method further comprises:
in a compensation stage of the pixel circuit, determining the correction information according to the feedback information fed back by each sensing compensation line and the corresponding relation;
determining a corresponding correction voltage according to the correction information;
and loading the correction voltage to the corresponding data signal line.
3. A correction device for a pixel circuit, comprising: a first feedback unit, a second feedback unit, and a determination unit, wherein,
the first feedback unit is configured to load a first preset voltage on each sensing compensation line of the pixel circuit and acquire a first digital signal value corresponding to a first feedback voltage fed back by each sensing compensation line;
the second feedback unit is configured to load a second preset voltage on each sensing compensation line and acquire a second digital signal value corresponding to a second feedback voltage fed back by each sensing compensation line;
the determining unit is configured to determine a first theoretical digital signal value corresponding to the first preset voltage according to the first digital signal value, and a mi+b=y1Determining a first relation, and according to the second digital signal value, a second theoretical digital signal value corresponding to the second preset voltage, and a x ni+b=y2Determining a second relation, and determining the second relation based on the first relation, the second relation, and a x ki+b=liDetermining the corresponding relation between the feedback digital signal value and the correction digital signal value of each sensing compensation line, wherein a represents a first parameter, b represents a second parameter, and m represents a second parameteriThe first digital signal value, y, representing the feedback of the ith sensing compensation line1Representing a first theoretical digital signal value, niIndicating the ith entry of said sensingThe value of the second digital signal, y, fed back by the compensation line2Said second theoretical digital signal value, kiThe feedback digital signal value, l, representing the feedback of the ith sensing compensation lineiThe corrected digital signal value representing the ith said sensing compensation line;
the pixel circuit includes: the organic light emitting diode comprises a first transistor, a second transistor, a third transistor, a first capacitor and an organic light emitting diode;
the grid electrode of the second transistor is electrically connected to the first grid line, the source electrode of the second transistor is electrically connected to the data line, and the drain electrode of the second transistor is electrically connected to the grid electrode of the first transistor;
the source electrode of the first transistor is electrically connected to a high level;
one end of the organic light emitting diode is electrically connected to the drain electrode of the first transistor, and the other end of the organic light emitting diode is electrically connected to a low level;
the first capacitor is arranged between the grid electrode and the drain electrode of the first transistor;
the grid electrode of the third transistor is electrically connected to the second grid line, the source electrode of the third transistor is electrically connected to the drain electrode of the first transistor, and the drain electrode of the third transistor is electrically connected to the sensing compensation line.
4. A display device characterized by comprising the correction device of the pixel circuit according to claim 3.
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| KR20180058281A (en) * | 2016-11-23 | 2018-06-01 | 엘지디스플레이 주식회사 | Display Device and Driving Method thereof |
| CN107452333A (en) * | 2017-08-29 | 2017-12-08 | 京东方科技集团股份有限公司 | A kind of pixel compensation method, pixel compensation device and display device |
| CN107367639A (en) * | 2017-08-31 | 2017-11-21 | 京东方科技集团股份有限公司 | Capacitance measurement method and device |
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