CN106782311B - A kind of pixel circuit and its driving method, display panel - Google Patents
A kind of pixel circuit and its driving method, display panel Download PDFInfo
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- CN106782311B CN106782311B CN201710123677.8A CN201710123677A CN106782311B CN 106782311 B CN106782311 B CN 106782311B CN 201710123677 A CN201710123677 A CN 201710123677A CN 106782311 B CN106782311 B CN 106782311B
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- 239000013078 crystal Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a kind of pixel circuit and its driving methods, display panel, it is connect including one end with data write unit, the holding unit that the other end is connect with driving unit, the holding unit is for triggering the driving unit according to the data voltage that the data write unit recently enters in data retention mode.To which the present invention solves the problems, such as that pixel circuit has a large amount of power consumptions and expends in the prior art and constantly refreshes addressing and the continuous refresh data of data line in scan line.
Description
Technical field
The present invention relates to field of display technology, a kind of pixel circuit and its driving method, display panel are particularly related to.
Background technique
Currently, 2T1C structure is generally used in traditional OLED pixel circuit, as shown in fig. 1, including it is sequentially connected
Data write unit 101, capacitor C and driving unit 102.Wherein, data write unit 101 can respectively with scan line sum number
It is connected according to line, and data write unit 101 is that a transistor TFT is constituted.And driving unit 102 then includes a transistor
TFT and OLED lamp is constituted, capacitor C simultaneously in data write unit 101 transistor TFT drain, in driving unit 102
Transistor TFT gate connection.
The 2T1C structure is dynamic addressing, even if being also required to every frame all refresh datas when showing tableaux, no
Break as the gate charges of the transistor TFT in driving unit 102, lights the OLED lamp in driving unit 102.Therefore, traditional
OLED pixel circuit have a large amount of power consumptions and expend and constantly refresh addressing in scan line and data line constantly refreshes number
According to.To, traditional OLED pixel circuit can not suitable for outdoors static status display, and do prolonged displaying.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of pixel circuit and its driving method, display panel, by
Holding unit is set between data write unit and driving unit, is being scanned to solve pixel circuit and have a large amount of power consumption consumings
Line constantly refreshes the problem of addressing refresh data continuous with data line.
Based on above-mentioned purpose pixel circuit provided by the invention, the pixel circuit includes data write unit, driving list
Member and holding unit, described holding unit one end are connect with data write unit, and the other end is connect with driving unit, the holding
Unit is single for triggering the driving according to the data voltage that the data write unit recently enters in data retention mode
Member.
In some embodiments of the invention, the holding unit includes memory resistor and second transistor, the memory
Resistance one end is connect with low level voltage, and the other end connect with the data write unit respectively, the grid of the second transistor
Pole connection；Also, the source electrode of the second transistor is connect with high level voltage, the drain electrode of the second transistor and the drive
Moving cell connection.
In some embodiments of the invention, the holding unit further includes the second light emitting diode OLED, and described
Two-transistor is photosensitive double-gated transistor；Wherein, the anode of the grid of the photosensitive double-gated transistor and the memory resistor connects
It connects, the drain electrode of the photosensitive double-gated transistor is connected to driving unit by the second light emitting diode OLED.
In some embodiments of the invention, the holding unit further includes first resistor and second resistance, and described
Two light emitting diode OLED are connected to driving unit by the first resistor, while the first resistor passes through second electricity
Resistance ground connection.
The invention also provides a kind of driving methods of pixel circuit, using the pixel of any one embodiment described above
The driving method of circuit includes:
When showing dynamic menu, data write unit connection, and the data voltage on data line is sent to holding list
Member, holding unit is according to the data voltage trigger drive unit；
When showing tableaux, data write unit is closed, and holding unit is recently entered according to data write unit
Data voltage trigger drive unit.
In some embodiments of the invention, the data voltage that the holding unit is recently entered according to data write unit
Trigger drive unit includes:
Memory resistor is in connected state, and power end makes the second crystalline substance by gate charges of the memory resistor to second transistor
Body pipe is in the open state；
Second transistor sends high level voltage to driving unit.
In some embodiments of the invention, the data voltage that the holding unit is recently entered according to data write unit
Trigger drive unit further include:
Second transistor is photosensitive double-gated transistor, and photosensitive double-gated transistor in the open state makes the second light-emitting diodes
Pipe OLED is lighted, and the high level voltage of photosensitive double-gated transistor is sent to driving after first resistor and second resistance partial pressure
Unit.
The invention also provides a kind of display panel, each sub-pixel unit in the display panel includes described above
The pixel circuit of any one embodiment.
In some embodiments of the invention, each sub-pixel unit includes that multiple data write-ins interconnected are single
Member and holding unit respectively with multiple driving resistor coupled in parallel, and series connection in the driving unit.
From the above it can be seen that a kind of pixel circuit provided by the invention and its driving method, display panel, pass through
One end is connect with data write unit, the holding unit that the other end is connect with driving unit.To which the present invention can be protected in data
Holding unit trigger drive unit is utilized when holding state, that is to say, that no longer needed when showing tableaux to pixel data into
Row ceaselessly refreshes, it is no longer necessary to which scan line ceaselessly addresses, and realizes a kind of pixel circuit of low-power consumption.
Detailed description of the invention
Fig. 1 is existing traditional OLED pixel circuit figure；
Fig. 2 is the schematic diagram of pixel circuit in first embodiment of the invention；
Fig. 3 is the flow diagram of pixel circuit drive method in first embodiment of the invention；
Fig. 4 is the circuit diagram of the data write unit and driving unit that can refer in first embodiment of the invention；
Fig. 5 is the schematic diagram of pixel circuit in second embodiment of the invention；
Fig. 6 is the flow diagram of pixel circuit drive method in second embodiment of the invention；
Fig. 7 is the schematic diagram of pixel circuit in third embodiment of the invention；
Fig. 8 is the schematic diagram of pixel circuit in fourth embodiment of the invention；
Fig. 9 is the structural schematic diagram of each sub-pixel unit in the embodiment of the present invention in display panel；
Figure 10 is the structural schematic diagram for each sub-pixel unit that can refer in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
As shown in fig.2, for the schematic diagram of pixel circuit in first embodiment of the invention, wherein the pixel circuit packet
Include data write unit 201, holding unit 202 and driving unit 203.Described 202 one end of holding unit and data is written
Unit 201 connects, and the other end is connect with driving unit 203.Also, data write unit 201 can simultaneously with data line and sweep
Retouch line connection.
In this embodiment, the driving method of the pixel circuit, as shown in figure 3, detailed process includes:
Step 301, when showing dynamic menu, data write unit 201 is connected to, and the data voltage on data line is sent out
It send to holding unit 202, holding unit 202 is according to the data voltage trigger drive unit 203.
Wherein, when pixel circuit needs to show dynamic menu, then the refreshing of data is carried out, data can be made by scan line
Writing unit 201 is in connected state, that is to say, that scan line is addressed, data write unit 201 is opened, to make data
Writing unit 201 can receive the data voltage on data line.
Step 302, when showing tableaux, data write unit 201 is closed, and holding unit 202 is written according to data
The data voltage trigger drive unit 203 that unit 201 recently enters.
Wherein, when pixel circuit needs to show tableaux, then the holding of data is carried out, data can be made by scan line
Writing unit 201 is in close state, that is to say, that scan line stops addressing, data write unit 201 is closed, to make data
The stopping of writing unit 201 obtains data voltage from data line.Meanwhile holding unit 202 is then write according to data in this case
Enter last received data voltage trigger drive unit 203 before unit 201 is closed.
Therefore, the embodiment described may be implemented pixel circuit do not need update picture be in a kind of data holding shape
State only can maintain always currently to draw when that is, described pixel circuit carries out tableaux display by holding unit 202
Face.It is apparent that scan line stops addressing, data line stops refresh data voltage, data write unit in data retention mode
201 stop working, and the energy consumption of the pixel circuit can be greatly reduced.
As a preferred embodiment as shown in figure 4, data write unit 201 can be set to a switching transistor
TFT, and the grid of switching transistor TFT is connect with scan line, and source electrode is connect with data line, and is drained and be connected to holding list
Member 202.To which scan line realizes open and close switching transistor TFT by the grid of switching transistor TFT.When switch crystalline substance
When body pipe TFT is in connected state, data voltage is transmitted by data line by the source electrode of switching transistor TFT, later
The data voltage is sent to holding unit 202 using the drain electrode of switching transistor TFT.
In addition preferably, driving unit 203 can be set to include the first transistor TFT and the first light emitting diode
OLED, wherein the first transistor TFT gate of driving unit 203 is connect with holding unit 202, the source electrode of the first transistor TFT
Connect positive supply VDD, the first light emitting diode OLED of the drain electrode connection driving unit 203 of the first transistor TFT.Moreover, institute
State the other end connection negative supply VEE of the first light emitting diode OLED of driving unit 203.To which, holding unit 202 is according to obtaining
The data voltage obtained controls connecting or disconnecting for driving circuit 203 by the first transistor TFT gate of driving unit 203.When
Driving unit 203 the first transistor TFT connection when, positive supply VDD by pass sequentially through the first transistor TFT source electrode,
Drain electrode conveys voltage to the first light emitting diode OLED of driving unit 203, and lights the first light emitting diode OLED.
In second embodiment of pixel circuit of the present invention, as shown in fig.5, the holding unit 202 can be with
Including memory resistor and second transistor TFT.Wherein, one end of memory resistor is connect with low level voltage VL, memory resistor
The other end is connect with the grid of data write unit 201, second transistor TFT respectively.Also, the source electrode of second transistor TFT
It is connect with high level voltage VGH, the drain electrode of second transistor TFT is connect with driving unit 203.Further, memory resistor
Cathode connect with low level voltage VL, the anode of memory resistor is separately connected the output end and of data write unit 201
The grid of two-transistor TFT.In addition, the drain electrode of second transistor TFT simultaneously with ground voltage VSS.Specifically, when data are written
Unit 201 is set as a switching transistor TFT, and driving unit 203 includes the first transistor TFT and the first light emitting diode
When OLED, the memory resistor is connect with the grid of the drain electrode of switching transistor TFT, second transistor TFT simultaneously.Also, the
The drain electrode of two-transistor TFT is connect with the first transistor TFT gate of driving unit 203.
In this embodiment, the driving method of the pixel circuit, as shown in fig. 6, specific process may include:
Step 601, when showing dynamic menu, data write unit 201 is connected to, and the data voltage on data line is sent out
It send to the memory resistor of holding unit 202, which makes by the grid of second transistor TFT according to the data voltage
Two-transistor TFT is opened or closed, and then controls driving unit 203.
Preferably, memory resistor is compared the data voltage received with low level voltage VL, described in judgement
Whether data voltage is positive simultaneously with low level voltage VL, and the data voltage is greater than low level voltage VL.According to judgement
If otherwise remembering as a result, then memory resistor by the grid of second transistor TFT is connected to the source electrode and drain electrode of transistor TFT
Recalling resistance disconnects the source electrode and drain electrode of transistor TFT by the grid of second transistor TFT.
Step 602, when showing tableaux, data write unit 201 is closed, and memory resistor is according to data write unit
201 data voltages recently entered make whether low level voltage VL charges to second transistor TFT, and then successively make the second crystal
Pipe TFT, driving unit 203 open or close.
Preferably, when the data voltage that data write unit 201 recently enters is positive simultaneously with low level voltage VL, and
Memory resistor fills low level voltage VL to the grid of second transistor TFT when the data voltage is greater than low level voltage VL
Electricity, and then it is connected to the source electrode and drain electrode of second transistor TFT, and high level voltage VGH is sent to driving unit 203, it touches
Hair driving unit 203 works.
When the data voltage that data write unit 201 recently enters is not to be positive simultaneously with low level voltage VL, and institute
Memory resistor will not be such that low level voltage VL fills to the grid of second transistor TFT when stating data voltage greater than low level voltage VL
Electricity, and then the source electrode and drain electrode of second transistor TFT is disconnected, high level voltage VGH can not be sent to driving unit 203,
Driving unit 203 does not work.
In the third embodiment of pixel circuit of the present invention, as shown in fig.7, the holding unit 202 is in reality
Applying can also include the second light emitting diode OLED on the basis of example two.Wherein, the second crystal in the holding unit 202
Pipe TFT is photosensitive double-gated transistor.Also, the note in the grid of the photosensitive double-gated transistor TFT and the holding unit 202
Recall the anode connection of resistance, the drain electrode of the photosensitive double-gated transistor TFT is connected to drive by second light emitting diode OLED
Moving cell 203.Specifically, when driving unit 203 includes the first transistor TFT and the first light emitting diode OLED, this second
Light emitting diode OLED is connected on the first transistor TFT gate of driving unit 203.
To since second transistor TFT is photosensitive double-gated transistor in the embodiment of the invention, in holding unit
When the second light emitting diode OLED in 202 is lighted, the irradiation of second light emitting diode OLED can maintain photosensitive double grid brilliant
The opening degree of body pipe TFT.Therefore, the power consumption of entire pixel circuit can further be saved.
In the 4th embodiment of pixel circuit of the present invention, as shown in fig.8, the holding unit 202 is in reality
Applying can also include first resistor R1 and second resistance R2 on the basis of example three.Wherein, the second hair in holding unit 202
Optical diode OLED is connected to driving unit 203 by first resistor R1, while first resistor R1 is connect by second resistance R2
Ground VSS.Specifically, when driving unit 203 includes the first transistor TFT and the first light emitting diode OLED, second luminous two
Pole pipe OLED is connected to the grid of the first transistor TFT by first resistor R1.
The second light emitting diode OLED can be made to light it is thus possible to obtain second transistor TFT in the open state
When, the high level voltage that second transistor TFT is received is sent to drive after first resistor R1 and second resistance R2 partial pressure
Moving cell 203.Therefore, which can guarantee that the holding unit of the pixel circuit can be stablized, the control of safety drives
Unit 203 works.
As the embodiment of another aspect of the invention, a kind of display panel is additionally provided, includes more in the display panel
A sub-pixel unit, and each sub-pixel unit may include multiple above-mentioned pixel circuits.Such as: as shown in figure 9, an Asia
Pixel unit may include multiple pixel circuits as described above, and by taking 4bit as an example, a pixel circuit can show bright, dark 2 kinds
State, then sub-pixel unit has 16 grayscale, then the corresponding sub-pix list of three colors in RGB color mode RGB
Member is all to have 16 grayscale, then is 16*16*16=4096 color when three Color constitut full colors.Therefore, the present invention is largely saving
On the basis for saving pixel circuit energy consumption, additionally it is possible to realize multicoloured display mode.
In one preferably embodiment, each sub-pixel unit includes multiple data write units interconnected 201
With holding unit 202 respectively with multiple driving resistor coupled in parallel, and the driving resistance and corresponding data write unit of multiple parallel connections
201 and holding unit 202 be connected in series in driving unit 203.Specifically, as shown in fig.10, when driving unit 203 includes
When the first transistor TFT and the first light emitting diode OLED, each sub-pixel unit includes four data write-ins interconnected
Unit 201 and holding unit 202, and this four data write units 201 and holding unit 202 interconnected respectively with drive
Dynamic resistance R1', R2', R3', R4' is in parallel, while the driving resistance R1', R2', R3', R4' series connection.In addition, driving resistance R1'
It connects with the first light emitting diode OLED, the light emitting diode OLED other end connects negative supply VEE.Drive resistance R4' and first
The drain electrode of transistor TFT connects, and the grid of the first transistor TFT is connect with scan line, and the source electrode connection of the first transistor TFT is just
Power vd D.
In conclusion a kind of pixel circuit provided by the invention and its driving method, display panel, creatively propose
When showing tableaux, without ceaselessly being refreshed to pixel data line, without what is ceaselessly addressed to scan line
OLED pixel circuit and its display panel, and the OLED pixel circuit and its display panel has self-locking function, Ke Yichang
Time keeps tableaux not refresh；To which OLED pixel circuit of the present invention and its driving method, display panel are very
The effect of low-power consumption, low cost is realized in big degree；Meanwhile the present invention shows function in the picture for realizing low-power consumption, low cost
When energy, additionally it is possible to multicoloured picture perfectly be presented；Finally, the entire pixel circuit and its driving method, display surface
Plate is compact, it is easy to accomplish, use.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.
In the case where elaborating detail to describe exemplary embodiment of the present invention, those skilled in the art are come
Say it is readily apparent that can without these specific details or in the case that these details change it is real
Apply the present invention.Therefore, these descriptions should be considered as illustrative rather than restrictive.
Although having been incorporated with specific embodiments of the present invention, invention has been described, according to retouching for front
It states, many replacements of these embodiments, modifications and variations will be apparent for those of ordinary skills.Cause
This, all within the spirits and principles of the present invention, any omission, modification, equivalent replacement, improvement for being made etc. should be included in
Within protection scope of the present invention.
Claims (8)
1. a kind of pixel circuit, which is characterized in that the pixel circuit includes data write unit, driving unit and keeps single
Member, described holding unit one end are connect with data write unit, and the other end is connect with driving unit, and the holding unit is used for
The driving unit is triggered according to the data voltage that the data write unit recently enters when data retention mode；
The holding unit includes memory resistor and second transistor, and described memory resistor one end is connect with low level voltage, separately
One end is connect with the grid of the data write unit, the second transistor respectively；Also, the source electrode of the second transistor
It is connect with high level voltage, the drain electrode of the second transistor is connect with the driving unit.
2. pixel circuit according to claim 1, which is characterized in that the holding unit further includes the second light emitting diode
OLED, and the second transistor is photosensitive double-gated transistor；Wherein, the grid of the photosensitive double-gated transistor and the memory
The drain electrode of the anode connection of resistance, the photosensitive double-gated transistor is connected to driving list by the second light emitting diode OLED
Member.
3. pixel circuit according to claim 2, which is characterized in that the holding unit further includes first resistor and second
Resistance, and the second light emitting diode OLED is connected to driving unit, while the first resistor by the first resistor
It is grounded by the second resistance.
4. a kind of driving method of the pixel circuit as described in any in claim 1-3, which is characterized in that the driving method packet
It includes:
When showing dynamic menu, data write unit connection, and the data voltage on data line is sent to holding unit, it protects
Unit is held according to the data voltage trigger drive unit；
When showing tableaux, data write unit is closed, the data that holding unit is recently entered according to data write unit
Voltage triggered driving unit.
5. driving method according to claim 4, which is characterized in that the holding unit is last according to data write unit
The data voltage trigger drive unit of input includes:
Memory resistor is in connected state, and low level voltage makes the second crystalline substance by gate charges of the memory resistor to second transistor
Body pipe is in the open state；
Second transistor sends high level voltage to driving unit.
6. driving method according to claim 5, which is characterized in that the holding unit is last according to data write unit
The data voltage trigger drive unit of input further include:
Second transistor is photosensitive double-gated transistor, and photosensitive double-gated transistor in the open state makes the second light emitting diode
OLED is lighted, and high level voltage is sent to driving unit after first resistor and second resistance partial pressure.
7. a kind of display panel, which is characterized in that each sub-pixel unit in the display panel includes multiple aforesaid rights
It is required that any pixel circuit in 1-3.
8. display panel according to claim 7, which is characterized in that each sub-pixel unit includes multiple: mutually
The data write unit and holding unit of connection；Each data write unit interconnected and holding unit pass through a crystal
One driving resistance of pipe connection；Wherein, data write unit interconnected connects the grid of the transistor with holding unit, and
A pole in the source-drain electrode of the transistor connects one end of the driving resistance, another pole in the source-drain electrode of the transistor
Connect the other end of the driving resistance；Multiple driving resistance are connected in series in driving unit.
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| CN106991975B (en) | 2017-06-08 | 2019-02-05 | 京东方科技集团股份有限公司 | A kind of pixel circuit and its driving method |
| CN107479278A (en) * | 2017-07-06 | 2017-12-15 | 惠科股份有限公司 | Display panel and display device |
| CN107274823B (en) * | 2017-08-04 | 2020-05-12 | 京东方科技集团股份有限公司 | Pixel circuit, handwriting display panel and handwriting display system |
| CN109697951B (en) * | 2019-03-14 | 2021-04-23 | 惠科股份有限公司 | Drive circuit and display panel |
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