CN109523946A - Pixel circuit, display device, and pixel circuit driving method - Google Patents
Pixel circuit, display device, and pixel circuit driving method Download PDFInfo
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- CN109523946A CN109523946A CN201811586857.0A CN201811586857A CN109523946A CN 109523946 A CN109523946 A CN 109523946A CN 201811586857 A CN201811586857 A CN 201811586857A CN 109523946 A CN109523946 A CN 109523946A
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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]
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Abstract
本公开涉及一种像素电路、一种显示装置及一种像素电路驱动方法。该像素电路包含驱动晶体管、数据晶体管、第一晶体管和第二晶体管。驱动晶体管用以根据数据信号选择性地导通，以输出驱动电流驱动发光元件。数据晶体管用以根据扫描信号选择性地导通，以自数据线输出数据信号至驱动晶体管。第一晶体管用以相应于读取信号选择性地导通，以根据第一检测信号控制驱动晶体管的控制端的电压电平。第二晶体管用以相应于读取信号选择性地导通，以自数据线输出第二检测信号控制驱动晶体管的源极端的电压电平。
The present disclosure relates to a pixel circuit, a display device and a pixel circuit driving method. The pixel circuit includes a driving transistor, a data transistor, a first transistor and a second transistor. The driving transistor is used to selectively turn on according to the data signal to output a driving current to drive the light-emitting element. The data transistor is used to selectively turn on according to the scan signal to output the data signal from the data line to the driving transistor. The first transistor is used to selectively turn on corresponding to the read signal to control the voltage level of the control terminal of the driving transistor according to the first detection signal. The second transistor is used to selectively turn on corresponding to the read signal to output a second detection signal from the data line to control the voltage level of the source terminal of the driving transistor.
Description
Technical field
This disclosure relates to a kind of pixel circuit and display devices, and in particular to a kind of pixel with compensation function
Circuit and display device.
Background technique
In recent years, as environmental consciousness comes back, the demands such as energy saving, service life, color saturation and power quality
It is increasingly becoming the factor that consumer considers purchase, while rapid by light emitting diode (Light-emitting diode, LED)
Development is reduced with cost, and light emitting diode is driven to become the Developing mainstream of following illumination and monitor market.
Since light emitting diode is driven by electric current, the spy of transistor and light emitting diode under user's long-time operation
Property can change over time, thus generate color spot (mura) or brightness disproportionation phenomenon.
Summary of the invention
One aspect of present disclosure is related to a kind of pixel circuit.Pixel circuit include driving transistor, data transistor,
The first transistor and second transistor.Drive transistor to be selectively turned on according to data-signal, with output driving current
Drive light-emitting component.Data transistor to be selectively turned on according to scanning signal, with from data line outputting data signals extremely
Drive transistor.The first transistor with being controlled according to first detection signal to be driven corresponding to being connected with reading signal-selectivity
The voltage level of the control terminal of dynamic transistor.Second transistor to corresponding to being connected with reading signal-selectivity, with from data
The voltage level of the source terminal of line output the second detection signal control driving transistor.
Another aspect of present disclosure is related to another display device.Display device includes display panel and source drive
Device.Display panel includes multiple pixel circuits.Any one of pixel circuit includes driving transistor, data transistor, the first inspection
Slowdown monitoring circuit and the second detection circuit.It drives transistor to be selectively turned on according to data-signal, is driven with output driving current
Dynamic light-emitting component.Data transistor according to scanning signal to selectively turn on, from data line outputting data signals to drive
Dynamic transistor.First detection circuit with being controlled according to first detection signal to be driven corresponding to being connected with reading signal-selectivity
The voltage level of the control terminal of dynamic transistor.Second detection circuit corresponding to reading signal-selectivity to be connected, with number certainly
According to the voltage level of the source terminal of line output the second detection signal control driving transistor.Source electrode driver couples pixel circuit,
To receive the first sensor parameter or the second sensor parameter, and according to the first sensor parameter or the second sensor parameter adjustment data letter
Number.
The another aspect of present disclosure is related to another pixel circuit drive method.By the first detection circuit corresponding to reading
The number of winning the confidence selectively turns on, to control the voltage level of the control terminal of driving transistor according to first detection signal；By driving
Transistor provides the first sensor parameter according to the voltage level of the control terminal of driving transistor；By the second detection circuit corresponding to reading
The number of winning the confidence selectively turns on, according to the voltage level of the source terminal of the second detection signal control driving transistor；By shining
Element provides the second sensor parameter according to the voltage level of the source terminal of driving transistor；By source electrode driver according to the first sensing
Parameter and the second sensor parameter adjust data-signal；And selectively turned on by data transistor according to scanning signal, with defeated
Data-signal is to driving transistor to drive light-emitting component out.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of display device shown by the section Example according to present disclosure.
Fig. 2 is a kind of schematic diagram of pixel circuit shown by the section Example according to present disclosure.
Fig. 3 is the schematic diagram of voltage level signal shown by the section Example according to present disclosure.
Fig. 4 be shown according to the section Example of present disclosure it is each in the pixel circuit of Fig. 2 during the first detection
The status diagram of transistor.
Fig. 5 be shown according to the section Example of present disclosure it is each in the pixel circuit of Fig. 2 during the second detection
The status diagram of transistor.
Fig. 6 is that each crystal in the pixel circuit of Fig. 2 is shown in driving period according to the section Example of present disclosure
The status diagram of pipe.
Fig. 7 is the schematic diagram of another pixel circuit shown by the section Example according to present disclosure.
Fig. 8 is the flow chart that a kind of pixel circuit drive method is shown according to the section Example of present disclosure.
Fig. 9 is the flow chart that a kind of pixel circuit drive method is shown according to the section Example of present disclosure.
Wherein, the reference numerals are as follows:
120: source electrode driver
140: gate drivers
160: pixel circuit
TD1: data transistor
TD2: driving transistor
163: the first detection circuits
164: the second detection circuits
C1: capacitor
T1, T2: transistor
LED: light-emitting component
Dn: data line
S1: scanning signal
RD: signal is read
RST: first detection signal
SEN: the second detection signal
DATA: data-signal
I1: driving current
VDD: system high voltage
VSS: system low-voltage
Vd: drain electrode end
Vg: control terminal
Vs: source terminal
P1, P2: during detection
D1, D2: sensor parameter
800,900: pixel circuit drive method
S810~S860, S910~S960: operation
Specific embodiment
It is hereafter to elaborate for embodiment cooperation attached drawing, but provided embodiment is not to limit disclosure institute
The range covered, and the non-sequence to limit its execution of the description of structure operation, any structure reconfigured by element, institute
The device with impartial technical effect is generated, is all the range that the disclosure is covered.In addition, attached drawing is only for the purpose of description, and
It maps not according to full size.To make to be easy to understand, similar elements or similar components will be with identical symbologies in following the description
To illustrate.
The word (terms) used in full piece specification and claim usually has each in addition to having and especially indicating
Word using in this area, in content disclosed herein with the usual meaning in special content.
About " " used herein " first ", " second ", " third " ... etc., order or cis-position are not especially censured
The meaning, also non-limiting the disclosure, the element described just for the sake of difference with same technique term or operation.
In addition, about " coupling " used herein or " connection ", can refer to two or multiple element mutually directly put into effect
Body is in electrical contact, or mutually puts into effect indirectly body or in electrical contact, is also referred to as two or multiple element mutual operation or movement.
Please refer to Fig. 1.Fig. 1 is a kind of showing for display device 100 shown by the section Example according to present disclosure
It is intended to.As shown in Figure 1, display device includes display panel DP, source electrode driver 120 and gate drivers 140.Display panel DP
Include multiple pixel circuits 160.In structure, display panel DP couples source electrode driver 120 and gate drivers 140.It is specific and
It says, the pixel circuit 160 in display panel DP couples source electrode driver 120 by data line DL1~DLn.In display panel DP
Pixel circuit 160 by scan line SL1~SLn couple gate drivers 140.
Please refer to Fig. 2.Fig. 2 is a kind of showing for pixel circuit 160 shown by the section Example according to present disclosure
It is intended to.As shown in Fig. 2, pixel circuit 160 includes data transistor TD1, driving transistor TD2, the first detection circuit 163, the
Two detection circuits 164 and light-emitting component LED.In some embodiments, pixel circuit 160 also includes capacitor C1.Implement in part
In example, the first detection circuit 163 includes the first transistor T1.Second detection circuit 164 includes second transistor T2.
In structure, the first end electric property coupling data line Dn of data transistor TD1.The second end electricity of data transistor TD1
Property be coupled to driving transistor TD2 control terminal Vg.Drive the drain electrode end Vd electric property coupling system high voltage VDD of transistor TD2.
Drive the source terminal Vs electric property coupling light-emitting component LED of transistor TD2.The first end of capacitor C1 is electrically coupled to driving transistor
The control terminal Vg of TD2.The second end of capacitor C1 is electrically coupled to the source terminal Vs of driving transistor TD2.First detection circuit 163
The first end of the first transistor T1 be electrically coupled to detection line.The second end of the first transistor T1 of first detection circuit 163
The control terminal Vg of electric property coupling driving transistor TD2.The second end electric property coupling of the second transistor T2 of second detection circuit 164
Drive the source terminal Vs of transistor TD2.
In some embodiments, two or the multiple pixel circuits 160 in multiple pixel circuits 160 that display panel DP includes
Each first detection circuit 163 the mutual electric property coupling of first end.Specifically, multiple pixel circuits in display panel DP
160 can be divided into one or more regions according to setting area or practical demand for control, and the pixel circuit 160 positioned at the same area is respective
The mutual electric property coupling of first end of first detection circuit 163.In other words, in multiple pixel circuits 160 that display panel DP includes
Two or multiple pixel circuits 160 pass through share detection line provide first detection signal RST to two or multiple it is corresponding first inspection
Slowdown monitoring circuit 163.
In operation, data transistor TD1 according to scanning signal S1 to selectively turn on, to export number from data line Dn
It is believed that number DATA to driving transistor TD2.Specifically, the first end of data transistor TD1 is to receive number from data line Dn
It is believed that number DATA.The control terminal of data transistor TD1 is to receive scanning signal S1.The second end of data transistor TD1 to
Outputting data signals DATA to the control terminal Vg for driving transistor TD2.
It drives transistor TD2 to be selectively turned on according to data-signal DATA, is driven and sent out with output driving current I1
Optical element LED.Specifically, the drain electrode end Vd of driving transistor TD2 is to receive system high voltage VDD.Drive transistor TD2
Control terminal Vg to receive data-signal DATA.Drive the source terminal Vs of transistor TD2 to output driving current I1 to hair
Optical element LED.
First detection circuit 163 corresponding to reading signal RD to selectively turn on, according to first detection signal RST
The voltage level of the control terminal Vg of control driving transistor TD2.Specifically, the first transistor in the first detection circuit 163
The control terminal of T1 reads signal RD to receive.The first end of the first transistor T1 is to receive first detection signal RST.First
The second end of transistor T1 controls the voltage electricity of the control terminal Vg of driving transistor TD2 to export first detection signal RST
It is flat.
Second detection circuit 164, to be selectively turned on corresponding to reading signal RD, to be exported from data line Dn
The voltage level of the source terminal Vs of second detection signal SEN control driving transistor TD2.Specifically, the second detection circuit 164
In second transistor T2 control terminal to receive read signal RD.The first end of second transistor T2 is to from data line Dn
Receive the second detection signal SEN.The second detection of second end output signal SEN of second transistor T2 is to control driving transistor
The voltage level of the source terminal Vs of TD2.
In addition, source electrode driver 120 is felt to receive the first sensor parameter D1 or the second sensor parameter D2, and according to first
It surveys parameter D1 or the second sensor parameter D2 and adjusts data-signal DATA.
In other words, by adjusting detection transistor connection type, increase a transistor and using read signal RD into
The switching of row on or off, so that data-signal and detection signal can all be transmitted by data line.It is further interior in detail
Appearance will illustrate in subsequent paragraph.
For ease of illustration for the sake of, the concrete operations of each element will be in following paragraphs in the pixel circuit 160 in Fig. 2
Collocation attached drawing is illustrated.Please also refer to Fig. 3 and Fig. 4.Fig. 3 is electricity shown by the section Example according to present disclosure
The schematic diagram of voltage level signal.Fig. 4 is that Fig. 2 in P1 is shown during the first detection according to the section Example of present disclosure
The status diagram of each transistor in pixel circuit 160.
In some embodiments, it as shown in figure 3, scanning signal S1 switchs to low level during the first detection in P1, reads
Signal RD switchs to high level.In addition, first detection signal RST switchs to turn off voltage level, the second detection signal SEN switchs to shine
Voltage level.
As shown in figure 4, receiving low level scanning by the control terminal of data transistor TD1 during the first detection in P1
Signal S1 and turn off.In other words, during the first detection in P1, the second end of data transistor TD1 will not outputting data signals
To the control terminal Vg of driving transistor TD2.
In addition, as shown in figure 4, the first transistor T1 of the first detection circuit 163 is corresponded to during the first detection in P1
Read signal RD conducting, the first detection that driving transistor TD2 is exported corresponding to the first transistor T1 of the first detection circuit 163
Signal RST shutdown.Specifically, being received the reading signal RD of high level by the control terminal of the first transistor T1 and being connected.By
The first end of one transistor T1 receives first detection signal RST.First detection signal is exported by the second end of the first transistor T1
RST to the control terminal Vg for driving transistor TD2, to control the voltage level for the control terminal Vg for driving transistor TD2 in shutdown electricity
Voltage level.
On the other hand, as shown in figure 4, during the first detection in P1, the second transistor T2 phase of the second detection circuit 164
It should be in reading signal RD conducting, light-emitting component LED detects signal SEN conducting corresponding to the second of second transistor T2 output, and
The second sensor parameter D2 to data line Dn is provided, so that data-signal DATA is adjusted corresponding to the second sensor parameter D2.
Specifically, being received the reading signal RD of high level by the control terminal of second transistor T2 and being connected.By the second crystalline substance
The first end of body pipe T2 receives the second detection signal SEN from data line Dn.By the second inspection of second end output of second transistor T2
Survey the first end of the source terminal Vs and light-emitting component LED of signal SEN to driving transistor TD2.By second transistor T2 according to
The voltage level of the first end of the source terminal Vs and light-emitting component LED of two detection signal SEN control driving transistor TD2 is in luminous
Voltage level obtains the second sensor parameter D2 with self-emission device LED.
In some embodiments, the second detection signal SEN can be the signal for progressively increasing voltage level.For example, first
The input voltage measurement driving current I1 of about 1 volt of input is how many, then gradually increases the voltage of input and continue detection driving
Electric current I1, until driving current I1 reaches estimated required amperage.Or, it is assumed that when the voltage of about 1 volt of input, it is contemplated that survey
Measuring should be about 1 ampere of driving current I1, but actual measurement will then reduce input to about 1.2 amperes of driving current
Voltage is to compensate, so that driving current I1 maintains about 1 ampere.
In other parts embodiment, the second detection signal SEN can be constant current.For example, defeated by the second detection circuit 164
Enter fixed current and detects voltage value to obtain the degree of variation of light-emitting component LED.It accordingly, can be by passback sensing signal to repair
Positive signal, so that the brightness of each light-emitting component is consistent.
Then, please also refer to Fig. 3 and Fig. 5.Fig. 5 is shown according to the section Example of present disclosure in the second detection
During Fig. 2 pixel circuit 160 in each transistor status diagram.
In some embodiments, it as shown in figure 3, scanning signal S1 maintains low level during the second detection in P2, reads
Signal RD maintains high level.In addition, first detection signal RST switchs to conduction voltage level, the second detection signal SEN switchs to end
Voltage level.
As shown in figure 5, receiving low level scanning by the control terminal of data transistor TD1 during the first detection in P2
Signal S1 and turn off.In other words, during the second detection in P2, the second end of data transistor TD1 will not outputting data signals
To the control terminal Vg of driving transistor TD2.
In addition, as shown in figure 5, the first transistor T1 by the first detection circuit 163 is corresponding during the second detection in P2
In reading signal RD conducting, driving transistor TD2 is connected corresponding to first detection signal RST, and provides the first sensor parameter D1
To data line Dn, so that data-signal DATA is adjusted corresponding to the first sensor parameter D1.
Specifically, being received the reading signal RD of high level by the control terminal of the first transistor T1 and being connected.By the first crystalline substance
The first end of body pipe T1 receives first detection signal RST.First detection signal RST is exported extremely by the second end of the first transistor T1
The control terminal Vg of transistor TD2 is driven, to control the voltage level of the control terminal Vg of driving transistor TD2.By the first transistor
T1 is controlled according to first detection signal RST drives the voltage level of the control terminal Vg of transistor TD2 in conduction voltage level, with certainly
Transistor TD2 is driven to obtain the first sensor parameter D1.
On the other hand, as shown in figure 5, during the second detection in P2, the second transistor T2 phase of the second detection circuit 164
It should be in reading signal RD conducting, light-emitting component LED is corresponding to the second detection signal SEN cut-off.Specifically, by second transistor
The control terminal of T2 receives the reading signal RD of high level and is connected.The is received from data line Dn by the first end of second transistor T2
Two detection signal SEN.By the source electrode of second end output the second detection signal SEN to driving transistor TD2 of second transistor T2
Hold the first end of Vs and light-emitting component LED.By second transistor T2 according to the second detection signal SEN control driving transistor TD2
Source terminal Vs and light-emitting component LED first end voltage level in blanking voltage level, to end light-emitting component LED.
Accordingly, the electricity of detection driving transistor TD2 when can input different size of signal by the first detection circuit 163
Stream to obtain the degree of variation of driving transistor TD2, then returns sensing signal with revise signal, so that each driving transistor
The driving current I1 that TD2 is generated is consistent.
Then, Fig. 6 is please referred to.Fig. 6 is the picture that Fig. 2 in driving period is shown according to the section Example of present disclosure
The status diagram of each transistor in plain circuit 160.
In some embodiments, in driving period, scanning signal S1 switchs to high level, reads signal RD and switchs to low electricity
It is flat.In addition, the detection of first detection signal RST and second signal SEN is all floating voltage level.
As shown in fig. 6, in driving period, the first transistor T1 of the first detection circuit 163 and the second detection circuit 164
Second transistor T2 shutdown, data transistor TD1 corresponding to scanning signal S1 be connected, and provide data-signal DATA to driving
Transistor TD2, to drive light-emitting component LED.
Specifically, being received low level reading signal RD by the control terminal of the first transistor T1 and being turned off.By the second crystalline substance
The control terminal of body pipe T2 receives low level reading signal RD and turns off.High level is received by the control terminal of data transistor TD1
Scanning signal S1 and be connected.The first end of data transistor TD1 receives data-signal DATA from data line Dn, and by data crystalline substance
The second end outputting data signals DATA of body pipe TD1 to the control terminal Vg for driving transistor TD2.Drive transistor TD2 according to number
It is believed that number DATA is by the source terminal Vs output driving current I1 of driving transistor TD2 to drive light-emitting component LED.
In other words, it in driving period, is connected by data transistor according to scanning signal S1 and by data-signal DATA
By data line Dn write driver transistor TD2, light-emitting component LED is driven with driving current I1.
Please refer to Fig. 7.Fig. 7 is another pixel circuit shown by the other parts embodiment according to present disclosure
160 schematic diagram.It is with identical component symbol table with similar element in the embodiment of Fig. 2 in embodiment illustrated in fig. 7
Show, operates in previous paragraph expositor, repeated no more in this.It is compared with embodiment illustrated in fig. 2, in the present embodiment, knot
On structure, light-emitting component LED is electrically coupled to system high voltage VDD and drives the drain electrode end Vd of transistor TD2.Drive transistor
The source terminal Vs electric property coupling system low-voltage VSS of TD2.The second end of the second transistor T2 of second detection circuit 164 is electrical
The drain electrode end Vd of coupling driving transistor TD2.
It is compared in operation with embodiment illustrated in fig. 2, in the present embodiment, the luminous voltage level of the second detection signal SEN
It is opposite with the height of blanking voltage level.Specifically, the P1 during the first detection, the second detection signal SEN is located at the electricity that shines
Voltage level is the voltage level or constant current gradually to drag down.The P2 during the second detection, the second detection signal SEN are located at cut-off
Voltage level is for high-voltage level.
In this way, which light-emitting component LED can be selected to the voltage level of the drain electrode end Vd according to driving transistor TD2
Be connected to property.Second detection circuit 164 can be to selectively turn on corresponding to reading signal RD, with from data line Dn
The voltage level of the drain electrode end Vd of output the second detection signal SEN control driving transistor TD2.Specifically, the second detection electricity
The control terminal of second transistor T2 in road 164 reads signal RD to receive.The first end of second transistor T2 is to number certainly
The second detection signal SEN is received according to line Dn.The second detection signal SEN of second end output of second transistor T2 is brilliant to control driving
The voltage level of the drain electrode end Vd of body pipe TD2.
Please refer to Fig. 8.Fig. 8 is that a pixel circuit drive method 800 is shown according to the section Example of present disclosure
Flow chart.For convenience and for the sake of clear explanation, following pixel circuit drive methods 800 are cooperation FIG. 1 to FIG. 6 illustrated embodiments
It is illustrated, but not limited to this, anyone skilled in the art, is not departing from spirit and scope of the present disclosure, when can be right
Make various variations and retouching.As shown in figure 8, pixel circuit drive method 800 includes operation S810~S860.
Firstly, being selectively turned on by the first detection circuit 163 corresponding to signal RD is read, in operation S810 with root
The voltage level of the control terminal Vg of driving transistor TD2 is controlled according to first detection signal RST.
Then, in operation S820, by driving transistor TD2 according to the voltage level of the control terminal Vg of driving transistor TD2
First sensor parameter D1 is provided.
Then, it in operation S830, is selectively turned on by the second detection circuit 164 corresponding to signal RD is read, with basis
The voltage level of the source terminal Vs of second detection signal SEN control driving transistor TD2.
Then, it in operation S840, is mentioned by light-emitting component LED according to the voltage level of the source terminal Vs of driving transistor TD2
For the second sensor parameter D2.
Then, it in operation S850, is adjusted by source electrode driver 120 according to the first sensor parameter D1 and the second sensor parameter D2
Data-signal DATA.
Finally, being selectively turned on by data transistor TD1 according to scanning signal S1 in operation S860, with from data line
Dn outputting data signals DATA to driving transistor TD2 is to drive light-emitting component LED.
Please refer to Fig. 9.Fig. 9 is that a pixel circuit drive method 900 is shown according to the section Example of present disclosure
Flow chart.For convenience and for the sake of clear explanation, following pixel circuit drive methods 900 are that cooperation embodiment illustrated in fig. 7 carries out
Illustrate, but not limited to this, anyone skilled in the art, is not departing from spirit and scope of the present disclosure, when can be each to making
Kind changes and retouching.As shown in figure 9, pixel circuit drive method 900 includes operation S910~S960.In embodiment illustrated in fig. 9
In, similar operation is indicated with identical number of steps with the embodiment of Fig. 8, it operates in previous paragraph expositor,
It is repeated no more in this.
It is compared with embodiment illustrated in fig. 8, in the present embodiment, in operation S930, by the second detection circuit 164 corresponding to reading
The number of winning the confidence RD is selectively turned on, according to the voltage electricity of the drain electrode end Vd of the second detection signal SEN control driving transistor TD2
It is flat.In operation S940, the second sensing is provided according to the voltage level of the drain electrode end Vd of driving transistor TD2 by light-emitting component LED
Parameter D2.
How skilled artisan can be directly acquainted with this pixel circuit drive method 800,900 based on above-mentioned more
Source electrode driver 120 and pixel circuit 160 in a difference embodiment is to execute the operation and function, and therefore, not repeat them here.
In conclusion passing through the first newly-increased detection circuit in the pixel circuit 160 and display device of present disclosure
The switching of 163 and reading signal RD, so that data-signal and detection signal can all be transmitted by data line.In this way, i.e.
Compensation data can be carried out under the design without increasing packaging pin (COF pin) or newly-increased multiplexer (mux).
Although the disclosure is disclosed as above with embodiment, so it is not limited to the disclosure, and any this field tool is logical
Normal skill is not departing from spirit and scope of the present disclosure, when can make various variation and retouching, therefore the protection of the disclosure
Range is subject to view appended claims institute defender.
Claims (20)
1. a kind of pixel circuit, includes:
One driving transistor, to be selectively turned on according to a data-signal, to export the luminous member of driving current driving one
Part；
One data transistor, to be selectively turned on according to scan signal, to export the data-signal extremely from a data line
The driving transistor；
One the first transistor, to be connected corresponding to a reading signal-selectivity, to be somebody's turn to do according to first detection signal control
Drive the voltage level of a control terminal of transistor；And
One second transistor, to be connected corresponding to the reading signal-selectivity, to be detected from data line output one second
Signal controls the voltage level of the source-side of the driving transistor.
2. pixel circuit as described in claim 1, also includes:
One capacitor, a first end of the capacitor are electrically connected at the control terminal of the driving transistor, a second end of the capacitor
It is electrically connected at the source terminal of the driving transistor.
3. pixel circuit as described in claim 1, wherein during Yu Yi first is detected, the first transistor and second crystalline substance
Body pipe corresponds to the reading signal conduction, which turns off corresponding to the first detection signal, and the light-emitting component is corresponding
In the second detection signal conduction, and provide one second sensor parameter to the data line so that the data-signal corresponding to this
The adjustment of two sensor parameters.
4. pixel circuit as described in claim 1, wherein during Yu Yi second is detected, the first transistor and second crystalline substance
Body pipe corresponds to the reading signal conduction, and for the light-emitting component corresponding to the second detection signal cut-off, the driving transistor is corresponding
Be connected in the first detection signal, and provide one first sensor parameter to the data line so that the data-signal corresponding to this
The adjustment of one sensor parameter.
5. pixel circuit as described in claim 1, wherein in a driving period, the first transistor and the second transistor
Shutdown, the data transistor are connected corresponding to the scanning signal, and provide the data-signal to the driving transistor, are somebody's turn to do with driving
Light-emitting component.
6. a kind of display device, includes:
One display panel includes multiple pixel circuits, and any one of the pixel circuit includes:
One driving transistor, to be selectively turned on according to a data-signal, to export the luminous member of driving current driving one
Part；
One data transistor, to be selectively turned on according to scan signal, to export the data-signal extremely from a data line
The driving transistor；
One first detection circuit, to be connected corresponding to a reading signal-selectivity, to be controlled according to a first detection signal
The voltage level of one control terminal of the driving transistor；And
One second detection circuit, to be connected corresponding to the reading signal-selectivity, to be examined from data line output one second
Survey the voltage level that signal controls the source-side of the driving transistor；And
One source driver couples the pixel circuit, to receive first sensor parameter or second sensor parameter, and root
The data-signal is adjusted according to first sensor parameter or second sensor parameter.
7. display device as claimed in claim 6, wherein any one of the pixel circuit also includes:
One capacitor, a first end of the capacitor are electrically connected at the control terminal of the driving transistor, a second end of the capacitor
It is electrically connected at the source terminal of the driving transistor.
8. display device as claimed in claim 6, wherein
One drain electrode end of the driving transistor is to receive a system high voltage, and the control terminal of the driving transistor is to receive
The data-signal, the source terminal of the driving transistor to export the driving current to the light-emitting component,
One control terminal of the data transistor couples the data to receive the scanning signal, a first end of the data transistor
Line and to receive the data-signal, a second end of the data transistor couple the control terminal of the driving transistor and to
Export the data-signal.
9. display device as claimed in claim 6, wherein first detection circuit includes:
One the first transistor, a control terminal of the first transistor is to receive the reading signal, and the one of the first transistor
One end couples the control terminal of the driving transistor to receive the first detection signal, a second end of the first transistor.
10. display device as claimed in claim 6, wherein second detection circuit includes:
One second transistor, a control terminal of the second transistor is to receive the reading signal, and the one of the second transistor
One end couples the data line and to receive the second detection signal, and a second end of the second transistor couples the driving crystal
The source terminal of pipe.
11. display device as claimed in claim 6, wherein during one first detection, which is corresponded to
The reading signal conduction, with controlled according to the first detection signal driving transistor the control terminal voltage level to turn off
The driving transistor, second detection circuit correspond to the reading signal conduction, to control the drive according to the second detection signal
The voltage level of the source terminal of dynamic transistor is to obtain second sensor parameter from the light-emitting component.
12. display device as claimed in claim 6, wherein during one second detection, which is corresponded to
The reading signal conduction, with according to this second detection signal control the driving transistor the source terminal voltage level to end
The light-emitting component, which corresponds to the reading signal conduction, to control the driving according to the first detection signal
The voltage level of the control terminal of transistor is to obtain first sensor parameter from the driving transistor.
13. display device as claimed in claim 6, wherein in a driving period, first detection circuit and second inspection
Slowdown monitoring circuit is turned off according to the reading signal, which, which is connected corresponding to the scanning signal and exports the data-signal, extremely should
Transistor is driven, to drive the light-emitting component.
14. display device as claimed in claim 6, wherein two or multiple pixel circuits in the pixel circuit pass through one
Shared detection line provides the first detection signal to first detection circuit.
15. a kind of pixel circuit drive method, includes:
It is connected by one first detection circuit corresponding to a reading signal-selectivity, to be driven according to first detection signal control one
The voltage level of one control terminal of dynamic transistor；
One first sensor parameter is provided according to the voltage level of the control terminal of the driving transistor by the driving transistor；
It is connected by one second detection circuit corresponding to the reading signal-selectivity, to control the drive according to one second detection signal
The voltage level of the source-side of dynamic transistor；
One second sensor parameter is provided according to the voltage level of the source terminal of the driving transistor by a light-emitting component；
One data-signal is adjusted according to first sensor parameter and second sensor parameter by one source driver；And
Selectively turned on by a data transistor according to scan signal, with export the data-signal to the driving transistor with
Drive a light-emitting component.
16. pixel circuit drive method as claimed in claim 15, wherein also include:
During one first detection, which is corresponded to by first detection circuit and second detection circuit,
It is turned off by the driving transistor corresponding to the first detection signal, which is corresponded to simultaneously by the light-emitting component
Second sensor parameter is provided.
17. pixel circuit drive method as claimed in claim 15, wherein also include:
During one second detection, which is corresponded to by first detection circuit and second detection circuit,
By the light-emitting component corresponding to the second detection signal cut-off, be connected simultaneously by the driving transistor corresponding to the first detection signal
First sensor parameter is provided.
18. pixel circuit drive method as claimed in claim 15, wherein also include:
In a driving period, turned off by first detection circuit and second detection circuit corresponding to the reading signal, by this
Data transistor is connected corresponding to the scanning signal and exports the data-signal to the driving transistor, to drive the member that shines
Part.
19. pixel circuit drive method as claimed in claim 15, wherein also include:
During one first detection, by first detection circuit control the voltage level of the control terminal of the driving transistor in
One shutdown voltage level, and the voltage level for the source terminal for controlling the driving transistor by second detection circuit shines in one
Voltage level.
20. pixel circuit drive method as claimed in claim 15, wherein also include:
During one second detection, by first detection circuit control the voltage level of the control terminal of the driving transistor in
One conduction voltage level, and the voltage level of the source terminal of the driving transistor is controlled in a cut-off by second detection circuit
Voltage level.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107136590 | 2018-10-17 | ||
| TW107136590A TWI682381B (en) | 2018-10-17 | 2018-10-17 | Pixel circuit, display device and pixel circuit driving method |
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| CN109523946A true CN109523946A (en) | 2019-03-26 |
| CN109523946B CN109523946B (en) | 2021-07-30 |
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Also Published As
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| TWI682381B (en) | 2020-01-11 |
| CN109523946B (en) | 2021-07-30 |
| TW202016919A (en) | 2020-05-01 |
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