CN1490781A - Driving circuit of luminescent assemblage and method thereof - Google Patents
Driving circuit of luminescent assemblage and method thereof Download PDFInfo
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- CN1490781A CN1490781A CNA021462399A CN02146239A CN1490781A CN 1490781 A CN1490781 A CN 1490781A CN A021462399 A CNA021462399 A CN A021462399A CN 02146239 A CN02146239 A CN 02146239A CN 1490781 A CN1490781 A CN 1490781A
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Abstract
The present invention is a driving circuit of light emitting assembly, comprising a driving transistor with a gate. A light emitting assembly is connected in series to said driving transistor to constitute a light emitting path, wherein the on / off states of the transistor determine the on / off states of the light emitting path. A source of a first transistor is connected to a data line, its drain is connected to said gate of the transistor and its gate is connected to a first scanning line. A source of a second transistor is connected to a low reference voltage, its drain is connected to the gate of the transistor and its gate is connected to a second scanning line. In this case, a clock pulse of the second scanning line has the same frequency as that of the first one, but the second scanning line has a delay with respect to the first one. A sustain capacitor is connected to the gate of the driving transistor to sustain a voltage state.
Description
Technical field
The invention relates to a kind of luminescence component display technique.Particularly (active matrix organic light emitting diode, Driving technique AMOLED) is to increase its critical voltage (Threshold voltage) stability in time about a kind of active organic light-emitting display.
Background technology
Along with high-tech development, video product, particularly digitized video or device for image become in general daily life common product.In these digitized videos or the device for image, display is a significant components, to show relevant information.The user can read information by display, or and then the running of control device.
In order to cooperate modern life pattern, it is thin light that the volume of video or device for image day by day is tending towards.Traditional cathode-ray tube, though still have its advantage, it need take large volume and power consumption.Therefore, cooperate photoelectric technology and semiconductor fabrication, the display of panel type has been developed to become common display product, for example LCD or active organic light-emitting display at present.
The technology of LCD has developed to be had for many years, and being has breakthrough with difficulty.Right active organic light-emitting display technique is the new development technology, can become the main flow of display with LCD future.The characteristic of the maximum of active organic light-emitting display is to utilize the TFT technology to drive Organic Light Emitting Diode, and drive IC is directly manufactured on panel, reach the demand that volume is compact and reduce cost, can be used on the small-medium size panels such as mobile phone, PDA, digital camera and handheld game device, Portable DVD player and vehicle navigation device, in the future even can be used in large size panel such as computing machine and flat-surface television etc.
For digitized display, it is characterized in that its display screen, arrange with dot matrix way and constitute by some pixels.In order to control other pixel cell, it generally passes through one scan line and a data line, choosing specific pixel, and imposes on suitable operating voltage, to show the video data of this pixel of correspondence.Fig. 1 illustrate is into traditionally, and corresponding to a pixel wherein, it drives the circuit diagram of Organic Light Emitting Diode.Please refer to Fig. 1, this driving circuit comprises a transistor 100 and transistor 102.Transistor for example be thin film transistor (TFT) (thin filmtransistor, TFT).The grid of transistor 100 is connected in sweep trace, and in suitable time clock, receive scan voltage Vscan, and its one source pole can receive a data voltage Vdata who is delivered to by data line when this time clock.The drain electrode of transistor 100 is connected with the grid of transistor 102.Generally speaking transistorized source electrode and drain electrode are interchangeable.In this instructions, only be to get it to be example, as illustrative purposes.In addition, a storage capacitors 106 is connected between the grid and a ground voltage of transistor 102.The drain electrode of transistor 102 then is connected in a voltage source V
DD, and the source electrode of transistor 102 is serially connected with the anode of an organic luminescent assembly 104 in addition, and the negative electrode of organic luminescent assembly 104 is connected in a relative low-voltage V
SS
In the driving circuit of above-mentioned Fig. 1, its principle of operation is as follows.When the grid of transistor 100 received the scanning voltage Vscan of sweep trace and is switched on, data voltage Vdata was just by the grid of transistor 100 input transistors 100, and also turn-on transistor 102.This moment voltage source V
DDCan flow into organic luminescent assembly 104 through transistor 102, impel it luminous.General transistor 102 is called driven unit again.When circuit operation, sweep trace time clock Vscan can input to transistor 100 with a frequency of setting, and the period between its time clock (clock pulse) and the time clock is called a frame (frame).When a predetermined image data square (data block) in the time of a frame can input to corresponding pixel.When the time clock activating transistor 100 of sweep trace Vscan, data voltage Vdata is also activating transistor 102 then, and data voltage Vdata also is stored in storage capacitors 106 simultaneously, to keep the unlatching of transistor 102.
Therefore, organic luminescent assembly 104 in any frame, all is to be in opening traditionally.And its variation only is when different frame, along with data voltage Vdata has different display gray shade value (gray scale).In other words, on traditional design, the luminescence component of TFT-active organic light-emitting display (TFT-AMOLED) keeps luminance always.This kind illumination mode, tradition is to meet image display effect, to prevent film flicker.And for luminescence component is driven always, transistor 102 also must be kept the state of unlatching relatively.Yet general transistor 102, particularly thin film transistor (TFT) 102, and under operating for a long time, its characteristic for example critical voltage Vth can become big in time, as shown in Figure 2.Therefore can influence the luminance of luminescence component, for example brightness or the variation of chroma.It is because of the skew of critical voltage Vth, the effect that is caused, and this cooperates relation of thin film transistor (TFT) as follows to driving circuit.
When organic luminescence component 104 is activated, the drive current I of thin film transistor (TFT)
DRelation with formula (1)-(2):
Wherein, k is a characteristic constant of thin film transistor (TFT).Can find out by above-mentioned formula (1)-(2), when critical voltage Vth becomes big with long-time unlatching, the drive current I of the organic luminescent assembly 104 of flowing through
DAlong with diminishing, therefore influence the luminescent condition of organic luminescent assembly 104, brightness decreases.And the life-span of organic luminescent assembly 104 also is to determine according to its luminous power.Therefore the variation meeting of critical voltage Vth causes considerable influence to organic luminescent assembly 104.
Summary of the invention
In view of this, the invention provides a kind of driving circuit of luminescence component, can make the critical voltage Vth of driving transistors, under long-time image display operation, still can keep a stationary value, show the quality of product with effective increase.
The invention provides a kind of driving circuit of luminescence component, except can accepting a normal scanning-line signal, accept another scanning-line signal again, but one delay is arranged for normal scanning-line signal.When this another scanning-line signal was opened the driving circuit of luminescence component, a discharge low-voltage replaced the normal images data, and closes driving transistors, made its critical voltage Vth initial value of resetting back.
The driving circuit of luminescence component provided by the invention applicable to an active organic light-emitting display, comprises a driving transistors, has a grid to be connected to a node.One luminescence component is serially connected with aforementioned driving transistors, constitute a light emitting path, wherein aforementioned light emitting path is connected between a system high voltage and the system low-voltage, and when aforementioned driving transistors was unlocked, the aforementioned luminescence component of aforementioned system high voltage drive was with luminous.One keeps electric capacity, is connected in aforementioned nodes, can keep aforementioned driving transistors and be unlocked.One system drive path comprises that also a first transistor is connected in series through aforementioned nodes with a transistor seconds, wherein a grid of aforementioned the first transistor receives one first scan clock pulse, one grid of aforementioned the first transistor receives one second scan clock pulse, the aforementioned first scan clock pulse has an identical frequency with the aforementioned second scan clock pulse, but the aforementioned first scan clock pulse of the aforementioned second scan clock ratio of pulse length to the total cycle length has a time delay.
Wherein, when a plurality of continuous impulses of the first scan clock pulse are opened aforementioned the first transistor, it allows the data voltage corresponding to a frame, be input into aforementioned nodes, open aforementioned driving transistors with control, carry out an image and show, again when a plurality of continuous impulses of the second scan clock pulse are opened aforementioned transistor seconds, its permission one is closed voltage and is input into aforementioned nodes, to close aforementioned driving transistors.
In above-mentioned, closing voltage is a negative voltage, can impel and close aforementioned driving transistors, also makes to keep electric capacity generation discharge, and is reduced to an electronegative potential.
The present invention proposes a kind of driving circuit of luminescence component in addition again, comprises that a driving transistors has a grid.One luminescence component is serially connected with aforementioned driving transistors, constitutes a light emitting path, an open/close state of aforementioned driving transistors wherein, the conducting that also determines aforementioned light emitting path with close.One the first transistor has one source pole to be connected to a data line, and a drain electrode is connected to the aforementioned grid of aforementioned driving transistors, and a grid is connected to one first sweep trace.One transistor seconds, there is one source pole to be connected to a low reference voltage, one drain electrode is connected to the aforementioned grid of aforementioned driving transistors, and one grid be connected to one second sweep trace, one time clock of wherein aforementioned second sweep trace and a time clock of aforementioned first sweep trace have same frequency, but aforementioned second sweep trace has a time delay to aforementioned first sweep trace.One keeps electric capacity, is connected in the aforementioned grid of aforementioned drive thin film transistors, can keep a voltage status.
In above-mentioned, low reference voltage is a negative voltage, can impel and close driving transistors, also makes to keep electric capacity generation discharge, and is reduced to an electronegative potential.
The present invention also proposes a kind of driving method of luminescence component in addition again, for a drive circuit for luminous component, it comprises a luminescence unit and an oxide-semiconductor control transistors, wherein aforementioned oxide-semiconductor control transistors receives the control of an one scan line and a data line, and exports the input end that a control signal is given aforementioned luminescence unit.Method of the present invention comprises provides a replacement assembly, can a time clock export a voltage signal.Set the aforementioned time clock of aforementioned replacement assembly, make it identical frequency be arranged, but arranged a time delay with a time clock of aforementioned sweep trace.According to the aforementioned time clock of the aforementioned replacement assembly of setting, output aforesaid voltage signal is given the aforementioned input end of aforementioned luminescence unit, and it is luminous to impel aforementioned luminescence unit temporarily to stop.
Description of drawings
Fig. 1 illustrate traditionally for a pixel wherein, it drives the circuit diagram of Organic Light Emitting Diode.
The critical voltage that Fig. 2 illustrates driving transistors traditionally changes synoptic diagram with open-interval.
The critical voltage that Fig. 3 illustrates according to driving transistors of the present invention changes synoptic diagram with open-interval.
Fig. 4 illustrates according to of the present invention for a pixel wherein, the circuit diagram of its driven for emitting lights assembly.
Fig. 5 illustrates according to the present invention, according to the circuit of the driven for emitting lights assembly of Fig. 4, two sweep traces of its correspondence, its sequential relationship.
Label declaration:
100,102,108: thin film transistor (TFT)
106: electric capacity
104: luminescence component
Embodiment
One of principal character of the present invention is to utilize first sweep signal and second sweep signal, and to control the driving circuit of a luminescence component, wherein first sweep signal normally activates the driving circuit of luminescence component, accepting the image data signal, and show image.When second sweep signal activated the driving circuit of luminescence component, a discharge or reset voltage signal replacement image data signal impelled driving circuit to reset.And then critical voltage can return to initial value.Therefore, critical voltage still can keep a stationary value with the continuity of running time.
The present invention, with regard to the characteristic of ocular vision for considering.Under the situation that does not influence visual effect, blink, with the driving transistors of luminescence component, for example thin film transistor (TFT) cuts out, and its critical voltage can be reset, so critical voltage does not have long-time activation, the non-migration and critical voltage can tend towards stability.
By medical report, eyes persist effect.When the flicker frequency of image was higher than 60hz, eyes can not experienced the flicker situation.In other words, for example at general light under a-c cycle 60hz, eyes are differentiated to go out the light situation of glimmering.When a frame during at show image, if during the variation of the fast too frame of of short duration variation, the luminescence component of the pixel that it is corresponding is closed, and then eyes can not experienced its dark film flicker situation that produces because of closing, though total brightness may lower.Yet the attenuating of brightness can be easily through an adjustment, with the brightness of compensation expectation.Compare, its problem belongs to the degree than next.
Fig. 3 illustrates according to the present invention, the synoptic diagram that the critical voltage of driving transistors changes with open-interval.Compared to the operation of the conventional ADS driving circuit of Fig. 2, its critical voltage can increase along with the running time of display and become big.Otherwise the present invention can reach a stable critical voltage.In order to obtain stable critical voltage Vth, the present invention changes the design of conventional ADS driving circuit, as shown in Figure 4.
Fig. 4 illustrates according to the present invention, for a pixel wherein, and the circuit diagram of its driven for emitting lights assembly.Transistor 100,102, luminescence component 104, and it is similar with traditional circuit such as Fig. 1 to keep electric capacity 106.Transistor 100,102 can comprise thin film transistor (TFT), and also can comprise a N type thin film transistor (TFT) or a P type thin film transistor (TFT) in design.In addition, but the bottom electrode of keeping electric capacity 106 also can be connected in node A except ground connection.This node A promptly is the drain electrode of transistor 102.Luminescence component 104 can comprise for example Organic Light Emitting Diode.The effect of keeping electric capacity 106 is to open/close state in order to what keep transistor 102.For example, when transistor 102 was opened in the noble potential pulse of sweep trace VscanA, its magnitude of voltage also can be to keeping electric capacity 106 chargings.When sweep trace VscanA changes to electronegative potential, to keep electric capacity 106 and can continue to open transistor 102, it is luminous that luminescence component 104 is continued.
The present invention is directed to the luminescence unit of control Driver Circuit in addition, propose different designs.As traditional driving circuit, can comprise transistor 100 basically, to accept the control of sweep trace VsacnA and data line Vdata, with display image.Its principle of operation is the same with traditional approach to be repeated no more.
Yet the present invention is in the Node B part, and also design connects a transistor 108.The drain electrode of this transistor 108 is connected in Node B, and is corresponding with data line Vdata symmetric mode, and grid then is connected in another sweep trace VscanB.And source electrode is connected in a relative low-voltage Vref2, and it for example can be a negative voltage.With regard to function, low-voltage Vref2 can be considered as a kind of sparking voltage again relatively, closes voltage or a kind of reset voltage.Its function is further described in down.
Above-mentioned, sweep trace VscanB has identical frequency with sweep trace VscanA, but VscanB must for VscanA have one time delay dT, as shown in Figure 5.Can be an arbitrary mark of a frame time delay.But in order to make the working control operation be easier to carry out, time delay, dT can be set at T/n, and wherein T is the time of a frame, and n is the positive integer greater than 1, so time delay, dT for example can be T/2, T/3, and T/4 ... or the like.
When the time clock of VscanA was opened transistor 100, transistor 108 was in closed condition corresponding to VscanB.Therefore, relative low-voltage Vref2 can't influence the control of data line Vdata.Therefore corresponding pixel can make luminescence component 104 send the luminosity and the chroma of expectation according to Vdata.
When the time clock of VscanA is passed through, and the pulse of sweep trace VscanB was put the time delay of setting, activating transistor 108.At this moment, because of transistor 100 is closed, therefore can not influence Vdata.Yet because transistor 108 is opened, low-voltage Vref2 just can be inputed to transistor 102 and be kept electric capacity 106 by Node B relatively.At this moment, because the magnitude of voltage of voltage Vref2 is in electronegative potential, be preferably a negative potential, but also can be a lower positive potential, transistor 102 can be closed, and the voltage of keeping electric capacity 106 simultaneously can be discharged, and moves voltage Vref2 value to.At this moment, because transistor 102 is closed, therefore its critical voltage Vth can be reset and get back to initial value, and can not continue to rise as shown in Figure 2 in the tradition.Therefore transistor 102 is closed, and up to second frame, activates and imports through the next pulse of sweep trace VscanA.
When transistor 102 is closed, the effect of its generation is that luminescence component 104 is closed, and it generally for example can cause a complete dark frame.But discuss as the aforementioned,, with regard to human eye, can not feel film flicker because the frequency of dark picture equates to be 60Hz for example with frame.Its possible influence only is weakening slightly of total brightness, but also can not cause too big puzzlement.And its brightness also can utilize other method to compensate solution easily.Compared with the influence that variation caused, will belong to secondary effect because of critical voltage Vth.Again, also can appropriateness increase time delay, make and reduce during dark entirely, and be enough to reset transistor 102 and get final product.The phenomenon that total brightness reduces can be through a compensation adjustment, and can solve easily.
According to the feature of foregoing description, the present invention mainly is to increase the design that transistor 108 cooperates sweep trace VscanB.With regard on the general utility functions, transistor 108 can be considered a replacement assembly, accepts the control of a time clock, gets final product with the of short duration driving circuit of closing.
According to above-mentioned, it is as follows that the present invention has some advantages:
1, the present invention utilizes first sweep signal and second sweep signal, and to control the driving circuit of a luminescence component, wherein first sweep signal normally activates the driving circuit of luminescence component, accepting the image data signal, and show image.When second sweep signal activated the driving circuit of luminescence component, a discharge or reset voltage signal replacement image data signal impelled driving circuit to reset.And then critical voltage can return to initial value.Therefore, critical voltage still can keep a stationary value with the continuity of running time.
2, the invention provides a kind of driving circuit of luminescence component, can make the critical voltage Vth of driving transistors, under long-time image display operation, still can keep a stationary value, show the quality of product with effective increase.
3, the invention provides a kind of driving method of luminescence component, except can accepting a normal scanning-line signal, accept another scanning-line signal again, but one delay is arranged for normal scanning-line signal.When this another scanning-line signal was opened the driving circuit of luminescence component, a discharge low-voltage replaced the normal images data, and closes driving transistors, made its critical voltage Vth initial value of resetting back.
In sum; though the present invention with a preferred embodiment openly as above; right its is not in order to limit the present invention; anyly be familiar with this operator; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention defines and is as the criterion when looking claims.
Claims (19)
1, a kind of driving circuit of luminescence component applicable to an active organic light-emitting display, is characterized in that: comprising:
One driving transistors has a grid to be connected to a node;
One luminescence component is serially connected with this driving transistors, constitutes a light emitting path, and wherein this light emitting path is connected between a system high voltage and the system low-voltage, and when this driving transistors was unlocked, this system high voltage drove this luminescence component with luminous;
One keeps electric capacity, is connected in this node, can keep this driving transistors and be unlocked or close;
One system drive path, comprise that a first transistor is connected in series through this node with a transistor seconds, wherein a grid of this first transistor receives one first scan clock pulse, one grid of this first transistor receives one second scan clock pulse, this first scan clock pulse has an identical frequency with this second scan clock pulse, but this first scan clock pulse of this second scan clock ratio of pulse length to the total cycle length has a time delay
Wherein, when a plurality of continuous impulses of the first scan clock pulse were opened this first transistor, the data voltage that it allows corresponding to a frame was input into this node, opened this driving transistors with control, and carry out an image and show,
Wherein, when a plurality of continuous impulses of the second scan clock pulse were opened this transistor seconds, its permission one was closed voltage and is input into this node, to close this driving transistors.
2, the driving circuit of luminescence component as claimed in claim 1 is characterized in that: this luminescence component comprises an Organic Light Emitting Diode.
3, the driving circuit of luminescence component as claimed in claim 1 is characterized in that: be T/n this time delay of this this first scan clock pulse of second scan clock ratio of pulse length to the total cycle length, and wherein T is the period T of this first scan clock pulse, and n is the positive integer greater than 1.
4, the driving circuit of luminescence component as claimed in claim 1 is characterized in that: this driving transistors is a N type thin film transistor (TFT) and the two one of P type thin film transistor (TFT).
5, the driving circuit of luminescence component as claimed in claim 1 is characterized in that: this first transistor and this transistor seconds are a N type thin film transistor (TFT) and the two one of P type thin film transistor (TFT).
6, the driving circuit of luminescence component as claimed in claim 1 is characterized in that: this is closed voltage and comprises a positive voltage.
7, the driving circuit of luminescence component as claimed in claim 1 is characterized in that: this is closed voltage and comprises a negative voltage.
8, a kind of luminescence component and driving circuit is characterized in that: comprising:
One driving transistors has a grid;
One luminescence component is serially connected with this driving transistors, constitutes a light emitting path, an open/close state of this driving transistors wherein, the conducting that also determines this light emitting path with close;
One the first transistor has one source pole to be connected to a data line, and a drain electrode is connected to this grid of this driving transistors, and a grid is connected to one first sweep trace;
One transistor seconds, there is one source pole to be connected to a low reference voltage, one drain electrode is connected to this grid of this driving transistors, and one grid be connected to one second sweep trace, wherein a time clock of a time clock of this second sweep trace and this first sweep trace has same frequency, but this second sweep trace has a time delay to this first sweep trace;
One keeps electric capacity, is connected in this grid of this drive thin film transistors, can keep a voltage status.
9, the driving circuit of luminescence component as claimed in claim 8 is characterized in that: this luminescence component comprises an Organic Light Emitting Diode.
10, the driving circuit of luminescence component as claimed in claim 8 is characterized in that: be T/n this time delay of this this first scan clock pulse of second scan clock ratio of pulse length to the total cycle length, and wherein T is the period T of this first scan clock pulse, and n is the positive integer greater than 1.
11, the driving circuit of luminescence component as claimed in claim 8 is characterized in that: this driving transistors is a N type thin film transistor (TFT) and the two one of P type thin film transistor (TFT).
12, the driving circuit of luminescence component as claimed in claim 8 is characterized in that: this first transistor and this transistor seconds are a N type thin film transistor (TFT) and the two one of P type thin film transistor (TFT).
13, the driving circuit of luminescence component as claimed in claim 8 is characterized in that: this low reference voltage that this transistor seconds connected comprises a positive voltage, can impel and close this driving transistors.
14, the driving circuit of luminescence component as claimed in claim 8 is characterized in that: this low reference voltage that this transistor seconds connected comprises a negative voltage, can impel and close this driving transistors.
15, a kind of driving method of luminescence component, for a drive circuit for luminous component, it comprises a luminescence unit and an oxide-semiconductor control transistors, it is characterized in that: this oxide-semiconductor control transistors receives the control of an one scan line and a data line, and export the input end that a control signal is given this luminescence unit, this method comprises:
One replacement assembly is provided, can a time clock exports a voltage signal;
Set this time clock of this replacement assembly, make it identical frequency be arranged, but arranged a time delay with a time clock of this sweep trace;
According to this time clock of this replacement assembly of setting, export this input end that this voltage signal is given this luminescence unit, it is luminous to impel this luminescence unit temporarily to stop.
16, the driving method of luminescence component as claimed in claim 15 is characterized in that: this voltage signal of this replacement assembly comprises a sparking voltage.
17, the driving method of luminescence component as claimed in claim 15 is characterized in that: this voltage signal impels in this luminescence unit, controls the temporary close of a driving transistors of a luminescence component.
18, the driving method of luminescence component as claimed in claim 15 is characterized in that: when this time clock of this sweep trace input activates this oxide-semiconductor control transistors, make an image data of this data line, can be transfused to this luminescence unit, with display image.
19, the driving method of luminescence component as claimed in claim 18 is characterized in that: when this voltage signal of this replacement assembly inputed to this luminescence unit, this luminescence unit was reset.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA021462399A CN1490781A (en) | 2002-10-15 | 2002-10-15 | Driving circuit of luminescent assemblage and method thereof |
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| CNA021462399A CN1490781A (en) | 2002-10-15 | 2002-10-15 | Driving circuit of luminescent assemblage and method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100346387C (en) * | 2004-09-08 | 2007-10-31 | 友达光电股份有限公司 | Organic light-emitting display and its display unit |
| CN100403383C (en) * | 2005-06-27 | 2008-07-16 | 友达光电股份有限公司 | Display unit, array display device, display panel and method for controlling display unit |
| CN100412935C (en) * | 2006-05-18 | 2008-08-20 | 友达光电股份有限公司 | Organic electroluminescent display device driving circuit and driving method |
| CN101409040B (en) * | 2007-10-12 | 2010-12-15 | 奇景光电股份有限公司 | Pixel circuit |
| CN104596659A (en) * | 2014-12-09 | 2015-05-06 | 友达光电股份有限公司 | Temperature sensing circuit of display, display and operation method thereof |
| CN107644613A (en) * | 2017-10-16 | 2018-01-30 | 京东方科技集团股份有限公司 | Display drive method, display drive apparatus and display module |
| CN113948032A (en) * | 2021-02-03 | 2022-01-18 | 友达光电股份有限公司 | Pixel circuit and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100346387C (en) * | 2004-09-08 | 2007-10-31 | 友达光电股份有限公司 | Organic light-emitting display and its display unit |
| CN100403383C (en) * | 2005-06-27 | 2008-07-16 | 友达光电股份有限公司 | Display unit, array display device, display panel and method for controlling display unit |
| CN100412935C (en) * | 2006-05-18 | 2008-08-20 | 友达光电股份有限公司 | Organic electroluminescent display device driving circuit and driving method |
| CN101409040B (en) * | 2007-10-12 | 2010-12-15 | 奇景光电股份有限公司 | Pixel circuit |
| JP2022171691A (en) * | 2013-12-10 | 2022-11-11 | 株式会社半導体エネルギー研究所 | Semiconductor device and electronic apparatus |
| JP7191267B2 (en) | 2013-12-10 | 2022-12-16 | 株式会社半導体エネルギー研究所 | Semiconductor equipment, electronic equipment |
| JP7366228B2 (en) | 2013-12-10 | 2023-10-20 | 株式会社半導体エネルギー研究所 | Semiconductor equipment, electronic equipment |
| CN104596659A (en) * | 2014-12-09 | 2015-05-06 | 友达光电股份有限公司 | Temperature sensing circuit of display, display and operation method thereof |
| CN107644613A (en) * | 2017-10-16 | 2018-01-30 | 京东方科技集团股份有限公司 | Display drive method, display drive apparatus and display module |
| US11398190B2 (en) | 2017-10-16 | 2022-07-26 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display driving device having delayed light-emission control signals and driving method thereof |
| CN113948032A (en) * | 2021-02-03 | 2022-01-18 | 友达光电股份有限公司 | Pixel circuit and driving method thereof |
| CN113948032B (en) * | 2021-02-03 | 2023-09-29 | 友达光电股份有限公司 | Pixel circuit and driving method thereof |
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