CN203456072U - Pixel unit and pixel circuit - Google Patents
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- CN203456072U CN203456072U CN201320615281.2U CN201320615281U CN203456072U CN 203456072 U CN203456072 U CN 203456072U CN 201320615281 U CN201320615281 U CN 201320615281U CN 203456072 U CN203456072 U CN 203456072U
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Abstract
The utility model relates to the technical field of display, particular to a pixel unit and a pixel circuit comprising the pixel unit. The pixel unit comprises a light emitting device and n drive sub-circuits, wherein n is a natural number and is larger than 1. Each of the drive sub-circuits comprises a control electrode scanning signal line, a switch transistor, and a drive transistor, wherein the control electrode of the switch transistor is connected with the control electrode scanning signal line, the first electrode of the switch transistor is connected with a data line, and the second electrode is connected with the control electrode of the drive transistor; and the first electrode of the drive transistor is connected with a power supply line and the second electrode of the drive transistor is connected with the third electrode of the light emitting device. The fourth electrode of the light emitting device is connected with a reference voltage terminal. By employing the design of the n (n>1) drive sub-circuits used for driving the light emitting device to emit light, the drive sub-circuits can be enabled to drive the light emitting device to emit light according to time sequence phases. In this way, the stress time of the drive transistor in each drive sub-circuit can be effectively shortened.
Description
Technical field
The utility model relates to display technique field, the image element circuit that relates in particular to a kind of pixel cell and comprise this pixel cell.
Background technology
Organic Light Emitting Diode (OLED, Organic Light-Emitting Diode) is applied in high-performance active matrix organic light emitting diode display more and more as a kind of current mode luminescent device.In traditional passive matrix Organic Light Emitting Diode (Passive Matrix OLED) display, along with the increase of display size, need the driving time of shorter single pixel, thereby need to increase transient current, increase power consumption.The simultaneously application of large electric current can cause on nano indium tin metal oxide line pressure drop excessive, and makes OLED operating voltage too high, and then reduces its efficiency.And active matrix organic light-emitting diode (AMOLED, Active Matrix OLED) display is by the switching transistor input OLED electric current of lining by line scan, can address these problems well.
In the back plate design of AMOLED, the problem that mainly needs to solve is the heterogeneity of the OLED device brightness that drives of each AMOLED pixel cell.
First, AMOLED adopts thin film transistor (TFT) (TFT, Thin-Film Transistor) to build pixel cell and provides corresponding drive current for luminescent device.In prior art, mostly adopt low-temperature polysilicon film transistor or oxide thin film transistor.Compare with general amorphous silicon film transistor, low-temperature polysilicon film transistor and oxide thin film transistor have higher mobility and more stable characteristic, are more suitable for being applied in AMOLED demonstration.But the limitation due to crystallization process, the low-temperature polysilicon film transistor of making on large-area glass substrate, usually on electrical parameters such as threshold voltage, mobility, there is heterogeneity, this heterogeneity can be converted into drive current difference and the luminance difference of OLED device, and by the perception of human eye institute, i.e. look uneven phenomenon.Although the homogeneity of oxide thin film transistor technique is better, but similar with amorphous silicon film transistor, under long-time pressurization and high temperature, its threshold voltage there will be drift, because display frame is different, the threshold drift amount of panel each several part thin film transistor (TFT) is different, can cause display brightness difference, due to this species diversity with show before image-related, be therefore often rendered as ghost phenomena.
Because the luminescent device of OLED is current driving apparatus, therefore, in driving the luminous pixel cell of luminescent device, the threshold property of its driving transistors is very large on drive current and the final brightness impact showing.Driving transistors is subject to voltage stress and illumination all can make its threshold value drift about, and this threshold values drift meeting is presented as brightness disproportionation in display effect.
Utility model content
The technical matters that the utility model solves is to provide a kind of pixel cell and image element circuit, for solving the problem of the pixel cell driving transistors threshold drift of prior art.
The purpose of this utility model is achieved through the following technical solutions: a kind of pixel cell, comprises a luminescent device and n drive sub-circuits; Wherein, n is natural number and n>1;
Described in each, drive sub-circuits includes and controls utmost point scan signal line, switching transistor and driving transistors; The control utmost point of described switching transistor connects controls utmost point scan signal line, and first utmost point connects described data line, and second utmost point connects the control utmost point of driving transistors; First utmost point of described driving transistors connects described power provides line, and second utmost point connects the 3rd utmost point of luminescent device;
The 4th utmost point of described luminescent device connects reference voltage end.
Further, described in each, drive sub-circuits also comprises control transistor; This is controlled the transistorized control utmost point and connects time-sequence control module, and first utmost point connects pixel cell scan signal line, and second utmost point connects the control utmost point of switching transistor described in each.
Further, described control is grid very, the described first very drain electrode, the described second source electrode very.
Further, the described the 3rd anode very, the described the 4th negative electrode very.
Further, described luminescent device is the illuminated Organic Light Emitting Diode in top.
Further, n=2.
An image element circuit, comprises the pixel cell a plurality of as above of arranging with matrix form, also comprises that data line and power provide line, wherein,
Described data line connects first utmost point of switching transistor described in each;
Described power provides line to connect first utmost point of driving transistors described in each.
Further, also comprise:
Time-sequence control module, connects described in each and controls the transistorized control utmost point, for according to sequential stage control described in each drive sub-circuits drive successively luminescent device.
Further, also comprise P bar pixel cell scan signal line; Wherein, P is the quantity of pixel cell scan signal line, and P is natural number, P>1; Each described pixel cell scan signal line is corresponding transistorized first utmost point of all described control connecting in a described pixel cell all.
The utility model compared with prior art has advantages of following:
1, the utility model adopts n(n>1) individual for driving the design of the luminous drive sub-circuits of luminescent device; Can make each drive sub-circuits drive luminescent device luminous according to the sequential stage; By this form, can effectively be solved in existing pixel cell and be adopted single driving transistors to drive because luminescent device is long-time, this driving transistors, in driving process, is damaged by long the caused physical characteristics of stress time of voltage; This physical characteristics infringement is the main cause that produces the drift of driving transistors threshold values; Adopt time-sequence control module by sequential stage control, between a plurality of drive sub-circuits, to carry out the switching of sequential stage, can effectively shorten the stress time of driving transistors in each drive sub-circuits; Thereby solved the problem that display quality that driving transistors causes because of drift reduces, guaranteed the driving effect of luminescent device; Extended the serviceable life of pixel cell.
2, the utility model adopts the design of time-sequence control module, is controlled transistorized unlatching or closes described in each, thereby realize the object that sequentially drives switching between each drive sub-circuits according to the sequential stage by sequential stage control; Guaranteed the accuracy of switching, reduced and drive the misuse rate switching.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the circuit connection diagram of pixel cell described in the utility model embodiment mono-;
Fig. 2 is the circuit connection diagram of pixel cell described in the utility model embodiment mono-;
Fig. 3 is the circuit connection diagram of image element circuit described in the utility model embodiment bis-;
Fig. 4 is the step block diagram of driving method described in the utility model embodiment bis-;
Fig. 5 is the sequential stage control schematic diagram of driving method described in the utility model embodiment bis-.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, the every other embodiment that those of ordinary skills obtain, belongs to the scope that the utility model is protected.
Embodiment mono-:
Shown in Figure 1, the pixel cell described in the utility model embodiment is mainly used in the driving of each luminescent device in active matrix organic light emitting diode display, and each luminescent device is driven by a pixel cell; Each pixel cell comprises luminescent device and n drive sub-circuits; Wherein, the quantity that n is drive sub-circuits, and n is natural number, n>1;
Described in each, drive sub-circuits includes and controls utmost point scan signal line GATE, switching transistor Ts and driving transistors DTFT; The control utmost point of described switching transistor connects controls utmost point scan signal line, and first utmost point connects described data line DATA, and second utmost point connects the control utmost point of driving transistors; First utmost point of described driving transistors connects described power provides line ELVDD, and second utmost point connects the 3rd utmost point of luminescent device OLED;
The 4th utmost point of described luminescent device connects reference voltage end.In Fig. 1, GATE(1) refer to that the sequential stage is the control utmost point scan signal line of the 1st, GATE(2) refer to that the sequential stage is the control utmost point scan signal line of the 2nd, GATE(k-1) refer to that the sequential stage is the control utmost point scan signal line of k-1, GATE(k) refer to that the sequential stage is the control utmost point scan signal line of k; Known by that analogy, GATE(n) refer to that the sequential stage is the control utmost point scan signal line of n, k=n now, k refers to the sequence number into each sequential stage in the same work period, and k is natural number, 1≤k≤n); Described drive sub-circuits is used for driving described luminescent device luminous within the corresponding duration in sequential stage.
Described in the present embodiment, control very grid, the described first very drain electrode, the described second source electrode very; The described the 3rd anode very, the described the 4th negative electrode very; Described luminescent device is the illuminated Organic Light Emitting Diode in top.Certainly, those skilled in the art it should be understood that due to transistorized source electrode, interchangeability structurally of drain electrode, also can take source electrode as first utmost point, drain electrode be second utmost point.And, depend on the connected mode of described luminescent device, also can using negative electrode as the 3rd utmost point, and using anode as the 4th utmost point.
Shown in Figure 1, as mentioned above, the present embodiment has n drive sub-circuits; Wherein, and n>1; Therefore, in the same work period of pixel cell, should there is n sequential stage accordingly; That is to say that the quantity of drive sub-circuits and the quantity in sequential stage keep equating.The sequence number that defines each sequential stage in the same work period is k, and k is natural number, 1≤k≤n; Because drive sub-circuits is identical with the quantity in sequential stage, therefore, described in each, the sequence number of drive sub-circuits is also defined as k; Below illustrate;
When the sequential stage, sequence number k was 1, the 1st corresponding described drive sub-circuits drives luminescent device work; When the sequential stage, sequence number k was 2, the 2nd corresponding described drive sub-circuits drives luminescent device work; By that analogy, when the sequential stage, sequence number k was n, drive sub-circuits drives luminescent device work described in corresponding n bar; So far, during k=n, represent that each drive sub-circuits in this cycle drives luminescent device luminous complete according to the order in sequential stage successively.In the utility model, in a corresponding corresponding sequential stage of drive sub-circuits described in each, that is to say, in the utility model, the quantity of drive sub-circuits and sequence number and the quantity in described sequential stage and sequence number match; Meanwhile, the duration in some sequential stages in the utility model, be the drive sub-circuits corresponding with the sequence number in this sequential stage and drive the luminous work duration of luminescent device; For example K sequential during the stage (wherein, 1≤k≤n), the work duration of the k corresponding with it described drive sub-circuits is tk, and therefore, tk is also represented as the duration in K sequential stage; The homogeneity of the utility model for guaranteeing that in each stage in sequential stage, drive sub-circuits drives for luminescent device, spy is set as identical duration by the duration in each sequential stage.
Shown in Figure 2, described in each, drive sub-circuits also comprises control transistor T c; This is controlled the transistorized control utmost point and connects time-sequence control module, and first utmost point connects pixel cell scan signal line, and second utmost point connects the control utmost point of switching transistor described in each.
Described in each of the utility model pixel cell, first of driving transistors is extremely all connected to power and provides line (belonging to prior art) upper, and this power provides line external working power, for luminescent device provides operating voltage.Luminescent device described in the present embodiment is Organic Light Emitting Diode (OLED device).
Reference voltage end described in the present embodiment is for connecting the 4th utmost point of described luminescent device.The reference voltage that provides of thinking luminescent device for described reference voltage end, such as for connecting zero line, ground wire zero potential to be provided or negative voltage etc. is provided.
In the present embodiment, driving transistors is N-shaped TFT driving transistors described in each; The TFT form of this N-shaped TFT driving transistors is enhancement mode (threshold voltage for just) or depletion type (threshold voltage is for negative); Described driving transistors, driving transistors, switching transistor, switching transistor, control transistor, be field effect transistor.
The utility model adopts at least two for driving the design of the luminous drive sub-circuits of luminescent device; Can make each drive sub-circuits drive luminescent device luminous according to the sequential stage; By this form, can effectively be solved in existing pixel cell and be adopted single driving transistors to drive because luminescent device is long-time, this driving transistors, in driving process, is damaged by long the caused physical characteristics of stress time of voltage; This physical characteristics infringement is the main cause that produces the drift of driving transistors threshold values; Adopt time-sequence control module by sequential stage control, between a plurality of drive sub-circuits, to carry out the switching of sequential stage, can effectively shorten the stress time of driving transistors in each drive sub-circuits; Thereby solved the problem that display quality that driving transistors causes because of drift reduces, guaranteed the driving effect of luminescent device; Extended the serviceable life of pixel cell.
In the present embodiment, the described pixel cell of hypothesis comprises n drive sub-circuits (wherein, the quantity that n is drive sub-circuits, and n>1), that is to say that pixel cell has n driving transistors; When pixel cell drives luminescent device, when a drive sub-circuits in n drives luminescent device, the stress time that the driving transistors in this drive sub-circuits bears when driving be so driving transistors stress time when single driving transistors drives in prior art 1/n doubly; Accordingly by that analogy, the stress time of each driving transistors in n driving transistors is all reduced in prior art the 1/n of stress time when single driving transistors drives; With this, well solved the threshold values drifting problem causing because driving transistors stress time is excessive in prior art; Guarantee the serviceable life of driving transistors, improved display quality.
Theoretically, the minimum number of the included drive sub-circuits of described pixel cell can be two; But along with the quantity of drive sub-circuits increases, in pixel cell, the possibility of the threshold values of each driving transistors generation drift is just lower; And, adopt more drive sub-circuits, can be therein certain or certain several driving transistorss while losing efficacy, can guarantee that luminescent device still can keep normally luminous under remaining driving transistors drove successively according to the sequential stage.But, the increase of the quantity of described drive sub-circuits is restricted condition, how many meetings of its quantity are limited to the quantity of the luminescent device that the size of the applied display panel of pixel cell and specification and display panel comprise, luminescent device means that the transistor of needs is also just more more at most; The transistor of laying on display panel more just means that on the display panel under same size, to lay transistorized density just larger, and this will affect the aperture opening ratio of display panel, and then affects the display brightness of display panel; Therefore,, when the quantity of drive sub-circuits is more, the corresponding display panel that adopts pixel cell described in the utility model to make should be the illuminated active matrix organic light emitting diode display in top.
The illuminated active matrix organic light emitting diode display in described top refers to: the active matrix organic light emitting diode display that comprises the 3rd utmost point layer, organic electro luminescent layer, the 4th utmost point layer, wherein, described organic electro luminescent layer is arranged on the 3rd utmost point layer, and described the 4th utmost point layer is arranged in organic electro luminescent layer; And described the 4th utmost point layer is positioned at the light-emitting face of active matrix organic light emitting diode display, described the 3rd utmost point layer is positioned at the light reflection surface of active matrix organic light emitting diode display, a plurality of pixel cell correspondences are arranged under the 3rd utmost point layer, and with the 3rd extremely corresponding connection of luminescent device; The illuminated active matrix organic light emitting diode display in top described in the present embodiment, its concrete structure belongs to prior art, no longer too much repeats herein.
In above-mentioned, the feature of the illuminated active matrix organic light emitting diode display in this top is that the corresponding organic electro luminescent layer of described luminescent device emits beam under the driving of pixel cell, light first reflects through the 3rd utmost point layer reflecting surface, and the light after reflection sees through the 4th utmost point layer again and penetrates; Therefore, the brightness of this active matrix organic light emitting diode display is only relevant with the aperture opening ratio of the 4th utmost point layer; The 3rd utmost point layer only need have high light reflectivity to guarantee that light reflection need to; Because pixel cell is that correspondence is arranged on described the 3rd utmost point layer below, therefore, even if the number of transistors in pixel cell is a lot, the aperture opening ratio of the 3rd utmost point layer is very little, can not exert an influence to the light reflection of the 3rd utmost point layer, and then can not affect the display brightness of active matrix organic light emitting diode display and the serviceable life of organic electro luminescent layer yet.
Embodiment bis-:
Image element circuit in the present embodiment is the improvement on embodiment mono-basis, and in embodiment mono-, disclosed technology contents is not repeated in this description, and the disclosed content of embodiment mono-also belongs to the disclosed content of the present embodiment.
Shown in Figure 3, the image element circuit described in the utility model embodiment is mainly used in control and the driving of all luminescent devices in active matrix organic light emitting diode display, wherein,
Described image element circuit, comprises a plurality of pixel cells described in embodiment mono-, also comprises that data line and power provide line, and wherein, described data line connects first utmost point of switching transistor described in each;
Described power provides line to connect first utmost point of driving transistors described in each.
Described in the present embodiment, image element circuit also comprises:
Time-sequence control module T-CON, connects described in each and controls the transistorized control utmost point, for according to sequential stage control described in each drive sub-circuits drive successively luminescent device.
When controlling transistor described in each and open successively according to the sequential stage, respectively with described in each, control each that transistor is connected described in control utmost point scan signal line and pulse scanning voltage be passed to and be attached thereto the described switching transistor connecing successively, as the cut-in voltage of described switching transistor.
Time-sequence control module described in the present embodiment is controlled transistorized unlatching or closes described in each by sequential stage control, thereby realizes the object that sequentially drives switching between each drive sub-circuits according to the sequential stage; Guaranteed the accuracy of switching, reduced and drive the misuse rate switching.
Image element circuit described in the present embodiment also comprises P bar pixel cell scan signal line Scan; Wherein, P is the quantity of pixel cell scan signal line, and P is natural number, P>1; Each described pixel cell scan signal line is corresponding transistorized first utmost point of all described control connecting in a described pixel cell all, that is to say that all control utmost point scan signal lines in each pixel cell all connect a described pixel cell scan signal line for correspondence with it; Described in each pixel cell scan signal line all with for driving the IC driving circuit IC of image element circuit work to be connected; When the luminescent device of some or several pixel cells need to be worked, that is to say that this one or several pixel cell is in sequential in the stage, the pixel cell scan signal line transmitted signal that IC driving circuit connects to this one or several pixel cell; Described time-sequence control module is open at this sequential according to sequential control correspondence needs the described control transistor of opening in the stage; Pulse signal is passed to described switching transistor by the control transistor corresponding with this sequential stage, thereby realizes the driving of a certain drive sub-circuits to luminescent device.
For Fig. 3, Scan in figure (1) is the 1st pixel cell scan signal line, is Scan(P) P and controls utmost point scan signal line, P>1; Described IC driving circuit provides and opens required pulse voltage to the control transistor corresponding with this sequential stage in pixel cell described in each in stage in each sequential, in order to control the residing drive sub-circuits of this controls transistor, drives described luminescent device luminous within the duration in sequential stage accordingly.
It should be noted that, first utmost point and second utmost point of all crystals pipe in the utility model embodiment do not distinguish, and for example, first utmost point of driving transistors also can be second utmost point of driving transistors, correspondingly, now second utmost point of driving transistors first utmost point of driving transistors.
Shown in Fig. 4, Fig. 5, the driving method that the utility model also provides the image element circuit described in a kind of as above-mentioned to realize, is described method below in conjunction with Fig. 4: in figure, and V
gATE(1)be the 1st potential waveform of controlling the output of utmost point scan signal line; V
gATE(2)be the 2nd potential waveform of controlling the output of utmost point scan signal line; V
gATE(k-1)it is the potential waveform that k-1 bar is controlled the output of utmost point scan signal line; V
gATE(k)it is the potential waveform that k bar is controlled the output of utmost point scan signal line; V
gATE(n)for when the k=n, n bar is controlled the potential waveform of utmost point scan signal line output; t
(k-1)it is the k-1 sequential stage; t
(k)it is the k sequential stage;
Described method comprises:
1, start the k-1 sequential stage, the k-1 bar drive sub-circuits in each row pixel cell starts to drive; Described time-sequence control module is controlled utmost point scan signal line described in the k-1 bar in the k-1 in each row pixel cell each row pixel cell of described control transistor turns, makes it in high level; Described in all the other, control utmost point scan signal line all in low level; Described in k-1 bar, control utmost point scan signal line and open k-1 described switching transistor in each row pixel cell; Data line is loaded on data voltage k-1 described driving transistors in each row pixel cell successively, k-1 described driving transistors in each row pixel cell is unlocked, make described power that line and described luminescent device conducting are provided, drive successively the luminescent device in each row pixel cell luminous; Until k sequential stage starts.
2, start the k sequential stage, k-1 bar drive sub-circuits in each row pixel cell stops driving, and controls utmost point scan signal line described in the k-1 bar in each row pixel cell to close k-1 described switching transistor and k-1 the described driving transistors in each row pixel cell; Meanwhile, the k bar drive sub-circuits in each row pixel cell starts to drive; Described time-sequence control module is controlled utmost point scan signal line described in the k bar in each row pixel cell of described control transistor turns of the k in each row pixel cell, makes it in high level, controls utmost point scan signal line all in low level described in all the other; Described in k bar, control utmost point scan signal line and open k described switching transistor in each row pixel cell; Data line is loaded on data voltage k described driving transistors in each row pixel cell successively, k described driving transistors in each row pixel cell is unlocked, make described power that line and described luminescent device conducting are provided, drive successively the luminescent device in each row pixel cell luminous.
3, by that analogy, until during k=n, this work period finishes, and enters next work period; Wherein, the quantity that n is drive sub-circuits, and n>1; K is the sequence number in each sequential stage in the same work period, and 1≤k≤n.
In the present embodiment, before the described drive sub-circuits driving stage, be also included in each sequential stage while starting, described time-sequence control module is opened each sequential stage according to the sequential stage successively order and is distinguished the described control transistor in the described drive sub-circuits of correspondence; Make minute in the stage, each in drive sub-circuits described in to control utmost point scan signal line described in each in different sequential and according to the sequential stage successively order, be switched on respectively, for time-sequence control module, control drive sub-circuits described in each and drive successively luminescent device luminous by sequential stage separately; And the lasting time in each sequential stage is the time of a two field picture.
Claims (9)
1. a pixel cell, is characterized in that, comprises a luminescent device and n drive sub-circuits; Wherein, n is natural number and n>1;
Described in each, drive sub-circuits includes and controls utmost point scan signal line, switching transistor and driving transistors; The control utmost point of described switching transistor connects controls utmost point scan signal line, and first utmost point connects described data line, and second utmost point connects the control utmost point of driving transistors; First utmost point of described driving transistors connects described power provides line, and second utmost point connects the 3rd utmost point of luminescent device;
The 4th utmost point of described luminescent device connects reference voltage end.
2. pixel cell as claimed in claim 1, is characterized in that, described in each, drive sub-circuits also comprises control transistor; This is controlled the transistorized control utmost point and connects time-sequence control module, and first utmost point connects pixel cell scan signal line, and second utmost point connects the control utmost point of switching transistor described in each.
3. pixel cell as claimed in claim 1 or 2, is characterized in that, described control is grid very, the described first very drain electrode, the described second source electrode very.
4. pixel cell as claimed in claim 1 or 2, is characterized in that, the described the 3rd anode very, the described the 4th negative electrode very.
5. pixel cell as claimed in claim 1 or 2, is characterized in that, described luminescent device is the illuminated Organic Light Emitting Diode in top.
6. pixel cell as claimed in claim 1 or 2, is characterized in that, n=2.
7. an image element circuit, is characterized in that, comprises a plurality of pixel cells described in any one of claim 1 to 6 of arranging with matrix form, also comprises that data line and power provide line, wherein,
Described data line connects first utmost point of switching transistor described in each;
Described power provides line to connect first utmost point of driving transistors described in each.
8. image element circuit as claimed in claim 7, is characterized in that, also comprises:
Time-sequence control module, connects described in each and controls the transistorized control utmost point, for according to sequential stage control described in each drive sub-circuits drive successively luminescent device.
9. image element circuit as claimed in claim 8, is characterized in that,
Also comprise P bar pixel cell scan signal line; Wherein, P is the quantity of pixel cell scan signal line, and P is natural number, P>1; Each described pixel cell scan signal line is corresponding transistorized first utmost point of all described control connecting in a described pixel cell all.
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| CN201320615281.2U CN203456072U (en) | 2013-09-30 | 2013-09-30 | Pixel unit and pixel circuit |
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| CN201320615281.2U CN203456072U (en) | 2013-09-30 | 2013-09-30 | Pixel unit and pixel circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489404A (en) * | 2013-09-30 | 2014-01-01 | 京东方科技集团股份有限公司 | Pixel unit, pixel circuit and driving method of pixel circuit |
| WO2018188327A1 (en) * | 2017-04-14 | 2018-10-18 | 京东方科技集团股份有限公司 | Pixel circuit and drive method therefor, display panel, and display apparatus |
-
2013
- 2013-09-30 CN CN201320615281.2U patent/CN203456072U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489404A (en) * | 2013-09-30 | 2014-01-01 | 京东方科技集团股份有限公司 | Pixel unit, pixel circuit and driving method of pixel circuit |
| WO2015043266A1 (en) * | 2013-09-30 | 2015-04-02 | 京东方科技集团股份有限公司 | Pixel unit, pixel circuit and drive method therefor |
| CN103489404B (en) * | 2013-09-30 | 2016-08-17 | 京东方科技集团股份有限公司 | Pixel cell, image element circuit and driving method thereof |
| US9990880B2 (en) | 2013-09-30 | 2018-06-05 | Boe Technology Group Co., Ltd. | Pixel unit reducing voltage stress applied to driving transistor, pixel circuit having the pixel unit and driving method thereof |
| WO2018188327A1 (en) * | 2017-04-14 | 2018-10-18 | 京东方科技集团股份有限公司 | Pixel circuit and drive method therefor, display panel, and display apparatus |
| US11170716B2 (en) | 2017-04-14 | 2021-11-09 | Boe Technology Group Co., Ltd. | Pixel circuit, driving method thereof, display panel, and display device |
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