CN103489406B - A kind of pixel drive unit and driving method, image element circuit - Google Patents
A kind of pixel drive unit and driving method, image element circuit Download PDFInfo
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- CN103489406B CN103489406B CN201310464199.9A CN201310464199A CN103489406B CN 103489406 B CN103489406 B CN 103489406B CN 201310464199 A CN201310464199 A CN 201310464199A CN 103489406 B CN103489406 B CN 103489406B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The present invention relates to display technique field, particularly relate to a kind of pixel drive unit and driving method, image element circuit.Pixel drive unit of the present invention is by before the anode that is input to each luminescent device at signal source voltage line, set up a capacitor cell, achieve the anode potential that the is input to luminescent device difference according to electroluminescent organic material and structure, and obtain different anode potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of pixel drive unit and driving method, image element circuit.
Background technology
Active matrix organic light-emitting diode (the ActiveMatrixOrganicLightEmittingDiode of estimated current type, be abbreviated as AMOLED) display device, the main signal source voltage line exported with IC signal of its panel power consumption is relevant with the electric current flowing through Organic Light Emitting Diode (OrganicLight-EmittingDiode is abbreviated as OLED).Wherein under certain brightness, the size of current flowing through Organic Light Emitting Diode is relevant to device architecture primarily of electroluminescent organic material, can be improved by electroluminescent organic material and device architecture optimization, thus reduces AMOLED display panel power consumption.In currently available technology, major part adopts these class methods to carry out panel lower power consumption.
Also have simultaneously and reduce signal source voltage line size by reducing signal source voltage line to the mode of Organic Light Emitting Diode path resistor, realize display panel lower power consumption.
In the design of present active matrix organic light emitting diode display part, cathode terminal and the anode tap of all pixels are interconnected respectively, and namely the anode tap current potential of all pixels is identical, and all pixel cathode terminal signals are identical; Just only an anode signal is exported like this and a cathode signal just can from the output terminal of IC driving circuit.In traditional structure, the anode signal directly exported by IC and cathode signal, be directly inputted on pixel electrode.By reducing signal source voltage line to the mode of Organic Light Emitting Diode path resistor, reducing signal source voltage line size, is very limited relatively.
Therefore, for above deficiency, the invention provides a kind of pixel drive unit and driving method, the image element circuit that can reduce signal source voltage line to the full extent and then realize display panel lower power consumption.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention solves the high problem of existing active matrix organic light-emitting diode display panel power consumption.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of pixel drive unit, comprise multiple pixel driver subelement and luminescent device, described each pixel driver subelement comprises building-out capacitor and switching transistor, and described building-out capacitor carries out charging for driving luminescent device under switching transistor controls.
Further, the first end of described building-out capacitor is connected with signal source voltage line, and the second end is connected with the drain electrode of described switching transistor and the anode tap of luminescent device, and the source electrode of switching transistor is connected with reference voltage line, and grid is connected with scan signal line.
Further, described switching transistor is p type field effect transistor or n type field effect transistor.
Further, described luminescent device is organic electroluminescent LED.
The embodiment of the present invention also provides a kind of driving method of above-mentioned pixel drive unit, comprising:
Reseting stage, signal source voltage line exports electronegative potential, and reference voltage line exports noble potential; Scan signal line opens described switching transistor, makes reference voltage line be loaded on the second end of building-out capacitor with reference to current potential;
Glow phase, signal source voltage line exports noble potential, and reference voltage line exports electronegative potential; Scan signal line closes described switching transistor, and operating potential is loaded on the first end of building-out capacitor by signal source voltage line; Building-out capacitor release electric charge, to the anode tap of described luminescent device, makes described luminescent device luminous.
Further, described driving method comprises multiple reseting stage and multiple glow phase, and described reseting stage and glow phase hocket.
Further, described driving method can only include a reseting stage.
Further, described switching transistor is p type field effect transistor; At reseting stage, described scan signal line exports electronegative potential, in order to open described switching transistor; In glow phase, described scan signal line exports noble potential, in order to close described switching transistor.
Further, described switching transistor is n type field effect transistor; At reseting stage, described scan signal line exports noble potential, in order to open described switching transistor; In glow phase, described scan signal line exports electronegative potential, in order to close described switching transistor.
The embodiment of the present invention also provides a kind of image element circuit, comprises the pixel drive unit described in above-mentioned any one, also comprises time-sequence control module, and described time-sequence control module connects described scan signal line, and the automatic sequential for each described scan signal line switches control.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: the present invention is before signal source voltage line is input to the anode tap of each luminescent device, be provided with a capacitor cell, achieve the anode tap current potential that the is input to luminescent device difference according to electroluminescent organic material and structure, and obtain different anode tap current potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of embodiment of the present invention pixel drive unit;
Fig. 2 is the sequential control schematic diagram of the embodiment of the present invention one pixel drive unit driving method;
Fig. 3 is the sequential control schematic diagram of the embodiment of the present invention two pixel drive unit driving method;
Fig. 4 is the sequential control schematic diagram of the embodiment of the present invention three pixel drive unit driving method;
Fig. 5 is the sequential control schematic diagram of the embodiment of the present invention four pixel drive unit driving method.
In figure, VDD: signal source voltage line; Vref: reference voltage line; T-con: time-sequence control module; SwitchR: the first scan signal line; SwitchG: the second scan signal line; SwitchB: the three scan signal line; C1: the first building-out capacitor; C2: the second building-out capacitor; C3: the three building-out capacitor; R1: the first luminescent device; R2: the second luminescent device; R3: the three luminescent device; M1: the first switching transistor; M2: second switch transistor; M3: the three switching transistor; T1: reseting stage; T2: glow phase.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
The invention provides a kind of pixel drive unit, comprise multiple pixel driver subelement and luminescent device, described each pixel driver subelement comprises building-out capacitor and switching transistor, and described building-out capacitor carries out charging for driving luminescent device under switching transistor controls.
Concrete, described pixel driver subelement comprises building-out capacitor and switching transistor, the first end of described building-out capacitor is connected with signal source voltage line, second end is connected with the drain electrode of described switching transistor and the anode tap of luminescent device, the source electrode of switching transistor is connected with reference voltage line, and grid is connected with scan signal line.
It should be noted that, pixel drive unit shown in figure comprises three pixel driver subelements, be respectively used to red sub-pixel, the driving of green sub-pixels and blue subpixels, certainly for the dot structure of other structures, pixel drive unit can also be multiple, as comprised four pixel driver subelements, be respectively used to red sub-pixel, driving of green sub-pixels, blue subpixels and yellow sub-pixel etc., the present invention does not limit.
As shown in Figure 1, described first pixel driver subelement comprises the first building-out capacitor C1 and the first switching transistor M1, the first end of described first building-out capacitor C1 (i.e. the upper end of the first building-out capacitor C1 as shown in the figure) is connected with signal source voltage line VDD, second end (i.e. the lower end of the first building-out capacitor C1 as shown in the figure) drains with described first switching transistor M1 (i.e. the right-hand member of the first switching transistor M1 as shown in the figure) and the anode tap of the first luminescent device R1 is connected, the source electrode of the first switching transistor M1 (i.e. the left end of the first switching transistor M1 as shown in the figure) is connected with reference voltage line reference voltage line Vref, the grid of the first switching transistor M1 (i.e. the lower end of the first switching transistor M1 as shown in the figure) is connected with the first scan signal line SwitchR,
Described second pixel driver subelement comprises the second building-out capacitor C2 and second switch transistor M2, the first end of described second building-out capacitor C2 (i.e. the upper end of the second building-out capacitor C2 as shown in the figure) is connected with signal source voltage line VDD, second end (i.e. the lower end of the second building-out capacitor C2 as shown in the figure) drains with described second switch transistor M2 (i.e. the right-hand member of second switch transistor M2 as shown in the figure) and the anode tap of the second luminescent device R2 is connected, the source electrode of second switch transistor M2 (i.e. the left end of second switch transistor M2 as shown in the figure) is connected with reference voltage line reference voltage line Vref, the grid of second switch transistor M2 (i.e. the lower end of second switch transistor M2 as shown in the figure) is connected with the second scan signal line SwitchG,
Described 3rd pixel driver subelement comprises the 3rd building-out capacitor C3 and the 3rd switching transistor M3, the first end of described 3rd building-out capacitor C3 (i.e. the upper end of the 3rd building-out capacitor C3 as shown in the figure) is connected with signal source voltage line VDD, second end (i.e. the lower end of the 3rd building-out capacitor C3 as shown in the figure) drains with described 3rd switching transistor M3 (i.e. the right-hand member of the 3rd switching transistor M3 as shown in the figure) and the anode tap of the 3rd luminescent device R3 is connected, the source electrode of the 3rd switching transistor M3 (i.e. the lower end of the 3rd switching transistor M3 as shown in the figure) is connected with reference voltage line reference voltage line Vref, the grid of the 3rd switching transistor M3 (i.e. the lower end of the 3rd switching transistor M3 as shown in the figure) is connected with the 3rd scan signal line SwitchB.
Wherein, described first luminescent device R1, the second luminescent device R2 and the 3rd luminescent device R3 are organic electroluminescent LED.Described first scan signal line SwitchR, the second scan signal line SwitchG and the 3rd scan signal line SwitchB are for controlling the unlatching of the first switching transistor M1, second switch transistor M2 and the 3rd switching transistor M3 with closed.
The first switching transistor M1, second switch transistor M2 in pixel drive unit of the present invention and the 3rd switching transistor M3 can be p type field effect transistor or n type field effect transistor.It should be noted that, usual described switching transistor is with organic electroluminescent LED display panel gate driver circuit and drive other transistor types of luminescent device identical, manufacture craft can be simplified like this, certainly, the type of described switching transistor also can be different, and these the present invention do not limit.
Present invention also offers a kind of driving method of pixel drive unit, embodiment one and embodiment two are for the switching transistor forming pixel drive unit the driving method that p type field effect transistor introduces the pixel drive unit of the embodiment of the present invention.
The embodiment of the present invention is before signal source voltage line is input to the anode tap of each luminescent device, set up a capacitor cell, achieve the anode tap current potential that the is input to luminescent device difference according to electroluminescent organic material and structure, and obtain different anode tap current potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
Embodiment one
As shown in Figure 2, the driving method of the pixel drive unit that the embodiment of the present invention provides, in this driving method, include multiple reseting stage and multiple glow phase, described reseting stage and glow phase hocket, and wherein reseting stage is T1, and glow phase is T2.
At reseting stage T1, signal source voltage line VDD is low-voltage signal, and the first scan signal line SwitchR, the second scan signal line SwitchG, the 3rd scan signal line SwitchB are low-pressure opening signal.Shown in figure 1, reference voltage line Vref is charged to the first building-out capacitor C1 by the first switching transistor M1, is charged, charged by the 3rd switching transistor M3 to the 3rd building-out capacitor C3 by second switch transistor M2 to the second building-out capacitor C2.
Be in particular, this sequential all resetted to the first building-out capacitor C1, the second building-out capacitor C2 and the 3rd building-out capacitor C3 before every hardwood image.At reseting stage, signal source voltage line VDD is low-voltage signal, first scan signal line SwitchR, the second scan signal line SwitchG, the 3rd scan signal line SwitchB are low-pressure opening signal simultaneously, reference voltage line Vref is high potential signal (Vgh), makes second terminal potential of the first building-out capacitor C1, the second building-out capacitor C2 and the 3rd building-out capacitor C3 be filled with Vgh current potential, because electroluminescent organic material and device architecture are to the first luminescent device R1, the luminescence efficiency of the second luminescent device R2 and the 3rd luminescent device R3 is different, the first required luminescent device R1, the voltage difference at the second luminescent device R2 and the 3rd luminescent device R3 two ends is also different, so just, adjustment first luminescent device R1 can be passed through, second luminescent device R2 and the first scan signal line SwitchR corresponding to the 3rd luminescent device R3, the current potential size of the second scan signal line SwitchG and the 3rd scan signal line SwitchB, make control first luminescent device R1, the first switching transistor M1 of the second luminescent device R2 and the 3rd luminescent device R3, second switch transistor M2 and the 3rd switching transistor M3 is when writing reference voltage Vgh, realize different charge rates, realize at the first building-out capacitor C1, the current potential that second end of the second building-out capacitor C2 and the 3rd building-out capacitor C3 is different.At the first building-out capacitor C1, the first end of the second building-out capacitor C2 and the 3rd building-out capacitor C3, now the low-potential signal of signal source voltage line VDD is Vgl, now write the capacitance charge total amount of the first luminescent device R1 for (Vgh_R-Vgl) × C1, write the capacitance charge total amount of the second luminescent device R2 for (Vgh_G-Vgl) × C2, write the capacitance charge total amount of the 3rd luminescent device R3 for (Vgh_B-Vgl) × C3, wherein Vgh_R is the high potential signal of the first luminescent device R1, Vgh_G is the high potential signal of the second luminescent device R2, Vgh_B is the high potential signal of the 3rd luminescent device R3.
After reseting stage T1 terminates, glow phase T2 is identical with the normal display stage, signal source voltage line VDD is high-voltage signal, time-sequence control module T-con controls the first scan signal line SwitchR, second scan signal line SwitchG and the 3rd scan signal line SwitchB closes the first switching transistor M1 respectively, second switch transistor M2 and the 3rd switching transistor M3, first building-out capacitor C1 electric discharge driving first luminescent device R1 is luminous, second building-out capacitor C2 electric discharge driving second luminescent device R2 is luminous, 3rd building-out capacitor C3 electric discharge driving the 3rd luminescent device R3 is luminous.
Particularly, as shown in Figure 2, at glow phase T2, signal source voltage line VDD becomes noble potential (Vgh), now the first scan signal line SwitchR, second scan signal line SwitchG and the 3rd scan signal line SwitchB is in the noble potential stage, make the first switching transistor M1, second switch transistor M2 and the 3rd switching transistor M3 closes, now, operating voltage noble potential Vgh is loaded into the first building-out capacitor C1 by signal source voltage line VDD, the first end of the second building-out capacitor C2 and the 3rd building-out capacitor C3, according to capacitance charge invariance principle, now the current potential of the first building-out capacitor C1 second end that the first luminescent device R1 is corresponding is Vgh+Vgh_R-Vgl, the current potential of the second building-out capacitor C2 second end that the second luminescent device R2 is corresponding is Vgh+Vgh_G-Vgl, the current potential of the 3rd building-out capacitor C3 second end that the 3rd luminescent device R3 is corresponding is Vgh+Vgh_B-Vgl, realize thus being input to the first luminescent device R1, the anode tap current potential of the second luminescent device R2 and the 3rd luminescent device R3 is according to the first luminescent device R1, the difference of the materials and structures of the second luminescent device R2 and the 3rd luminescent device R3, and obtain different anode tap current potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
When next hardwood image shows, repeat above-mentioned reseting stage T1 and glow phase T2 equally.
Embodiment two
As shown in Figure 3, the technology contents not repeated description that the driving method of the pixel drive unit in the present embodiment is identical with embodiment one, disclosed in embodiment one, content also belongs to content disclosed in the present embodiment two, the present embodiment two is with the difference of embodiment one: reset the reseting stage T1 only occurred in before the first two field picture, namely only electric capacity reset is carried out when start the first two field picture, make display frame more steady between every hardwood image like this, there will not be the displays such as Flicker bad.
Following examples three and embodiment four are for the switching transistor forming pixel drive unit the driving method that n type field effect transistor introduces embodiment of the present invention pixel drive unit.
The embodiment of the present invention is before signal source voltage line is input to the anode tap of each luminescent device, set up a capacitor cell, achieve the anode tap current potential that the is input to luminescent device difference according to electroluminescent organic material and structure, and obtain different anode tap current potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
Embodiment three
As shown in Figure 4, the technology contents not repeated description that pixel drive unit driving method in the present embodiment is identical with embodiment one, disclosed in embodiment one, content also belongs to content disclosed in the present embodiment, the difference of the present embodiment and embodiment one is: at reseting stage T1, first scan signal line SwitchR, second scan signal line SwitchG and the 3rd scan signal line SwitchB is noble potential, make the first switching transistor M1 of N-type, second switch transistor M2 and the 3rd switching transistor M3 opens, reference voltage line Vref is charged to the first building-out capacitor C1 by the first switching transistor M1, by second switch transistor M2, the second building-out capacitor C2 is charged, by the 3rd switching transistor M3, the 3rd building-out capacitor C3 is charged.
After reseting stage T1 terminates, glow phase T2 is identical with the normal display stage, first scan signal line SwitchR, second scan signal line SwitchG and the 3rd scan signal line SwitchB is electronegative potential, make the first switching transistor M1, second switch transistor M2 and the 3rd switching transistor M3 closes, according to capacitance charge invariance principle, now the current potential of the first building-out capacitor C1 second end that the first luminescent device R1 is corresponding is Vgh+Vgh_R-Vgl, the current potential of the second building-out capacitor C2 second end that the second luminescent device R2 is corresponding is Vgh+Vgh_G-Vgl, the current potential of the 3rd building-out capacitor C3 second end that the 3rd luminescent device R3 is corresponding is Vgh+Vgh_B-Vgl, realize thus being input to the first luminescent device R1, the anode tap current potential of the second luminescent device R2 and the 3rd luminescent device R3 is according to the first luminescent device R1, the difference of the materials and structures of the second luminescent device R2 and the 3rd luminescent device R3, and obtain different anode tap current potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
When next hardwood image shows, repeat above-mentioned reseting stage T1 and glow phase T2 equally.
Embodiment four
As shown in Figure 5, the technology contents not repeated description that pixel drive unit driving method in the present embodiment four is identical with embodiment three, disclosed in embodiment three, content also belongs to content disclosed in the present embodiment four, the present embodiment and embodiment three are distinguished and are: reset the reseting stage T1 only occurred in before the first two field picture, namely only electric capacity reset is carried out when start the first two field picture, make display frame more steady between every hardwood image like this, there will not be the displays such as Flicker bad.
Embodiment five
The present embodiment five provides a kind of image element circuit, comprise multiple pixel drive unit, described pixel drive unit can be any one in above-described embodiment, and identical technology contents not repeated description, content disclosed in above-described embodiment also belongs to content disclosed in the present embodiment five.
The image element circuit of the present embodiment five also comprises time-sequence control module T-con, this time-sequence control module T-con connects the first scan signal line SwitchR, the second scan signal line SwitchG and the 3rd scan signal line SwitchB, and the automatic sequential for the first scan signal line SwitchR, the second scan signal line SwitchG and the 3rd scan signal line SwitchB switches control.
The embodiment of the present invention also provides a kind of Organic Light Emitting Diode backboard, and use pixel drive unit, driving method and image element circuit described in above-described embodiment, luminescent device is wherein organic electroluminescent LED.
In sum, the embodiment of the present invention is by before the anode tap that is input to each luminescent device at signal source voltage line, be provided with a capacitor cell, achieve the anode tap current potential that the is input to luminescent device difference according to electroluminescent organic material and structure, and obtain different anode tap current potentials, reduce unnecessary power consumption penalty, simultaneously under identical luminance, because signal source current potential is relatively low, panels en bloc power consumption is significantly reduced.
The above is only several preferred implementation of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (9)
1. a pixel drive unit, it is characterized in that: comprise multiple pixel driver subelement and luminescent device, described pixel driver subelement comprises building-out capacitor and switching transistor, described building-out capacitor is used for discharge and recharge under switching transistor controls and, to drive described luminescent device, realizes the different charge rate of described building-out capacitor by the current potential size adjusting described switching transistor gate terminal;
The first end of described building-out capacitor is connected with signal source voltage line, and the second end is connected with the drain electrode of described switching transistor and the anode tap of luminescent device, and the source electrode of switching transistor is connected with reference voltage line, and grid is connected with scan signal line.
2. pixel drive unit according to claim 1, is characterized in that: described switching transistor is p type field effect transistor or n type field effect transistor.
3. pixel drive unit according to claim 1, is characterized in that: described luminescent device is organic electroluminescent LED.
4. a driving method for the pixel drive unit according to any one of claim 1-3, is characterized in that: described method comprises:
Reseting stage, signal source voltage line exports electronegative potential, and reference voltage line exports noble potential; Scan signal line opens described switching transistor, makes reference voltage line be loaded on the second end of building-out capacitor with reference to current potential;
Glow phase, signal source voltage line exports noble potential, and reference voltage line exports electronegative potential; Scan signal line closes described switching transistor, and operating potential is loaded on the first end of building-out capacitor by signal source voltage line; Building-out capacitor release electric charge, to the anode tap of described luminescent device, makes described luminescent device luminous.
5. the driving method of pixel drive unit according to claim 4, is characterized in that: comprise multiple reseting stage and multiple glow phase, described reseting stage and glow phase hocket.
6. the driving method of pixel drive unit according to claim 4, is characterized in that: comprise a reseting stage.
7. the driving method of pixel drive unit according to claim 4, is characterized in that: described switching transistor is p type field effect transistor; At reseting stage, described scan signal line exports electronegative potential, in order to open described switching transistor; In glow phase, described scan signal line exports noble potential, in order to close described switching transistor.
8. the driving method of pixel drive unit according to claim 4, is characterized in that: described switching transistor is n type field effect transistor; At reseting stage, described scan signal line exports noble potential, in order to open described switching transistor; In glow phase, described scan signal line exports electronegative potential, in order to close described switching transistor.
9. an image element circuit, it is characterized in that: comprise multiple pixel drive unit according to any one of claim 1-3, also comprise time-sequence control module, described time-sequence control module connects described scan signal line, and the automatic sequential for each described scan signal line switches control.
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| CN201310464199.9A CN103489406B (en) | 2013-10-08 | 2013-10-08 | A kind of pixel drive unit and driving method, image element circuit |
| PCT/CN2014/082407 WO2015051659A1 (en) | 2013-10-08 | 2014-07-17 | Pixel drive unit and drive method therefor, and pixel circuit |
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| CN112863438A (en) * | 2021-01-19 | 2021-05-28 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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Also Published As
| Publication number | Publication date |
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| WO2015051659A1 (en) | 2015-04-16 |
| CN103489406A (en) | 2014-01-01 |
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