CN203433775U - Active-matrix organic light-emitting display (AOMLED) pixel-driving device - Google Patents
Active-matrix organic light-emitting display (AOMLED) pixel-driving device Download PDFInfo
- Publication number
- CN203433775U CN203433775U CN201320456789.2U CN201320456789U CN203433775U CN 203433775 U CN203433775 U CN 203433775U CN 201320456789 U CN201320456789 U CN 201320456789U CN 203433775 U CN203433775 U CN 203433775U
- Authority
- CN
- China
- Prior art keywords
- reset
- transistor
- driving device
- voltage source
- reset transistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model provides an active-matrix organic light-emitting display (AOMLED) pixel-driving device. An AMOLED pixel-driving device in each light-emitting pixel unit comprises all parts in a 2T1C circuit, and also comprises a reset transistor and a reset voltage source. The drain electrode of the reset transistor is connected with the grid electrode of a driving transistor. The grid electrode of the reset transistor is connected with the reset voltage source. A switching transistor, the driving transistor and the reset transistor are all P-channel field-effect transistors, and the source electrode of the reset transistor is connected with a power supply; or the switching transistor, the driving transistor and the reset transistor are all N-channel field-effect transistors, and the source electrode of the reset transistor is directly grounded. According to the utility model, the driving transistor is reset at first before each frame is displayed, so as to enable the driving transistor to return in advance to a cut-off working point, thereby eliminating image persistence in a process that an AMOLED display panel displays an image, and improving the display quality of a product.
Description
Technical field
The utility model relates to technical field of flat panel display, relates in particular the pixel driving device of active matrix organic light-emitting display.
Background technology
OLED(Organic Light-Emitting Diode, Organic Light Emitting Diode or organic light emitting diode display) according to its type of drive, be divided into active matrix organic light-emitting display (AMOLED) and passive-matrix organic light emitting display (PMOLED).In flat panel display, the many merits such as AMOLED is frivolous with it, active illuminating, fast response time, wide viewing angle, rich color and high brightness, low-power consumption, high-low temperature resistant and by industry, to be known as be continue LCD(liquid crystal display) after third generation display.
AMOLED comprises a plurality of light emitting pixel unit that matrix is arranged that are, and Fig. 1 is the driving circuit of each light emitting pixel unit, comprising: switching transistor T1, driving transistors T2, memory capacitance Cs, provide sweep signal V
scanscan voltage source, data-signal V is provided
datadata voltage source and supply voltage V is provided
ddpower supply.Wherein, the grid of switching transistor T1 is connected with described scan voltage source, and its source electrode is connected with described data voltage source, and the drain electrode of switching transistor T1 is connected with one end of memory capacitance Cs, and is connected with the grid of driving transistors T2; The other end of memory capacitance Cs is connected with the source electrode of driving transistors T2, and while and the described supply voltage V that provides
ddpower supply be connected; The drain electrode of driving transistors T2 is connected with the anode of OLED, the plus earth of described OLED.
Take switching transistor T1 and driving transistors T2 as PMOS pipe be example, when scan voltage source provides low level signal, switching transistor T1 conducting, the data-signal V that data voltage source provides
databy the passage between the source-drain electrode of switching transistor T1, to memory capacitance Cs charging, meanwhile, this voltage acts on the grid of driving transistors T2, make driving transistors T2 be operated in magnifying state (state of saturation), and then driving OLED is luminous; When scan voltage source provides high level signal, switching transistor T1 is in cut-off state, data-signal V
dataalso just can not pass to the grid of driving transistors T2; Now, memory capacitance Cs two ends are due to the shutoff of switching transistor T1 do not had the to release passage of electric charge, the voltage at memory capacitance Cs two ends remains unchanged in theory, make driving transistors T2 still in magnifying state, continue to maintain the luminous of OLED, until the arrival of next frame data-signal, so circulation.
But inventor finds, when continuously to pixel-driving circuit input data signal, gray scale image before pixel-driving circuit mixed display and current gray scale image and cannot reach desirable show state, while being present image demonstration, the data-signal that previous frame image shows disturbs the data-signal of current frame image demonstration, and then causes showing the display distortion of product.
Utility model content
In view of this, the utility model provides novel AMOLED pixel driving device, to solve AMOLED of the prior art when showing image, signal interference present image signal due to front piece image, and cause the bright dark inequality of present image, the ghost of piece image before existing and cause the problem of display distortion.
For achieving the above object, the utility model provides following technical scheme:
A kind of AMOLED pixel driving device, described AMOLED is comprised of a plurality of light emitting pixel unit that are matrix arrangement, AMOLED pixel driving device in each light emitting pixel unit comprises: switching transistor, driving transistors, memory capacitance, light-emitting component, power supply, data voltage source and scan voltage source, described AMOLED pixel driving device also comprises reset transistor and reset voltage source, the drain electrode of described reset transistor is connected with the grid of described driving transistors, and the grid of described reset transistor is connected with described reset voltage source; Described switching transistor, described driving transistors and described reset transistor are P-channel field-effect transistor (PEFT) pipe, and the source electrode of described reset transistor is connected with described power supply.
Preferably, described switching transistor, described driving transistors and described reset transistor are PMOS pipe.
Preferably, at the reset period of described AMOLED pixel driving device, the reset signal that described reset voltage source provides is low level signal.
A kind of AMOLED pixel driving device, described AMOLED is comprised of a plurality of light emitting pixel unit that are matrix arrangement, AMOLED pixel driving device in each light emitting pixel unit comprises: switching transistor, driving transistors, memory capacitance, light-emitting component, power supply, data voltage source and scan voltage source, described AMOLED pixel driving device also comprises reset transistor and reset voltage source, the drain electrode of described reset transistor is connected with the grid of described driving transistors, and the grid of described reset transistor is connected with described reset voltage source; Described switching transistor, described driving transistors and described reset transistor are N channel field-effect pipe, the direct ground connection of source electrode of described reset transistor.
Preferably, described switching transistor, described driving transistors and described reset transistor are NMOS pipe.
Preferably, at the reset period of described AMOLED pixel driving device, the reset signal that described reset voltage source provides is high level signal.
Preferably, described light-emitting component is light emitting diode or Organic Light Emitting Diode.
Known via above-mentioned technical scheme, the AMOLED pixel driving device that the utility model provides, except comprising switching transistor, outside each structure in the 2T1C such as driving transistors and memory capacitance circuit, also comprise reset transistor and reset voltage source, when refreshing pixel data at every turn, the low and high level signal controlling reset transistor conducting that described reset voltage source provides, thereby the reset signal (drive voltage signal or ground signalling) that makes reset transistor source electrode input is the grid at driving transistors by the channeling between the source-drain electrode of reset transistor, the grid voltage of driving transistors is resetted, make driving transistors get back in advance cut-off working point, when thereby the data-signal driving OLED that makes each frame pixel is luminous, it is luminous that driving crystal light can only start from cut-off working point driving OLED, the brightness of image showing regardless of previous frame image, can not affect the demonstration of present image, and then the ghost of having avoided previous frame image disturbs the effect of present image demonstration, improved the display quality of product.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is AMOLED pixel driving device schematic diagram of the prior art;
Fig. 2 is the front piece image that in prior art, AMOLED light emitting pixel unit shows;
Fig. 3 is the present image with ghost that in prior art, AMOLED light emitting pixel unit shows;
Fig. 4 is the lagging characteristics curve map of PMOS pipe;
A kind of AMOLED pixel driving device schematic diagram that Fig. 5 provides for the utility model;
Fig. 6 is the driving sequential chart that the AMOLED pixel driving device shown in Fig. 5 is corresponding;
The another kind of AMOLED pixel driving device schematic diagram that Fig. 7 provides for the utility model;
Fig. 8 is the driving sequential chart that the AMOLED pixel driving device shown in Fig. 7 is corresponding.
Embodiment
Just as described in the background section, AMOLED pixel driving device of the prior art is when each demonstration image, due to the signal of front piece image disturb present image signal to cause present image to exist before the ghost of piece image, present image shows bright dark inequality, and then occurs the problem of display distortion.
Inventor's discovery, occurs that the reason of above-mentioned phenomenon is, in the pixel driving device of light emitting pixel unit, driving transistors has lagging characteristics, thereby causes when showing present image, also has the ghost of former frame image.
For instance, as shown in Figure 2, checkerboard image for the demonstration of former frame data-signal driving OLED, described chessboard is comprised of the grid of black and pure white two kinds of colors, current frame image is the same chessboard being comprised of the grid of black and pure white two kinds of colors shown in Fig. 3, difference is only: the place of being originally ater should show pure white, and original lily place should show ater image.But due to the lagging characteristics of driving transistors, the image finally showing as shown in Figure 3 brightness black and pure white between the image of a certain grey.
Take switching transistor T1 and driving transistors T2 as PMOS pipe be example, to occurring that the principle of above-mentioned phenomenon describes in detail, the transfer characteristic curve of PMOS pipe as shown in Figure 4, gate source voltage V
gSwhile changing along different directions, corresponding drain-source current I
dSchange curve do not overlap, and OLED brightness is directly proportional to drain-source current IDS, drain-source current I
dSdifference, brightness is different.When a rear frame data signals is input in pixel driving device, due to the lagging characteristics of driving transistors, although be added to the gate source voltage V of the drive transistor gate of each light emitting pixel unit
gSBidentical, but the original brighter part (as original white portion) of image, the drain-source current I of the driving transistors of respective pixel unit
dScan change to voltage V along C → B ' → A segment of curve direction
gSBcorresponding drain-source current I
dS1; The original part of dark images (as original black part), the drain-source current I of the driving transistors of respective pixel unit
dSalong A → B → C curve section direction, change to voltage V
gSBcorresponding drain-source current I
dS2.Be should show lily place in present image, owing to being subject to the interference of ater display in former frame image, what show is no longer pure white, but the stack of pure white and former frame picture black ghost, the brightness of the final present image showing is because being subject to the interference of former frame brightness of image, and the bright dark inequality that becomes, there is the ghost of front piece image in present image, thereby cause present image display distortion.
Based on this, the utility model provides a kind of AMOLED pixel driving device, described AMOLED is comprised of a plurality of light emitting pixel unit that are matrix arrangement, AMOLED pixel driving device in each light emitting pixel unit comprises: switching transistor, driving transistors, memory capacitance, light-emitting component, power supply, data voltage source and scan voltage source, described AMOLED pixel driving device also comprises reset transistor and reset voltage source, the drain electrode of described reset transistor is connected with the grid of described driving transistors, the grid of described reset transistor is connected with described reset voltage source,
Described switching transistor, described driving transistors and described reset transistor are P-channel field-effect transistor (PEFT) pipe, and the source electrode of described reset transistor is connected with described power supply;
Or described switching transistor, described driving transistors and described reset transistor are N channel field-effect pipe, the direct ground connection of source electrode of described reset transistor.
From above-mentioned technical scheme, the AMOLED pixel driving device that the utility model provides, comprise reset transistor and reset voltage source, conducting and the cut-off of the output voltage control reset transistor by reset voltage source, when refreshing pixel data at every turn, first the grid voltage of driving transistors is resetted, make driving transistors get back in advance cut-off working point, thereby the brightness regardless of front piece image, it is luminous that the gate source voltage of the driving transistors of all pixel drive unit can only start from cut-off working point driving OLED, thereby the display brightness that makes present image is not subject to the interference of former frame brightness of image, and then it is inhomogeneous to have avoided producing brightness of image in product procedure for displaying, the phenomenon that occurs ghost.
It is more than the application's core concept, 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 a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
A lot of details have been set forth in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from mode described here and implement, those skilled in the art can do similar popularization without prejudice to the utility model intension in the situation that, so the utility model is not subject to the restriction of following public specific embodiment.
Secondly, the utility model is described in detail in conjunction with schematic diagram, when the utility model embodiment is described in detail in detail; for ease of explanation; the sectional view that represents device architecture can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of the utility model protection at this.The three-dimensional space that should comprise in addition, length, width and the degree of depth in actual fabrication.
Below by several embodiment, specifically describe.
Embodiment mono-
A kind of AMOLED pixel driving device disclosing in the present embodiment, as shown in Figure 5, comprises OLED, memory capacitance Cs, driving transistors T2, switching transistor T1, reset transistor T3, also comprises data-signal V is provided
datadata voltage source, sweep signal V is provided
scanscan voltage source, the reset voltage source Reset of resetting voltage is provided and driving voltage V is provided
ddpower supply.
Wherein, the grid of switching transistor T1 connects provides sweep signal V
scanscan voltage source, the source electrode of switching transistor T1 connects provides data-signal V
datadata voltage source, the drain electrode of switching transistor T1 is connected with one end of memory capacitance Cs and the drain electrode of reset transistor T3 simultaneously, and the while is connected with the grid of driving transistors T2; The grid of reset transistor T3 is connected with reset voltage source Reset, and the source electrode of reset transistor T3 is connected with the other end of memory capacitance Cs and the source electrode of driving transistors T2 simultaneously, and connects power supply simultaneously; The drain electrode of driving transistors T2 connects the anode of OLED, the direct ground connection of negative electrode of described OLED.
It should be noted that, the T2 of driving transistors described in the present embodiment, switching transistor T1, reset transistor T3 are field effect transistor, in the present embodiment, preferred described driving transistors T2, switching transistor T1, reset transistor T3 are PMOS pipe, only when grid is low level signal, can conducting.Wherein, described OLED can also use LED(light emitting diode) substitute, in the present embodiment, this is not limited.
Fig. 6 has provided the driving sequential chart of the AMOLED pixel driving device shown in Fig. 5.Below in conjunction with accompanying drawing, driving sequential chart and driving method are described in detail.As shown in Figure 6, each picture frame period of this AMOLED pixel driving device is divided into B-C-D three phases, wherein the B stage is the reset period of AMOLED pixel driving device, and the C stage is the driving phase of current data signal input pixel arrangement, and the D stage is that light emitting pixel unit shows maintenance phase.It should be noted that, also comprise the A stage in figure, the image that the described A stage is a upper picture frame period shows maintenance phase,, before the data-signal of the new picture frame of input, maintains the demonstration of an image.
Enter B during the stage, because described reset transistor T3 is PMOS pipe, and the low level signal that the voltage of its grid provides for reset voltage source Reset, now reset transistor T3 conducting, and the drive voltage signal that power supply provides by the channeling between the source-drain electrode of reset transistor T3 on the grid of driving transistors T2, be equivalent on grid that high level signal acts on driving transistors T2, now driving transistors T2 gets back to cut-off working point (being the A point in Fig. 4), and driving transistors T2 resets in off state.
After this, enter C during the stage, due to reset voltage source Reset provide for high level signal, now reset transistor T3 turn-offs, and the sweep signal V that scan voltage source provides
scanfor low level signal, act on the grid of switching transistor T1, thereby make switching transistor T1 conducting, the data-signal V that data voltage source provides
datathrough the passage between the source-drain electrode of switch transistor T 1, memory capacitance Cs is charged; Meanwhile, this voltage acts on the grid of driving transistors T2, and because driving transistors T2 is PMOS pipe, therefore, this low level signal makes driving transistors T2 be operated in magnifying state (state of saturation), and then driving OLED is luminous.
Enter D during the stage, the sweep signal V that scan voltage source provides
scanfor high level signal, switching transistor T1 turn-offs, the data-signal V that data voltage source provides
dataalso just can not pass to the grid of driving transistors T2; But, memory capacitance Cs two ends, due to the shutoff of switching transistor T1 do not had the to release channel of electric charge, keep both end voltage constant, make driving transistors T2 still in magnifying state (state of saturation), continue to maintain the luminous of OLED, until next frame data-signal arrives.
It should be noted that, when next frame data-signal arrives, again enter into B during the stage, the voltage signal that power supply provides resets to driving transistors T2, and driving transistors T2 gets back to cut-off working point, now the drain-source current I of driving transistors T2
dSbe zero, therefore described OLED is non-luminous at reseting period, between two picture frame periods, there is the blank phase suitable with B phases-time length, in order to make the demonstration of this blank phase not affect observer's observing effect, the described B duration in stage is more short better in the situation that guaranteeing to reset, and for the luminous power consumption that fully resets and save part OLED, reduce the thermal value of AMOLED panel, the aspects such as serviceable life that extend OLED material are considered, the described B duration in stage, the longer the better again, therefore, in the stage of B described in the present embodiment lasting time be preferably light emitting pixel unit picture frame period 1/10th, thereby can guarantee the adequacy resetting, can make full use of again the sunset glow effect of OLED luminescent material and the visual persistence of human eye sensitization, make AMOLED display panel show that image is under the prerequisite of observing effect that does not affect observer, reduce the thermal value of OLED, improve the life-span of OLED.
Those of ordinary skill in the art should be able to recognize, driving sequential chart described in the utility model is artificial definition, consider that picture frame period can people be defined as different values, the reset period of described AMOLED pixel driving device (being the B stage), the driving phase (being the C stage) of current data signal input pixel arrangement, light emitting pixel unit show maintenance phase (being the D stage) also can people for being defined as different value, as long as in the picture frame period of light emitting pixel unit, before outputting data signals, the switching time that described reset voltage source provides level to control reset transistor T3 is positioned at described data voltage source and described scan voltage source was controlled light-emitting component before the luminous moment, in the foremost in each frame period, first make driving transistors get back to cut-off working point.In actual production process, the lasting time in described B stage also can be set according to different display requirements.
A kind of AMOLED pixel driving device that the present embodiment provides, comprise switching transistor, driving transistors and reset transistor, and be PMOS pipe, in conjunction with the corresponding sequential chart of this AMOLED pixel driving device, at different phase gauge tap transistor, the shutoff of driving transistors and reset transistor and conducting, thereby before each pixel luminescence unit shows new image, the grid voltage of the driving transistors in described drive unit is resetted, while making to show present image, the brightness of front piece image no longer affects the brightness of present image, and then eliminated and shown the phenomenon that has last width afterimage of image in present image process, improved the display quality that shows product, make product have more the market competitiveness.
Embodiment bis-
A kind of AMOLED pixel driving device disclosing in the present embodiment, the driving device structure of its structure and embodiment mono-is basic identical, difference is that its switching transistor T1, driving transistors T2 and reset transistor T3 are NMOS pipe, and the direct ground connection of the source electrode of described reset transistor T3.As shown in Figure 7, described pixel driving device also comprises OLED, memory capacitance Cs, data-signal V is provided
datadata voltage source, sweep signal V is provided
scanscan voltage source, the reset voltage source Reset of resetting voltage is provided and driving voltage V is provided
ddpower supply.
Fig. 8 has provided the driving sequential chart of the drive unit shown in Fig. 7, the sequential chart of sequential chart in the present embodiment and embodiment mono-is basic identical, it should be noted that, the T2 of driving transistors described in the present embodiment, switching transistor T1, reset transistor T3 are field effect transistor, and in the present embodiment, preferred described switching transistor T1, driving transistors T2 and reset transistor T3 are NMOS pipe, and NMOS pipe is only when its grid is high level signal, can conducting.Therefore the data-signal V that, in the present embodiment, data voltage source provides
data, the sweep signal V that provides of scan voltage source
scanthe polarity of the reset signal providing with reset voltage source Reset is contrary with the polarity of the corresponding voltage signal in embodiment mono-.As shown in Figure 8, each picture frame period of this AMOLED pixel driving device is also divided into B-C-D three phases, wherein the B stage is the reset period of AMOLED pixel driving device, and the C stage is the driving phase of current data signal input pixel arrangement, and the D stage is that light emitting pixel unit shows maintenance phase.It should be noted that, also comprise the A stage in figure, the image that the described A stage is a upper picture frame period shows maintenance phase,, before the new image frame data signal of input, maintains the demonstration of an image.
Enter B during the stage, because described reset transistor T3 is NMOS pipe, and the high level signal that its grid provides for reset voltage source Reset, now reset transistor T3 conducting, and the source ground of reset transistor T3, therefore, 0V voltage by the channeling between the source-drain electrode of reset transistor T3 on the grid of driving transistors T2, be the equal of the grid that low level signal acts on driving transistors, thereby driving transistors T2 is resetted, end working point.
After this, enter C during the stage, due to reset voltage source Reset provide for low level signal, now reset transistor T3 turn-offs, and the sweep signal V that scan voltage source provides
scanfor high level signal, act on the grid of switching transistor T1, thereby make switching transistor T1 conducting, the data-signal V that data voltage source provides
datathrough the passage between the source-drain electrode of switching transistor T1, memory capacitance Cs is charged; Meanwhile, this voltage acts on the grid of driving transistors T2, and driving transistors T2 is NMOS pipe, and therefore, this high level signal makes driving transistors T2 be operated in magnifying state (state of saturation), and then driving OLED is luminous.
Enter D during the stage, the sweep signal V that scan voltage source provides
scanfor low level signal, switching transistor T1 turn-offs, the data-signal V that data voltage source provides
dataalso just can not pass to the grid of driving transistors T2; But, memory capacitance Cs two ends, due to the shutoff of switching transistor T1 do not had the to release channel of electric charge, keep both end voltage constant, make driving transistors T2 still in magnifying state (state of saturation), continue to maintain the luminous of OLED, until next frame data-signal arrives.
It should be noted that, when next frame data-signal arrives, again enter into B during the stage, the driving transistors T2 that 0V voltage (low level signal) is NMOS pipe to type resets, driving transistors T2 gets back to cut-off working point, now the drain-source current I of driving transistors T2
dSbe zero, therefore described OLED is non-luminous at reseting period, between two picture frame periods, there is the blank phase suitable with B phases-time length, in order to make the demonstration of this blank phase not affect observer's observing effect, the described B duration in stage is more short better in the situation that guaranteeing to reset, and for the luminous power consumption that fully resets and save part OLED, reduce the thermal value of AMOLED panel, the aspects such as serviceable life that extend OLED material are considered, the described B duration in stage, the longer the better again, therefore, in the stage of B described in the present embodiment lasting time be preferably light emitting pixel unit picture frame period 1/10th, thereby can guarantee the adequacy resetting, can make full use of again the sunset glow effect of OLED luminescent material and the visual persistence of human eye sensitization, make AMOLED display panel show that image is under the prerequisite of observing effect that does not affect observer, reduce the thermal value of OLED, improve the life-span of OLED.In actual production process, the lasting time in described B stage also can be set according to different display requirements.
A kind of AMOLED pixel driving device that the present embodiment provides, comprise switching transistor, driving transistors and reset transistor, and be NMOS pipe, in conjunction with the corresponding sequential chart of this AMOLED pixel driving device, at different phase gauge tap transistor, the shutoff of driving transistors and reset transistor and conducting, thereby before each pixel luminescence unit shows new image, the grid voltage of the driving transistors in described drive unit is resetted, while making to show present image, the brightness of front piece image no longer affects the brightness of present image, and then eliminated and shown the phenomenon that has last width afterimage of image in present image process, improved the display quality that shows product, make product have more the market competitiveness.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an AMOLED pixel driving device, described AMOLED is comprised of a plurality of light emitting pixel unit that are matrix arrangement, AMOLED pixel driving device in each light emitting pixel unit comprises: switching transistor, driving transistors, memory capacitance, light-emitting component, power supply, data voltage source and scan voltage source, it is characterized in that, described AMOLED pixel driving device also comprises reset transistor and reset voltage source, the drain electrode of described reset transistor is connected with the grid of described driving transistors, the grid of described reset transistor is connected with described reset voltage source,
Described switching transistor, described driving transistors and described reset transistor are P-channel field-effect transistor (PEFT) pipe, and the source electrode of described reset transistor is connected with described power supply.
2. AMOLED pixel driving device according to claim 1, is characterized in that, described switching transistor, described driving transistors and described reset transistor are PMOS pipe.
3. AMOLED pixel driving device according to claim 2, is characterized in that, at the reset period of described AMOLED pixel driving device, the reset signal that described reset voltage source provides is low level signal.
4. an AMOLED pixel driving device, described AMOLED is comprised of a plurality of light emitting pixel unit that are matrix arrangement, AMOLED pixel driving device in each light emitting pixel unit comprises: switching transistor, driving transistors, memory capacitance, light-emitting component, power supply, data voltage source and scan voltage source, it is characterized in that, described AMOLED pixel driving device also comprises reset transistor and reset voltage source, the drain electrode of described reset transistor is connected with the grid of described driving transistors, the grid of described reset transistor is connected with described reset voltage source,
Described switching transistor, described driving transistors and described reset transistor are N channel field-effect pipe, the direct ground connection of source electrode of described reset transistor.
5. AMOLED pixel driving device according to claim 4, is characterized in that, described switching transistor, described driving transistors and described reset transistor are NMOS pipe.
6. AMOLED pixel driving device according to claim 5, is characterized in that, at the reset period of described AMOLED pixel driving device, the reset signal that described reset voltage source provides is high level signal.
7. according to the AMOLED pixel driving device described in claim 1 or 4, it is characterized in that, described light-emitting component is light emitting diode or Organic Light Emitting Diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320456789.2U CN203433775U (en) | 2013-07-29 | 2013-07-29 | Active-matrix organic light-emitting display (AOMLED) pixel-driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320456789.2U CN203433775U (en) | 2013-07-29 | 2013-07-29 | Active-matrix organic light-emitting display (AOMLED) pixel-driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203433775U true CN203433775U (en) | 2014-02-12 |
Family
ID=50062801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320456789.2U Expired - Lifetime CN203433775U (en) | 2013-07-29 | 2013-07-29 | Active-matrix organic light-emitting display (AOMLED) pixel-driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203433775U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135288A1 (en) * | 2014-03-11 | 2015-09-17 | 京东方科技集团股份有限公司 | Power-off control method and circuit, drive circuit and amoled display device |
| WO2015188520A1 (en) * | 2014-06-13 | 2015-12-17 | 京东方科技集团股份有限公司 | Pixel driver circuit, driving method, array substrate, and display device |
| CN107424569A (en) * | 2017-08-03 | 2017-12-01 | 京东方科技集团股份有限公司 | Pixel unit circuit, driving method, image element circuit and display device |
| CN107833559A (en) * | 2017-12-08 | 2018-03-23 | 合肥京东方光电科技有限公司 | Pixel-driving circuit, organic electroluminescence display panel and image element driving method |
| CN109817156A (en) * | 2017-11-20 | 2019-05-28 | 上海视涯信息科技有限公司 | OLED pixel circuit and image display device |
| CN111369936A (en) * | 2020-04-10 | 2020-07-03 | 深圳市华星光电半导体显示技术有限公司 | Light-emitting drive circuit, drive method thereof and display panel |
-
2013
- 2013-07-29 CN CN201320456789.2U patent/CN203433775U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135288A1 (en) * | 2014-03-11 | 2015-09-17 | 京东方科技集团股份有限公司 | Power-off control method and circuit, drive circuit and amoled display device |
| US10152918B2 (en) | 2014-03-11 | 2018-12-11 | Boe Technology Group Co., Ltd. | Shutdown controlling method, shutdown controlling circuit, driving circuit and AMOLED display device |
| CN105206221B (en) * | 2014-06-13 | 2018-06-22 | 京东方科技集团股份有限公司 | Pixel-driving circuit, driving method, array substrate and display device |
| US9747839B2 (en) | 2014-06-13 | 2017-08-29 | Boe Technology Group Co., Ltd. | Pixel driving circuit, driving method, array substrate and display apparatus |
| CN105206221A (en) * | 2014-06-13 | 2015-12-30 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method, array substrate and display device |
| WO2015188520A1 (en) * | 2014-06-13 | 2015-12-17 | 京东方科技集团股份有限公司 | Pixel driver circuit, driving method, array substrate, and display device |
| CN107424569A (en) * | 2017-08-03 | 2017-12-01 | 京东方科技集团股份有限公司 | Pixel unit circuit, driving method, image element circuit and display device |
| US11056056B2 (en) | 2017-08-03 | 2021-07-06 | Boe Technology Group Co., Ltd. | Pixel unit circuit, method of driving the same, pixel circuit and display device |
| CN109817156A (en) * | 2017-11-20 | 2019-05-28 | 上海视涯信息科技有限公司 | OLED pixel circuit and image display device |
| CN107833559A (en) * | 2017-12-08 | 2018-03-23 | 合肥京东方光电科技有限公司 | Pixel-driving circuit, organic electroluminescence display panel and image element driving method |
| CN107833559B (en) * | 2017-12-08 | 2023-11-28 | 合肥京东方光电科技有限公司 | Pixel driving circuit, organic light emitting display panel and pixel driving method |
| CN111369936A (en) * | 2020-04-10 | 2020-07-03 | 深圳市华星光电半导体显示技术有限公司 | Light-emitting drive circuit, drive method thereof and display panel |
| WO2021203521A1 (en) * | 2020-04-10 | 2021-10-14 | 深圳市华星光电半导体显示技术有限公司 | Light-emitting driving circuit and driving method thereof, and display panel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203433776U (en) | Active-matrix organic light-emitting display (AOMLED) pixel-driving device | |
| CN203433775U (en) | Active-matrix organic light-emitting display (AOMLED) pixel-driving device | |
| KR102333868B1 (en) | Organic light emitting diode display device | |
| CN104409047B (en) | Pixel driving circuit, pixel driving method and display device | |
| CN104485071B (en) | Image element circuit and its driving method and active matrix/organic light emitting display | |
| KR101973125B1 (en) | Pixel circuit and method for driving thereof, and organic light emitting display device using the same | |
| CN104036725B (en) | Image element circuit and its driving method, organic electroluminescence display panel and display device | |
| CN104424886B (en) | Organic light emitting display device | |
| CN108597450A (en) | Pixel circuit and its driving method, display panel | |
| CN103400548B (en) | Pixel-driving circuit and driving method, display device | |
| CN107452338B (en) | A kind of pixel circuit, its driving method, display panel and display device | |
| CN104200777B (en) | Image element circuit and its driving method, display floater, display device | |
| CN110010072A (en) | Pixel circuit and its driving method, display device | |
| TW201525970A (en) | Pixel circuit, pixel, AMOLED display device comprising the pixel and driving method thereof | |
| KR20150019592A (en) | Pixel, pixel driving method, and display device using the same | |
| CN105074808A (en) | Display device and method for driving display device | |
| CN104599641A (en) | OLED pixel unit and driving method thereof, as well as OLED display device | |
| CN107452336B (en) | Pixel-driving circuit and its driving method, display panel and its driving method | |
| CN109903720A (en) | Light-emitting display apparatus and its driving method | |
| CN105185321B (en) | AMOLED driving circuits, display panel and display | |
| CN104575380A (en) | Pixel circuit and active matrix organic light-emitting display | |
| CN103500556A (en) | Pixel circuit, pixel circuit driving method and thin film transistor backplane | |
| KR102627276B1 (en) | Display Device and Driving Method of the same | |
| CN103578428B (en) | A kind of driving method of image element circuit of active organic electroluminescent display | |
| US20180182296A1 (en) | Pixel drive circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |
|
| CX01 | Expiry of patent term |