CN103000132B - Pixel driving circuit and display panel - Google Patents
Pixel driving circuit and display panel Download PDFInfo
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- CN103000132B CN103000132B CN201210540059.0A CN201210540059A CN103000132B CN 103000132 B CN103000132 B CN 103000132B CN 201210540059 A CN201210540059 A CN 201210540059A CN 103000132 B CN103000132 B CN 103000132B
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Abstract
The invention provides a pixel driving circuit and a display panel. The pixel driving circuit comprises a driving signal generation circuit, a lighting circuit and a switching circuit, the driving signal generation circuit is used for generating and outputting a driving signal when receiving control signals, the lighting circuit comprises at least two lighting elements corresponding to pixels, and the switching circuit is arranged between the driving signal generation circuit and the lighting circuit and used for outputting the driving signal to at least one of the two lighting elements under control of switching signals to enable lighting elements receiving the driving signal to light under driving of the driving signal. The pixel driving circuit drives the lighting elements in each lighting area in a time-sharing mode to achieve lighting and displaying of each lighting area, and service life of the display panel can be improved.
Description
Technical field
The present invention relates to pixel driver technical field, particularly relate to a kind of pixel-driving circuit and there is the display panel of this pixel-driving circuit.
Background technology
Current AMOLED (Active Matrix/Organic Light Emitting Diode, active matrix organic light-emitting diode (AMOLED) panel) display panel dot structure in, each dot structure is a corresponding light-emitting zone only, this light-emitting zone is when every frame drive singal scanning, signal all will write this light-emitting zone, make this light-emitting zone at the equal luminescence display of every frame drive singal, OLED (the OrganicLight-Emitting Diode of light-emitting zone can be caused like this, Organic Light Emitting Diode) structural life-time can reduce greatly, thus reduce the serviceable life of AMOLED display panel.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of pixel-driving circuit and display panel, improve the life-span of display panel.
According to an aspect of the present invention, provide a kind of pixel-driving circuit, comprising: a drive signal generation circuit, for when receiving control signal, generating and exporting a drive singal; One illuminating circuit, comprising: at least two light-emitting components corresponding with pixel; Be arranged at the on-off circuit between described drive signal generation circuit and illuminating circuit, for under the control of switching signal, at least one at least two light-emitting components described in being outputted to by described drive singal, makes the light-emitting component receiving described drive singal can be luminous under the driving of described drive singal.
Alternatively, described at least two light-emitting components comprise: the first light-emitting component and the second light-emitting component, and described on-off circuit comprises: the first on-off element and second switch element, and described switching signal comprises: the first switching signal and second switch signal; When receiving the described control signal of the first frame, described second switch element disconnects, described first switching elements conductive under the control of described first switching signal, described second light-emitting component is in closed condition, and described first light-emitting component receiving described drive singal is in luminance; When receiving the described control signal of second frame adjacent with described first frame, described first on-off element disconnects, described second switch element conductive under the control of described second switch signal, described first light-emitting component is in closed condition, and described second light-emitting component receiving described drive singal is in luminance.
According to another aspect of the present invention, provide a kind of display panel, comprise pixel-driving circuit as above.
As shown from the above technical solution, embodiments of the invention have following beneficial effect: the light-emitting zone of in conventional pixel district is divided into two or above light-emitting zone, the light-emitting component in above each light-emitting zone is driven by pixel-driving circuit timesharing, realize each light-emitting zone luminescence display, not only can improve the life-span of display panel, and when needs high brightness, all light-emitting zones can also be set to be in luminance, to improve the brightness of display panel.
Accompanying drawing explanation
Fig. 1 represents the schematic diagram in embodiments of the invention, pixel region being divided into 2 light-emitting zones;
Fig. 2 represents in embodiments of the invention the schematic diagram of the display panel of the pixel region matrix form distribution with multiple light-emitting zone;
Fig. 3 represents the block diagram of pixel-driving circuit in embodiments of the invention;
Fig. 4 represents the structural representation of embodiments of the invention pixel-driving circuit; And
Fig. 5 represents the sequential chart of the first switching signal G1_a and second switch signal G1_b in embodiments of the invention.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment disclosed by the invention in accompanying drawing, but should be appreciated that and can realize the present invention in a variety of manners, and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the present invention can be understood, and complete for scope of the present invention can be conveyed to those skilled in the art.
Current AMOLED display panel major part adopts top emission type, and according to R/G/B EL material and structure difference, the light-emitting area of the actual use of AMOLED display panel only accounts for about 30% ~ 40% of pixel region size.The space shared by pixel region can be made full use of in an embodiment of the present invention, the light-emitting area of pixel region is divided into the light-emitting zone of more than 2 or 2, by corresponding pixel-driving circuit respective outer side edges, realize the different light-emitting zones in the same pixel of Time-sharing control, to realize pixel display.Make each light-emitting zone not be can be luminous when each frame drive singal like this, the serviceable life of display panel can be improved thus.Simultaneously when needing higher brightness, each light-emitting zone of dot structure all can be set to luminance, to improve display brightness.
See Fig. 1, for pixel region being divided in embodiments of the invention the schematic diagram of 2 light-emitting zones, wherein the first light-emitting zone meets the first switching signal G1_a, this first switching signal G1_a is for controlling the first switching elements conductive in the first light-emitting zone, second light-emitting zone meets second switch signal G1_b, and this second switch signal G1_b is for controlling second switch element conductive.Fig. 2 is the schematic diagram of the display panel of the pixel region matrix form distribution in embodiments of the invention with multiple light-emitting zone, and the rectangle in Fig. 2 represents light-emitting zone.
In order to realize the different light-emitting zone time-sharing function in same pixel region, be divided into for a pixel region structure that 2 light-emitting zones introduce pixel-driving circuit below.It is appreciated of course that the structure that a pixel region is divided into the pixel-driving circuit of the light-emitting zone of more than 2 is similar, no longer applies at this and state.
See Fig. 3, be the block diagram of pixel-driving circuit in embodiments of the invention, this pixel-driving circuit 30 comprises: a drive signal generation circuit 31, for when receiving Data control signal, generating and exporting a drive singal; One illuminating circuit 32, comprise: at least two light-emitting components corresponding with pixel, and the on-off circuit 33 be arranged between drive signal generation circuit 31 and illuminating circuit 32, for under the control of switching signal, drive singal is outputted at least one at least two light-emitting components, the light-emitting component making to receive drive singal can be luminous under the driving of described drive singal.
The light-emitting component in light-emitting zone is driven by pixel-driving circuit timesharing, realize each light-emitting zone luminescence display, not only can improve the life-span of display panel, and when needs high brightness, all light-emitting zones can also be set to be in luminance, to improve the brightness of display panel.
In one embodiment of the invention, at least two light-emitting components comprise: the first light-emitting component 322 and the second light-emitting component 324, on-off circuit 33 comprises: the first on-off element 332 and second switch element 334, and switching signal comprises: the first switching signal and second switch signal;
When receiving the Data control signal of the first frame, second switch element 334 disconnects, under the control of the first switching signal, and the first on-off element 332 conducting, the first light-emitting component 322 receiving drive singal is in luminance, and the second light-emitting component 324 is in closed condition;
When receiving the Data control signal of second frame adjacent with the first frame, first on-off element 332 disconnects, under the control of second switch signal, second switch element 334 conducting, the second light-emitting component 324 receiving drive singal is in luminance, and the first light-emitting component 322 is in closed condition.
See Fig. 4, for the structural representation of embodiments of the invention pixel-driving circuit, this pixel-driving circuit comprises: drive signal generation circuit, on-off circuit and illuminating circuit, wherein drive signal generation circuit comprises: the first film transistor M1, the second thin film transistor (TFT) M2 and charging capacitor C1, on-off circuit comprises: the 3rd thin film transistor (TFT) M3 and the 4th thin film transistor (TFT) M4, illuminating circuit comprises: the first light emitting diode D1 and the second light emitting diode D2, switching signal comprises: the first switching signal G1_a and second switch signal G1_b, wherein
The drain electrode of the first film transistor M1 connects Data control signal, the grid of the first film transistor M1 meets scanning-line signal Gate, the source electrode of the first film transistor M1 is connected with one end of charging capacitor C1 and the grid of the second thin film transistor (TFT) M2 respectively, another termination operating voltage VDD of charging capacitor C1; The source electrode of the second thin film transistor (TFT) M2 meets operating voltage VDD, and the drain electrode of the second thin film transistor (TFT) M2 is connected with the source electrode of the 3rd thin film transistor (TFT) M3 and the source electrode of the 4th thin film transistor (TFT) M4 respectively; The grid of the 3rd thin film transistor (TFT) M3 meets the first switching signal G1_a for controlling the second light emitting diode D2 luminescence, and the drain electrode of the 3rd thin film transistor (TFT) M3 connects one end of the second light emitting diode D2, another termination ground voltage VSS of the second light emitting diode D2; The grid of the 4th thin film transistor (TFT) M4 meets the second switch signal G1_b for controlling the first light emitting diode D1 luminescence, and the drain electrode of the 4th thin film transistor (TFT) M4 connects one end of the first light emitting diode D1, another termination ground voltage VSS of the first light emitting diode D1.Drive the first light emitting diode D1 and the second light emitting diode D2 by pixel-driving circuit timesharing, realize the first light emitting diode D1 and the second light emitting diode respectively or simultaneously luminescence display, effectively improve the life-span of display panel.
See Fig. 5, for the sequential chart of the first switching signal G1_a in embodiments of the invention and second switch signal G1_b, when the Data control signal of the first frame is in high level, scanning-line signal Gate and the first switching signal G1_a is in high level state, now control luminous second switch signal G1_b and be in low level state, after scanning-line signal Gate is in high level, Data control signal is transferred to the grid of the second thin film transistor (TFT) M2 by the first film transistor M1, and carry out electric charge maintenance in glow phase by charging capacitor C1, after control signal Data is transferred to the grid of the second thin film transistor (TFT) M2, the second thin film transistor (TFT) M2 is made to work in saturation region.Opening (conducting) is in data write and glow phase the 3rd thin film transistor (TFT) M3,4th thin film transistor (TFT) M4 is in closed condition (disconnection), in the write of control signal Data data and the glow phase of the first frame, second light emitting diode D2 is in luminance, and the first light emitting diode D1 is in closed condition.
When the control signal Data of second frame adjacent with the first frame is in high level, first switching signal G1_a is in low level state, second switch signal G1_b becomes high level state by low level state, in the second frame data write and glow phase, second light emitting diode D2 is in closed condition, and the first light emitting diode D1 is in luminance.The like, thus realize the different light-emitting zones in every control frame signal selection pixel region.When needs improve brightness, the first switching signal G1_a and second switch signal G1_b is in high level state simultaneously, makes the first light emitting diode D1 and the second light emitting diode D2 simultaneously luminous, thus strengthen the brightness of pixel region.
In one embodiment of the invention, the pixel region of pixel-driving circuit comprises: the first light-emitting zone and the second light-emitting zone, and wherein the second light emitting diode D2 is positioned at the first light-emitting zone, and the first light emitting diode D1 is positioned at the second light-emitting zone.
In one embodiment of the invention, the first light emitting diode D1 and the second light emitting diode D2 is Organic Light Emitting Diode.
The present invention also provides a kind of display panel, comprises pixel-driving circuit, and this pixel-driving circuit structure is identical with the structure of upper described pixel-driving circuit, no longer applies state at this.
In one embodiment of the invention, display panel is active matrix organic light-emitting diode (AMOLED) panel.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a pixel-driving circuit, is characterized in that, comprising:
One drive signal generation circuit, for when receiving control signal (Data), generating and exporting a drive singal;
One illuminating circuit, comprising: at least two light-emitting components corresponding with pixel;
Be arranged at the on-off circuit between described drive signal generation circuit and illuminating circuit, for under the control of switching signal, at least one at least two light-emitting components described in described drive singal is outputted to, the light-emitting component making to receive described drive singal can be luminous under the driving of described drive singal, different light-emitting components in the same pixel of described on-off circuit Time-sharing control, make each light-emitting component not be can be luminous when each frame drive singal, the sense of current flowing through each light-emitting component be identical.
2. pixel-driving circuit according to claim 1, it is characterized in that, described at least two light-emitting components comprise: the first light-emitting component and the second light-emitting component, described on-off circuit comprises: the first on-off element and second switch element, and described switching signal comprises: the first switching signal and second switch signal;
When receiving described control signal (Data) of the first frame, described second switch element disconnects, described first switching elements conductive under the control of described first switching signal, described second light-emitting component is in closed condition, and described first light-emitting component receiving described drive singal is in luminance;
When receiving described control signal (Data) of second frame adjacent with described first frame, described first on-off element disconnects, described second switch element conductive under the control of described second switch signal, described first light-emitting component is in closed condition, and described second light-emitting component receiving described drive singal is in luminance.
3. pixel-driving circuit according to claim 1, is characterized in that, described drive signal generation circuit comprises: the first film transistor (M1), the second thin film transistor (TFT) (M2) and charging capacitor (C1), wherein:
The drain electrode of described the first film transistor (M1) connects control signal (Data), the grid of described the first film transistor (M1) connects scanning-line signal (Gate), the source electrode of described the first film transistor (M1) is connected with one end of described charging capacitor (C1) and the grid of described second thin film transistor (TFT) (M2) respectively, another termination operating voltage (VDD) of described charging capacitor (C1);
The source electrode of described second thin film transistor (TFT) (M2) connects described operating voltage (VDD), and described second thin film transistor (TFT) (M2) is for exporting described drive singal.
4. pixel-driving circuit according to claim 3, it is characterized in that, described switching signal comprises: the first switching signal (G1_a) and second switch signal (G1_b), and described on-off circuit comprises: the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Illuminating circuit comprises: the first light emitting diode (D1) and the second light emitting diode (D2), wherein:
The source electrode of described 3rd thin film transistor (TFT) (M3) connects the drain electrode of described second thin film transistor (TFT) (M2), the grid of described 3rd thin film transistor (TFT) (M3) connects for controlling luminous the first switching signal (G1_a) of described second light emitting diode (D2), the drain electrode of described 3rd thin film transistor (TFT) (M3) connects one end of described second light emitting diode (D2), another termination ground voltage (VSS) of described second light emitting diode (D2);
The source electrode of described 3rd thin film transistor (TFT) (M4) connects the drain electrode of described second thin film transistor (TFT) (M2), the grid of described 4th thin film transistor (TFT) (M4) connects for controlling the luminous second switch signal (G1_b) of described first light emitting diode (D1), the drain electrode of described 4th thin film transistor (TFT) (M4) connects one end of described first light emitting diode (D1), ground voltage (VSS) described in another termination of described first light emitting diode (D1), described first light emitting diode (D1) and described second light emitting diode (D2) difference or simultaneously luminous is driven by described drive singal.
5. pixel-driving circuit according to claim 4, it is characterized in that, when the control signal (Data) of the first frame is in high level, described 4th thin film transistor (TFT) (M4) disconnects, under the control of described first switching signal (G1_a), described 3rd thin film transistor (TFT) (M3) conducting, in the data write phase of the control signal (Data) of the first frame, described second light emitting diode (D2) is in luminance, and described first light emitting diode (D1) is in closed condition;
When the control signal (Data) of the second frame is in high level, described 3rd thin film transistor (TFT) (M3) disconnects, described 4th thin film transistor (TFT) (M4) conducting under the control of described second switch signal (G1_b), in the data write phase of the control signal (Data) of the second frame, described second light emitting diode (D2) is in closed condition, and described first light emitting diode (D1) is in luminance.
6. pixel-driving circuit according to claim 5, it is characterized in that, after described scanning-line signal (Gate) is in high level, by described control signal (Data), the grid of described second thin film transistor (TFT) (M2) is transferred to by described the first film transistor (M1), and carry out electric charge maintenance in glow phase by described charging capacitor (C1), after described control signal (Data) is transferred to the grid of described second thin film transistor (TFT) (M2), described second thin film transistor (TFT) (M2) is made to work in saturation region, and output drive signal.
7. pixel-driving circuit according to claim 4, it is characterized in that, the pixel region of described pixel-driving circuit comprises: the first light-emitting zone and the second light-emitting zone, wherein said second light emitting diode (D2) is positioned at described first light-emitting zone, and described first light emitting diode (D1) is positioned at described second light-emitting zone.
8., according to the arbitrary described pixel-driving circuit of claim 4 ~ 7, it is characterized in that, described first light emitting diode (D1) and described second light emitting diode (D2) are Organic Light Emitting Diode.
9. a display panel, is characterized in that, comprises the arbitrary described pixel-driving circuit of as above claim 1 ~ 8.
10. display panel according to claim 9, is characterized in that, described display panel is active matrix organic light-emitting diode (AMOLED) panel.
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| CN201210540059.0A CN103000132B (en) | 2012-12-13 | 2012-12-13 | Pixel driving circuit and display panel |
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| CN103000132B true CN103000132B (en) | 2015-05-06 |
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| CN110264956A (en) * | 2019-06-21 | 2019-09-20 | 京东方科技集团股份有限公司 | Pixel circuit and its control method, display device |
| CN110890066B (en) * | 2019-11-26 | 2021-08-03 | 深圳市华星光电半导体显示技术有限公司 | Sub-pixel circuit, pixel circuit and display device |
| CN111312158B (en) * | 2020-03-04 | 2021-11-30 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN112017589A (en) * | 2020-09-08 | 2020-12-01 | Tcl华星光电技术有限公司 | Multi-gray-scale pixel driving circuit and display panel |
| US11328654B2 (en) | 2020-09-08 | 2022-05-10 | Tcl China Star Optoelectronics Technology Co., Ltd. | Multi-grayscale pixel driving circuit and display panel |
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| WO2023058571A1 (en) * | 2021-10-06 | 2023-04-13 | 株式会社ジャパンディスプレイ | Display device |
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