Pixel drive circuit and driving method thereof, and organic light-emitting display panel
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A pixel drive circuit and pixel technology, which is applied in the field of pixel drive circuits and organic light-emitting display panels, can solve problems such as flickering, affecting the brightness of OLED light, and failure to ensure lossless conduction or complete cut-off.
Active Publication Date: 2017-07-07
BOE TECH GRP CO LTD +1
View PDF6 Cites 31 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, the switch transistor cannot be turned on or completely turned off without loss, so leakage current will occur when the switch transistor cannot be completely turned off, and a leakage current path will be formed, causing part of the current used for OLED light to flow through the initialization transistor to the initialization In the signal path, thus affecting the luminous brightness of the OLED, and causing flickering phenomenon
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0101] like Figure 3a The pixel drive circuit shown, its corresponding input timing diagram is as follows Figure 5a shown. Specifically, choose the Figure 5a There are three stages in the input timing diagram shown: an initialization stage T1, a data writing stage T2, and a light emitting stage T3. in, Figure 5a Among them, Vg(M0) represents the gate voltage of the initialization transistor M0, and the voltage V of the high potential of the leakage control signal terminal CK ck Take the high potential voltage equal to the reset signal terminal Reset as an example.
[0102] In the initialization phase T1, Reset=0, Scan=1, EM=1, CK=0.
[0103] Since Reset=0, both the first switch transistor M1 and the third switch transistor M3 are turned on. Since Scan=1, both the second switch transistor M2 and the fourth switch transistor M4 are turned off. Since EM=1, both the fifth switch transistor M5 and the sixth switch transistor M6 are turned off. The turned-on first switch...
Embodiment 2
[0112] like Figure 4a The pixel drive circuit shown, its corresponding input timing diagram is as follows Figure 5b shown. Specifically, choose the Figure 5b There are three stages in the input timing diagram shown: an initialization stage T1, a data writing stage T2, and a light emitting stage T3. in, Figure 5b Among them, Vg(M0) represents the gate voltage of the initialization transistor M0, and the voltage V of the low potential of the leakage control signal terminal CK ck Take the low potential voltage equal to the reset signal terminal Reset as an example.
[0113] In the initialization phase T1, Reset=1, Scan=0, EM=0, CK=1.
[0114] Since Reset=1, both the first switch transistor M1 and the third switch transistor M3 are turned on. Since Scan=0, both the second switch transistor M2 and the fourth switch transistor M4 are turned off. Since EM=0, both the fifth switch transistor M5 and the sixth switch transistor M6 are turned off. The turned-on first switch t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a pixel drive circuit and a driving method thereof, and an organic light-emitting display panel. The pixel drive circuit comprises a light-emitting device, a pixel compensation circuit connected with the light-emitting device, a signal input module, and a leakage suppression module. A reset signal terminal is connected with a control electrode of an initialized transistor by the signal input module. The signal input module is used for providing a signal of the reset signal terminal for the control electrode of the initialized transistor under control of the reset signal terminal; and the leakage suppression module is used for increasing a voltage difference between the control electrode of the initialized transistor and a second electrode of the initialized transistor under control of a leakage control signal terminal. On the basis of mutual cooperation of the modules, the signal inputted into an initialized signal terminal by the initialized transistor can be controlled; and the initialized transistor enters a cut-off state by increasing the voltage difference between the control electrode and the second electrode of the initialized transistor. Therefore, formation of a leakage current path of the initialized transistor can be avoided; the brightness of the light-emitting device can be improved; and the scintillation phenomenon can be improved.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a pixel driving circuit, a driving method thereof and an organic light-emitting display panel. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hot spots in the field of flat panel display research today. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, low production cost, self-illumination, and wide viewing angle. and quick response. At present, OLED displays have begun to replace traditional LCD displays in display fields such as mobile phones, tablet computers, and digital cameras. However, unlike LCDs that use a stable voltage to control brightness, OLEDs are driven by current and require a stable current to control their light emission. Due to the process and device aging, OLED displays generally use threshold voltage V th Functional pixel compensation circuit to drive OLED to emit light. [0003] At pr...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more