Pixel driving circuit, pixel driving method and display device
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 voltage value technology, applied in circuits, electrical components, electrical solid devices, etc., can solve problems such as uneven display brightness and affecting the display effect of the display
Inactive Publication Date: 2017-11-24
BOE TECH GRP CO LTD
View PDF6 Cites 15 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
[0004] Due to the process and device aging, the threshold voltage V of the driving transistor D th Drift will occur, and because the source of the driving transistor D is connected to the anode of the OLED, the source voltage Vs of the driving transistor D will change wit
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
[0052] figure 2 A structural block diagram of a pixel driving circuit provided in Embodiment 1 of the present invention, such as figure 2 As shown, the embodiment of the present invention provides a pixel driving circuit for driving light-emitting elements, including: a preset unit, a first energy storage unit, a second energy storage unit, a compensation unit and a driving unit.
[0053] In this embodiment, the preset unit is respectively connected to the scanning signal terminal Gate, the data signal terminal Data, the first node a, the reset signal terminal RST, the input signal terminal INT and the second node b, and is used to connect the scanning signal terminal Under the control of the Gate, the signal of the data signal terminal Data is provided to the first node a, and is also used to provide the signal of the input signal terminal INT to the second node b under the control of the reset signal terminal RST; the first energy storage unit is connected with the first e...
Embodiment 2
[0086] Based on the above inventive concept, Image 6 A flow chart of the pixel driving method provided in Embodiment 2 of the present invention, such as Image 6 As shown, Embodiment 2 of the present invention provides a pixel driving method, which is realized by the pixel driving circuit provided in Embodiment 1, and specifically includes the following steps:
[0087] Step 100, in the preset stage, the preset unit provides the signal of the data signal terminal to the first node under the control of the scan signal terminal, and provides the signal of the input signal terminal to the second node under the control of the reset signal terminal.
[0088] In this stage, the input signal of the light-emitting control terminal EM, the input signal of the scanning signal terminal Gate and the input signal of the reset signal terminal RST are all at high level, and the voltage value of the signal at the data signal terminal is V ref , that is, the voltage value V of the first node ...
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
An embodiment of the invention discloses a pixel driving circuit, a pixel driving method and a display device. The pixel driving circuit comprises a presetting unit, a first energy storage unit, a second energy storage unit, a compensation unit and a driving unit, wherein the pre-setting unit is used for providing a signal of a data signal end to a first node under the control of a scanning signal end, and is used for providing a signal of an input signal end to a second node under the control of a resetting signal end; the first energy storage unit is used for storing a voltage value between the first node and the second node; the second energy storage unit is used for storing a voltage value between the second node and a second power source end; the compensation unit is used for compensating for a voltage value of the second node under the control of a light-emitting control end; and the driving unit is used for delivering a driving current used for driving a light-emitting element to a third node under the control of the first node. According to the pixel driving circuit, the pixel driving method and the display device, the driving current obtained by means of the pixel driving circuit is irrelevant to a threshold voltage of a driving transistor and an anode voltage of the light-emitting element, the uniform display brightness of the display is achieved, and the display effect of the whole display is improved.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a pixel driving circuit, a pixel driving method and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hotspots in the field of display research today. Compared with Liquid Crystal Display (LCD), OLED has low energy consumption, low production cost, self-illumination, and wide viewing angle. and quick response. [0003] Among them, the pixel driving circuit is the core technology of the OLED display. In the OLED display, a stable current is required to control the OLED to emit light. figure 1 is the equivalent circuit diagram of a conventional pixel drive circuit, such as figure 1 As shown, the traditional pixel driving circuit is composed of 2T1C, that is, a driving transistor D, a switching transistor T and a capacitor C. When the scanning line Scan selects (that is, scans) a certain row, the scanning line Scan is low Flat sign...
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