Pixel driving circuit, driving method thereof and display device

Abstract

The invention provides a pixel driving circuit. The pixel driving circuit is characterized in that each input module is connected with a data line, a corresponding scanning line and a corresponding first node, and the data line and the first node are connected under the control of the scanning line; a control end of a driving module is connected with a corresponding first node, a first end and a second end are connected with a corresponding second node and a first end of a corresponding light emitting module, and the second node and the first end of the light emitting module are conducted under the control of the first node; a first reset module is connected with a first power line, a first control line and all second nodes, so that the first power line and the second nodes are conducted independently under the control of the first control line; a control module is connected with all first nodes, all third nodes and a third control line, so that the third nodes and the corresponding first nodes are conducted independently under the control of the third control line; a second reset module is connected with a third power line, a second control line and all the third nodes, so that the third power line and the third nodes are conducted under the control of the second control line; a first end and a second end of a memory module are connected with the corresponding second node and the corresponding third node respectively, so that charge and discharge are performed under the control of the second node and the third node, and voltage difference of the second node and the third node is kept when the third node is in suspension joint.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a pixel driving circuit, a driving method of the pixel driving circuit and a display device. Background technique [0002] Organic Light Emitting Display (OLED) is one of the hot spots in the field of flat panel display research. Compared with liquid crystal display, OLED has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. , digital cameras and other display fields OLED has begun to replace the traditional LCD display. Pixel drive circuit design is the core technology content of OLED display, which has important research significance. [0003] Unlike TFT-LCD, which uses stable voltage to control brightness, OLED is current-driven and requires stable current to control light emission. figure 1 For existing pixel driver circuits, see figure 1 , the pixel driving circuit includes a light-em...

AI Technical Summary

Problems solved by technology

However, in practical applications, due to reasons such as process and device aging, the threshold voltages of the driving tubes of each pixel driving circuit are not equal, so that the current flowing through each pixel OLED will change relative to the theoretical value. As a result, the display brightness is uneven, which affects the display effect of the entire image

[0004] In order to solve the above problems, the prior art adopts a 6T1C pixel drive circuit with a compensation circuit, but it also has the following technical problems: since a pixel drive circuit can only drive one pixel, and a data line needs to be set, if To drive multiple pixels, multiple pixel drive circuits and multiple data lines need to be set up, and multiple data drive ICs need to be set up at the same time. high cost

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