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Pixel driving circuit, control method thereof and display panel

A technology of pixel driving circuit and control electrode, applied in static indicators, instruments, etc., can solve the problems of anode leakage, affecting the display effect, and high anode voltage

Pending Publication Date: 2020-05-26
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing OLED display panel works in a low-frequency state, when the display panel is bright, the anode voltage is high, and leakage is prone to occur, and the leakage will increase with the extension of the low-frequency time, thereby seriously affecting the display effect
At present, there is an urgent need for a new pixel drive circuit to solve the problem of anode leakage at low frequencies

Method used

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  • Pixel driving circuit, control method thereof and display panel
  • Pixel driving circuit, control method thereof and display panel
  • Pixel driving circuit, control method thereof and display panel

Examples

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Effect test

Embodiment 1

[0038] An embodiment of the present invention provides a pixel driving circuit for driving a light-emitting diode to emit light. The pixel driving circuit includes:

[0039] Double-gate type first transistor and second transistor; wherein, the first pole of the double-gate type first transistor is electrically connected to the initial signal line, the second pole is electrically connected to the first node, and the two gates are electrically connected to the reset signal line; the second The first pole of the transistor is electrically connected to the initial signal line, the second pole is electrically connected to the anode of the light-emitting diode, and the gate is electrically connected to the gate driving signal line.

[0040] A double-gate type third transistor, a fourth transistor, and a storage capacitor; wherein, the two control poles of the double-gate type third transistor are electrically connected to the gate drive signal line, the first pole is electrically con...

Embodiment 2

[0045] On the basis of Embodiment 1, the embodiment of the present invention has been improved, and provides a pixel driving circuit for driving light-emitting diodes to emit light. Refer to figure 1 As shown, the pixel driving circuit includes:

[0046] The driving module 1 is electrically connected to the first node n1, the second node n2 and the third node n3, and is configured to conduct the path between the second node n2 and the third node n3 under the control of the voltage of the first node n1 , and make the path generate a current for making the LED 6 emit light.

[0047] The first lighting control module 2 and the second lighting control module 3, the first lighting control module 2 is electrically connected to the lighting control signal line EM, the second node n2 and the anode of the light emitting diode 6, and the second lighting control module 3 is electrically connected to the lighting control signal line EM, the voltage signal line VDD and the third node n3, ...

Embodiment 3

[0076] An embodiment of the present invention provides a display panel, including the pixel driving circuit of the first embodiment.

[0077] The above-mentioned display panel may be a flexible display panel (also known as a flexible screen), or a rigid display panel (ie, a display panel that cannot be bent), which is not limited here.

[0078] The above-mentioned display panel may be an OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) display panel, a Micro LED display panel or a Mini LED display panel, and any TV, digital camera, mobile phone, tablet computer, etc. including these display panels. A product or part with a display function.

[0079] The above-mentioned display panel has the characteristics of small anode leakage, good display effect and high product quality.

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PUM

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Abstract

The invention provides a pixel driving circuit, a control method thereof and a display panel, and relates to the technical field of display. The pixel driving circuit can greatly reduce the electric leakage amount of an anode, thereby reducing the impact on a display effect from the electric leakage of the anode. The pixel driving circuit comprises a driving module, a first light emitting controlmodule , a second light emitting control module, a driving control module which is electrically connected with a gate drive signal line, a data signal line and a third node, and a reset module which comprises a double-gate type first transistor and a second transistor. The first electrode of the double-gate type first transistor is electrically connected with an initial signal line, and the secondelectrode is electrically connected with a first node. The first electrode of the second transistor is electrically connected with an intermediate node of the double-gate type first transistor, and the second electrode is electrically connected with the anode. The two control electrodes of the double-gate type first transistor and the control electrode of the second transistor are electrically connected with a reset signal line. The invention is suitable for manufacturing the pixel driving circuit.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit, a control method thereof, and a display panel. Background technique [0002] With continuous improvement of technology, performance requirements for low-frequency OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode, Organic Light-Emitting Diode) display panels are also getting higher and higher. [0003] When the existing OLED display panel works in a low-frequency state, when the display panel is bright, the anode voltage is high, and leakage is prone to occur, and the leakage will increase with the extension of the low-frequency time, thereby seriously affecting the display effect. At present, there is an urgent need for a new pixel driving circuit to solve the problem of anode leakage at low frequencies. Contents of the invention [0004] Embodiments of the present invention provide a pixel driving circuit and its control metho...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G3/3233G09G2300/0819G09G2300/0861G09G2300/0842G09G2310/0251G09G2300/0814G09G2310/0262G09G2300/0426G09G2310/061G09G3/3291
Inventor 刘利宾李梅
Owner BOE TECH GRP CO LTD