CN-122024669-A - Display module and display device

CN122024669ACN 122024669 ACN122024669 ACN 122024669ACN-122024669-A

Abstract

The embodiment of the disclosure provides a display module and a display device, and relates to the technical field of display, so as to prolong the discharge time of the display device. The display module comprises a grid driving circuit, a delay discharging circuit and a switch circuit. The grid driving circuit comprises an output sub-circuit and a noise reduction sub-circuit, wherein the output sub-circuit is electrically connected with the pull-up node, the clock signal end and the first output signal end. The noise reduction sub-circuit is electrically connected with the pull-down node, the first voltage signal end and the first output signal end. The delay discharging circuit is electrically connected with the first node. The delay discharge circuit is configured to receive and store a shutdown reset signal and transmit the shutdown reset signal to the first node. The switching circuit is electrically connected to the first node and the gate driving circuit. The switching circuit is configured to control the potential of the pull-up node and/or the pull-down node in response to a shutdown reset signal. The display module is used for a display device.

Inventors

ZHANG XIUQIN
SHEN RONGZHEN
LI ZHONGXUE
HOU WENJIE
DENG JIE
Liu rongcheng
ZHOU LIUGANG
LI BING
ZHOU JING
DING KANG
JIN XIGEN

Assignees

成都京东方显示科技有限公司
京东方科技集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (13)

1. A display module, comprising: the grid driving circuit comprises an output sub-circuit and a noise reduction sub-circuit, wherein the output sub-circuit is electrically connected with a pull-up node, a clock signal end and a first output signal end, the output sub-circuit is configured to transmit the clock signal of the clock signal end to the first output signal end under the control of the voltage signal of the pull-up node, and the noise reduction sub-circuit is electrically connected with a pull-down node, a first voltage signal end and the first output signal end; the power-off reset circuit is configured to receive and store a power-off reset signal and transmit the power-off reset signal to the first node; And the switching circuit is configured to control the potential of the pull-up node and/or the pull-down node in response to the shutdown reset signal.
2. The display module of claim 1, comprising a display panel and a circuit board, wherein the display panel is electrically connected with the circuit board, the display panel comprises an array substrate, the switch circuit is arranged on the array substrate, or the switch circuit is arranged on the circuit board.
3. The display module of claim 2, wherein the gate driving circuit further comprises: The display module comprises a pull-up node, a pull-down node, a first control sub-circuit, a second control sub-circuit, a third control sub-circuit, a first voltage signal terminal, a second voltage signal terminal, a third voltage signal terminal and at least one power signal terminal, wherein the first control sub-circuit is electrically connected with the pull-up node, the pull-down node, the second voltage signal terminal, the third voltage signal terminal and the at least one power signal terminal; the second voltage signal end and the third voltage signal end are respectively and electrically connected with the first node.
4. A display module according to claim 3, wherein the gate driving circuit further comprises: The first input sub-circuit is electrically connected with the second voltage signal end, the first input signal end and the pull-up node; the first input subcircuit is configured to transmit a second voltage signal of the second voltage signal terminal to the pull-up node under control of a first input signal of the first input signal terminal; the display module comprises a pull-up node, a first reset sub-circuit, a first voltage signal terminal, a second voltage signal terminal and a second voltage signal terminal, wherein the first reset sub-circuit is electrically connected with the pull-up node, the initial signal terminal and the third voltage signal terminal, and is configured to transmit the third voltage signal of the third voltage signal terminal to the pull-up node under the control of the initial signal terminal in the working stage of the display module.
5. The display module of claim 4, wherein the switching circuit comprises at least one first transistor having a control electrode electrically connected to the first voltage signal terminal, a first electrode electrically connected to the first node, a second electrode electrically connected to the at least one power signal terminal and/or the start signal terminal, and a thin film transistor.
6. The display module of claim 4, wherein the switching circuit comprises a second transistor having a control electrode electrically connected to the first voltage signal terminal, a first electrode electrically connected to the first node, a second electrode electrically connected to the at least one power signal terminal and/or the start signal terminal, and a field effect transistor.
7. The display module of claim 6, wherein the switching circuit further comprises a reverse voltage follower sub-circuit having an input electrically connected to the first voltage signal terminal, an output electrically connected to the gate of the second transistor, the reverse voltage follower sub-circuit configured to invert the level of the received signal; the array substrate comprises a pixel circuit, wherein the pixel circuit is electrically connected with the first output signal end, one of transistors in the pixel circuit and the second transistor is a P-type transistor, and the other is an N-type transistor.
8. The display module of claim 1, wherein the first voltage signal terminal and the clock signal terminal are electrically connected to the first node, respectively.
9. The display module of claim 1, wherein the time-lapse discharging circuit comprises: the isolation sub-circuit is configured to transmit a shutdown reset signal of the second node to the first node and prevent a voltage signal of the first node from being transmitted to the second node; And the storage sub-circuit is electrically connected with the first node and the reference voltage signal terminal and is configured to store the voltage signal of the first node.
10. The display module of claim 9, wherein the isolation subcircuit comprises: And the input end of the diode is electrically connected with the second node, and the output end of the diode is electrically connected with the first node.
11. The display module of claim 9, wherein the memory sub-circuit comprises: and the first polar plate of the capacitor is electrically connected with the first node, and the second polar plate of the capacitor is electrically connected with the reference voltage signal end.
12. The display module of claim 2, wherein the gate driving circuit is disposed on the array substrate, and the time-delay discharging circuit is disposed on the circuit board.
13. A display device, comprising the display module of any one of claims 1-12.

Description

Display module and display device Technical Field The disclosure relates to the technical field of display, in particular to a display module and a display device. Background With the rapid development of display technology, display devices have been gradually spread throughout the life of people. The Liquid crystal display device (LCD for short) has the advantages of small size and low power consumption, and is widely used in smart products such as mobile phones, tablet computers, televisions, and the like. Among them, the Oxide transistor (Oxide) has a low leakage current, so that the display device using the Oxide has the advantages of low power consumption and high-speed switching. However, in the shutdown phase, the discharge of the display device is insufficient, resulting in residual charges in the panel, and further, a degradation of the display image quality of the display device. Disclosure of Invention An objective of the embodiments of the present disclosure is to provide a display module and a display device, so as to prolong a discharge time of the display device. In order to achieve the above object, the embodiments of the present disclosure provide the following technical solutions: In one aspect, a display module is provided. The display module comprises a grid driving circuit, a delay discharging circuit and a switching circuit. The grid driving circuit comprises an output sub-circuit and a noise reduction sub-circuit, and the output sub-circuit is electrically connected with the pull-up node, the clock signal end and the first output signal end. The output sub-circuit is configured to transmit the clock signal of the clock signal terminal to the first output signal terminal under control of the voltage signal of the pull-up node. The noise reduction sub-circuit is electrically connected with the pull-down node, the first voltage signal end and the first output signal end. The noise reduction sub-circuit is configured to transmit a first voltage signal of the first voltage signal terminal to the first output signal terminal under control of a voltage signal of the pull-down node. The delay discharging circuit is electrically connected with the first node. The delay discharge circuit is configured to receive and store a shutdown reset signal and transmit the shutdown reset signal to the first node. The switching circuit is electrically connected to the first node and the gate driving circuit. The switching circuit is configured to control a potential of the pull-up node and/or the pull-down node in response to the shutdown reset signal. In this way, in the shutdown stage of the display module, the switch circuit responds to the shutdown reset signal of the shutdown reset control signal to control the potential of the pull-up node and/or the pull-down node, thereby controlling the conduction of the third transistor and the fourth transistor. Further, the first output signal terminal is controlled to output a scanning signal, so that the sub-pixel connected with the first output signal terminal discharges. And the delay discharging circuit realizes the prolongation of the pulse width of the shutdown reset signal by storing the shutdown reset signal, thereby prolonging the discharging time of the sub-pixel. Further, the charge remaining problem of the sub-pixels in the shutdown stage can be improved, thereby improving the image quality of the display device. In some embodiments, the display module comprises a display panel and a circuit board, wherein the display panel is electrically connected with the circuit board, the display panel comprises an array substrate, the switch circuit is arranged on the array substrate, or the switch circuit is arranged on the circuit board. In some embodiments, the gate driving circuit further includes a first control sub-circuit electrically connected to the pull-up node, the pull-down node, a second voltage signal terminal, a third voltage signal terminal, and at least one power signal terminal, the first control sub-circuit configured to transmit the third voltage signal of the third voltage signal terminal to the pull-down node under control of the voltage signal of the pull-up node, and to transmit the second voltage signal of the second voltage signal terminal to the pull-down node or transmit the third voltage signal of the third voltage signal terminal to the pull-down node under control of the first power signal of the at least one power signal terminal during an operation phase of the display module. The second voltage signal end and the third voltage signal end are respectively and electrically connected with the first node. In some embodiments, the gate drive circuit further includes a first input sub-circuit and a first reset sub-circuit. The first input sub-circuit is electrically connected with the second voltage signal end, the first input signal end and the pull-up node, and is configured to transmit a second voltage signal of the second volta