CN-122024628-A - LED display panel, driving method thereof and LED display device

CN122024628ACN 122024628 ACN122024628 ACN 122024628ACN-122024628-A

Abstract

The invention discloses an LED display panel, a driving method thereof and an LED display device. The LED display panel comprises a plurality of first switch modules, a plurality of second switch modules, a plurality of light emitting elements, a plurality of scanning lines and a plurality of signal lines, wherein the control ends of the first switch modules are connected with the scanning lines, the first switch modules are connected between the signal lines and the control ends of the second switch modules, the second switch modules are connected between a first power supply and the first ends of the light emitting elements, the first switch modules are used for transmitting switch signals on the signal lines to the control ends of the second switch modules in response to scanning signals on the scanning lines, and the second switch modules are used for being conducted in response to effective levels of the switch signals and transmitting first power supply voltages provided by the first power supply to the light emitting elements when the switch signals are conducted. The technical scheme of the invention improves the service performance of the LED display panel.

Inventors

LI YANG
SHI MAO
WU YAN
ZHOU SHILI
WAN BAOHONG

Assignees

成都辰显光电有限公司

Dates

Publication Date: 20260512
Application Date: 20241111

Claims (10)

1. An LED display panel is characterized by comprising a plurality of first switch modules, a plurality of second switch modules, a plurality of light-emitting elements, a plurality of scanning lines and a plurality of signal lines; the control end of the first switch module is connected with the scanning line, and the first switch module is connected between the signal line and the control end of the second switch module; The second switch module is connected between a first power supply and a first end of the light-emitting element, the first switch module is used for responding to a scanning signal on the scanning line and transmitting a switch signal on the signal line to a control end of the second switch module, and the second switch module is used for responding to the effective level conduction of the switch signal and transmitting a first power supply voltage provided by the first power supply to the light-emitting element when the second switch module is conducted.
2. The LED display panel of claim 1, wherein the scan lines extend in a first direction and are aligned in a second direction, the first direction intersecting the second direction; the signal lines extend along the second direction and are arranged along the first direction; One scanning line is correspondingly connected with a plurality of first switch modules, and one signal line is correspondingly connected with a plurality of first switch modules; Preferably, the switching signal includes an active level and an inactive level, and the second switching module is configured to be turned off in response to the inactive level of the switching signal.
3. The LED display panel of claim 1, wherein the scanning signals on different scanning lines have the same period and different phases; among two adjacent scanning lines in the second direction, a scanning signal on one scanning line is delayed by a preset time period from a scanning signal on the other scanning line; preferably, the preset duration is a duration of a single effective level in the scanning signal, and the scanning signal contains the single effective level in each subframe.
4. The LED display panel of claim 1, wherein the switching signals on the same signal line are different at different gray scales; preferably, one frame of display screen of the LED display panel includes a plurality of subframes; the number of the subframes is the same as the gray scale number of the LED display panel, and the duration of the effective level of the switch signal is equal in different subframes in the same frame of display picture; in the target display picture, the number of subframes of which the switching signal corresponding to the light-emitting element is an effective level and the corresponding scanning signal is an effective level is equal to the target gray scale value corresponding to the light-emitting element; Or the number of subframes is smaller than the number of gray scales of the LED display panel; the second switch module is used for being switched on or off based on the switch signal in the writing stage; And under the same frame of display picture, the duration of the holding stage in different subframes is different.
5. The LED display panel according to claim 1, further comprising a gate control chip and a display driving chip, wherein the gate control chip is connected with the scanning line; Preferably, the LED display panel further comprises a substrate; The first switch module, the second switch module and the light-emitting element are positioned on the first side of the substrate; The grid control chip and the display driving chip are positioned on the second side of the substrate, and the first side is opposite to the second side; Preferably, the first switch module includes a first transistor, a control electrode of the first transistor is connected to the scan line, and the first transistor is connected between the signal line and a control end of the second switch module; the second switch module comprises a second transistor, a control electrode of the second transistor is connected with the first transistor, the second transistor is connected between a first power supply and a first end of the light-emitting element, and a second electrode of the light-emitting element is connected with a second power supply; preferably, the aspect ratio of the first transistor is equal to the aspect ratio of the second transistor.
6. The LED display panel of claim 5, further comprising a plurality of first side traces and a plurality of second side traces; The first side wiring extends from the first side of the substrate to the second side of the substrate, and is connected between the grid control chip and the scanning line; The second side wiring extends from the first side of the substrate to the second side of the substrate, and is connected between the display driving chip and the signal line; preferably, the LED display panel further comprises a first flexible circuit board and a second flexible circuit board; the first side wiring is connected to the grid control chip through the first flexible circuit board, and the second side wiring is connected to the display driving chip through the second flexible circuit board.
7. The LED display panel of claim 6, wherein the LED display panel comprises a display area and a non-display area; The scanning line, the signal line, the first switch module, the second switch module and the light-emitting element are positioned in the display area; the first side wiring and the second side wiring are positioned in the non-display area; Preferably, the non-display area comprises a first frame area, a second frame area, a third frame area and a fourth frame area, wherein the first frame area is opposite to the third frame area, and the first frame area is adjacent to the second frame area; The first side wire is positioned in the second frame area and/or the fourth frame area; the second side wire is located in the first frame area and/or the third frame area.
8. A driving method of an LED display panel, which is applied to the LED display panel of any one of claims 1 to 7, comprising: The grid control chip transmits a scanning signal to the first switch module through a scanning line; The display driving chip determines a target gray scale value of each light emitting element according to a target display picture, determines a switching signal of each light emitting element according to the target gray scale value, and transmits the switching signal to the second switching module through a signal line, so that the second switching module transmits a first power supply voltage provided by a first power supply to a first end of each light emitting element when responding to the switching signal to be conducted.
9. The method of claim 8, wherein a frame of the LED display panel comprises a plurality of subframes; The number of the subframes is the same as the gray scale number of the LED display panel; the display driving chip determines the switching signals of the light emitting elements according to the target gray scale value, and comprises the following steps: Determining the number of subframes of which the switching signal corresponding to the light-emitting element is an effective level and the corresponding scanning signal is an effective level according to the target gray scale value so as to determine the switching signal corresponding to the light-emitting element; Or the number of subframes is smaller than the number of gray scales of the LED display panel; the display driving chip determines the switching signal of the light emitting element according to the target gray scale value, and comprises the following steps: And determining the sum of the duration of the holding stage of the switching signal corresponding to the light-emitting element after the active level in all subframes according to the target gray scale value so as to determine the switching signal corresponding to the light-emitting element.
10. An LED display device comprising the LED display panel of any one of claims 1-7.

Description

LED display panel, driving method thereof and LED display device Technical Field The invention relates to the technical field of display, in particular to an LED display panel, a driving method thereof and an LED display device. Background With the development of display technology, LED display panels made of light-emitting diodes (LEDs) are becoming more and more widely used. The LED display panel may include a conventional LED display panel, and may also include a Micro-LED display panel and a Mini-LED display panel. However, the conventional LED display panel has a problem in that the use performance needs to be improved. Disclosure of Invention The invention provides an LED display panel, a driving method thereof and an LED display device, and aims to solve the problem that the service performance of the LED display panel needs to be improved. According to an aspect of the present invention, there is provided an LED display panel including a plurality of first switch modules, a plurality of second switch modules, a plurality of light emitting elements, a plurality of scan lines, and a plurality of signal lines; the control end of the first switch module is connected with the scanning line, and the first switch module is connected between the signal line and the control end of the second switch module; The second switch module is connected between a first power supply and a first end of the light-emitting element, the first switch module is used for responding to a scanning signal on the scanning line and transmitting a switch signal on the signal line to a control end of the second switch module, and the second switch module is used for responding to the effective level conduction of the switch signal and transmitting a first power supply voltage provided by the first power supply to the light-emitting element when the second switch module is conducted. Optionally, the scanning lines extend along a first direction and are arranged along a second direction, wherein the first direction is intersected with the second direction; the signal lines extend along the second direction and are arranged along the first direction; One scanning line is correspondingly connected with a plurality of first switch modules, and one signal line is correspondingly connected with a plurality of first switch modules; Preferably, the switching signal includes an active level and an inactive level, and the second switching module is configured to be turned off in response to the inactive level of the switching signal. Optionally, the period of the scanning signals on different scanning lines is the same, and the phases are different; among two adjacent scanning lines in the second direction, a scanning signal on one scanning line is delayed by a preset time period from a scanning signal on the other scanning line; preferably, the preset duration is a duration of a single effective level in the scanning signal, and the scanning signal contains the single effective level in each subframe. Optionally, under different gray scales, the switch signals on the same signal line are different; preferably, one frame of display screen of the LED display panel includes a plurality of subframes; the number of the subframes is the same as the gray scale number of the LED display panel, and the duration of the effective level of the switch signal is equal in different subframes in the same frame of display picture; in the target display picture, the number of subframes of which the switching signal corresponding to the light-emitting element is an effective level and the corresponding scanning signal is an effective level is equal to the target gray scale value corresponding to the light-emitting element; Or the number of subframes is smaller than the number of gray scales of the LED display panel; the second switch module is used for being switched on or off based on the switch signal in the writing stage; And under the same frame of display picture, the duration of the holding stage in different subframes is different. Optionally, the LED display panel further comprises a grid control chip and a display driving chip, wherein the grid control chip is connected with the scanning line; Preferably, the LED display panel further comprises a substrate; The first switch module, the second switch module and the light-emitting element are positioned on the first side of the substrate; The grid control chip and the display driving chip are positioned on the second side of the substrate, and the first side is opposite to the second side; Preferably, the first switch module includes a first transistor, a control electrode of the first transistor is connected to the scan line, and the first transistor is connected between the signal line and a control end of the second switch module; the second switch module comprises a second transistor, a control electrode of the second transistor is connected with the first transistor, the second transistor is connect