US 12,183,292 B2 · Backlight driving method and display panel

Abstract

A backlight driving method and a display panel are provided. The backlight driving method provided by the present application uses pulse width modulation technology to modulate a low-level pulse width of a scan signal. By increasing a low-level pulse width to increase the pulse period, a number of high-level pulses is reduced, thereby reducing a high-level pulse time. Therefore, a time for a TFT to receive a high-level voltage is also reduced, thereby improving a stability of the TFT and also improving a problem of a threshold voltage drift of the TFT.

Claims20

Dependent claims

A backlight driving method, comprising steps of:

providing a pulse width modulation signal;
modulating a low-level pulse width of a scan signal to be modulated according to the pulse width modulation signal to increase a pulse period of the scan signal to be modulated, such that a number of high-level pulses of the modulated scan signal is less than a number of high-level pulses of the scan signal to be modulated;
and
outputting the modulated scan signal to a backlight driving circuit.

1 more element

A display panel, comprising a backlight module, wherein the backlight module is provided with a backlight driving circuit, and the backlight driving circuit is driven by a backlight driving method, wherein the backlight driving method comprises steps of:

providing a pulse width modulation signal;
modulating a low-level pulse width of a scan signal to be modulated according to the pulse width modulation signal to increase a pulse period of the scan signal to be modulated, such that a number of high-level pulses of the modulated scan signal is less than a number of high-level pulses of the scan signal to be modulated;
and
outputting the modulated scan signal to a backlight driving circuit.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/289,291Filed 25 Apr 2021

Priority

CN 2021110389512.112 Apr 2021

Published

US 2024/0127761 A118 Apr 2024

Granted

31 Dec 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G09G 3/3406
By control of light from an independent source: control of illumination source
G09G 3/32
Using electroluminescent panels: semiconductive, e.g. using light-emitting diodes [LED]
G09G 2300/0842
Several active elements per pixel in active matrix panels: forming a memory circuit, e.g. a dynamic memory with one capacitor
G09G 2310/08
Command of the display device: details of timing specific for flat panels, other than clock recovery

Backlight driving method and display panel

Life of this patent

Backlight driving method and display panel

Life of this patent

Abstract

Claims20