CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Taiwan Application Serial Number 109122464, filed Jul. 2, 2020, which is herein incorporated by reference in its entirety.

BACKGROUND

Technical Field

The present disclosure relates to a driving method and a display device, especially for compensating the driving signal according to the degradation degree of the light-emitting element.

Description of Related Art

With the rapid development of electronic technology, display devices are widely used in daily life, such as smart phones or computers. The display device is used to display a corresponding image by separately controlling the brightness of each pixel on the display panel in different frames. However, since the electronic components in the display device will gradually degrade with the driving time, it is necessary to compensate the driving signal to ensure the display quality.

SUMMARY

One aspect of the present disclosure is a driving method, comprising the following steps: driving a first dummy pixel circuit according to a first test signal, and driving a display pixel circuit according to a driving signal, wherein the first test signal is maintained at a value corresponding to a first gray level; detecting a detection voltage change value cross a light-emitting element in the display pixel circuit is driven for a driving time, and detecting a first test voltage change value cross a light-emitting element in the first dummy pixel circuit is driven for the driving time; and adjusting the driving signal according to the detection voltage change value, the first test voltage change value and a second test voltage change value, wherein the second test voltage change value is obtained by detecting a second dummy pixel circuit or from a memory unit.

Another aspect of the present disclosure is a display device, comprising a display panel and a processor. The display panel comprises a first dummy pixel circuit and a display pixel circuit. The display panel is configured to drive the first dummy pixel circuit according to a first test signal, and drive the display pixel circuit according to a driving signal, the first test signal is maintained at a value corresponding to a first gray level. The processor is electrically coupled to the display panel, and is configured to obtain a first test voltage change value cross a light-emitting element in the first dummy pixel circuit. The processor is configured to obtain a detection voltage change value cross a light-emitting element in the display pixel circuit. The processor is configured to adjust the driving signal according to the detection voltage change value, the first test voltage change value and a second test voltage change value. The second test voltage change value is obtained by detecting a second dummy pixel circuit or from a memory unit.

It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the disclosure as claimed.

