Disclosed is a power module which includes a first power module that generates a first output current based on a first input voltage, a second power module that generates a second output voltage based on a second input voltage, generates a second output current based on the second output voltage, and generates the second output current when a level of the first input voltage is smaller than a level of a reference voltage, and a voltage controller that generates a feedback signal for regulating at least one of the level of the first input voltage and a level of the second input voltage based on current information about a current flowing in the power module.

The present disclosure provides a display panel and a driving method thereof. The display panel includes a power supply module configured to provide a drive current for the drive module, a drive module configured to output a drive current to drive the light-emitting module to emit light, a current detection module configured to detect the drive current and output detection signals to the control module according to the detection result, and a control module configured to adjust the grayscale value of the pixels of the display panel according to the detection signals.

A display device includes: a display panel including pixels emitting light, based on a data voltage; a current limiter for determining a scale factor by comparing a previous frame load with a predetermined threshold load, and generating compensated image data by applying the scale factor to current image data as input image data of a current frame to adjust the data voltage; and a data driver for converting the compensated image data into the data voltage and providing the data voltage to the display panel.

A drive control circuit is disclosed, and the drive control circuit is connected in series between a driving circuit and a first voltage terminal and forms a loop together. The drive control circuit comprises a current adjustment circuit and a control circuit. The current adjustment circuit controls a current in the loop according to a voltage signal difference between a voltage signal of a second node and a voltage signal of a first node. The control circuit controls the voltage signal of the second node according to the voltage signal of the first node, so that the current adjustment circuit controls the current in the loop during a start-up phase of the driving circuit.

The present application discloses an over-current protection method for display panel and a display device. The over-current protection method for display panel includes the following steps: calculating current input by a level shifter during a first preset time of a first clock signal after the first clock signal is received; determining whether the current input by the level shifter during the first preset time is larger than a first preset current; controlling the level shifter to stop running in determining that the current input by the level shifter during the first preset time is larger than the first preset current.

A display device includes: a display region including a first pixel region, a second pixel region, and a third pixel region; a dummy region including a first dummy region disposed between the second pixel region and the third pixel region; first, second, and third pixels respectively arranged in the first pixel region, the second pixel region, and the third pixel region in a matrix of vertical lines and horizontal lines; a data converter configured to: receive first image data including effective data corresponding to the display region and dummy data corresponding to the dummy region; and generate second image data by converting a gray scale value of dummy data corresponding to at least one region of the first dummy region in the first image data into a predetermined first gray scale value, the first gray scale value being between a lowest gray scale value and a highest gray scale value.

A display device includes a liquid crystal display panel, two electrodes in the liquid crystal display panel, a switching element having a source and a drain one of which is coupled to one of the two electrodes, a scan line coupled to a gate of the switching element, a signal line coupled to the other of the drain and the source, an inversion driver, and a scan circuit configured to provide, to the scan line, any of a first potential, a second potential, and a third potential lower than the second potential. The scan circuit switches a potential of the scan line from the second potential to the third potential at a timing at which the potential of the other of the two electrodes is made lower than that of the one of the two electrodes in a period in which the source and the drain are electrically disconnected.

An image display apparatus is disclosed. The image display apparatus includes a display and a power supply configured to supply driving voltage to the display, wherein the power supply includes a converter to convert input AC voltage into DC voltage and a controller to control the converter, the converter includes a first leg including a first switching device and a second switching device connected to each other in series and a second leg including a first diode and a second diode connected to each other in series, the first diode and the second diode connected to the first leg in parallel, and the controller controls on time of the first switching device to gradually increase from a first level to a second level for a first period for which the input AC voltage rises after a zero crossing point.

A control method for the an electrochromic device includes: determining whether a current transmittance of the electrochromic device reaches a preset transmittance; when determining that the current transmittance does not reach the preset transmittance, controlling an external power supply to perform a first mode charging and discharging on the electrochromic device until the current transmittance reaches the preset transmittance; when determining that the current transmittance reaches the preset transmittance, suspending the charging and discharging, and continuously monitoring whether a current open circuit potential of the electrochromic device is within a preset open circuit potential threshold range; and if the current open circuit potential is not within the preset open circuit potential threshold range, controlling the external power supply to perform a second mode charging and discharging on the electrochromic device to enable the current open circuit potential to be continuously within the preset open circuit potential threshold range.

A pixel includes: a driving transistor including a gate electrode coupled to a first node, a first electrode coupled to a second node, and a second electrode coupled to a third node; a first initialization transistor coupled between the first node and a first initialization voltage line, and including a gate electrode coupled to a scan line, where the first initialization voltage line is configured to supply a first initialization voltage; a first emission control transistor coupled between a fourth node and a fifth node and including a gate electrode coupled to the first node; a second emission control transistor coupled between the third node and the fifth node and including a gate electrode coupled to an emission control line; and a light-emitting element coupled between the fourth node and a driving low voltage line. The driving transistor and the first emission control transistor are different types of transistors.