Provided are a pixel circuit, a method for driving the pixel circuit, and a display panel. The pixel circuit includes a drive transistor including a gate terminal, a source terminal, a drain terminal, and a body terminal, where the source terminal is connected to a first power line, the body terminal is connected to a second power line, and the gate terminal of the drive transistor is connected to a gate potential control circuit; the first power line is configured to provide a first voltage or a second voltage, where the first voltage is higher than the second voltage; and the second power line is configured to provide the fixed first voltage.

A reflective-type display screen and a control method thereof, and a display device are provided. The reflective-type display screen comprises, a display panel, a compensation light source, a detector module and a processor module. The display panel comprises a reflection surface, the display panel is configured to reflect light by the reflection surface to realize display; the compensation light source is in the display panel; the detector module is on a light-outputting side of the display panel and is configured to acquire an intensity of ambient light outside the display screen; and the processor module is respectively connected with the detector module and the compensation light source and is configured to control operation of the compensation light source based on the intensity of the ambient light acquired by the detector module.

Provided is a SIMBO buck-boost inverting converter including: a power stage for receiving an input voltage to generate first and positive output voltages and a negative output voltage, the power stage including a plurality of switches and an inductor; a control circuit for generating a plurality of control voltages based on the first and the second positive output voltages, the negative output voltage and a current of the inductor; an energy generation and distribution circuit for generating a plurality of duty cycles based on the control voltages; and a logic control and gate driving circuit for generating a plurality of switch control signals for controlling the switches of the power stage based on the duty cycles; wherein the control circuit and the energy generation and distribution circuit feedback-control and adjust the duty cycles to adjust a balance between an input energy and an output energy.

An electronic device is provided. The electronic device includes a housing, a display rollable into the housing, and a display driver circuitry operably coupled to the display. The display driver circuitry is configured to display, while the electronic device is in a first state in which a first display area of the display is exposed and a second display area of the display adjacent to the first display area is rolled into the housing, a first image in the exposed first display area, obtain, a second image based on applying a first weight to a pixel value of a first pixel of a first horizontal line and applying a second weight less than the first weight to a pixel value of a second pixel of the first horizontal line, and display, while displaying the first image, the second image in the second display area rolled into the housing.

A power circuit according to the present disclosure may include a multiplexer connected to a first power line and a second power line and selecting and outputting one of a first voltage supplied through the first power line and a second voltage supplied through the second power line. Further, the power circuit may include a first power circuit which generates a first driving voltage and a second driving voltage by using a voltage supplied from the multiplexer, recognizes whether there is the first voltage supplied through the first power line, and does not output the first driving voltage when the first voltage is not recognized.

A display apparatus includes a display panel displaying an image based on input image data, a driving controller determining a low frequency driving mode and a normal driving mode based on the input image data, a gate driver outputting a gate signal, a data driver outputting a data voltage, and a power voltage generator outputting power voltages. The driving controller is configured to generate a writing frame in which data is written in a pixel of the display panel and a holding frame in which the written data is maintained without writing data in the pixel in the low frequency driving mode. The driving controller is configured to operate at least one of the driving controller, the data driver, and the power voltage generator in a power reducing mode during the holding frame.

Particular embodiments described herein provide for an electronic device that includes a display and is configured enabling a low power refresh during a semi-active workload. The electronic device includes a display engine, where the display engine generates a video stream with a frame rate, a display, where the display includes an image viewable by a user and the image is refreshed at a first refresh rate, and a timing controller located in the display, where the timing control receives an indicator from the display engine and uses the indicator to determine that the first refresh rate can be lowered to a second refresh rate without the frame rate of the video stream from the display engine being changed. In an example, the indicator is frame with no image data at the start of the frame. In another example, the indicator is an implicit indictor sent by the display engine.

A fingerprint sensing device and an operation method thereof are provided. The fingerprint sensing device includes a driver integrated chip and a fingerprint sensor. The driver integrated chip is coupled to a host processor. The fingerprint sensor is coupled to the driver integrated chip and the host processor. The fingerprint sensor obtains a fingerprint image during a period when the host processor is in the sleep mode. The driver integrated chip performs a fingerprint verification on the fingerprint image, and the driver integrated chip determines to wake up the host processor according to whether the fingerprint image passes the fingerprint verification.

Disclosed herein is a method of operating a display panel having a matrix of display elements. The method includes ordered steps of: (1) causing flow of current from a source of power, into an anode of a given display element, out of a cathode of the given display element to ground, wherein the flow of current into the anode and out the cathode to ground results in charging of a parasitic capacitance associated with the anode, (2) transferring charge from a storage capacitor to a parasitic capacitance associated with the cathode, and (3) stopping the flow of current, and then transferring charge from the parasitic capacitance associated with the anode to the storage capacitor.

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.