Disclosed is an electronic device including a display panel displaying an image, a source driver supplying a source voltage to the display panel, and a display driver integrated circuit (DDI) including a timing controller controlling the source driver. The timing controller may be configured to identify information associated with a luminance of the image and to set a source bias current for controlling a slew rate of the source voltage based on the luminance of the image. Besides, various embodiments as understood from the specification are also possible.

A driving method of a display panel includes: determining a brightness band of the display panel, wherein brightness bands include a first brightness band to an N.sup.th brightness band, maximum grayscale brightness of the first brightness band to the N.sup.th brightness band decreases sequentially, and each brightness band includes three Gamma correction curves respectively corresponding to a first light emitting unit, a second light emitting unit, and a third light emitting unit each of an (N−M).sup.th brightness band to the N.sup.th brightness band also corresponds to at least one duty ratio; determining an input data voltage corresponding to at least one light emitting unit based on a Gamma correction curve that corresponds to the determined brightness band and an image to be displayed; and driving the display panel to display the image based on the determined input data voltage, or the determined input data voltage and the duty ratio.

A driving method of LED display, configured to be applied to an LED display capable of varying a refresh rate thereof and able to reduce brightness changes due to refresh rate variation, is disclosed in the present disclosure. This driving method includes: controlling an organic light-emitting diode of the LED display by an emission signal having a plurality of frame periods, with each of the frame periods having a PWM part with a duty ratio; detecting whether a change in the refresh rate of the LED display exists; and performing a compensation procedure when the change is detected, with the compensation procedure compensating a brightness difference of the organic light-emitting diode occurring due to the change in the refresh rate by adjusting the duty ratio of the PWM part. Said LED display is also disclosed.

[Object] Provided is electronic equipment that prevents degradation of image quality of captured images and display quality of a display section.

[Solving Means] The electronic equipment includes a display section, an imaging section disposed opposite to a display surface of the display section, and a control section that synchronizes a display timing of the display section with an imaging timing of the imaging section such that the imaging section performs imaging at a timing when the display section does not perform displaying.

A driving method includes, at a first display brightness value, inputting a pulse-width modulation signal with a duty ratio of X, and controlling a light-emitting driving current of a sub-pixel unit to be M, wherein X and M are obtained according to a first modulation rule; and at a second display brightness value, inputting the pulse-width modulation signal with a duty ratio of Y1, and controlling the light-emitting driving current of the sub-pixel unit to be N1, wherein the first display brightness value is greater than the second one, wherein, when the duty ratio and the light-emitting driving current corresponding to the second display brightness value are obtained according to the first modulation rule, the duty ratio corresponding to the second display brightness value is Y2, the light-emitting driving current corresponding to the second display brightness value is N2, Y1 is smaller than Y2, and N1 is greater than N2.

A display device includes: a plurality of pixels to receive data voltages based on converted grayscales; and a grayscale converter to: calculate first compensation offsets based on positions of the pixels and input grayscales for the pixels; convert the first compensation offsets into second compensation offsets according to a maximum luminance weight based on an input maximum luminance; and calculate the converted grayscales by applying the second compensation offsets to the input grayscales.

A screen saver controller including a load calculator configured to generate load data of an image represented by input image data, a maximum gray level calculator configured to generate maximum gray level data of the image represented by the input image data, and a screen saver data generator configured to determine a gain of a screen saver mode based on the load data and the maximum gray level data when the screen saver mode is operated and to generate screen saver data based on the input image data and the gain.

A method for improving a halo is applied to a display panel. The display panel includes a dimming sub-panel and a display sub-panel that are superposed. The dimming sub-panel includes a plurality of first pixels, the display sub-panel includes a plurality of second pixels, and each first pixel corresponds to at least two second pixels. The method for improving the halo includes: as for the first pixel: acquiring a second brightness datum of each of the at least two second pixels corresponding to the first pixel; calculating a target brightness datum of the first pixel according to second brightness data of the at least two second pixels; determining a first gray-scale datum of the first pixel according to the target brightness datum.

A voltage converter includes an input voltage line; an inductor coupled to the input voltage line; transistors coupled to the inductor; an output voltage line coupled to at least one of the transistors; a current sensor coupled to at least one of the input voltage line, the inductor, or the output voltage line; and a comparator coupled between the current sensor and the transistors. A DC-DC converter may include a voltage converter having an inductor and a plurality of transistors and configured to convert an input voltage into a power voltage and output the power voltage to an output terminal, an input current sensor configured to sense the input current of the converter, and a controller configured to change the slew rate of an inductor voltage in response to the input current of the converter and a preset reference current.

A method for providing a preview and an electronic device for displaying a preview are provided. The electronic device includes a camera module, a display, a processor operatively connected to the camera module and the display, and a memory operatively connected to the processor, wherein the memory stores instructions which, when executed, cause the processor to acquire original image frames through the camera module, display, on the display, first preview image frames corresponding to the acquired original image frames, receive an input for requesting dynamic-tone-mapping-based recording, perform the dynamic-tone-mapping-based recording in response to the reception of the input, and while performing the dynamic-tone-mapping-based recording, generate second preview image frames by performing dynamic-tone-mapping processing to first preview image frames acquired after a time point at which the input is received, and display the generated second preview image frames on the display. Various other embodiments are possible.