The invention relates to a system for displaying information to a user, comprising: an emission device arranged to emit light so as to display information to a user, the emission device being adapted to emit the light in a pulsed manner so that the intensity of the light varies between a high value and a low value, a selective viewing device comprising a panel, the panel being adapted so that the user can view the light which is emitted by the emission device through that panel so as to visually perceive the information being displayed, the panel having a variable transparency which can be varied between a state of high transparency and a state of low transparency, the system being adapted to synchronize the emission device and the selective viewing device so that the states of the emission device emitting light at a high-intensity value and the states of the panel of the selective viewing device of high transparency overlap in time, the emission device being adapted so that the light is emitted in a pulsed manner with a duty cycle of less than or equal to 1/10, wherein the panel of the selective viewing device is adapted to operate at essentially the same duty cycle.

A display device may include a pixel, an emission control driver, and a timing controller. The emission control driver may supply an emission control signal set for controlling emission periods of the pixel. The timing controller may receive a received bit stream that includes a first bit set and a second bit set, may determine a first duty ratio of the emission control signal set using bits of the first bit set without using any bit of the second bit set. The first bit set may include at least two bits. The second bit set may include at least one bit. The emission control signal set may control the pixel to operate according to the first duty ratio for each frame of a first frame group.

The present application provides a method for driving a mini-LED backlight module. The method includes dividing the mini-LED backlight module into a plurality of partitions along an extending direction of a data line, dividing a period of each frame used in the mini-LED backlight module into an adjusting sub-field, and adjusting durations of a bright sub-field or a dark sub-field of the adjusting sub-field corresponding to different partitions based on different gray modes. In such a way, the brightness of each partition falls within a configured brightness threshold range.

Provided are a display panel and a display device. The display panel includes a first light-emitting element, a second light-emitting element, a first driver circuit and a second driver circuit. The first driver circuit is electrically connected to the first light-emitting element and configured to provide a first drive current to the first light-emitting element to control the first light-emitting element to emit light, and the second driver circuit is electrically connected to the second light-emitting element and configured to provide a second drive current to the second light-emitting element to control the second light-emitting element to emit light. At least at a maximum grayscale, an average current value of the first drive current is greater than an average current value of the second drive current.

Disclosed are a display driving circuit and a frequency correction method of the display driving circuit, capable of quickly correcting a frequency change of a clock signal when a display device is driven at a low scan rate.

Systems and methods for preserving a pulse width modulation (PWM) resolution while increasing the frequency of a pulse width modulation (PWM) clock are provided. An electronic display backlight system may include a backlight element and backlight dimming circuitry. The backlight element may be driven according to a pulse width modulation (PWM) signal over a PWM clock cycle equal to a multiple M of a baseline PWM clock frequency associated with a baseline PWM resolution. The backlight dimming circuitry may receive a brightness code of the baseline PWM resolution and generate the PWM signal at least in part by dividing the brightness code by M.

The present application relates to a lightness adjusting method for a display system. The method includes the steps of: writing a first driving signal into a display panel; controlling a first lens and a backlight module to be turned on simultaneously, where a plurality of light-emitting elements of the backlight module are turned on simultaneously, and the first lens and the plurality of light-emitting elements of the backlight module are turned on simultaneously; adjusting a first turn-on time of each light-emitting element; controlling a second lens and the backlight module to be turned on simultaneously, where the plurality of light-emitting elements of the backlight module are turned on simultaneously, and the second lens and the plurality of light-emitting elements of the backlight module are turned on simultaneously; and adjusting a second turn-on time of each light-emitting element.

A method includes determining a number of drive pulses of equal width and amplitude that would drive LEDs with a total charge during a frame. If the width of the drive pulses is greater than a minimum-width and less than a maximum-width, the LEDs are driven with the drive pulses. If the width of the drive pulses is less than the minimum-width and an amplitude of the drive pulses is greater than a minimum-amplitude, decrement the amplitude of the drive pulses and recalculate the width of the drive pulses so each drive pulse has the decremented amplitude and recalculated width. If the amplitude of the drive pulses is equal to the minimum-amplitude, reduce the number of drive pulses and recalculate the width and amplitude of the reduced number of drive pulses. If the amplitude of the drive pulses is equal to the minimum-amplitude, the LEDs are not driven.

Disclosed is an LED display device, a driving method and a chip thereof. The LED display device comprises: a display array comprising row lines, column lines, and pixel units each comprising an LED connected to a corresponding one of the row lines and a corresponding one of the column lines; a row driver module, connected to the row lines and providing selection signals; a column driver module, connected to the column lines and providing driving signals corresponding to gray scale data according to pulse width modulation signals; a channel control module, connected to the column lines and adjusting a column-line voltage of a corresponding column line to a target voltage in a first time period when a corresponding pulse width modulation signal is active, thus improving constant current cut-in speed and improve consistency and linearity under low gray scale when an image with low gray scale is displayed.

A PWM controlled current source includes a selection input, a modulation input, a switchable current source which can be switched by means of a signal at a control terminal and whose current output is configured for connection to a load, and an inverter circuit including an input node and an output coupled to the control terminal. The inverter circuit has a capacitance conditioned by elements of the inverter circuit. A start signal can be supplied to the input node in dependence on a selection signal at the selection input, which controls the switchable current source via the inverter circuit. The PWM controlled current source also includes a voltage-to-current converter that generates a current derived from a modulation signal at the modulation input and supplies it to the input node. The supplied current disconnects the switchable current source after a time period predetermined by the conditioned capacitance.