To achieve visibility improvement and reduction of sense of incongruity in a vehicular lamp using LEDs. A lighting control device for controlling the on/off of a light source having a first and a second lamp unit each with LEDs including: a control part that generates a control signal for controlling the emitted lights of the lamp units; and a light source drive part for driving the lamp units based on the control signal; where the light emitted from the two lamp units driven by the light source driving part is such that each luminous intensity decreases from a first value to a second value which is smaller than the first value within a common period, and each luminous intensity decreases to the second value during the common period maintaining the relationship that the luminous intensity of the first lamp unit is lower than that of the second lamp unit.

Systems and methods to proactively adapt image sensor settings of an occupant monitoring system to accommodate ambient lighting changes are provided. The system may track current ambient light, track the driver, and predict upcoming changing lighting conditions. Sensors are used to predict when the ambient light will change and preemptively adjust to prevent dark or washout images. The sensor adjustment may be timed so that the adjustment is made just in time or concurrently with the change in ambient light conditions. The system may predict when the light on the occupant's face will change and proactively readjust the settings of the sensor to accommodate the changed lighting conditions.

A screen control apparatus of a moving object, a method thereof, and a system thereof are provided. The screen control apparatus includes: a communication device that receives illumination measurement data measured by at least one information providing moving object from a server; an illumination score calculating device that calculates an illumination score for the received illumination measurement data; an illumination determining device that selects reference illumination measurement data depending on the illumination score and determine illumination; and a controller that controls a screen brightness on the basis of the determined illumination.

A screen control apparatus of a moving object, a method thereof, and a system thereof are provided. The screen control apparatus includes: a communication device that receives illumination measurement data measured by at least one information providing moving object from a server; an illumination score calculating device that calculates an illumination score for the received illumination measurement data; an illumination determining device that selects reference illumination measurement data depending on the illumination score and determine illumination; and a controller that controls a screen brightness on the basis of the determined illumination.

Multiple light sources are arranged in an array. A light guide member receives light emitted from the multiple light sources on its back face, and outputs the light thus received from its front face. The light guide member has a base portion such that its back face faces the multiple light sources and such that it extends in the array direction of the multiple light sources. Multiple back-face protrusions and multiple front-face protrusions are formed such that they protrude from the back face and the front face of the base portion. The front-face protrusion has multiple continuous faces in the circumferential direction along the front face of the base portion.

A PWM lighting bridge manages hardware PWM compensation components. One or more PWM outputs are driven based upon a master PWM input signal. The master PWM input signal is processed through a mapping function to produce a desired output signal(s) on the one or more PWM outputs. The mapping function comprises a set of compensation bins having a maxim input duty cycle, a minimum input duty cycle and an output duty cycle. The mapping process selects a bin based on determining whether the input duty cycle is within the minimum and maximum duty cycle ranges of the bins and then uses the specified output duty cycle for the one or more PWM outputs. The PWM lighting bridge provides configuration and runtime management of the hardware PWM compensation components. Read/write access to the PWM compensation bins provides customizable configurations of the input and output PWM characteristics.

A PWM lighting bridge manages hardware PWM compensation components. One or more PWM outputs are driven based upon a master PWM input signal. The master PWM input signal is processed through a mapping function to produce a desired output signal(s) on the one or more PWM outputs. The mapping function comprises a set of compensation bins having a maxim input duty cycle, a minimum input duty cycle and an output duty cycle. The mapping process selects a bin based on determining whether the input duty cycle is within the minimum and maximum duty cycle ranges of the bins and then uses the specified output duty cycle for the one or more PWM outputs. The PWM lighting bridge provides configuration and runtime management of the hardware PWM compensation components. Read/write access to the PWM compensation bins provides customizable configurations of the input and output PWM characteristics.

To more appropriately adjust the brightness inside a vehicle. Provided is a system including: a first vehicle configured to output, to a server, information regarding illuminance of light incident on a vehicle by associating with information regarding a traveling environment; a second vehicle configured to output information regarding a traveling environment to the server; and the server including a controller configured to generate, based on the information regarding the illuminance of the light incident on the first vehicle, information regarding a sudden-change point that is a point at which a change amount of the illuminance of the light incident on the first vehicle exceeds a prescribed value, and configured to output, based on the information regarding the traveling environment of the second vehicle acquired from the second vehicle, information regarding the sudden-change point to the second vehicle.

This LED driving device comprises: a DC/DC controller which controls an output stage for supplying an output voltage to an LED; and a current driver which generates an output current of the LED, wherein the current driver performs PWM dimming by turning on the output current in accordance with an LED-current-on period of a PWM dimming signal and turning off the output current in accordance with an LED-current-off period of the PWM dimming signal, and the DC/DC controller includes a feedback control unit which performs feedback control for outputting a switching pulse to the output stage so as to make a cathode voltage of the LED equal to a reference voltage, and a pulse addition control unit which performs pulse addition control for adding a predetermined pulse number of additional switching pulses at a time of switching between the LED-current-on period and the LED-current-off period.

This LED driving device comprises: a DC/DC controller which controls an output stage for supplying an output voltage to an LED; and a current driver which generates an output current of the LED, wherein the current driver performs PWM dimming by turning on the output current in accordance with an LED-current-on period of a PWM dimming signal and turning off the output current in accordance with an LED-current-off period of the PWM dimming signal, and the DC/DC controller includes a feedback control unit which performs feedback control for outputting a switching pulse to the output stage so as to make a cathode voltage of the LED equal to a reference voltage, and a pulse addition control unit which performs pulse addition control for adding a predetermined pulse number of additional switching pulses at a time of switching between the LED-current-on period and the LED-current-off period.