A control circuit may be configured to control light emitting diode (LED) driver circuits. The control circuit may be configured to generate a multicast of pixel intensity values based on data in memory or data received from a data source, and output the multicast on an interface, which may comprise a one-wire uni-directional interface. In some examples, a plurality of drivers may receive the multicast, and each of the plurality of drivers may drive different sets of LEDs based on the multicast.

A lighting control device switches an input voltage to generate an output voltage and supplies a driving current based on the output voltage to a lighting unit. A raw control signal is generated to specify a lighting period and an extinction period alternately, and a corrected control signal is generated by correcting the raw control signal based on the current through the lighting unit. A switching controller performs the switching of the input voltage during the lighting period specified by the corrected control signal and suspends the switching of the input voltage during the extinction period specified by the corrected control signal.

Embodiments of the present disclosure include a wireless remote control or remote control application for controlling the lighting of an electronic personal transportation vehicle. Embodiments can solve problems related to sharing electronic personal transportation vehicles by uniquely identifying a user, and allowing that user to control the lighting of the electronic personal transportation vehicle. In this manner, other users can control the lighting at different times, depending on the specific person that is using the electronic personal transportation vehicle at any given time.

A first light emitting unit includes M (M≥2) first light emitting elements provided in series. A second light emitting unit including N (N<M) second light emitting elements and a switching transistor are provided on a path parallel to the first light emitting unit. A constant-current driver is connected in series to both the first light emitting unit and the second light emitting unit, and generates a drive current. A drive circuit includes a capacitor provided between a gate and a drain of the switching transistor, and causes the gate of the switching transistor to generate a drive signal according to a switching signal.

A vehicle headlight (10) includes a light source unit (30) including a plurality of light emitting elements (35), a reflector (39) that scans light from the plurality of light emitting elements (35) to form a light distribution pattern (350), and a control unit (60). The control unit (60) controls the light source unit (30) such that the light amount of light emitted from some light emitting elements to a predetermined region (AR) overlapping a target object does not change and the light amount of light emitted from other some light emitting elements to the predetermined region (AR) overlapping the target object changes among the light emitting elements that emit light to the predetermined region (AR) overlapping the target object in the superimposition region (PA).

A vehicle headlight (1) includes a first lamp unit (10), a second lamp unit (20), a region determination unit (55), and a control unit (CO). A first irradiation spot (S1f) overlaps with a second irradiation spot (S2). The control unit (CO) controls the first lamp unit (10) so that an amount of the light of a light emitting element (13f) corresponding to the first irradiation spot (S1f) overlapping with a predetermined region (80) is reduced, and controls the second lamp unit (20) so that an amount of the light of a light emitting element (23) corresponding to the second irradiation spot (S2) overlapping with the predetermined region (80) is reduced or becomes 0, and light is emitted from the light emitting element (23) corresponding to the second irradiation spot (S2) overlapping with the first irradiation spot (S1f) and not overlapping with the predetermined region (80).

An apparatus for displaying at least one virtual lane line based on an environmental condition and a method of controlling the same. The method includes recognizing an actual lane line of a vehicle traveling direction through at least one sensor, determining whether a head-up display (HUD) has been installed in a vehicle, upon determining that the HUD has been installed in the vehicle, displaying a first virtual lane line corresponding to the recognized actual lane line through the HUD and displaying a second virtual lane line corresponding to the recognized actual lane line on a road surface through a headlamp, and upon determining that the HUD has not been installed in the vehicle, displaying only a third virtual lane line corresponding to the recognized actual lane line through the headlamp.

Control device for controlling an auxiliary light mounted to a vehicle having a first manually operable user input device (not shown) operable to cause generating a first signal and a second signal. The control device includes: at least two inputs including a first input configured to receive the first signal, and a second input configured to receive the second signal; an output configured to operably couple to the light to provide a control signal to cause the driving light to illuminate; and a logic circuit coupling each input to the output. The logic circuit includes a nonmechanical electronic switch operable to generate the control signal and provide the control signal to the output. The logic circuit operates the switch to generate the control signal responsive to the first input receiving the first signal, and the second input receiving the second signal.

A light emitting apparatus including: a light emitting array having at least one light emitting string of serial connected light emitting elements, wherein a bypass switch is connected in parallel to each light emitting element of said light emitting string; and a driving control unit controlling a shift timing of the bypass switches to reduce a variation of a voltage drop across the light emitting string.

A supply circuit adapted to provide a continuous power supply for a string of serially connected light emitting elements driven with a current source, said supply circuit including: a voltage supply capacitor connected to said string and being adapted to provide a supply voltage for a driving control unit configured to control the light emitting elements of said string; and a capacitor bypass switch connected in parallel with said voltage supply capacitor and being controlled by a local control circuit of said driving control unit, wherein said capacitor bypass switch is switched off by said local control circuit to charge said voltage supply capacitor with a charging current to maintain a continuous power supply without disturbing the current to said string of light emitting elements.