Abstract: A method of changing the brightness of light emitted by first and second light emitting diodes (LEDs) operated by respective first and second pulse width modulation (PWM) control signals includes the steps of (a) changing a first PWM control signal that operates a first LED from a first initial PWM value at a first rate of change to achieve a threshold PWM value at a predetermined point in time; (b) changing a second PWM control signal that operates a second LED from a second initial PWM value at a second rate of change to achieve the threshold PWM value at the predetermined point in time; and (c) subsequent to the predetermined time, changing both the first PWM control signal and the second PWM control signal from the threshold PWM value to achieve a final PWM value.

Abstract: A method of changing the brightness of light emitted by first and second light emitting diodes (LEDs) operated by respective first and second pulse width modulation (PWM) control signals includes the steps of (a) changing a first PWM control signal that operates a first LED from a first initial PWM value at a first rate of change to achieve a threshold PWM value at a predetermined point in time; (b) changing a second PWM control signal that operates a second LED from a second initial PWM value at a second rate of change to achieve the threshold PWM value at the predetermined point in time; and (c) subsequent to the predetermined time, changing both the first PWM control signal and the second PWM control signal from the threshold PWM value to achieve a final PWM value.

Abstract: A method of monitoring the operating status of one or more LEDs contained in a vehicle lamp array includes an initial step of calculating which of the LEDs are to be turned on (and/or at what PWM rate those LEDs are to be illuminated) using the desired brightness signals. The PWM rates that correspond with desired brightness signals are stored in a memory device. The stored PWM rates are then sent to one or more switching elements connected between the LEDs and a source of electrical energy. The operating statuses of the LEDs are sent back to the memory device and stored therein. The actual brightness of the LEDs is compared with a predetermined minimum brightness for that LED(s). Lastly, an alarm is generated if the actual brightness of the LEDs is not at least equal to the predetermined minimum brightness for the same LED(s) stored in the memory device.

Abstract: A method of monitoring the operating status of one or more LEDs contained in a vehicle lamp array includes an initial step of calculating which of the LEDs are to be turned on (and/or at what PWM rate those LEDs are to be illuminated) using the desired brightness signals. The PWM rates that correspond with desired brightness signals are stored in a memory device. The stored PWM rates are then sent to one or more switching elements connected between the LEDs and a source of electrical energy. The operating statuses of the LEDs are sent back to the memory device and stored therein. The actual brightness of the LEDs is compared with a predetermined minimum brightness for that LED(s). Lastly, an alarm is generated if the actual brightness of the LEDs is not at least equal to the predetermined minimum brightness for the same LED(s) stored in the memory device.