High speed, high current pulsed driver circuit
First Claim
Patent Images
1. A system comprising:
- a light emitting diode (LED); and
a LED driver circuit that comprises;
an nMOS transistor; and
a pMOS transistor, wherein gates of the nMOS transistor and the pMOS transistor are electrically connected to a pulsed trigger source that emits a pulsed trigger signal, wherein the LED driver circuit is configured to deliver pulsed current to the LED as a function of the pulsed trigger signal, wherein the pulsed current has a peak amplitude that is greater than a maximum continuous forward current rating of the LED, the LED emits pulses of light in correspondence with the pulsed current.
3 Assignments
0 Petitions
Accused Products
Abstract
Various technologies presented herein relate to driving a LED such that the LED emits short duration pulses of light. This is accomplished by driving the LED with short duration, high amplitude current pulses. When the LED is driven by short duration, high amplitude current pulses, the LED emits light at a greater amplitude compared to when the LED is driven by continuous wave current.
30 Citations
20 Claims
-
1. A system comprising:
-
a light emitting diode (LED); and a LED driver circuit that comprises; an nMOS transistor; and a pMOS transistor, wherein gates of the nMOS transistor and the pMOS transistor are electrically connected to a pulsed trigger source that emits a pulsed trigger signal, wherein the LED driver circuit is configured to deliver pulsed current to the LED as a function of the pulsed trigger signal, wherein the pulsed current has a peak amplitude that is greater than a maximum continuous forward current rating of the LED, the LED emits pulses of light in correspondence with the pulsed current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An apparatus comprising:
-
a light emitting diode (LED); and a driver circuit that comprises; an nMOS transistor; and a pMOS transistor, where gates of the nMOS transistor and the pMOS transistor are coupled to one another such that the nMOS transistor and the pMOS transistor are activated by a common input signal, wherein the driver circuit drives the LED with short duration, high-amplitude current pulses, wherein the driver circuit is a bipolar driver circuit, each pulse in the short duration, high-amplitude current pulses has a duration of between 5 and 100 ns, and wherein each pulse in the short duration, high-amplitude current pulses has an amplitude that is greater than a maximum continuous forward current rating of the LED. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A method comprising:
-
electrically arranging a plurality of driver circuits in parallel with one another, wherein each driver circuit in the plurality of driver circuits is configured to emit pulsed current, and further wherein each driver circuit comprises; an nMOS transistor; and a pMOS transistor, wherein gates of the nMOS transistor and the pMOS transistor are electrically connected to a pulsed trigger source that emits a pulsed trigger signal, the light emitting diode (LED) driver circuit delivers the pulsed current as a function of the pulsed trigger signal; and electrically coupling the plurality of driver circuits to at least one LED, such that the pulsed current emitted from the plurality of driver circuits causes the LED to emit pulses of light, wherein the pulsed current has a peak amplitude that is greater than a maximum continuous forward current rating of the LED, the LED emits pulses of light in correspondence with the pulsed current. - View Dependent Claims (17, 18, 19, 20)
-
Specification