Self-identifying solid-state transducer modules and associated systems and methods
View Patent ↗Self-identifying solid-state transducer (SST) modules and associated systems and methods are disclosed herein. In several embodiments, for example, an SST system can include a driver and at least one SST module electrically coupled to the driver. Each SST module can include an SST and a sense resistor. The sense resistors of each SST module can have at least substantially similar resistance values. The SSTs of the SST modules can be coupled in parallel across an SST channel to the driver, and the sense resistors of the SST modules can be coupled in parallel across a sense channel to the driver. The driver can be configured to measure a sense resistance across the sense resistors and deliver a current across the SSTs based on the sense resistance.
1. A method of operating a solid-state transducer (SST) system, the method comprising:
coupling at least one SST module and a supplemental resistor to a driver, wherein—
each SST module includes at least one SST and at least one sense resistor,
the sense resistors of the SST modules and the supplemental resistor are coupled in parallel to a sense channel of the driver, and
the SSTs of the SST modules are coupled in parallel to an SST channel of the driver;
detecting a sense resistance across the sense channel; and
supplying, via the driver, a current across the SST channel based on the sense resistance.
2. The method of claim 1 wherein the sense resistance comprises a first sense resistance and the current comprises a first current, the method further comprising:
coupling an additional SST module to the driver;
detecting a second resistance across the sense channel, wherein the second resistance is different from the first sense resistance; and
supplying, via the driver, a second current across the SST channel based on the second resistance, wherein the second current is different from the first current.
3. The method of claim 2 wherein the second sense resistance is less than the first sense resistance and wherein the second current is greater than the first current.
4. The method of claim 2 wherein—
the additional SST module includes an additional SST and an additional sense resistor, and
coupling the additional SST module to the driver comprises electrically coupling the additional sense resistor to the sense channel in parallel with the sense resistors of the other SST modules and the supplemental resistor and coupling the additional SST to the SST channel in parallel with the other SSTs of the other SST modules.
5. The method of claim 4 wherein the additional sense resistor has a resistance value within 5% of at least one of the other sense resistors.
6. The method of claim 1 wherein—
the sense resistance comprises a first sense resistance,
the current comprises a first current,
each of the sense resistors in the SST modules have resistances substantially equal to a first resistance value, and
the supplemental resistor has a resistance equal to a second resistance value, the method further comprising:
modulating the supplemental resistor to move the resistance of the supplemental resistor to a third resistance value different from the second resistance value,
detecting a second sense resistance across the sense channel, wherein the second sense resistance is different from the first sense resistance; and
supplying, via the driver, a second current across the SST channel based on the second sense resistance, wherein the second current is different from the first current.
7. A solid-state transducer (SST) system, comprising:
a plurality of SST modules, the individual SST modules including at least one SST and at least one sense resistor;
a supplemental resistor; and
a driver electrically coupled to the plurality of SST modules and to the supplemental resistor, wherein—
the SSTs of the SST modules are electrically coupled together in a first parallel circuit,
the sense resistors of the SST modules and the supplemental resistor are electrically coupled together in a second parallel circuit,
the first and second parallel circuits are electrically coupled to separate channels of the driver, and
the driver is configured to deliver current to the first parallel circuit proportional to a resistance measured from the second parallel circuit.
8. The SST system of claim 7 wherein the supplemental resistor is configured to modulate an emission output of the SSTs.
9. The SST system of claim 7 wherein the second parallel circuit has a circuit resistance corresponding to wire, trace, and connection resistance in the second parallel circuit, and wherein each of the sense resistors has a substantially higher resistance value than the circuit resistance.
10. The SST system of claim 7 wherein the sense resistor in each SST module has a resistance of at least 1 kΩ.
11. The SST system of claim 7 wherein the sense resistors of the individual SST modules have sense resistance values within 5% of each other.
12. The SST system of claim 11 wherein the supplemental resistor has a supplemental resistance value substantially equivalent to the sense resistance values of the sense resistors of the individual SST modules.
13. The SST system of claim 11 wherein the supplemental resistor has a supplemental resistance value substantially different from the sense resistance values of the sense resistors of the individual SST modules.
14. The SST system of claim 7 wherein the supplemental resistor comprises a variable resistor.
15. The SST system of claim 7 wherein the SSTs in the first parallel circuit are configured to emit an amount of light proportional to the current delivered to the first parallel circuit from the driver.
16. A method of forming a solid-state transducer (SST) system, comprising:
electrically coupling at least one SST module to a driver having an SST channel and a sense channel, wherein each of the at least one SST modules comprises at least one SST and at least one sense resistor, and wherein electrically coupling the at least one SST module to the driver comprises—
coupling each of the SSTs to the SST channel in a first parallel circuit, and
coupling each of the sense resistors to the sense channel in a second parallel circuit;
electrically coupling a supplemental resistor to the second parallel circuit such that the supplemental resistor is coupled in parallel with each of the sense resistors, wherein the supplemental resistor is not part of an SST module;
detecting a sense resistance across the sense channel;
providing a current to the SSTs in the first parallel circuit via the SST channel, wherein the current is based on the sense resistance;
monitoring emission outputs from the SSTs; and
modulating the supplemental resistor in response to determining that the emission outputs are sufficiently different from a predetermined emission output.
17. The method of claim 16 , wherein the sense resistance comprises a first sense resistance and the current comprises a first current, the method further comprising:
after modulating the supplemental resistor, detecting a second sense resistance different from the first resistance across the sense channel; and
providing a second current to the SSTs in the first parallel circuit via the SST channel, wherein the second current is based on the second sense resistance and is different from the first current.
18. The method of claim 16 wherein modulating the supplemental resistor comprises laser trimming the supplemental resistor.
19. The method of claim 16 wherein modulating the supplemental resistor comprises changing a resistance value of the supplemental resistor.
20. The method of claim 16 wherein individual of the sense resistors have resistance values within 5% of one another.