Current Lighting Solutions v. Signify: 18-Patent LED Dispute Dismissed Without Prejudice
Current Lighting Solutions filed a declaratory judgment action in Massachusetts against Signify Holding and Signify North America, asserting 18 patents spanning LED drivers, optics, power control, and luminaire design. Judge O’Toole granted Signify’s motion to dismiss without prejudice after just 229 days — leaving the underlying IP dispute unresolved.
18-Patent LED Lighting DJ Action Falls on Procedural Grounds in Massachusetts
On June 22, 2023, Current Lighting Solutions, LLC filed a declaratory judgment action in the U.S. District Court for Massachusetts against Signify Holding, B.V. and its U.S. subsidiary Signify North America Corporation. The complaint placed 18 patents at the center of the dispute, covering a broad sweep of LED lighting technology: driver circuits, power factor correction, optical systems, LED collimators, switching arrangements, luminaire design, and start-up control methods. The case was assigned to Chief Judge George A. O’Toole.
Signify moved to dismiss at docket entry 22, and the court granted that motion in full via its Opinion and Order dated February 6, 2024 (Dkt. No. 63). The dismissal was entered without prejudice, meaning the court did not reach the merits of any patent claim. A without-prejudice dismissal in a declaratory judgment context typically indicates that the court found a threshold defect — most commonly subject-matter jurisdiction, standing, or ripeness — rather than ruling that Current Lighting’s patents are invalid or unenforceable.
The 229-day duration places resolution well before any claim construction or discovery phase, suggesting Signify’s procedural challenge was targeted and effective. What remains unknown from the public record is whether the parties have since negotiated a licensing arrangement, whether Current Lighting has cured the jurisdictional issue and refiled elsewhere, or whether Signify has pursued its own offensive IP strategy in the LED space. The without-prejudice nature of the dismissal preserves optionality for both sides.
Filing to voluntary dismissal in 229 days
229 days from filing to dismissal — resolved at motion stage, before discovery
Why a Without-Prejudice Dismissal Leaves the IP Dispute Open
Declaratory Judgment: Current Lighting Was Playing Offense
A declaratory judgment action is typically filed by a party that faces a credible threat of being sued. By filing first, Current Lighting sought a court ruling on patent validity or non-infringement before Signify could bring its own infringement claims. This procedural posture requires the plaintiff to demonstrate an actual, justiciable controversy — a threshold Signify successfully challenged at the motion-to-dismiss stage.
DJ jurisdiction challengedWithout Prejudice: No Merits Ruling, No Res Judicata Bar
A dismissal without prejudice does not adjudicate the underlying patent claims. Current Lighting retains the right to refile if it can cure the defect identified by the court — most likely a jurisdictional or standing issue. This is meaningfully different from a with-prejudice dismissal, which would bar refiling. The court’s Opinion and Order (Dkt. No. 63) governs, but the specific grounds are not detailed in the public verdict record.
Refiling remains possible18 Patents Across the Full LED Lighting Stack
The patent portfolio asserted spans the entire LED product stack: from upstream power electronics (driver ICs, power factor correction, switching arrangements) through optical systems (collimators, light-mixing devices) to end-product luminaires. This breadth suggests Current Lighting is asserting foundational technology IP rather than a single product feature — a posture consistent with an NPE or IP licensing entity seeking broad coverage across a defendant’s product range.
18 patents, full stackSignify’s Motion-to-Dismiss Win Avoids Discovery — For Now
By prevailing on a motion to dismiss before discovery, Signify avoided the substantial cost and disclosure obligations of LED patent litigation. However, because the dismissal is without prejudice, Signify cannot treat this as a final resolution. If Current Lighting refiles with a corrected jurisdictional basis — or if Signify continues to operate products covered by the 18 asserted patents — the dispute is likely to resurface in some form.
Pre-discovery win for SignifyFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Current Lighting Solutions, LLC | Company | LED lighting IP licensor — holder of 18 patents spanning drivers, optics, and power controlSearch in Eureka ↗ |
| Defendant | Signify Holding, B.V. | Company | Signify Holding B.V. and Signify North America Corp — global LED lighting manufacturer (Philips Hue parent)Search in Eureka ↗ |
| Plaintiff counsel | Aleksander Jerzy Goranin | Attorney | Counsel for Current Lighting Solutions, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Brianna M. Vinci | Attorney | Counsel for Current Lighting Solutions, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Seth S. Coburn | Attorney | Counsel for Current Lighting Solutions, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Timothy R. Shannon | Attorney | Counsel for Current Lighting Solutions, LLCSearch in Eureka ↗ |
| Defendant counsel | Adam Swain | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | Darlena Subashi | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | Joshua Weeks | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | Karlee N. Wroblewski | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | Katherine Rubschlager | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | M. Joseph Fernando | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | Philip C. Ducker | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Defendant counsel | Thomas William Davison | Attorney | Counsel for Signify Holding, B.V.Search in Eureka ↗ |
| Presiding judge | Judge George A. OToole | Chief Judge | Massachusetts District Court — Chief JudgeSearch in Eureka ↗ |
Stipulation of dismissal — official text
The court’s order grants Signify’s Motion to Dismiss in full and dismisses the case without prejudice. The without-prejudice designation is legally significant: it confirms the court did not adjudicate the validity, enforceability, or infringement of any of the 18 asserted patents. For Current Lighting, this preserves the right to refile on corrected grounds. For Signify, it avoids a merits ruling but does not extinguish the underlying IP risk. The reference to Dkt. No. 63’s Opinion and Order as the governing rationale suggests the dismissal rests on a reasoned legal basis — most likely jurisdictional — rather than a procedural technicality alone.
US7802902B2 and 17 Further Patents — LED Driver, Optics & Power Control Technology
The 18 patents asserted in this case collectively cover the core engineering layers of modern LED lighting systems. At the component level, patents such as US7802902B2 and US8629631B1 address LED driver circuits — the power electronics that regulate current to LEDs, including isolation, surge protection, and start-up behaviour at reduced input voltage. US7542257B2 and US7262559B2 address power factor correction, a regulatory and efficiency-critical requirement for commercial LED installations. The optical stack is covered by US8063577B2 (asymmetric collimators) and US8246200B2 (light mixing and redirection). Application filing dates range across multiple years, indicating a portfolio assembled over time rather than a single-generation technology claim.
For the LED lighting sector, this portfolio represents a potential licensing overlay across a wide range of commercial products — from industrial area lighting to architectural luminaires and retrofit drivers. Signify, as one of the world’s largest LED manufacturers, operates across precisely the product categories these patents address. The strategic significance for competitors and component suppliers is that these patents do not target a single product feature: they span the full design stack. Any company manufacturing or importing LED drivers, luminaires, or optical systems into the U.S. market should treat this portfolio as an active monitoring priority, given the without-prejudice dismissal leaves all claims in play.
Should You Run an FTO Against the 18 Current Lighting LED Patents?
If your company designs, manufactures, imports, or integrates LED lighting systems — particularly drivers, power factor correction circuits, luminaires, or optical assemblies — these 18 patents are directly relevant to your freedom-to-operate position. The without-prejudice dismissal in this case means Current Lighting retains full standing to assert any or all of these patents in a future action, against Signify or any other market participant. The breadth of the portfolio suggests a licensing strategy that could extend beyond this single dispute.
PatSnap Eureka’s FTO Search Agent allows R&D and IP teams to map their product specifications against the claim language of all 18 patents simultaneously — identifying which claims, if any, read on your specific driver topology, optical geometry, or control method. Claim monitoring alerts can be set to flag any continuation applications or reissue proceedings that extend the portfolio’s reach. Given the volume and technical diversity of these patents, automated claim-level analysis is significantly more efficient than manual review.
Run a freedom-to-operate analysis on US7802902B2 to assess your product’s exposure
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What This Case Signals for the LED Lighting IP Landscape
A 18-patent DJ action dismissed on procedural grounds is not a clean win for either side — the underlying IP tension remains live.
Declaratory Judgment Standing Is a Critical Threshold in LED IP Disputes
This dismissal reinforces that filing a DJ action requires demonstrating a concrete, immediate threat of infringement litigation. Companies facing patent assertion letters or licensing demands in the LED space should document the nature and severity of any threats before filing a DJ complaint — otherwise, motions to dismiss on jurisdictional grounds will follow.
18-Patent Portfolios Signal Licensing Strategy, Not Just Product Protection
The breadth of Current Lighting’s asserted portfolio — spanning drivers, optics, and luminaire design — is consistent with an IP licensing posture rather than a direct competitor dispute. R&D and procurement teams at LED manufacturers should audit their product lines against these patent families, particularly US7802902B2 and related driver-circuit patents, regardless of this case’s outcome.
Current v Signify — key questions answered
The court granted Signify’s Motion to Dismiss (Dkt. No. 22) and dismissed the case without prejudice per its Opinion and Order dated February 6, 2024. A without-prejudice dismissal in a declaratory judgment action typically indicates the court found a threshold defect — such as lack of subject-matter jurisdiction or standing — rather than ruling on the merits of the 18 asserted patents.
Current Lighting asserted 18 U.S. patents, including US7802902B2, US9119268B2, US7178941B2, US7262559B2, US8272756B1, US8629631B1, US7737643B2, US6972525B2, US8246200B2, US7542257B2, US7256554B2, US7866845B2, US8063577B2, US7654703B2, US7670038B2, US7358706B2, US9159521B1, and US7348604B2. These cover LED drivers, power factor correction, optical systems, luminaires, and lighting control methods.
A declaratory judgment action allows a party facing a credible threat of patent infringement suit to seek a court ruling first — typically on non-infringement or invalidity. Current Lighting filed as the plaintiff seeking such a ruling against Signify. The court’s dismissal suggests it found the required ‘actual controversy’ was not sufficiently established to confer jurisdiction.
Yes. A dismissal without prejudice does not bar refiling. Current Lighting may refile its declaratory judgment action if it can cure the defect identified by the court — most likely by demonstrating a concrete, ripe controversy with Signify. All 18 asserted patents remain active and enforceable unless separately challenged via IPR or district court proceedings.
Current Lighting Solutions was represented by Duane Morris, LLP, with attorneys Aleksander Goranin, Brianna Vinci, Seth Coburn, and Timothy Shannon on record. Signify was represented by Alston & Bird, LLP, with a team of eight attorneys including Adam Swain, Philip Ducker, and Thomas Davison, reflecting the scale of Signify’s defensive resources in this matter.
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