Home Light Therapy Device
Service Case 1
Home Light Therapy Device for Psoriasis and Vitiligo Treatment
Client Background：
A medical device manufacturer specializing in equipment for hospitals and dermatology clinics. Their products are primarily used for UVB phototherapy to treat localized psoriasis and vitiligo.
Traditional devices utilize lasers as the light source, delivering UVB through optical fibers to the targeted area.
High-power lasers are used for broad area irradiation, while lower-power lasers enable precise line-scanning treatment.
Project Motivation：
Psoriasis and vitiligo are common chronic skin conditions, particularly among Caucasians. While there is currently no cure, regular UVB phototherapy provides effective relief.
In the U.S., treatment protocols include
Patients with <3% affected skin area typically apply topical medications or receive occasional UVB treatment at clinics.
Patients with 3%–10% affected area require medication and frequent light therapy.
Patients with >10% affected area may require hospitalization.
This project aimed to develop a cost-effective, long-life UVB LED home therapy device for patients with <3% affected skin areas, enabling regular at-home treatment.
Pain Points：
High Laser Cost：Lasers have shorter lifespans compared to LEDs, requiring frequent replacement. The high cost makes them unsuitable for home therapy.
Regulatory Constraints：Existing equipment requires professional operation by licensed practitioners, limiting their applicability for home use.
Key Applications & Solutions：
High-Intensity LED Output
By separating the light source from control circuitry and defining the treatment area and projection distance via optical simulations, we achieved the desired intensity with fewer than 100 LEDs.
Compact Thermal Management
The system generates nearly 200W of heat. Traditional heatsinks and fans were too bulky.
Violumas designed a solution where the COB is mounted on a slim vapor chamber, transferring heat via a narrow half-inch conduit to a remote heatsink.
Affordable Pricing
LED counts were reduced from nearly 1,000 to under 100, making the final product accessible to consumers and eligible for insurance reimbursement.