Sony Patents a Skin-Worn Light Therapy Patch That Lets Your Skin Breathe
Sony is working on a flexible light-emitting patch you wear directly on your skin, designed to deliver light therapy without trapping heat or moisture underneath it.
What Sony's wearable light patch actually does
Imagine a thin, bendy sticker that glows. You press it against your skin, and it delivers light directly to the surface, the kind of light used in treatments for pain relief, skin conditions, or wound healing. That's the basic idea behind this Sony patent.
The clever part is the design of the light-spreading layer. Instead of being a solid sheet that would seal against your skin like a bandage and cause sweating or irritation, it has a pattern of small holes punched through it. Those holes let air and moisture pass through, so your skin can breathe even while the device is working.
The whole thing is flexible, so it can conform to curved body parts, like a shoulder, a knee, or a wrist, rather than sitting flat and stiff like a rigid panel. Sony's patent covers the core structure: a base layer, a light source, and that perforated, bendable light guide.
… a flexible light guide plate that is joined to the substrate, guides the light emitted by the light emitting unit, and has a plurality of through holes.
Translation: A bendable layer spreads the light across the skin while featuring tiny holes so the skin can breathe.
How the flexible light guide and through holes work together
The device has three main components working together:
- Substrate: The base layer that holds everything together and provides structural support.
- Light emitting unit: The actual light source, likely LEDs, mounted on that substrate.
- Flexible light guide plate: A bendable panel that spreads and directs the light from the source across a larger area, with multiple holes punched through it.
A light guide plate works by capturing light from a small source at its edge or back, then distributing it evenly across its face using internal reflections, similar to how the backlight behind a laptop screen spreads a few LED points into a uniform glow. Making that plate flexible means it can bend to match the contours of a human body.
The through holes are the distinguishing design choice here. A solid flexible panel pressed against skin would block airflow, potentially causing discomfort or skin irritation during extended wear. The perforations solve that by creating ventilation channels while still allowing the light to reach the skin between the holes.
The patent's independent claim is intentionally broad, covering any device built on this three-part structure. The specific application, whether pain relief, photobiomodulation (light-triggered biological responses in tissue), or cosmetic treatment, is not locked down in the filing itself.
A living body attachment-type light emission device according to an embodiment of the present disclosure includes: a substrate; a light emitting unit that is provided on the substrate and emits light; and a flexible light guide plate that is joined to the substrate, guides the light emitted by the light emitting unit, and has a plurality of through holes.
Translation: The wearable patch combines a lighted base with a perforated flexible layer to shine light directly onto the body.
What this means for wearable light therapy devices
Wearable light therapy is a growing category. Devices that deliver red or near-infrared light to skin and tissue are already sold for pain management, wound healing, and skin rejuvenation, but most are rigid panels you hold near your body or press against it briefly. A flexible, breathable patch that stays on comfortably opens the door to continuous, hands-free treatment during everyday activity.
For Sony, this fits a pattern of the company extending its hardware expertise into health and wellness wearables. The patent itself is minimal in scope, just three components, which gives Sony wide latitude if it pursues this in a product. Whether that product ever ships is a separate question, but the filing signals that Sony is at least thinking seriously about this space.
This is a compact, foundational patent covering the basics of a wearable light therapy patch. The through-hole ventilation idea is a practical and sensible engineering choice, but the claim is broad enough that it reads more like a land-grab on the concept than a detailed product blueprint. Worth watching if Sony follows up with more specific filings, but not much to get excited about on its own.
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The drawings
19 drawing sheets from US 2026/0224910 A1 · click any drawing to enlarge
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