Smartphone-Driven Low-Power Light-Emitting Device

Area of Science:

• Biomedical Engineering
• Alternative Medicine
• Photomedicine

Background:

• Low-level light (laser) therapy (LLLT) research has predominantly used lasers.
• Recent advancements show increased interest in using light-emitting diodes (LEDs) for LLLT.
• Color therapy is an alternative medicine modality with growing interest.

Purpose of the Study:

• To develop a smartphone-driven, low-power LED device for color therapy.
• To enable precise control over light intensity and emission time.
• To offer a portable and accessible alternative medicine tool.

Main Methods:

• A smartphone application controls a device with a control unit and color probe via USB On-The-Go (OTG).
• Pulse width modulation (PWM) is used for intensity control without feedback.
• A calibration process measures intensity at 10% PWM intervals for linear correction.

Main Results:

• The device successfully controls illumination intensity and emission time.
• Linear calibration of PWM values ensures accurate light intensity output.
• The developed device demonstrates potential for varied therapeutic applications.

Conclusions:

• A novel smartphone-controlled LED device for color therapy has been successfully developed.
• The device offers adjustable light intensity through calibrated PWM, enhancing its therapeutic utility.
• This technology presents a promising, accessible tool for alternative medicine and photomedicine.