An LED luminaire comprising LED arrays, a full-wave rectifier coupled to AC mains, a power switching converter, and an LED driving circuit coupled to the power switching converter is used to replace a conventional luminaire with a severe temporal light artifact. The power switching converter is configured to convert a first DC voltage from the full-wave rectifier into a second DC voltage with a low-frequency ripple associated with the AC mains. By adapting switching frequencies to compensate the low-frequency ripple of the second DC voltage, the LED driving circuit can regulate the second DC voltage into a third DC voltage with a ripple-reduced LED driving current to drive the LED arrays with a flicker-reduced light emission to protect users of the LED luminaire from possible health hazards such as seizures, headaches, eyestrain, reduced visual performance, migraines, etc.

Aleddra Inc.

ALEDDRA INC.

Solid-state lighting with a reduced temporal light artifact

A personal media viewing device has a frame that adjustably holds a pair of lenses. The frame has tracks along a bottom inside portion that guides the lenses as a lens adjustment knob is turned. The adjustment knob is attached to a translating screw shaft that has opposingly threaded portions that interact with a left and right traveling nut attached to each lens and moves each lens in an opposite direction. An elastic strap is used to removably hold a personal media device to the frame and a head attachment portion is provided to allow a user to operate the personal media viewing device hands free. The adjustment knob allows a user to adjust the lenses to an off-axis position selected to reduce eyestrain, headaches and other non-desirable effects associated with viewing a device in front of the user's eyes.

asthenopia/headache

Solid-state lighting with a reduced temporal light artifact

Personal media viewing device

Baza e të dhënave më e plotë e bimëve medicinale e mbështetur nga shkenca