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US 8,616,727 B2Granted
Bulb-type LED lamp having a widened luminous distribution via a fastened waveguide
AssigneeToshiba Lighting & Technology Corporation
InventorsTakeshi Hisayasu, Daigo Suzuki
Life of this patent
Estimating the term…
Abstract
According to one embodiment, an LED lamp includes an LED module and a light guide. The LED module includes a plurality of LEDs annularly arranged and mounted on a front surface of a board, and an opening provided in the board at an inside surrounded by the LEDs. The light guide is engaged and fastened to the opening from the front surface side of the board. The light guide guides part of light emitted by the LEDs, and emits the light guided from the front surface side to a rear surface side over an outer edge part of the board.
Claims9
An LED lamp comprising:
- an LED module including a board and a plurality of LEDs annularly arranged and mounted on a front surface of the board, the board having an opening at an area of the board surrounded by the LEDs;
- and
- a light guide including a base portion and a light leading portion integrated with the base portion and extending from the base portion toward an outer periphery of the board and in a direction away from the front surface of the board,
- the light guide being engaged with and fastened to the front surface side of the board at the opening, and being configured to guide a part of light emitted by the LEDs through the light leading portion and a part of the light emitted by the LEDs over an outer edge of the board.
1 more element
Dependencies are inferred from the claim text.