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US 2013/0170245 A1Published application
Lighting device
AssigneeSamsung Electronics Co., Ltd.
InventorsJong Pa HONG, Gwan Su LEE, Jin Hyuk SONG, Joong Kon SON
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Abstract
A lighting device improves light distribution uniformity. When a light emitting diode (LED) package module is applied to a straight-tube fluorescent lamp, characteristics of a circular surface light source with the LED may be efficiently embodied by varying a refractive index of a light guide member based on positions of the light guide member.
Claims20
A lighting device comprising:
- a device main body;
- a light emitting diode (LED) which is provided in at least one end of an inside of the device main body;
- and
- a light guide member which is disposed between both ends of the device main body to uniformly distribute light emitted from the LED to the outside,
- wherein a refractive index of the light guide member is reduced in a direction away from the LED.
2 more elements
A lighting device comprising:
- a device main body;
- a light emitting diode (LED) which is provided in at least one end of an inside of the device main body;
- and
- a light guide member which is disposed between both ends of the device main body to uniformly distribute light emitted from the LED to the outside,
- wherein the device main body comprises:
- a fluorescent tube is configured to receive the LED and the light guide member inside and is provided with a phosphor for converting monochromatic light to white light;
- and
- a support member connected to the both ends of the fluorescent tube to support the light guide member.
5 more elements
A lighting device comprising:
- a light emitting diode (LED);
- a light guide member which is configured to uniformly distribute light;
- an elongated cylinder which is configured to comprise the LED and the light guide member;
- a first support member which is connected to one end of the elongated cylinder to support the light guide member;
- and
- a second support member which is connected to an opposite end of the elongated cylinder, as compared to the one end of the elongated cylinder,
- wherein the LED is disposed at the one end of the elongated cylinder.
4 more elements
Dependencies are inferred from the claim text.