US 7,841,743 B2Granted

Lighting apparatus

AssigneeFoxsemicon Integrated Technology, Inc.

InventorsMeng-Hua Wang, Hung-Kuang Hsu

Life of this patent

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Abstract

A lighting apparatus includes a reflector, a light source, and a lens unit. The reflector has an open side, and a reflective surface that extends from a periphery of the open side and that defines a compartment. The light source is disposed in the compartment and emits light toward the reflective surface. The reflective surface reflects the light from the light source towards the open side. The lens unit is disposed to close the open side and permits passage of the light reflected by the reflective surface therethrough. The lens unit includes a central lens portion, and first and second side lens portions respectively disposed on two sides of the central lens portion. The central lens portion and the first and second side lens portions are Fresnel lenses, and are configured to redirect the light passing therethrough to result in rectangularly-distributed illumination outwardly of the lighting apparatus.

Claims12

Dependent claims

A lighting apparatus comprising:

a reflector having an open side that defines an axis of symmetry, and a reflective surface that extends from a periphery of said open side and that defines a compartment;
a light source disposed in said compartment and operable to emit light toward said reflective surface, said reflective surface reflecting the light from said light source towards said open side;
and
a lens unit that is disposed to close said open side and that permits passage of the light reflected by said reflective surface therethrough, said lens unit including a central lens portion, and first and second side lens portions respectively disposed on two sides of said central lens portion that are on opposite sides of said axis of symmetry,
wherein said central lens portion and said first and second side lens portions are Fresnel lenses, configured to redirect the reflected light from the reflective surface of the reflector, and wherein the lighting apparatus provides rectangularly-distributed illumination outwardly.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/074,563Filed 4 Mar 2008
Priority: TW 96140360 A26 Oct 2007
Published: US 2009/0109685 A130 Apr 2009
Granted: 30 Nov 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F21V 13/04
Combinations of only two kinds of elements: the elements being reflectors and refractors
F21V 5/045
Of lens shape: the lens having discontinuous faces, e.g. Fresnel lenses
F21Y 2115/10
Light-generating elements of semiconductor light sources: light-emitting diodes [LED]
F21V
Functional features or details of lighting devices or systems thereof