Abstract: An LED lamp comprises a lamp body and a colorized, translucent envelope detachably connected to the lamp body. The lamp body includes an LED module and the envelope covers the LED module. A color of the envelope is different from that of the light emitted by the LED module. The envelope changes the color of the light of the LED module when the light passes through the envelope to the outside.

Abstract: An alternating current LED illumination apparatus includes a heat dissipation plate, a plurality of LED chips arranged on the heat dissipation plate, a circuit layer, an encapsulation, two electrodes located on the heat dissipation plate and exposed out of the encapsulation, and a driving element. The LED chips are thermally connected with the heat dissipation plate, and at least two of the LED chips are connected in anti-parallel. The encapsulation covers the LED chips and at least part of the circuit layer. The driving element comprises a transformer and a switch. The transformer has an input terminal and an output terminal, the input terminal is configured to connect to an alternating current (AC) power source, and the output terminal is electrically connected with the electrodes by the switch.

Abstract: An alternating current light emitting diode (LED) illumination apparatus includes a heat dissipation plate, a plurality of LED chips, a circuit layer, an encapsulation, at least one electrode located on the heat dissipation plate, and a driving element. The LED chips are categorized into at least two LED chip groups connected in series, and each LED chip group comprises at least two LED chips connected in anti-parallel. The driving element comprises a transformer and a bilateral switch. One end of a first switch of the bilateral switch selectively connects to an output terminal of the transformer to output a selected driving voltage to the LED chips. One end of a second switch of the bilateral switch connects to the first switch and the other end of the second switch selectively connects to a LED chip group or all of the LED chips.

Abstract: A system includes a light source, a driving module and a processing unit. The light source includes a red, green and blue light emitting diodes. The driving module is electrically coupled to the red, green and blue light emitting diodes. The driving module is for controlling a driving current outputted to each of the red, green and blue light emitting diodes. The processing unit is communicatively coupled to the driving module. The processing unit receives a video signal containing display information which is inputted into a display screen and is to be displayed thereon. The processing unit analyzes the video signal and determines color temperature of the display information, and outputs a first controlling signal to the driving module for synchronously adjusting the color temperature of the light emitted from the light source to be substantially equal to that of the display information displayed on the display screen.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border. The first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border. An angle formed between any tangent plane of the second light emitting surface and a plane perpendicular to the optical axis is larger than an angle formed between any tangent plane of the first light emitting surface passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: An LED package structure includes a heat conductive plate defining a concave groove therein, an LED die received in the concave groove, an eutectic layer sandwiched between the heat conductive plate and the substrate, a transparent encapsulant encapsulating the LED die on the heat conductive plate. The heat conductive plate forms an electrode circuit layer on the heat conductive plate around the concave groove. The LED die forms electrodes electrically connected with the electrode circuit layer. An electrically insulating heat conduction grease filled around the substrate and the eutectic layer.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex, curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border. The first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border, and is a convex curved surface. An angle formed between any tangent plane of the second light emitting surface and a plane perpendicular to the optical axis is larger than an angle formed between any tangent plane of the first light emitting surface passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A wheel includes a rim and a tire. The rim includes a ring body defining a central axis, two flanges, and two piezoelectric rings. The flanges extend from the circumference of the ring body around the central axis. A first annular groove is defined in the circumference of each flange around the central axis. The piezoelectric rings are mounted in the respective first annular grooves and configured for producing electric power under pressure. The tire encloses the rim.

Abstract: A lens includes a light incident surface with a first central axis, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex, curved surface with a second central axis and is opposite to the light incident surface; the first light emitting surface comprises a first border. The first light emitting surface and the light incident surface cooperatively forming a convex lens portion. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border. The second light emitting surface is a rough surface for refracting light randomly. The distance between the first central axis and an inner side of the second light emitting surface is larger than the distance between the second central axis and the inner side of the second light emitting surface.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border. The first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border, and is a flat surface. An angle formed between the second light emitting surface and a plane perpendicular to the optical axis is larger than an angle formed between any tangent plane of the first light emitting surface passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A light concentrator assembly includes a first Fresnel lens, a second Fresnel lens, and a compound parabolic concentrator. The first Fresnel lens includes a first flat surface and an opposite first Fresnel lens surface. The second Fresnel lens includes a second flat surface and an opposite second Fresnel lens surface facing the first Fresnel lens surface. A first focal point of the first Fresnel lens and a second focal point of the second Fresnel lens coincide. The compound parabolic concentrator is located opposite the second flat surface. Light beams are converged by the first and second Fresnel lenses, and exit through the compound parabolic concentrator.

Abstract: A train rail includes an upper rail head, a lower rail head, a web, and at least one piezoelectric plate. The lower rail head is substantially parallel to the upper rail head. The web perpendicularly connects the upper rail head to the lower rail head. The at least one piezoelectric plate is positioned in the train rail and configured for producing electric power under pressure.

Abstract: A light concentration element assembly includes a Fresnel lens unit and a compound parabolic concentrator. The Fresnel lens unit includes a first Fresnel lens and a second Fresnel lens arranged parallel with each other, and configured for converging light transmitted therethrough. The compound parabolic concentrator includes at least two paraboloidal reflecting surfaces. The parabolic concentrator includes a light incident opening facing the Fresnel lens unit and a light output opening, and the paraboloidal reflecting surfaces are configured for reflecting the converged light from the Fresnel lens unit and outputting the reflected light through the light output opening. A solar cell apparatus using the light concentration element assembly is provided.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a Fresnel surface and opposite to the light incident surface. The first light emitting surface includes a number of concentric annular surfaces and a first border intersecting with some of the concentric annular surfaces. The first light emitting surface and the light incident surface cooperatively form a Fresnel lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border. An angle formed between any tangent plane of the second light emitting surface and a plane perpendicular to the optical axis is smaller than an angle formed between any tangent plane of the concentric annular surfaces passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The light incident surface is a concave surface and defines a receiving recess. The first light emitting surface is a convex curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border, and the first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface and adjacent to the first border. The longer the distance between a point of the second light emitting surface and the optical axis is, the longer the distance between the point and the light incident surface is.

Abstract: A ceiling lamp includes a bracket fixed to a ceiling, a frame attached to the bracket, a housing secured to the frame and a light source received in the housing. An axis extends through the frame and the bracket to pivotably attach the bracket with the frame. A plurality of apertures are defined in the bracket and an aperture is defined in the frame. A fastener can be selectively extended through one of the apertures in the bracket and into the aperture in the frame, to thereby position the housing at a selected one of different orientations in respect to the ceiling.

Abstract: An energy-saving illumination system includes a piezoelectric floor, a revolving door, an accumulator, a light source, and an electrical power sensing device. The piezoelectric floor contains piezoelectric material therein. The revolving door comprises a power generating device. The accumulator is electrically connected to the piezoelectric floor and the power generating device. The light source is electrically connected with the accumulator. The electrical power sensing device is configured to detect the quantity of electric charge in the accumulator; the power generating device of the revolving door charges the accumulator according to the detected result obtained from the electrical power sensing device in respect to the accumulator.

Abstract: An illumination apparatus comprises a housing, a LED base, and a heat sink, the housing having a light emitting surface and a heat dissipation surface opposite to the light emitting surface, the LED base including a circuit board and a plurality of LED chips, the heat dissipation surface adjacent to the circuit board, the light emitting surface of the LED chips toward the light emitting surface of the housing, and the heat sink including a plurality of heat dissipating tubes. The heat dissipating tubes are interlaced on the heat sink and the heights of the heat dissipating tube are different.

Abstract: A lighting module includes a plurality of lighting units arranged in a matrix. Positive electrodes of all the lighting units in the first column are connected to form a positive electrode of the lighting module, and negative electrodes of all the lighting units in the last column are connected to form a negative electrode of the lighting module. In any column of the lighting module, negative electrodes of all the lighting units in the odd rows are connected to positive electrodes of all the lighting units in even rows of next column, and negative electrodes of all the lighting units in the even rows are connected to positive electrodes of all the lighting units in odd rows of the next column.