Abstract: An air-cooled lamp bulb includes a central tube, a circuit board disposed inside the central tube, a circular light wall surrounding the central tube, a transparent dome surrounding a top end of the circular light wall and having a top central opening, and a first air passage formed between the central tube and the circular light wall. The circular light wall is formed by a plurality of light units arranged side by side. Each of the light units has a light source mounted adjacent a top end of the central tube. The transparent dome is arranged for modifying light emitted by the light sources. The first air passage allows air flow through the air-cooled lamp bulb.

Abstract: A LED lamp is disclosed which has a plurality of light unit, each of the light unit has at least one flat metal lead for heat dissipation and the lower part of the metal lead is mounted on a heat sink for a further heat dissipation.

Abstract: An air cooling LED lamp is disclosed. The lamp has air passages for natural air flow for cooling the lamp without using any electric fan to reduce electric energy consumption. The air passages still work for natural air cooling for the lamp when the lamp is configured either in a top down position or in a lateral position.

Abstract: A LED lamp is disclosed which is composed of a plurality of light unit, each of the light unit has metal its leads inserted into a heat sink for heat dissipation. A circuit board is optionally to use for electrically coupling the metal leads of each light unit to a control circuit for controlling the on/off of each of the light units.

Abstract: A laser scanning device and a control method thereof are provided. The method includes: providing a control signal to an oscillating reflective mirror of the device; setting a frequency of the control signal gradually decreased from a maximal-setting-value of a resonant frequency of the mirror; judging whether a light detector receives a laser light reflected by the mirror according to an edge signal of the detector; judging whether a pulse width of the edge signal is equal to a predetermined pulse width when the detector receives the laser light: (1) increasing the frequency of the control signal when the pulse width of the edge signal is greater than the predetermined pulse width, (2) decreasing the frequency of the control signal when the pulse width of the edge signal is less than the predetermined pulse width. The time and labor for measuring the scanning frequency of the mirror may be saved.

Abstract: An air cooling LED lamp is disclosed. The lamp has air passages for natural air flow for cooling the lamp without using any electric fan to reduce electric energy consumption. The air passages still work for natural air cooling for the lamp when the lamp is configured either in a top down position or in a lateral position.

Abstract: An air cooling LED lamp is disclosed. The lamp has air passages for natural air flow for cooling the lamp without using any electric fan to reduce electric energy consumption. The air passages still work for natural air cooling for the lamp when the lamp is configured either in a top down position or in a lateral position.

Abstract: An air cooling LED lamp is disclosed. The lamp has air passages for natural air flow for cooling the lamp without using any electric fan to reduce electric energy consumption. The air passages still work for natural air cooling for the lamp when the lamp is configured either in a top down position or in a lateral position.

Abstract: An LED device includes a substrate including a first and second light emitting modules, and first and second opposite sides. The first light emitting module includes a first conductive electrode located adjacent to the first side, a second conductive electrode located adjacent to the second side, and a first plurality of light emitting micro diodes electrically connected in the form of a plurality of serially connected bridge rectifiers between the first conductive electrode and the second conductive electrode. The second light emitting module includes a third conductive electrode located adjacent to the first side, a fourth conductive electrode adjacent to the second side, and a second plurality of light emitting micro diodes electrically connected in the form of a plurality of serially connected bridge rectifiers between the third conductive electrode and the fourth conductive electrode. The first, second, third, and fourth conductive electrodes are physically separated from each other.

Abstract: A LED lamp is disclosed which has a plurality of light unit, each of the light unit has at least one flat metal lead for heat dissipation and the lower part of the metal lead is mounted on a heat sink for a further heat dissipation.

Abstract: A LED lamp is disclosed which has a plurality of light unit, each of the light unit has at least one flat metal lead for heat dissipation and the lower part of the metal lead is mounted on a heat sink for a further heat dissipation.

Abstract: An arrangement of light emitting diodes including a first micro-die, a second micro-die, a first bridge, a second bridge and a substrate supporting the first micro-die and the second micro die. The first micro-die includes a first edge having a first end and a second end, a second edge opposite and not parallel to the first edge, a first connecting portion near the first end, and a second connecting portion near the second end.

Abstract: A LED lamp is disclosed which has a plurality of light unit, each of the light unit has at least one flat metal lead for heat dissipation and the lower part of the metal lead is mounted on a heat sink for a further heat dissipation.

Abstract: The invention provides a projector, a color wheel protection circuit, and a color wheel protection method. The projector includes a color wheel, a light source, a controller, and a protection circuit. The light source is controlled by a light source control signal to provide an illumination beam to the color wheel. The controller is used for providing the light source control signal to the light source. The protection circuit includes a resetting signal generator and a logic operator. The resetting signal generator is used for generating a resetting trigger signal according to the rotation speed of the color wheel, and generating a resetting output signal according to the resetting trigger signal. The logic operator is used for receiving the light source control signal and the resetting output signal, and resetting the light source control signal according to the resetting output signal.

Abstract: A LED lamp is disclosed which has a plurality of light unit, each of the light unit has at least one flat metal lead for heat dissipation and the lower part of the metal lead is mounted on a heat sink for a further heat dissipation.

Abstract: An AC LED device and method for fabricating the same are disclosed. An exemplary embodiment of the AC LED device includes at least two separate AC LED unit chips, wherein each of the AC LED unit chip includes a substrate having a first light emitting module and a second light emitting module. Each of the first and second light emitting modules includes a plurality of light emitting micro diodes connected between a first conductive electrode and a second conductive electrode, wherein the amount of light emitting micro diodes emitting light during a positive half cycle of an AC charge is equal to that during a negative half cycle of an AC charge. A plurality of conductive wires is respectively and electrically connected to the separate AC LED unit chips without passive devices.

Abstract: A panorama lamp with 360 degree peripheral illumination with reference to an axis of the lamp is disclosed. Each of the light units mounted on a heat sink has a light chip facing outward from the lamp. Either a protection cap or a circular wall lens can be optionally adopted to cap the top of the lamp. The protection cap provides protection to the chips of the lamp from being damaged. The circular wall lens modifies the beam profile of the lamp to meet various market requests.

Abstract: A lamp apparatus include a lamp body, at least an alternating current light-emitting diode and a plug. The alternating current light-emitting diode is disposed on a lamp body. The plug is electrically connected to the alternating current light-emitting diode. In lamp apparatuses utilizing AC LED, heat generated thereby is almost concentrated on chips. Compared with conventional lamp apparatuses utilizing DC LEDs, heat generated thereby is distributed on chips and outer rectifier. In lamp apparatuses utilizing AC LEDs, heat generated thereby is almost concentrated on chips because AC LEDs operate directly with AC electric power, omitting a rectifier and preventing power loss during operation of power rectification. Therefore, the heat accumulated on the chips of the AC LEDs is enough to be used to evaporate essential oil. In another embodiment, the invention utilizes low-resistance pure water surrounding the AC LED to dissipate its heat.

Abstract: A LED tube having double heat sinks is disclosed. One of the embodiment shows a first plurality of light unit is fixed onto the top heat sink, and a second plurality of light unit is fixed onto the bottom heat sink, while with the light chips configured in between the two heat sinks for light emission to the ambient.

Abstract: A lamp apparatus include a lamp body, at least an alternating current light-emitting diode and a plug. The alternating current light-emitting diode is disposed on a lamp body. The plug is electrically connected to the alternating current light-emitting diode. In lamp apparatuses utilizing AC LED, heat generated thereby is almost concentrated on chips. Compared with conventional lamp apparatuses utilizing DC LEDs, heat generated thereby is distributed on chips and outer rectifier. In lamp apparatuses utilizing AC LEDs, heat generated thereby is almost concentrated on chips because AC LEDs operate directly with AC electric power, omitting a rectifier and preventing power loss during operation of power rectification. Therefore, the heat accumulated on the chips of the AC LEDs is enough to be used to evaporate essential oil. In another embodiment, the invention utilizes low-resistance pure water surrounding the AC LED to dissipate its heat.