Abstract: An illumination system includes at least an LED module, and at least an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. In result, although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface, which is father to the illuminated are, can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system has a uniform illumination pattern.

Abstract: A power supply circuit for LED lamp includes a portable power source, an inductance energy storage module, a current sensing module, an on/off controlling module, a switch configured for turning on or turning off the inductance energy storage module via the on/off controlling module according to the current value sensed by the current sensing module, and a timer configured for controlling the on/off controlling module to regulate time span of turn off the inductance energy storage module so that the peak current of the inductance energy storage module has same value in each charging-discharging period thereof. The power supply circuit has constant output power regardless of how long the portable power supply is used and how much electric energy it has. Constant current is realized when the power supply circuit has a constant load.

Abstract: A lens includes an optical axis, a light source recess arranged through the optical axis, a reflection surface crossing through the optical axis, and a critical reflection surface which is arranged in a spaced relationship with the optical axis. The critical reflection surface is arranged between the light source recess and the reflection surface and receives the light from the light source recess and the reflection surface and reflects the light from the light source recess and the reflection surface towards the reflection surface. The emission light of the lens is light emitted forward of the light emitting surface which is reflected via the reflection surface and the critical reflection surface. Therefore, people cannot receive directly light emitted forward of the LED after it cross through the lens. In result, high luminance light from the LED is prevented from ripping into eyes, which achieve the aim of anti-glare.

Abstract: A lens, LED module and an illumination system includes an illuminated area; and at least an LED module for illuminating the illuminated area. The LED module includes an LED, and a lens mounted in the light path of the LED. The lens includes an optical axis, a light source recess arranged through the optical axis, a light emitting surface crossing through the optical axis, and a critical reflection surface arranged between the light source recess and the light emitting surface, wherein the light source recess is a rectangular hole in a section view which is vertical to the optical axis and has a center axis which overlaps with the optical axis, the light source recess has a wedge-shaped hole in a section view along the optical axis, the wedge-shaped hole has a top wall which crosses through the optical axis, the top wall has a convex surface.

Abstract: An undervoltage protection circuit for LED lamp includes a DC/DC converter, and a controlling circuit module. The controlling circuit module includes a signal collecting unit configured for collecting a signal, a signal comparing unit electrically connected to the signal collecting unit, and a signal processing unit electrically connected to the signal comparing unit. The signal comparing unit is configured for comparing a signal input from the signal collecting unit with a threshold voltage. The signal processing unit is configured for processing the signal output of the signal collecting unit to turn on or turn off the DC/DC converter. Whenever the voltage input is less than the threshold voltage which indicates an undervoltage condition, the controlling circuit module produces a high level and causes the DC/DC converter to not work as a result. Inversely, the controlling circuit module drops to a low level and the DC/DC converter begins to work.

Abstract: An illumination system includes an LED module and an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface intersecting with the first light emitting surface and being on same side with the first light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. Although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system has a uniform illumination pattern.

Abstract: A freezer lamp includes a strip lamp holder, a light module and a socket. The light module is disposed in the strip lamp holder. The socket is disposed on the end of the strip lamp holder and electrically connected to the light module. The strip lamp holder includes a main lateral surface and a mounting lateral surface. An installation groove is formed in the main lateral surface along length direction thereof. The light module is received into the installation groove. Two clamping grooves are formed in the mounting lateral surface along length direction thereof and are spaced apart from each other. The distance between the two clamping edges is exactly equal to that between the two clamping grooves. The clamping edge is cooperating with the corresponding buckle of clamping groove.

Abstract: A lamp with uniform illumination pattern is used for continually illuminating an illuminated area and includes at least one light module. The at least one light module includes two light sources respectively having different light intensity and arranged orderly. Two extension cords of two optical axes of the two light sources have one crossover point. Light emitted from the light source with less light intensity illuminates the illuminated area which is closer to the light module, while light emitted from the light source with greater light intensity illuminates the illuminated area which is farther to the light module. Light emitted from the light source, which is father to the illuminated are, can make up the intensity losses of attenuation since light emitted from the light source which is father to the illuminated area have greater light intensity. As a result, the lamp has uniform illumination pattern.

Abstract: An illumination system includes an LED module and an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface intersecting with the first light emitting surface and being on same side with the first light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. Although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system has a uniform illumination pattern.

Abstract: An illumination system includes at least an LED module, and at least an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface intersecting with the first light emitting surface and being on same side with the first light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. Although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system 100 have uniform illumination pattern.

Abstract: An illumination system includes at least an LED module, and at least an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. In result, although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface, which is father to the illuminated are, can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system has a uniform illumination pattern.