Abstract: A light guide plate includes a light incident surface, a side surface opposite to the light incident surface, and a light emitting surface connecting to the light incident surface and the side surface. The light emitting surface has a first portion adjacent to the light incident surface and a second portion adjacent to the side surface. The first portion defines a number of first micro recesses. The second portion defines a number of second micro recesses. In a plane perpendicular to the light emitting surface and the side surface, a cross section of each second micro recess is a portion of an ellipse. A major axis of the ellipse is inclined towards the light incident surface. A maximum depth of each second micro recess is greater than a maximum depth of each first micro recess.

Abstract: A modular luminaire which uses LED light sources. The basic frame comprises two end pieces compressed together by through bolts. At least one elongated heat sink is compressed between the end pieces. Each heat sink may bear a plurality of LEDs mounted on a printed circuit board which may have an integral metallic backplate, and is installed on one of the heat sinks with a layer of heat conductive grease therebetween. The heat sinks have fins projecting in three directions, the fourth direction being accounted for by the LEDs, and are rotatable about their longitudinal axes to adjust direction of light propagation. The heat sinks are arrayed in an arc, so that the outside heat sinks shield observers from direct glare from opposed heat sinks. Heat sinks may be extruded to form cooling fins and slots which may receive fasteners such as screws.

Abstract: Systems and methods permit use of efficient solid state emitters for broad spectrum continuous spectrum lighting defined by illumination data. The illumination data, which can be sold as a commercial product, can be recorded or authored and include spectral, temporal, and spatial information. Intensities of individual emitters such as LEDs can be controlled through a combination of pulse width modulation (PWM) and amplitude modulation (AM) of drive currents. The combination of PWM and AM permits fine tuning of the spectrum of emissions and creation of free space optical data channels.

Abstract: A medical light-source device for securing a long illumination time required for operations in the medical field, has an LED illumination section including an LED element; a holder to put the LED illumination section on a head of the operator; a battery power supply section that supplies power to the LED illumination section; a charger having an AC adaptor capable of being connected to a commercial power supply for charging the battery power supply section; and a battery holding belt to put the battery power supply section and the charger on the body of the operator. The battery holding belt has a switch section to switch on/off the LED illumination section and to adjust intensity of illumination of the LED element; and a control section to control a constant current, which is associated with the intensity of illumination, supplied to the LED illumination section.

Abstract: A lens includes a bottom face, a light incident face defined in the bottom face, a plurality of light reflective faces connecting the light incident face with the bottom face, and a light emerging face opposite to the light incident face. The light incident face includes a first face and a plurality of second faces alternating with the light reflective faces. The light reflective faces are flat faces parallel to an optical axis of the lens. An LED unit using the lens is also disclosed.

Abstract: A light emitting module includes a circuit board, light emitting elements disposed on the circuit board, each light emitting element including light emitting diode chips and a wavelength conversion layer coated on the light emitting diode chips, and a lens disposed on the light emitting elements and configured to diffuse light emitted from the light emitting elements. The lens includes a concave part having a light incident surface and an upper surface through which the light incident on the lens is emitted, and at least one of the light incident surface and the upper surface includes sections disposed at least 15° from a central axis and sequentially connected in a first direction.

Abstract: A backlight unit includes a light source unit having a light source configured to emit a first light, a quantum dot sheet configured to emit a second light having a different color from the first light, a light guide plate configured to guide a light exiting from the light source unit or the quantum dot sheet, and an optical member including a prism sheet and configured to control the light exiting from the light guide plate. The quantum dot sheet includes a polymer resin and a plurality of first and second quantum dots, which are dispersed in the polymer resin. The second light is a white light obtained by mixing a red light, green light, and a blue light, and the second light has a concordance rate with an Adobe RGB color space which is no less than by about 99.9%.

Abstract: A semiconductor-based light source device for an endoscope that provides for an even power distribution and/or color distribution of light. The semiconductor-based light source device includes a plurality of semiconductor light sources and a plurality of fiber bundles, in which the respective fiber bundles are each segregated into a plurality of fiber sub-bundles for directing substantially the same amount of illumination from a respective semiconductor light source to each of a corresponding plurality of illumination windows disposed at a distal end of the endoscope. By providing such a semiconductor-based light source device, in which the respective semiconductor light sources are operative to adjust the intensity and/or color or wavelength of the light emitted by the respective semiconductor light sources, a desired color temperature and/or color balance for illumination of tissue and/or other matter under examination by the endoscope can be achieved.

Abstract: A light fixture including a support structure and a plurality of LEDs coupled to the structure and spaced apart along at least a portion of a length of the structure. The light fixture further includes a power pack, the power pack including a driver configured to be electrically coupled to the plurality of LEDs, power input wiring that is configured to receive power for the light fixture, and a cover provided substantially over the driver and the power input wiring. A modular power input connector is accessible without removing the cover, wherein the modular power input connector is coupled to the power input wiring, and wherein the modular power input connector is configured to accept a power cord.

Abstract: The light fixture includes a frame configured to define a channel, and a substantially flat light emitting diode (LED) panel disposed within the frame. Power circuitry is disposed within the first channel, the power circuitry being configured to electrically couple the substantially flat LED panel to an external AC power supply. The power circuitry is sized to be positioned within the first channel and has a length and a width, the length-to-width ratio being at least 5 to 1, and optionally at least 10 to 1. The power circuitry is configured to convert an AC input into a DC output suitable for powering the substantially flat light emitting diode (LED) panel. The substantially flat light emitting diode (LED) panel includes an optically transmissive panel, and an array of LEDs disposed adjacent to an edge of the optically transmissive panel and disposed adjacent at least one edge of the frame.

Abstract: A lens for distribution of light from a light emitter having an emitter axis. The lens includes an outer surface and a total internal reflection (TIR) surface positioned outwardly of and around the emitter such that light received by the TIR surface is totally internally reflected toward the outer surface. The TIR surface has at least one recessed region extending away from the light emitter, thereby to increase amount of TIR and facilitate lateral diffusion of highest-intensity light in the middle of the light distribution. The lens may further include a base surface adjacent the emitter and an inner surface defining an inner cavity about the emitter axis. In such embodiments, the TIR is positioned and configured for total internal reflection of light received from the inner surface.

Abstract: In accordance with certain embodiments, lighting systems include one or more lightsheets each including a plurality of strings of light-emitting elements, control elements, and power conductors for supplying power to the light-emitting elements and control elements.

Abstract: An improved flea comb apparatus can be used to remove fleas from animals such as cats, dogs, and the like and advantageously includes a retractable flea comb and lights that are automatically illuminated when the flea comb is in a deployed condition. The lights attract fleas and aid in their removal by providing an intensity of light at the undercoat region of an animal that has not previously been conveniently provided. The lights also assist the user in identifying fleas during combing of the animal.

Abstract: A lens for an illumination device, in a cross section, includes a bottom surface, and a first side surface and a second side surface which respectively extend inclinedly upwards from two sides of the bottom surface and converge. The bottom surface includes a supporting surface and an incident surface, the incident surface defining an accommodation cavity for accommodating a light source of the illumination device. The first side surface includes a first emergent surface and a first reflective surface, the second side surface includes a second emergent surface. A first part of light from the incident surface emerges from the first emergent surface, and a second part of light from the incident surface at least emerges from the second emergent surface after reflected by the first reflective surface, such that the emergent light is distributed at an angle of 360°.

Abstract: A module array includes a light emitting device module. The light emitting device module includes a light source unit, a body provided at one surface thereof with a seat on which the light source unit is seated, a plurality of radiation fins disposed on the other surface of the body opposite to one surface of the body, and an air hole perforated in the body from the seat to the radiation fins for the flow of air.

Abstract: A lighting guide is disclosed for a lighting apparatus, which comprises an elongate and substantially transparent member having opposed ends. A longitudinal portion of an outer surface of the member is linearly recessed symmetrically about a transversal main axis of the member. A transversal distance of the recessed portion relative to a longitudinal portion of the outer surface opposed to the recessed portion increases progressively in either direction away from the transversal main axis of the member. A lighting apparatus is also disclosed, which comprises the lighting guide and two light sources located adjacent respective and opposed ends of the member.

Abstract: A backlight device 12 includes LEDs 17, a light guide plate 16, a chassis 14, and a light source mounting member 30. The light guide plate 16 included a front surface configured as a light exit surface 16a, a rear surface configured as an opposite surface 16c, and two side surfaces configured as light entrance surface 16b. The light guide plate 16 is arranged such that the light entrance surface 16b are opposite light emitting surfaces 17a of the LEDs 17 and configured to guide light from the LEDs 17 toward the light exit surface 16a. The chassis 14 includes a plate-like portion 14a arranged on an opposite surface 16c side of the light guide plate 16. The light source mounting member 30 on which the LEDs 17 are mounted includes at least one bottom plate 30a including a front surface and a rear surface. The front surface is in surface-contact with a rear surface of the plate-like portion 14a. At least one portion of the rear plate surface is exposed to an external side.

Abstract: A lamp unit, comprises a substrate on which a luminous element is mounted, a housing having an opening in which the luminous element is arranged, and a lens arranged at a light emitting side of the luminous element, wherein the housing is sandwiched and fixed between the substrate and the lens; and wherein the lens is provided with a first wall portion protruding from a side of the lens facing the housing and surrounding the opening of the housing, and the housing is provided with a second wall portion protruding from a side of the housing facing the substrate and surrounding the opening of the housing.

Abstract: A display device includes a backlight module and a display panel. A spectrum of the backlight module has three peaks, so that the backlight module can emit a white light, wherein a full width at half maximum (FWHM) of the peak in a range of a green wavelength is less than or equal to 55 nm. The display panel is disposed on a light emitting surface of the backlight module, and includes a pixel array and a color filter array disposed correspondingly to the pixel array. The color filter array includes a red, a green and a blue filter patterns. The green filter pattern and the backlight module satisfy the following relations: ? 553 562 ? ? BL ? ( ? ) × CF Green ? ( ? ) × ?? ? 4 ? 580 600 ? ? BL ? ( ? ) × CF Green ? ( ? ) × ?? ? 2 ? 601 650 ? ? BL ? ( ? ) × CF Green ? ( ? ) × ?? ? 1.2 . Besides, a x coordinate of green light of CIE is less than 0.22 and a y coordinate of green light of CIE is greater than 0.70.

Abstract: A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis. The lens includes an outer surface, a reflecting inner surface and a reflecting back surface. The reflecting inner surface is positioned and configured for total internal reflection (TIR) of received light toward the lens outer surface. The reflecting back surface is positioned and configured for total internal reflection (TIR) of received light toward the preferential side.