30 results about "Light emitting device" patented technology

A light emitting device has: a light emitting element; a conducting portion to supply power to the light emitting element; an element housing portion that houses the light emitting element therein; and a sealing material that seals the light emitting element housed in the element housing portion. The sealing material contains a transparent resin material and a transparent filler with a thermal expansion coefficient smaller than the transparent resin material, and the transparent filler has a refractive index nearly equal to the transparent resin material.

A system for illuminating a wheel on a vehicle, the wheel having a concave area adapted for mounting around a wheel hub attached to stationary structure on the vehicle, the vehicle having an electrical power source. The system includes a contact ring that includes a circular backing ring of an electrically insulating material and a layer of electrically conductive material over the backing ring. The contact ring is flexibly supported from the concave area of the wheel where a contact brush mounted from the stationary structure of the vehicle makes contact with the layer of electrically conductive material on the contact ring. At least one electrical light emitting device is electrically connected to the layer of electrically conductive material on the contact ring, so that electrical power from the power source reaches the light emitting device through the contact brush and through the contact ring.

The lighting device (1) includes an LED chip (10), a mounting substrate (20) mounting thereto the LED chip, an encapsulation member (50) made of an encapsulating resin material for encapsulation of the LED chip, and a lens (60) made of a transparent resin material. The lens (60) is provided in its bottom with a recess (40) and is secured to the mounting substrate (20) with the encapsulation member (50) disposed within the recess (40). The encapsulation member (50) is confined within the recess of the lens of the transparent resin material, which minimizes a difference in the coefficient of linear expansion between the encapsulation member and the surroundings for restraining occurrence of voids in the encapsulation member at a low temperature.

In a light-emitting apparatus, a face of a substrate on which a light-emitting device is formed is an uneven surface having a plurality of asperities. The mean spacing Sm of adjacent asperities or the mean spacing S of peaks of adjacent projections of the asperities is no less than three times the longest wavelength of light generated by a light-emitting layer and no more than two hundred times the longest wavelength. The arithmetic mean slope Δa of the uneven surface is in a range between 4° and 30°, inclusive. Therefore, the apparatus emits substantially a greater amount of light from a light extraction side and has less brightness unevenness than a light-emitting apparatus with no uneven surface.

Disclosed is a light-emitting device, comprising: a first multi-quantum well structure comprising a plurality of first well layers and a first barrier layer stacked alternately, wherein the energy gap of the first barrier layer is larger than that of any one of the first well layers; a second multi-quantum well structure comprising a plurality of second well layers and a second barrier layer stacked alternately, wherein the energy gap of the second barrier layer is larger than that of any one of the second well layers; and a third barrier layer disposed between the first multi-quantum well structure and the second multi-quantum well structure, and the third barrier layer connected with the first well layer and the second well layer, wherein the energy gap of the third barrier layer is larger than that of any one of the first well layers and the second well layers, and the thickness of the third barrier layer is larger than that of any one of the first barrier layer and the second barrier layer.

The invention relates to a quantum dot molecular light emitting device, which sequentially comprises the following structures from bottom to top: a lower gold germanium nickel metal electrode layer (1), a gallium arsenic substrate (2), a gallium arsenic buffer layer (3), a n-type aluminum gallium arsenic lower cladding layer (4), a gallium arsenic lower waveguide limiting layer (5), a quantum dotmolecular active area, a gallium arsenic upper waveguide limiting layer (9), a p-type aluminum gallium arsenic upper cladding layer (10), a p-type gallium arsenic ohmic contact layer (11), a dioxide silicon insulating layer (12) and an upper titanium platinum gold metal electrode layer (13), wherein the quantum dot molecular active area comprises n quantum dot molecular layers each of which comprises quantum dot molecules (6), a stress buffer layer (7) and an isolated layer (8), and n is a natural number not less than 1. According to the invention, the laterally coupled quantum dot molecules are utilized to manufacture an active area structure and corresponding light emitting devices, thereby widening the applicable scope of quantum dot and improving the performance of low dimension semiconductor device.

The invention discloses haemostatic forceps for liver and gall surgery. The haemostatic forceps comprise an upper forceps body and a lower forceps body which are connected through a rotating pin. A ring is fixedly connected to the rear end of the upper forceps body, and a ring is fixedly connected to the rear end of the lower forceps body. Transparent plastic bodies are welded to the front end and the rear end of the upper forceps body respectively, and transparent plastic bodies are welded to the front end and the rear end of the lower forceps body respectively. An LED light-emitting device is arranged in each transparent plastic body. An automatic connecting device is arranged on the lower side of the upper forceps body, and an automatic connecting device is arranged on the upper side of the lower forceps body. A chargeable thermal probe is fixedly connected to the lower portion of the front end of the upper forceps body. The brightness of the LED light-emitting devices in the transparent plastic bodies is sufficient, and heat is little; being installed in the integrated transparent plastic bodies of the upper forceps body and the lower forceps body, the LED light-emitting devices are more convenient to use; the chargeable thermal probe is simpler in structure, and can be charged when out of power, a temperature adjusting device installed in the probe can adjust the temperature of the probe according to needs, and therefore the haemostatic effect is better; meanwhile, due to electromagnetic upper and lower connecting bodies, the upper forceps body and the lower forceps body can vise blood vessels more tightly, and relieving is also convenient.

The invention relates to an interactive backpack comprising a backpack body, wherein the backpack body comprises the form of a character, as well as comprising: lighting means linked to the form of the character, sound means, control means linked to the lighting means and sound means, wherein the control means are configured for the synchronized and coordinated activation of the lighting and sound means; wherein the backpack further comprises an actuator for the control means, with the actuator being disposed in an attachment which is joined to the backpack body.