1167results about How to "Improve reflective effect" patented technology

A light emitting apparatus 11 comprises: an aluminum nitride co-fired substrate 13; at least one light emitting device 15 mounted on a front surface of the co-fired substrate 13 through a flip-tip method; and a reflector 16 having an inclined surface 14 for reflecting a light emitted from the light emitting device 15 to a front side direction, the reflector 16 is bonded to a surface of the aluminum nitride co-fired substrate 13 so as to surround a circumference of the light emitting device 15. This configuration can simplify the process of manufacturing the apparatus and can provide light emitting apparatus that are excellent in heat radiation performance, allow a larger current to pass therethrough, and can have a significantly increased luminance with a high luminous efficiency.

The invention discloses a dual-reflecting layer gallium nitride-based inverted light-emitting diode (LED) with a distributed Bragg reflecting layer and a metal reflecting layer on lateral surfaces and a preparation method thereof. The preparation method comprises the following steps of: sequentially laminating and forming a buffer layer, a N-GaN layer, a multiple-quantum well layer and a P-GaN layer on a sapphire substrate; forming a transparent conducting layer on the P-GaN layer; covering the distributed Bragg reflecting layer on the lateral surfaces of an epitaxial layer and the transparent conducting layer; forming the metal reflecting layer on the distributed Bragg reflecting layer; forming a P electrode ohmic contact metal layer on an alloy metal reflecting layer; forming a N electrode ohmic contact metal layer on the exposed N-GaN layer; and bonding the P electrode ohmic contact metal layer and the N electrode ohmic contact metal layer with a heat radiating substrate through an alloy metal conducting layer and gold ball bonding points. A dual-reflection structure combining the distributed Bragg reflecting layer and the metal reflecting layer is arranged on the oblique lateral surface of an LED chip, thereby the excellent reflectivity of the reflecting layers is fully performed and the light-emitting efficiency of the LED is improved.

A light emitting diode comprising: a base substrate having a pair of electrodes; a reflection cup installed on the base substrate; a light emitting element arranged at a bottom of the reflection cup; and a resin sealant enclosing the light emitting element; wherein the light emitting element is electrically connected to the electrodes through an opening formed in the bottom of the reflection cup; wherein the reflection cup comprises a film body held in a cup shape and a metal film formed on a surface of the film body. This construction makes the control of light directivity easy and can produce light with a narrow directivity.

A transparent multi-layer lens construction to be worn as a sunglass lens, or a fashion lens, that reflects light in a diffuse manner. The multi-layer lens construction is, in part, a combination of surface form and surface texture combined with a reflective medium and an anti-reflective coating. The present invention offers vast improvements over previously disclosed lens constructions in that it provides for both improved reflectivity and improved optical quality.

A rubbing strip for a car has a body adapted to be secured to a side face of the car and having a receiving space with an open end; a transparent cap received in the open end of the receiving space of the body and having a reflection area oppositely formed relative to the open end of the body, the reflection area having multiple reflection faces formed to enhance the reflection effect; an illuminating assembly received in the receiving space of the body and located to face the reflection faces, the illuminating assembly being composed of multiple light emitting diodes. With such an arrangement, driving safety is enhanced.

A security element 2, 4 for embedding in or application to a security document in such a way that it is visually recognizable from both sides of the security document 1, is structured in a multilayer fashion and includes two interference elements I1, I2 with color shift effect, a metallic reflection layer R located in between as well as, optionally, diffraction structures 8. Depending on the disposition of the layers I1, R, I2 and the optionally present diffraction structures 8 on a transparent substrate S the color shift effect and / or the diffractive effects are perceptible from one or from both sides of the security element 2, 4. The security element is particularly suitable as a two-sided window thread 4 and as a label or transfer element 2 above a hole 3 in the security document 1.

Both a metallized cube corner retroreflective sheeting having a high measured daytime luminance factor and a method of manufacture thereof are provided. The sheeting is formed from a transparent planar sheet material including on one side a dense array of retroreflective cube corners having height H. The cube corners are canted edge-more-parallel by within about 1.5 degrees of 10n-9 degrees, where n is the index of refraction within the cube corners, and the cube corner faces are metallized by the application of a thin coating of reflective metal. The thickness of the sheet material between the bases of the cube corners and the opposite side of the sheeting is preferably between 1.75 H and 4.00 H. The resulting metallized, retroreflective sheet material may be mounted on a vehicle to increase its nighttime visibility through the ability of the sheet material to efficiently retroreflect a beam of light from a headlight or other source across a broad range of incident and orientation angles. Advantageously, the sheeting also reflects at least about 3.5% of normal and near normal light at angles within 5° of 45° obliquity, advantageously giving it a high measured daytime luminance factor as required by transportation regulations.