TSMC Solid State Lighting Ltd.

Epistar Corporation

Hao-Yu Yang

Ching-Yi Chen

Hsin-Hung Chen

Yu-Sheng Tang

Tzu-Wen Shih

Hsiao-Wen Lee

Chung Yu Wang

Sheng-Shin Guo

Chi Xiang Tseng

Shang-Yu Tsai

Hao-Wei Ku

Tien-Ming Lin

Tien-Min Lin

A lens is formed over one or more light-emitting devices disposed over a substrate. The lens includes a trench that circumferentially surrounds the one or more light-emitting devices. The trench is filled with a phosphor-containing material.

Batwing LED with remote phosphor configuration

An optical emitter is fabricated by bonding a Light-Emitting Diode (LED) die to a package wafer, electrically connecting the LED die and the package wafer, forming a phosphor coating over the LED die on the package wafer, molding a lens over the LED die on the package wafer, molding a reflector on the package wafer, and dicing the wafer into at least one optical emitter.

Wafer level reflector for LED packaging

A batwing beam is produced from an optical emitter having a primary LED lens over a number of LED dies on a package substrate. The LED lens includes a batwing surface formed by rotating a parabolic arc about an end of the parabolic arc over a center of the optical emitter. A center of each of the LED dies is mounted to the package substrate about the focus of a parabola whose arc forms the batwing surface, for example, between about 0.5 to 1.5 of a focal distance from the vertex of the parabola. The batwing surface reflects light from the number of LED dies through total internal reflection (TIR) or through a reflectivity gel coating.

Bat-wing lens design with multi-die

A lighting apparatus includes a substrate. One or more light-emitting devices are disposed over the substrate. A lens is molded over the substrate and over the one or more light-emitting devices. A recess is disposed in the lens. The recess circumferentially surrounds the one or more light-emitting devices in a top view. The recess is at least partially filled with phosphor particles.

A radiation device is disclosed. The device includes a light cavity including a top surface, a bottom surface, and side walls. A light source array including at least one light source is formed on a first side wall. The device also includes a reflective coating formed on at least the bottom surface. The top surface allows light transmission and includes a light conversion layer.

Light cavity that improves light output uniformity

A semiconductor structure includes a module with a plurality of die regions, a plurality of light-emitting devices disposed upon the substrate so that each of the die regions includes one of the light-emitting devices, and a lens board over the module and adhered to the substrate with glue. The lens board includes a plurality of microlenses each corresponding to one of the die regions, and at each one of the die regions the glue provides an air-tight encapsulation of one of the light-emitting devices by a respective one of the microlenses. Further, phosphor is included as a part of the lens board.

An LED emitter uses a molded lens with phosphor material embedded in a circumferential trench to generate a batwing beam pattern. After the lens is molded over a package substrate with connected LED dies thereon, the phosphor material is molded, injected, or dispensed into a circumferential trench. The molded lens is shaped such that a majority of the light emitted by the one or more LED dies is reflected by the top surface to the side surfaces through the phosphor material.

Growing community of inventors

Taoyuan, Taiwan

Hao-Yu Yang