Epistar Corporation

Chun-Hua Shih

Ching-Tai Cheng

Yih-Hua Renn

Lung-Kuan Lai

Guan-Wu Chen

Ju-Lien Kuo

Hsuan-Tzu Peng

A light-emitting device includes a light-emitting element and a wavelength conversion layer. The light-emitting element has a top surface, a bottom surface, a side surface, and a first electrical contact formed on the bottom surface. The distance between the top surface and the bottom surface has a first height (h). The wavelength conversion layer has a first area (A) located on the top surface of the light-emitting element and a second area (A) located on the side surfaces and surrounding the first area. The first area has a second height (h). The second area has a third height (h) and a second width (w). The second height (h) is greater than the second width (w). The difference of the third height and the sum of the first height and the second height is less than 15 &#x3bc;m.

Light-emitting device with optimized viewing angle

A light-emitting device includes a light-emitting element, a wavelength conversion layer, a light pervious element and a light-reflecting enclosure. The light-emitting element includes a top surface, a bottom surface, and a side surface between the top surface and the bottom surface. The wavelength conversion layer covers the top surface of the light-emitting element, and includes a plurality of wavelength conversion particles having an equivalent particle diameter D50. The light pervious element includes a recess structure and an outer wall. The light-reflecting enclosure surrounds the outer wall. The D50 of the wavelength conversion particles is not great than 10 &#x3bc;m. The recess structure is laterally overlapped with the side surface of the light-emitting element and the wavelength conversion layer.

Light-emitting device and manufacturing method thereof

A light-emitting device includes a light-emitting element, a wavelength converting layer and a light-adjusting layer. The light-emitting element has a first upper surface, a bottom surface, and a lateral surface between the first upper surface and the bottom surface. The wavelength converting layer includes a plurality of wavelength converting particles, and has a second upper surface on the first upper surface. The light-adjusting layer surrounds the lateral surface and has a first composition or a second composition. The first composition includes a first binder and a plurality of first light-diffusing particles. The second composition includes a second binder, a plurality of second light-diffusing particles, and a plurality of light-scattering particles.

A light-emitting device includes a light-emitting element, a cover layer, and an anti-adhesion layer. The light-emitting element has a top surface, a bottom surface and a side surface. The cover layer covers the light-emitting element and includes a first transparent binder. The anti-adhesion layer includes a flouro-resin or a fluoride compound and disposed on the cover layer and the top surface as an outermost layer of the light-emitting device. The anti-adhesion layer has a hardness greater than a hardness of the cover layer.

Light-emitting device

A light-emitting device includes a light-emitting element, a wavelength conversion layer and a light pervious element. The light-emitting element includes a top surface, a bottom surface, a plurality of side surfaces connecting to the top surface and the bottom surface, and a first electrical contact formed on the bottom surface. The wavelength conversion layer covers the top surface of the light-emitting element to form a first thickness, has an average thickness, and includes a transparent binder and a plurality of wavelength conversion particles having an equivalent particle diameter D. The light pervious element includes a light exiting surface and is disposed on the wavelength conversion layer. The Dof the wavelength conversion particles is not great than 10 &#x3bc;m. A ratio of the average thickness to the Dof the wavelength conversion layer is ranged from 6 to 20.

A light-emitting device includes a light-emitting element, and a covering layer. The light-emitting element includes a top surface, a bottom surface, a light-emitting stack between the top surface and the bottom surface, and an adhesion enhancing layer surrounding the light-emitting stack. The covering layer covers the light-emitting element and contacts the adhesion enhancing layer. Moreover, the adhesion enhancing layer includes an oxide and a thickness greater than 5 nm and less than 1000 nm.

A light-emitting device includes a light-emitting element, a cover layer, and an anti-adhesion layer. The light-emitting element has a top surface, a bottom surface and a first side surface. The cover layer covers the light-emitting element and includes a first transparent binder and a plurality of wavelength conversion particles dispersed within the first transparent binder. The anti-adhesion layer includes a fluoro-containing material, and is disposed on the cover layer and the top surface.

Growing community of inventors

Hsinchu, Taiwan

Chun-Hua Shih