Sapphire substrate configured to form light emitting diode chip providing light in multi-directions, light emitting diode chip, and illumination device

Abstract

A sapphire substrate configured to form a light emitting diode (LED) chip providing light in multi-directions, a LED chip and an illumination device are provided in the present invention. The sapphire substrate includes a growth surface and a second main surface opposite to each other. A thickness of the sapphire substrate is thicker than or equal to 200 micrometers. The LED chip includes the sapphire substrate and at least one LED structure. The LED structure is disposed on the growth surface and forms a first main surface where light emitted from with a part of the growth surface without the LED structures. At least a part of light beams emitted from the LED structure pass through the sapphire substrate and emerge from the second main surface. The illumination device includes at least one LED chip and a supporting base. The LED chip is disposed on the supporting base.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a sapphire substrate, a light emitting diode chip, and an illumination device, and more particularly, to a sapphire substrate configured to form a light emitting diode chip providing light in multi-directions, a light emitting diode chip, and an illumination device including the light emitting diode chip.[0003]2. Description of the Prior Art[0004]A light beam emitted from a light emitting diode (LED) is a kind of directional light source, which is different from a dispersive light source of a conventional bulb. Accordingly, applications of LED are limited. For instance, the conventional LED can not or may be hard to provide required lighting effect for indoor and outdoor illumination applications. Additionally, conventional LED illumination devices emit light beams from a single side and luminous efficiency of the conventional LED illumination device is relatively low accordingly.SUMMARY...

AI Technical Summary

Benefits of technology

The present invention provides a sapphire substrate that can be used to make a light emitting diode (LED) chip that can emit light in multiple directions. This improves the efficiency of the LED chip and the shape of the emitted light. The LED chip is made using wafer-level processes, which reduces manufacturing costs and improves reliability. The LED chip has a transparent substrate that allows the light to pass through, and the LED structure is placed on top of this substrate. This results in a multi-directional LED chip that can be used to create an illumination device with improved efficiency and shape.

Problems solved by technology

Accordingly, applications of LED are limited.

For instance, the conventional LED can not or may be hard to provide required lighting effect for indoor and outdoor illumination applications.

Additionally, conventional LED illumination devices emit light beams from a single side and luminous efficiency of the conventional LED illumination device is relatively low accordingly.

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