BACKGROUND

Field

The present disclosure relates generally to vertical LEDs and, more particularly, to vertical LEDs having light output that is similar to the light output by lateral LEDs.

Background

Solid state light emitting devices, such as light emitting dies (LEDs), are attractive candidates for replacing conventional light sources such as incandescent, halogen, and fluorescent lamps. LEDs have substantially longer lifetimes than all three of these types of conventional light sources. In addition, some types of LEDs now have higher conversion efficiencies than fluorescent light sources and still higher conversion efficiencies have been demonstrated in laboratories. Finally, LEDs contain no mercury or other potentially dangerous materials, therefore, providing various safety and environmental benefits.

Several different LED designs exist today, including vertical LEDs and lateral LEDs. Vertical LEDs have been considered as a replacement for lateral LEDs in array packages because vertical LEDs perform better than conventional lateral LEDs. However, simply using a vertical LED as a “drop-in” replacement for a lateral LED produces a 20% lumen drop in most LED chip-on-board configurations due to the occurrence of light absorbing effects between LEDs. Therefore, it is difficult to use vertical LEDs as a replacement for lateral LEDs without additional optimization to account for the lumen drop.

SUMMARY

Several aspects of the present invention will be described more fully hereinafter with reference to various apparatuses.

One aspect of a light emitting apparatus includes a substrate. The light emitting apparatus includes a light emitting die arranged on the substrate. The light emitting die includes one or more side walls. The light emitting apparatus includes a reflective die attach material extending along the one or more side walls of the light emitting die.

Another aspect of the light emitting apparatus includes a substrate. The light emitting apparatus includes a light emitting die arranged on the substrate. The light emitting die includes a translucent carrier substrate.

One aspect of a lamp includes a housing. The lamp includes a light emitting apparatus coupled to the housing. The light emitting apparatus includes a substrate. The light emitting apparatus includes several light emitting dies arranged on the substrate. Each of the light emitting dies includes one or more side walls. The light emitting apparatus includes a reflective die attach material extending along the one or more side walls of each of the light emitting dies.

