LED array having transparent substrate with conductive layer for enhanced current spread

A light emitting diode (LED) assembly comprising:

• a substrate assembly comprising a first substrate of a first type, a layer of light emitting material, and a second substrate of a second type;
• one or more contacts of a first type formed on a first surface of or within the first substrate;
• an array of LEDs, wherein each LED of the array of LEDs corresponds to a respective contact of a second type formed on a first surface of the second substrate, the array of LEDs sharing the one or more contacts of the first type and configured to emit light when current is applied between the respective contacts of the second type and at least one of the one or more contacts of the first type;
• and
• a current spreading layer formed on a second surface of the first substrate opposite to the first surface of or within the first substrate, wherein the current spreading layer reduces a voltage difference between different LEDs of the array of LEDs during operation of the LED assembly, and wherein the current spreading layer is formed within one or more trenches formed on the second surface of the first substrate.

A light emitting diode (LED) assembly comprising:

• a substrate assembly comprising a first substrate of a first type, a layer of light emitting material, and a second substrate of a second type;
• one or more contacts of a first type formed on a first surface of or within the first substrate;
• an array of LEDs, wherein each LED of the array of LEDs corresponds to a respective contact of a second type formed on a first surface of the second substrate, the array of LEDs sharing the one or more contacts of the first type and configured to emit light when current is applied between the respective contacts of the second type and at least one of the one or more contacts of the first type;
• and
• a current spreading layer formed on a second surface of the first substrate opposite to the first surface of or within the first substrate, wherein the current spreading layer reduces a voltage difference between different LEDs of the array of LEDs during operation of the LED assembly, and wherein the current spreading layer comprises a first portion formed on the second surface of the first substrate, and a second portion formed within one or more trenches formed on the second surface of the first substrate.