Integrated multilayer monolithic assembly LED displays and method of making thereof
A monolithic Light Emitting Diode (LED) micro-display contains one or more modular LED arrays. The LED array uses quantum dot light conversion technology or Organic Light Emitting Diode (OLED). The micro-display has a spacing-saving topology and a direct current driver architecture. Its modular design is scalable, which allows manufacturing micro-displays of various sizes using the same module.
1. A monolithic light-emitting diode (LED) panel, comprising:
a first layer comprising an LED array having rows and columns of interconnected LED pixels, each LED pixel has a red LED, a green LED, and a blue LED, and each LED has a cathode and an anode;
a second layer comprising a plurality of driver circuits, each driver circuit is connected to a power source and comprises an on-off switch; and
a plurality of cathode buses and a plurality of anode buses disposed between the first layer and the second layer,
wherein each of the plurality of driver circuits outputs a constant current to one of the plurality of cathode buses or to one of the plurality of anode buses, and
wherein the cathode of each LED is connected to one of the plurality of cathode buses and the anode of each LED is connected to one of the plurality of anode buses.
2. The monolithic LED panel of claim 1 , wherein each anode bus connects anodes of LEDs of a same color in a column and each cathode bus connects cathodes of the red LEDs, the green LEDs, and the blue LEDs in a row, each anode bus receives a constant current outputted from the driver circuit, and each cathode bus is connected to the on-off switch in the driver circuit.
3. The monolithic LED panel of claim 1 , wherein each anode bus connects anodes of the red LEDs, the green LEDs, and the blue LEDs in a row, each cathode bus connects cathodes of LEDs of a same color in a column, each cathode bus receives a constant current outputted from the driver circuit, and each anode bus is connected to the on-off switch in the driver circuit.
4. The monolithic LED panel of claim 1 , wherein the red LED, the green LED, and the blue LED are quantum dot LEDs or organic LEDs.