Light emitting diode display
A light emitting diode display includes a driving substrate, a plurality of micro light-emitting devices, a first common electrode, and a second common electrode. The micro light-emitting devices are arranged on the driving substrate. Each of the micro light-emitting devices includes an epitaxial structure, a first type electrode, and a second type electrode. The first common electrode is disposed on the driving substrate and located between the second type electrodes of the micro light-emitting devices, wherein the first common electrode exposes at least a portion of an upper surface of each of the second type electrodes. The second common electrode is located between the second type electrodes of the micro light-emitting devices and electrically connected to the first common electrode, wherein the second common electrode does not directly contact the micro light-emitting devices.
1. A light emitting diode display, comprising:
a driving substrate;
a plurality of micro light-emitting devices, arranged on the driving substrate, each of the plurality of micro light-emitting devices comprising an epitaxial structure, a first type electrode, and a second type electrode, the first type electrode and the second type electrode being disposed on the opposite sides of the epitaxial structure;
a first common electrode, disposed on the driving substrate and located between the second type electrodes of the plurality of micro light-emitting devices, wherein the first common electrode exposes at least a portion of an upper surface of each of the second type electrodes, and
a second common electrode, located between the second type electrodes of the plurality of micro light-emitting devices and electrically connected to the first common electrode, wherein the second common electrode does not directly contact the plurality of micro light-emitting devices.
2. The light emitting diode display as recited in claim 1 , wherein a transmittance of the second type electrode of each of the plurality of micro light-emitting devices is greater than a transmittance of the first common electrode and/or the second common electrode.
3. The light emitting diode display as recited in claim 1 , wherein a first electrical conductivity of the first common electrode and a second electrical conductivity of the second common electrode are greater than a third electrical conductivity of the second type electrode.
4. The light emitting diode display as recited in claim 3 , wherein the second electrical conductivity of the second common electrode is greater than the first electrical conductivity of the first common electrode.
5. The light emitting diode display as recited in claim 1 , wherein the second common electrode is disposed between the driving substrate, the plurality of micro light-emitting devices and the first common electrode.
6. The light emitting diode display as recited in claim 1 , wherein the first common electrode is disposed between the driving substrate, the plurality of micro light-emitting devices and the second common electrode.
7. The light emitting diode display as recited in claim 1 , wherein a ratio of a first width of the first common electrode to a second width of the second common electrode is greater than or equal to 0.3 and less than or equal to 1.
8. The light emitting diode display as recited in claim 7 , wherein the first width and the second width are less than 10 micrometers.
9. The light emitting diode display as recited in claim 1 , wherein a ratio of a width of the second common electrode to a width of two of the plurality of micro light-emitting devices is greater than or equal to 0.8 and less than or equal to 1.
10. The light emitting diode display as recited in claim 1 , wherein a surface of the first common electrode is completely exposed, and the first common electrode only on sides of the plurality of micro light-emitting devices.
11. The light emitting diode display as recited in claim 1 , wherein a portion of a surface of the first common electrode is exposed, and the first common electrode is disposed on a portion of upper surfaces and sides of the plurality of micro light-emitting devices.
12. The light emitting diode display as recited in claim 11 , wherein an area ratio of an area of the first common electrode disposed on the upper surfaces to an area of the first common electrode is less than or equal to 0.2.
13. The light emitting diode display as recited in claim 1 , wherein a material of the first common electrode and a material of the second common electrode respectively comprise a metal, a conductively polymer material or a combination thereof.
14. The light emitting diode display as recited in claim 1 , wherein a first thickness of the first common electrode and a second thickness of the second common electrode are less than or equal to a third thickness of the second type electrode, respectively.
15. The light emitting diode display as recited in claim 14 , wherein the first thickness of the first common electrode plus the second thickness of the second common electrode is less than or equal to the third thickness of the second type electrode.
16. The light emitting diode display as recited in claim 1 , further comprising:
a transparent electrode, disposed on each of the plurality of micro light-emitting devices, the first common electrode and the second common electrode, wherein the transparent electrode at least directly contacts the second type electrode of each of the plurality of micro light-emitting devices and the first common electrode or the second type electrode of each of the plurality of micro light-emitting devices, the first common electrode and the second common electrode.