Light-emitting diode display
A light-emitting diode (LED) display includes a top-emission LED that emits light upward; a bottom-emission LED that emits light downward; and a spacer disposed between the top-emission LED and the bottom-emission LED, thereby providing a dual-sided display.
1. A light-emitting diode (LED) display, comprising:
a top-emission LED that emits light upward;
a bottom-emission LED that emits light downward; and
a spacer disposed between the top-emission LED and the bottom-emission LED, thereby providing a dual-sided display;
wherein the top-emission LED comprises:
a transparent substrate;
a first light blocking layer entirely formed above the transparent substrate and extended to the spacer; and
a second light blocking layer entirely formed below the transparent substrate and extended to the spacer.
2. The display of claim 1 , wherein the top-emission LED comprises:
a first reflective layer entirely formed above the first light blocking layer and extended to the spacer; and
a first LED disposed above the first reflective layer.
3. The display of claim 1 , wherein the first light blocking layer extended to the spacer is different in length from the second light blocking layer extended to the spacer.
4. The display of claim 2 , wherein the top-emission LED further comprises:
a first insulation layer and a second insulation layer consecutively formed above the first reflective layer;
a first metal conductive layer and a second metal conductive layer respectively formed in the first insulation layer and the second insulation layer;
an encapsulation layer covering the first LED; and
a light guide layer formed above the encapsulation layer.
5. The display of claim 4 , wherein the encapsulation layer has refractivity being greater than 1.
6. The display of claim 4 , wherein the bottom-emission LED comprises:
the first light blocking layer formed above a top peripheral surface of the transparent substrate;
the second light blocking layer formed below a bottom peripheral surface of the transparent substrate;
a second LED disposed above the transparent substrate;
a second reflective layer formed above the second LED; and
a third light blocking layer formed above the second reflective layer and extended to the spacer.
7. The display of claim 6 , wherein the first reflective layer and the second reflective layer have reflectivity being equal to or greater than 70%.
8. The display of claim 6 , wherein the first light blocking layer, the second light blocking layer and the third light blocking layer comprise a dark, no-reflective, non-transmissive and light-absorption material with optical density equal to or greater than 3.
9. The display of claim 6 , wherein the bottom-emission LED further comprises:
the first insulation layer and the second insulation layer consecutively formed above the transparent substrate;
the first metal conductive layer and the second metal conductive layer respectively formed in the first insulation layer and the second insulation layer;
the encapsulation layer covering the second LED; and
the light guide layer formed above the encapsulation layer.
10. The display of claim 1 , wherein the top-emission LED and the bottom-emission LED are driven by independent signals, and belong to different pixels respectively.
11. The display of claim 1 , wherein the top-emission LED and the bottom-emission LED are driven by independent signals, and belong to a same pixel.
12. The display of claim 1 , wherein top-emission LEDs are longitudinally disposed, and bottom-emission LEDS are longitudinally disposed.
13. The display of claim 1 , wherein top-emission LEDs are laterally disposed, and bottom-emission LEDs are laterally disposed.
14. The display of claim 1 , wherein top-emission LEDs are interlaced with bottom-emission LEDs.
15. The display of claim 1 , wherein the top-emission LED and the bottom-emission LED are micro-light-emitting diodes (microLEDs).
16. A light-emitting diode (LED) display, comprising:
a plurality of pixels, each including a plurality of LEDs with first electrodes connected to a driver via data lines respectively and with second electrodes connected together to a common line;
a plurality of transparent electric wires disposed in the plurality of pixels; and
black matrix (BM) covering the plurality of LEDs and data lines but not covering the transparent electric wires.
17. The display of claim 16 , wherein the transparent electric wires have optical transmittance equal to or greater than 85%.
18. The display of claim 16 , wherein the transparent electric wires comprise transparent conductive material.
19. The display of claim 18 , wherein the transparent conductive material comprises indium tin oxide (ITO), indium-doped zinc oxide (IZO) or aluminum-doped zinc oxide (AZO).
20. The display of claim 16 , wherein the plurality of LEDs are micro-light-emitting diodes (microLEDs).