LED display with pixel circuitry disposed on a substrate backside
A display comprises a substrate (e.g., glass), a plurality of pixel circuits disposed on a back surface of the substrate, and a plurality of self-emitting devices disposed on a front surface of the substrate. The self-emitting devices are electrically connected to the plurality of pixel circuits by at least one electrically conductive via traveling through the substrate. Each pixel circuit comprises a first and a second transistor and a capacitor. The self-emitting devices may be LEDs or OLEDs for example.
1. A display, comprising:
at least one electrically conductive via;
a glass substrate;
a plurality of pixel circuits disposed on a back surface of the substrate, each pixel circuit comprising a first transistor, a second transistor and a capacitor, each pixel circuit made of single crystal silicon; and
a plurality of self-emitting devices disposed on a front surface of the substrate and electrically connected to the plurality of pixel circuits by the at least one electrically conductive via traveling through the glass substrate.
2. The display of claim 1 , wherein the substrate is opaque.
3. The display of claim 2 , wherein the front or back surface is painted opaque.
4. The display of claim 1 , wherein the at least one via are at least one-pixel distance from an edge of the display.
5. The display of claim 1 , further comprising a source line, a power line and a power ground line disposed on the back surface of the substrate.
6. The display of claim 1 , further comprising a power line disposed on the back surface of the substrate and electrically connected to the plurality of self-emitting devices by a second at least one electrically conductive via traveling through the substrate.
7. The display of claim 1 , further comprising a gate driver and a source driver, wherein the first transistor is coupled to one of the plurality of self-emitting devices and the second transistor is coupled to the gate driver and the source driver disposed on the back surface of the substrate.
8. The display of claim 1 , wherein each pixel of the display comprises a set of sub pixel circuits, each having a different color light-emitting device.
9. The display of claim 1 , wherein the self-emitting devices include light-emitting diodes or organic light-emitting diodes.
10. The display of claim 1 , wherein the substrate is glass, flexible substrate or polyimide.