Electronic device display with array of discrete light-emitting diodes
An electronic device may include a display. The display may be formed by an array of light-emitting diodes mounted to the surface of a substrate. The substrate may be a silicon substrate. Circuitry may be located in spaces between the light-emitting diodes. Circuitry may also be located on the rear surface of the silicon substrate and may be coupled to the array of light-emitting diodes using through-silicon vias. The circuitry may include integrated circuits and other components that are attached to the substrate and may include transistors and other circuitry formed within the silicon substrate. Touch sensor electrodes, light sensors, and other components may be located in the spaces between the light-emitting diodes. The substrate may be formed from a transparent material that allows image light to reach a lens and image sensor mounted below the substrate.
1 . A display, comprising:
a substrate;
an array of light-emitting diode pixels on the substrate; and
an ambient light sensor mounted behind the array of light-emitting diode pixels and configured to detect ambient light while the light-emitting diode pixels are not actively emitting light, wherein the ambient light sensor comprises an array of light detectors and microlenses configured to focus the ambient light onto the respective light detectors.
2 . The display defined in claim 1 wherein the array of light-emitting diode pixels is configured to emit display light when the light detectors are not actively measuring the ambient light.
3 . The display defined in claim 1 wherein the microlenses comprise polymer microlenses that are aligned with respective gaps between the light-emitting diode pixels.
4 . The display defined in claim 1 wherein at least part of the substrate is curved.
5 . The display defined in claim 1 wherein the substrate comprises flexible polyimide.
6 . An electronic device, comprising:
a bent polymer substrate;
an array of display pixels on the bent polymer substrate and configured to emit display light; and
an optical sensor behind the array of pixels and configured to gather ambient light measurements while the array of display pixels is not emitting the display light, wherein the optical sensor comprises light detectors each covered by a respective microlens.
7 . The electronic device defined in claim 6 wherein the display pixels comprise discrete crystalline semiconductor light-emitting diodes.
8 . The electronic device defined in claim 7 wherein the discrete crystalline semiconductor light-emitting diodes are soldered to the bent polymer substrate.
9 . The electronic device defined in claim 6 wherein the bent polymer substrate is transparent.
10 . The electronic device defined in claim 6 wherein the bent polymer substrate comprises flexible polyimide.
11 . The electronic device defined in claim 6 further comprising a display cover glass overlapping the array of display pixels, wherein at least part of the display cover glass is curved.
12 . An electronic device, comprising:
a substrate;
an array of light-emitting diode pixels on the substrate, wherein the light-emitting diode pixels are separated by gaps and are configured to emit display light; and
a light sensor configured to detect light that passes through the gaps without detecting the display light, wherein the light sensor comprises microlenses and an array of light detectors.
13 . The electronic device defined in claim 12 wherein the light-emitting diode pixels comprise discrete crystalline semiconductor light-emitting diodes.
14 . The electronic device defined in claim 12 wherein the substrate comprises a flexible polymer substrate.
15 . The electronic device defined in claim 12 wherein the substrate comprises polyimide.
16 . The electronic device defined in claim 12 further comprising a display cover layer overlapping the array of light-emitting diode pixels, wherein at least part of the display cover layer is curved.
17 . The electronic device defined in claim 12 wherein at least part of the substrate is curved.
18 . The electronic device defined in claim 12 further comprising a display driver integrated circuit die soldered to the substrate.
19 . The electronic device defined in claim 12 wherein the light sensor comprises an ambient light sensor.
20 . The electronic device defined in claim 19 wherein the microlenses are each aligned with a respective one of the gaps.