Light emitting modules with optical data transmission
A light emitting module including a first surface having a plurality of light emitting elements, a second surface configured to receive driving signals and to transfer these signals to the light emitting elements of the first surface. The second surface includes a plurality of optical transmitters, in which the optical transmitters are each associated to an associated optical receiver arranged on the first surface, the optical transmitter and the associated opposing optical receiver being separated by an optical medium, such that an optical signal including driving signals transmitted by the optical transmitter is received by the opposing optical receiver, each optical receiver being connected to at least one light emitting element and is configured to transform the optical signal into an electrical signal configured to drive the at least one light emitting element to generate an image on the display.
1 . A light emitting module comprising:
a first surface comprising a plurality of light emitting elements, a second surface configured to receive driving signals and to transfer these signals to the light emitting elements of the first surface,
wherein the second surface comprises a plurality of optical transmitters, wherein the optical transmitters are each associated to an opposing optical receiver arranged on the first surface, the optical transmitter and the associated opposing optical receiver being separated by an optical medium, such that an optical signal comprising driving signals transmitted by the optical transmitter is received by the associated opposing optical receiver,
each optical receiver being connected to at least one light emitting element and is configured to transform said optical signal into an electrical signal configured to drive the at least one light emitting element to generate an image for a display.
2 . The light emitting module according to claim 1 , wherein the optical receiver is an optical photosensitive device.
3 . The light emitting module according to claim 1 , wherein the optical transmitter is a light emitting element, wherein said light emitting element is an LED, OLED, QD-LED, EL-QLED, AMOLED, mini-LED, micro-LED, or a laser.
4 . The light emitting module according to claim 1 , wherein the light emitting elements are any one of LEDs, OLEDs, QD-LEDs, EL-QLEDs, AMOLEDs, mini-LEDs, or micro-LEDs.
5 . The light emitting module according to claim 1 , wherein the first surface and/or the second surface is a Thin Film Transistor (TFT) on glass, TFT on polyimide, a Printed Circuit Board (PCB).
6 . The light emitting module according to claim 1 , wherein refractive indexes of the first and second surfaces are chosen to minimize total internal reflections of light.
7 . The light emitting module according to claim 1 , wherein an aperture is provided along the optical path between each optical transmitter and its associated optical receiver, said aperture being configured to render the light beam emitted by the optical transmitter specular upon reaching the optical receiver.
8 . The light emitting module according to claim 7 , wherein the apertures are arranged in an aperture layer, said layer being provided between the first surface and the second surface, wherein the aperture layer is preferably laminated or attached, and/or wherein the aperture layer preferably comprises light absorbing properties.
9 . The light emitting module according to claim 8 , wherein refractive indexes of the aperture layer and the refractive index of the first and second surfaces are chosen to minimize total internal reflections of light.
10 . The light emitting module according to claim 8 , wherein the aperture layer has a thickness which is at least a diameter of the apertures such that each aperture is a lightguide funnel for selectively transmitting the specular beam emitted by the optical transmitter towards the optical receiver.
11 . The light emitting module according to claim 1 , wherein an optical lens is provided for each pair of optical receiver and optical transmitter along the optical path between the optical transmitter and its associated optical receiver, said optical lens being configured to focus the light beam emitted by the optical transmitter on the optical receiver.
12 . The light emitting module according to claim 11 , wherein the optical lenses are arranged in a micro lenticular lens.
13 . The light emitting module according to claim 11 , wherein the optical lenses are provided in the apertures of the aperture layer.
14 . The light emitting module according to claim 1 , wherein two adjacent optical transmitters are configured to emit a different type of radiation and the associated optical receiver is configured to receive the radiation of its associated optical transmitter.
15 . The light emitting module according to claim 14 , wherein an optical receiver is configured to receive the same spectral bandwidth as its associated optical transmitter.
16 . The light emitting module according to claim 15 , wherein two adjacent optical transmitters emit light having a different spectral bandwidth.
17 . The light emitting module according to claim 14 , wherein an optical transmitter is configured to transmit light having at least two different spectral bandwidths, and the associated optical receiver is configured to be sensitive to these two different spectral bandwidths.
18 . The light emitting module according to claim 17 , wherein the associated optical receiver comprises an output per spectral bandwidth.
19 . The light emitting module according to claim 1 , wherein sensitivity of the optical receiver is modulated to selectively react to the incident specular light of the associated optical transmitter.
20 . The light emitting module according to claim 19 , wherein a neutral density layer is provided between the optical transmitter and the optical receiver.
21 . The light emitting module according to claim 19 , wherein the power of the optical transmitter is reduced to increase the signal to noise ratio at the optical receiver, or wherein the sensitivity of the optical receiver is modulated by adapting the threshold level of the analog signal received by the optical receiver.
22 . The light emitting module according to claim 1 , wherein the optical receivers are covered by a protective layer to reduce the infiltration of ambient light inside the light emitting module, or
wherein the optical transmitters are covered by a protecting cover to reduce the infiltration of ambient light within the light emitting module, or
wherein the optical transmitters and associated optical receivers are arranged to optimize the space on the first and the second surfaces.