Near-infrared light organic sensors, embedded organic light emitting diode panels, and display devices including the same
An OLED panel may be embedded with a near-infrared organic photosensor and may be configured to implement biometric recognition without an effect on an aperture ratio of an OLED emitter. The OLED panel may include a substrate, an OLED stack on the substrate and configured to emit visible light, and an NIR light sensor stack between the substrate and the OLED stack and including an NIR emitter configured to emit NIR light and an NIR detector. The OLED panel may be included in one or more various electronic devices.
1. An Organic Light Emitting Diode (OLED) panel embedded with a Near Infrared (NIR) light sensor, the OLED panel comprising:
a plurality of OLED pixels, the plurality of OLED pixels including
a substrate;
an OLED stack on the substrate, the OLED stack configured to emit visible light in a first direction; and
an NIR light sensor stack between the substrate and the OLED stack, the NIR light sensor stack including
an NIR emitter configured to emit NIR light through the OLED stack in the first direction, and
an NIR detector configured to receive NIR light through the OLED stack,
wherein both the NIR emitter and the NIR detector are in one or more sub-pixels of an OLED pixel of the plurality of OLED pixels, while neither of any NIR emitter or any NIR detector are in one or more other sub-pixels of the OLED pixel of the plurality of OLED pixels.
2. The OLED panel embedded with the NIR light sensor of claim 1 , wherein the OLED stack is configured to emit light away from the NIR light sensor stack.
3. The OLED panel embedded with the NIR light sensor of claim 2 , wherein an OLED emitter of the OLED stack includes
an organic light emitting diode (OLED) including an organic emission layer and a plurality of electrodes on opposite surfaces of the organic emission layer, such that a first electrode of the plurality of electrodes is under the organic emission layer and a second electrode of the plurality of electrodes is over the organic emission layer, and
the second electrode includes a transparent electrode.
4. The OLED panel embedded with the NIR light sensor of claim 3 , wherein
the first electrode includes a separate transparent electrode.
5. The OLED panel embedded with the NIR light sensor of claim 1 , further comprising:
a driver between the substrate and the NIR light sensor stack, the driver configured to input and output electrical signals of each of the NIR light sensor stack and the OLED stack.
6. The OLED panel embedded with the NIR light sensor of claim 1 , wherein a driver configured to input and output an electrical signal from the NIR light sensor stack and a driver configured to input and output an electrical signal from the OLED stack are on a substantially common plane.
7. The OLED panel embedded with the NIR light sensor of claim 1 , wherein the NIR emitter is an NIR organic photodiode that is configured to emit NIR light of a wavelength spectrum of about 800 nm to about 1500 nm.
8. The OLED panel embedded with the NIR light sensor of claim 7 , wherein
the NIR organic photodiode includes an organic emission layer configured to emit the NIR light and lower and upper electrodes on opposite surfaces of the organic emission layer, respectively, and
the upper electrode is a transparent electrode and the lower electrode is a reflective electrode.
9. The OLED panel embedded with the NIR light sensor of claim 1 , wherein the NIR detector is an NIR organic photodiode that is configured to absorb NIR light of a wavelength spectrum of about 800 nm to about 1500 nm.
10. The OLED panel embedded with the NIR light sensor of claim 9 , wherein the NIR organic photodiode includes
an organic light-absorbing layer configured to absorb the NIR light and lower and upper electrodes on opposite surfaces of the organic light-absorbing layer, respectively,
wherein the upper electrode is a transparent electrode having a transmittance equal to or greater than about 80%, and the lower electrode is a reflective electrode.
11. The OLED panel embedded with the NIR light sensor of claim 1 , wherein the NIR light sensor stack is configured to detect a fingerprint, an iris, or a face image.
12. A display device comprising the OLED panel embedded with the NIR light sensor of claim 11 .
13. An Organic Light Emitting Diode (OLED) panel, comprising:
a plurality of OLED pixels, the plurality of OLED pixels including
a substrate;
an OLED stack on the substrate, the OLED stack configured to emit visible light in a first direction; and
an NIR light sensor stack between the substrate and the OLED stack, the NIR light sensor stack including
an NIR emitter configured to emit NIR light in the first direction through the OLED stack, and
an NIR detector configured to receive NIR light through the OLED stack,
wherein both the NIR emitter and the NIR detector are in one or more sub-pixels of an OLED pixel of the plurality of OLED pixels, while neither of any NIR emitter or any NIR detector are in one or more other sub-pixels of the OLED pixel of the plurality of OLED pixels.
14. The OLED panel of claim 13 , further comprising:
a driver between the substrate and the NIR light sensor stack, the driver configured to input and output electrical signals of each of the NIR light sensor stack and the OLED stack.
15. The OLED panel of claim 13 , wherein a driver configured to input and output an electrical signal from the NIR light sensor stack and a driver configured to input and output an electrical signal from the OLED stack are on a substantially common plane.
16. The OLED of claim 13 , wherein the NIR emitter is an NIR organic photodiode that is configured to emit NIR light of a wavelength spectrum of about 800 nm to about 1500 nm.
17. The OLED panel of claim 16 , wherein
the NIR organic photodiode includes an organic emission layer configured to emit the NIR light and lower and upper electrodes on opposite surfaces of the organic emission layer, respectively, and
the upper electrode is a transparent electrode and the lower electrode is a reflective electrode.
18. The OLED panel of claim 13 , wherein the NIR detector is an NIR organic photodiode that is configured to absorb NIR light of a wavelength spectrum of about 800 nm to about 1500 nm.
19. The OLED panel of claim 18 , wherein the NIR organic photodiode includes
an organic light-absorbing layer configured to absorb the NIR light and lower and upper electrodes on opposite surfaces of the organic light-absorbing layer, respectively,
wherein the upper electrode is a transparent electrode having a transmittance equal to or greater than about 80%, and the lower electrode is a reflective electrode.
20. An electronic device, comprising:
a memory;
a processor; and
a display device including an Organic Light Emitting Diode (OLED) panel, the OLED panel including a plurality of OLED pixels, the plurality of OLED pixels including
a substrate;
an OLED stack on the substrate, the OLED stack configured to emit visible light in a first direction; and
an NIR light sensor stack between the substrate and the OLED stack, the NIR light sensor stack including
an NIR emitter configured to emit NIR light in the first direction through the OLED stack, and
an NIR detector configured to receive NIR light through the OLED stack,
wherein both the NIR emitter and the NIR detector are in one or more sub-pixels of an OLED pixel of the plurality of OLED pixels, while neither of any NIR emitter or any NIR detector are in one or more other sub-pixels of the OLED pixel of the plurality of OLED pixels.
21. The electronic device of claim 20 , wherein the processor is configured to execute a program of instructions stored in the memory to implement biometric recognition of an individual based on processing electrical signals received from the NIR light sensor to detect a fingerprint, an iris, or a face image.
22. The electronic device of claim 20 , wherein the OLED panel further includes
a driver between the substrate and the NIR light sensor stack, the driver configured to input and output electrical signals of each of the NIR light sensor stack and the OLED stack.
23. The electronic device of claim 20 , wherein a driver configured to input and output an electrical signal from the NIR light sensor stack and a driver configured to input and output an electrical signal from the OLED stack are on a substantially common plane.
24. The electronic device of claim 20 , wherein the NIR emitter is an NIR organic photodiode that is configured to emit NIR light of a wavelength spectrum of about 800 nm to about 1500 nm.
25. The electronic device of claim 24 , wherein
the NIR organic photodiode includes an organic emission layer configured to emit the NIR light and lower and upper electrodes on opposite surfaces of the organic emission layer, respectively, and
the upper electrode is a transparent electrode and the lower electrode is a reflective electrode.
26. The electronic device of claim 20 , wherein the NIR detector is an NIR organic photodiode that is configured to absorb NIR light of a wavelength spectrum of about 800 nm to about 1500 nm.
27. The electronic device of claim 26 , wherein the NIR organic photodiode includes
an organic light-absorbing layer configured to absorb the NIR light and lower and upper electrodes on opposite surfaces of the organic light-absorbing layer, respectively,
wherein the upper electrode is a transparent electrode having a transmittance equal to or greater than about 80%, and the lower electrode is a reflective electrode.