Visible light sensor embedded organic light emitting diode display panels and display devices including the same
An OLED display panel may include a substrate, an OLED light emitter on the substrate and configured to emit light, and a visible light sensor on the substrate and configured to detect at least a portion of the emitted light based on reflection of the portion of the emitted light from a recognition target. The visible light sensor is in a non-light emitting region adjacent to the OLED light emitter so as to be horizontally aligned with the OLED light emitter in a horizontal direction extending parallel to an upper surface of the substrate, or between the substrate and a non-light emitting region adjacent to the OLED light emitter such that the visible light sensor is vertically aligned with the non-light emitting region in a vertical direction extending perpendicular to the upper surface of the substrate.
1. A display panel, comprising:
a substrate;
a driver stack on the substrate, the driver stack including a transistor array;
a light emitter on the substrate and the driver stack, the light emitter configured to emit light; and
a light sensor on the substrate and the driver stack, the light sensor configured to detect at least a portion of the emitted light based on reflection of the portion of the emitted light from a recognition target,
wherein the light sensor is
in a region adjacent to the light emitter so as to be horizontally aligned with the light emitter in a horizontal direction extending parallel to an upper surface of the substrate, or
between the substrate and a region that is adjacent to the light emitter such that the light sensor is vertically aligned with the region in a vertical direction extending perpendicular to the upper surface of the substrate.
2. The display panel of claim 1 , wherein the light sensor is a visible light sensor configured to absorb light in a wavelength spectrum of visible light.
3. The display panel of claim 2 , wherein the visible light sensor includes an organic photodiode including an organic material.
4. The display panel of claim 3 , wherein
the organic photodiode includes a lower electrode, an upper electrode, and a visible light absorption layer between the lower and upper electrodes,
the lower electrode is a reflecting electrode, and
the upper electrode is a transparent electrode.
5. The display panel of claim 1 , wherein the region adjacent to the light emitter is a non-light emitting region.
6. The display panel of claim 1 , wherein the light emitter includes a visible light emitter stack, the visible light emitter stack including a plurality of sub-pixels including a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
7. The display panel of claim 6 , wherein the light sensor is partially overlapped with at least one visible light emitter stack in the vertical direction.
8. The display panel of claim 6 , wherein
the light emitter further includes an infrared light emitter configured to emit infrared light; and
the light sensor includes an infrared light sensor configured to detect at least a portion of the emitted infrared light based on reflection of the portion of the emitted infrared light from the recognition target,
wherein the infrared light sensor is
in a separate region that is adjacent to the infrared light emitter, or
between the substrate and a separate region that is adjacent to the infrared light emitter.
9. A display device comprising the display panel of claim 1 .
10. A display panel, comprising:
a substrate;
a driver stack on the substrate, the driver stack including a transistor array;
a light emitter stack on the substrate and the driver stack, the light emitter stack including a plurality of sub-pixels including a red sub-pixel, a green sub-pixel, and a blue sub-pixel, each of the red, green, and blue sub-pixels configured to emit light; and
a light sensor on the substrate and the driver stack, the light sensor configured to detect at least a portion of the emitted light based on reflection of the portion of the emitted light from a recognition target,
wherein
the light sensor is horizontally aligned with at least one adjacent sub-pixel of the light emitter stack in a horizontal direction extending parallel to an upper surface of the substrate, or
the light sensor is vertically aligned with a region that is adjacent to the light emitter stack in a vertical direction extending perpendicular to the upper surface of the substrate.
11. The display panel of claim 10 , wherein the light sensor is a visible light sensor configured to absorb light in a wavelength spectrum of visible light.
12. The display panel of claim 11 , wherein the visible light sensor includes an organic photodiode including an organic material.
13. The display panel of claim 12 , wherein
the organic photodiode includes a lower electrode, an upper electrode, and a visible light absorption layer between the lower and upper electrodes,
the lower electrode is a reflecting electrode, and
the upper electrode is a transparent electrode.
14. A display device comprising the display panel of claim 10 .
15. A display panel, comprising:
a substrate;
a driver stack on the substrate, the driver stack including a transistor array;
a light emitter stack on the substrate and the driver stack, the light emitter stack including a red sub-pixel, a green sub-pixel, and a blue sub-pixel, each of the red, green, and blue sub-pixels configured to emit light; and
a light sensor on the substrate and the driver stack, the light sensor configured to detect at least a portion of the emitted light based on reflection of the portion of the emitted light from a recognition target,
wherein the red sub-pixel, the green sub-pixel, the blue sub-pixel, and the light sensor are arranged in a horizontal direction extending parallel to an upper surface of the substrate.
16. The display panel of claim 15 , wherein the light emitter stack is an OLED light emitter stack, and the light sensor includes an organic photodiode.
17. The display panel of claim 15 , wherein each of the light emitter stack and the light sensor comprises an upper electrode and a lower electrode, the upper electrodes of the light emitter stack and the light sensor are formed with a transflective electrode, and the lower electrodes of the light emitter stack and the light sensor are formed with reflective electrode.
18. The display panel of claim 15 , wherein the light sensor is in a non-light emitting region that is adjacent to at least one the red sub-pixel, the green sub-pixel, and the blue sub-pixel.
19. The display panel of claim 15 , wherein the display panel includes a pattern of red sub-pixels, a pattern of green sub-pixels, and a pattern of blue sub-pixels, and one green sub-pixel in the pattern of green sub-pixels is replaced with the light sensor, such that the light sensor occupies a location of the one green sub-pixel in the pattern of the green sub-pixels.
20. A display device comprising the display panel of claim 15 .