Color imaging using array of wavelength-selective optoelectronic elements as light-field image or sensor
View Patent ↗Light-sensor array systems for capturing multiple-color images and light-fields using array of wavelength-selective optoelectronic elements (rather than wider-range photosensors prefaced with visible-band wavelength-selective optical elements such as color selective filters) as light-field or image sensors are presented. The light-sensor array can be one or more of transparent, bendable, and implemented on a curved surface. In some embodiments, the wavelength-selective light-sensing opto-electronic elements are arranged in a stacked array. In some embodiments, more than three wavelength-selective ranges can be employed in each light-sensing pixel. The invention can be used to implement one or more of a lensless imaging light-field camera, tactile gesture user interface, and/or proximate gesture user interface. In some embodiments, the light-sensor array system can be configured to emit light of one or more colors, and thus can additionally serve as an image display. In some embodiments, the wavelength-selective light-sensing opto-electronic elements are co-optimized for light sensing and emission.
1. A light-sensor array system for sensing a multiple-color image without the use of visible-band wavelength-selective optical elements, the light-sensor array system comprising:
a light-sensor array comprising a plurality of visible-band light-sensing pixels, each visible-band light-sensing pixel comprising:
at least three wavelength-selective light-sensing opto-electronic elements, each of the at least three wavelength-selective light-sensing opto-electronic elements comprising a light-sensing region and configured to produce wavelength-selective electrical responses to a particular range of wavelengths of visible-band light incident on the light-sensing region, each of the at least three wavelength-selective light-sensing opto-electronic elements having a different wavelength-selective electrical response characteristic from the other two wavelength-selective light-sensing opto-electronic elements,
wherein each of the plurality of visible-band light-sensing pixels is configured to produce an electrical output from each of the at least three wavelength-selective light-sensing opto-electronic elements comprising the visible-band light-sensing pixel,
signal processing responsive to the electrical output produced by each of the plurality of visible-band light-sensing pixels, the signal processing producing at least three measurement signals corresponding to color components of the visible-band light incident on the light-sensing region of the visible-band light-sensing pixel.
2. The light-sensor array system of claim 1 , wherein the at least three wavelength-selective light-sensing opto-electronic elements are adjacently located within each visible-band light-sensing pixel.
3. The light-sensor array system of claim 1 , wherein the at least three wavelength-selective light-sensing opto-electronic elements are arranged in the form of a stacked array.
4. The light-sensor array system of claim 1 , wherein the at least three wavelength-selective light-sensing opto-electronic elements are arranged as stacked organic light emitting diode (SOLED).
5. The light-sensor array system of claim 1 , wherein each visible-band light-sensing pixel comprises more than three wavelength-selective light-sensing opto-electronic elements, and
at least two color components are represented by the plurality of measurement signals.
6. The light-sensor array system of claim 1 , wherein at least one of the at least three measurement signals responds linearly to variations in light amplitude for light of an individual wavelength.
7. The light-sensor array system of claim 1 , wherein the light-sensor array is configured to emit light.
8. The light-sensor array system of claim 1 , wherein of some of the wavelength-selective light-sensing opto-electronic elements are co-optimized for both light sensing and light emission.
9. The light-sensor array system of claim 1 , wherein some of the wavelength-selective light-sensing opto-electronic elements are light-emitting diodes (LEDs).
10. The light-sensor array system of claim 1 , wherein some of the wavelength-selective light-sensing opto-electronic elements are organic light-emitting diodes (OLEDs).
11. The light-sensor array system of claim 1 , wherein the light-sensor array can operate as a visual display.
12. The light-sensor array system of claim 1 , wherein the light-sensor array is configured to operate as a color visual display.
13. The light-sensor array system of claim 1 , wherein the wavelength-selective light-sensing opto-electronic elements are transparent.
14. The light-sensor array system of claim 1 , wherein the wavelength-selective light-sensing opto-electronic elements are deposited on a transparent material.
15. The light-sensor array system of claim 1 , wherein the light-sensor array is transparent.
16. The light-sensor array system of claim 1 , wherein the light-sensor array is bendable.
17. The light-sensor array system of claim 1 , wherein wavelength-selective light-sensing opto-electronic elements employ a semiconducting band-gap to implement wavelength-selectivity.
18. The light-sensor array system of claim 1 , wherein the light-sensor array is provided with an ultra-violet (UV) light filter.
19. The light-sensor array system of claim 1 , wherein the light-sensor array is fabricated using printing methods.
20. The light-sensor array system of claim 1 , wherein the light-sensor array is implemented on a curved surface.
21. The light-sensor array system of claim 1 , wherein the light-sensor array comprises semiconductor materials which are deposited as semiconductor inks.