Color imaging using array of wavelength-selective optoelectronic elements as light-field or image sensor and additionally capable of emitting light
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 pixel elements, each visible-band light-sensing pixel element comprising a plurality of wavelength-selective light-sensing opto-electronic elements having 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 wavelength-selective light-sensing opto-electronic elements having a different wavelength-selective electrical response characteristic from the other wavelength-selective light-sensing opto-electronic elements, the wavelength-selective response not resulting from wavelength-selective optical elements and configured to produce an electrical output responsive to an associated range of visible-band wavelengths,
signal processing responsive to the electrical output produced by each of the plurality of visible-band light-sensing pixel elements, the signal processing producing outgoing measurement signals corresponding to visible-band wavelength components incident on light-sensing regions of the light sensor array,
wherein the light-sensor array system is selectively responsive to visible-band light incident on the light-sensing region of each visible-band light-sensing pixel element.
2. The light-sensor array system of claim 1 , wherein the plurality of wavelength-selective light-sensing opto-electronic elements are adjacently located within each visible-band light-sensing pixel element.
3. The light-sensor array system of claim 1 , wherein the plurality of 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 plurality of 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 at least one of the plurality of measurement signals is arranged to respond linearly to variations in light amplitude for light of an individual wavelength.
6. The light-sensor array system of claim 1 , wherein the light-sensor array is configured to emit light.
7. 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.
8. The light-sensor array system of claim 1 , wherein some of the wavelength-selective light-sensing opto-electronic elements are light-emitting diodes (LEDs).
9. 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).
10. The light-sensor array system of claim 1 , wherein the light-sensor array can operate as a visual display.
11. The light-sensor array system of claim 1 , wherein the wavelength-selective light-sensing opto-electronic elements are transparent.
12. The light-sensor array system of claim 1 , wherein the wavelength-selective light-sensing opto-electronic elements are deposited on a transparent material.
13. The light-sensor array system of claim 1 , wherein the light-sensor array is transparent.
14. The light-sensor array system of claim 1 , wherein the light-sensor array is bendable.
15. 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.
16. The light-sensor array system of claim 1 , wherein the light-sensor array is provided with an ultra-violet (UV) light filter.
17. The light-sensor array system of claim 1 , wherein the light-sensor array is fabricated using printing methods.
18. The light-sensor array system of claim 1 , wherein the light-sensor array is implemented on a curved surface.
19. The light-sensor array system of claim 1 , wherein the light-sensor array comprises semiconductor materials which are deposited.
20. The light-sensor array system of claim 1 , wherein the signal processing comprises a color space transformation.