Optical arrangement comprising emitters and detectors on a common substrate

• US 8,274,034 B2
• Filed: 06/14/2007
• Issued: 09/25/2012
• Est. Priority Date: 06/23/2006
• Status: Active Grant

• Current Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Original Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Inventors: Vogel, Uwe, Amelung, Jorg, Kreye, Daniel
• Primary Examiner(s): Legasse, Jr., Francis M
• Application Number:
  US11/763,035
• Publication Number:
  US 20100012817A1
• Time in Patent Office: 1,930 Days
• Field of Search: 250/208.2, 250/208.1, 250/221, 250/216, 25023113-23118, 250/237.G, 250/214.1, 250/214.R, 257/431, 257/432, 257/433, 257/434, 257/435, 257/444, 359/74, 359/576, 359/579, 359/570, 359/571, 359/565, 359/656, 359/574
• US Class Current: 250/214.R
• CPC Class Codes: H01L 27/14678 Contact-type imagers
• CPC Class Codes: H01L 31/173 formed in, or on, a common substrate
• CPC Class Codes: H10K 59/13 comprising photosensors that control luminance
• CPC Class Codes: H10K 59/60 OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes

Abstract

The invention relates to optical arrangements which can be provided, preferably also in miniaturized form, for the most varied applications. They can be used in many sectors of life and also commercially, and indeed whenever information should be presented visually and/or optical information should be recognized and taken into account. It is the object of the invention to provide optical arrangements with which different optical information can be utilized in more complex form together in one arrangement. The optical arrangement in accordance with the invention is configured such that elements both emitting and detecting electromagnetic radiation are arranged on a common substrate or are configured thereat. A plurality of these elements are preferably present together in each case. It can, however, also be sufficient for specific applications to provide in each case an emitting or a detecting element with a plurality of the respective other elements.

Claims

1. An optical arrangement, comprising:

a plurality of emitting elements operable to emit electromagnetic radiation;

a plurality of detecting elements operable to detect electromagnetic radiation, and which are manufactured in CMOS technology integrally within a CMOS substrate; and

an electronic evaluation and control unit to which the emitting elements and the detecting elements are connected,

wherein;

(i) the emitting elements are arranged on a surface of the CMOS substrate, (ii) the emitting elements and the detecting elements are disposed discretely with respect to one another and next to one another such that they form an array arrangement together, the array arrangement operating to simultaneously display visual information, via the emitting elements, and detect optical information, via the detecting elements, and (iii) at least one of;

(a) the emitting elements and the detecting elements are arranged such that electromagnetic radiation incident from the light emitting elements is detected by the detecting elements, and (b) the emitting elements are transparent to electromagnetic radiation and are arranged above and covering the detecting elements.

2. An arrangement in accordance with claim 1, further comprising a housing that accommodates the optical arrangement, wherein the housing is transparent at least regionally for the electromagnetic radiation.

3. An arrangement in accordance with claim 1, wherein the emitting elements are configured as organic light emitting diodes.

4. An arrangement in accordance with claim 1, wherein the detecting elements are configured as photodiodes or CMOS sensors.

5. An arrangement in accordance with claim 1, wherein the emitting elements and the detecting elements are arranged and distributed uniformly over the total surface of the arrangement.

6. An arrangement in accordance with claim 1, wherein the emitting elements cover the detecting elements.

7. An arrangement in accordance with claim 1, wherein the emitting elements and the detecting elements are configured for electromagnetic radiation in a wavelength range of visible light.

8. An arrangement in accordance with claim 1, wherein the emitting elements and the detecting elements are configured for electromagnetic radiation in a wavelength range of near infrared light.

9. An arrangement in accordance with claim 1, wherein the CMOS substrate includes a CMOS structure.

10. An arrangement in accordance with claim 1, wherein the detecting elements are barrier layer photodetectors.

11. An arrangement in accordance with claim 1, wherein the emitting elements are operable to be controlled by means of signals detected by the detecting elements.

12. An arrangement in accordance with claim 1, wherein the detecting elements comprise elements which are sensitive in different wavelength regions.

13. An arrangement in accordance with claim 1, wherein the housing is operable to be placed on at least one eye of a living being.

14. An arrangement in accordance with claim 1, wherein electromagnetic radiation is operable to be emitted and detected alternatingly or sequentially.

15. A method, comprising detecting physiological parameters of living beings using the arrangement in accordance with claim 1.

16. A method, comprising interactively applying the arrangement in accordance with claim 1 in connection with information or physiological parameters detected by the detecting elements.

17. An arrangement in accordance with claim 1, wherein the surface of the common CMOS substrate is protected by a cover transparent to electromagnetic radiation.

18. An arrangement in accordance with claim 17, wherein optical structural elements associated with the emitting elements and/or the detecting elements are configured at the cover.

19. An arrangement in accordance with claim 18, wherein the optical structural elements are operable to focus or split electromagnetic radiation.

20. An arrangement in accordance with claim 13, wherein electromagnetic radiation emitted by the emitting elements is imaged on a transparent part of the housing.