Illumination apparatus

Patent metadata

Field	Value
Publication number	US-9654703-B2
Application number	US-201414480086-A
Country	US
Kind code	B2
Filing date	Sep 8, 2014
Priority date	Sep 8, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

One example discloses an illumination apparatus, including: a first illumination source, having a pulsed illumination output structure; and a capture sensor, having an image capture structure synchronized with and responsive to reflection signals generated by the pulsed illumination output signal structure. Another example discloses an article of manufacture including at least one non-transitory, tangible machine readable storage medium containing executable machine instructions for illumination which include: transmitting a first pulsed illumination signal from a first illumination source; capturing an image; and synchronizing the transmitting and capturing with a synchronization trigger.

First claim

What is claimed is:

1. An illumination apparatus, comprising:
a synchronization control having a trigger signal output;
a first illumination source, having a pulsed illumination output structure configured to transmit a first set of pulsed illumination signals at a first frequency in response to a trigger signal on the trigger signal output; and
a capture sensor, having an image capture structure configured to capture a first set of images, in response to the trigger signal, wherein the first set of captured images comprises reflection signals at the first frequency generated by the first set of pulsed illumination signals reflecting off of an object and a set of spurious signals at a second frequency generated by a second illumination source and detect the object using the reflection signals at the first frequency when power of the reflection signals exceeds a predetermined threshold power level based upon an illumination pulse width and an illumination pulse frequency.

2. The apparatus of claim 1 , wherein the synchronization control further comprises:
a trigger circuit configured to activate the pulsed illumination output structure in response to a capture signal from the image capture structure.

3. The apparatus of claim 1 , wherein the synchronization control further comprises:
a trigger circuit configured to activate the image capture structure in response to a pulse signal from the pulsed illumination output structure.

4. The apparatus of claim 2 , wherein the image capture structure further comprises a shutter; and the trigger circuit is configured to activate the shutter.

5. The apparatus of claim 1 , wherein the image capture structure has an image capture frame rate and the pulsed illumination output structure has a pulsed illumination frame rate which is less than the image capture frame rate.

6. The apparatus of claim 1 , wherein the illumination source is an infrared source.

7. The apparatus of claim 1 , wherein the capture sensor is an infrared sensor.

8. The apparatus of claim 1 , wherein the illumination apparatus is embodied in at least one of: a wearable device, a security system, a driver warning system, a driving assistance system, an autonomous driving system, a robotics system, or an Advanced Driving Assistance System (ADAS) system.

9. An article of manufacture comprises at least one non-transitory, tangible machine readable storage medium containing executable machine instructions for illumination which comprise:
instructions for generating a synchronization trigger signal;
instructions for transmitting a first set of pulsed illumination signals from a first illumination source at a first frequency, in response to the synchronization trigger signal;
instructions for capturing a first set of images, in response to the synchronization trigger signal, wherein the first set of captured images include a first set of reflection signals at the first frequency generated by the first set of pulsed illumination signals reflecting off of an object and a set of spurious signals at a second frequency generated by a second illumination source; and
instructions for detecting the object using the reflection signals at the first frequency when power of the first set of reflection signals exceeds a predetermined threshold power level based upon an illumination pulse width and an illumination pulse frequency.

10. The article of manufacture of claim 9 , wherein the pulsed illumination signal is an infrared signal.

11. The article of manufacture of claim 9 , further comprising:
instructions for generating the synchronization trigger signal in response to the first set of pulsed illumination signals.

12. The article of manufacture of claim 9 , further comprising:
instructions for generating the synchronization trigger signal in response to capturing the first set of images.

13. The article of manufacture of claim 9 , further comprising:
instructions for capturing the first set of images at a first frame rate; and
instructions for transmitting the first set of pulsed illumination signals at a second frame rate, wherein the second frame rate is less than the first frame rate.

14. The article of manufacture of claim 9 , further comprising:
instructions for transmitting a second set of pulsed illumination signals from the first illumination source at the first frequency;
instructions for capturing a second set of images, wherein the second set of captured images include a second set of reflection signals generated by the second set of pulsed illumination signals reflecting off of the object, but do not include the set of spurious signals.

15. The instructions of claim 9 , wherein the set of spurious signals include at least one of: an illumination signal directly from the second illumination source, or a reflection signal indirectly from the second illumination source.

16. The instructions of claim 9 , wherein the reflection signals and spurious signals are not in a same one of the first set of captured images.

17. The apparatus of claim 6 , wherein the infrared source is a near infrared source having a wavelength between 800-900 nm.

18. The apparatus of claim 7 , wherein the infrared sensor is configured to detect energy having a wavelength between 800-900 nm.

19. The article of manufacture of claim 10 , wherein the infrared signal is a near infrared signal having a wavelength between 800-900 nm.

Assignees

• Nxp Bv

Inventors

• Daalderop Gerardo Henricus Otto
• Raaijmakers Han

Classifications

• G02B23/12 Primary

  with means for image conversion or intensification · CPC title

• H04N23/56

  provided with illuminating means · CPC title

• H04N23/20

  for generating image signals from infrared radiation only · CPC title

• H04N5/33 Primary

  Transforming infrared radiation (cameras or camera modules for generating image signals from infrared radiation H04N23/20; circuitry of SSIS for transforming infrared radiation into image signals H04N25/20) · CPC title

• G01S17/89 Primary

  for mapping or imaging · CPC title