Selective system for blocking glare in a specific location of a user's field of vision

• US 7,651,220 B1
• Filed: 11/06/2006
• Issued: 01/26/2010
• Est. Priority Date: 11/07/2005
• Status: Active Grant

• Current Assignee: PH Technical Labs
• Original Assignee: Ram Pattikonda
• Inventors: Pattikonda, Ram
• Primary Examiner(s): Collins; Darryl J
• Application Number:
  US11/556,779
• Time in Patent Office: 1,177 Days
• Field of Search: 351163-165
• US Class Current: 351/163
• CPC Class Codes: G02C 7/101 having an electro-optical light valve electro-optical elements per se G02F

Abstract

A glare blocking system for selectively blocking specified glare spots. The system includes a transmission control material for selectively darkening a portion of the material and an electronics module for commanding the transmission control material to darken a specified area of the transmission control material. The system also includes a power source providing power to the electronic module and the transmission control material. The electronics module determines the specified area to be darkened upon the transmission control material to block a detected glare spot from view by a user. When a glare spot is detected, the specified area to be darkened corresponding to a detected glare spot is determined and the electronic module directs the specified area of the transmission control material to be darkened to block the detected glare spot from view by the user. In one embodiment, the glare blocking system includes a camera to capture an image seen through the transmission control material. Glare spots may then be detected on the captured image. The system may be used on goggles, visors, mirrors or as a panel having separate manual controls to select the areas to darken.

Claims

1. A glare blocking system for selectively blocking specified glare spots, the system comprising:

a transmission control material for selectively darkening a portion of the material;

an electronic module for commanding the transmission control material to darken a specified area of the transmission control material;

a power source providing power to the electronic module and the transmission control material;

means for determining the specified area upon the transmission control material to block a detected glare spot from view by a user, wherein the electronic module using the user'"'"'s eye position, position of the transmission control material and the camera to determine the specific area upon the transmission control material to block the detected glare; and

means for calibrating an eye position of the user in relation to the transmission control material, the means for calibrating an eye position of the user includes using a substantially static object seen through the transmission control material and manually moving the specified area to darken to block the static object and extrapolating the position of the static object as seen from the camera thereby aligning the transmission control material relative to the eyes of the user;

whereby the specified area to be darkened corresponding to a detected glare spot is determined and the electronic module directs the specified area of the transmission control material to be darkened to block the detected glare spot from view by the user.

2. The glare blocking system of claim 1 wherein:

the transmission control material is two separate lenses within goggles;

the means for determining the specified area upon the transmission control material includes a camera for capturing an image and detecting a glare spot on the image; and

the electronic module maps the detected glare spot on each lens, the mapped glare spot being the specified area to be darkened to block the detected glare spot from view by the user of the goggles, wherein each lens independently blocks glare spots from each eye of the user.

3. The glare blocking system of claim 2 wherein the detected glare spot is mapped on each lens using perspective geometric techniques.

4. The glare blocking system of claim 1 further comprising means for calibrating an eye position of the user in relation to the transmission control material, the means for calibrating an eye position of the user includes a calibration plate positioned adjacent the transmission control material, the calibration plate having alignment marks for aligning the transmission control relative to eyes of the user.

5. The glare blocking system of claim 1 wherein:

the means for determining the specified area upon the transmission control material includes;

using a histogram to detect glare upon the captured image;

utilizing the histogram to equalize the non-uniform brightness of the detected glare.

6. The glare blocking system of claim 1 wherein:

the transmission control material is a viewing panel on a visor;

the means for determining the specified area upon the transmission control material includes a camera for capturing an image and detecting a glare spot on the image; and

the electronic module maps the detected glare spot on the panel, the mapped glare spot being the specified area to be darkened to block the detected glare spot from view by a user of the visor.

7. The glare blocking system of claim 6 wherein the detected glare spot is mapped on the panel using perspective geometric techniques.

8. The glare blocking system of claim 6 further comprising means for calibrating an eye position of the user in relation to the transmission control material, the means for calibrating an eye position of the user includes using a substantially static object seen through the transmission control material and manually moving the specified area to darken to block the static object and extrapolating the position of the static object as seen from the camera, thereby aligning the transmission control material relative to the eyes of the user.

9. The glare blocking system of claim 6 further comprising a second camera for tracking an eye position of the user.

10. The glare blocking system of claim 1 wherein:

the transmission control material is a viewing panel and includes a manual control to darken the specified area, whereby the user selects the specified area to darken.

11. The glare blocking system of claim 10 wherein the viewing panel is a touch-screen.

12. The glare blocking system of claim 1 wherein:

the transmission control material is a mirror;

the means for determining the specified area upon the transmission control material includes a camera for capturing an image and detecting a glare spot on the image and

the electronic module maps the detected glare spot on the mirror, the mapped glare spot being the specified area to be darkened to block the detected glare spot from view by a user of the mirror.

13. The glare blocking system of claim 12 wherein the detected glare spot is mapped on a mirror using perspective geometric techniques.

14. The glare blocking system of claim 12 further comprising a second camera for tracking an eye position of the user.

15. The glare blocking system of claim 1 wherein the transmission control material is utilized in a cockpit of an aircraft.

16. A method of selectively blocking specified glare spots, the method comprising the steps of:

capturing an image by a camera;

conducting a histogram analysis of the capture image to determine a glare spot on the image;

mapping a determined glare spot on a transmission control material utilizing the histogram analysis to equalize the non-uniform brightness of the image;

computing a specified area to darken to block the glare spot on the transmission control material from view by a user; and

sending a control signal by an electronics module to darken the specified area to block the glare spot from view by the user.

17. The method of selectively blocking specified glare spots of claim 16 wherein the transmission control material includes two lenses of goggles, wherein each lens independently blocks glare spots from each eye of the user.

18. The method of selectively blocking specified glare spots of claim 16 wherein the transmission control material is a visor.

19. The method of selectively blocking specified glare spots of claim 16 wherein the transmission control material is a mirror.

20. The method of selectively blocking specified glare spots of claim 16 wherein the transmission control material displays information by darkening areas around information displayed on the transmission control material.

21. The method of selectively blocking specified glare spots of claim 16 wherein the transmission control material is selectively darkened at different grayscales to create a more uniform image.

22. The method of selectively blocking specified glare spots of claim 16 wherein the transmission control material is manually adjusted in intensity and color.

23. The method of selectively blocking specified glare spots of claim 16 further comprising the step of tracking a position of the user'"'"'s eye using shape analysis to find the shape of the user'"'"'s eye in the user'"'"'s field of vision.

24. The method of selectively blocking specified glare spots of claim 16 further comprising the step of illuminating a pupil of the user'"'"'s eye to generate a red eye on the user to track the position of the user'"'"'s eyes.

25. The method of selectively blocking specified glare spots of claim 16 further comprising the step of utilizing fixed mapping to approximate a position of the user'"'"'s eye relative to the transmission control material.