Method and apparatus for identifying a sensed light environment

• US 7,684,029 B2
• Filed: 10/29/2004
• Issued: 03/23/2010
• Est. Priority Date: 10/29/2004
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Yamai, Masatoshi, Chen, Deng-Peng, Tan, Wee-Sin
• Primary Examiner(s): NGUYEN, SANG H
• Application Number:
  US10/977,958
• Publication Number:
  US 20060092407A1
• Time in Patent Office: 1,971 Days
• Field of Search: 356213-232, 356315-320, 250/339.01, 250/339.02, 250/339.05, 250/339.07, 250/339.11, 250/339.12, 250/339.15, 430/7, 430/578, 345/172, 345/175
• US Class Current: 356/221
• CPC Class Codes: G01J 3/28 Investigating the spectrum using colour filters G01J3/51
• CPC Class Codes: G01J 3/36 Investigating two or more bands of a spectrum by separate detectors

Abstract

In one embodiment, a sensed dataset includes data produced by a plurality of light sensors that have been exposed to a light environment. The data of the sensed dataset corresponds to different ranges of light, and at least a portion of one of the ranges of light is outside the visible (VIS) light spectrum. The sensed dataset is compared to a plurality of known datasets representative of known light environments, and at least one known dataset that is similar to the sensed dataset is identified. In response thereto, an indication of the sensed light environment is provided. Apparatus for implementing this and related methods is also disclosed. In some embodiments, the light sensors are ultraviolet, visible and infrared sensors, and the indication of the sensed light environment is used to control the color of data acquired by an image sensor, or the color of a display backlight.

Claims

1. Apparatus, comprising:

a plurality of light sensors, each sensitive to a different range of light, and at least a portion of one of the ranges of light being outside the visible (VIS) light spectrum, the light sensors being configured to produce data defining a sensed dataset in response to being exposed to a light environment;

a memory to store a plurality of known datasets representative of known light environments; and

a controller to i) search the memory to identify at least one known dataset similar to the sensed dataset, and ii) in response to the identified known dataset(s), provide an output indicative of the sensed light environment.

2. The apparatus of claim 1, wherein the plurality of light sensors comprises an ultraviolet (UV) sensor, a VIS sensor, and an infrared (IR) sensor.

3. The apparatus of claim 2, wherein the IR sensor comprises a component of an IR transceiver.

4. The apparatus of claim 1, wherein the known datasets are normalized, and wherein the controller is further configured to normalize the sensed dataset before searching the memory.

5. The apparatus of claim 1, wherein the known datasets are associated with control parameters, and wherein the controller output indicative of the sensed light environment comprises the control parameters associated with a single, identified, known dataset.

6. The apparatus of claim 1, wherein the known datasets are associated with control parameters, and wherein, when the controller identifies at least two known datasets similar to the sensed dataset, the controller output indicative of the sensed light environment is based on an interpolation between the control parameters associated with the identified known datasets.

7. The apparatus of claim 1, further comprising an image sensor color compensation system, wherein the output indicative of the sensed light environment is provided to the image sensor color compensation system.

8. The apparatus of claim 1, further comprising a display backlight color compensation system, wherein the output indicative of the sensed light environment is provided to the display backlight color compensation system.

9. The apparatus of claim 8, further comprising an image sensor color compensation system, wherein the output indicative of the sensed light environment is provided to the image sensor color compensation system.

10. The apparatus of claim 1, wherein at least one of the known datasets corresponds to a light environment indicative of an emergency condition.

11. A method for identifying a sensed light environment, comprising:

receiving a sensed dataset comprised of data produced by a plurality of light sensors that have been exposed to a light environment, the data of the sensed dataset corresponding to different ranges of sensed light, and at least a portion of one of the ranges of light being outside the visible (VIS) light spectrum;

comparing the sensed dataset to a plurality of known datasets representative of known light environments;

identifying at least one known dataset that is similar to the sensed dataset and, in response thereto, providing an indication of the sensed light environment; and

using said indication of the sensed light environment to influence backlighting of a display.

12. The method of claim 11, wherein the data of the sensed dataset corresponds to ultraviolet (UV), visible, and infrared (IR) ranges of light.

13. The method of claim 11, wherein the known datasets are normalized, the method further comprising normalizing the sensed dataset before comparing it to the known datasets.

14. The method of claim 11, wherein the known datasets are associated with control parameters, and wherein, when the method identifies at least two known datasets similar to the sensed dataset, the method further comprises:

interpolating between the control parameters associated with the identified known datasets; and

providing interpolated control parameters as said indication of the sensed light environment.

15. The method of claim 11, further comprising, using said indication of the sensed light environment to provide an alert of an emergency condition.

16. A program storage device storing machine executable instructions for performing operations comprising:

receiving a sensed dataset comprised of data produced by a plurality of light sensors that have been exposed to a light environment, the data of the sensed dataset corresponding to different ranges of sensed light, and at least a portion of one of the ranges of light being outside the visible (VIS) light spectrum;

comparing the sensed dataset to a plurality of known datasets representative of known light environments; and

identifying at least one known dataset that is similar to the sensed dataset, and in response thereto, controlling a feature of a portable device.