# US 2012/0075596 A1 · High efficiency illumination

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- Number: US 2012/0075596 A1
- Document ID: US20120075596A1
- Status: Published application
- Kind: A1
- Application number: 12/890,180
- Filed: 2010-09-24
- Published: 2012-03-29
- Earliest claimed: 2010-09-24
- Inventors: Eric C. Hannah; John L. Gustafson
- Web page: https://patentgrep.com/patent/US20120075596A1

## CPC

- H05B 47/175: by remote control
- H05B 45/30: Driver circuits
- H05B 47/198: {Grouping of control procedures or address assignation to light sources}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

An electronic device comprises a processor, a light source, and a controller coupled to the light source. The controller comprises logic to cycle the light source between an active state and an inactivate state at with a pulse duration that measures between 30 milliseconds and 100 milliseconds and jitter a time onset of the active state by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles. Other embodiments may be described.

## Claims

### Claim 1

An apparatus, comprising:
a controller to control a light source, wherein the controller comprises logic to:
cycle the light source between an active state and an inactivate state with a pulse duration that measures between 30 milliseconds and 100 milliseconds; and
jitter a time onset of the active state by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles.

### Claim 2 (depends on 1)

The illumination system of claim 1, wherein the light source comprises at least one light emitting diode (LED).

### Claim 3 (depends on 1)

The illumination system of claim 1, further comprising a projection assembly to project light from the illumination system onto a stimulus region.

### Claim 4 (depends on 1)

The illumination system of claim 1, wherein:
the controller further comprises logic to:
subdivide a stimulus region into a plurality of spatial regions; and
independently jitter the time offset of multiple spatial regions by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles.

### Claim 5 (depends on 4)

The illumination system of claim 4, wherein the plurality of spatial regions defines a plurality of overlapping shapes.

### Claim 6 (depends on 3)

The illumination system of claim 3, wherein the controller is operable to generate a moving image for projection onto the stimulus region.

### Claim 7

An electronic device, comprising:
a processor;
a light source; and
a controller coupled to the light source, wherein the controller comprises logic to:
cycle the light source between an active state and an inactivate state at with a pulse duration that measures between 30 milliseconds and 100 milliseconds; and
jitter a time onset of the active state by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles.

### Claim 8 (depends on 7)

The electronic device of claim 7, wherein the light source comprises at least one light emitting diode (LED).

### Claim 9 (depends on 7)

The electronic device of claim 7, further comprising a projection assembly to project light from the light source onto a stimulus region.

### Claim 10 (depends on 9)

The electronic device of claim 9, wherein:
the controller further comprises logic to:
subdivide a stimulus region into a plurality of spatial regions; and
independently jitter the time offset of multiple spatial regions by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles.

### Claim 11 (depends on 10)

The electronic device of claim 10, wherein the plurality of spatial regions define a plurality of overlapping shapes.

### Claim 12 (depends on 9)

The electronic device of claim 9, wherein the light source is operable to generate a moving image for projection onto the stimulus region.

### Claim 13

A method, comprising:
cycling a light source between an active state and an inactivate state with a pulse duration that measures between 30 milliseconds and 100 milliseconds; and
jittering a time onset of the active state by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles.

### Claim 14 (depends on 13)

The method of claim 13, wherein the light source comprises at least one light emitting diode (LED).

### Claim 15 (depends on 13)

The method of claim 13, further comprising projecting light onto a stimulus region.

### Claim 16 (depends on 15)

The method of claim 15, further comprising:
subdividing the stimulus region into a plurality of spatial regions; and
independently jittering the time offset of multiple spatial regions by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles.

### Claim 17 (depends on 16)

The method of claim 16, wherein the plurality of spatial regions defines a plurality of overlapping shapes.

### Claim 18 (depends on 15)

The method of claim 15, wherein the light source generates a moving image for projection onto the stimulus region.