Ambient light optics for head mounted display
US-9223152-B1 · Dec 29, 2015 · US
Method of detecting and controlling perceptual flicker
US8937271B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937271-B2 |
| Application number | US-201313737998-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 10, 2013 |
| Priority date | Apr 5, 2007 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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A method and apparatus are provided for processing light from a light source. The method includes the steps of measuring a predetermined set of characteristics of the light source and detecting flicker when the predetermined set of characteristics exceed a corresponding flicker fusion threshold value.
First claim
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The invention claimed is: 1. A method comprising: measuring frequency and duty cycle of a light source operating in a frequency range between 0 Hertz and above 120 Hertz; a threshold processor identifying a flicker fusion threshold condition corresponding to the measured frequency and duty cycle of the light source where the flicker fusion threshold condition has a respective frequency value and duty cycle value and where the value of one of the frequency and duty cycle of the f…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8937271B2 cover?
- A method and apparatus are provided for processing light from a light source. The method includes the steps of measuring a predetermined set of characteristics of the light source and detecting flicker when the predetermined set of characteristics exceed a corresponding flicker fusion threshold value.
- Who is the assignee on this patent?
- Macknik Stephen L, Dignity Health
- What technology area does this patent fall under?
- Primary CPC classification G01J1/32. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 20 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).