Momentary night light assembly
First Claim
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1. A night light assembly containing a multiple LED light source and an electronic circuit, wherein said night light assembly is in a space normally lit by any ambient light;
- and said multiple LED light source is operatively controlled by said electronic circuit to produce a light output from said night light assembly;
whereby said light output has a time varying intensity and a time varying light spectrum; and
where said light output is initially a higher intensity photopic light output and then changes to a lower intensity scotopic light output during a first time period;
where said first time period is less than or equal to the time period required by a normal human eye to adjust from photopic vision to scotopic vision following exposure of said human eye to a sudden reduction of an ambient light;
said multiple LED light source is first turned on by said electronic circuit in response to a light-to-dark transition of said ambient light to initially produce said higher intensity photopic light output;
said electronic circuit then gradually changes said higher intensity photopic light output from said multiple LED light source to said lower intensity scotopic light output during a said first time period;
said lower intensity scotopic light output remains on during a second time period following said first time period until said electronic circuit senses a dark-to-light transition of said ambient light, after which said electronic circuit turns off said multiple LED light source.
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Abstract
This invention is a night light assembly containing a multiple LED light source and an electronic controller whereby the electronic controller causes the multiple LED light source to continually change its light output from a high intensity photopic light output to a low intensity scotopic light output in response to a transition from light to dark of an ambient light, matching a human eye response to a sudden decrease in ambient light.
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Citations
14 Claims
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1. A night light assembly containing a multiple LED light source and an electronic circuit, wherein said night light assembly is in a space normally lit by any ambient light;
- and said multiple LED light source is operatively controlled by said electronic circuit to produce a light output from said night light assembly;
whereby said light output has a time varying intensity and a time varying light spectrum; and
where said light output is initially a higher intensity photopic light output and then changes to a lower intensity scotopic light output during a first time period;
where said first time period is less than or equal to the time period required by a normal human eye to adjust from photopic vision to scotopic vision following exposure of said human eye to a sudden reduction of an ambient light;
said multiple LED light source is first turned on by said electronic circuit in response to a light-to-dark transition of said ambient light to initially produce said higher intensity photopic light output;
said electronic circuit then gradually changes said higher intensity photopic light output from said multiple LED light source to said lower intensity scotopic light output during a said first time period;
said lower intensity scotopic light output remains on during a second time period following said first time period until said electronic circuit senses a dark-to-light transition of said ambient light, after which said electronic circuit turns off said multiple LED light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- and said multiple LED light source is operatively controlled by said electronic circuit to produce a light output from said night light assembly;
Specification