Precision color-controlled light source
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 14, 2017
Issued Date -
N/A
app pub date -
May 13, 2016
filing date -
May 14, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A color-controlled light source includes a plurality of light emitting diodes, the light emitting diodes being configured to emit different colors of light, intensity of the light emitted by the light emitting diodes being selectably adjustable. A sensor receives the light emitted by the light emitting diodes and converts the received light to electrical feedback signals corresponding to the emitted light. A processor generates an electrical reference signal. An amplifier receives the reference signal and the feedback signal, compares the feedback signal and the reference signal, and generates an error signal corresponding to a difference between the feedback signal and the reference signal. A current control receives the error signal and adjusts the intensity of at least one light emitting diode to cancel the error signal. A composite color emitted by the plurality of light emitting diodes has a predetermined, closed-loop controlled chromaticity.
First Claim
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Family
- No Family data available.
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
HUGHEY & PHILLIPS LLC | 240 WEST TWAIN AVENUE URBANA OH 43078 |
International Classification(s)

- 2016 Application Filing Year
- H05B Class
- 3665 Applications Filed
- 2767 Patents Issued To-Date
- 75.50 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Mula, Richard C | Westlake Village, US | 3 | 18 |
# of filed Patents : 3 Total Citations : 18 | |||
Ricca, Steven V | Upper Arlington, US | 9 | 44 |
# of filed Patents : 9 Total Citations : 44 |
Cited Art Landscape
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Patent Citation Ranking
- 7 Citation Count
- H05B Class
- 22.53 % this patent is cited more than
- 8 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 14, 2028 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
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May 14, 2021 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4 |
Nov 14, 2017 | I | Issuance | |
Oct 25, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Sep 11, 2014 | P | Published | |
Mar 05, 2013 | F | Filing | |
Mar 05, 2013 | PD | Priority Date | |
Mar 04, 2013 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BYNUM, ANTHONY EUGENE;JOHNSON, BRADLEY THOMAS;REEL/FRAME:029922/0725 Owner name: RTC INDUSTRIES, INC., ILLINOIS Effective Date: Mar 04, 2013 |

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