Signalling apparatus and sensor apparatus
US-9224317-B2 · Dec 29, 2015 · US
Non-linear current IDAC with synthesis in time domain
US9307590B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9307590-B2 |
| Application number | US-201414471099-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 28, 2014 |
| Priority date | Aug 28, 2014 |
| Publication date | Apr 5, 2016 |
| Grant date | Apr 5, 2016 |
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Abstract
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An electrical current (“I”) digital-to-analog converter (“IDAC”) ( 60 ) supplies a specified electrical current to at least one light emitting diode. The IDAC ( 60 ) includes a plurality of current sources/sinks ( 26 ): a. that are connected in parallel so a total amount of current flowing through the at least one LED equals the sum of their individual electrical currents; and b. at any instant in time individual current sources/sinks ( 26 ) are either: 1. turned on: or 2. turned off. When the specified electrical current being supplied exceeds a pre-established threshold ( 94 ), a sequence of individual current sources/sinks ( 26 ) are turned on ever more quickly to produce a. non-linearly increasing electrical current. When the specified electrical current being supplied is below the pre-established current threshold ( 94 ), the non-linearly increasing electrical current is supplied by an increasing number of additional current sources/sinks ( 26 ), each additional current source/sink ( 26 ) producing progressively longer current pulses until that current source/sink { 26 } remains fully on.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for supplying a specified electrical current to at least one light emitting diode (“LED”) included in a display from a current (“I”) digital-to-analog converter (“IDAC”) ( 60 ), the IDAC ( 60 ) including a plurality of individual current sources/sinks ( 26 ): a. for connecting in parallel to the LED so that a total amount of electrical current flowing through the LED equals the sum of individual electrical currents respectively flowing through each…
Assignees
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H05B33/0809Primary
Electricity · mapped topic
- H03M1/747Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9307590B2 cover?
- An electrical current (“I”) digital-to-analog converter (“IDAC”) ( 60 ) supplies a specified electrical current to at least one light emitting diode. The IDAC ( 60 ) includes a plurality of current sources/sinks ( 26 ): a. that are connected in parallel so a total amount of current flowing through the at least one LED equals the sum of their individual electrical currents; and b. at any instant…
- Who is the assignee on this patent?
- Negru Sorin Laurentiu, Cetin Sule, Mekara Parinda, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0809. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 05 2016 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).