Light source apparatus, discharge lamp driving method, and projector
US-9526157-B2 · Dec 20, 2016 · US
Discharge lamp operating apparatus
US9055656B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9055656-B2 |
| Application number | US-201314064049-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 25, 2013 |
| Priority date | Oct 25, 2012 |
| Publication date | Jun 9, 2015 |
| Grant date | Jun 9, 2015 |
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Abstract
Official abstract text for this publication.
A discharge lamp operating apparatus including: a discharge lamp; an operating circuit; a voltage measuring unit; a magnetic field applying unit; and a control unit, wherein the voltage measuring unit measures the voltage of power at sampling intervals, the control unit calculates an average value VL 1 of a group of the measured value of the voltage as a standard and an average value VL 2 of a group of the measured value of the voltage for comparison after a predetermined time has elapsed from the measurement of the measured value of the voltage measured at the beginning from the group of the measured value of the voltage as a standard, and when the difference (VL 2 −VL 1 ) between the average value VL 1 and the average value VL 2 exceeds a predetermined value, drives the magnetic field applying unit.
First claim
Opening claim text (preview).
What is claimed is: 1. A discharge lamp operating apparatus comprising: a discharge lamp for discharging lights in a horizontal direction; an operating circuit configured to supply power to the discharge lamp; a voltage measuring unit configured to measure a voltage of power supplied to the discharge lamp; a magnetic field applying unit configured to suppress a phenomenon of the arc curving on the upper side occurring in the discharge lamp; and a control unit configured to…
Assignees
Inventors
Classifications
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
Cross-Sectional Technologies · mapped topic
- H05B41/2928Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9055656B2 cover?
- A discharge lamp operating apparatus including: a discharge lamp; an operating circuit; a voltage measuring unit; a magnetic field applying unit; and a control unit, wherein the voltage measuring unit measures the voltage of power at sampling intervals, the control unit calculates an average value VL 1 of a group of the measured value of the voltage as a standard and an average value VL 2 of …
- Who is the assignee on this patent?
- Ushio Electric Inc
- What technology area does this patent fall under?
- Primary CPC classification H05B41/2928. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 09 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).