Two-piece LCD projection device with light filter function and projection method thereof
US-12140854-B1 · Nov 12, 2024 · US
Projector and control method of the same
US8960922B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8960922-B2 |
| Application number | US-201213541375-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2012 |
| Priority date | Jul 5, 2011 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A projector that performs light control by varying power level of a light source in response to a video signal, includes a cooling fan that cools the light source, and a control device that averages samples of the power level of the light source based on the video signal or a brightness level of the video signal acquired with respect to each unit time and performs feedback control of a rotational speed of the cooling fan based on the average value, wherein the control device varies the number of samples and calculates the average value between the cases where the power level or the brightness level is rising and falling.
First claim
Opening claim text (preview).
What is claimed is: 1. A projector that performs light control by varying power level of a light source in response to a video signal, the projector comprising: a lamp including the light source; a light modulation device configured to modulate illumination light from the light source in response to image information; a cooling fan configured to cool the light source; and a control device configured to average samples of the power level of the lamp based on the video signal…
Assignees
Inventors
Classifications
Physics · mapped topic
Physics · mapped topic
- G03B21/16Primary
Physics · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8960922B2 cover?
- A projector that performs light control by varying power level of a light source in response to a video signal, includes a cooling fan that cools the light source, and a control device that averages samples of the power level of the light source based on the video signal or a brightness level of the video signal acquired with respect to each unit time and performs feedback control of a rotation…
- Who is the assignee on this patent?
- Hino Shunsuke, Seiko Epson Corp
- What technology area does this patent fall under?
- Primary CPC classification G03B21/16. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 24 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).