Two-piece LCD projection device with light filter function and projection method thereof
US-12140854-B1 · Nov 12, 2024 · US
Projection display apparatus and control method therefor
US9201293B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9201293-B2 |
| Application number | US-201013813878-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 19, 2010 |
| Priority date | Aug 19, 2010 |
| Publication date | Dec 1, 2015 |
| Grant date | Dec 1, 2015 |
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- Title
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Abstract
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A projection display apparatus includes: a display element that displays an image; a lamp that illuminates the display element to cause the display element to emit an image light; a variable light intensity element that allows the light emitted from the lamp to pass therethrough, the intensity of light passing through the variable light intensity element being variable; and a light intensity controller that determines whether the display element is at an image mute state in which a full-black image is displayed, or at a normal lighting state other than the image mute state, and when the display element is at the image mute state, reduces the amount of power supplied to the lamp to a level that is lower than that of the normal lighting state to decrease the intensity of light emitted from the lamp, and also decreases the intensity of light that passes through the variable light intensity element.
First claim
Opening claim text (preview).
The invention claimed is: 1. A projection display apparatus projecting an image light based on an image, comprising: a display element that displays said image; a lamp that illuminates said display element to cause said display element to emit said image light; a variable light intensity element that allows the light emitted from said lamp to pass therethrough, the intensity of light passing through the variable light intensity element being variable; and a light intensity c…
Assignees
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Classifications
- G03B21/14Primary
Physics · mapped topic
- G03B21/2053Primary
Physics · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9201293B2 cover?
- A projection display apparatus includes: a display element that displays an image; a lamp that illuminates the display element to cause the display element to emit an image light; a variable light intensity element that allows the light emitted from the lamp to pass therethrough, the intensity of light passing through the variable light intensity element being variable; and a light intensity co…
- Who is the assignee on this patent?
- Shioya Yukinori, Tanaka Hiroki, Kanzaka Kenji, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G03B21/14. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 01 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).