Projection device and projection-type video display device
US-9217879-B2 · Dec 22, 2015 · US
Image display device having laser light scanning with a variation in scanning speed
US9075246B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9075246-B2 |
| Application number | US-201113811576-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 11, 2011 |
| Priority date | Jul 23, 2010 |
| Publication date | Jul 7, 2015 |
| Grant date | Jul 7, 2015 |
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Abstract
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Techniques capable of effectively reducing local speckle noise caused by scanning with laser light involving a variation in scanning speed and improving the overall quality of an image are provided. In some examples, a laser light source emits laser light with an output level corresponding to a display grayscale of a pixel according to a predetermined waveform pattern within a pixel display period which is set to increase as a scanning speed is reduced. The waveform pattern is set such that a unique relaxation oscillation of the laser light source increases as the scanning speed is reduced. A scanning mirror reflects the laser light emitted from the laser light source in a predetermined scanning order according to its deflection angle so as to be projected onto a projection surface.
First claim
Opening claim text (preview).
The invention claimed is: 1. An image display device that displays an image on a projection surface using scanning with laser light involving a variation in scanning speed, comprising: a laser control unit that selects a first waveform pattern for generating a unique relaxation oscillation of a laser light source within a first pixel display period for a first pixel and selects a second waveform pattern for generating a larger number of relaxation oscillations than the first wavef…
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Physics · mapped topic
- G02B27/48Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9075246B2 cover?
- Techniques capable of effectively reducing local speckle noise caused by scanning with laser light involving a variation in scanning speed and improving the overall quality of an image are provided. In some examples, a laser light source emits laser light with an output level corresponding to a display grayscale of a pixel according to a predetermined waveform pattern within a pixel display per…
- Who is the assignee on this patent?
- Chikaoka Atsuhiko, Nagashima Kenji, Funai Electric Co
- What technology area does this patent fall under?
- Primary CPC classification G02B27/48. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 07 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).