Light source unit including luminescent wheel and color wheel, and projector
US-9843780-B2 · Dec 12, 2017 · US
Light source unit and projection apparatus
US10976650B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10976650-B2 |
| Application number | US-201816230856-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 21, 2018 |
| Priority date | Jan 9, 2018 |
| Publication date | Apr 13, 2021 |
| Grant date | Apr 13, 2021 |
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- Title
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- First independent claim
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Abstract
Official abstract text for this publication.
A light source unit includes: a first light emitting element configured to emit a first wavelength band light; a second light emitting element configured to emit a second wavelength band light; a luminescent wheel configured to have a first fluorescent light emitting region irradiated with the second wavelength band light to emit a third wavelength band light, and a second fluorescent light emitting region that emits a fourth wavelength band light including a wavelength band of the first wavelength band light and the third wavelength band light having a wavelength band adjacent to the first wavelength band light being provided in parallel in a circumferential direction; a color wheel configured to have a second transmissive region that transmits the first wavelength band light to the fourth wavelength band light, and a third transmissive region that transmits only the first wavelength band light or transmits only the first wavelength band light and the second wavelength band light being installed in parallel in the circumferential direction, and synchronously rotate with the luminescent wheel; and a controller configured to cause the second wavelength band light to be emitted in each output period and the first wavelength band light to be emitted in the output period in which the fourth wavelength band light is emitted, in a plurality of output periods in a frame.
First claim
Opening claim text (preview).
What is claimed is: 1. A light source unit comprising: a first light emitting element configured to emit a first wavelength band light; a second light emitting element configured to emit a second wavelength band light; a luminescent wheel configured to have a first fluorescent light emitting region irradiated with the second wavelength band light to emit a third wavelength band light, and a second fluorescent light emitting region that emits a fourth wavelength band light including a wavelength band of the first wavelength band light and the third wavelength band light having a wavelength band adjacent to the first wavelength band light being provided in parallel in a circumferential direction; a color wheel configured to have a second transmissive region that transmits the first wavelength band light to the fourth wavelength band light, and a third transmissive region that transmits only the first wavelength band light or transmits only the first wavelength band light and the second wavelength band light being installed in parallel in the circumferential direction, and synchronously rotate with the luminescent wheel; and a controller configured to cause the second wavelength band light to be emitted in each output period and the first wavelength band light to be emitted in the output period in which the fourth wavelength band light is emitted, in a plurality of output periods in a frame, wherein the controller is configured to cause the first wavelength band light and the fourth wavelength band light to be emitted by irradiating the second wavelength band light to the second fluorescent light emitting region, and; the luminescent wheel has a first transmissive region irradiated with the second wavelength band light to transmit the second wavelength band light. 2. The light source unit according to claim 1 , wherein the controller is configured to synchronously control the luminescent wheel and the color wheel by a first output mode including the output period in which the fourth wavelength band light is incident on the second transmissive region and the output period in which the fourth wavelength band light is incident on the third transmissive region, in the plurality of output periods in which the first wavelength band light is emitted. 3. The light source unit according to claim 1 , wherein the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the second transmissive region; a third output period in which the first wavelength band light and the fourth wavelength band light are incident on the third transmissive region; and a fourth output period in which the first wavelength band light and the fourth wavelength band light are incident on the second transmissive region. 4. The light source unit according to claim 2 , wherein the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the second transmissive region; a third output period in which the first wavelength band light and the fourth wavelength band light are incident on the third transmissive region; and a fourth output period in which the first wavelength band light and the fourth wavelength band light are incident on the second transmissive region. 5. The light source unit according to claim 1 , wherein the third transmissive region transmits the first wavelength band light and the second wavelength band light; and the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the third transmissive region; a third output period in which the first wavelength band light and the fourth wavelength band light are incident on the third transmissive region; and a fourth output period in which the first wavelength band light and the fourth wavelength band light are incident on the second transmissive region. 6. The light source unit according to claim 2 , wherein the third transmissive region transmits the first wavelength band light and the second wavelength band light; and the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the third transmissive region; a third output period in which the first wavelength band light and the fourth wavelength band light are incident on the third transmissive region; and a fourth output period in which the first wavelength band light and the fourth wavelength band light are incident on the second transmissive region. 7. The light source unit according to claim 1 , wherein the third transmissive region transmits the first wavelength band light and the second wavelength band light; and the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the second transmissive region; and a third output period and a fourth output period in which the first wavelength band light and the fourth wavelength band light are incident on the third transmissive region. 8. The light source unit according to claim 2 , wherein the third transmissive region transmits the first wavelength band light and the second wavelength band light; and the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the second transmissive region; and a third output period and a fourth output period in which the first wavelength band light and the fourth wavelength band light are incident on the third transmissive region. 9. The light source unit according to claim 3 , wherein the third transmissive region transmits the first wavelength band light and the second wavelength band light; and the output period includes: a first output period in which the first wavelength band light is put out and the third wavelength band light is incident on the second transmissive region; a second output period in which the first wavelength band light is put out and the second wavelength band light that has transmitted through the first transmissive region is incident on the second transmissive region; and a third output period and a fourth output period in which the first wavelength band light and
Assignees
Inventors
Classifications
Field-sequential colour display · CPC title
Details of control of colour illumination sources · CPC title
for control of overall brightness · CPC title
- G02B26/008Primary
in the form of devices for effecting sequential colour changes, e.g. colour wheels · CPC title
Plural light sources · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10976650B2 cover?
- A light source unit includes: a first light emitting element configured to emit a first wavelength band light; a second light emitting element configured to emit a second wavelength band light; a luminescent wheel configured to have a first fluorescent light emitting region irradiated with the second wavelength band light to emit a third wavelength band light, and a second fluorescent light emi…
- Who is the assignee on this patent?
- Casio Computer Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B26/008. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 13 2021 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).