Eye glint imaging in see-through computer display systems
US-10579140-B2 · Mar 3, 2020 · US
Image device with a compact homogenizer
US11598971B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11598971-B2 |
| Application number | US-202016798951-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 24, 2020 |
| Priority date | Jun 21, 2017 |
| Publication date | Mar 7, 2023 |
| Grant date | Mar 7, 2023 |
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- Title
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- Abstract
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Abstract
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A compact light source for a projection display is disclosed enabling eye-glass display using a Fresnel mirror reflecting light without a distance as conventional prism type reflector.
First claim
Opening claim text (preview).
What is claimed is: 1. An image device comprising a light source irradiating lights of a plurality of visible wavelengths for projecting to a transparent waveguide wherein the transparent waveguide having a saw-tooth shaped Fresnel lens surface disposed on the bottom surface of the waveguide for reflecting the lights as multiple light beams with a parallel optical axis along a vertically upward direction into a Polarized Beam Splitter (PBS) disposed immediately above the waveguide along the vertically upward direction; and the PBS constituting a cube-like structure having a diagonally oriented internal flat polarizing plate for changing polarizations and reflecting the light beams projected from the waveguide toward a display device having an image generating apparatus to display an image. 2. The image device according to claim 1 , wherein the display device having the image generating apparatus further comprises an apparatus formed as a LCOS, LCD or Micromirror Device. 3. The image device according to claim 1 , wherein the lights projected from the light source are projected and reflected by the flat surfaces of waveguide through total-internal-reflection. 4. The image device according to claim 1 , the light source further comprises a three-color RGB LED light source. 5. The image device according to claim 1 , the light source further comprises a light source irradiates continuous color spectrums lights. 6. An image device comprising a light source irradiating lights of a plurality of visible wavelengths for projecting to a transparent waveguide wherein the transparent waveguide having a saw-tooth shaped Fresnel lens surface disposed on the bottom surface of the waveguide for reflecting the lights as multiple light beams with a parallel optical axis along a vertically upward direction into a Polarized Beam Splitter (PBS) disposed immediately above the transparent waveguide along the vertically upward direction; and the PBS constituting a cube-like structure having a diagonally oriented internal flat polarizing plate for changing polarizations and reflecting the light beams with the parallel optical axis projected from the waveguide toward a display device for generating an image and the display device further reflects the image through the PBS and a lens set toward a total-internal-reflection (TIR) waveguide for propagating the image through and inside the total-internal-reflection (TIR) waveguide with a total internal reflection for reflecting the image to a viewer's eye. 7. The image device according to claim 6 , wherein the display device further comprises a Micromirror Device. 8. The image device according to claim 6 , wherein: the lights projected from the light source are projected directly and reflected by the Fresnel mirror toward the display device. 9. The image device according to claim 6 , wherein, the light source further comprises a three-color RGB LED light source. 10. The image device according to claim 6 , the light source further comprises a light source irradiates continuous color spectrums lights.
Assignees
Inventors
Classifications
comprising device for correcting geometrical aberrations, distortion · CPC title
characterised by optical features · CPC title
Multifaceted or polygonal mirrors {, e.g. polygonal scanning mirrors; Fresnel mirrors} · CPC title
comprising device for genereting colour display · CPC title
Eyeglass type (eyeglass details G02C) · CPC title
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Frequently asked questions
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- What does patent US11598971B2 cover?
- A compact light source for a projection display is disclosed enabling eye-glass display using a Fresnel mirror reflecting light without a distance as conventional prism type reflector.
- Who is the assignee on this patent?
- Ishii Fusao, Ntt Docomo Inc
- What technology area does this patent fall under?
- Primary CPC classification G02B27/283. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 07 2023 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).