Method and apparatus for printing high resolution images using reflective LCD modulators
US6330018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/465
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for printing high resolution images on a photosensitive media (140) includes an array of LEDs (12) for forming a light beam uniformizing optics (45) and a condensor lens (70) which transforms the light beam to a telecentric beam. A polarizing beamsplitter (80) splits said telecentric beam into a first polarized beam and a second polarized beam and directs the first polarized beam to a first reflective LCD modulator (90) and directs the second polarized beam to a second reflective LCD modulator (95). The first reflective LCD modulator (90) rotates a first polarization state of the first polarized beam on a site by site basis to produce a first modulated polarized beam and reflects the first modulated polarized beam, in response to a first image data signal, through the polarizing beamsplitter (80). The second reflective LCD modulator (95) rotates the a second polarization state of the second polarized beam to produce a second modulated polarized beam and reflects the second modulated polarized beam, in response to a second image data signal, through the polarizing beamsplitter (80). A print lens(110) focuses the first and said second modulated polarized beams on the pri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.