Yoshiharu Ooi
42Patents
14h-index
52Co-inventors
84Inventor score
Filing activity: Apr 25, 1985 → Sep 15, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5587816A | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | Physics | 141 | Expired |
| US5798805A | Projection type display apparatus | Electricity | 85 | Expired |
| US5754260A | Projection type color liquid crystal optical apparatus | Electricity | 71 | Expired |
| US5648860A | Projection type color liquid crystal optical apparatus | Electricity | 66 | Expired |
| US5206746A | Transparent-scattering type optical device including a prism with a triangular longitudinal cross section | Physics | 55 | Expired |
| US5245449A | Polymer dispersed liquid crystal color projection display apparatus | Electricity | 37 | Expired |
| US5283675A | Liquid crystal display element with electrode having concave-convex surface at liquid crystal side | Physics | 29 | Expired |
| US5216531A | Projection type active matrix polymer dispersed liquid crystal display apparatus with particles of liquid crystal material randomly oriented | Physics | 27 | Expired |
| USRE37377E | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | General | 24 | Expired |
| US6580674B1 | Phase shifter and optical head device mounted with the same | Physics | 24 | Expired |
| US5844638A | Light source apparatus using a cone-shaped element and an applied apparatus thereof | Electricity | 23 | Expired |
| USRE38305E1 | LCD device including an illumination device having a polarized light separating sheet between a light guide and the display | General | 15 | Expired |
| US7738344B2 | Liquid crystal lens element optical head device | Physics | 15 | Active |
| US5274480A | Projection type display apparatus having an aperture stop means including non-circular openings | Electricity | 14 | Expired |
| US5838404A | Display device with optical member having two parts in overlay relation to reflect light incident at particular angle | Physics | 13 | Expired |
| US4968881A | Voltage detector using electro-optic material having anti-reflective coatings | Physics | 11 | Expired |
| US6891147B2 | Wavelength-selective diffraction element and an optical head device | Physics | 11 | Expired |
| US7773489B2 | Liquid crystal lens element and optical head device | Physics | 11 | Active |
| US5659409A | Light source apparatus using a cone-like material and an applied apparatus thereof | Electricity | 10 | Expired |
| US7430076B2 | Diffraction element | Physics | 8 | Expired |
| US5208696A | Spatial light modulating device with CRT input image | Physics | 7 | Expired |
| US4794033A | Optical joint comprising antireflection films | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7388822B2 | Liquid crystal lens element and optical head device | Physics | 6 | Active |
| US4763996A | Spatial light modulator | Electricity | 5 | Expired |
| US7738346B2 | Polarizing diffraction element and optical head device | Physics | 5 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.