Keiji Kashima
71Patents
18h-index
39Co-inventors
84Inventor score
Filing activity: Feb 14, 1991 → Jan 29, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5735590A | Backlighting device with a transparent sheet having straight ridges | Physics | 137 | Expired |
| US5521797A | Backlighting device | Emerging Cross-Sectional Technologies | 98 | Expired |
| US5262928A | Back lighting device | Physics | 95 | Expired |
| US5093765A | Back lighting device for a panel | Physics | 84 | Expired |
| US5442523A | Backlighting device | Physics | 73 | Expired |
| US5995288A | Optical sheet optical sheet lamination light source device, and light-transmissive type display apparatus | Physics | 61 | Expired |
| US6504589B1 | Backlight device and liquid crystal display device | Physics | 55 | Expired |
| US5618095A | Backlighting device | Mechanical Engineering; Lighting; Heating | 44 | Expired |
| US5289351A | Backlighting device | Physics | 37 | Expired |
| US5688035A | Backlighting device free of a bright line | Physics | 37 | Expired |
| US5392199A | Back lighting device | Physics | 29 | Expired |
| US6417831B2 | Diffused light controlling optical sheet, back light device and liquid crystal display apparatus | Physics | 27 | Expired |
| US6147734A | Bidirectional dichroic circular polarizer and reflection/transmission type liquid-crystal display device | Physics | 26 | Expired |
| US6259496A | Backlight device and light transmission type display apparatus | Physics | 23 | Expired |
| US7030949B2 | Optical display including a cholesteric layer, a display device and a diffusing layer on an exit side of the cholesteric layer | Physics | 23 | Expired |
| US5730518A | Backlighting device | Physics | 23 | Expired |
| US6104455A | Back light device and liquid crystal display apparatus | Physics | 20 | Expired |
| US6147804A | Optical sheet lamination | Physics | 18 | Expired |
| US7324180B2 | Laminated retardation optical element, process of producing the same, and liquid crystal display | Physics | 14 | Expired |
| US5647655A | Back lighting device | Physics | 13 | Expired |
| US6624937B2 | Polarization splitting sheet, optical sheet laminate, planar light source apparatus, and transmission-type display apparatus | Physics | 12 | Expired |
| US6559911B2 | Polarization light splitting film, backlight system and liquid crystal display having particular diffusion layer under optical rotation selection layer | Physics | 12 | Expired |
| US7206041B2 | Liquid-crystal display | Physics | 11 | Expired |
| US7719643B2 | Retardation layer and liquid crystal display apparatus using the same | Physics | 10 | Expired |
| US6906764B2 | Reflective cholesteric filter | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.