Inventor

DUFFIELD DAVID J

US20 patents

⚠️ This page may combine multiple inventors who share the name “DUFFIELD DAVID J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DUFFIELD DAVID J

THOMSON CONSUMER ELECTRONICS

Tuner control apparatus having tune-by-label capability and using alphabetical label storage

Signal swap apparatus for a television receiver having an HDTV main picture signal processor and an NTSC Pix-in-Pix signal processor

Picture-in-picture circuitry using field rate synchronization

Automatic letterbox detection

Television receiver having the capability to associate any HDTV and any NTSC channel

Data transfer from an external computer to a television receiver having picture-in-picture capability

Programmable picture-outside-picture display

Data transfer from a television receiver having picture-in-picture capability to an external computer

Television system with zoom capability for at least one inset picture

System for controlling updates of extended data services (EDS) data

Video display having progressively dimmed video images and constant brightness auxiliary images

Programmable remote control unit without extra key for configuration

Side by side picture display with reduced cropping

Automatic channel sampling picture-in-picture circuitry

Fast response picture-in-picture circuitry

Field to field vertical panning system

RCA LICENSING CORP

Tuner control apparatus having tune-by-label capability

User programmable switching arrangement

Inset picture centering in a pix-in-pix system

Apparatus and a method for automatically centering a video zoom and pan display