Patent · US Expired

Augmented backlight

US6592232B2 · kind B2 · utility

7Cited by
2References
26Claims
0Family size

Assignee

Inventor

Key dates

Filing dateNov 16, 2001
Grant dateJul 15, 2003
Priority date—
Expiry dateNov 16, 2021

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG09G2360/144
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An optical system using ambient light. The system includes a screen to be illuminated, an internal light source and an external light collector to collect ambient light to illuminate the screen. A switch may be used to activate the internal light source, providing internal light to be combined with the ambient light to illuminate the screen. A light sensor may also be used to detect the level of light presented to the screen, with or without a controller to automatically control the process of providing illumination to the screen.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.