Title:
METHOD AND APPARATUS FOR ESTIMATING INTENSITY OF ONE SPECTRUM OF LIGHT IN MIXED LIGHT, IN RESPONSE TO SENSED INTENSITIES OF ONE OR MORE OTHER SPECTRUMS OF LIGHT IN MIXED LIGHT
Document Type and Number:
Japanese Patent JP2008249687
Kind Code:
A
Abstract:
To provide a device that does not have a problem wherein an optical feedback system used by a lighting system such as an LCD backlight does not sufficiently measure the intensity of "visible red" wavelength in a mixed light.
In one embodiment, light having a first spectrum is filtered from the mixed light. Light having a second spectrum, different from the first spectrum, is also filtered from the mixed light. An intensity of the light having the first spectrum, and an intensity of the light having the second spectrum, are then sensed. From the sensed intensities of the lights having the first and second spectrums, an intensity of light having a third spectrum is estimated.
Inventors:
LIM LEN-LI KEVIN
NISHIMURA KEN A
NISHIMURA KEN A
Application Number:
JP2008014838A
Publication Date:
October 16, 2008
Filing Date:
January 25, 2008
Export Citation:
Assignee:
AVAGO TECH ECBU IP SG PTE LTD
International Classes:
G01J3/51
Domestic Patent References:
| JPH04118531A | 1992-04-20 | |||
| JPS617445A | 1986-01-14 | |||
| JP2001159567A | 2001-06-12 | |||
| JP2006314557A | 2006-11-24 |
Foreign References:
| DE4438905A1 | 1995-11-16 |
Other References:
“2005年度版 光学部品・製品総合カタログ”, JPN6010035422, 2005, pages 58, ISSN: 0001653887
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Masayuki Okamoto
Fukagawa Eri
Satoshi Morimoto
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Masayuki Okamoto
Fukagawa Eri
Satoshi Morimoto