Title:
FLASH LAMP AND METHOD FOR ADJUSTING FLASHING OF FLASH LAMP
Document Type and Number:
WIPO Patent Application WO/2019/031195
Kind Code:
A1
Abstract:
Provided is a flash lamp which can maintain brightness in a predetermined range even if some of LED columns fail to light up. The flash lamp of the present invention comprises: an LED module (10) serving as a light source; a light distribution means; a housing having an opening portion; and an optically transmissive cover. The LED module (10) and the light distribution means are arranged in the housing. The light distribution means is arranged on the light irradiated side of the LED module (10). The optically transmissive cover is arranged in the opening of the housing. The LED module (10) includes an LED mounting substrate (11), a plurality of LED columns (P1 to Pn), and an adjusting means (C) for adjusting a flash of light from the plurality of LED columns (P1 to Pn) on a column by column basis. The plurality of LED columns (P1 to Pn) are mounted on one surface of the LED mounting substrate (11). Each of the plurality of LED columns (P1 to Pn) is a column in which a plurality of LEDs are electrically connected, and the columns are mutually electrically connected. The adjusting means (C) is a means which, if some of the LED columns (P1 to Pn) fail to light up, extends the flashing time of the LEDs of the remaining LED columns so as to maintain the brightness of the plurality of LED columns (P1 to Pn) as a whole in a predetermined range.
Inventors:
MIZOBE NORIMASA (JP)
Application Number:
PCT/JP2018/027256
Publication Date:
February 14, 2019
Filing Date:
July 20, 2018
Export Citation:
Assignee:
NEC LIGHTING LTD (JP)
International Classes:
H05B37/02; F21S2/00; F21Y115/10
Domestic Patent References:
| WO2017081999A1 | 2017-05-18 |
Foreign References:
| JP2007137187A | 2007-06-07 | |||
| JP2017153453A | 2017-09-07 |
Other References:
See also references of EP 3668277A4
Attorney, Agent or Firm:
TSUJIMARU Koichiro et al. (JP)
Download PDF: