1995 Fiscal Year Final Research Report Summary
Development of Color-Controlled Lamp Using Negative Glow along the Inner Wall
Grant-in-Aid for Developmental Scientific Research (B)
|Allocation Type||Single-year Grants |
|Research Institution||Akashi College of Technology |
RYOKO Masatoshi Akashi College of Technology, Electrical Engineering, Professor, 電気工学科, 教授 (90043421)
YAMASAKI Hiroyoshi Mitsubishi Electric Lighting Co., Lighting Development, Deputy General Manager, 開発部, 次長
FUJINO Tatsushi Akashi College of Technology, Electrical Engineering, Assistant Professor, 電気工学科, 助教授 (80099829)
|Project Period (FY)
1994 – 1995
|Keywords||negative glow / ITO / transparent electrode / fluorescent lamp / high frequency discharge / color temperature / inner wall / outer Electrode|
(1) Transparent and electrically conductive ITO electrodes
Necessary thickness of ITO film on the outer wall of lamp envelope was about 0.3 mum.
(2) Kinds and pressure of enclosed gas
We enclosed Hg-Ne or Hg-Xe mixed gas in a straight tube type of 15W size fluoresent lamp and tested them. We got better results in brightness and color controlling for Hg-Xe using suitable fluorescent materials than for Hg-Ne. We got the brightness of negative glow at highest 500 [nt] for Hg-Ne, but more than 1,000 [nt] for Hg-Xe. We were able to change the color temperature widely, 2,500 [K] -6,500 [K], for Hg-Xe.
(3) Fluorescent materials
We got good results using "NP10+NP360" and "NP92-70+NP1047" for fluorescent materials on sale.
(4) Wave form of high frequency voltage between outer electrodes
We got better results in the brightness using rectangular wave voltage than sine wave voltage. But its frequency, from 20 [kHz] to 80 [kHz], didn't effect to control color temperature.
Finally, we were able to control well the color temperature and got 8,000 [nt] in brightness at the maximum.
Research Products (2 results)