发明名称 |
TUBULAR ELECTRIC BULB, LUMINAIRE AND IMAGE FORMING DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To easily and accurately connect metal caps to a tubular glass bulb by forming a band-like light diffusion layer at a specified position of a surface of the bulb along the axis, and forming a specified groove on each cap. SOLUTION: A glass bulb 1 has a light diffusion layer 4 formed extending along the axis on the side of a half surface, and the other region is mainly transparent. A filament 2 is disposed in the bulb 1 along its axis. A first metal cap 5A is disposed at one end, and a groove 57 is formed on this cap 5A at the position of linear symmetry to the center line X-X dividing into two the light diffusion layer 4 formed on the outer circumferential surface of the bulb 1. This cap 5A has a power feeder terminal 51 electrically communicated with the filament 2. On the other end of the bulb 1, a second metal cap 5B having a power feeder terminal 51 electrically communicated with the filament 2 is formed without the provision of a groove on the circumferential surface. |
申请公布号 |
JPH0992232(A) |
申请公布日期 |
1997.04.04 |
申请号 |
JP19950246222 |
申请日期 |
1995.09.25 |
申请人 |
TOSHIBA LIGHTING & TECHNOL CORP |
发明人 |
AOKI NAOMITSU;SAKA IPPEI;SHIBATA NOBUKI |
分类号 |
G03B27/54;F21V7/00;H01K1/14;H01K1/32;H01K1/46;H04N1/04;(IPC1-7):H01K1/32;F21V7/12 |
主分类号 |
G03B27/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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