CN2378827Y - Cold cathode fluorescence lamp tube with small power - Google Patents
Cold cathode fluorescence lamp tube with small power Download PDFInfo
- Publication number
- CN2378827Y CN2378827Y CN 99213065 CN99213065U CN2378827Y CN 2378827 Y CN2378827 Y CN 2378827Y CN 99213065 CN99213065 CN 99213065 CN 99213065 U CN99213065 U CN 99213065U CN 2378827 Y CN2378827 Y CN 2378827Y
- Authority
- CN
- China
- Prior art keywords
- fluorescent tube
- cold cathode
- positive column
- lamp tube
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an illuminating device using a linear light source, and provides a cold cathode fluorescence lamp tube with small power, high light efficiency and power factor and long service life. The tube diameter of the cathode region of the lamp tube is 5 to 16MM; the section area S of the positive column region is less than pi*D< 2 >/4; the length of the positive column region is 5 to 50MM. The utility model is especially suitable for making cold cathode fluorescent lamps with small power less than 3W.
Description
The utility model relates to a kind of lighting device that uses linear light source.
The following small-power fluorescent lamp of 2W comes into the market in a large number.The CN2243597Y patent provides a kind of small-power fluorescent tube and light fixture, it is respectively to acquire an auxiliary electrode at two negative electrode places of conventional fluorescent (comprising hot cathode lamp and cold cathode lamp), starting voltage is reduced greatly, only need adopt resistance capacitance as ballast simultaneously.The CNZL97240069.9 patent provides a kind of microminiature low-power (2W is following) fluorescent tube, and it comprises shell, negative electrode and activation member.Fluorescent tube is straight tube and forms U-shaped, and the shape of the positive column of fluorescent tube (being the mid portion of fluorescent tube) and sectional area are identical respectively with the shape and the sectional area of cathodic region (being the two end portions of fluorescent tube).But there is following defective: the 1) hot cathode of the most employing of mini light night at present, because of adopting the capacitor current limliting,, only be about 0.14 so the power factor of lamp is low excessively, if having loose contact in the electrical network circuit, cause the lights phenomenon sometimes.2) circuit cost height.Because of this lamp work time pulse is very big towards electric current, and increase, the LC filter circuit must be set for this reason radio interference intensity.3) light efficiency is low, job insecurity, and cathodic sputtering is serious.
The purpose of this utility model aims to provide a kind of light efficiency and power factor height, long cold cathode small-power fluorescent tube of life-span.
The utility model comprises shell and negative electrode, inner wall of tube shell coated fluorescent material, and fluorescent tube is straight shape or U-shaped, the caliber D=5～16mm in the cathodic region of fluorescent tube, the sectional area S＜π D of the positive column of fluorescent tube
2/ 4, the length of positive column is 5～50mm.
The cross section of fluorescent tube positive column can be circle, oblateness, ellipse etc.
Owing to adopt the structural design scheme that dwindles cross section, fluorescent tube positive column, make tube cathode two ends caliber keep bigger, be that the corresponding maintenance of cathode emissive area is bigger, thereby the temperature that has suppressed electrode in the course of the work raises, just controlled the rising of lamp current, thereby improved the job stability of lamp, reduced cathodic sputtering and flicker, the life-span of lamp is obviously prolonged.
Because fluorescent tube positive column (fluorescent tube mid portion) position reduced cross-sectional area (less than the negative electrode position) has improved the current density of positive column under the situation of little operating current, make mercury can reach optimum working temperature.Reduced cross-sectional area makes the ultraviolet phosphor powder layer that is radiated easily on the tube wall, has improved the luminous efficiency of fluorescent tube from face.Simultaneously, fluorescent tube positive column reduced cross-sectional area makes fluorescent tube pipe voltage rise height, and its current-limiting resistance resistance is also corresponding less, value 1～15K Ω/0.25～0.5W for example, and the power consumption of resistance is very little, but can play the double action of protection and choked flow.And power factor is near 1.The utility model is specially adapted to make≤the cold cathode small-power fluorescent tube of 3W.
Fig. 1 is an outside drawing of the present utility model.
Fig. 2 is the circular positive column sectional view of Fig. 1.
Fig. 3 is a flat positive column sectional view.
Fig. 4 is a U-shaped fluorescent tube outside drawing.
Fig. 5 is a working circuit diagram.
Shown in Fig. 1～3, the utility model comprises coated fluorescent RE powder on shell and the negative electrode inner wall of tube shell, and shell is straight tube shape, and the sectional area of positive column 1 is less than the sectional area in cathodic region 2, cathodic region 2 caliber D=5～16mm, the sectional area S＜π D of positive column
2/ 4, the length of positive column is elected 5～50mm as.The cross section of positive column can be circular (see figure 2), oblate (see figure 3), ellipse, polygon etc.
As shown in Figure 4, fluorescent tube can be made into U-shaped, and the sectional area of its positive column 1 is less than the sectional area in cathodic region 2.
As shown in Figure 5, during fluorescent tube 3 work, the negative electrode of fluorescent tube 3 and current-limiting resistance R
1, R
2, R
3
Claims (3)
1. cold cathode small-power fluorescent tube comprises shell and negative electrode, and inner wall of tube shell coated fluorescent material is characterized in that the caliber D=5～16mm in the cathodic region of fluorescent tube, the sectional area S＜π D of the positive column of fluorescent tube
2/ 4, the length of positive column is 5～50mm.
2. cold cathode small-power fluorescent tube as claimed in claim 1 is characterized in that the cross section of the positive column of fluorescent tube is circular, oblate, oval, polygon.
3. cold cathode small-power fluorescent tube as claimed in claim 1 is characterized in that fluorescent tube is straight shape or U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99213065 CN2378827Y (en) | 1999-06-09 | 1999-06-09 | Cold cathode fluorescence lamp tube with small power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99213065 CN2378827Y (en) | 1999-06-09 | 1999-06-09 | Cold cathode fluorescence lamp tube with small power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2378827Y true CN2378827Y (en) | 2000-05-17 |
Family
ID=34005570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99213065 Expired - Fee Related CN2378827Y (en) | 1999-06-09 | 1999-06-09 | Cold cathode fluorescence lamp tube with small power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2378827Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351667C (en) * | 2002-10-22 | 2007-11-28 | 宇东科技股份有限公司 | Compensating light source capable of compensating light attenuation caused by light path and its design method |
| CN101131913B (en) * | 2006-07-19 | 2010-06-09 | 葛世潮 | High-luminous flux cold-cathode fluorescent lamp |
-
1999
- 1999-06-09 CN CN 99213065 patent/CN2378827Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351667C (en) * | 2002-10-22 | 2007-11-28 | 宇东科技股份有限公司 | Compensating light source capable of compensating light attenuation caused by light path and its design method |
| CN101131913B (en) * | 2006-07-19 | 2010-06-09 | 葛世潮 | High-luminous flux cold-cathode fluorescent lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |