CN2819465Y - External electrode fluorescent light coated by transmissive film on inner wall - Google Patents
External electrode fluorescent light coated by transmissive film on inner wall Download PDFInfo
- Publication number
- CN2819465Y CN2819465Y CN 200520071283 CN200520071283U CN2819465Y CN 2819465 Y CN2819465 Y CN 2819465Y CN 200520071283 CN200520071283 CN 200520071283 CN 200520071283 U CN200520071283 U CN 200520071283U CN 2819465 Y CN2819465 Y CN 2819465Y
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- CN
- China
- Prior art keywords
- wall
- glass
- external electrode
- coated
- 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 external electrode fluorescent lamp coated by a transmitting film on the inner wall for large screen display, which has the characteristics of enhancing the transmitting capability of lamp tube electrodes and increasing screen brightness. The utility model has the structure that a fluorescent powder layer 2 is coated on the surface of the intermediate section of the inner wall of a glass tube 1; a metal transmitting film 3 is respectively coated on two end parts of the inner wall of the glass tube 1. An external electrode 4 is respectively arranged on two end parts of the surface of the glass tube. The utility model has the advantages that because the external electrodes generate capacity coupling through glass medium and the metal film layers of the inner wall rather than the glass inner wall, the electron transmission capability is obviously enhanced; stable discharge current can be obtained under lower voltage; the luminous stability is ensured. Great discharge current can be obtained under the same voltage with ordinary EEFL; consequently, the brightness of the lamp is enhanced.
Description
Technical field:
The utility model relates to a kind of external electrode fluorescence lamp that is used for the transmitting film coated internal wall of large scale display, has the lamp tube electrode of raising emissivities, increases the characteristics of screen intensity.Belong to the fluorescent lamp technical field.
Background technology
LCD display mostly adopts cold-cathode fluorescence lamp (CCFL) as backlight at present, increase along with display screen, keep screen intensity then to need many tubes, and every CCFL needs by an independently driving power power supply, thereby technical scheme complexity, it is big to take up room, and reliability is low, the product cost height; External electrode fluorescence lamp (EEFL) is because its peculiar voltage-current characteristic can make one group of fluorescent tube drive by a driving power is in parallel, but weak point is: because its discharge is that external electrode passes through glass medium layer and the coupling of glass-tube inwall on the glass wall by being coated in, its emission ratio is much smaller than metal electrodes such as aluminium, nickel, so compare with CCFL, it is little that same electrical is depressed discharging current, job insecurity under the low temperature, 35%-40% is hanged down in brightness.
Summary of the invention
The purpose of this utility model is to overcome existing cold-cathode fluorescence lamp (CCFL) multitube can not a shared driving power; External electrode fluorescence lamp (EEFL) luminous efficiency is low, defective such as unstable working condition provides a kind of novel external electrode fluorescence lamp under the low temperature, and this fluorescent lamp not only has general external electrode fluorescence lamp characteristics, and it is low to have a driving voltage, the advantage that luminosity is high.
Technical solution of the present utility model: its structure is to be coated with fluorescent material on the section surface in the inwall of glass-tube, matel coated transmitting film on inwall two ends of glass-tube, glass-tube two ends, surface on establish external electrode.
The beneficial effects of the utility model are, because external electrode is by glass medium and inwall metallic diaphragm rather than glass inwall generation capacitively coupled, electron emissivity obviously strengthens, and can obtain stable discharging current under lower voltage, has guaranteed luminous stability; Depressing, can obtain bigger discharging current, thereby improve the brightness of lamp with common EEFL same electrical.
Description of drawings
Accompanying drawing is a structural representation of the present utility model
Among the figure 1 is glass-tube, the 2nd, fluorescent material, the 3rd, metal transmitting film, the 4th, external electrode
Embodiment
Contrast accompanying drawing, its structure are to be coated with fluorescent material 2 on the section surface in the inwall of glass-tube 1, matel coated transmitting film 3 on inwall two ends of glass-tube 1, glass-tube 1 two ends, surface on establish external electrode 4.
The manufacture method of the external electrode fluorescence lamp of transmitting film coated internal wall, its processing step divides one, glass-tube is cut into corresponding size, and cleans; Two, on the inwall at glass-tube two ends, plate the metal transmitting film with evaporation or chemical method; Three, remove the metal film at sealing-in position, two ends with the method for chemical etching; Four, be coated with fluorescent material, the roasting binding agent that goes in the powder, wipe the surplus powder at sealing-in position; Five, the first end glass-tube is sealed; Six, exhaust, charge into inert mixed gas, annotate mercury, from the gas extraction system sealed-off; Seven, secondary sealed-off; Eight, on the outer glass wall of the same position of glass-tube two ends inwall metallic diaphragm, be coated with the external electrode that is covered with graphite or silver oxide coating.
External electrode, is applied on the metal transmitting film of inwall in the high frequency voltage ingress pipe by capacitively coupled, makes the gaseous mixture of inert gas and mercury produce discharge, gives off the 253.7nm ultraviolet ray, is converted into visible light by fluorescent material again.
The utility model since external electrode by glass medium and inwall metallic diaphragm rather than glass inwall generation capacitively coupled, electron emissivity obviously strengthens, and can obtain stable discharging current under lower voltage, has guaranteed luminous stability; Depressing, can obtain bigger discharging current, thereby improve the brightness of lamp with common EEFL same electrical.
Claims (1)
1, the external electrode fluorescence lamp of transmitting film coated internal wall, it is characterized in that in the inwall of glass-tube (1), being coated with on the section surface phosphor powder layer (2), matel coated transmitting film (3) on inwall two ends of glass-tube (1), glass-tube (1) two ends, surface on establish external electrode (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520071283 CN2819465Y (en) | 2005-04-30 | 2005-04-30 | External electrode fluorescent light coated by transmissive film on inner wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520071283 CN2819465Y (en) | 2005-04-30 | 2005-04-30 | External electrode fluorescent light coated by transmissive film on inner wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2819465Y true CN2819465Y (en) | 2006-09-20 |
Family
ID=37005524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520071283 Expired - Fee Related CN2819465Y (en) | 2005-04-30 | 2005-04-30 | External electrode fluorescent light coated by transmissive film on inner wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2819465Y (en) |
-
2005
- 2005-04-30 CN CN 200520071283 patent/CN2819465Y/en not_active Expired - Fee Related
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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 |