JPS62123648A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To aim at improvement in the extent of brightness in a lamp owing to a synergetic effect of two types of boron, by containing the boron in both sides of glass and a phosphor constituting a bulb and an inorganic adherent adhering to an inner surface of this bulb. CONSTITUTION:Boron (B2O3 in an analytical way) is contained in glass and an inorganic adherent each constitution a bulb. Constituting the bulb like this, brightness in a lamp is sharply improved owing to synergism of the boron contained in the glass and that in the inorganic adherent. That is to say, supposing that a brightness improving effect in case of containing the boron in the bulb alone is set down to X, the effect in case of containing the boron in the adherent to Y and the effect in case of containing the boron in both of the bulb and the adherent to Z, respectively, it is considered to be such a relationship of Z>X.Y. In consequence, improvement in the lamp brightness is well promoted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a fluorescent lamp with improved luminous efficiency.

[Summary of the invention]

The fluorescent lamp of the present invention has a phosphor coated on the inner surface of a glass bulb together with an inorganic adhesive, and both the glass bulb and the inorganic adhesive contain boron (element thread),
The lamp is characterized by a synergistic effect that dramatically improves the brightness of the lamp.

[Conventional technology]

Conventionally, a phosphor is deposited on the inner surface of a bulb made of soda lime glass, lead glass, etc. along with an inorganic adhesive such as lead glass, oxalate glass, or other inorganic fine powder, and filament electrodes are sealed at both ends of the bulb. Fluorescent lamps are known in which a suitable amount of mercury is sealed in the bulb along with a starting gas such as argon.

Conventionally, many improvements have been made to phosphors and starting gases in order to improve brightness, and although great results have been obtained, even greater improvements are desired.

[Problem that the invention seeks to solve]

As a result of various studies on components other than the phosphor and starting gas, the inventors discovered that there was room for research in the combination of the glass composition of the bulb and the inorganic adhesive, and conducted much research and experimentation. Later, he invented the optimal combination and was able to improve brightness.

[Means for solving problems]

The present invention has been made to solve the above problems,
This fluorescent lamp is improved by incorporating boron (an elemental group, analytically expressed as B2O3) into each of the glass and inorganic adhesive that make up the bulb.

[Effect]

Since the fluorescent lamp of the present invention was constructed as described above, the brightness of the lamp was significantly improved due to the synergistic effect of the boron in the glass and the boron in the inorganic adhesive.

〔Example〕

A ring-shaped fluorescent lamp FCL 30/281i1 was used as a test product.
Using F, three types of glass compositions and eight types of inorganic adhesives were selected for the bulbs, and each combination of these was used to construct the above fluorescent lamps, and 10 lamps were tested for each test item to measure the light output. , the average value was expressed as a relative value.

First, we will show the glass composition of the bulb.

A...5in2・Na2O・Dolomite B...Si
O□・Na2O・Dolomite + 1% by weight Ba0C...
SiO2.Na2O.Dolomite+1% by weight B2o3 Next, the composition of the inorganic adhesive is shown.

a -82034nO b...B2O3・CaO・Ba0 c -8203・Pb0 d ・-Ca2P20v e -Ca3(PO4)2 f...i20゜g...TiO□ h...5in2 It is clear from this table In other words, the combination of C-a, C-b, and C-C, in other words, B20. Those containing this component have superior light output compared to all other combinations.

Furthermore, it can be seen that by containing boron in both the bulb and the inorganic adhesive, there is a synergistic effect that improves the brightness of the lamp. In other words, the effect of improving brightness by containing boron only in the bulb is X, and the effect of improving brightness by containing boron in the adhesive is Y.
If the brightness improvement effect due to the inclusion of boron in both the bulb and the adhesive is 2, then the relationship z>x - y can be seen.

For example, by changing the combination of A-d to the combination of Cd (i.e., containing boron in the bulb), the brightness can be improved, or by using the values in the table, 101.0 X = 98.0 = 1.03 can be obtained. , the brightness improvement effect Y by changing the combination of Ad to the combination of A-a (that is, incorporating boron in the adhesive) is too.

Y = , =1.02 are obtained, and the brightness improvement effect Z by changing from the combination A-d to the combination C-8 is 2 = 1 sound L = 109.8 98.0. It can be seen from the numerical value that x-y<z. Similar results are obtained for other combinations.

This means that the inclusion of boron in both the bulb and the inorganic adhesive produced some kind of synergistic effect, and as a result, the brightness of the lamp was improved more than expected.

Note that the glass and inorganic adhesive that constitute the bulb in the present invention are not limited to the above-mentioned compositions, and both contain boron (
Any known material may be used as long as it contains an elemental group). Further, the fluorescent lamp is not limited to a ring shape, but may have any external shape such as a straight tube shape or a saddle shape. In this way, the composition and emission color of the phosphor do not matter.

〔Effect of the invention〕

In this way, the fluorescent lamp of the present invention contains boron (elemental group) in both the glass constituting the bulb, the phosphor, and the inorganic adhesive that adheres to the inner surface of the bulb. The brightness has been significantly improved.

Claims (1)

[Claims] A fluorescent lamp comprising a phosphor coated on the inner surface of a glass bulb together with an inorganic adhesive, wherein both the glass bulb and the inorganic adhesive contain boron. lamp.