JPS609538B2 - Phosphor layer forming method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for forming a poppy and light layer.

In recent years, in order to improve the efficiency and color rendering properties of light lamps, based on research results on human color vision, three types of light lamps have been developed, which have emission spectrum peaks around 45 m, 54 m, and 61 m. Various types of poppies, poppies consisting of a light body, poppies with a light body layer, and light lamps have been proposed. The poppies and light bodies used for this are europium-activated barium magnesium aluminate, which has an emission spectrum peak at 45 nm, terbium-activated cerium magnesium aluminate, which has an emission spectrum peak at 54 square meters, and emission spectrum at 611 nm. Each poppy of europium-activated yttrium oxide has a peak of . These three types of poppies and light bodies are all made of rare materials and are therefore extremely expensive, so in order to reduce lamp costs, the poppy and light bodies are coated in two layers and placed on the glass tube side. A lamp is produced by applying inexpensive antimony and manganese-activated calcium halophosphate poppies and a luminous material to about 50% of the total surface, and then applying the three types of rare poppies and luminous substances on top of the coating to about 50%. It is known that the brightness and color rendering properties are almost the same as those of the single-layer method, and the amount of light used can be reduced by about half, making it possible to significantly reduce costs. However, even if the two-layer poppy and light structure are adopted as described above, the lamp cost is still lower than that of the conventional one.
They are more expensive than light lamps. The reason for this is that the light layer is formed on the inner surface of the glass tube using a suspension for the light layer using a binder that is soluble in an organic solvent. After drying and testing, a second poppy was prepared using the same organic solvent-soluble binder as the suspension for the first poppy and light layer as the suspension for the light layer. It is deposited, dried, and anointed to form a fluorescent film. However, according to this forming method, it is necessary to apply the first poppy and the light layer, phosphorize it after drying, then apply the second poppy and the light layer, and then bake it after drying, making the manufacturing process extremely complicated. It had the disadvantage of becoming In this case, the first poppy, the light layer was applied, and the bowl was attached after drying. The first phosphor layer is dissolved in the solvent of the second phosphor suspension, and this is mixed into the second phosphor layer, which improves the luminous efficiency and color transfer of the second phosphor layer. This is because the quality decreases. The present invention has been made to eliminate the above-mentioned drawbacks, and will be explained below with reference to the drawings.

In the figure, a first layer of antimony- and manganese-activated calcium halophosphate and a light layer 2 are attached to the inner surface of a glass tube 1 using a water-soluble binder, and after drying, europium-activated barium aluminate is applied. Magnesium poppy, light body, terbium activated cerium magnesium aluminate poppy, light body, and europium activated yttrium oxide poppy,
Three types of rare earth poppies of the light body, a second poppy consisting of the light body, and a light body layer 3 are deposited on the first poppy and the light body layer using a binder soluble in an organic solvent, By drying and aging, a two-layer structure of poppy and light body is formed on the inner surface of the glass tube 1.

According to the method of the present invention, the formation of the first ribbed light layer is carried out in a light suspension using a water-soluble binder;
In addition, the adhesion of the second light layer is carried out using a non-water-soluble organic solvent-soluble binder and a light suspension. During adhesion formation, the first poppy and light body are not dissolved by the second poppy and light body, so the first poppy and light body do not mix into the second poppy and light body layer.

Therefore, the baking of the first phosphor layer can be omitted, and the number of baking steps can be reduced to just one, which simplifies the manufacturing process and improves production efficiency compared to conventional methods. This will lead to a reduction in the cost of light lamps. 3. It should be noted that the second poppy, the rare poppy that constitutes the light body layer, and the light body do not need to be composed of three types, and may be composed of one type or two types. Furthermore, it goes without saying that the rare poppies and light bodies are not limited to those of the above embodiments.

4.Furthermore, when the first poppy layer is coated with a light suspension using a water-soluble viscosity agent, if the amount of shedding is less than 1.7 layers per part, the poppy layer Due to the mechanical impact when applying the light material, countless air bubbles are generated due to the surfactant added to the light material suspension, which causes poppy
The appearance of the light lamp is greatly damaged, while 6.5 per 1
When the temperature exceeds 9, the binder in the phosphor layer is not completely thermally decomposed and remains in the phosphor layer during the first cracking process, resulting in a decrease in lamp light intensity. As a result, the amount of light from the light layer increases, which accounts for a large amount of light in the total amount of light emitted from the light lamp, resulting in a significant loss of color rendering properties. Therefore, if the coating amount of the light body layer is in the range of 1.7 to 6.5 pieces per part, the sticky agent will be completely thermally decomposed and no decrease in lamp light will be observed. , and firstly, it was found that the amount of light from the light body layer accounted for only a small proportion of the total light from the lamp, and had almost no effect on the color rendering properties. Example 1 Antimony- and manganese-activated calcium halophosphate poppy was added to an aqueous solution containing 8.4 parts of a copolymer of isobutylene and maleic anhydride dissolved in 1000 parts of deionized water, and 70 parts of light material was added.
0 evenings dispersed, 200 enemies. p. m. After soaking for 5 minutes, remove the nonionic surfactant and apply 20
After adding a sail plate and further adjusting the pH to 10 with aqueous ammonia, the pH was adjusted to 100 μm again. p. m. After that, it was coated on the inner surface of the glass tube in a ratio of 5.3 to 9 and dried.

Next, nitrocellulose 2 to 1000 butyl acetate
．． A second poppy is prepared using a phosphor suspension in which predetermined amounts of the three types of rare phosphors are dispersed in a solution of 09;
The light body layer was coated with 9 parts of 6.2 parts, dried, and baked to give 40 parts.
A light lamp was made from a W poppy. When the poppy light lamp thus obtained was subjected to a lighting test, the lamp luminous flux was 3450 meters and the average color rendering index was 84. As explained above, in the present invention, a first layer is formed on the inner surface of a glass tube, a light layer is formed using a water-repellent binder, a light layer is attached to the inner surface of the glass tube, and a second layer is formed after drying. A poppy layer is formed using an organic solvent-soluble binder, and a light material suspension is applied, dried, and baked to form a two-layer structure. , the number of times of irradiation of the phosphor layer can be reduced to one time without contamination with the phosphor layer, and therefore without any loss of luminous efficiency and dark color properties of the phosphor layer. This simplifies the process, improves production efficiency, and greatly contributes to reducing the cost of lamps and light lamps.

[Brief explanation of the drawing]

The figure is a sectional view of a fluorescent lamp obtained by the method of the present invention. 1...Glass tube, 2...First poppy, phosphor layer, 3...Second phosphor layer.

Claims (1)

[Claims] 1 A fluorescent lamp consisting of two layers of phosphor coated on the inner surface of a glass tube, the first phosphor layer coated on the glass tube side being antimony- and manganese-activated calcium halophosphate fluorescent lamp. The second phosphor layer, which is deposited on the discharge side, has a peak wavelength of 430 to 490 nm in the emission spectrum.
in the range of 20 to 570 nm and 600 to 640 nm, and the half width of each emission spectrum is 30 to 60 nm, respectively.
nm, 5-30 nm and 5-30 nm, and the first phosphor layer is made of a water-soluble binder. After coating with a phosphor suspension and drying, the second phosphor layer is coated with a phosphor suspension using an organic solvent, dried, and baked to form a phosphor on the inner surface of the glass tube. A method for forming a phosphor layer, the method comprising forming a body layer.