JPS6336884Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to light distribution control of lighting equipment.

Transparent globes commonly used in lighting equipment are made of transparent, translucent, or patterned glass, and are excellent in design, but many do not have optical characteristics, that is, light distribution. Prism glass or an aluminum parabolic reflector is used to control the light distribution, which has the disadvantage of restricting design and increasing manufacturing costs of the lighting equipment.

This invention uses a translucent globe made of transparent glass with stripes of white paint to let light into the lighting equipment, and by changing the position of the light source, it creates a simple design.
This is an improved version of the lighting fixture that provides a unique light distribution.

Conventionally, this type of lighting equipment will be explained with reference to FIGS. 1 and 2. Reference numeral 1 denotes a light source located at the center of the lighting equipment. Reference numeral 2 indicates a frame portion of the lighting fixture, which securely holds a translucent globe 3. Reference numeral 4 designates a socket for a light source, and reference numeral 5 designates a socket mounting plate, which is fixed to a pole 7 through a socket 6 of the pole while protruding inward from a part of the frame body 2. In such conventional lighting equipment, emphasis is placed on the design of the translucent globe 3, and for this reason transparent, translucent, patterned glass, etc. are used as materials, and its light distribution characteristics are shown in Figure 2A. As shown in the figure, it is common to have a circular light distribution with an average of the top and bottom, and it has no characteristics.

In such lighting equipment, the position of light source 1 is
Even if the light distribution is changed to A', the shape of the light distribution remains the same as before, as shown in FIG. 2B, even though the amount of light emitted in the direction changes. The present invention has been made in view of the above points, and is intended to provide a lighting fixture that achieves both design and light distribution characteristics.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 8. Fig. 3 shows an example of a translucent globe used in the lighting equipment of the present invention, and its structure is such that the globe 3 made of transparent glass is spaced at approximately equal intervals on the front and back surfaces, and so that they do not overlap each other. A semi-transparent film 9 is formed by applying white paint and special baking. When the light from the light source 1 passes through the semi-transparent film 9, the transmission is small, as shown in figure a, and when it passes through the non-adhered area 9a, the transmission is large, as shown in b. It is completed. Furthermore, since the thickness t ₁ of the transparent glass forming the globe 3 and the coating width t ₂ of the semi-transparent film 9 are processed to have almost the same dimensions, the angle from which the light emerges is approximately 45°. There is. The relationship between t ₁ and t ₂ can be set arbitrarily, and thereby the angle and amount of light emitted can be freely changed. An example of a lighting fixture using the translucent globe 3 will be explained with reference to FIG. 4.The structure of the parts is the same as that of a conventional lighting fixture as shown in FIG. 1, and the light source is located at approximately the center A of the lighting fixture. In the case of light distribution, since a large amount of light emitted from the light source 1 in the horizontal direction passes through the semi-transparent film 9 portion of the translucent globe 3, less light is emitted outward from the lighting fixture. On the other hand, on the translucent glove 3,
As the direction of the light emitted downward increases, more light passes through the non-adhesive area 9a, and as a result, the light distribution of the lighting equipment becomes horizontal as shown in Figure 5. The light distribution is similar in shape, centered on a small vertically protruding light.

Furthermore, when the light source 1 is positioned at the upper part B of the lighting fixture as shown in FIG. 6, the light distribution is as shown in FIG. The amount of light that passes through the non-adhered area 9a, that is, the amount of light that exits downward, is greater than the amount of light that passes through the light film 9, so that less horizontal and upward light is produced, resulting in a light distribution that projects downward.

The conditions for light distribution control obtained by the present invention are explained in detail in _FIG .
The shape of the light distribution is determined by the relationship between t ₂ , the distance X between the translucent globe 3 and the light source 1, and the height Y between the translucent globe 3 and the light source 1. That is, in the case of the embodiment shown in FIG. 3, where the glass thickness t ₁ and the paint coating width t ₂ are almost the same, and the direction of light emission is set to be maximum at 45 degrees, To explain the relationship X/Y between the translucent globe 3 and the light source 1 and the way light is emitted, when X=Y, most of the light emitted in the horizontal direction hits the white paint surface (semi-transparent film 9). Since the transparent glass portion (non-adhesive area 9a) has many directions at 45 degrees, the light distribution is concave horizontally and protrudes upward and downward at 45 degrees, as shown in FIG. In the relationship of X<Y, the amount of light hitting the white paint surface becomes smaller and the amount of light passing through the transparent glass increases, so there is more light directed downward (45 degrees) and it protrudes to the bottom surface as shown in Figure 7. Light distribution can be obtained. In the above embodiment, a semi-transparent film was formed on the glove surface, but the same effect as in the above embodiment can be obtained even if the semi-transparent film is non-transparent.

As described above, according to the present invention, a semi-transparent film or a non-transparent film is coated on the front and back surfaces of a translucent glove so as to cover the non-coated areas on the opposite side, so that, for example, a light source can In the case of a mercury lamp and an outdoor light whose position is X = Y in Figure 8, the light is emitted in the vertical direction, so if it is used especially in an open space with many trees, it will illuminate the green leaves, and the position of the light source will be X = 2Y. Then the bottom side
Since it provides a prominent light distribution in the 45° direction, it can be used as a square light suitable for installation near apartment complexes where overhead light pollution is a problem, and multiple light distributions can be obtained with a single lighting fixture. has advantages. Furthermore, since the globe has a linear striped pattern, it has a simple design and has the advantage of being particularly suited to lighting equipment designed with straight lines.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional lighting device, Fig. 2 is a light distribution curve thereof, Figs. 3 to 8 show embodiments of the present invention, Fig. 3 is a sectional view of a globe, and Fig. 4 The figure is a cross-sectional view of the main part, Figure 5 is a light distribution curve diagram of Figure 4, Figure 6 is a cross-sectional diagram showing a usage state in which the position of the light source is changed, Figure 7 is a light distribution curve diagram thereof, and Figure 8 FIG. 2 is a sectional view of the globe illustrating the relationship between the globe and the light source. In the figure, 1 is a light source, 3 is a globe, 9 is a semi-transparent or non-transparent film, and 9a is a non-adhered area. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A semi-transparent film or non-transparent film is applied to the front and back surfaces of the transparent glass so as to cover the areas where the semi-transparent film or non-transparent film is not applied on the other glass surface, respectively. A glove coated with a film in a striped pattern, comprising a light source disposed within the glove so as to be movable in a direction intersecting the semi-transparent film or non-transparent film coated on the glove. lighting equipment. (2) The semi-transparent film or the non-transparent film is applied in a horizontal position when the glove is used vertically, as set forth in claim 1 of the utility model registration. lighting equipment.