JPS643174Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a compact fluorescent lamp device suitable for use as a display pixel of a color display device, for example.

In recent years, small, single-ended fluorescent lamp devices have been developed as display pixels for large color display devices, but conventional small fluorescent lamp devices have electrodes at both ends of the bulb, so the bulb is When used as a display pixel that requires light to be emitted from the tip axis in the axial direction, the electrode casts a shadow, making it impossible to provide a clear display.In addition, a large number of small fluorescent lamp devices are used in one display device. , the hue of individual compact fluorescent lamp devices,
When brightness, chroma, etc. differ slightly, a problem arises in that uniform display cannot be performed.

Furthermore, when a compact fluorescent lamp device is used as it is with white light, there is a problem in that it is difficult to easily distinguish when the lamp is on and when it is off, especially in bright daytime areas.

The purpose of this device was to be able to emit clear, shadow-free light only in the forward direction, to make the hue and saturation uniform, and to be able to clearly distinguish between when the light is on and when it is off. We aim to provide fluorescent lamp equipment.

In order to achieve the above-mentioned object, this invention includes a compact fluorescent lamp device including a sealed bulb with an exhaust pipe provided at one end, a stem provided at one end within the bulb, and a pair of pairs on the stem. A coiled filament-shaped cathode is installed via a cathode support lead wire, and the cathode is attached at a small distance from the cathode via an anode support lead wire, which is also shorter than the cathode support lead wire, on the stem. It consists of an anode attached to the bulb, an opaque cylinder attached to the outer periphery of the bulb with its tip side open, and a translucent filter plate attached to the tip of the tube.

This invention will be explained in detail below based on the drawings. FIG. 1 shows a compact fluorescent lamp 1, and FIG. 2 shows a compact fluorescent lamp device equipped with this compact fluorescent lamp 1. As shown in FIG. The small fluorescent lamp 1 has a sealed cylindrical bulb 2 with a diameter of about 9 mm and a length of about 20 mm. A stem 3 is provided at one end of the valve 2, and an exhaust pipe 4 whose distal end is connected to the stem 3 and whose lower end is sealed is formed. Three cathode supporting lead wires 5a, 5b and an anode supporting lead wire 5c are provided upright on the stem 3. A coil filament 6 coated with an electron emitting substance is installed between the cathode supporting lead wires 5a and 5b.
This coil filament 6 constitutes a cathode. On the other hand, an anode 7 is formed on the anode support lead wire 5c at a small distance of about 3 mm from the coil filament 6. A getter 8 that emits mercury vapor by high-temperature heating is attached to the anode support lead wire 5c. External lead wires 9a, 9b, 9c are led out from the stem 3, and these external lead wires 9a to 9c are connected to cathode support lead wires 5a, 5b and anode support lead wire 5c, respectively, inside the stem 3. There is. The other end of the bulb 2 is formed in the shape of a hemispherical shell, and a fluorescent material 10 is attached to the inner surface from this end to the middle part. The fluorescent material 10 absorbs ultraviolet rays emitted from mercury deposition during discharge and emits visible light. This visible light may be white, but it is preferable to emit light of a color as close as possible to the desired color. For example, if the desired color is red, which is one of the three color elements, the device is configured to emit light in a color as close as possible to red, for example, pink.

In FIG. 2, reference numeral 11 denotes a support stand, and this support stand 11 has a plurality of support wall parts 11a on its peripheral edge, and three terminals 12 are attached to its bottom. The above-described compact fluorescent lamp 1 is supported by bringing the end of the bulb 2 into contact with the support wall 11a and by connecting the external lead wires 9a to 9c to terminals 12, respectively.

A metal reflector tube 13 is attached to the circumference of the bulb 2 of the small fluorescent lamp 1. Further, an opaque resin cylinder 14 is provided around the outer periphery of the reflection cylinder 13. A plurality of elastic pieces 15 are formed at the end of the cylinder 14, and the projections 15a of the elastic pieces 15 are connected to the recesses 11b formed in the support base 11.
The cylindrical body 14 is supported by the support base 11 by engaging with the support base 11 . A translucent filter plate 20 is adhered to the open end of the cylindrical body 14 . The filter plate 20 is made of resin mixed with a coloring agent of a desired color, for example, red.

In the above configuration, the pink light emitted from the small fluorescent lamp 1 is reflected by the reflecting tube 13 and emitted from the tip of the bulb 2, and reaches the red filter plate 20, where the pink light with a wavelength corresponding to red is emitted. Only the light passes through the filter plate 20. In this way, the compact fluorescent lamp device of this example can emit red light.

Further, since the fluorescent substance 10 generates pink light close to red, the light transmittance through the filter plate 20 is relatively high, and a large decrease in luminous efficiency can be avoided. Further, since the compact fluorescent lamp 1 is housed in a space that is almost sealed by the cylinder 14, the filter plate 20, and the support base 11, it is well kept warm and can provide stable discharge and light emission.

Note that this invention is not limited to the above-mentioned embodiments and can be modified in various ways. For example, as shown in FIG. 3, an annular wall portion 21 may be formed at the peripheral edge of the filter plate 20, and this wall portion 21 may be attached to the outer circumferential surface of the open end of the cylindrical body 14.
Note that the wall portion 21 may be formed to have a smaller diameter than the disk portion of the filter plate 20 and may be attached so as to be in contact with the inner circumferential surface of the open end of the cylindrical body 14. In addition, wall part 2
1 and the end of the cylindrical body 14 may be screwed together.

In the example shown in FIG. 4, a plurality of elastic pieces 22 are formed on the peripheral edge of the filter plate 20, and the elastic pieces 22
The filter plate 22 is attached by engaging the protrusion 22a formed at the tip of the cylindrical body 14 with the annular groove 13 formed on the outer peripheral surface of the open end of the cylindrical body 14.

Further, the filter plate may be used not to obtain a desired color, but to clarify the difference in brightness and darkness when the light is turned on and off. In this case, the filter plate is formed in a color such as pale dark gray, dark blue, dark brown, dark green, etc. (a color generally called smoke). In this configuration, since the display is darkened by the filter plate when the light is off, the difference in brightness and darkness when the light is on and off becomes clear even in a bright environment such as outdoors.

Since this invention is constructed as described above, it can achieve the following effects.

Since all the electrodes are provided only at the bottom end of the bulb, it has a structure just like a white light bulb, and even when emitting light from the tip of the bulb, it does not need to be provided at the tip side of the bulb like in the conventional case. The electrodes do not cast shadows and can emit clear light.

Since the bulb is equipped with a cylindrical body made of opaque material with the tip open, the light emitted inside the bulb is not diffused around the bulb and is emitted only toward the tip of the bulb. It is possible to provide a sharp and clear display.

Furthermore, a filter plate made of a material that transmits light is attached to the open end of the bulb, so by selecting the color of the filter plate, light with a stable and uniform hue, brightness, and saturation is directed forward. In addition to being able to emit light, it also makes it possible to clearly distinguish between when the lights are off and when the lights are on.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of this invention,
Figure 1 is a partial cross-sectional view of a small fluorescent lamp, Figure 2 is a cross-sectional view of the entire compact fluorescent lamp device, and Figures 3 and 4 are cross-sections of main parts showing different aspects of the filter plate. It is a diagram. 1...Small fluorescent lamp, 9a, 9b, 9d...
External lead wire, 12...pin terminal, 14...cylindrical body, 20...filter plate.

Claims (1)

[Scope of utility model registration request] a valve sealed with an exhaust pipe at one end;
A stem provided at one end of the bulb, a coiled filament-shaped cathode installed on the stem via a pair of cathode support lead wires, and a coil filament cathode that is shorter than the cathode support lead wires also on the stem. an anode attached at a small distance from the cathode via an anode support lead wire; an opaque cylindrical body attached to the outer periphery of the bulb with its tip side open; 1. A compact fluorescent lamp device comprising a light-transmitting filter plate attached thereto.