JPS5848697Y2 - bar indicator - Google Patents

Description

[Detailed explanation of the idea] This invention relates to bar indicators.

For example, there is a bar indicator made of a fluorescent display tube as shown in FIGS. 1a and 1).

The bar indicator shown in the figure is used as a VU meter, and an envelope 1 is constituted by a substrate 1a and a face glass 1b sealed over the main surface of the substrate 1a.

An insulating film 2 is deposited on the surface of the substrate 1a within the envelope 1, and a display section 3 is formed on the surface of the insulating film 2.

As shown in FIG.
A plurality of fluorescent segments 3b are arranged in parallel along the longitudinal direction of the scale part 3a above and below the scale part 3a up to dB.

Each fluorescent segment 3b has its end adjacent to the scale part 3a uniformly aligned, and is arranged side by side with its longitudinal side aligned with the direction orthogonal to the longitudinal direction of the scale part 3a. The length on the side is short and the length on the positive side is long.

Furthermore, each fluorescent segment) 3b is composed of an electrode adhered to the insulating film 2 and a fluorescent material formed on the upper surface of this electrode, and the electrodes of each fluorescent segment 3b are mutually connected to each other via the scale portion 3a. The opposing one is the wiring layer 4 under the insulating film 2.
Each wiring layer 4 is connected to a terminal 5' attached to the edge of the substrate 1a.

A mesh-shaped grid electrode 5 is disposed on the display section 3 so as to face the display section 3, and is supported by the substrate 1a.

Moreover, above this grid electrode 5, this grid electrode 5
A filament 6 stretched along the longitudinal direction is arranged, and both ends of the filament 6 are supported by supports 7 fixed to the substrate 1a.

Note that the grid electrode 5 and the filament 7 are each led out to a terminal 5' by a wiring layer under the insulating film 2.

However, an indicator constructed in this way is −
The fluorescent segment 3b is made to emit light continuously from the 40 dB side to the numerical value to be displayed.
In particular, when displaying positive dB, as shown in Figure 3, the fluorescence segments corresponding to OdB) 3b" and 3b"' on the negative side close to 3b' are shortened due to an illusion. This has the disadvantage that the overall display appearance is impaired.

In view of the above points, this invention was made to solve such problems and eliminate such drawbacks, and its purpose is to provide a bar indicator with improved display appearance.

This invention will be explained in detail below using examples.

FIG. 4 is a block diagram showing an embodiment of the display section of the bar indicator according to this invention.

In the same figure, among the fluorescent segments (3b) arranged in parallel, the negative fluorescent segments (3b) and (3b) which are close to the fluorescent segment (3b) corresponding to OdB correspond to OdB, respectively. Fluorescent segment) The length is made slightly longer in the direction approaching 3b'.

With this configuration, even if the fluorescent segment) 3b is made to emit light continuously up to positive dB starting from the -40 dB side,
Even if the fluorescent segments 3b'', 3b'' on the negative side that are close to the fluorescent segment (corresponding to OdB) 3b' appear shorter due to an illusion, the fluorescent segment l-3b'' that appears shorter in advance. , 3b", the lengths of the fluorescent segments on the negative side and the fluorescent segments on the positive side can be clearly seen in steps, as shown in Figure 5. As a result, the overall display appearance can be made extremely good.

In this embodiment, the fluorescent segment) 3b is replaced by the scale part 3a.
These fluorescent segments are arranged in a row with the fluorescent segments in between, and the opposing fluorescent segments emit light together.
b may be arranged in a row on one side of the scale 3a.

Furthermore, as shown in Fig. 6, this method also applies to a plurality of fluorescent segments whose longitudinal sides coincide with the direction perpendicular to the juxtaposed direction, and which are arranged so that both ends thereof have a stepped portion. It goes without saying that the ideas can be applied.

Although the embodiment describes a static drive type fluorescent display tube, each fluorescent segment is divided into a plurality of groups, each group is provided with an independent grid electrode, and each group's corresponding It may also be of a dynamic drive type in which fluorescent segments are commonly connected.

In addition, although this embodiment has been described as being composed of a fluorescent display tube used as a VU meter, the scale section 3a
It may also be used as another meter by changing the
Furthermore, other display configurations in which light-emitting segments are formed by diodes or discharges may be used.

As described above, this invention is explained using the fluorescent segment 3b' corresponding to QdB.
The explanation has been given by taking as an example a case in which the lengths of the fluorescent segments ()-3b" and 3b"' on the negative side adjacent to the fluorescent segment ()-3b' are gradually lengthened in the direction approaching the fluorescent segment)-3b'. (including, but not limited to, the above-mentioned fluorescent segments)
3 b", 3 b"' may be one or more, for example 1 to 3.

As described above, according to the bar indicator according to the invention, the overall display appearance can be improved, so the practical effects are extremely large.

[Brief explanation of drawings]

Fig. 1 a, l) and Fig. 2 are explanatory diagrams showing an example of a conventional bar indicator, Fig. 3 is an explanatory diagram showing the drawbacks of the conventional bar indicator, and Fig. 4 is an explanatory diagram of the bee indicator according to this invention. FIG. 5 is a diagram for explaining the effect of the display section, and FIG. 6 is an explanatory diagram showing another embodiment of the display section of the bar indicator according to this invention. be. 1... Envelope, 1a... Substrate, 1b.
...Face glass, 2...Insulating film, 3
...Display section, 3a...Scale section, 3
b... Fluorescent segment, 4... Wiring layer, 5... Grid electrode, 6... Filament, 7... Support.

Claims (1)

[Scope of utility model registration request] The light-emitting segment group includes a plurality of light-emitting segments arranged in parallel, and the light-emitting segment group is composed of at least two groups, and each light-emitting segment of one group is equal to the light-emitting segment of each light-emitting segment of the other group. The length of one or more light emitting segments close to the other group among the light emitting segments related to the one group is formed to be shorter than the length of the light emitting segments related to the one group. A bar indicator characterized by having a longer length than the bar indicator.