JPH0119052Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a zone display meter for a vehicle, and particularly to a zone display meter for a vehicle that displays an indicated value in a lighting zone by lighting one or two or more consecutive display segments. be.

Zone display meters are widely used in vehicle tachometers, fuel meters, speed meters, etc., and FIG. 1 shows a conventional vehicle zone display meter 10 applied to a tachometer. There is.

In the figure, the zone display type meter 10 has 12 types of display segments 12-1 to 12 arranged in an array.
-12, and an instruction value is displayed in a lighting zone by lighting one or two or more consecutive display segments 12. And in Figure 1,
Since the display segments 12-1 to 12-6 are lit, it is understood that the engine speed is 3000 revolutions per minute.

However, in conventional vehicle zone display meters, all display segments in a lighting zone light up in the same color, which has the disadvantage that it is difficult to read the display instantly and accurately. For example, in FIG. 1, the display segment 12-6 at the tip of the lighting zone actually indicates the rotation speed, but all the display segments 12-1 to 12-1 of the lighting zone
Since the numbers 6 are lit in the same color, such as green, the number 6 on the display segment 12 at the tip is difficult to read instantly.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to make the display easier to read by lighting the display segment at the tip of the lighting zone in a different color from the other display segments in the lighting zone. An object of the present invention is to provide a zone display type meter for a vehicle that can perform the following functions.

In order to achieve the above object, the present invention selects a certain lighting signal from among a plurality of display segments arranged in an array and lighting signals input corresponding to the display segments in order to light up the display segments. It has a control unit that outputs the information to the display segment side.
In a zone display type meter for a vehicle that displays an indicated value in a lighting zone by lighting one or two or more consecutive display segments, two light emitting elements of different colors respectively provided in each display segment; a first display circuit that connects two adjacent lighting signals among the lighting signals output from the control unit to respective switching elements via exclusive OR gates, and connects the switching elements to each of the light emitting elements; , a second display circuit that connects two adjacent lighting signals among the lighting signals outputted from the control section to each switching element via an AND gate, and connects the switching element to each of the other light emitting elements; The most advanced display segment is lit by a first display circuit, and all the display segments before it are lit by a second display circuit.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 2 shows a state in which the zone display type meter for a vehicle according to the first embodiment of the present invention is applied to a tachometer. In the figure, the display segment 12-4 at the tip of the lighting zone is lit in red, and the other display segments 12-1 to 12-1 in the lighting zone are lit in red.
3 is lit in green, the display segment 12-4 at the tip can be read instantaneously, and it can be easily read that the engine speed is 2000 revolutions per minute.

FIG. 3 shows an enlarged view of the display section according to the first embodiment of the present invention, and FIG. 4 shows its cross section.

In FIG. 4, a diffusion plate 18 is provided on the upper part of the substrate 14 via partition plates 16-1 to 16-13, and display segments 12-1 to 12-12 are arranged as follows.
It is partitioned off by the partition plates 16-1 to 16-13. Inside each display segment 12-1 to 12-12, there are two green LEDs as light emitting elements of different colors.
20G1~20G12, red LED20R1~2
0R12 is provided, and the light of the LED 20 is reflected by the reflective surfaces 16-1a of the partition plates 16-1 to 16-13,
After being reflected by 16-2b, 16-2a to 16-13b, it is emitted to the outside.

In Fig. 4, the green LED 20G
1 to 20G3 and the red LED 20R4 are lit, green light 100G1 to 100G3 and red light 100R4 are emitted to the outside, and therefore, as shown in FIG. 3, the display segment 12-4 at the tip of the lighting zone is lit in red, and the other display segments 12-1 to 12-3 in the lighting zone are lit in green. Therefore, according to the first embodiment, the display segment at the tip of the lighting zone and the other display segments have different colored LEDs, that is, green LEDs.
By lighting the 20G and red LEDs 20R, the display segment at the tip of the lighting zone and the other display segments in the lighting zone can be lit in different colors.

The characteristic feature of the present invention is that two adjacent lighting signals outputted from the control section are connected to respective switching elements via exclusive OR gates, and the switching elements are connected to each of the light emitting elements. a first display circuit connected to the first display circuit, and two adjacent lighting signals output from the control section.
and a second display circuit that connects the respective lighting signals to the switching elements via AND gates, and connects the switching elements to each of the other light emitting elements.

FIG. 5 shows a block circuit of a zone display type meter for a vehicle according to the first embodiment of the present invention, and the display of the lighting zones described above is performed by the block circuit of FIG.

In Figure 5, the second display circuit is a green LED
20G, a switching element 24, and an AND gate 34, and a green color to which a lighting signal 102 is supplied.
The LEDs 20G1 to 20G12 are connected to the transistors 20 through resistors 22-1 to 22-12, respectively.
A red LED 2 connected to the collectors of -1 to 24-12 and supplied with a lighting current 102 in the same way.
0R1 to 20R12 are each resistor 26-1
~26-12 via transistors 28-1~2
8-12 collector. Also,
The IG pulse signal 104 is waveform-shaped by a waveform shaping circuit 32 and then supplied to the CPU 30.
Based on the IG pulse signal 104, the CPU 30
A desired lighting signal selected from lighting signals 106-1 to 106-12 is output.

When the lighting signals 106-1 and 106-2 are simultaneously supplied to the AND gate 34-1, the lighting signals are supplied to the base of the transistor 24-1, and the lighting signals 106-2 and 106-3 are supplied to the base of the transistor 24-1. When simultaneously supplied to the AND gate 34-2, the lighting signal is supplied to the base of the transistor 24-2, and in the same manner, two adjacent lighting signals 106-n and 106-(n+1) are ANDed. AND gate 34 supplies a lighting signal to the base of transistor 24 only when gate 34 is supplied simultaneously. When a signal is input to only one of the AND gates 34, a lighting signal is not supplied to the transistor 24, and as a result, the AND gate 34 lights up all display segments before it except for the most advanced display segment. That will happen.

On the other hand, the first display circuit includes a red LED 20R, a switching element 28, and an exclusive OR gate 36, and when only one of the lighting signals 106-1 and 106-2 is supplied to the exclusive OR gate 36-1, the transistor A lighting signal is supplied to the base of 28-1, and lighting signals 106-2,
When only one of the transistors 106-3 is supplied to the exclusive OR gate 36-2, the transistor 28
A lighting signal is supplied to the base of -2, and in the same manner, two adjacent lighting signals 106-n, 1
06-(n+1) is supplied to exclusive OR gate 36, exclusive OR gate 36 supplies a lighting signal to the base of transistor 28. Therefore, exclusive-OR gate 36 will only illuminate the most advanced display segment.

Therefore, when the lighting signals 106-1 to 106-4 become "H", the AND gate 34-1
~34-3 is open, so transistors 24-1~2
4-3 is turned on, and therefore the green LED 20
G1 to 20G3 are lit, and furthermore, the exclusive OR gate 36-4 is opened, so the transistor 28-4 is turned on, and therefore the red LED 20R4 is lit. As a result, as shown in Figures 3 and 4, the green LEDs 20G1 to 20G3 and the red LED 2
Since 0G4 is lit, the display segment 20-4 at the tip of the lighting zone is lit in red, and the other display segments 12-1 and 12-3 in the lighting zone are lit in green.

As described above, according to the first embodiment of the present invention,
Light-emitting elements of different colors can be lit between the display segment at the tip of the lighting zone and the other display segments.

FIG. 6 shows an enlarged view of a display unit according to a second embodiment of the present invention, FIG. 7 shows a cross section of FIG. 6, and FIG. 8 shows a vehicle according to a second embodiment of the present invention. A block circuit for a zone display meter is shown. In addition, in Figs. 6, 7, and 8, the 3rd, 4th,
Components that are the same as those in FIG.

In the first embodiment described above, display elements of different colors, that is, green LEDs and red LEDs, are lit between the display segment at the tip of the lighting zone and the other display segments, thereby making the display segment at the tip of the lighting zone different from the other display segments. In the second embodiment, the display segment at the tip of the lighting zone and the other display segments are lit with different color light emitting elements, and furthermore, the display segment at the tip of the lighting zone is lit in a different color. , light emitting elements of the same color as the light emitting elements of other display segments are lit. As a result, at the tip of the lighting zone, both light emitting elements are turned on to provide a mixed display, thereby lighting the display segment at the tip of the lighting zone in a different color from the other display segments.

That is, in Figures 6 and 7, the green LED
20G1 to 20G3, the red LED 20R4 is lit, and the green LED 20G4 is lit, so the green light is 100G1 to 100G4, and the red light is 10.
0R4 emits to the outside, so in the display segment 12-4 at the tip of the lighting zone, the green LED
20G4, the red LED 20R4 lights up, resulting in an orange mixed display, and in the other display segments 12-1 to 12-3 in the lighting zone, the green LED
When 20G1 to 20G3 are turned on, the display becomes green. Therefore, by lighting the green LED and red LED in the display segment at the tip of the lighting zone, and lighting the green LED in the other display segments, the display segment at the tip of the lighting zone can be colored in a different color from the other display segments. It becomes possible to turn on the light.

FIG. 8 shows a block circuit for lighting the display segments described above. In the block circuit of FIG. 8, unlike the block circuit of FIG. 5, AND gates 34-1 to 34-12 are connected.
is omitted, and the lighting signals 106-1 to 106-12
is directly supplied to the bases of transistors 24-1 to 24-12. Therefore, the lighting signal 106
-1 to 106-4 become "H", the transistors 24-1 to 24-4 turn on, so the green LEDs 20G1 to 20G4 light up, and the exclusive OR gate 36-4 opens, so the transistors 28-4 is turned on, and as shown in FIG.
-4 lights up in a mixed color of green and red, i.e. orange, and the other display segment 12-4 in the lighting zone
1 to 12-3 will be lit in green.

As described above, according to the second embodiment, by lighting both light emitting elements in the display segment at the tip of the lighting zone to provide a mixed display, and by lighting a single light emitting element in the other display segments in the lighting zone, The display segment at the tip of the lighting zone can be lit in a different color from the other display segments.

In the block circuit of FIG. 8, the lighting current 102 is the green LEDs 20G1 to 20G12,
Although the red LEDs 20R1 to 20R12 are supplied with a two-color display according to the present invention, by supplying the lighting current 102 only to the green LEDs 20G1 to 20G12, the red LEDs stop emitting light and display the same one-color display as in the past. It is also possible to display all display segments of a zone only in green, and both lighting methods can be switched arbitrarily. Of course, at this time, it is also possible to turn on only the red LED 20.

Further, in the first and second embodiments, the present invention was applied to a tachometer, but it can also be applied to a fuel meter, speedometer, etc.

As described above, according to the present invention, since the display segment at the tip of the lighting zone is lit in a different color from the other display segments, the display can be read instantaneously and easily. Furthermore, since the lighting zones are displayed in two colors, the design effect is also improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a state in which a conventional vehicle zone display meter is applied to a tachometer, and FIG. 2 is an explanatory diagram showing a state in which a vehicle zone display meter according to the first embodiment of the present invention is applied to a tachometer. FIG. 3 is an enlarged explanatory view of the display unit according to the first embodiment of the present invention, FIG. 4 is a sectional view taken at - in FIG. 3,
FIG. 5 is a block circuit diagram of a vehicle zone display meter according to the first embodiment of the present invention, FIG. 6 is an enlarged explanatory diagram of the display section according to the second embodiment of the present invention, and FIG. 7 is the same as that shown in FIG. - Cross-sectional view, Figure 8 is the second part of the present invention.
1 is a block circuit diagram of a zone display type meter for a vehicle according to an embodiment; FIG. 10...Vehicle zone display meter, 12-1
~12-12...Display segment, 20G1-2
0G12...Green LED, 20R1~20R12
...Red LED.

Claims (1)

[Claims for Utility Model Registration] A plurality of display segments arranged in an array, and a certain lighting signal selected from among the lighting signals input corresponding to the display segments in order to light up the display segments, and turned on the display segment side. In a zone display type meter for a vehicle that has a control unit that outputs output and displays an indicated value in a lighting zone by lighting one or two or more consecutive display segments, two meters are provided in each display segment. A light emitting element of a different color, and two adjacent lighting signals of the lighting signals outputted from the control section are connected to each switching element via an exclusive OR gate, and the switching element is connected to each one of the light emitting elements. A first display circuit to be connected; and two adjacent lighting signals outputted from the control section are connected to each switching element via an AND gate, and the switching element is connected to each of the other light emitting elements. a second display circuit connected to the display circuit, wherein the most advanced display segment is lit by the first display circuit and all previous display segments are lit by the second display circuit. A vehicle zone display meter featuring: