JPS5831051Y2 - Automotive data central display device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automobile data centralization display device that centrally displays various data such as automobile fuel efficiency and vehicle speed.

Generally, when a car displays various data such as fuel efficiency, remaining fuel level, drivable distance, average vehicle speed, and elapsed time according to the driver's needs, each data display is switched and displayed on a single display. It happens.

In this case, it is difficult to determine what kind of data the display data is simply by displaying it on the display unit, so information specifying the type of data such as fuel efficiency, vehicle speed, etc. should also be displayed. is desirable.

However, when both the data type designation information and the data are displayed on a display element, the number of display digits increases and the circuit configuration becomes complicated.

This idea was made in view of the above situation,
Data type designation information is displayed by a character wheel, one data is selected from a plurality of data groups according to a binary code signal corresponding to the rotational position of this character wheel, and this is displayed on a data display element. By doing so, it is an object of the present invention to provide a data intensive display device for an automobile in which the display element only displays data.

An embodiment of this invention will be described below with reference to the drawings.

1 to 3 show the structure of a data central display device according to an embodiment of this invention. In the figures, 1 is a display panel, 2 is rotatably attached to the display panel 1, and l","Remaining fuel amount t"■Multiable distance axis〃,
A character wheel in which data type designation information such as "average vehicle speed Km/h" and "elapsed time h" are written in order in the circumferential direction, 3 is one of the plurality of data type designation information written in character wheel 2.
A display window provided on the display panel 1 to read the information from the outside;
4 is a ratchet attached to the side surface of the character wheel 2; 5 is a solenoid whose pawl 5a engages with the teeth 4a of the ratchet 4 and rotates the ratchet 4 counterclockwise in FIG. 3; and 6 is a solenoid that drives the lever 5; 7 is formed on the left side of the character wheel 2,
This is a contact part that gives a binary code signal corresponding to the rotational position of the character wheel 2 to the binary code switch 8. This contact part 7 sends a signal to each digit corresponding to the four brushes 8a of the binary code switch 8. Each band-shaped portion 7a has a potential of ＼＼0.
//, the other portion 7b is kept at the potential 'Xv'.

Bud 9 is located on the display panel 1 adjacent to the right side of the character wheel 2 in Figure 1.
A display window provided on the display panel 1 is used to read/stop the display on the digital fluorescent display tube 9 as a data display element attached to the display panel.

FIG. 4 shows an electrical circuit diagram of this data central display device. 11 is a selection switch whose one end is connected to a DC power supply (10V), and by pressing this selection switch 11, the solenoid 6 is activated. By turning on electricity and rotating the character wheel 2 one step at a time, desired data type designation information can be seen on the display window 3.

12 is a pulse oscillator; 13 is an AND gate that uses the output of the pulse oscillator 12 and the output of the selection switch 11; and 14 is a DC power supply (10 V ) is applied to rotate the character wheel 2 by one step, and 15 compares the 4-bit detection output of the binary code switch 8 of the character wheel 2 with the 4-bit output of a counter 18, which will be described later. Comparator that outputs \1 when both match, 16
17 is a pulse oscillator; 17 is an AND gate that uses the inverted output of the comparator 15 and the output of the pulse oscillator 16; 18 is a counter that counts the output pulses of the AND gate 11; and is reset by the output of the selection switch 11; 19a ~19e is p'y for each of the plurality of data type designation information -+1. v'C corresponding i'itm1. l
A data generation section that generates data, 20 is a comparator 1
21 is a multiplexer that switches and outputs the output data of the data generators 19a to 19e from the 4-bit output of the printer 18 (n is the output data of the data generator 19a to 19e), and 21 displays the output data of the multiplexer 20 with a fluorescent display. This is a driver for displaying on the tube 9.

Next, operation r will be explained.

Suppose that the ▗□-shaped wheel 2 is at a certain rotational position, and data type designation information other than fuel efficiency is visible from the display window 3 of the display panel 1.

In this state ('), if you turn on the selection switch 11,
When a pulse is output from the pulse oscillator 12, the transistor 14 is turned on, and DC power (+V) is applied to the solenoid 6fAT.

Then, the solenoid 6 is actuated to move the lever -5 to the position shown in FIG.

As a result, the pawl 5a of the lever 5 moves to the left in the figure, meshing with the teeth 4a of the ratchet 4 7, and the solenoid 6
When the energization of -\ is stopped and the lever 5 returns to its original position, the pawl 5a meshes with the tooth 4a on the right.

Therefore, each time the solenoid 6 is energized, the ratchet 4 and the character wheel 2 are rotated counterclockwise in FIG. 3 by one tooth.

Then, repeat this operation several times and display window 3 of display panel 1.
When the display of "fuel consumption Km/l" appears as shown in FIG. 2, the selection switch 11 is turned off to stop the above operation.

At this time, the rotational position of the character wheel 2 is detected by the binary code switch 8 and input to one of the comparators 15.

On the other hand, the counter 18 is reset when the selection switch 11 is turned on for the final rotation of the character wheel 2, and the binary code signal detected by the binary code switch 8 and the output of the counter 18 are Comparator 1 unless there is a match
Since the output Q of 5 is \0, the AND gate 1γ passes the output pulse of the pulse oscillator 16 through the 11, and the counter 18 counts the pulses.

When the counter 18 counts the output pulses of the pulse oscillator 16 and its output matches the detection output of the binary code switch 8, the comparator 15 outputs a "1" sound t~, and the output pulse of the pulse oscillator 16 is an AND gate. 17 and no clock pulse is input to the counter 1BVC, the output of the counter 18 stops when it matches the detection output of the binary code switch 8.

On the other hand, the data generation units 19a to 19e contain the characters If! , 2 generates measurement data corresponding to the data type designation information stored in the display window of the character wheel 2 according to a binary code signal manually inputted from the counter 18 to the multiplexer 20. The data type designation information that can be read from 3, that is, the 11 rules data for fuel efficiency, is sent to multiplexer 2.
0, the selected output signal 2 is displayed on the fluorescent display tube 9 via the driver 21.

In this way, data corresponding to the data type designation information viewed through the display window 3 is automatically displayed on the fluorescent display tube 9 and viewed through the display window 10.

This device (according to 2) can switch and display data of many types with just the display tube, so it saves space, and the information for specifying the type of display data is written separately. Since the display is 1-, the number of display digits does not increase, and it can be realized with a simple circuit configuration.

Additionally, this invention is not limited to the above-mentioned embodiment, but includes a comparator 15, a counter 18, etc. for selecting one data from a plurality of data groups according to the output of the binary code switch. Other circuit configurations may be used for the circuit configurations of the portions.

As described above, the automobile data central display device of this invention includes a character wheel in which data type designation information is written and a data display element that displays the amount of data, and the rotating position of the character wheel is controlled by the character wheel. The data is detected by a binary code switch that contacts the contact portion of the data type, and data is selected from the data group corresponding to the data type designation information according to the output of the binary code switch and displayed on the display element. This has the effect of being able to switch and display various types of data on the display with a simple circuit configuration.

[Brief explanation of the drawing]

FIG. 1 is a cutaway plan view of a data central display device for an automobile according to an embodiment of this invention, and FIG. 2 is a front view of a display panel.
FIG. 3 is a cutaway side view of FIG. 1, and FIG. 4 is an electrical circuit diagram of the device. 1...Display panel, 2...Character wheel, 8
. . . Binary code switch, 9 . . . Data display element, 20 . . . Multiplexer as a selection circuit.

Claims (1)

[Scope of utility model registration request] A character wheel with a plurality of data type designation information written thereon and rotatably attached to the display panel and a contact portion of the character wheel are contacted to detect the rotational position of the character wheel as a binary code signal 2 a binary code switch; a selection circuit for selecting one data according to the output of the binary code switch from among a plurality of data groups respectively corresponding to the plurality of data type designation information; and a selection circuit adjacent to the character wheel. A data central display device for an automobile, comprising a data display element attached to a panel and displaying output data of the selection circuit.