JP3166143B2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device which is used for a vehicle such as an automobile and has a plurality of display digits to be digitally displayed, and selects and displays one of a plurality of display contents. A display device having a single display unit,
In particular, it relates to the determination of the display content.

[0002]

2. Description of the Related Art Conventionally, a display device having a display unit having a plurality of display digits for performing a numerical display by digital display, a display unit or a display unit corresponding to each display content, based on the display content displayed by the display device. It was displayed near the part. For example, km in the speed display of a speedometer used for a vehicle
It is a unit of rpm in / h and the rotation speed display of the engine tachometer.

In recent years, a display device is provided on a dashboard of a vehicle or the like, and a display image is displayed on a windshield of the vehicle or a reflection plate attached to the display device itself (for example, see Japanese Utility Model Application Laid-Open No. 61-163). − See 12834). When a plurality of different display contents are selected and displayed on a single display unit using this display device, a unit corresponding to each display content is displayed on the display unit.

[0004]

However, in the above-mentioned display device, in order to display which display content is being displayed in a display unit having a limited size, the display device always corresponds to the display content. The display unit itself is displayed small in the limited small display unit because the unit for determining the display content is displayed. Also, there is a problem that the display unit itself is enlarged in order to improve the visibility, and the display device itself is greatly heavier because of using optical components such as a lens, and occupies a large amount of space on the dashboard and inside. there were. Therefore, the present invention
In order to solve the above problems, there is provided a display device which can display a large display content and easily determine which display content is displayed without performing a unit display, despite being a small display device. The purpose is to:

[0005]

SUMMARY OF THE INVENTION The present invention relates to a display device having a display section provided with a plurality of display digits for digital display, wherein one display content is selected from a plurality of display contents and displayed. The use positions of the display digits corresponding to the least significant digit of each display content of the section are displayed differently.

A display device having a display unit provided with a plurality of display digits for displaying one of a display content of an engine speed of a vehicle and a speed of the vehicle and for digitally displaying the display content. In this case, the display digit at least one digit higher than the engine speed display is displayed as the least significant digit.

A display device having a display unit provided with a plurality of display digits for digital display, wherein one display content is selected and displayed from a plurality of display contents, and a lowermost order of each display content of the display unit is displayed. The use position of the display digit corresponding to a digit is displayed differently, the display unit is provided with at least four or more display digits, the rightmost display digit is provided with a display digit for displaying only 0, and the display digit is provided. At least one of the display digits from 0 to 9 is provided as a display digit of an upper digit other than the rightmost display digit.

A display device having a display unit provided with a plurality of display digits for displaying one of a display content of an engine speed of the vehicle and a speed of the vehicle and for digitally displaying the display content. In this case, the display digit at least one digit higher than the engine speed display is displayed as the least significant digit. At least four or more display digits are provided, and only 0 is displayed in the rightmost display digit. Digits are provided, and at least one of the display digits from 0 to 9 is provided as a display digit of an upper digit other than the rightmost display digit.

A display device having a display unit provided with a plurality of display digits for displaying one of a display content of an engine speed of a vehicle and a speed of the vehicle and for digitally displaying the display content. At least four or more,
The rightmost display digit is provided with a display digit for displaying only 0, and the uppermost digit other than the rightmost display digit is provided with a display digit for at least one of 0 to 9 which can be displayed. In the case of (1), the rightmost display digit is used, and in the case of the speed display, the uppermost display digit excluding the rightmost display digit is used.

A display unit which displays a display content of either the engine speed of the vehicle or the speed of the vehicle and has a plurality of display digits for digital display, the display device comprising: In the case of the numerical display, when the display content indicates a value other than 0, the tens display digit and the ones display digit of the engine speed display are always displayed as 0, and in the case of the speed display, the rightmost end is displayed. The speed is displayed from the display digit at least one digit higher than the display digit.

Further, the tens display digit and the ones display digit of the engine speed display are always displayed as 0 and smaller than the other display digits.

[0012]

According to the above configuration, when one display content is selected from a plurality of different display contents and displayed, it is possible to easily determine which display content is being displayed by displaying only the display digits, and the display unit is effective. And a maximum display can be performed, and the visibility is also improved.

In the case of displaying the engine speed, the lowermost digit of the display digit provided on the display unit is used, and in the case of the speed display, the upper digit is used, so that the display content is used. The display content can be determined based on the position of the display digit.

Also, in the case of the engine speed display,
Except for the display of 0, the lower two digits are always displayed as 00, and the display content can be determined.

Further, since the 00 display is displayed smaller than the other display digits, the display contents can be easily determined.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In the first embodiment, the present invention is applied to a display device 2 used in a vehicle 1 such as an automobile.

The display device 2 includes a case 3 having a display unit 4 and a switching unit 5 for switching a plurality of display contents.
In the display device 2, a driver (not shown) operates the switching unit 5 to select and display one arbitrary display content from a plurality of display contents displayed on the instrument device 6 of the vehicle 1. The display device 2 is a reflective display device that can be detached separately from the vehicle 1, and uses power from the cigar lighter R of the vehicle 1. Then, it is provided on the dashboard 7 of the vehicle 1 to minimize the movement of the driver's line of sight, and reflects the display image 9 on the windshield 8 to display the display content. This display image 9 allows the display digit 10 reflected by the display unit 4 and the frame of the display unit 4 to be visually recognized.

The display section 4 of the display device 2 is provided with four display digits 10 as shown in FIG. In the display image 9 in the drawing, the upper three display digits 10 on the left side are composed of a day-shaped segment consisting of seven segments. In the display image 9 in the figure, the rightmost end, that is, the display digit 10 on the lowest digit side is provided with one mouth-shaped segment consisting of one segment. Since the display device 2 is a reflection type display device, the display digits 10 of the actual display unit 4 are arranged such that the display digits 10 are opposite to the display image 9 visually recognized by the driver. In the display unit 4, the display digit 10 indicating the lower digit side is disposed on the left side, and the upper digit is disposed on the right side. In the case of the present embodiment, the lower digit side is set to the right and the upper digit side is set to the left for easy understanding.

The display unit 4 of the display device 2 according to the present embodiment
FIG. 4 is a block diagram showing the circuit configuration of the present embodiment. Reference numeral 11 denotes an SP sensor attached to a rotating member such as an axle (not shown) of the vehicle 1 and generates a pulse signal a according to the speed. Reference numeral 12 denotes a pulse signal attached to an ignition state detecting portion of an engine ignition plug and corresponding to the rotation speed. b, a TA sensor for generating b; counters 13 and 14 for receiving pulse signals a and b, respectively, and counting at predetermined measurement times to obtain count values a 'and b' of pulse signals a and b; A selector 16 for selectively outputting any one of the count values a ′ and b ′ as an output signal c. The selector 16 controls the counting time of the counters 13 and 14 and outputs the output signal c from the selector 15 to the count value a ′. , B ′ for outputting an instruction signal d for selecting one of them, and calculating the speed or the number of revolutions from the output signal c.
U and 17 are ROMs in which a processing program and other necessary information in the CPU 16 are written in advance, 18 is a RAM in which writing and reading necessary for executing the programs are performed,
19 is a display digit of the display unit 4 according to the operation signal e from the CPU 16
A drive section for outputting a drive signal f for displaying segments constituting the display section 10 to the display section 4 as will be described later. For example, the counters 13 and 14 to the RAM 18 comprise a one-chip type IC and constitute a system controller 20. ing.
A switching unit 5 is connected between the CPU 16 and the power supply 21 and includes a switch provided on the case 3.
The driver is configured to be switchable so as to close (ON) when displaying the speed and to open (OFF) when displaying the rotation speed.

In such a configuration, the system controller 20 controls the display on the display unit 4 according to the program shown in FIG. 5 by the CPU 16 determining the state of the switching unit 5.

As shown in FIG. 6, the display on the display unit 4 is a reflection type display device when displaying the engine speed, so that the least significant digit of the display image 9 displayed on the windshield 8 is displayed. However, the rightmost display digit 10 provided in the display unit 4 in the drawing is used as the least significant digit of the engine speed display. As shown in FIG. 7, when the speed is displayed, the display digit 4 which is one digit higher than the display of the engine speed is used without using the rightmost display character digit 10 as viewed in the drawing of the display unit 4.
Use 10 as the least significant digit of the speed display. As described above, since the use position of the display digit 10 for displaying the least significant digit of the display content differs between the engine speed display and the speed display, it is possible to determine which display content is being displayed.

When the engine speed is displayed as shown in FIG. 6, the display of the engine speed is 0 and 50.
0 to 9000 are displayed in 100 increments. In the figure,
2500 is displayed. In the case of speed display as shown in FIG. 7, 0 to 180 are displayed in increments of one.
In the figure, 62 is shown. For this reason, in the case of displaying the engine speed, the display digit 10 corresponding to the last two digits is always displayed as 00, and in the speed display, it is a display form which is hardly used. The content can be determined.

As described above, by using the display digits 10 at different positions according to the display contents, the display contents can be determined by displaying only numerical values without performing a unit display corresponding to the display contents. Therefore, the display unit 4 can be effectively used, and a maximum display can be performed. Further, when displaying the engine speed, the lower two digits are always displayed as 00, and furthermore, the display contents can be determined by numerical values.

As a second embodiment of the present invention, as shown in FIG.
Is the same as that of the first embodiment, except that the display digit 10 on the rightmost end of the display unit 4, that is, the least significant digit side, has half the size of the least significant digit 10 of the first embodiment. One mouth-shaped segment is provided on the upper side.

In the case of this embodiment, when the speed is displayed, the first
In the same manner as the embodiment, when displaying the engine speed, 2400 is displayed in the figure, the display digit 10 corresponding to the lower two digits is always displayed as 00, and the lower two digits are displayed in this case as the upper two digits. The numerical value display is half the size of the display, and the displayed content can be determined.

As described above, by using the display digits 10 at different positions according to the display contents, the display contents can be determined by displaying only numerical values without performing a unit display corresponding to the display contents.

In this embodiment, the mouth-shaped segments are provided on the upper side, but they may be provided on the lower side, which still meet the gist of the present invention.

The display device 2 of each of the above embodiments displays the display content by forming the display image 9 on the windshield 8. However, the display device 2 is not limited to the above-described embodiment. There may be no problem even if a reflection plate is provided on the display unit itself or the display unit 4 can be displayed.

Although the display section 4 of the display device 2 of each of the above embodiments has only four display digits 10, it is not limited to the above embodiment.
When the above is displayed, a display digit for displaying only 1 may be provided on the upper digit side of the display unit 4. In addition, instead of a segment that displays only 0 as the least significant digit on the rightmost end, 7 segments that can display 0 to 9 may be used. May be provided as appropriate.

In addition, any driving method may be used as a driving method of the segments constituting each display digit 10.

[0031]

According to the present invention, when one display content is selected and displayed from a plurality of different display contents according to the above embodiment, the unit display corresponding to the display content is not performed, and only the numerical display of the display digit is performed. , The display content can be determined, the maximum display can be performed on a limited display unit, and good visibility can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a display device according to a first embodiment of the present invention.

FIG. 2 is a front view in which the display device of the embodiment is applied to a vehicle.

FIG. 3 is a front view of the display device of the embodiment.

FIG. 4 is a block diagram showing a circuit configuration of the embodiment.

FIG. 5 is a flowchart in the CPU of the embodiment.

FIG. 6 is a front view showing a rotation speed display of the embodiment.

FIG. 7 is a front view showing the speed display of the embodiment.

FIG. 8 is a front view showing a rotation speed display according to a second embodiment of the present invention.

[Explanation of symbols]

 1 vehicle 2 display device 4 display unit 10 display digit

Continued on the front page (72) Inventor Hitoshi Igarashi 1-1190-1, Fujibashi, Nagaoka-shi, Niigata Nippon Seiki Co., Ltd. R & D Center (72) Inventor Takashi Yamazoe 1-1190, Fujibashi 1-chome, Fujioka, Nagaoka-shi, Niigata Inside the R & D Center of Seiki Co., Ltd. (72) Inventor Osamu Shima Osamu 1-190-1 Fujibashi, Nagaoka-shi, Niigata Prefecture Inside of the R & D Center Nihon Seiki Co., Ltd. (72) Harumi Ota Fujihashi, Nagaoka-shi, Niigata 1-1190-1 Nihon Seiki Co., Ltd. R & D Center (72) Inventor Shuji Sato 1-1190-1, Fujihashi, Nagaoka City, Niigata Prefecture Nihon Seiki Co., Ltd. R & D Center Mitsuo Shiraishi (58 ) Surveyed field (Int.Cl. ⁷ , DB name) G01D 7/00

Claims (7)

(57) [Claims] 1. A display device having a display unit provided with a plurality of display digits for digital display, wherein one display content is selected and displayed from a plurality of display contents, and the lowest order of each display content of the display unit is provided. A display device, wherein the display positions corresponding to the digits are displayed differently. 2. A display device comprising: a display unit having a plurality of display digits for displaying one of a display content of an engine speed of a vehicle and a speed of a vehicle and digitally displaying the display content. A display device, wherein a display digit at least one digit higher than the engine speed display is displayed as a least significant digit. 3. A display device having a display unit having a plurality of display digits for selecting and displaying one display content from a plurality of display contents and digitally displaying, wherein the display unit has at least four display digits. And at least one display digit from 0 to 9 is displayed at the uppermost digit other than the rightmost display digit. The display device according to claim 1, wherein the display device is provided. 4. A display device having a display unit provided with a plurality of display digits for displaying one of a display content of an engine speed of a vehicle and a speed of the vehicle and digitally displaying the display content. At least four or more are provided, and a display digit for displaying only 0 is provided in the rightmost display digit, and at least one of 0 to 9 is displayed in a display digit of an upper digit other than the rightmost display digit. 3. The display device according to claim 2, wherein a digit is provided. 5. A display device having a display unit having a plurality of display digits for displaying one of a display content of an engine speed of a vehicle and a speed of a vehicle and for digitally displaying the display content, wherein the display digits are At least four or more are provided, and a display digit for displaying only 0 is provided at the rightmost display digit, and at least one of display digits from 0 to 9 is provided at an upper digit other than the rightmost display digit. A display device that uses the rightmost display digit in the case of displaying the engine speed, and uses the display digit in the uppermost digit excluding the rightmost display digit in the case of the speed display. 6. A display device, comprising: a display unit that displays a display content of either an engine speed of a vehicle or a speed of a vehicle and includes a plurality of display digits for digital display. In the case of the numerical display, when the display content indicates a value other than 0, the tens display digit and the ones display digit of the engine speed display are always displayed as 0, and in the case of the speed display, the rightmost end is displayed. A display device for displaying a speed from a display digit at least one digit higher than a display digit, excluding the display digit. 7. The display according to claim 6, wherein the tens display digit and the ones display digit of the engine speed display are always displayed as 0 and smaller than the other display digits. apparatus.