JPH11245687A - Multiple display gauge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple display gauge which can provide an analog display unit and a liquid crystal display unit compact in a case, and has a simple structure and a small size. SOLUTION: This display gauge has two sorts of display means of an analog display unit A and a liquid crystal display unit 10. The analog display unit A consists of a transparent disk 1 forming a linear mark 8, a driving roller 2 to drive the transparent disk 1, and a motor 4, the liquid crystal display unit 10 is provided at the rear side of the transparent disk 1, and it is composed to display the scale designs 11, 12, and 13 of the analog display unit A, and an other digital design to its liquid crystal part 10a. The analog display is carried out at the position of the linear mark 8 by the rotating control of the transparent disk 1, while a multifunctional display is carried out by the liquid crystal display unit 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-display instrument, and more particularly, to a multi-display instrument capable of performing analog display using a pointer and multi-function display using a liquid crystal display (LCD).

[0002]

2. Description of the Related Art FIG. 4 shows an example of a multi-function display type instrument capable of performing analog display by hands and digital display by a liquid crystal display.

A light guide plate 15 provided on the back side of a case 14
A movement 17 is attached to the rear of the light guide plate 15.
Pointer 1 attached to the axis of movement 17 at the front of
8 are arranged to constitute an analog display instrument 20.
The liquid crystal display unit 10 is mounted on the upper side of the case 14. At the intersection between the front of the analog display instrument 20 and the lower part of the liquid crystal display unit 10, 45
A half mirror 19 that is inclined at an angle is arranged.

When the scale design and the pointer 18 on the surface of the light guide plate 15 are illuminated by the backlight 16, an analog display by the pointer 18 can be seen from the front through the half mirror 19. When the backlight 16 is turned off, the display of the liquid crystal display unit 10 is reflected on the half mirror 19, and the digital display and other multifunctional displays by the liquid crystal display unit 10 can be seen.

[0005]

In the above-mentioned instrument, the analog display instrument 20 and the liquid crystal display unit 10 are arranged at right angles, and the half mirror 19 is attached to the intersection thereof. Since the display unit 10 is located at a distant position, the configuration becomes large as a whole, and since the half mirror 19 is used, the number of parts is large and the configuration is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a multiple display instrument in which an analog display unit and a liquid crystal display unit are arranged compactly in a case, and have a simple structure and a reduced size. Aim.

[0007]

According to a first aspect of the present invention, there is provided a multi-display instrument having two types of display means, an analog display unit and a liquid crystal display unit. Comprises a transparent disk on which linear marks are formed, and driving means for driving the transparent disk, wherein the liquid crystal display unit is disposed on the rear surface of the transparent disk, and the scale of the analog display unit is provided on a liquid crystal portion thereof. A design and another digital design are configured to be displayed.

Therefore, according to the first aspect of the present invention, the analog display displays a predetermined position of the scale design displayed on the liquid crystal portion by rotating the transparent disk by the driving means and moving the linear mark. The digital display is displayed by switching to the display by the liquid crystal display unit.
At this time, the linear mark is retracted from above the liquid crystal portion by the rotation of the transparent disk, and the digital design displayed on the liquid crystal portion can be visually recognized through the transparent disk.

Further, since the analog display unit is constituted by a transparent disk which is rotated by a driving roller, and the liquid crystal display unit is provided on the back surface of the transparent disk, the analog display unit has both easy-to-view analog display and multi-function display by the liquid crystal display. In addition, the multi-display instrument can be made compact without taking up much space.

According to a second aspect of the present invention, there is provided the multiple display instrument according to the first aspect, wherein the linear mark has a fine uneven surface for irregularly reflecting light, and is arranged on an outer periphery of the transparent disk. The light is emitted by the light from the light source.

Therefore, according to the second aspect of the present invention, the analog display which can be easily viewed by the reflected light of the linear mark of the transparent disk can be performed, and the structure is simplified because the movable pointer is not required.

According to a third aspect of the present invention, there is provided the multiple display instrument according to the first or second aspect, wherein the driving means for the transparent disk includes a driving roller and a driven roller for holding an outer periphery of the transparent disk; And rotation control means for controlling the rotation of the drive roller.

According to the third aspect of the present invention, the transparent disk is supported and driven on the outer peripheral portion, and the entire central portion can be effectively used as a display surface.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The same members or those having the same functions as those in FIG. 4 are denoted by the same reference numerals.

1 and 2, a transparent disk 1 for an analog display unit A is supported at three places by a driving roller 2 and a driven roller 3 supported by a case 14. The drive roller 2 is connected to a drive motor 4 such as a step motor or a servo motor. The transparent disk 1 can be seen from the opening 14a of the case 14.

The drive motor 4 rotates under the control of a control circuit (not shown). Transparent disk 1
An origin mark 5 is provided on the outer peripheral edge of the origin mark 5.
Is detected by the photo interrupter 6 and the rotation angle from that position is instructed to the drive motor 4 from the control circuit,
The driving roller 2 is configured to be accurately rotated by a predetermined angle.

A light source 7 is provided near the outer periphery of the transparent disk 1. On the surface of the transparent disk 1, a linear mark 8 serving as a pointer of a pointer instrument is formed. The linear mark 8 is configured to reflect light and emit light. As shown in FIG. 3, fine irregularities 9 are formed on the transparent disk 1 so that light from the light source 7 is irregularly reflected. ing. The means for forming the fine irregularities 9 is to engrave a bead-like surface in a groove carved in the surface of the transparent disk 1, embed a glass bead, or attach a thin tape in which a glass bead is embedded. etc,
You may comprise by arbitrary means.

A liquid crystal display unit 10 for digital display and other multi-function display is mounted on the back surface of the transparent disk 1. The liquid crystal display unit 10 has a liquid crystal part 10a on the transparent disk 1 side and a control part 10b on the rear part thereof. The liquid crystal part 10a has a scale design such as a scale 11, a numeral 12, a character 13 and the like as a background of an analog display and the like. Digital design is displayed.

The drive motor 4 is rotated by a signal from the control circuit, and the transparent disk 1 is rotated according to the rotation angle to move the linear mark 8. The linear mark 8 emits light by the light of the light source 7, and the scale design 1 displayed on the liquid crystal unit 10a.
The predetermined portions 1 and 12 are displayed. The type of display by the analog display unit A is arbitrary. For example, a speedometer, a tachometer, or the like is displayed for a vehicle instrument. When the display is performed by the analog display unit A, the digital display by the liquid crystal display unit 10 is not performed.

When the display is switched to digital display by the liquid crystal display unit 10 by a switch operation or the like, the light source 7 is turned off and the scale design 1 displayed on the liquid crystal unit 10a is displayed.
1 and 12 disappear and digital display is performed by the liquid crystal display unit 10. At this time, the linear marks 8 on the transparent disk 1 are not on the screen of the liquid crystal unit 10a (FIG.
(The position of the dashed line 8a).

The type of digital display by the liquid crystal display unit 10 is arbitrary. For example, digital display of vehicle speed or display of various vehicle information (sonar, navigation, warning, inspection items, etc.) is performed. Analog display unit A to liquid crystal display unit 1
0 or the liquid crystal display unit 10
The switching from to the analog display unit A is performed by a driver's switch operation. For example, when watching the speedometer display on the analog display unit A which is simple and easy to see, the switch may be switched to the liquid crystal display unit 10 to view the navigation.

As described above, in the multiple display instrument of the present embodiment, the analog display section A is constituted by the transparent disk 1 rotated by the drive roller 2, and the liquid crystal display unit 10 is provided on the back surface of the transparent disk 1. With this configuration, a multi-display instrument having both analog viewability and multi-function display using a liquid crystal display can be realized without taking up much space.

Further, both digital display by a liquid crystal display through the transparent disk 1 and analog display by the linear marks 8 on the transparent disk 1 are possible, and a movable pointer, a dial and the like are not required. In addition to simplification, all parts are compactly arranged in one case 14, so that a miniaturized multiple display instrument can be obtained.

[0024]

As described above in detail, according to the first aspect of the present invention, the analog display unit is constituted by a transparent disk rotated by a driving roller, and a liquid crystal display unit is provided on the back surface of the transparent disk. Therefore, the transparent disk and the liquid crystal display unit can be compactly arranged in a superimposed state, and the number of parts is small because there is no need for movable pointers and dials. And a multiple display instrument having a simple structure can be formed simply and in a small size.

Further, according to the second aspect of the present invention, the linear mark of the transparent disk is formed as a fine irregular surface which irregularly reflects light and emits light by the light from the light source. In addition to the effect, an analog display that is easy to see with the reflected light of the linear mark on the transparent disk can be provided.

According to the third aspect of the present invention, since the outer periphery of the transparent disk is supported by the driven roller and the driving roller, in addition to the effects of the first or second aspect,
The transparent disk is supported and driven at the outer peripheral portion, and the entire central portion can be efficiently used as a display surface.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a multiple display instrument of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a cross-sectional view illustrating an example of a linear mark.

FIG. 4 is a sectional view of a conventional multiple display instrument.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent disk 2 Drive roller 3 Follower roller 4 Motor (drive means) 7 Light source 8 Linear mark 9 Fine uneven part 10 Liquid crystal display unit 10a Liquid crystal part 10b Control part 11, 12, 13 Scale design 14 Case A Analog display unit

Continuation of the front page (51) Int.Cl. ⁶ Identification code FI G01D 7/00 301 G01D 7/00 301A 11/28 11/28 P 13/04 13/04 Z 13/22 101 13/22 101 13/28 13/28

Claims (3)

[Claims] 1. A multiple display instrument having two kinds of display means, an analog display unit and a liquid crystal display unit, wherein the analog display unit drives a transparent disk on which a linear mark is formed, and the transparent disk. The liquid crystal display unit is arranged on a rear surface of the transparent disk, and a scale design and another digital design of the analog display unit are displayed on a liquid crystal portion thereof. Multiple display instrument. 2. The linear mark according to claim 1, wherein the linear mark has a fine uneven surface for irregularly reflecting light, and emits light by light from a light source arranged on an outer periphery of the transparent disk. Multiple display instrument. 3. The transparent disk drive means comprises a drive roller and a driven roller for holding an outer periphery of the transparent disk, and a rotation control means for controlling the rotation of the drive roller. 2. The multiple display instrument according to 2.