JP2547299Y2 - Magnifying display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an enlarged display device mounted on an automobile, and more particularly, to an enlarged display device using an enlarged lens, and has a structure capable of simplifying the enlarged display device body. The present invention relates to an enlarged display device.

[0002]

2. Description of the Related Art As a conventionally known in-vehicle enlargement display device,
For example, there is a structure as shown in FIG. That is, reference numeral 1 denotes a display main body such as a speedometer, a tachometer, or another display meter provided in front of the driver's seat, and in front of the display 1, the display 1 is enlarged. Are disposed.

[0003] Therefore, when the driver 3 sees through the convex lens 2 and looks through the display main body 1, the display 1 is displayed.
Is enlarged and displayed at the focal position of the convex lens 2, that is, at a distant position. According to this, the display is made at a position far ahead of the eye point of the driver 3. It is possible to reduce the displacement of the line of sight and to expect the ease of operation, and it is also possible to reduce the size of the display main body 1, thereby improving the economy of the display and the facility of the equipment in a small space. It has advantages.

[0004]

However, in such a display magnifying device having the conventional structure, the magnifying lens 2 is not provided.
Since the size of the instrument main body 1 must be set so that the size of the display 4 enlarged and displayed becomes a desired size, it depends on the magnification of the magnifying lens 2, but generally, It is necessary to limit the size of the instrument main body 1 to a small size so that the size of the display 4 is easy to see.

In order to reduce the size of the instrument body 1 in advance in this way, the components of the instrument body 1 must be reduced in size, which makes it difficult to assemble the instrument body 1. Also, by making the instrument main body 1 small, the case volume of the instrument main body 1 also becomes small,
There is a problem that the heat generated by the electric components easily accumulates in the case, and this heat adversely affects the instrument main body 1.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem. An instrument main body is provided with a display such as a scale and a character, and a pointer display using a movement. With a split configuration, each display that is displayed individually is combined and displayed using a half mirror such as a prism, so that each display structure can be simplified and display while suppressing heat generation. The reliability of the
It is another object of the present invention to provide an enlarged display device that can improve durability and economy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In FIG. 2, reference numerals 11 and 12 denote a first display and a second display provided in an instrument frame 13 such as an instrument panel located in front of a driver's seat.
The first display 11 is a movement 1 for speed display.
4, a slit plate 15 fixed to the end of the drive shaft of the movement 14, a light diffusing plate 16 disposed on the back side of the slit plate 15, and disposed on a back side of the light diffusing plate 16. A plurality of illumination spheres 17a, 17b, 1
7c, 17d, 17e, 17f, and 17g. When the illumination spheres 17a to 17g are selectively turned on, a part of the light diffusion plate 16 emits surface light, and the movement 14 is further driven. By transmitting the transmitted light through the narrow slit 24 formed in the radial direction of the slit plate 15, the pointer is displayed as if it were a light emitting needle.

The second display 12 has a display plate 18 provided with transmitted light characters or scales, a light diffusion plate 19 disposed on the back side of the display plate 18, and a light diffusion plate 19 disposed on the back side of the light diffusion plate 16. A plurality of illumination spheres 20 are provided. When the illumination spheres 20 are turned on, characters, scales, and the like provided on the display panel 18 are transmitted and illuminated.

The first display 11 and the second display 12 are arranged at different positions, and the images displayed by the two displays 11 and 12 are synthesized by a prism (half mirror) 21. This composite display image is configured to be displayed in a far-distance view through the Fresnel lens 22.
23 indicates a front cover.

Therefore, in the distant display device of this embodiment, as shown in FIG. 3, a pointer display 24 which is a slit-like transmitted light by the first display 11 and a second display 12
Are synthesized and, for example, the vehicle speed display is enlarged and displayed. Further, in this embodiment, when all of the large number of illumination spheres 20 in the first display are turned on, the amount of heat generated by these illumination spheres 20 increases, and heat is easily trapped in the apparatus. Is controlled so that only the illumination sphere 17 located on the back side of the slit 24 of the rotating slit plate 15 is turned on.

Each of the illumination spheres 17 in the first display, that is, a plurality of illumination spheres 17a, 17b, 17c, 17d,
A control circuit for selectively blinking 17e and 17f in accordance with the operation position of the slit 24 is as shown in FIG. 2, and the control circuit will be described below.

Reference numeral 26 denotes a vehicle speed sensor in a speedometer, and a rotation speed sensor in a tachometer.
Reference numeral 27 denotes an FV conversion circuit for inputting a signal from the vehicle speed sensor (rotation speed sensor) 26. Reference numerals 28a to 28g denote comparison circuits connected to the FV conversion circuit. 28 g of each corresponding lamp 1
7a to 17g are provided.

Each of the comparison circuits 28a-29g
a to 28g, and the driver 2
The lamps 17a to 17g corresponding to 9a to 29g are turned on or off.

Next, the output timing of the comparison circuits 28a to 28g will be described with reference to a time chart shown in FIG.

The graph shows the relationship between the output voltage from the FV conversion circuit 27 and the vehicle speed (rotation speed). As the vehicle speed (rotation speed) increases, the output from the FV conversion circuit 27 also increases. It has become. Each of the comparison circuit outputs 28 corresponding to the output from the FV conversion circuit 16
The signals a to 28g are set to the HI level by inputting a voltage corresponding to the level, and send signals to the drivers 29a to 29g.

The above is the configuration of the present embodiment. Next, the operation will be described. The optical axis in the display of the second display 12 is reflected on the surface of the prism 21 and the first display 11 The optical axis in the display passes through the prism 21 and is refracted at the surface, so that both optical axes coincide with each other and the driver can view the optical axis.

In the first display 11, the slit plate 15 held by the movement 14 is rotated in accordance with the vehicle speed (rotation speed), and the slit 24 is formed by the lamps 17a to 17a.
The illumination light of 7 g is illuminated through the diffusion plate 16 so that the illumination light looks like a light emitting guide.

As can be seen from the operation description based on FIGS. 3 and 4 described above, the selective lighting timing of each of the lamps 17a to 17g corresponds to the lamp corresponding to the back side of the slit 24 portion accompanying the operation of the slit plate 15. Since only the light is selectively turned on, the amount of heat trapped in the first display 11 is reduced, and the adverse effect due to the heat generation of the display 11 can be prevented.

That is, in this embodiment, the slit plate 15
Are illuminated from behind by a plurality of lamps 17a to 17a.
g from the vehicle speed sensor 26 (a rotation speed sensor in a tachometer) such that only the lamps corresponding to the back of the slit 24 of the slit plate 15 are turned on. Is provided, and comparison circuits 28a to 28g connected to the FV conversion circuit 27 are provided with comparison circuits 28a to 28g corresponding to the respective lamps 17a to 17g. Since the drivers 29a to 29g corresponding to the circuits 28a to 28g are provided, there is an effect that the heat generated in the housing is minimized.

[0021]

As described above, the present invention provides a magnifying lens 22
A first display 11 disposed behind the magnifying lens 22 and displaying a pointer by transmitted light; and a first display 11 disposed behind the magnifying lens 22 and displaying transmitted light characters, numerals, and the like. The second display 12 and the magnifying lens 22
A half mirror 21 disposed between the first and second displays 11 and 12 and formed so that a reflection optical axis of the first display 11 and a transmission optical axis of the second display 12 coincide with each other; The first display 11 is rotatably supported by a movement 14 and has lamps 17a to 17
Slit 2 that displays transmitted light in the shape of a pointer by g illumination
Since this is an enlarged display device provided with the slit plate 15 having 4, the display device can be divided and arranged at different positions, so that the structure of each display device can be simplified, This disperses the heat generated inside the instrument main body and reduces the amount of heat acting on the instrument, thereby preventing deterioration of the instrument due to heat.

Furthermore, since the pointer is displayed by the slit transmitted light transmitted from the slit plate without using a self-issued fluorescent light pointer to increase the brightness of the pointer, the electric contact can be eliminated. The effect is obtained that the reliability of the pointer having high brightness can be improved and the manufacturing economy is excellent.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a conventional example.

FIG. 2 is a structural explanatory view of the enlarged display device of the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a lighting control circuit according to the embodiment of the present invention.

FIG. 4 is a flowchart explanatory diagram of the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... 1st display 12 ... 2nd display 13 ... Instrument frame 14 ... Movement 15 ... Slit board 16 ... Light diffusion plate 17a-17g ... Illumination ball (lamp) 18 ... Display plate 19 ... Light diffusion plate 20 ... Illumination sphere 21 ... Prism 22 ... Fresnel lens (magnifying lens) 23 ... Front cover 24 ... Slit 25 ... Character scale display 26 ... Vehicle speed sensor 27 ... FV conversion circuit 28a-28g ... Comparison circuit 29a-29g ... Driver

Claims (1)

(57) [Scope of request for utility model registration] 1. A magnifying lens (22), a first indicator (11) disposed behind the magnifying lens (22) and displaying a pointer by transmitted light, and a magnifying lens (2).
A second display (12) arranged behind 2) and displaying transmitted light characters, numerals, etc., between the magnifying lens (22) and both displays (11) and (12). And a half mirror (21) arranged so that a reflection optical axis of the first display (11) and a transmission optical axis of the second display (12) coincide with each other; Display (11)
Is rotatably supported by a movement (14),
And a slit (2) for displaying transmitted light in a pointer shape by illumination of lamps (17a) to (17g) arranged at the rear.
An enlarged display device, comprising a slit plate (15) having 4).