JPH0585224A - Display device - Google Patents

Abstract

(57) [Abstract] [Purpose] Gives a sense of perspective to the displayed image and enhances the distance display function. [Structure] The display 2 is provided in the case 1, and the display 2
The condensing lens 7 for forming the display image 2A of 3) in the depth direction and displaying the distance is provided. An opening window 8 is provided in front of the optical path of the display 2.
The frame body 9 having the above is provided, and the glitter portion 11 for diffusing a part of the display light 10 of the display 2 spread is formed on the periphery of the opening window 8. [Effect] With the condensing lens 7, the display image 2A of the display 2 displayed at a distance and the image 11A of the bright portion 11 in front of the display 2 are displayed.
And are visually recognized due to a difference in perspective.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying a display image on a display device at a distance.

[0002]

2. Description of the Related Art Conventionally, in a display device for a vehicle, driving information such as vehicle speed and remaining amount of fuel and information such as time have been displayed by instruments provided on an instrument panel. Is displayed in the distance, the focus by the eye adjustment function is compared with the one in which the display content displayed on the display is directly viewed when checking the display value of the display while gazing at the distance while the vehicle is traveling. Various display devices have been proposed which facilitate the adjustment, and in particular, enable the elderly to read the display value quickly with a weakened eye adjustment function. As a display device of this type, for example, by projecting a display image of a display device on a projection member in front of the driver, for example, on a windshield or a combiner formed by vapor deposition or coating on the windshield, the display image is displayed outside the windshield. Disclosed in, for example, Japanese Utility Model Laid-Open No. 63-81721, is a display device, which is so-called a head-up display, which is imaged in the front visual field of the vehicle and displayed at a distance so that the displayed image and the landscape in the visual field appear to overlap each other. Has been done.

Further, an optical means such as a concave lens or a condenser lens is provided on the front side of the instrument for displaying the display image of the instrument provided on the instrument panel in a distant manner, and the display of the indicator is displayed by this optical means. Vehicle display devices configured to form an image in the depth direction of an instrument and display it in the distance are disclosed in Japanese Utility Model Publication No. 62-105822 and Japanese Utility Model Publication No. 63-19.
Japanese Patent No. 5929 is disclosed.

[0004]

However, in the above-mentioned conventional example, the display image is displayed at a distance by a head-up display for projecting the display image of the former display device on the projection member and an optical means provided on the front side of the latter instrument. In all vehicle display devices, only the display image of the display is displayed in the distance, and there is no comparison target for what the display image is displayed in the distance. When visually observed, the visual effect as a distant display was low.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a display device capable of imparting a sense of perspective to a display image and enhancing the distance display function.

[0006]

SUMMARY OF THE INVENTION The present invention provides a light-emitting display provided in a case, optical means for displaying a display image of the display at a distance, and a display provided in front of the optical path of the display. A shining part is provided to diffuse the display light from the display and shine outside the display area of the display.

Further, according to the present invention, there is provided a reflecting member for reflecting a display image of a display device to display a distance, and a light guide body for guiding the light of the light source is provided on the rear side of the reflecting member. The body is provided with a bright part.

Further, according to the present invention, the light source is provided so that it can be selectively turned on independently of the display.

[0009]

According to the present invention, with the above-described structure, the display image of the display which is displayed far away by the optical means or the reflecting member with respect to the image of the bright portion provided in front of the optical path of the display has the depth of the image of the bright portion. It is visually recognized in the direction, and a perspective image is added to the display image on the display.

Further, according to the present invention, by selectively turning on the light source for illuminating the light guide member independently of the display, the image of the bright portion is displayed at the time of abnormality and an alarm display function is added. be able to.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show a first embodiment of the present invention, in which a case 2 is provided with a display 2 composed of a fluorescent display tube (VFD) for digitally displaying a vehicle speed. Is fixed to a supporting circuit board 3 for switching and displaying a display value by an electric signal from a drive circuit described later, and displays a display image such as a number. In addition, a first reflection plate 4 which is located above the display unit 2 and which reflects the display image of the display unit 2 is disposed inside the case 1 so as to face the display unit 2 and the first reflection plate 4 is provided. A second reflecting plate 5 that reflects the reflected image from the plate 4 toward the driver A is disposed with its upper end side in a rearward tilted state, and thus the display image of the display 2 is displayed as the first and second images. The virtual image reflected by the reflection plates 4 and 5 of the second reflection plate 5 and reflected and projected on the second reflection plate 5 is transmitted through a condensing lens 7 which is an optical means provided in the display window 6 on the front surface of the case 1, and the driver A To be visible. In this case, as the condenser lens 7, an aspherical resin lens with extremely small aberration is used. Also,
Inside the case 1, a flat plate-shaped frame body 9 having an opening window 8 is disposed between the condenser lens 7 and the first reflection plate 4 which are in front of the optical path of the display 2. The frame 9 is made of a translucent material such as acrylic resin and is fitted into the groove 1A provided on the inner peripheral surface of the case 1 so as to close the display window 6 of the case 1. The peripheral edge of the opening window 8 of the frame body 9 is subjected to roughening treatment such as graining,
A shining portion 11 that shines outside the display area of the display device 2 is formed by diffusing a part of the light rays spreading outward of the display light 10 from the display device 2 on the periphery of the display area 2. On the bottom side of the case 1, a circuit board 12 that is connected to the display 2 by a wiring member (not shown) and mounts a large number of electronic components 12A constituting a drive circuit of the display 2 is fixed, On the front side of the case 1, a curved smoke plate 13 which is colored black, for example, and covers the front of the condensing lens 7 and has a low transmittance is placed in front of the driver A's line-of-sight direction. It is arranged in a tilted state.

According to the present invention having the above-described structure, the display light 2 in the form of a numeral, which is a display image 2A, is emitted from the display 2 when the display 2 (not shown) is turned on.
The display light 10 reflected by the first reflection plate 4 is further reflected by the second reflection plate 5, and the display light 10 reflected by the second reflection plate 5 is condensed by the condensing lens. 7 and the smoke board 13 to direct the driver A side. In this case, the display light 10 of the display device 2 is transmitted to the first and second reflection plates 4 and 5.
The virtual image reflected and projected on the second reflection plate 5 by reflecting the light on the surface is apparently the optical axis distance L between the display 2 and the first reflection plate 4 and the first reflection plate 4. And the optical axis distance L ′ between the second reflection plate 5 and the second reflection plate 5 are displayed in the depth direction, and the virtual image displayed in the depth direction of the second reflection plate 5 is collected. An image is further formed in the depth direction of the second reflecting plate 5 by the optical lens 7, and thus the virtual image displayed at a distance is visually recognized through the smoke plate 13. On the other hand, the display image 2A of the display light 10 reflected by the second reflector 5
The part that does not disturb the light is diffused by the roughening treatment applied to the peripheral edge of the opening window 8 of the frame body 9, and the opening window 8 shines to produce a bright portion 11.
Emits light in the shape of a frame, and this is imaged in the depth direction of the frame 8 by the condenser lens 7, and the irradiation light from the bright portion 11 is smoked.
Make 13 visible. In this way, the display light 10 of the display device 2 displayed in the distance by the first and second reflectors 4 and 5 and the condenser lens 7 and the irradiation of the bright portion 11 displayed in the distance only by the condenser lens 7. By transmitting the light and the smoke plate 13, the driver A can display the display image 2A and the irradiation light of the bright portion 11 that shines outside the display area of the display image 2A in a frame-shaped image around the display image 2A. Visually check 11A. in this case,
The display image 2A of the display device 2 is reflected by the first and second reflection plates 4 and 5 a plurality of times, and is further displayed by the condenser lens 7 in the depth direction of the second reflection plate 5, while it is bright. Since the image 11A of the portion 11 is displayed in the depth direction only by the condenser lens 7, the display image 2A of the display 2 and the image 11A of the bright portion 11 which are displayed through the smoke plate 13 are visually visible. There is a difference in perspective. That is, the display image 2A of the display 2 is visually recognized as being displayed further in the depth direction with respect to the image 11A of the bright portion 11, and thus the display image 2A of the display 2 is displayed.
When the image is displayed in the distance, the image can be visually recognized in comparison with the image 11A of the bright portion 11, so that the display image 2A of the display device 2 can be given a further perspective.

Therefore, in the present embodiment, the display light 10 of the display 2 is reflected by the first and second reflection plates 4 and 5 a plurality of times, and is further reflected and projected on the second reflection plate 5. The display image 2A visually recognized through the smoke plate 9 is displayed by the condensing lens 7 in the depth direction of the second reflecting plate 5 as if it was displayed on the engine part of the vehicle. The focus is good when checking the vehicle speed while gazing at a distance while the vehicle is running, and it is possible to quickly and easily check the vehicle speed that must be frequently checked when driving the vehicle. At the same time, a difference in perspective can be visually generated between the display image 2A of the display 2 and the image 11A of the bright portion 11 to enhance the distance display function.

Further, in this embodiment, the smoke plate 13 provided on the front side of the case 1 forms a dark surface on which no display is made when the display 2 is not lit, but the smoke is reflected by the second reflector 5. Other than that, for example, by displaying the display image 2A and the frame-shaped image 11A surrounding the display image 2A by transmitting the display light 10 of the display 2 and the irradiation light of the bright portion 11 and displaying the display image 2A. The fixing means such as the frame 2 and the circuit board 3 can be blinded, and the condenser lens 7
The black face meter is capable of easily focusing the display image 2A. Further, the external light incident on the case 1 is absorbed by the smoke plate 13, and by suppressing the amount of light reflected by the condenser lens 7 to be small, the adverse effect of the external light can be prevented and the visibility can be improved.

FIG. 4 shows a second embodiment of the present invention. The same parts as those of the first embodiment will be designated by the same reference numerals and detailed description thereof will be omitted. In this example, the first shown in the first embodiment
Also, the second reflectors 4 and 5 are omitted, the display 2 is disposed behind the condenser lens 7, and the light guide 8 is provided between the display 2 and the condenser lens 7. Arrange. Then, the display image 2A of the display 2 is formed by the condenser lens 7 in the depth direction of the display 2, and only the display light 10 of the display 2 is transmitted by the smoke plate 13 as in the first embodiment. , Indicator 2
Part of the display light 11 from the display unit 2 is diffused through the opening window 9 of the light guide 8 to cause the bright portion 11 to emit light in a frame shape, and the display light 11 from the display 2 and the irradiation light of the bright portion 11 are Similar to the embodiment, the display image 2A and a frame-shaped image 11A (which looks far away as in the virtual display diagram of FIG. 2) located around the display image 2A are displayed through the smoke plate 13. Also in this example, the display image 2A displayed on the smoke plate 13 and the frame-shaped image 11A are
A difference in perspective is visually generated by the optical axis distance L ″ from the display unit 2 to the light guide body 8, and thus the display image 2A is displayed as the image 11A.
By comparing with A, the distance display function can be enhanced.

FIG. 5 shows a third embodiment of the present invention. The same parts as those of the above-mentioned respective embodiments are designated by the same reference numerals and detailed description thereof will be omitted. In this example, the second shown in the first embodiment is used.
The reflecting plate 5 is omitted, and a concave mirror 15 serving as an optical means is provided at the mounting position of the second reflecting plate 5. Further, in this example, a bright portion 11 for diffusing the display light 10 of the display device 2 is formed on the periphery of the opening 1B provided in the case 1 located above the display device 2. Then, the display light 10 from the display 2 is reflected by the first reflecting plate 4, the reflected light is reflected by the concave mirror 15, and the virtual image reflected by the first reflecting plate 4 by the concave mirror 15 is concave mirror 15. The image is formed in the depth direction of and the smoke plate 13 transmits only the display light 10, and
A part of the display light 10 is diffused at the peripheral edge of the opening 1B of the case 1 to emit a frame-like light from the bright portion 11, the irradiation light from the bright portion 11 is transmitted through the smoke plate 13, and is transmitted through the smoke plate 13. When the driver A visually recognizes the display image 2A and the display of the display image 2A and the frame-shaped image 11A, it is possible to obtain the same operation and effect as in each of the above-described embodiments.

FIG. 6 and FIG. 7 show a fourth embodiment of the present invention. The same parts as those of the above-mentioned respective embodiments are designated by the same reference numerals and their detailed description will be omitted. In this example, a case where a head-up display is used is shown. In the storage section 21 provided in the instrument panel 20, the display unit 2 and the display light from the display unit 2 located in front of the optical path of the display unit 2 are shown. 10 is mirror-finished to reflect approximately 45 ° toward a combiner 24 formed by an appropriate means such as vapor deposition or coating on the inside or surface of the windshield 23 through a window 22 provided on the upper surface of the instrument panel 20. And a reflecting member 25. On the rear surface of the reflecting member 25, a light guide 26 made of a transparent material such as acrylic resin is laminated. Note that the reflecting member 25 and the light guide 26 do not necessarily have to be separate components, and for example, the reflecting member may be formed on the surface of the light guide by an appropriate means such as vapor deposition to form a single component.

In this case, the light guide 26 is formed to have a diameter larger than that of the reflection member 25, and the outer peripheral edge of the light guide 26 extending outward from the outer edge of the reflection member 25 has a rear surface of the light guide 26. Light source provided at 27
A shining portion 29 is formed of a reflecting surface 28 that reflects the illumination light of the. In addition, the window portion of the instrument panel 20
A condenser lens 7 for projecting the reflected image reflected by the reflection member 25 onto the combiner 24 and a heat ray reflective glass 30 covering the condenser lens 7 are fitted in the window 22. The heat rays of the sunlight penetrating into the storage section 21 through 23 are reflected to prevent the temperature inside the storage section 21 from rising.

The light source 27 is suppressed so that it is turned on in association with the operation of the display 2.

In the present embodiment constructed as described above, the display light 10 of the display 2 is reflected by the reflecting member 25, and the reflected image is projected by the condenser lens 7 onto the combiner 24 and the windshield 23. An illumination light of the light source 27 is incident on the inside of the light guide body 26 by the light source 27 that is imaged as the display image 2A on the outside front side and is turned on in association with the operation of the display device 2.
The incident light is reflected by the reflecting surface 28 formed on the peripheral edge of the light guide 26, whereby the bright portion 29 emits light so as to surround the periphery of the reflecting member 25. Then, the irradiation light from the bright portion 29 is projected onto the combiner 24 by the condensing lens 7, and this is imaged as a frame-shaped image 30 around the display image 2A which is imaged in front of and outside the windshield 23. .. In this case, the display image 2A formed on the outer front side of the windshield 23 and the frame-shaped image 30 surrounding the display image 2A are provided from the display 2 to the light guide 25.
The difference in perspective is visually caused by the optical axis distance L ″, and therefore, the distance display function can be enhanced by comparing the display image 2A with the image 30 as in the above embodiments.

FIGS. 8 and 9 show a fifth embodiment of the present invention, in which the same parts as those in the fourth embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In this example, for example, a signal from the vehicle speed sensor 32 is output to the control circuit 33, and the control circuit 33 causes the light source 27 shown in the fifth embodiment to display.
And is configured to be controlled independently. Then, by controlling the light source 27 by the control circuit 33, for example, when the vehicle travels a vehicle, it is turned off within the legal speed range, and is controlled to be turned on when the legal speed is exceeded, usually within the legal speed range. When traveling, the display light 10 of the display device 2 reflects the display light 10.
The reflected image is reflected by 25, and only the reflected image is projected on the combiner 24 by the condenser lens 7 to form the display image 2A as the vehicle speed on the outer front side of the windshield 23 (see FIG. 9A). On the other hand, when the speed exceeds the legal speed, the light source 27 is turned on by the control circuit 32, thereby causing the bright portion 29 to emit light, which is framed around the display image 2A formed outside and on the front side of the windshield 23. The image is formed as a circular image 30 (see FIG. 9B).

Therefore, in the present embodiment, by making the shining portion 29 shine, the display image 2A is given a perspective by comparing the display image 2A with the frame-shaped image 30 as in the above-mentioned embodiments. In addition, by controlling the light source 27 independently of the display device 2 by the control circuit 23, a function as an alarm display at the time of abnormality can be added.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. Not only the VFD but also various types may be used, and for example, a display formed by combining a liquid crystal display element and a backlight (EL, cold cathode tube [CCT] or the like) may be used as long as light emission display is possible. Further, the number of reflectors, their mounting positions, etc. may be appropriately set. Further, in the third embodiment in which the concave mirror is used to display the display image at a long distance, the reflection image from the concave mirror is used in the first embodiment. You may make it display at a distant place by the condensing lens shown. In addition, as shown in FIG. 10, the fourth and third parts are formed around the reflecting member 4 of the first and third embodiments.
The image 11B may be formed by emitting light from the light source 27 as in the fifth embodiment, and the image 11B is not limited to the frame shape, and may be a dot-like blinking image 11B as shown in FIG. Further, a separation line shape, a desired figure, or the like may be appropriately selected.

In each of the first to third embodiments, the curved smoke plate 13 is used, but a flat smoke plate may be used. As shown in FIG. 12, this is because the curved smoke plate 13 has a different smoke plate depending on the position at which the display light 10 is incident on the smoke plate 13 due to its curvature or the like.
Since there is a concern that there will be a difference in the refraction angle of the light emitted from 13 and this will be visually recognized as distortion of the image, it is difficult to set the curvature by design in order to completely remove the distortion. However, as shown in FIG. 13, a flat smoke plate
By using 13A, since the refraction angle of the display light 10 and the irradiation light 14 incident on the smoke plate 13A is constant, the display image 2A and the frame-shaped image 11A displayed on the smoke plate 13A are not distorted and are visually recognized. It is possible to maintain good sex. This appears more prominently as the virtual display surface of the distant display is made farther, and the distortion may not be noticeable depending on the distant distance, and may be adopted according to the set position of the virtual display surface.

Further, it is also possible to provide a plurality of light guides and reflecting members shown in the fifth and sixth embodiments to form a frame-shaped image in a multiple manner around the display image.

[0026]

According to the present invention, a light emitting type display provided in a case, and an optical means for displaying a display image of the display at a distance are provided.
A reflection part is provided in front of the optical path of the display device, which diffuses the display light from the display device and shines outside the display area of the display device. A member is provided, and a light guide that guides the light from the light source is provided on the rear side of the reflection member, and a bright portion is provided on the light guide to give a sense of perspective to the displayed image, thereby providing a distance display function. It is possible to provide a display device that can improve the display efficiency.

Further, according to the present invention, since the light source is provided so as to be able to be selectively turned on independently of the display device, it is possible to give a sense of perspective to a display image and add an alarm display function. A display device can be provided.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a first embodiment of the present invention.

FIG. 3 is a front view showing a first embodiment of the present invention.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a schematic explanatory view showing a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a display state in a fourth embodiment of the present invention.

FIG. 8 is a schematic explanatory view showing a fifth embodiment of the present invention.

FIG. 9A is an explanatory diagram showing a normal display state in the fifth embodiment of the present invention. (B) is an explanatory view showing a warning display state in the fifth embodiment of the present invention.

FIG. 10 is a sectional view showing a sixth embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a warning display state according to the sixth embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a refraction state of light in the first to third embodiments of the present invention.

FIG. 13 is an explanatory diagram showing a refraction state of light in the seventh embodiment of the present invention.

[Explanation of symbols]

 1 Case 2 Display 2A Display image 7 Condensing lens (optical means) 11, 29 Bright part 15 Concave mirror (optical means) 25 Reflecting member 26 Light guide

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Nakashizu 190-1 Fukuda-cho, Nagaoka-shi, Niigata Nihon Seiki Co., Ltd. R & D Center

Claims (3)

[Claims] 1. A light-emitting display provided in a case, an optical means for displaying a display image of the display at a distance, and a display provided in front of an optical path of the display to diffuse display light from the display. The display device is provided with a bright portion that shines outside the display area of the display device. 2. A reflecting member for reflecting a display image of a display device to display in a distance is provided, and a light guide body for guiding the light of a light source is provided on the rear side of the reflecting member, and the bright portion is provided on the light guide body. A display device characterized by being provided. 3. The display device according to claim 2, wherein the light source is provided so that it can be selectively turned on independently of the display device.