CN111703303A - display device - Google Patents

Abstract

The present invention provides a display device (10). The display device (10) has: a mirror (44) that reflects light from the image display part (26); and a half mirror (48) that transmits the light from the image display part (26), on the other hand , the light reflected by the mirror (44) is reflected toward the viewer side. In addition, the image display unit (26) includes a first area (30) for generating a first image (34) and a second area (32) for generating a second image (36) on the same surface. The first image (34) is provided as a real image, while the second image (36) is provided as a virtual image. The second image ( 36 ) is reflected to the side of the half mirror ( 48 ) by the mirror ( 44 ), and is reflected to the side of the viewer by the half mirror ( 48 ). Thereby, the configuration of the display device can be simplified, and the second region can be effectively utilized as a portion for generating the second image viewed by the viewer.

Description

display device

technical field

The present invention relates to a display device having an image display unit.

Background technique

In a motor vehicle, an instrument panel in which measuring instruments such as a speedometer are assembled is mounted. In recent years, a technique of displaying various kinds of information as images superimposed on such a measuring instrument has been widely developed. For example, in Japanese Patent Application Laid-Open No. 5904137, particularly in FIGS. 1 and 5, a technique is described in which various Various pieces of information are displayed as virtual images superimposed on the instrument cluster. By displaying information as a virtual image only when a predetermined condition is satisfied, a viewer (especially a driver) can recognize the information intuitively.

SUMMARY OF THE INVENTION

In the technique described in Japanese Patent Application Laid-Open No. 5904137, as shown in FIG. 1, in order to display a virtual image on the front side of the instrument cluster, an image generating unit for generating an image is provided above the instrument cluster, and the image Provided as a virtual image. In this configuration, since a large space for installing the image generation unit is required, there arises a problem of increasing the size of the instrument panel. Moreover, the arrangement layout of the speedometer is restricted.

Therefore, it is considered that the image generated by the image generating unit is provided as a real image. However, when the display device is incorporated in the instrument panel, the instrument cover provided on the instrument panel covers a part of the image generation unit. Viewers cannot watch this section. That is, even if an image is generated on the entire image generating section, it is difficult for a viewer to recognize a part of the generated image (in other words, information).

The general purpose of the present invention is to provide a display device with a simple structure.

The main object of the present invention is to provide a display device that makes it easy for a viewer to view images generated by a part of the image generating units as virtual images.

According to an embodiment of the present invention, there is provided a display device including an image display unit that displays a predetermined image, characterized in that:

with reflectors and semi-transparent mirrors, of which,

the mirror reflects light from the image display part;

The half mirror is sandwiched between the image display part and the reflector, transmits the light from the image display part, and on the other hand, directs the light reflected by the reflector to the viewer side reflection,

The image display part includes a first area and a second area on the same surface, wherein the first area generates a first image provided as a real image; the second area generates a second image provided as a virtual image,

The second image generated by the second area is reflected to the side of the half mirror by the mirror, and is also reflected to the side of the viewer by the half mirror.

In the present invention, the first image is generated from the first area of the image display unit, and the second image is generated from the second area. That is, the image display unit also functions as an image generation unit. In addition, the second image generated in the second area of the image display unit is provided to the viewer as a virtual image displayed at a predetermined position in the first area through a mirror and a half mirror.

Therefore, there is no need to separately provide an image generating unit (light source) for displaying a virtual image. Accordingly, simplification of the structure of the display device can be achieved. Furthermore, the second region can be effectively utilized as a portion for generating a second image that can be viewed by the viewer.

The above-mentioned objects, features, and advantages can be easily understood from the description of the following embodiments with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic perspective view of a main part of a display device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a main part of the display device of FIG. 1 .

FIG. 3 is a schematic front view of a main part of the display device of FIG. 1 .

Detailed ways

Hereinafter, the display device according to the present invention will be described in detail with reference to the accompanying drawings while citing preferred embodiments.

1 and 2 are a schematic perspective view of a main part and a side cross-sectional view of a main part of the display device 10 according to the present embodiment, respectively. The display device 10 is a device to be mounted on a motor vehicle, which is assembled to the instrument panel 11 of the motor vehicle. On the instrument panel 11, a meter visor 12 is provided. As shown in FIG. 1 , the meter shutter 12 includes a lower wall portion 14 , a left wall portion 16 positioned on the left side when viewed by an occupant P (see FIG. 2 ) as a viewer, a right wall portion 18 positioned on the right side, and an upper wall The lower wall portion 14 and the upper wall portion 20 are connected to the left wall portion 16 and the right wall portion 18, respectively, to form a generally oblong viewing area 22.

The dash visor 12 blocks external light such as sunlight, so that the occupant P can easily see the inside of the viewing area 22 . That is, the meter shutter 12 functions as a light shielding mechanism.

The display device 10 has an image display unit 26 (so-called display) that also serves as an image generation unit. An image display surface is provided on the front surface of the image display portion 26 facing the occupant P. In addition, the control unit 28 is provided on the back surface of the front surface, in other words, on the back surface that cannot be viewed by the occupant P.

As shown in FIGS. 1 and 2 , most of the image display portion 26 is located between the lower wall portion 14 and the upper wall portion 20 of the meter shutter 12 , and the upper end thereof is positioned above the upper wall portion 20 . In other words, the upper wall portion 20 of the meter shutter 12 covers the upper end of the image display portion 26 . By this covering, the image display part 26 is divided into the first area 30 located between the lower wall part 14 and the upper wall part 20 and the second area 32 covered by the upper wall part 20 .

The occupant P can directly view the image generated in the first area 30 . That is, the first image 34 (see FIG. 3 ) generated in the first region 30 is provided as a real image. On the other hand, the second image 36 generated in the second area 32 is provided as a virtual image at the position shown in FIG. 3 within the first area 30 . This aspect will be described later. In addition, the display contents of the first image 34 and the second image 36 are different from each other.

As shown in FIG. 3 , the lower wall portion 14 , the left wall portion 16 , and the right wall portion 18 of the meter shutter 12 cover the lower end, the left end, and the right end of the image display portion 26 , respectively. Therefore, the occupant P can view the first image 34 (information) displayed in the viewing area 22 surrounded by the lower wall portion 14 , the left wall portion 16 , the right wall portion 18 , and the upper wall portion 20 of the dash panel 12 through the real image. ). In addition, FIG. 3 exemplifies a state in which the motor vehicle is traveling on a predetermined road and the traveling speed (travel speed) is 100 km/h in the first area 30 . In addition, the reference numeral 38 is a portion where a predetermined image is generated in the second area 32 .

Inside the meter shutter 12 , a sub shutter 40 (refer to FIG. 2 ) is provided as a light shielding mechanism that blocks external light together with the meter shutter 12 . An opening 42 is formed at a portion of the sub-shutter 40 facing the second region 32 . Inside the sub shutter 40 , a reflector 44 is provided so as to face the opening 42 . Further, a motor 46 (reflection angle changing mechanism) is attached to the mirror 44 . Between the reflector 44 and the motor 46, a tension frame is provided with a wire (not shown), and the motor 46 feeds out or winds the wire. As a result of this, the inclination angle of the mirror 44 changes.

Since the mirror 44 is spaced apart from the second region 32 by a predetermined interval, a gap is formed between the mirror 44 and the image display unit 26 . An upper portion of a half mirror 48 that is positioned and fixed in an inclined posture is inserted into this gap. In other words, the half mirror 48 is interposed between the mirror 44 and the image display unit 26 . The half mirror 48 transmits light from the rear surface side (side away from the occupant P) and reflects light from the front surface side (side close to the occupant P).

As shown in FIG. 1 , in the sub-shield 40 , a light passing hole 50 for passing light therethrough is formed. That is, the light reflected by the mirror 44 can pass through the light passing hole 50 to reach the half mirror 48 . In addition, in FIG. 1 , the drawing is simplified for easy understanding. For example, the motor 46 and the like are not shown.

In addition, a lens 52 located in front of the half mirror 48 is fitted in the sub shutter 40 . Therefore, the occupant P views the information from the display device 10 through the lens 52 .

In the above-described configuration, as shown in FIG. 2 , the front end of the lower wall portion 54 of the sub-shutter 40 is preferably set at a position at a height from the line of sight of the occupant P (typically, the driver) assumed to be When H is viewing, the position of the mirror 44 is shielded. The front end of the lower wall portion 14 of the meter shutter 12 is preferably set at a position that shields the lower wall portion 54 of the sub shutter 40 when viewed from the height position H.

The display device 10 according to the present embodiment is basically configured as described above, and the functions and effects thereof will be described next.

If the motor vehicle is activated by the driver (eg, the occupant P), the display device 10 is activated. After that, the image display unit 26 constituting the display device 10 generates a predetermined first image 34 on the first area 30 . In the example shown in FIG. 3 , the state in which the motor vehicle is traveling on a predetermined road and the traveling speed thereof are generated in the first area 30 as the first image 34 . Since the first image 34 is irradiated from the rear surface side of the half mirror 48 as shown in FIG. 2 , it passes through the half mirror 48 and is provided to the occupant P as a real image. During the running of the motor vehicle, the image display unit 26 continuously provides the real image under the control of the control unit 28 .

In this case, when the traveling speed of the motor vehicle exceeds a predetermined threshold value, the control unit 28 issues a command to “generate a predetermined warning image” to the portion 38 shown in FIG. 3 in the second area 32 . Having received this command, the image display unit 26 generates a red rectangle as the second image 36 on the portion 38 . In addition, in FIG. 3, the part 38 is shown by hatching, and it shows that it appears red.

The second image 36 generated on the site 38 is irradiated from the rear surface side of the half mirror 48 as shown in FIG. 2 , and therefore, is transmitted through the half mirror 48 as described above. Here, the mirror 44 is arranged on the front surface side of the half mirror 48 . Therefore, the second image 36 is reflected by the mirror 44 . The reflected second image 36 passes through the light passing hole 50 and is incident on the front surface of the first region 30 of the half mirror 48 . In this way, by forming the light passing holes 50 in the sub-shield 40 , the second image 36 can be easily incident on the half mirror 48 without being blocked by the sub-shield 40 .

In addition, since the reflector 44 is provided inside the sub-shield 40 , it is difficult for the occupant P to see the reflector 44 , in other words, it is difficult to perceive the presence of the reflector 44 . Therefore, in order to prevent the occupant P from viewing the mirror 44, it is not necessary to take measures for the arrangement layout of measuring instruments such as meters. That is, restrictions on the arrangement layout of the measuring instruments are avoided.

As described above, the half mirror 48 reflects the second image 36 , which is light incident from the front, toward the passenger P side. Therefore, the occupant P can view the second image 36 reflected from the first area 30 indirectly, in other words, through the virtual image. In the present embodiment, the second image 36 overlaps the travel speed display area in the first image 34 . That is, the red rectangle overlaps the traveling speed displayed in the first area 30 . As a result, the occupant P recognizes that "the travel speed falls within the red rectangle", and can thereby quickly perceive the state in which the travel speed exceeds a predetermined threshold and a warning is displayed.

In this way, according to the present embodiment, the image generation unit also functions as the image display unit 26 . In addition, the second image 36 generated in the second area 32 of the image display unit 26 is provided to the occupant P as a virtual image displayed at a predetermined position in the first area 30 through the mirror 44 and the half mirror 48 . Therefore, it is not necessary to provide an image generating unit (light source) for displaying a virtual image. Accordingly, simplification of the structure of the display device 10 can be achieved.

In addition, the second area 32 can be effectively utilized as a portion where the second image 36 viewed by the occupant P is generated. Therefore, various information can be provided to the occupant P without enlarging the display area of the image display unit 26 , in other words, without increasing the size of the display device 10 . In other words, miniaturization of the display device 10 that displays various information can be achieved.

In addition, by displaying the second image 36 so as to overlap with a predetermined position of the first image 34 when the predetermined condition is satisfied, the real image and the virtual image (first image 34) are displayed in combination when only the real image (first image 34) is displayed. and the second image 36), it is easy for the occupant P to recognize how the traveling speed of the motor vehicle changes, for example.

Furthermore, when the occupant P views the image display portion 26 from the height position H, the mirror 44 is shielded by the lower wall portion 54 of the sub-shutter 40 , and the lower wall portion 54 of the sub-shutter 40 is shielded by the lower wall portion of the instrument shutter 12 14 shade (see Figure 2). Therefore, the occupant P is prevented from recognizing the presence of the mirror 44 and the lower wall portion 54 of the sub shutter 40 . Therefore, the image display portion 26 is made excellent in appearance.

In addition, when it is desired to change the display position of the second image 36 in the first area 30 , it is only necessary to drive the motor 46 . As described above, the wire is fed out or wound in accordance with the driving, and accordingly, as shown in FIG. 2 , the inclination angle of the mirror 44 changes. As a result, the reflection angle of the second image 36 transmitted through the half mirror 48 is changed, and the display position of the second image 36 in the first area 30 is changed.

The present invention is not particularly limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, the second region 32 may be a region where various images can be generated. In this case, the control unit 28 may perform control such that the predetermined second image 36 is generated when a predetermined condition is satisfied, and another second image 36 is generated when another condition is satisfied.

In addition, it is not particularly necessary to display the second image 36 at a specific position in the first area 30, and the display of the second image 36 in the first area 30 may be changed when a predetermined condition is satisfied and another condition is satisfied. Location. For this purpose, the motor 46 may be driven under the control of the control unit 28 .

In addition, although the vehicle-mounted display device 10 is illustrated in this embodiment, the display device 10 according to the present invention is not particularly limited to the vehicle-mounted type, and may be a so-called stationary type (fixed type).

Claims (6)

1. A display device (10) having an image display unit (26) for displaying a predetermined image,

having a mirror (44) and a half mirror (48), wherein,

the mirror (44) reflects light from the image display section;

the half mirror (48) is interposed between the image display unit and the mirror, transmits light from the image display unit, and reflects light reflected by the mirror toward a viewer,

the image display unit includes a 1 st region (30) and a 2 nd region (32) on the same surface, wherein the 1 st region (30) generates a 1 st image (34) provided as a real image; the 2 nd region (32) generates a 2 nd image (36) provided as a virtual image,

the 2 nd image generated by the 2 nd area is reflected to the half mirror side by the mirror, and is reflected to the viewer side by the half mirror.

2. The display device according to claim 1,

the 2 nd image reflected to the viewer side by the half mirror is displayed as a virtual image in the 1 st region.

3. The display device according to claim 1,

the display device is provided with a light shielding mechanism (12), and the image display section is divided into the 1 st area and the 2 nd area by the light shielding mechanism, wherein the light shielding mechanism (12) shields the vicinity of the image display section from light incidence.

4. The display device according to claim 3,

the mirror is disposed inside the light shielding mechanism, and a light passage hole (50) is formed in the light shielding mechanism, and the light passage hole (50) becomes an optical path from the mirror toward the half mirror.

5. The display device according to claim 1,

a reflection angle changing mechanism (46) is provided on the mirror, and the reflection angle changing mechanism (46) changes the reflection angle of the 2 nd image realized by the mirror.

6. The display device according to any one of claims 1 to 5,

the display device is mounted on an automotive vehicle, generates a traveling speed of the vehicle as the 1 st image, and generates a warning display overlapping the traveling speed as the 2 nd image when the traveling speed exceeds a predetermined threshold value set in advance.

Images