KR101268505B1 - Apparatus for displaying information in windshield of automotive vehicles - Google Patents

Abstract

The present invention relates to an information display device for a window glass of a vehicle, which can be miniaturized and slimmed, can easily adjust the size of a driving information image projected on the window glass, and improve the clarity and identification of the driving information image. The purpose.
In order to achieve the above object, the present invention provides a vehicle including a liquid crystal panel, a backlight unit for illuminating the rear side of the liquid crystal panel, and an optical system that enlarges or reduces the driving information image displayed on the liquid crystal panel and adjusts the focus to project the window glass. An information display device for a window glass, the optical system comprising: a plurality of reflectors arranged in sequence so as to sequentially reflect a driving information image displayed on a liquid crystal panel along a specific path; At least one projection lens for enlarging or reducing the travel information image reflected from the reflector and adjusting the focus to project the image onto the window glass; Image size adjusting means for adjusting the size of the driving information image projected on the window glass.

Description

{APPARATUS FOR DISPLAYING INFORMATION IN WINDSHIELD OF AUTOMOTIVE VEHICLES}

The present invention relates to an information display device for a window pane of a vehicle, and more particularly, can be miniaturized and slimmed, and can easily adjust the size of the driving information image projected on the window glass, and improve the clarity and identification of the driving information image. The present invention relates to an information display device for a window glass of a vehicle.

In recent vehicles, "information display apparatus for window glass" called a head up display (HUD) apparatus is provided.

The window display information display device is a technology for displaying vehicle driving information, for example, vehicle speed, RPM, fuel remaining amount, coolant temperature, and the like, on the front window glass of a vehicle.

As an example of the window display information display apparatus, there is a "optical system of a vehicle head apparatus" of Korean Patent No. 2009-41484 filed by the present applicant.

This technology includes a liquid crystal panel displaying a "driving information image" and an optical system which enlarges or reduces the "driving information image" displayed on the liquid crystal panel and adjusts the focus to project the window glass of the vehicle.

In particular, the optical system includes at least one or more preprocessing reflectors that reflect the "travel information image" displayed on the liquid crystal panel in a specific path, and at least one or more that enlarges or reduces and adjusts the focus of the "travel information image" reflected from the preprocessing reflector. Lenses and post-processing reflectors that reflect the "driving information image" passing through the lens to the windshield of the vehicle.

In general, an odd number of reflectors of the optical system are installed. This is because, when an even number of reflectors are provided, the "driving information image" of the vehicle reflected on the front windshield of the vehicle may be displayed in reverse, that is, in a mirror image.

However, such a conventional window glass information display device has a structure in which the "driving information image" of the liquid crystal panel is always enlarged or reduced at a constant magnification and reflected on the front windshield of the vehicle, so that the "winding information" of a constant size is always on the window glass of the vehicle. There is a disadvantage in that only the image "can be displayed, and there is a problem in that the size of the" driving information image "cannot be adjusted according to the driver's taste.

In some cases, there is also a method of adjusting the size of the "driving information image" displayed on the window glass by replacing lenses of different magnification. However, in this case, there is a disadvantage in that the information display device must be completely disassembled in order to replace the lens of different magnification, and there is a problem in that the size adjustment of the "driving information image" is very difficult and cumbersome.

In addition, the conventional window glass information display device has a disadvantage in that an odd number of reflectors are required to display a "driving information image" of the liquid crystal panel in a normal state on the window glass. This disadvantage causes an increase in the number of reflectors. have.

In particular, since the number of reflectors is increased, there is a problem that the size of the device is inevitably increased, and it is pointed out that the drawback is that there are many restrictions in the installation structure due to this problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to display information for a window glass of a vehicle which can easily adjust the size of the driving information image displayed on the window glass without changing a lens. To provide a device.

Another object of the present invention is to provide an information display apparatus for a window glass of a vehicle which can display a running information image of a liquid crystal panel on a window glass in a normal state even with an even number of reflectors.

It is still another object of the present invention to configure the apparatus so that the driving information image of the liquid crystal panel can be normally displayed on the window glass even using an even number of reflectors, so that the number of parts can be reduced and the number of parts can be reduced. An object of the present invention is to provide an information display device for a window glass of a vehicle that can be miniaturized and slimmed.

In order to achieve the above object, an information display device for a window glass of a vehicle according to the present invention includes a liquid crystal panel, a backlight unit for illuminating a rear surface of the liquid crystal panel, and a driving information image displayed on the liquid crystal panel. In an information display apparatus for a window glass of a vehicle including an optical system for adjusting and projecting onto a window glass, the optical system includes a plurality of reflectors arranged sequentially so that the driving information image displayed on the liquid crystal panel may be sequentially reflected along a specific path. With; At least one projection lens that enlarges or reduces the travel information image reflected from the reflector and adjusts a focus to project the image onto the window glass; It characterized in that it comprises an image size adjusting means for adjusting the size of the driving information image projected on the window pane.

Preferably, the image size adjusting means, the first distance adjusting unit for adjusting the distance of the first reflecting mirror with respect to the liquid crystal panel, and the second distance adjusting for adjusting the distance of the second reflecting mirror with respect to the first reflecting mirror. And a first unit and a second distance adjusting unit, adjusting the effective distance of the lens with respect to the liquid crystal panel to adjust the size of the driving information image projected on the window glass.

The projection lens may have a structure such that the driving information image emitted from the exit surface may be formed as a virtual image at a distance in the range of 1 to 1.3 m outside the window glass.

The optical system has a structure such that the virtual image of the driving information image formed outside the window glass can be formed within a 6 ° to 15 ° angle range in a downward direction from a horizontal line of driver's field of view.

The mirrors are arranged in an even number, and the screen orientation of the liquid crystal panel is adjusted to correct the mirror imaging phenomenon of the driving information image generated when reflected by the even number of reflectors. It characterized in that it comprises a control unit for controlling.

According to the window display information display device of the present invention, the effective distance between the liquid crystal panel and the lens is adjusted by moving the reflectors, and the size of the driving information image projected on the window glass is adjusted by adjusting the effective distance between the liquid crystal panel and the lens. Since the structure to adjust, it is very easy and simple to adjust the size of the driving information image. Therefore, the effect is very easy to use.

In addition, since the screen direction of the liquid crystal panel is controlled, it is possible to correct the driving information image projected on the window glass in an established state irrespective of the number of holes and even numbers of the reflector. Therefore, the number of reflectors can be made even.

In addition, since the number of reflectors can be made even, the number of reflectors does not necessarily have to be arranged in an odd number in order to make the traveling information image projected on the window glass upright. Therefore, there is an effect that the use of an unnecessary reflector can be prevented.

In addition, since the use of an unnecessary reflector can be prevented, the number of parts can be reduced, and the number of parts can be reduced, thereby minimizing and slimming down the device.

In addition, since the structure of the optical system can be adjusted to an optimal state of the imaging position, the distance, etc. of the driving information image projected on the window glass, the sharpness and identification of the driving information image projected on the window glass can be significantly improved. It works.

1 is a perspective view showing an information display device for a window glass of a vehicle according to the present invention;
2 is a side view of FIG. 1 showing an information display apparatus for a window glass of a vehicle according to the present invention;
3 is a view showing a state in which the information display device for the window glass of the vehicle according to the present invention is installed in the vehicle.

Best Mode for Carrying Out the Invention Preferred embodiments of an information display apparatus for a window glass of a vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 1 to 3, the window display information display apparatus of the present invention is provided inside the instrument panel A (see FIG. 3) in front of the driver's seat, and includes a liquid crystal panel 10 and a liquid crystal panel 10. Back light unit 12 is provided on the rear side.

The liquid crystal panel 10 displays a "travel information image" input from the vehicle. The backlight unit 12 illuminates the rear surface of the liquid crystal panel 10.

The window glass information display device of the present invention includes an optical system 20 provided on the front side of the liquid crystal panel 10.

The optical system 20 includes an even number of reflectors 22 and 24 for sequentially reflecting a "travel information image" of the liquid crystal panel 10 along a specific path.

The reflectors 22 and 24 are formed of an even number, and are provided to correspond to the front side of the first reflecting mirror 22 and the first reflecting mirror 22 installed corresponding to the front side of the liquid crystal panel 10. The reflector 24 is provided.

The first reflecting mirror 22 is arranged at a specific angle with respect to the liquid crystal panel 10. For example, the liquid crystal panel 10 is arranged at an angle of about 25 ° to 35 °. The first reflector 22 arranged as described above reflects the "travel information image" displayed on the liquid crystal panel 10 in a specific direction.

The first reflecting mirror 22 may have a completely flat reflecting surface, and may have a concave curvature or a convex curvature in some cases. Reflective surfaces of various forms are appropriately selected and used to correct image distortion caused by the projection angle, projection distance, etc. with respect to the window glass B (see FIG. 3). Preferably, it is a perfect plane.

The second reflecting mirror 24 is arranged at a specific angle with respect to the first reflecting mirror 22. For example, it is arranged at an angle of about 40 ° to 50 ° with respect to the first reflecting mirror 22, and the second reflecting mirror 24 arranged in this way is configured to face the window glass B (see FIG. 3) of the vehicle. .

The second reflector 24 reflects the "travel information image" reflected by the first reflector 22 in the direction of the window glass B. The second reflecting mirror 24 may have a completely flat reflecting surface, and may have a concave curvature or a convex curvature in some cases. Reflective surfaces of various forms are appropriately selected and used to correct image distortion caused by the projection angle, projection distance, etc. with respect to the window glass B. Preferably, it is a perfect plane.

Again, referring to FIGS. 1 to 3, the optical system 20 of the present invention may include at least one projection lens 30 for projecting a “travel information image” reflected from the second reflector 24 onto the window glass B. 32).

The projection lenses 30 and 32 are constituted by a combination of concave and convex lenses, and are sequentially arranged along the same optical axis from the second reflecting mirror 24.

These projection lenses 30 and 32 enlarge or reduce the "driving information image" reflected from the second reflector 24 to an appropriate size, adjust the focus, and then project it onto the window pane B of the vehicle. Thus, the "travel information image" projected onto the window pane B can have an optimal size and focus.

On the other hand, of the projection lenses 30, 32, the exit surface 32a of the final projection lens 32 is preferably composed of a concave surface. This is to allow the "travel information image" emitted from the exit surface 32a to be projected onto the window glass B while being enlarged.

As shown in FIG. 3, the projection lenses 30 and 32 may form an image of a "travel information image" emitted from the exit surface 32a as a virtual image C at a long distance outside the window glass B. FIG. It is configured to be.

Preferably, the projection lenses 30 and 32 have a "travel information image" emitted from the exit surface 32a with a distance L1 of about 1 to 1.3 m outside the window glass B, and the virtual image C. It is good to be configured to form an image.

The reason for this configuration is to separate the distance L2 between the "driving information image" projected on the window glass B and the driver's field of view D as much as possible, which is the "driving information image" and the driver's field of view (D). This is because the clarity of the "driving information image" is remarkably increased only when the distance L2 is spaced apart.

In particular, the distance L2 between the "driving information image" and the driver's field of view D must be separated from each other, and the "driving information image" emitted from the projection lenses 30 and 32 is generated during the projection onto the window glass B. This is because the double phase phenomenon is minimized. This is because the clarity of the "travel information image" can be significantly increased only when the double image phenomenon of the "travel information image" is reduced.

On the other hand, the distance adjustment of the window glass (B) and the virtual image (C), the focal length of the projection lens (30, 32) and the distance between the projection lens (30, 32) and the first and second reflecting mirrors (22, 24) You can adjust it.

The focal length of the projection lenses 30 and 32 may be adjusted by adjusting the thickness t, the refractive index Nd, the Abbe's number Vd, and the radiuses of curvature of the entrance and exit surfaces of the projection lenses 30 and 32.

The distance adjustment between the projection lenses 30 and 32 and the first and second reflecting mirrors 22 and 24 is controlled through the first distance adjusting unit 50 and the second distance adjusting unit 60 which will be described later.

Adjustment of the focal length through the thickness and refractive index of the projection lenses 30 and 32 and the radius of curvature of the Abbe's number and the entrance and exit surfaces is a well-known technique, and thus a detailed description thereof will be omitted. And the first distance control unit 50 and the second distance control unit 60 will be described later.

The projection lenses 30 and 32 form an image of the "travel information image" as a virtual image C at a specific distance L1 outside the window glass B, but the driver's field of view extension line having the horizontal image C formed in a horizontal state ( It is configured to be formed in the downward direction of E). In particular, it is possible to form an image within the 6 ° to 15 ° angle α in the downward direction from the driver's field of view extension line E.

The reason for this configuration is that when the virtual image C of the "travel information image" is formed in the range of about 6 ° to 15 ° angle α in the downward direction from the driver's field of view extension E, This is because the sharpness was found to be the highest.

Referring again to FIGS. 1 and 2, the window display information display device of the present invention includes image size adjusting means for adjusting the size of the "travel information image" projected onto the window glass B. FIG.

The image size adjusting means includes a first distance adjusting unit 50 for adjusting the distance l1 of the first reflecting mirror 22 with respect to the liquid crystal panel 10, and a second reflecting mirror 24 with respect to the first reflecting mirror 22. And a second distance adjusting unit 60 for adjusting the distance l2.

The first distance adjusting unit 50 is installed at the tip of the screw feed shaft 52 so as to rotate the pair of screw feed shafts 52 and the screw feed shaft 52 rotatably installed in a casing (not shown). The rotary knob 54 and a pair of moving nuts 56 fixed to both sides of the first reflecting mirror 22 so as to be screwed along the screw feed shafts 52 are provided.

The screw feed shafts 52 are arranged side by side at intervals toward the liquid crystal panel 10. The pair of screw feed shafts 52 installed in this way rotates as the user rotates the rotary knob 54 of the tip portion.

The moving nuts 56 screw along the screw feed shaft 52 as the screw feed shafts 52 rotate. Thus, the first reflecting mirror 22 fixed integrally moves with respect to the liquid crystal panel 10. Thus, the distance l1 of the first reflecting mirror 22 with respect to the liquid crystal panel 10 is adjusted.

As a result, the effective distance L1 + L2 + L3 between the liquid crystal panel 10 and the projection lens 30 is adjusted. Accordingly, the size of the "travel information image" projected onto the window glass B can be adjusted easily and simply.

Here, a casing (not shown) is provided with other guide means, for example, a guide rail, for guiding the movement of the first reflecting mirror 22 with respect to the liquid crystal panel 10. Since the guide rail is a general configuration, a detailed description thereof will be omitted.

The second distance adjusting unit 60 is provided at the tip of the screw feed shaft 62 so as to rotate the screw feed shaft 62 and the pair of screw feed shafts 62 rotatably installed in a casing (not shown). The rotating knob 64 and a pair of moving nuts 66 fixed to both sides of the second reflecting mirror 24 to be screwed along the screw feed shafts 62 are provided.

The screw feed shafts 62 are arranged side by side at intervals toward the first reflecting mirror 22. The pair of screw feed shafts 62 installed as described above rotates as the user rotates the rotary knob 64 of the tip portion.

The moving nuts 66 are screwed along the screw feed shaft 62 as the screw feed shafts 62 rotate. Thus, the second reflecting mirror 24 fixed integrally is moved relative to the first reflecting mirror 22. Thereby, the distance l2 of the second reflecting mirror 24 with respect to the first reflecting mirror 22 is adjusted.

As a result, the effective distance L1 + L2 + L3 between the liquid crystal panel 10 and the projection lens 30 is adjusted. Accordingly, the size of the "travel information image" projected onto the window glass B can be adjusted.

Here, the casing which is not shown in figure is provided with the other guide means for guiding the movement of the 2nd reflector 24 with respect to the 1st reflector 22, for example, a guide rail. Since the guide rail is a general configuration, a detailed description thereof will be omitted.

On the other hand, when the effective distance (l1 + l2 + l3) between the liquid crystal panel 10 and the projection lens 30 is adjusted through the first and second distance adjusting units 50 and 60, an image formed outside the window glass B is formed. The position of the virtual image C of the "travel information image" can be adjusted. In particular, the distance L1 between the window glass B and the virtual image C can be adjusted.

Therefore, when the effective distance (l1 + l2 + l3) between the liquid crystal panel 10 and the projection lens 30 is appropriately adjusted by operating the first and second distance adjusting units 50 and 60, the window glass B and The distance L1 from the virtual image C can be adjusted to an optimal state. In this way, it is possible to provide the driver with an optimal "driving information image".

Referring back to Figures 1 to 3, the window information display device of the present invention, the wired, wireless interface device 70 for connecting to an external device, and the input through the wired, wireless interface device 70 The control part 80 which processes various data is provided.

The wired / wireless interface device 70 includes a USB terminal and a Bluetooth device, and is connected to an external device such as a navigation device or a smartphone by wire or wireless. Therefore, various image data are received from external devices.

The controller 80 is equipped with a microprocessor, processes various image data transmitted through the wired / wireless interface device 70, and controls the liquid crystal panel 10 according to the processed image data. In particular, it controls so that various image data received from an external device can be displayed on the liquid crystal panel 10. As a result, an image of an external device may be projected onto the window glass B of the vehicle.

Meanwhile, the controller 80 controls the liquid crystal panel 10, but controls the screen direction of the liquid crystal panel 10. In particular, it controls so that the " travel information screen " of the liquid crystal panel 10 can be a mirror image.

Therefore, the "travel information screen" of the mirror imaged liquid crystal panel 10 can be corrected to a normal image in the process of being reflected through the even number of reflectors 22 and 24. Thereby, even if the reflectors 22 and 24 are arranged in an even number, it is possible to maintain a state in which the "travel information image" projected onto the window glass B is established.

Next, an operation example of the present invention having such a configuration will be described with reference to FIGS. 1 to 3.

First, when the "travel information image" is displayed on the liquid crystal panel 10, the displayed "travel information image" is reflected at a specific angle through the first reflecting mirror 22.

The " travel information image " reflected by the first reflecting mirror 22 is incident on the projection lenses 30 and 32 while being reflected again by the second reflecting mirror 24 in the window glass direction.

At this time, the "driving information image" reflected through the first and second reflectors 22 and 24 several times along a specific path until it is incident on the projection lenses 30 and 32 from the liquid crystal panel 10. Bypass will be made.

As a result, the effective distance l1 + l2 + l3 from the liquid crystal panel 10 to the projection lenses 30 and 32 becomes long. As a result, the "travel information image" displayed on the window glass B can maintain a deep depth. Thus, the sharpness and discrimination of the "traveling information image" are remarkably improved.

On the other hand, the "driving information image" incident on the projection lenses 30 and 32 passes through the projection lenses 30 and 32 and is enlarged or reduced to an appropriate size and the focus is adjusted.

The "traveling information image" which is enlarged or reduced and whose focus is adjusted is emitted from the projection lenses 30 and 32 while maintaining a clear state, and the exited "traveling information image" is projected onto the window glass (B).

At this time, the "travel information image" projected onto the window glass B is formed into a virtual image C with a distance L1 of about 1 to 1.3 m outside the window glass B, and the "travel information image" The virtual image C is remarkably improved in clarity and discrimination.

This provides the driver with clearer driving information. In particular, basic information such as vehicle speed, RPM, fuel level, coolant temperature, navigation information of a navigation device, application information of a smartphone, and the like are more clearly and clearly provided.

On the other hand, when trying to adjust the size of the "travel information image" projected on the window glass (B), the first distance control unit 50 and the second distance control unit 60 of the image size adjusting means.

Then, the distance l1 of the first reflecting mirror 22 with respect to the liquid crystal panel 10 and the distance l2 with respect to the second reflecting mirror 24 with respect to the first reflecting mirror 22 are adjusted. As a result, the effective distance L1 + L2 + L3 between the liquid crystal panel 10 and the lens 30 is adjusted, and the size of the "travel information image" projected on the window glass B is adjusted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: liquid crystal panel 12: backlight unit (Back-Light Uunt)
20: optical system 22: first reflecting mirror
24: second reflecting mirror 30: projection lens (Lens)
32: projection lens 50: first distance control unit
52: screw feed shaft 54: rotary knob
56: moving nut 60: second distance control unit
62: screw feed shaft 64: rotary knob
66: Nut 45: wired / wireless interface device
80: control unit B: pane
C: Virtual image D: Driver's field of view
E: Driver's line of sight L1: Distance between the pane and the virtual image
L2: Distance between the virtual image and the driver's field of view l1: Distance between the liquid crystal panel and the first reflecting mirror
l2: distance between the first and second reflecting mirrors
ℓ3: distance between the second reflecting mirror and the projection lens
ℓ1 + ℓ2 + ℓ3: Effective distance between the liquid crystal panel and the lens

Claims (8)

A liquid crystal panel 10; A backlight unit 12 illuminating a rear surface of the liquid crystal panel 10; The even number of reflectors 22 and 24 sequentially arranged to sequentially reflect the driving information image displayed on the liquid crystal panel 10 along a specific path, and the travel reflected from the even number of reflectors 22 and 24. At least one projection lens (30, 32) for projecting onto the window glass (B) by enlarging or reducing the information image and adjusting the focus, and image size adjustment for adjusting the size of the driving information image projected on the window glass (B). In the information display apparatus for a window glass of a vehicle comprising;
The image size adjusting means,
The distance between the first distance adjusting unit 50 for adjusting the distance l1 of the first reflecting mirror 22 with respect to the liquid crystal panel 10 and the second reflecting mirror 24 with respect to the first reflecting mirror 22 ( and a second distance adjusting unit 60 for adjusting l2).
The first and second distance adjusting units 50 and 60 adjust the effective distances l1 + l2 + l3 of the projection lenses 30 and 32 with respect to the liquid crystal panel 10 to the window glass B. Adjust the size of the projected driving information image,
The projection lenses 30 and 32 are composed of a combination of convex and concave lenses, and the exit surface 32a of the final projection lens 32 is composed of a concave surface, so that the driving information image emitted from the exit surface 32a is obtained. As it is magnified, it is projected onto the window pane (B),
The optical system 20,
The driving information image emitted from the exit surface 32a of the projection lenses 30 and 32 may be formed as a virtual image C at a distance L1 outside the window B and in a range of 1 to 1.3 m. Has,
The virtual image (C) of the driving information image formed outside the window (B) has a structure that can be formed within the angle range of 6 ° to 15 ° in the downward direction from the horizontal line of the driver's field of view (E),
The screen orientation of the liquid crystal panel 10 is controlled to correct the mirror imaging phenomenon of the driving information image generated when reflected by the even number of reflectors 22 and 24 in a normalized state. A control unit 80,
A wired / wireless interface device 70 connected to the external device so as to receive image data of the external device;
And a control unit for controlling the liquid crystal panel 10 so that the image data transmitted through the wired / wireless interface device 70 can be displayed on the liquid crystal panel 10. Information display device. delete delete delete delete delete delete delete

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