KR20110101929A - Back light unit of hud system for automotive vehicles - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit of a vehicle head apparatus, which can improve the clarity of the driving information image displayed on the windshield, and provides various information necessary for driving.
In order to achieve the above object, the present invention provides a liquid crystal panel in a vehicle head apparatus including a liquid crystal panel unit and an optical system that enlarges or reduces the driving information image displayed on the liquid crystal panel unit and adjusts the focus to reflect the reflection on the windshield of the vehicle. The panel unit includes a case, a liquid crystal panel provided at the front opening of the case, a backlight unit provided at the rear side of the liquid crystal panel, and a cover to block the rear opening of the case. The backlight unit includes a flat panel and a liquid crystal. A plurality of LED elements installed on the flat panel facing the rear side of the panel, and a spacer (Spacer) is provided between the liquid crystal panel and the flat panel so that the LED elements can maintain a constant distance from the liquid crystal panel.

Description

BACK LIGHT UNIT OF HUD SYSTEM FOR AUTOMOTIVE VEHICLES}

The present invention relates to a backlight unit of a vehicle head apparatus, and more particularly, to a backlight of a vehicle head apparatus capable of increasing the clarity of the driving information image displayed on the windshield and providing various information necessary for driving. It's about the unit.

Recently, various devices for convenience and safety of a vehicle driver have been developed. One example is a head up display (HUD) device.

The head device is a device which displays various driving information, for example, vehicle speed, RPM, fuel remaining amount, etc. on the windshield of a vehicle that the driver watches. The LCD system is mainly used.

As shown in FIG. 1, the LCD device includes a liquid crystal panel 10 and a backlight unit 12 provided at a rear side of the liquid crystal panel 10.

The liquid crystal panel 10 is provided inside an instrument panel 10a in front of the driver's seat and displays an input "travel information image". The backlight unit 12 illuminates the rear surface of the liquid crystal panel 10 to provide a light source.

In addition, the LCD-type head device includes an optical system 14 provided in front of the liquid crystal panel 10.

The optical system 14 includes at least one lens 16 installed in front of the liquid crystal panel 10 and a reflection mirror 18 installed at a predetermined angle in front of the lens 16.

The lens 16 serves to enlarge or reduce the "travel information image" displayed on the liquid crystal panel 10 to an appropriate size and to adjust the focus.

The reflection mirror 18 reflects the "driving information image" emitted from the lens 16 to the windshield 19 of the vehicle. Thus, the "travel information image" can be displayed on the windshield 19 of the vehicle.

Since the head device displays various driving information on the windshield 19, the driver can check the driving information of the vehicle without directly looking at the instrument panel installed in the instrument panel 10a.

However, such a conventional head device has a disadvantage that the "driving information image" displayed on the liquid crystal panel 10 is too dark. Due to this disadvantage, the sharpness of the "driving information image" displayed on the windshield 19 is inferior. This is being pointed out.

In particular, the liquid crystal panel 10 displays a driving information image having a relatively low illuminance compared to the amount of sunlight in the middle of the day when there is a large amount of sunlight, and in this case, a clear "driving information image" cannot be displayed. The problem is pointed out.

In addition, the head apparatus needs to variously display not only "vehicle basic information" such as vehicle speed, RPM, fuel remaining amount, etc., but also all information necessary for driving the vehicle. In particular, it is important to provide the driver of the vehicle with all the information necessary for driving by displaying the "navigation information" and "real time traffic information" and the surrounding conditions of the vehicle. Only then, it is possible to induce a safe driving by preventing unnecessary movement of the driver's eyes.

The present invention has been made to solve the above-mentioned conventional problems, the purpose of which is to improve the brightness of the driving information image displayed on the liquid crystal panel, for a vehicle that can increase the sharpness of the driving information image displayed on the windshield It is to provide a backlight unit of the head device.

Another object of the present invention is to provide a backlight unit of a vehicle head apparatus for allowing a driver to easily and quickly recognize a driving information image by increasing the sharpness of the driving information image displayed on the windshield.

The backlight unit of the vehicle head apparatus of the present invention for achieving the above object includes a liquid crystal panel unit and an optical system that enlarges or reduces the driving information image displayed on the liquid crystal panel unit and adjusts the focus to reflect the reflection on the windshield of the vehicle. In the vehicle head device, wherein the liquid crystal panel unit, the liquid crystal panel is provided in the case, the liquid crystal panel provided in the front opening of the case, the backlight unit provided in the rear side of the liquid crystal panel, and the cover for blocking the rear opening of the case The backlight unit may include a flat panel, a plurality of LED elements installed in the flat panel to face the rear surface of the liquid crystal panel, and the LED elements to maintain a constant distance from the liquid crystal panel. It characterized in that it comprises a spacer (Spacer) provided between the panel and the flat panel.

Preferably, the apparatus further includes a plurality of heat dissipation fins extending toward the rear side from the rear side of the cover to dissipate heat generated in the backlight unit.

In addition, a reflection sheet for reflecting light generated from the LED device on the rear surface of the liquid crystal panel is installed on an inner wall surface of the case between the liquid crystal panel and the LED device.

According to the backlight unit of the vehicle head apparatus according to the present invention, by improving the structure of the backlight unit, it is possible to improve the brightness of the "travel information image" displayed on the liquid crystal panel. Therefore, there is an effect that can increase the sharpness of the "travel information image" displayed on the windshield.

In addition, by increasing the sharpness of the "travel information image" displayed on the windshield, the driver can recognize the "travel information image" easily and quickly. Therefore, there is an effect that helps safe driving of the vehicle.

In addition, since the present invention has a structure that can display not only the basic information of the vehicle but also various information necessary for driving, the driver's convenience is improved as much as possible. In particular, by improving the convenience of the driver, there is an effect to enable the safe operation by preventing the driver's unnecessary eye movement.

1 is a view showing the configuration of a conventional vehicle head device,
2 is a block diagram showing a vehicle head apparatus according to the present invention;
3 is an exploded perspective view showing a backlight unit of a liquid crystal panel of the present invention;
4 is a cross-sectional view taken along the line IV-IV of FIG. 3;
5 is a perspective view showing an optical system constituting the head device of the present invention.

Best Mode for Carrying Out the Invention A preferred embodiment of a backlight unit of a vehicle head apparatus according to the present invention will now be described in detail with reference to the accompanying drawings (the same components will be described with the same reference numerals).

First, referring to FIG. 2, a vehicle head apparatus according to the present invention includes a liquid crystal panel unit 20.

As shown in FIGS. 3 and 4, the liquid crystal panel unit 20 includes a case 22, a liquid crystal panel 24 provided at the front opening 22a of the case 22, and a liquid crystal panel 24. The backlight unit 26 is provided at a rear side of the back panel at a predetermined interval l, and a cover 28 for blocking the rear opening 22b of the case 22 is provided.

The liquid crystal panel 24 displays "running information image". The backlight unit 26 illuminates the rear surface of the liquid crystal panel 24 and includes a flat panel 26a and a plurality of LED elements 26b provided on the flat panel 26a.

In particular, the LED elements 26b are provided toward the rear side of the liquid crystal panel 24, and are installed without gaps by matching rows and columns. The LED elements 26b thus installed illuminate the entire rear surface of the liquid crystal panel 24 with uniform illumination. Thus, the brightness of the "travel information image" shown on the liquid crystal panel 24 is improved. As a result, the " travel information image " of the liquid crystal panel 24 reflected on the windshield 19 (see FIG. 1) can have high luminance and clarity. As a result, the driver of the vehicle can recognize it more easily and quickly.

On the other hand, the liquid crystal panel 24 and the backlight unit 26 are arranged by a spacer 26c at a sufficient interval l. This is to minimize the heat generated by the backlight unit 26 affecting the liquid crystal panel 24. This extends the life of the liquid crystal panel 24.

In addition, a reflection sheet 26d is provided on the inner wall surface of the case 22 between the liquid crystal panel 24 and the LED element 26b. The reflection sheet 26d reflects the light generated by the LED element 26b on the rear surface of the liquid crystal panel 24. Therefore, the loss of light illuminated from the LED element 26b to the liquid crystal panel 24 is minimized.

In addition, a plurality of heat dissipation fins 29 are installed on the cover 28 of the case 22. The heat dissipation fins 29 extend rearward from the back of the cover 28, and the heat dissipation fins 29 thus extended serve to dissipate heat generated from the LED elements 26b to the outside.

Referring again to FIG. 2, the head device of the present invention includes an optical system 30.

As shown in FIG. 5, the optical system 30 includes at least one reflector 32, 34, 36 that sequentially reflects a “driving information image” of the liquid crystal panel 24 along a specific path.

The reflecting mirrors 32, 34, 36 include a first reflecting mirror 32 provided in front of the liquid crystal panel 24, a second reflecting mirror 34 provided in front of the first reflecting mirror 32, and a second reflecting mirror. A third reflecting mirror 36 is provided in front of the 34.

The first reflecting mirror 32 is arranged in the lateral direction at an angle of about 40 ° to 50 ° with respect to the liquid crystal panel 24. The first pretreatment reflector 32 thus arranged reflects the " driving information image "

The second reflecting mirror 34 is arranged in the lateral direction at an angle of about 85 ° to 95 ° with respect to the first reflecting mirror 32. The second reflector 34 thus arranged reflects the "travel information image" reflected by the first reflector 32 in the lateral direction at an angle ranging from about 85 ° to 95 °.

The third reflecting mirror 36 is provided toward the side surface direction and the upper surface direction of the second reflecting mirror 34. In particular, the second reflecting mirror 34 is provided in the lateral direction at an angle of about 40 ° to 50 degrees, and the second reflecting mirror 34 is installed in the upper surface direction of about 40 degrees to 50 degrees.

The third reflecting mirror 36 thus installed reflects the "travel information image" reflected by the second reflecting mirror 34 upward. In particular, it reflects to the lens 38 mentioned later.

The first to third reflecting mirrors 32, 34 and 36 may have a completely flat reflecting surface, and may have a concave curvature or a convex curvature in some cases. Reflective surfaces of various shapes are appropriately selected and used to correct image distortion caused by the projection angle, projection distance, etc. with respect to the windshield 19 (see Fig. 1).

The optical system 30 also includes lenses 38 that adjust the "travel information image" reflected through the first through third reflectors 32, 34, 36.

The lenses 38 are constituted by a combination of Maniscus Lenses, the lenses 38 thus configured are " driving information images " reflected through the first to third reflectors 32, 34 and 36. It enlarges or contracts to an appropriate size, adjusts the focus, and reflects the adjusted "driving information image" to the windshield 19 (see FIG. 1) of the vehicle. Thus, the "travel information image" projected onto the windshield 19 can have an optimal size and focus.

Referring back to FIG. 2, the head device of the present invention includes a power supply unit 40 and a control unit 50.

The power supply unit 40 serves as a driving power source for the vehicle, and provides DC12V power applied to the liquid crystal panel unit 20 and various devices.

The controller 50 includes a microprocessor and a driving circuit, and is connected to a controller (not shown) of the vehicle through the CAN communication unit 52.

The connected controller 50 receives current vehicle information, for example, vehicle speed, RPM, fuel remaining amount, coolant temperature, and the like from the controller of the vehicle, and processes the received data to process the liquid crystal panel of the liquid crystal panel unit 20. 24 and the backlight unit 26 are controlled.

Therefore, the liquid crystal panel 24 can display the driving information of the vehicle. As a result, the image " driving information of the vehicle " can be displayed on the windshield 19 of the vehicle (see FIG. 1).

For reference, CAN communication is a network device that allows information exchange between electronic devices, and enables information to be exchanged between the main controller of the vehicle and the control unit 50 of the head device.

On the other hand, the control part 50 further includes the setting value input part 54. The set value input section 54 is composed of buttons provided in the instrument panel 10a (see FIG. 1) in front of the driver's seat, and the driving information displayed on the liquid crystal panel section 20 as the user operates. Type, driving information Allows you to set the size, position, and color of the image.

Referring back to FIG. 2, the head device of the present invention further includes an external device input unit 60.

The external device input unit 60 is configured as an input terminal capable of connecting an external device, for example, a navigation system 62, a camera 64 for capturing the surrounding image of the vehicle, and the like.

The external device input unit 60 introduces various types of data input from an external device such as the navigation device 62 and the camera 64 into the device and then provides the data to the controller 50.

Meanwhile, the controller 50 processes the image data of the navigation device 62 and the camera 64 input from the external device input unit 60 and then displays the processed image data on the liquid crystal panel 24. The liquid crystal panel unit 20 is controlled. Therefore, the surrounding image and the navigation information of the vehicle can be displayed on the windshield 19 of the vehicle.

In some cases, the external device input unit 60 may further include a wireless interface device 70 capable of receiving real-time traffic information.

The wireless interface device 70 is composed of a wireless communication network, for example, a WiBro Modem, an HSDPA modem, and the like, and receives traffic information provided in real time from a Traffic Control Surveillance Center. .

The wireless interface device 70 receives the real-time traffic information and transmits the real-time traffic information to the controller 50 so that the liquid crystal panel 24 displays the real-time traffic information on the windshield 19 of the vehicle.

Therefore, the driver of the vehicle can quickly recognize the current vehicle increase situation, road regulation situation, traffic accident status and the like. As a result, the driver can drive while appropriately responding to current traffic and road conditions.

For reference, the Traffic Control Center is a comprehensive management center for traffic services. It collects, analyzes, and stores various road and traffic information in Seoul and the region, which are input through closed circuits, correspondents, and information sources. Provides real-time information on traffic, regulatory and traffic accidents.

According to the present invention having such a configuration, by improving the structure of the backlight unit 26, the brightness of the "travel information image" shown in the liquid crystal panel 24 can be improved. Therefore, the sharpness of the "travel information image" displayed on the windshield 19 can be improved.

In addition, by increasing the sharpness of the "travel information image" displayed on the windshield 19, the driver can recognize the "travel information image" easily and quickly. Therefore, it helps to drive the vehicle safely.

In addition, since the present invention has a structure that can display not only the basic information of the vehicle but also various information necessary for driving, the driver's convenience is improved as much as possible. In particular, by improving the convenience of the driver, it is possible to prevent the driver's unnecessary gaze movement to enable safe driving.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

19: front glass 20: liquid crystal panel
22: Case 22a: Front opening of the case
22b: rear opening of case 24: liquid crystal panel
26: Back-Light Unit
26a: flat panel 26b: LED device
26c: Spacer 26d: Reflective Sheet
28: Cover 29: Heat dissipation fin
30: optical system 32: first reflecting mirror
34: second reflector 36: third reflector
38: Lens 40: power supply
50: control unit 52: CAN communication unit
54: set value input unit 60: external device input unit
62: Navigation system
64: camera 70: wireless interface device

Claims (4)

In the vehicle head device including a liquid crystal panel unit 20 and an optical system 30 for enlarging or reducing the driving information image displayed on the liquid crystal panel unit 20 and adjusting the focus to reflect the reflection on the windshield 19 of the vehicle. In
The liquid crystal panel unit 20,
The case 22, the liquid crystal panel 24 provided in the front opening part 22a of the case 22, the backlight unit 26 provided in the rear side of the liquid crystal panel 24, and the said case 22 It has a cover 28 for blocking the rear opening (22b) of),
The backlight unit 26 includes a flat panel 26a, a plurality of LED elements 26b provided on the flat panel 26a so as to face the rear surface of the liquid crystal panel 24, and the LED elements 26b. For example, the vehicle includes a spacer 26c provided between the liquid crystal panel 24 and the flat panel 26a so that the plurality of liquid crystal panels 24 may maintain a predetermined distance l from the liquid crystal panel 24. Backlight unit of the head device. The method of claim 1,
And a plurality of heat dissipation fins (29) extending rearward from the rear surface of the cover (28) so as to dissipate heat generated in the backlight unit (26). 3. The method according to claim 1 or 2,
On the inner wall surface of the case 22 between the liquid crystal panel 24 and the LED element 26b, a reflecting sheet 26d reflects light generated by the LED element 26b to the rear surface of the liquid crystal panel 24. Back light unit of the vehicle head device, characterized in that the installation. 4. The method according to any one of claims 1 to 3,
And a controller 50 electrically connected to the backlight unit 26 to control the backlight unit 26.
The control unit 50 is connected to each other via the controller of the vehicle and the CAN communication unit 52, the backlight unit of the vehicle head device.

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