JP2018197108A - Head-up display device - Google Patents

Abstract

To achieve downsizing of a head-up display device attached to an upper part of a meter unit.SOLUTION: In a head-up display device (40), an indicator (57) in which information is displayed and a back light (53b) which emits light to the indicator (57) are disposed on a meter unit (20). A control board (31) for controlling the indicator (57) and the back light (53b) is housed in the meter unit (20). The head-up display device (40) has a first wiring part (58) which connects the control board (31) to the back light (53b) and a second wiring part (59) which connects the back light (53b) to the indicator (57).SELECTED DRAWING: Figure 3

Description

The present invention relates to a head-up display device disposed on an upper part of a meter unit.

For example, a head-up display device is used to provide road guidance to the driver of the vehicle. In general, information from the head-up display device is displayed above a meter unit in which instruments are accommodated so that the amount of movement of the driver's line of sight is small. The driver can drive while referring to the information displayed above the meter unit. As a conventional technique related to such a head-up display device, there is a technique disclosed in Patent Document 1.

FIG. 3 of Patent Document 1 discloses that a unitized head-up display device is attached to an upper portion of a meter unit.

Here, in the upper part of the meter unit, the space that can be used for mounting the head-up display device is limited. Miniaturization of the head-up display device is desired.

JP 2014-91466 A

An object of this invention is to provide the head-up display apparatus which can perform the connection operation | work of wiring easily.

According to the first aspect of the present invention, a display device for displaying information, a backlight substrate for supporting a backlight for illuminating the display device, and one end portion connected to the backlight substrate, the display device and the display device a first wiring section that flows signal for controlling the backlight, the connecting backlight substrate and to said display, comprising a display unit having a, a second wiring to which a signal for controlling the flow through the indicator, that A head-up display device is provided.

As described in claim 2, preferably, on a surface of the backlight board, the heat radiating plate is provided for dissipating heat generated in the backlight, the first wiring portion and the second wiring The portion is connected to the surface of the backlight substrate opposite to the side where the heat dissipation plate is provided.

As described in claim 3, preferably, the first wiring portion is located below the backlight, and the second wiring portion is located above the backlight.

ADVANTAGE OF THE INVENTION According to this invention, the head up display apparatus which can perform the connection operation | work of wiring easily can be provided.

In the invention according to claim 1, it is only necessary to connect only the first wiring part to the control board as compared with the case where the first wiring part and the second wiring part are each attached to the control board. This simplifies wiring connection work.

In the invention which concerns on Claim 2, the 1st wiring part and the 2nd wiring part are connected to the surface on the opposite side to the heat sink provided in the backlight board | substrate. Thereby, a heat sink can be attached to the whole surface of the backlight substrate. A large heat radiation area can be secured, and heat can be radiated more efficiently.

In the invention which concerns on Claim 3, the 1st wiring part is located under the backlight. The meter unit and the control board are provided below the backlight. By positioning the first wiring portion below the backlight, the overall length of the first wiring portion can be shortened.

1 is a view showing a vehicle equipped with a head-up display device according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a three-part enlarged view of FIG. 2. FIG. 3 is a front view of the backlight shown in FIG. 2. It is a disassembled perspective view explaining the effect | action of the head-up display apparatus shown by FIG. FIG. 3 is a diagram comparing the head-up display device according to the embodiment shown in FIG. 2 and the head-up display device according to a comparative example.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left and right refer to the left and right based on the vehicle occupant, and front and rear refer to the front and rear based on the traveling direction of the vehicle. In the figure, Fr indicates the front, Rr indicates the rear, Le indicates the left when viewed from the occupant, Ri indicates the right when viewed from the occupant, Up indicates the upper side, and Dn indicates the lower side. <Example>

A head-up display device according to an embodiment of the present invention will be described taking a case where it is mounted on a vehicle as an example.

Please refer to FIG. The vehicle 10 is a right-hand drive vehicle and is shown in a state in which the front is viewed from the driver's seat. For convenience of explanation, the vehicle 10 is shown with the steering wheel removed.

In front of the driver's seat, an instrument panel 11 extends in the vehicle width direction, and a meter unit 20 is attached to the instrument panel 11. The meter unit 20 includes a speedometer 30, a tachometer 22, a fuel meter 23, and an odometer 24. A windshield 15 is provided in front of the meter unit 20.

Please refer to FIG. A head-up display device 40 is attached to the upper part of the meter unit 20.

The speedometer 30 includes a control board 31 housed in the housing 25 of the meter unit 20, a motor 32 provided in front of the control board 31 and controlled by the control board 31, and a tip of the motor 32. And an attached pointer 33. With reference to the control board 31, the motor 32 is provided on the front side, and the pointer 33 is provided on the rear side.

The head-up display device 40 includes a display unit 50 attached to the upper portion of the housing 25 of the meter unit 20, a mirror unit 42 that is disposed behind the display unit 50 and reflects light from the display unit 50 forward, A projection surface portion 43 that is provided on the upper portion of the display unit 50 so as to be swingable and onto which the light reflected by the mirror unit 42 is projected, and a cover that passes through the projection surface portion 43 and covers the display unit 50 and the mirror unit 42. 44.

Although details will be described later, the display unit 50, the mirror unit 42, the projection surface portion 43, and the cover 44 are sub-assembled and integrated. That is, the integrated display unit 50, mirror unit 42, projection surface portion 43, and cover 44 are attached to the upper portion of the meter unit 20.

Please refer to FIG. The display unit 50 includes a stay 51 attached to the housing 25, a heat sink 52 attached to the rear portion of the stay 51, a backlight unit 53 attached to the rear surface of the heat sink 52, and the backlight unit. A light box 54 disposed at the rear of 53 and attached to the stay 51; a condenser lens 55 and a lenticular lens 56 which are supported by the light box 54 and transmit light emitted from the backlight unit 53; And a display 57 for displaying information to be projected and projected onto the projection surface 43 (see FIG. 2).

Please refer to FIG. The backlight unit 53 includes six backlights 53b made of LEDs or the like mounted on a backlight substrate 53a.

Please refer to FIG. A first wiring part 58 is connected from the upper end of the control board 31 to the lower part of the rear surface of the backlight board 53a. Further, a second wiring portion 59 is connected from the upper rear surface of the backlight substrate 53a to the display 57. For the first wiring part 58 and the second wiring part 59, flexible wiring such as FPC (Flexible Printed Circuit) or FFC (Flexible Flat Cable) is adopted.

The first wiring portion 58 and the second wiring portion 59 are detachably provided on the backlight substrate 53a via connectors 53c and 53d. These connectors 53c and 53d are provided on the same surface on which the backlight 53b of the backlight substrate 53a is mounted.

The control board 31 housed in the meter unit 20 controls the blinking of the backlight 53b and the display information on the display 57. The control board 31 is a control unit for the meter unit 20, and also serves as a control unit for the backlight 53 b and the display device 57. A connector 31 a for connecting the first wiring part 58 is provided on the upper part of the front surface of the control board 31.

Reference is made only to FIG. The mirror unit 42 includes a mirror holder 42a attached to the upper portion of the housing 25 of the meter unit 20, and a mirror 42b held by the mirror holder 42a.

The projection surface portion 43 includes a combiner holder 43a that is supported by the stay 51 so as to be swingable, and a combiner 43b that is held by the combiner holder 43a and projects light.

For example, when it is time for the vehicle 10 to make a right turn, an arrow for prompting a right turn is displayed on the display device 57. The light from the backlight 53b illuminates the display 57. The light that has passed through the display device 57 is reflected forward by the mirror 42b, passes through the opening 44a of the cover 44, and is projected onto the combiner 43b. The driver Mn recognizes that it is time to turn right by visually recognizing the virtual image of the right-pointing arrow projected on the combiner 43b.

The heat generated when the backlight 53b is turned on is released from the heat radiating plate 52 that is in contact with the front surface of the backlight substrate 53a. The stay 51 is formed with a stay opening 51 a for exposing the heat radiating plate 52.

Note that the stay 51 and the heat radiating plate 52 can be integrally formed of a member having high thermal conductivity such as aluminum. The heat capacity can be increased to improve heat dissipation. Further, a heat conductive sheet can be provided between the heat dissipation plate 52 and the backlight substrate 53a. In this case, the heat of the backlight 53b can be radiated efficiently.

Please refer to FIG. The head-up display device 40 is attached to the meter unit 20 after being unitized except for the control board 31 (see FIG. 2) housed in the meter unit 20. Specifically, the stay 51 is fixed to the housing 25 by bolts 61 and 61, and the first wiring portion 58 is connected to the control board 31 (see FIG. 2).

Reference is made to FIG. FIG. 6A shows a head-up display device 140 according to Comparative Example 1. The head-up display device 140 has a control board 131b different from the control board 131a of the meter unit 120. A backlight 153b and a display unit 157 are connected to the control board 131b.

According to the head-up display device 140 according to the comparative example 1, since the control board 131b is included in the head-up display device 140, the number of parts increases and the device is increased in size.

Reference is made to FIG. FIG. 6B shows a head-up display device 240 according to Comparative Example 2. In the head-up display device 240, a control board 231 for controlling the backlight 253b and the display unit 257 is housed in the meter unit 220.

According to the head-up display device 240 according to the comparative example 2, the number of parts can be reduced and the device can be downsized (see α) as compared with the head-up display device 240 according to the comparative example 1.

However, when the head-up display device 240 is attached to the meter unit 220, it is necessary to connect the first wiring part 258 and the second wiring part 259 to the control board 231, and the attachment work takes time.

Reference is made to FIG. FIG. 6C shows a head-up display device 40 according to the embodiment. The display 57 and the control board 31 for controlling the backlight 53b are accommodated in the meter unit 20. That is, some of the components of the head-up display device 40 are accommodated in the meter unit 20. Thereby, reduction of the number of parts of the head-up display device 40 and size reduction can be achieved.

In addition, the display device 57 is connected to the control board 31 through the backlight 53b. Referring also to FIG. 5, the head-up display device 40 is unitized and attached to the upper part of the meter unit 20. If the first wiring part 58 and the second wiring part 59 are each attached to the control board 31 during attachment, the attachment work to the meter unit 20 may take a long time. By connecting the second wiring portion 59 from the backlight 53b to the display device 57, only the first wiring portion 58 may be connected to the control board 31 when the meter unit 20 is attached. The work of attaching the meter unit 20 can be easily performed. Further, by reducing the wiring exposed to the outside, the head-up display device 40 can be easily transported.

Referring to FIG. 3, the first wiring portion 58 and the second wiring portion 59 are connected to the surface of the backlight substrate 53a opposite to the side where the heat sink 52 is in contact. . Thereby, the heat sink 52 can be attached to the entire surface of the backlight substrate 53a. A large heat radiation area can be secured, and heat can be radiated more efficiently.

Further, the first wiring part 58 is located below the backlight 53b. The meter unit 20 and the control board 31 are provided below the backlight 53b. By positioning the first wiring part 58 below the backlight 53b, the entire length of the first wiring part 58 can be shortened.

Please refer to FIG. The backlight substrate 53a is arranged so that at least a part thereof is in contact with an extension line L1 obtained by extending the control substrate 31 upward. By disposing the backlight substrate 53a in the vicinity of the control substrate 31, the overall length of the first wiring portion 58 can be shortened.

Further, the control board 31 is integral with the control board 31 for controlling the speedometer 30 (instrument 30) housed in the meter unit 20. As a result, the number of parts can be further reduced.

Furthermore, the upper end of the control board 31 is located above the motor 32 for operating the pointer 33 of the speedometer 30. Thereby, the control board 31 can be arranged at a higher position of the meter unit 20. The distance to the backlight 53b arrange | positioned at the upper part of the meter unit 20 can be shortened, and the 1st wiring part 58 can be shortened further.

Although the head-up display device according to the present invention has been described based on an example mounted on a vehicle, the head-up display device can also be applied to vehicles other than vehicles, work machines, construction machines, and the like. Furthermore, the head-up display device according to the present invention is not limited to the projection surface unit integrated type, but can be applied to a type that projects onto the windshield. Furthermore, as the information projected on the projection surface portion, arbitrary information can be selected in addition to the road guidance.

That is, the present invention is not limited to the examples as long as the operations and effects of the present invention are exhibited.

The head-up display device of the present invention is suitable for a vehicle.

DESCRIPTION OF SYMBOLS 20 ... Meter unit 31 ... Control board 40 ... Head-up display device 52 ... Heat sink 53a ... Backlight board 53b ... Backlight 57 ... Display device 58 ... 1st wiring part 59 ... 2nd wiring part

Claims (3)

A display on which information is displayed; a backlight substrate that supports a backlight that illuminates the display; and one end connected to the backlight substrate, through which a signal for controlling the display and the backlight flows. a first wiring portion, the connecting backlight substrate and to said display, and a second wiring to which a signal for controlling the indicator flows, provided with a display unit having a head-up display apparatus characterized by. On one surface of the backlight board, the heat radiating plate is provided for dissipating heat generated in the backlight, the first wiring portion and the second wiring portion, of the backlight board, the heat dissipation The head-up display device according to claim 1, wherein the head-up display device is connected to a surface opposite to the side on which the plate is provided. 3. The head-up according to claim 1, wherein the first wiring part is located below the backlight, and the second wiring part is located above the backlight. Display device.

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