JP6528979B2 - Head-up display device - Google Patents

Description

The present invention relates to a head-up display device disposed on the top of a meter unit.

For example, a head-up display device is used to provide road guidance to the driver of the vehicle. Information from the head-up display device is generally displayed above a meter unit in which instruments are stored so that the amount of movement of the driver's line of sight may be small. The driver can drive while referring to the information displayed above the meter unit. As a prior art 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 the top of the meter unit.

Here, of 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 the present invention is to provide a head-up display device capable of easily performing wiring connection work.

According to the first aspect of the present invention, a display on which information is displayed, a backlight substrate supporting a backlight for illuminating the display, and one end portion connected to the backlight substrate, the display and the display A display unit having a first wiring portion through which a signal for controlling a backlight flows , and a second wiring through which a signal for controlling the display flows, which connects between the backlight substrate and the display , A head-up display device characterized by the present invention 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 part is connected to the surface of the back light substrate opposite to the side where the heat sink is provided.

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

According to the present invention, it is possible to provide a head-up display device capable of easily performing wiring connection work.

In the first aspect of the present invention, only the first wiring portion may be connected to the control substrate, as compared to the case where the first wiring portion and the second wiring portion are attached to the control substrate. This simplifies wiring connection work.

In the invention according to claim 2, the first wiring portion and the second wiring portion are connected to the surface of the backlight substrate opposite to the surface on which the heat dissipation plate is provided. Thereby, a heat sink can be attached to the whole one side of a back light board. A wide heat dissipation area can be secured, and heat can be dissipated more efficiently.

In the invention according to claim 3, the first wiring portion is located below the backlight. The meter unit and the control board are provided below the backlight. By positioning the first wiring portion below the backlight, the entire length of the first wiring portion can be shortened.

FIG. 1 is a diagram showing a vehicle equipped with a head-up display device according to an embodiment of the present invention. It is line 2-2 in FIG. 1 sectional drawing. FIG. 3 is an enlarged view of part 3 of FIG. 2; It is a front view of the backlight shown by FIG. 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 a head-up display device according to the embodiment shown in FIG. 2 with a head-up display device according to a comparative example.

Embodiments of the present invention will be described below based on the attached drawings. In the description, the left and right refer to the left and right with respect to the occupant of the vehicle, and the front and back refer to the front and back with respect to the traveling direction of the vehicle. Further, in the figure, Fr indicates the front, Rr indicates the rear, Le indicates the occupant's left, Ri indicates the occupant's right, Up indicates the upper, and Dn indicates the lower. <Example>

A head-up display device according to an embodiment of the present invention will be described by 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 car and is shown in a state of looking forward 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. In front of the meter unit 20, a windshield 15 is provided.

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

The speedometer 30 includes a control board 31 housed inside the case 25 of the meter unit 20, a motor 32 provided at the front of the control board 31 and controlled by the control board 31, and a tip of the motor 32. And a pointer 33 attached. The motor 32 is provided on the front side with reference to the control board 31, and the hands 33 are provided on the rear side.

The head-up display device 40 includes a display unit 50 attached to an upper portion of a housing 25 of the meter unit 20, and a mirror unit 42 disposed behind the display unit 50 and reflecting light from the display unit 50 forward. A projection surface portion 43 swingably provided on the upper portion of the display unit 50 and onto which the light reflected by the mirror unit 42 is projected, and a cover which the projection surface portion 43 penetrates and covers the display unit 50 and the mirror unit 42 It consists of 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, the mirror unit 42, the projection surface portion 43, and the cover 44 are attached to the top of the meter unit 20.

Please refer to FIG. The display unit 50 includes a stay 51 attached to the housing 25, a heat dissipation plate 52 attached to the rear of the stay 51, a backlight unit 53 attached to the rear surface of the heat dissipation plate 52, and the backlight unit A light box 54 disposed at the rear of the 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 the light emitted from the backlight unit 53, and And a display 57 for displaying the information attached and projected on the projection surface 43 (see FIG. 2).

Please refer to FIG. The backlight unit 53 is configured by mounting six backlights 53 b made of LEDs or the like on the backlight substrate 53 a.

Please refer to FIG. The first wiring portion 58 is connected from the upper end of the control substrate 31 to the lower portion of the rear surface of the backlight substrate 53a. Furthermore, the second wiring portion 59 is connected from the upper rear surface of the backlight substrate 53a to the display 57. For the first wiring portion 58 and the second wiring portion 59, flexible wiring such as flexible printed circuit (FPC) or flexible flat cable (FFC) is adopted.

The first wiring portion 58 and the second wiring portion 59 are detachably provided to the backlight substrate 53a via the 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 of the display 57. The control board 31 is a control unit of the meter unit 20 and also serves as a control unit of the backlight 53 b and the display unit 57. A connector 31 a for connecting the first wiring portion 58 is provided on the top of the front surface of the control board 31.

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

The projection surface portion 43 includes a combiner holder 43a supported swingably by the stay 51, and a combiner 43b which is held by the combiner holder 43a and onto which light is projected.

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

The heat generated by the lighting of the backlight 53b is released from the heat sink 52 in contact with the front surface of the backlight substrate 53a. A stay opening 51 a for exposing the heat sink 52 is formed in the stay 51.

The stay 51 and the heat radiation plate 52 can be integrally formed of a member having high thermal conductivity such as aluminum. The heat capacity can be increased to improve the heat dissipation. A heat conductive sheet can also be provided between the heat sink 52 and the backlight substrate 53a. In this case, the heat of the backlight 53b can be dissipated 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 substrate 31 (see FIG. 2) housed in the meter unit 20. Specifically, the stay 51 is fixed to the housing 25 by the bolts 61 and 61, and the first wiring portion 58 is connected to the control board 31 (see FIG. 2).

Refer to FIG. 6 (a). A head-up display device 140 according to comparative example 1 is shown in FIG. 6 (a). The head-up display device 140 has a control board 131 b different from the control board 131 a of the meter unit 120. The backlight 153 b and the display unit 157 are connected to the control board 131 b.

According to the head-up display device 140 according to Comparative Example 1, since the control substrate 131 b is included in the head-up display device 140, the number of parts is increased and the device is enlarged.

Refer to FIG. 6 (b). A head-up display device 240 according to comparative example 2 is shown in FIG. In the head-up display device 240, a control substrate 231 for controlling the backlight 253 b and the display unit 257 is accommodated in the meter unit 220.

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

However, when attaching the head-up display device 240 to the meter unit 220, an operation of connecting the first wiring portion 258 and the second wiring portion 259 to the control substrate 231 is required, and the attachment operation takes time.

Refer to FIG. 6 (c). FIG. 6C shows a head-up display device 40 according to the embodiment. The display unit 57 and the control board 31 for controlling the backlight 53 b are housed in the meter unit 20. That is, part of the components of the head-up display device 40 was housed in the meter unit 20. As a result, the number of parts of the head-up display device 40 can be reduced and the size thereof can be reduced.

In addition, the display 57 is connected to the control board 31 via the backlight 53b. Referring also to FIG. 5, the head-up display device 40 is unitized and attached to the top of the meter unit 20. If the first wiring portion 58 and the second wiring portion 59 are attached to the control board 31 at the time of attachment, the attachment work to the meter unit 20 may be extended for a long time. By connecting the second wiring portion 59 to the display 57 from the backlight 53 b, only the first wiring portion 58 may be connected to the control board 31 when the meter unit 20 is attached. The mounting operation of the meter unit 20 can be easily performed. Moreover, the conveyance of the head-up display device 40 can be facilitated by reducing the wiring exposed to the outside.

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 dissipation plate 52 is in contact. . Thereby, the heat sink 52 can be attached to the whole one surface of the back light board | substrate 53a. A wide heat dissipation area can be secured, and heat can be dissipated more efficiently.

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

Please refer to FIG. The back light substrate 53a is disposed so that at least a part thereof is in contact with the extension line L1 which extends the control substrate 31 upward. By arranging the backlight substrate 53 a in the vicinity of the control substrate 31, the entire length of the first wiring portion 58 can be shortened.

Furthermore, the control board 31 is integral with the control board 31 for controlling the speedometer 30 (meter 30) housed in the meter unit 20. Thereby, 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 hands 33 of the speedometer 30. Thereby, the control board 31 can be disposed at a higher position of the meter unit 20. The distance to the backlight 53 b disposed above the meter unit 20 can be shortened, and the first wiring portion 58 can be further shortened.

In addition, although the head-up display apparatus by this invention was demonstrated based on the example mounted in the vehicle, it is applicable also to vehicles other than a vehicle, a working machine, a construction machine, etc. Furthermore, the head-up display device according to the present invention is applicable not only to the projection surface unit integral type but also to a type projecting onto a windshield. Furthermore, the information projected on the projection surface part can select any information other than the road guidance.

That is, the present invention is not limited to the examples as long as the functions and effects of the present invention can be achieved.

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 apparatus 52 ... Heat sink 53a ... Backlight board 53b ... Backlight 57 ... Display 58 ... 1st wiring part 59 ... 2nd wiring part

Claims (3)

A display on which information is displayed, a backlight substrate supporting a backlight for illuminating the display , an end portion connected to the backlight substrate, and 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 the side opposite to the side on which the plate is provided. The head-up according to claim 1 or 2, wherein the first wiring portion is located below the backlight, and the second wiring portion is located above the backlight. Display device.

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