WO2014178175A1

WO2014178175A1 - Vehicle-mounted display device

Info

Publication number: WO2014178175A1
Application number: PCT/JP2014/002271
Authority: WO
Inventors: 兼青木; 正幸三矢
Original assignee: 株式会社デンソー
Priority date: 2013-04-30
Filing date: 2014-04-23
Publication date: 2014-11-06
Also published as: JP2014213826A

Abstract

A vehicle-mounted display device attached to a vehicle structural member (4) and equipped with: a main body (1); a display unit (9) which is provided to the front surface part of the main body (1); a substrate (3) which is provided inside the main body (1), and to which an electronic circuit for driving the display unit (9) is mounted; and a heat sink (2) which is provided to the main body (1), and which is thermally connected to the substrate (3). The heat sink (2) has an integrated attachment part (5) for fixing the main body (1) to the vehicle structural member (4). A vehicle-mounted display device further equipped with a plurality of heat dissipation fins (6), wherein the plurality of heat dissipation fins (6) are attached to the heat sink (2) such that the attachment positions thereof can be altered. A vehicle-mounted display device further equipped with a plurality of heat dissipation bodies (7), wherein the plurality of heat dissipation fins (6) are provided to each of the plurality of heat dissipation bodies (7), and the heat dissipation bodies (7) are attached to the heat sink (2) such that the positions thereof can be altered.

Description

In-vehicle display device

Cross-reference of related applications

This disclosure is based on Japanese Patent Application No. 2013-95276 filed on April 30, 2013, the contents of which are incorporated herein.

The present disclosure relates to an in-vehicle display device mounted on a vehicle.

A display device mounted on a vehicle and used for, for example, a map display of a car navigation device or various displays of instruments is an electronic device in which a liquid crystal display panel, a backlight unit, and a control circuit for controlling them are mounted in a housing. A circuit board and the like are provided. In this type of in-vehicle display device, a cooling fan device for dissipating the heat generated inside and suppressing the temperature rise is provided in the housing (see, for example, Patent Document 1). .

JP 2007-83858 A

However, in the above conventional configuration, since the cooling fan device is provided for heat dissipation of the electronic circuit board or the like, there is a problem that the configuration becomes complicated and the cost is increased, and the whole size is increased.

The present disclosure has been made in view of the above circumstances, and an object thereof is to provide an in-vehicle display device that can effectively dissipate heat while suppressing a rise in internal temperature while having a simple configuration. There is to do.

In order to achieve the above object, an in-vehicle display device attached to a vehicle structural material according to one aspect of the present disclosure includes a main body, a display unit provided on a front surface of the main unit, and the display provided in the main unit. And a heat sink that is provided on the main body and is thermally connected to the board, and the heat sink fixes the main body to the vehicle structural material. Are integrally provided.

According to the above configuration, when the components constituting the electronic circuit mounted on the board generate heat, the heat is radiated to the outside through the heat radiating plate thermally connected to the board. The rise is suppressed. At this time, the heat radiating plate is integrally provided with a mounting portion, and the main body is fixed to the vehicle structural member by the mounting portion.

Thus, the heat of the heat radiating plate is transmitted to the vehicle structural material through the mounting portion, and heat radiation through the vehicle structural material can be expected, so that the heat radiation effect can be further enhanced. In this case, a sufficient heat dissipation effect can be obtained without performing forced cooling by the fan device. Therefore, according to the in-vehicle display device of this aspect, unlike the case where the fan device is provided, it is possible to effectively dissipate heat while suppressing the internal temperature rise while having a simple configuration. Has an effect.

The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing
FIG. 1A is a perspective view showing a state in which a heat sink is attached to the main board of one embodiment, and FIG. 1B is a right side view showing a state in which the heat sink is attached to the main board of one embodiment. It is. FIG. 2A is a front view showing a mounting state of the heat sink of the embodiment with respect to the lean force, and FIG. 2B is a right side view showing a mounting state of the heat sink of the embodiment with respect to the lean force. . It is a rear view of the state which attached the heat sink to the main board | substrate.

Hereinafter, an embodiment of a display device (display unit) for an in-vehicle information communication system mounted on an automobile will be described with reference to the drawings. FIG. 1 shows a main configuration of a main body 1 of a vehicle-mounted display device according to the present embodiment. The main body 1 of the display device includes a display unit 9 and a plastic cover in a container shape such that the front and bottom surfaces open and bulge rearward at the rear of the display unit 9. The display unit 9 has a horizontally long rectangular shape with rounded corners, and includes a display monitor, a plurality of warning display units, and the like.

Although not shown in detail, the main body 1 of the display device includes a heat sink 2, a main board 3 as a board, a sub board, a telltale board, a light guide plate, and a liquid crystal panel in order from the back side to the front side in the cover. A design panel or the like is provided so as to overlap in the front-rear direction. Although not shown, an electronic circuit such as an IC for driving a liquid crystal panel is mounted on the front surface of the main substrate 3, and an amplifier or an external connection is provided on the back surface (back surface) side. Connectors etc. are mounted. The heat radiating plate 2 is provided on the back side of the main substrate 3 and is thermally connected to the main substrate 3. Details of the heat sink 2 will be described later. In that case, the lower half part of the said heat sink 2 is exposed below from a cover.

Thus, a display unit 9 having a design panel disposed on the front surface is provided on the front surface of the main body 1, and an electronic meter such as a speedometer or a tachometer is provided on the display monitor by driving (display control) of the liquid crystal panel. Display, driving monitor, navigation, TV, video images, and the like. In addition, various warning displays such as seat belts, airbags, door opening / closing, brake fluid, engine oil, and the like are displayed on the warning display unit by turning on LEDs on the telltale board.

Although not shown in detail, the main body 1 of the display device is disposed, for example, on an upper surface portion (portion close to the driver's field of view) of a dashboard (instrument panel) in front of the driver's seat. At this time, as will be described in detail later, the main body 1 of the display device is a lean as a vehicle structure so that the display portion 9 is exposed on the upper surface of the dashboard and the lower mounting portion is positioned in the dashboard. It is attached to the force 4 (see FIG. 2).

Now, the heat sink 2 will be described with reference to FIGS. The heat radiating plate 2 is for radiating heat generated from the electronic circuit of the main board 3, particularly the main IC and the amplifier, and is composed of a metal plate material such as a steel plate. Specifically, the heat radiating plate 2 has a main plate portion 2a attached so as to be directed to the back side of the main board 3, and a portion extending in the left-right direction below the main plate portion 2a at a substantially right angle forward. It has a pair of left and right mounting

portions

5, 5 as bent.

The main plate portion 2a is integrally formed with mounting piece portions 2b that are positioned at four positions on the upper, lower, left and right sides, and extend forward, and the heat sink 2 has the tips of the mounting piece portions 2b at the main ends. The main board 3 and the like are screwed so as to be addressed to the back surface of the board 3. The pair of

attachment portions

5 and 5 are provided symmetrically, and each attachment portion 5 is formed with two front and

rear connection holes

5a and 5a, as shown in FIG. These coupling holes 5a are connected to the cover. Further, each mounting portion 5 is formed with a mounting hole 5b located in the lower portion, and is fixed to the lean force 4 as described later.

Further, particularly in the present embodiment, the heat radiating plate 2 includes, for example, four heat radiating bodies 7 having a large number of radiating fins 6 arranged side by side on the back surface of the main plate portion 2a. Each radiator 7 is made of a metal material having good thermal conductivity, and integrally has a plurality (six) of radiation fins 6 extending vertically in one surface (back surface side) of a rectangular bottom plate portion 7a. ing. Therefore, as shown in FIG. 3, the large number of heat dissipating fins 6 are respectively provided in the heat dissipating bodies 7 having a configuration in which the whole is divided into four blocks in the left-right direction.

At this time, each radiator 7 is attached by fixing the bottom plate portion 7a through a mounting hole formed in the main plate portion 2a, but by changing the position (addition) of the mounting hole, each radiator 7 is For example, it can be mounted so that its position can be changed in the vertical direction. 3 and the like show a state in which each radiator 7 is attached to the upper portion of the main plate portion 2a, but the attachment position can be changed at a lower portion of the main plate portion 2a.

The main body 1 of the display device described above is attached to the vehicle as follows. That is, FIG. 2 shows a state in which only the heat radiating plate 2 is taken out from the main body 1 and attached thereto. Here, a lean force 4 as a vehicle structural material is provided extending in the left-right direction inside the dashboard. It has been. The lean force 4 is provided with a pair of left and

right attachment members

8, 8, and although not shown, bolt insertion holes are formed in the distal end portions of the attachment members 8. Thus, the main body 1 addresses the pair of left and right mounting portions 5 provided integrally with the heat radiating plate 2 to the mounting members 8 while overlapping the mounting holes 5b with the bolt insertion holes, for example, not shown. It is fixed using bolts and nuts.

In the display device having the above configuration, the heat generated by the electronic components mounted on the board such as the main board 3 is radiated to the outside through the heat radiating plate 2, thereby suppressing the temperature rise in the main body 1. . At this time, the heat of the heat radiating plate 2 is effectively radiated into the outside air from the heat radiating fins 6 of the heat radiating body 7. In addition to that, the heat of the heat radiating plate 2 is transmitted to the lean force 4 through the mounting portion 5, and heat is also radiated from the vehicle body through the lean force 4.

Thereby, the heat dissipation effect can be further enhanced, and a sufficient heat dissipation effect can be obtained without forced cooling by the fan device. Therefore, according to the in-vehicle display device of the present embodiment, unlike the conventional fan device, the heat radiation from the heat radiating plate 2 is also performed through the lean force 4, so that the configuration is simple. Even though it is completed, it is possible to effectively dissipate heat and to obtain an excellent effect that an internal temperature rise can be suppressed.

In particular, in the present embodiment, the heat dissipating fins 6 provided on the back surface of the heat dissipating plate 2 (main plate portion 2a) are configured to be vertically changeable. The body 7) can be provided at any position. At that time, the position of the heat radiating fins 6 can be changed for each of the heat radiating bodies 7 divided into a plurality of blocks, so that the operation of changing the position of the heat radiating fins 6 can be facilitated.

Although not described in the above embodiment, a camera, a microphone, a buzzer, and the like for photographing inside or outside the vehicle may be provided in the main body 2 (cover) of the display device 1. Moreover, in the said Example, although the four heat radiating bodies 7 which have the heat radiating fin 6 were attached to the heat radiating plate 2 so that a position change was possible respectively, one heat radiating body which has many radiating fins was attached to the heat radiating plate. You may make it attach to 2 so that fixed or position change is possible. Various modifications can be considered for the structure of the heat radiating fins, such as providing a large number of heat radiating fins integrally with the heat radiating plate, or attaching individual heat radiating fins so that their positions can be changed.

Furthermore, various modifications are possible for the specific shape and structure of the heat sink, the shape of the mounting portion of the heat sink, and the mounting structure for the vehicle structural material. In addition, for example, various modifications can be made to the specific configuration of the inside of the main body of the display device, the display mode in the display unit, the shape of the main body (cover), and the like. It can be implemented with appropriate modifications.

Although the present disclosure has been described based on the embodiments, it is understood that the present disclosure is not limited to the embodiments and structures. The present disclosure includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, as well as other combinations and forms including only one element, more or less, are within the scope and spirit of the present disclosure.

Claims

The body (1),
A display unit (9) provided on the front surface of the main body (1);
A substrate (3) provided in the main body (1) and mounted with an electronic circuit for driving the display unit (9);
A heat sink (2) provided on the main body (1) and thermally connected to the substrate (3);
The heat radiating plate (2) is integrally provided with a mounting portion (5) for fixing the main body (1) to the vehicle structural material (4). In-vehicle display device attached to the vehicle.
A plurality of heat dissipating fins (6);
The in-vehicle display device according to claim 1, wherein the plurality of heat dissipating fins (6) are attached to the heat dissipating plate (2) such that attachment positions thereof can be changed.
A plurality of radiators (7);
The plurality of heat dissipating fins (6) are respectively provided on the plurality of heat dissipating bodies (7), and each of the heat dissipating bodies (7) is attached to the heat dissipating plate (2) so that the position thereof can be changed. The in-vehicle display device according to claim 2.