JP2020152140A - Display device - Google Patents

Abstract

To provide a display device which can realize thickness reduction.SOLUTION: A display device 1 of an embodiment includes: a display unit 20; a circuit board 30 which controls the display unit 20; a case 10 which has a front surface 10a and a back surface 10b opposite to the front surface 10a and houses the display unit 20 from the front surface 10a in a visible manner; a bracket 50 having a support part 51 which supports the display unit 20 in the case 10 and a fixing part 53 which has one end 54 connected to the support part 51 and the other end 55 fixed to a fixed part and protrudes from the back surface 10b; a speaker 40 which is connected to the circuit board 30 and outputs sound; and a cylindrical bracket cover 60 which has a sound emission hole 65 for emitting sound of the speaker 40 and covers the fixing part 53 protruding from the case 10. The speaker 40 is disposed at a space 70 formed between the fixing part 53 and the bracket cover 60.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a display device mounted on a vehicle or the like.

A display device mounted on a vehicle such as an automobile has a speaker that outputs a warning sound, a message to the driver, and the like. The speaker is mounted on a rigid circuit board arranged on the back surface of the display unit, for example.

Japanese Unexamined Patent Publication No. 2014-174043

Today, there is a demand for thinner display devices, and one of them is to make the display unit itself thinner. However, the circuit board on which the speaker is mounted causes the display device to swell in the thickness direction in whole or in part, reducing the commercial value of the display device.

The present disclosure has been made in consideration of such circumstances, and an object of the present disclosure is to provide a display device capable of realizing thinning.

The display device of the present disclosure has a display unit, a circuit board that controls the display unit, a front surface, and a back surface that is a surface opposite to the front surface, in order to solve the above-mentioned problems. Protruding from the back surface having a case for visually accommodating the display unit, a support portion for supporting the display unit in the case, one end connected to the support portion, and the other end fixed to the fixed portion. It has a mounting member having a fixing portion, a speaker connected to the circuit board and outputting sound, and a sound emitting hole for emitting sound of the speaker, and covers the fixing portion protruding from the case. A tubular cover is provided, and the speaker is arranged in a space formed between the fixed portion and the cover.

The display device of the present disclosure can be made thinner.

The external view of the display device as an embodiment of the display device of the present disclosure as viewed from the front side. External view of the display device as viewed from below. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. FIG. 3 is a cross-sectional view of a display device as a first modification, which corresponds to FIG. FIG. 3 is a cross-sectional view of a display device as a second modification, corresponding to FIG.

An embodiment of the display device of the present disclosure will be described with reference to the accompanying drawings. The display device of the present disclosure can be installed and mounted on a vehicle such as an automobile or a motorcycle, a ship, an agricultural machine, or a construction machine. In the following description, the installation destination of the display device is simply referred to as a "vehicle".

FIG. 1 is an external view of the display device 1 as an embodiment of the display device of the present disclosure as viewed from the front side.
FIG. 2 is an external view of the display device 1 as viewed from below.
FIG. 3 is a cross-sectional view taken along the line III-III of FIG.

In the following description, "front (front)", "rear (rear)", "top", "bottom", "right", and "left" are defined as "Fr.", "Fr." in FIGS. 1 to 5. Follow "Re.", "To.", "Bo.", "R", and "L".

The display device 1 is fixed in the dashboard 2 of the vehicle by using a screw or the like so that the display device 1 can be visually installed by the driver.

The display device 1 mainly includes a case 10, a display unit 20, a circuit board 30, a speaker 40, a bracket 50, and a bracket cover 60.

The case 10 houses the display unit 20, the circuit board 30, and the like, and protects them from external shocks, dust, and the like. The case 10 is made of a resin such as black (for example, polypropylene). The case 10 has an opening 11 and a bracket hole 12. The opening 11 makes the display screen 21 of the display unit 20 visible from the front surface 10a side. The bracket hole 12 is provided on the back surface 10b side of the case 10 below, for example, the center in the vertical direction, and the bracket 50 is projected from the inside to the outside of the case 10.

The opening 11 is covered with a protective cover 15. The protective cover 15 is a translucent plate-like member (for example, inorganic glass, polycarbonate resin, or polymethyl methacrylate resin (PMMA)). The protective cover 15 protects the display unit 20 and the circuit board 30 inside the case 10 from dust and the like by being fixed to the case 10 via the adhesive 14. The protective cover 15 has a black print 16 on the outer edge side. The black print 16 shields an unnecessary internal structure from the user, and at the same time, partitions the display screen 21 of the display unit 20 by the inner edge 16a. The protective cover 15 is adhered to the front surface 20a of the display unit 20 by the translucent adhesive 18 by the opticarboning. The translucent adhesive 18 is a transparent resin material (for example, silicone-based, urethane-based, or acrylic-based resin) having a refractive index substantially equal to that of the protective cover 15. The translucent adhesive 18 may be omitted if it is not necessary for the performance of the display device 1.

The display unit 20 (display unit) includes a display panel and a backlight unit.

The display panel is, for example, a TFT (Thin Film Transistor) type normally black type (black display when no voltage is applied) liquid crystal display panel. The display panel has a pair of surface glass substrates that enclose the liquid crystal layer. A transparent electrode is formed on the pair of glass substrates by ITO (Indium Tin Oxide) or the like. Further, the display panel has a pair of surface polarizing plates (polarizing filters) arranged so as to sandwich the pair of surface glass substrates. The display panel is connected to the circuit board 30 via a flexible printed circuit board (FPC (Flexible Printed Circuits)) (not shown). The display panel is controlled by the control unit of the circuit board 30, so that a driving voltage is applied to the liquid crystal layer via the transparent electrode. As a result, the orientation of the liquid crystal molecules in the liquid crystal layer is controlled, and the transmittance of each pixel of the display panel changes, so that the display panel displays an image.

The backlight unit is provided on the back side of the display panel. The backlight unit includes a light source substrate and a light guide body, and illuminates the display panel from the back side. A plurality of LEDs (Light Emitting Diodes), which are an example of a light source, are mounted on the light source substrate. The light source substrate is connected to the circuit board 30 via a flexible substrate 31 such as an FPC. When the drive current is supplied, the LED emits light toward the light guide body. The light guide guides the light emitted by the LED toward the display panel. The light guide is a transparent resin (for example, PMMA) formed in a flat plate shape.

Further, the display unit 20 has a support screwing structure 25 for connecting to the bracket 50. The screw fixing structure 25 for the support portion is a tubular member having a screw hole for tightening the screw 26 and projecting from the back surface 20b.

The circuit board 30 mainly has a control unit for controlling the display unit 20 and the speaker 40. The control unit has a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes a predetermined arithmetic process according to a program written in the ROM, for example. The control unit acquires, for example, vehicle speed, engine speed, various vehicle information, navigation information, etc. from the vehicle's ECU (Electronic Control Unit) via various sensors and the like. Based on the acquired information, the control unit causes the display unit 20 to display the information and outputs sound from the speaker 40.

The circuit board 30 is arranged on the back surface 20b side of the display unit 20 and parallel to the back surface 20b of the display unit 20. The circuit board 30 is fixed to the display unit 20 by being screwed together with the bracket 50 in the support screwing structure 25.

The speaker 40 outputs sound in order to aurally notify various vehicle information. The vehicle information is, for example, warning information indicating that the seatbelt is not fastened, information on the operation of the blinker, car navigation information, and the like. The speaker 40 notifies such information by sound effects and voice. One surface of the speaker 40 is the output surface 41, and the surface facing the output surface 41 is the back surface 45. The output surface 41 has, for example, an output region 42 provided with an output hole, and an outer edge region 43 located on the outer edge side of the output region 42 and being a region other than the output region 42.

The speaker 40 is fixed to the bracket 50 away from the circuit board 30 in a state of being connected to the circuit board 30 by the cable 47. The mounting structure of the speaker 40 will be described later.

The bracket 50 (mounting member) mounts the display device 1 in the dashboard 2 of the vehicle, which is an example of the fixed portion. The bracket 50 is made of a metal material (for example, aluminum, magnesium, etc.). The bracket 50 has a support portion 51 and a fixing portion 53.

The support portion 51 is a plate-shaped member arranged on the back surface 30b side of the circuit board 30 in parallel with the back surface 30b of the circuit board 30. The support portion 51 is firmly fixed to the display unit 20 by being screwed by the screw 26 in the support portion screwing structure 25 of the display unit 20. As a result, the support portion 51 supports the display unit 20 in the case 10.

The fixed portion 53 extends in the direction of the axis 59 (a direction slightly inclined downward with respect to the normal direction of the support portion 51) along the extending direction of the fixed portion 53. The fixing portion 53 is a rod-shaped member having a rectangular cross section and whose surface facing in the vertical direction corresponds to a long side of the rectangular cross section. The fixing portion 53 has a support portion side end portion 54 and a vehicle side end portion 55. The support portion side end portion 54 (one end) is fixed to the back surface 51b of the support portion 51 and connected to the support portion 51. In the support portion side end portion 54, the fixing portion 53 is inclined with respect to the support portion 51 so that the shaft 59 extends downward toward the vehicle side end portion 55, and the support portion 51 and the fixing portion are viewed in the vertical cross-sectional view. 53 forms an acute angle. The vehicle side end portion 55 is fixed in the dashboard 2 by using a screw or the like. The fixing portion 53 penetrates the bracket hole 12 of the case 10 and projects from the back surface 10b of the case 10. The fixing portion 53 has a speaker screwing structure 56 for attaching the speaker 40 to the fixing portion 53. The speaker screwing structure 56 is a tubular member having a screw hole for tightening the screw 57 and projecting substantially downward from the outer surface 53a of the fixing portion 53.

The bracket cover 60 (cover) covers the outer surface 53a of the fixing portion 53 (mounting member) and extends in the direction of the shaft 59. The bracket cover 60 is a tubular cover having an elliptical cross section. Both the fixing portion 53 and the bracket cover 60 are inclined with respect to the back surface 10b of the case 10 so that the shaft 59 extends downward. The bracket cover 60 is made of a resin such as black (for example, polypropylene). The bracket cover 60 is attached to the fixing portion 53 by combining the upper cover 61 and the lower cover 62. The upper cover 61 and the lower cover 62 are divided by, for example, a surface orthogonal to a surface orthogonal to the axis 59 and a surface including the axis 59. The lower cover 62 has a sound emitting hole 65 that emits the sound of the speaker 40. As shown in FIG. 2, the sound emitting holes 65 are a plurality of slits and are formed corresponding to the output region 42 of the speaker 40. The sound emitting hole 65 is preferably provided in a portion of the lower cover 62 that faces downward, that is, a portion that appears as a cross section in the vertical sectional view of FIG. Further, the sound emitting hole 65 is preferably provided at a position facing the back surface 10b of the case 10 because the driver does not want to see the sound emitting hole 65. The shape of the sound emitting hole 65 is not limited to the slit, and may be another shape such as one or a plurality of circular holes.

Next, the mounting structure of the speaker 40 will be described in detail.

The speaker 40 is arranged in a space 70 formed between the fixing portion 53 and the bracket cover 60 with the output surface 41 facing substantially downward and the back surface 45 facing substantially upward. Specifically, the speaker 40 is fixed to the fixing portion 53 by screws 57 with respect to the speaker screwing structure 56 of the fixing portion 53. The back surface 45 faces the outer surface 53a of the fixing portion 53. The output region 42 of the output surface 41 is exposed to the outside of the lower cover 62 from the sound emitting hole 65 of the lower cover 62. The lower cover 62 has a rising portion 67 rising in the internal direction of the bracket cover 60 at the outer edge of the sound emitting hole 65. The rising portion 67 is in close contact with the output surface 41 via the packing 66 in the outer edge region 43 of the output surface 41 of the speaker 40. The lower cover 62 isolates the output area 42 from the inside of the bracket cover 60. As a result, the sound output from the output area 42 is efficiently transmitted to the vehicle space on the driver's side.

Further, the output area 42 of the speaker 40 and the back surface 45 are separated by the bracket cover 60. Therefore, the space sealed by the bracket cover 60, the case 10 and the protective cover 15 acts as a back cavity of the speaker 40. Therefore, the display device 1 can secure the required sound pressure of the speaker 40 without impairing the commercial value.

In such a display device 1, the thickness of the case 10 in the front-rear direction can be reduced. That is, the speaker 40 was attached to the bracket 50. As a result, the thickness of the case 10 in the front-rear direction is determined by the display unit 20, the circuit board 30, and the fixing portion 53, and can be made thinner than when the speaker 40 is mounted on the surface of the circuit board 30.

Further, the display device 1 is provided with a sound emitting hole 65 below the lower cover 62 so that the output surface 41 of the speaker 40 faces downward. That is, when the bracket cover 60 is divided into two regions, upper and lower, on a plane orthogonal to the plane orthogonal to the axis 59 of the fixing portion 53 and including the shaft 59, the sound emitting hole 65 is divided into a lower region ( It is provided on the lower cover 62). Further, since the bracket cover 60 is inclined downward, the lower region is hidden on the back surface 10b side of the case 10. Therefore, the sound emitting hole 65 is difficult to enter into the user's field of view, giving the user a seamless feeling, and as a result, the commercial value of the display device 1 can be improved.

Although some embodiments have been described in the present disclosure, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, although the example in which the sound emitting hole 65 is provided on the lower cover 62 has been described, it may be provided on the upper cover 61 side. Further, in the bracket cover 60, the divided positions of the upper cover 61 and the lower cover 62 are orthogonal to the surface orthogonal to the axis 59 along the extending direction of the fixing portion 53, and are different positions not limited to the surface including the axis 59. You may. The bracket cover 60 may be divided into three or more parts.

Further, FIG. 4 is a cross-sectional view of the display device 1a as the first modification, which corresponds to FIG. In the display device of the present disclosure, the circuit board 30 may be arranged in the space 70 formed between the fixing portion 53 and the bracket cover 60 as in the display device 1a. As a result, the display device 1a can reduce the thickness of the circuit board 30 from the thickness of the case 10 in the front-rear direction, and can be made thinner. In this case, the screwing structure 25 for the support portion of the display unit 20 may be omitted, and the front surface 51a of the support portion 51 may be directly fixed to the back surface 20b of the display unit 20 with double-sided tape, an adhesive, or the like. As a result, the display device 1a can further reduce the thickness of the case 10 in the front-rear direction.

Further, the display device 1a of FIG. 4 may be further deformed, the circuit board 30 may be fixed below the fixing portion 53, and the mounting type speaker may be arranged on the circuit board 30. The configuration of the bracket cover 60 including the sound emitting hole 65 in this case is substantially the same as that of the display device 1a.

Further, FIG. 5 is a cross-sectional view of the display device 1b as a second modification, which corresponds to FIG. In the display device 1 of the present disclosure, as in the display device 1b, a speaker screwing structure 69 may be provided on the bracket cover 60, and the speaker 40 may be attached to the bracket cover 60.

1, 1a, 1b Display device 2 Dashboard 10 Case 10b Back 11 Opening 12 Bracket hole 15 Protective cover 16 Black printing 16a Inner edge 18 Translucent adhesive 20 Display unit 20a Front 20b Back 21 Display screen 25 Support screwing Structure 26 Screw 30 Circuit board 30b Back side 31 Flexible board 40 Speaker 41 Output surface 42 Output area 43 Outer edge area 45 Back side 47 Cable 50 Bracket 51 Support part 51b Back side 53 Fixed part 53a Outer surface 54 Support part side end 55 Vehicle side End 56 Screw structure for speaker 57 Screw 59 Shaft 60 Bracket cover 61 Top cover 62 Bottom cover 65 Sound release hole 66 Packing 67 Rising part 70 Space

Claims (5)

Display and
The circuit board that controls the display unit and
A case having a front surface and a back surface opposite to the front surface, and visibly accommodating the display unit from the front surface.
A mounting member having a support portion that supports the display portion in the case, a fixing portion that projects from the back surface and has one end that connects to the support portion and the other end that is fixed to the fixed portion.
A speaker that is connected to the circuit board and outputs sound,
A tubular cover having a sound emitting hole for emitting the sound of the speaker and covering the fixed portion protruding from the case is provided.
The speaker is a display device arranged in a space formed between the fixed portion and the cover. When the cover is orthogonal to a surface orthogonal to an axis along the extending direction of the fixing portion and the surface including the axis is divided into two regions, upper and lower when the display device is installed, the cover is divided into two regions. The display device according to claim 1, further comprising the sound emitting hole in the lower region. The display device according to claim 2, wherein the fixing portion and the cover are inclined with respect to the back surface so that the shaft extends downward. The speaker has an output surface having an output area provided with an output hole for outputting sound, an outer edge area other than the output area located on the outer edge side of the output area, and a back surface facing the output surface. ,
The display device according to claim 1, wherein the cover is in close contact with the output surface at the outer edge region and isolates the output region from the inside of the cover. The display device according to claim 1, wherein the circuit board is arranged in the case or in a space formed between the fixing portion and the cover.

Images