JP2021005043A - Display device, electronic device, and assembly method - Google Patents

Abstract

To reduce surface brightness irregularity.SOLUTION: A display device provided herein comprises: a substrate 6 having light sources 61 provided thereon; a display board 7 disposed facing the substrate 6; a cylindrical panel 8 designed to surround and hold the substrate 6 and the display board 7; and a lens 9 disposed between the substrate 6 and the display board 7 and configured to guide light emitted by the light sources 61. The panel 8 has ribs 82 protruding from an inner peripheral surface thereof. The lens 9 has formed thereon fitting grooves 95 designed to allow the ribs 82 to move thereinto when the lens 9 is being attached to the panel 8, and claws 93 and claws 94 located adjacent to the fitting grooves 95, where the claws 93 and claws 94 are designed to be positioned between the ribs 82 and the display board 7 when the lens is attached to the panel.SELECTED DRAWING: Figure 3

Description

The present invention relates to display devices, electronic devices and assembly methods.

Vehicle switch devices that operate various in-vehicle devices by touch operation are known (see, for example, Patent Document 1). The techniques described in Patent Document 1 include a light source, a display area in which the emitted light emitted from the light source is transmitted and displayed, a touch switch unit, a touch detection unit, and a light source control unit that changes the amount of emitted light. And.

Japanese Unexamined Patent Publication No. 2016-10775

In a display device including a switch device having a display area, a light source is arranged on the back surface side of the display board on which the display area is arranged, and the display area on the front surface is displayed. Therefore, it is desired to reduce the unevenness of the brightness of the surface.

The present invention has been made in view of the above, and an object of the present invention is to provide a display device, an electronic device, and an assembling method capable of reducing unevenness in surface brightness.

In order to solve the above-mentioned problems and achieve the object, the display device according to the present invention includes a substrate on which a light source is arranged, a display board arranged so as to face the substrate, and around the substrate and the display plate. A tubular panel that surrounds and holds the surroundings of the light source, and a lens that is arranged between the substrate and the display board and guides the light emitted by the light source, and the panel is provided with an inner peripheral surface. The lens has a rib protruding from the lens, and a fitting groove is formed so that the rib can enter when the lens is assembled to the panel, and the lens has a claw portion arranged adjacent to the fitting groove. However, the claw portion is located between the rib and the display board in the assembled state.

Further, in order to solve the above-mentioned problems and achieve the object, the electronic device according to the present invention has a display panel having a front display surface, a front panel surrounding the display panel, and adjacent to the front panel. It is provided with the above display device.

Further, in order to solve the above-mentioned problems and achieve the object, the assembly method according to the present invention includes a substrate on which a light source is arranged, a display board arranged so as to face the substrate, and around the substrate and the above. A tubular panel that surrounds and holds the periphery of the display plate, and a lens that is arranged between the substrate and the display plate and guides the light emitted by the light source are provided. The lens has a rib protruding from the peripheral surface, and the lens has a fitting groove formed into which the rib can enter when the lens is assembled to the panel, and a claw portion arranged adjacent to the fitting groove. The claw portion is a method of assembling the display device, which is located between the rib and the display plate in the assembled state, and pushes the rib onto the claw portion from the rear side of the panel. The rib is pushed into the fitting groove while elastically deforming the claw portion, and the lens is pushed further forward with the rib entering the fitting groove to push the display plate further forward. The substrate is assembled to the panel from the front side, and the substrate is assembled to the rear part of the panel to which the display plate and the lens are assembled, with the claw portion positioned between the rib and the display plate.

The display device, the electronic device, and the assembling method according to the present invention have an effect that unevenness in the brightness of the surface can be reduced.

FIG. 1 is a front view showing an electronic device according to the first embodiment. FIG. 2 is an exploded perspective view of the display device according to the first embodiment. FIG. 3 is a cross-sectional view of the display device according to the first embodiment. FIG. 4 is a perspective view of the panel shown in FIG. FIG. 5 is a perspective view of the lens shown in FIG. FIG. 6 is a partially enlarged view of the lens. FIG. 7 is a partially enlarged view of the lens and the rib. FIG. 8 is a perspective view showing an assembling procedure of the display device according to the first embodiment. FIG. 9 is a partially enlarged view of another example of the display device according to the first embodiment. FIG. 10 is a partially enlarged view of another example of the display device according to the first embodiment. FIG. 11 is a partially enlarged view of another example of the display device according to the first embodiment. FIG. 12 is a perspective view of another example of the lens shown in FIG. FIG. 13 is a perspective view of a conventional lens. FIG. 14 is a cross-sectional view of a conventional display device.

Hereinafter, embodiments of the display device, electronic device, and assembly method according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that can be easily conceived by those skilled in the art, or those that are substantially the same.

[First Embodiment]
<Electronic equipment>
FIG. 1 is a front view showing an electronic device 1 according to the first embodiment. As shown in FIG. 1, the electronic device 1 according to the present embodiment is, for example, an AV (Audio Visual) integrated car navigation device mounted inside a vehicle. The electronic device 1 has a display panel 2, a front panel 3, and a display device 5.

In the following description, the upper side of the electronic device 1 in normal use will be referred to as the upper side of the electronic device 1, and the lower side of the electronic device 1 in normal use will be referred to as the lower side of the electronic device 1. Further, in the following description, the left-right direction when the electronic device 1 is viewed from the front panel 3 side will be described as the left-right direction of the electronic device 1.

The display panel 2 is formed in a rectangular shape and has a display surface 2a on the front surface. The front is a surface that is visible to the occupants of the vehicle. In the case of a car navigation device, the front surface is a surface facing the rear inside the vehicle. The display surface 2a is formed in a rectangular shape smaller than the rectangular shape of the display panel 2. The display surface 2a is arranged inside the outer edge 21 of the display panel 2. In the present embodiment, the display surface 2a of the display panel 2 is a touch panel.

The front panel 3 is formed in a rectangular shape so as to surround the display panel 2. The front panel 3 has a rectangular frame portion 31 that surrounds the display panel 2, and a rectangular window portion 32 that opens the display surface 2a of the display panel 2 inside the frame portion 31.

<Display device>
FIG. 2 is an exploded perspective view of the display device 5 according to the first embodiment. FIG. 3 is a cross-sectional view of the display device 5 according to the first embodiment. As shown in FIG. 1, the display device 5 is arranged adjacent to the peripheral edge of the front panel 3. In this embodiment, the display device 5 is arranged below the front panel 3. In the present embodiment, the display device 5 has a rectangular shape that is long in the left-right direction in the front-back direction view. The display device 5 includes a substrate 6, a display board 7, a panel 8, and a lens 9.

The substrate 6 is arranged along the display surface 2a of the display panel 2. In the present embodiment, the substrate 6 has a rectangular shape that is long in the left-right direction. A light source 61 is arranged on the surface 6a of the substrate 6. The light source 61 emits light toward the front side. The light source 61 is, for example, an LED (Light Emitting Diode). In the present embodiment, five light sources 61 are arranged side by side in the left-right direction.

The display board 7 is arranged along the display surface 2a of the display panel 2. The display board 7 is arranged on the front side of the substrate 6 and is arranged so as to face the substrate 6. In the present embodiment, the display board 7 has a rectangular shape when viewed in the front-rear direction. The display plate 7 is formed in a plate shape, and is arranged so as to close the front side of the panel 8 in which the substrate 6, the display plate 7, and the lens 9 are housed. The display board 7 has a dark color such as black or gray.

On the surface 7a of the display board 7, a display unit 71 for displaying characters, numbers, figures, and symbols such as a logo or a mark visible to the occupants of the vehicle is arranged. In the present embodiment, five display units 71 are arranged side by side in the left-right direction on the display board 7.

The display unit 71 has a transmission unit 72 formed on the surface 7a of the display plate 7. The transmitting portion 72 transmits the light emitted from the light source 61. In the transmitting portion 72, for example, shapes such as letters, numbers, figures, and symbols having a light color capable of transmitting light such as white and translucent are arranged. In the present embodiment, the transparent portion 72 is arranged with the character shapes of “AAA”, “BBB”, “CCC”, “DDD”, and “EEE” in order from the left side.

<Panel>
FIG. 4 is a perspective view of the panel 8 shown in FIG. As shown in FIG. 4, the panel 8 surrounds and holds the outer edge 73 and the lens 9 around the substrate 6 and the display board 7. The panel 8 is formed in a tubular shape that surrounds the periphery of the substrate 6, the outer edge 73 of the display plate 7, and the periphery of the lens 9. In this embodiment, the panel 8 is formed in a square cylinder shape.

The panel 8 is provided with a holding portion 81 that holds the outer edge of the base portion 91 of the lens 9 on the inner peripheral surface. The holding portion 81 projects from the inner peripheral surface of the panel 8. The holding portion 81 is formed in a rectangular frame shape having an opening smaller than the outer edge of the base 91 of the lens 9. The holding portion 81 positions the lens 9 in the front-rear direction in the panel 8.

The panel 8 has ribs 82 protruding from the inner peripheral surface. The rib 82 is integrally formed with the holding portion 81. The panel 8 has ribs 82 that are spaced apart from each other in the left-right direction. The rib 82 regulates the bending of the panel 8 due to heat generation of the display panel 2 or an impact applied from the outside. The ribs 82 connect the facing surfaces of the inner peripheral surfaces of the panel 8 and extend in the vertical direction. The rib 82 partitions the opening of the holding portion 81. In this embodiment, four ribs 82 are arranged. In the present embodiment, the rib 82 has a square cross section orthogonal to the central axis.

<Lens>
FIG. 5 is a perspective view of the lens 9 shown in FIG. FIG. 6 is a partially enlarged view of the lens 9. FIG. 7 is a partially enlarged view of the lens 9 and the rib 82. As shown in FIG. 1, the lens 9 is arranged along the display surface 2a of the display panel 2. As shown in FIG. 3, the lens 9 is arranged on the front side of the substrate 6 and on the rear side of the display plate 7. In other words, the lens 9 is arranged so as to be sandwiched between the substrate 6 and the display plate 7. The lens 9 is arranged so as to face the substrate 6 and the display plate 7. The lens 9 is an optical member that guides the light emitted from the light source 61. The lens 9 is, for example, a light guide lens. The lens 9 is made of a milky white resin material.

More specifically, the lens 9 includes a base 91, a plurality of convex portions 92 projecting from the base 91 to the front side, and a claw portion 93 projecting from the left side to the left side of the front end portion of the convex portion 92. It has a claw portion 94 projecting from the right side to the right side of the front end portion of the convex portion 92. The claw portion 93 and the claw portion 94 are arranged so as to face each other. In the lens 9, a fitting groove 95 is formed between the adjacent convex portions 92, in other words, between the claw portions 93 and the claw portions 94 facing each other. The base portion 91, the convex portion 92, the claw portion 93, and the claw portion 94 are integrally formed.

The plurality of convex portions 92 are connected in the left-right direction by the base portion 91. In this embodiment, five convex portions 92 are arranged. As shown in FIG. 6, the convex portion 92 has a concave concave portion on the rear surface side. As shown in FIG. 3, in the assembled state, the front surface 92a of the convex portion 92 comes into contact with the back surface 7b of the display plate 7. In the assembled state, the convex portion 92 is located at the window portion 83 surrounded by the holding portion 81 and the rib 82.

The claw portion 93 and the claw portion 94 are arranged adjacent to the fitting groove 95. The claw portion 93 and the claw portion 94 are formed so as to project to the entrance / exit of the fitting groove 95. The claw portion 93 and the claw portion 94 are formed of, for example, an elastically deformable material containing polycarbonate. When assembling the lens 9, the claw portion 93 and the claw portion 94 are pressed against the rib 82, and the rib 82 is made to enter the fitting groove 95 while elastically deforming the claw portion 93 and the claw portion 94. When the rib 82 enters the fitting groove 95, the claw portion 93 and the claw portion 94 return to their original shapes.

In the assembled state, the claw portion 93 and the claw portion 94 are located between the rib 82 and the display plate 7. In the assembled state, the claw portion 93 and the claw portion 94 are located on the front side of the rib 82 and on the back surface 7b side of the display plate 7. In the assembled state, the shortest distance between the claw portion 93 and the claw portion 94 is smaller than the width of the fitting groove 95.

At the entrance and exit of the fitting groove 95, the surface 93a of the claw portion 93 and the surface 94a of the claw portion 94 have a tapered shape.

The rib 82 can enter the fitting groove 95 when the lens 9 is assembled to the panel 8 when the display device 5 is assembled. In the assembled state, the rib 82 is located in the fitting groove 95. When assembling the lens 9, the lens 9 is assembled to the panel 8 from the rear side by pushing the lens 9 toward the front side with the rib 82 positioned in the fitting groove 95.

In the assembled state, the space of the fitting groove 95 in which the rib 82 is located is about the same size as the outer circumference of the rib 82. Further, the claw portion 93 and the claw portion 94 project from the entrance / exit of the fitting groove 95, and the shortest distance between the claw portion 93 and the claw portion 94 is smaller than the width of the fitting groove 95. Further, at the entrance / exit of the fitting groove 95, the surface 93a of the claw portion 93 and the surface 94a of the claw portion 94 have a tapered shape. As a result, after the rib 82 enters the fitting groove 95, it is restricted from sliding inside the fitting groove 95. After the rib 82 has entered the fitting groove 95, the rib 82 is prevented from coming out of the fitting groove 95.

The thickness of each part of the lens 9 will be described with reference to FIG. Let the thickness of the claw portion 93 and the claw portion 94 be d1. The thickness d1 of the claw portion 93 and the claw portion 94 is a display plate 7 in which the claw portion 93 and the claw portion 94 guide the light emitted from the light source 61 and are in contact with the claw portion 93 and the claw portion 94. Is thick enough to have a predetermined brightness. The thickness d2 of the convex portion 92 and the thickness d3 of the base 91 are the thicknesses of the claw portion 93 and the claw portion 94 so that the unevenness of the brightness of the surface 7a of the display plate 7 is reduced and the brightness becomes uniform. It is preferable that the thickness is the same as that of d1. The lens 9 preferably has a uniform thickness.

<How to assemble electronic devices>
Next, the method and operation of assembling the electronic device 1 will be described with reference to FIG. FIG. 8 is a perspective view showing an assembling procedure of the display device 5 according to the first embodiment.

As shown in FIG. 8A, the lens 9 is assembled from the rear side of the panel 8. The claws 93 and 94 of the lens 9 are pressed against the ribs 82 of the panel 8, and the ribs 82 of the panel 8 are elastically deformed into the fitting grooves 95 of the lens 9 while elastically deforming the claws 93 and 94 of the lens 9. To enter. The claw portion 93 and the claw portion 94 of the lens 9 are deformed when the rib 82 enters the fitting groove 95 due to elastic deformation, and returns to the original shape when the rib 82 enters the fitting groove 95. The lens 9 is pushed forward in the first direction indicated by the arrow until the rear surface 82b of the rib 82 abuts on the surface 91a of the base 91.

As shown in FIG. 8B, when the rear surface 82b of the rib 82 is in contact with the surface 91a of the base 91, the convex portion 92 is located at the window portion 83 surrounded by the holding portion 81 and the rib 82. doing. In this way, the lens 9 is assembled to the panel 8.

Then, the display plate 7 is assembled from the front side to the panel 8 to which the lens 9 is assembled. With the display plate 7 assembled to the panel 8, the front surface 92a, the claw portion 93, and the claw portion 94 of the convex portion 92 of the lens 9 come into contact with the back surface 7b of the display plate 7.

Then, the substrate 6 is assembled to the rear portion of the panel 8 to which the display board 7 and the lens 9 are assembled. The display device 5 assembled in this way is assembled under the electronic device 1.

<Action of electronic devices>
In the display device 5 arranged below the electronic device 1, the electronic device 1 is activated while the vehicle is being started, and the light source 61 arranged on the substrate 6 emits light toward the front. The light emitted from the light source 61 enters the lens 9 from the rear side. The light incident on the lens 9 is guided by the lens 9 and emitted to the outside from the peripheral surface of the lens 9. Light emitted from the surface 91a of the base 91 of the lens 9, the surface 92a of the convex portion 92, the surface 93a of the claw portion 93, and the surface 94a of the claw portion 94 is incident on the display plate 7 from the back surface 7b. On the surface 7a of the display plate 7, the portions that are in contact with the surface 92a, the claw portion 93, and the claw portion 94 of the convex portion 92 are the surface 92a of the convex portion 92, the surface 93a of the claw portion 93, and the claw portion 94. It is brightened by the light emitted from the surface 94a. The claw portion 93 and the claw portion 94 guide the light incident on the lens 9 to brighten the display plate 7 located on the front side of the rib 82. The light blocked by the rib 82 without the claw portion 93 and the claw portion 94 is supplemented by the claw portion 93 and the claw portion 94, and uneven brightness of the display plate 7 is reduced. In this way, the uneven brightness of the surface 7a of the display board 7 is reduced. The transmissive portion 72 of the display board 7 transmits light through the arranged characters, numbers, figures, symbols, and the like. As a result, shapes such as letters, numbers, figures, and symbols are brightly displayed on the transparent portion 72 of the display board 7.

<Effect>
As described above, in the present embodiment, the display device 5 arranged under the electronic device 1 includes a substrate 6, a display board 7, a lens 9, and a panel 8 that surrounds and holds the lens 9. Further, in the present embodiment, the lens 9 is formed with a fitting groove 95 into which the rib 82 protruding from the inner peripheral surface of the panel 8 can enter. Further, in the present embodiment, the claw portion 93 and the claw portion 94 arranged adjacent to the fitting groove 95 are located between the rib 82 and the display plate 7 in the assembled state. As a result, according to the present embodiment, on the surface 7a of the display plate 7, the portions of the convex portion 92 in contact with the surface 92a, the claw portion 93, and the claw portion 94 are brightened by the light emitted from the lens 9. can do. According to the present embodiment, the claw portion 93 and the claw portion 94 can guide the light incident on the lens 9 to brighten the display plate 7 located on the front side of the rib 82. In the present embodiment, the light blocked by the rib 82 is supplemented by the claw portion 93 and the claw portion 94, and the unevenness of the brightness of the display plate 7 can be reduced. In the present embodiment, it is possible to eliminate a portion of the surface 7a of the display plate 7 where the light emitted from the lens 9 is blocked by the rib 82. In this way, according to the present embodiment, it is possible to reduce unevenness in brightness and make the brightness uniform on the surface 7a of the display board 7. In the present embodiment, the transmissive portion 72 of the display board 7 transmits light through the arranged shapes of characters, numbers, figures, symbols, etc., and displays the shapes of the arranged characters, numbers, figures, symbols, etc. evenly and brightly. can do.

Here, the conventional display device 5X will be described for comparison with reference to FIGS. 13 and 14. FIG. 13 is a perspective view of the conventional lens 9X. FIG. 14 is a cross-sectional view of the conventional display device 5X. The conventional display device 5X differs from the display device 5 in that the lens 9X does not have a claw portion. In the display device 5X, since the claw portion is not arranged on the front side of the rib 82, the brightness of the display plate 7 located on the front side of the rib 82 is reduced as compared with the surroundings. In the display device 5X, there is a portion on the surface 7a of the display plate 7 where the light emitted from the lens 9 is blocked by the rib 82 and becomes darker than the surroundings.

<Modified example of the first embodiment>
FIG. 9 is a partially enlarged view of another example of the display device 5 according to the first embodiment. FIG. 10 is a partially enlarged view of another example of the display device 5 according to the first embodiment. FIG. 11 is a partially enlarged view of another example of the display device 5 according to the first embodiment. In the following description, the same components as those of the display device 5 are designated by the same reference numerals or corresponding reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 9, the rib 82A has a cross section including an inclined surface with respect to the optical axis of the central ray of the light source 61. The rib 82A has a triangular cross section orthogonal to the central axis. The peripheral surface 82Aa and the peripheral surface 82Ab of the rib 82A are arranged so as to intersect the optical axis of the light source 61. The peripheral surface 82Ac of the rib 82A is arranged along the display surface 2a of the display panel 2. As a result, it is possible to facilitate the rib 82A from entering the fitting groove 95 at the time of assembly. Further, after the rib 82A enters the fitting groove 95, it is possible to prevent the rib 82A from coming out of the fitting groove 95.

As shown in FIG. 10, the rib 82B has a rectangular cross section. The rib 82B has a diamond-shaped cross section orthogonal to the central axis. All peripheral surfaces of the rib 82B are arranged so as to intersect the optical axis of the light source 61. As a result, the area where the rib 82B and the claw portion 93 and the claw portion 94 face each other is reduced. As a result, it is possible to prevent the light emitted from the lens 9 toward the display plate 7 from being blocked by the rib 82B. In addition, the rib 82B can be easily inserted into the fitting groove 95 at the time of assembly.

As shown in FIG. 11, the rib 82C has an arc-shaped cross section at least a part of its peripheral surface. The rib 82C has a circular cross section orthogonal to the central axis. A space is formed between the peripheral surface of the rib 82C and the fitting groove 95. As a result, it is possible to prevent the light emitted from the lens 9 toward the display plate 7 from being blocked by the rib 82C. Further, at the time of assembly, the rib 82C can be easily inserted into the fitting groove 95.

Another example of the lens shown in FIG. 2 will be described with reference to FIG. FIG. 12 is a perspective view of another example of the lens shown in FIG. In the above, the lens 9 has been described as having the claw portion 93 and the claw portion 94, but the lens 9 may have either the claw portion 93 or the claw portion 94. The lens 9D shown in FIG. 12 has only the claw portion 93D. The claw portion 93D may have a length that protrudes from the front end portion of the convex portion 92D. As a result, the claw portion 93D is easily deformed when the lens 9D is assembled, so that the lens 9D can be easily assembled.

The above-mentioned components include those that can be easily assumed by those skilled in the art and those that are substantially the same. Further, the above configurations can be combined as appropriate. Further, various omissions, substitutions or changes of the configuration can be made without departing from the gist of the present invention.

Although described above as a display device, the present invention is not limited to this. For example, it may be a display device that brightly displays characters, numbers, figures, symbols, etc., which has a function as a switch.

1 Electronic equipment 2 Display panel 3 Front panel 5 Display device 6 Board 61 Light source 7 Display board 71 Display 72 Transmissive part 8 Panel 81 Holding part 82 Rib 9 Lens 91 Base 92 Convex part 93 Claw part 94 Claw part 95 Fitting groove

Claims (7)

The board on which the light source is placed and
A display board arranged to face the substrate and
A tubular panel that surrounds and holds around the substrate and around the display board,
A lens arranged between the substrate and the display board to guide the light emitted by the light source, and
With
The panel has ribs protruding from the inner peripheral surface and has ribs.
The lens has a fitting groove formed into which the rib can enter when the lens is assembled to the panel, and has a claw portion arranged adjacent to the fitting groove.
The claw portion is located between the rib and the display plate in the assembled state.
Display device. The display device according to claim 1, wherein the claw portion is formed of an elastically deformable material and is arranged so as to project into the fitting groove. The display device according to claim 1 or 2, wherein the rib has a rectangular cross section. The display device according to claim 1 or 2, wherein the rib has a cross section including an inclined surface with respect to the optical axis of the central ray of the light source. The display device according to claim 1 or 2, wherein the rib has an arcuate cross section at least a part of its peripheral surface. A display panel with a display surface on the front and
The front panel that surrounds the display panel and
The display device according to any one of claims 1 to 5, which is adjacent to the front panel.
An electronic device characterized by being equipped with. The board on which the light source is placed and
A display board arranged to face the substrate and
A tubular panel that surrounds and holds around the substrate and around the display board,
A lens arranged between the substrate and the display board to guide the light emitted by the light source, and
With
The panel has ribs protruding from the inner peripheral surface, and the lens is formed with a fitting groove through which the rib can enter when the lens is assembled to the panel, and is adjacent to the fitting groove. A method of assembling a display device, which has an arranged claw portion and is located between the rib and the display plate in the assembled state.
From the rear side of the panel, the rib is pressed against the claw portion to elastically deform the claw portion, and the rib is made to enter the fitting groove.
With the ribs in the fitting groove, the lens is pushed further forward.
Assemble the display board to the panel from the front side,
With the claws positioned between the ribs and the display plate, the substrate is assembled to the rear portion of the panel to which the display plate and the lens are assembled.
Assembling method.

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