JP2021005038A - Display device, electronic device - Google Patents

Abstract

To reduce surface brightness irregularity.SOLUTION: A display device provided herein comprises: a substrate having light sources provided thereon; a display board disposed facing the substrate; a cylindrical panel 8 designed to surround and hold the substrate and the display board; and a lens disposed between the substrate and the display board and configured to guide light emitted by the light sources. The panel 8 comprises a cylindrical main body 81 and ribs 84 protruding from an inner peripheral surface of the main body 81. The lens has formed thereon slide grooves designed to allow the ribs 84 to move back and forth therein when the lens is being attached to the panel 8. The ribs 84 transmit and guide the light emitted by the light sources toward the display board.SELECTED DRAWING: Figure 4

Description

The present invention relates to display devices and electronic devices.

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 and an electronic device 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 plate and guides the light emitted by the light source, and the panel has a tubular shape. The lens has a main body and ribs arranged so as to project from the inner peripheral surface of the main body, and the lens is formed with a slide groove through which the ribs can move forward and backward when the lens is assembled to the panel. The rib transmits the light emitted by the light source and guides the light toward the display plate.

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.

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

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

Hereinafter, embodiments of the display device and the electronic device 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.

[Embodiment]
<Electronic equipment>
FIG. 1 is a front view showing an electronic device 1 according to an 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 embodiment. FIG. 3 is a cross-sectional view of the display device 5 according to the 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. 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. FIG. 5 is a partially enlarged view of the panel 8 shown in FIG. FIG. 6 is a perspective view of the panel 8 shown in FIG. FIG. 7 is a partially enlarged view of the panel 8 and the rib 84. 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 has a main body 81 that does not transmit light, and a rib 84 that transmits light and guides the light toward the display plate 7. In the present embodiment, the panel 8 has a main body 81 made of a dark material that does not transmit light, including, for example, black or gray, and a light-colored material that can transmit light, including, for example, white and translucent. It has a rib 84 formed of.

The term "non-transmissive" is not limited to those that do not completely transmit light. As long as the light is slightly transmitted, it does not give a sense of discomfort to the user of the electronic device 1 or affect the visibility of the display board 7, and does not impair the function of the display device 5. It shall be included in "not transparent".

The main body 81 is formed in a tubular shape. The main body 81 does not transmit light at least on the inner peripheral surface. The main body 81 shields light between the outside and the inside of the panel 8 and reflects the light on the inner peripheral surface of the main body 81. The main body 81 is arranged with a holding frame 82 that holds the outer edge of the base 91 of the lens 9. The main body 81 and the holding frame 82 are integrally formed.

The main body 81 has a lower wall 811, an upper wall 812 arranged to face the lower wall 811, a side wall 813 connecting the lower wall 811 and the upper wall 812, and a side wall 813 arranged to face the lower wall 811. It has a side wall 814 that connects to the upper wall 812. The lower wall 811, the upper wall 812, the side wall 813, and the side wall 814 are integrally formed. The lower wall 811 is formed with a recess 811a to which the lower wall (adhesive portion) 841 of the rib 84 engages. The upper wall 812 is formed with a recess 812a to which the upper wall (adhesive portion) 843 of the rib 84 engages.

The holding frame 82 is formed in a frame shape. The holding frame 82 projects from the inner peripheral surface of the main body 81. The holding frame 82 holds the outer edge of the base 91 of the lens 9 from the front side. The holding frame 82 positions the lens 9 in the front-rear direction in the panel 8.

The holding frame 82 is arranged and held facing the holding portion 821, the holding portion 822 arranged to face the holding portion 821, the holding portion 823 connecting the holding portion 821 and the holding portion 822, and the holding portion 823. It has a holding portion 824 that connects the portion 821 and the holding portion 822. The holding portion 821, the holding portion 822, the holding portion 823, and the holding portion 824 are integrally formed. The holding portion 821 is projected from the inner peripheral surface of the lower wall 811. The holding portion 822 is projected from the inner peripheral surface of the upper wall 812. The holding portion 823 projects from the inner peripheral surface of the side wall 813. The holding portion 824 projects from the inner peripheral surface of the side wall 814. The holding portion 821 is formed with a notch 821a with which the rib body 845 of the rib 84 is engaged, and is discontinuous in the left-right direction. The holding portion 821 is formed with a recess 821b on the back surface side to which the wall portion (adhesive portion) 842 of the rib 84 engages. The holding portion 822 is formed with a notch 822a with which the rib body 845 of the rib 84 is engaged, and is discontinuous in the left-right direction. The holding portion 822 is formed with a recess 822b on the back surface side to which the wall portion (adhesive portion) 844 of the rib 84 engages.

The rib 84 is bonded to the main body 81 in a surface shape. The panel 8 has ribs 84 that are spaced apart from each other in the left-right direction. The rib 84 regulates the bending of the panel 8 due to heat generation of the display panel 2 or an impact applied from the outside. The rib 84 connects the facing surfaces of the inner peripheral surfaces of the panel 8. The ribs 84 partition the openings of the holding frame 82. In this embodiment, four ribs 84 are arranged.

The rib 84 has a lower wall 841, an upper wall 843 arranged to face the lower wall 841, and a pillar-shaped rib body 845 that connects the lower wall 841 and the upper wall 843. The lower wall 841, the upper wall 843, and the rib body 845 are integrally formed. The lower wall 841 engages with the recess 811a of the lower wall 811 of the main body 81 and is surface-bonded to the lower wall 811. The wall portion 842 extending upward from the front end portion of the lower wall 841 engages with the recess 821b of the holding portion 821 of the holding frame 82 and is surface-bonded to the holding portion 821. The upper wall 843 engages with the recess 812a of the upper wall 812 of the main body 81 and is surface-bonded to the upper wall 812. The wall portion 844 extending downward from the front end portion of the upper wall 843 engages with the recess 822b of the holding portion 822 of the holding frame 82 and is surface-bonded to the holding portion 822.

As shown in FIG. 5, the plate thickness d11 on the front side of the rib body 845 of the lower wall 811 of the main body 81 is the sum of the plate thickness d12 on the rear side of the rib body 845 of the lower wall 811 and the plate thickness d13 of the lower wall 841. Is equal to. The plate thickness d21 on the front side of the rib body 845 of the upper wall 812 of the main body 81 is equal to the sum of the plate thickness d22 on the rear side of the rib body 845 of the upper wall 812 and the plate thickness d23 of the upper wall 843.

The panel 8 configured in this way is formed by, for example, two-color molding. More specifically, the main body 81 and the holding frame 82 are molded from the dark resin material using the first mold, and then the rib 84 is molded from the light resin material using the second mold. .. Alternatively, the rib 84 is molded from the light-colored resin material using the first mold, and then the main body 81 and the holding frame 82 are molded from the dark-colored resin material using the second mold. The rib 84 may be made of the same material as the lens 9.

<Lens>
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 has a base 91 and a plurality of convex portions 92 projecting from the base 91 to the front side. The lens 9 has a slide groove 94 formed between adjacent convex portions 92. The base portion 91 and the convex portion 92 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. 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 frame 82 and the rib body 845.

In the slide groove 94, the rib body 845 of the rib 84 can move forward and backward when the lens 9 is assembled to the panel 8. The slide groove 94 extends in the front-rear direction. In the assembled state, the rib body 845 is located in the slide groove 94. When assembling the lens 9, the lens 9 is assembled to the panel 8 from the rear side by sliding the lens 9 to the front side with the rib body 845 positioned in the slide groove 94.

<How to assemble electronic devices>
Next, the method and operation of assembling the electronic device 1 will be described.

The lens 9 is assembled from the rear side of the panel 8. With the rib body 845 of the panel 8 inserted into the slide groove 94 of the lens 9, the lens 9 is slid forward until the rear surface 845b of the rib body 845 abuts on the surface 91a of the base 91. The convex portion 92 is located in the window portion 83 surrounded by the holding frame 82 and the rib body 845. 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 of the convex portion 92 comes 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. The light emitted from the surface 91a of the base 91 of the lens 9 and the surface 92a of the convex portion 92 is emitted toward the display plate 7. On the surface 7a of the display plate 7, the portion of the convex portion 92 in contact with the surface 92a is brightened by the light emitted from the surface 92a of the convex portion 92. Further, on the surface 7a of the display plate 7, a portion facing the entrance of the slide groove 94 and located on the front side of the rib body 845 is emitted from the surface 91a of the base 91 and is brightened by the light transmitted through the rib body 845. Since the rib body 845 transmits light, uneven brightness of the display board 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 slide groove 94 on which the rib body 845 of the rib 84 protruding from the inner peripheral surface of the panel 8 can move forward and backward. Further, in this embodiment, the rib 84 has light transmission. As a result, according to the present embodiment, the portion of the surface 7a of the display plate 7 that is in contact with the surface 92a of the convex portion 92 can be brightened by the light emitted from the lens 9. Further, according to the present embodiment, the portion of the surface 7a of the display plate 7 that faces the entrance of the slide groove 94 and is located on the front side of the rib body 845 is emitted from the surface 91a of the base 91 to make the rib body 845. It can be brightened by the transmitted light. In this embodiment, since the rib body 845 transmits light, unevenness in the brightness of the display plate 7 can be reduced. In the present embodiment, it is possible to reduce the portion of the surface 7a of the display plate 7 where the light emitted from the lens 9 is blocked by the internal member of the panel 8. 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. 9 and 10. FIG. 9 is a perspective view of the conventional panel 8X. FIG. 10 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 rib 84X does not have light transmission. In the display device 5X, since the rib 84X blocks the light, the brightness of the display board 7 located on the front side of the rib 84X 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 84X and becomes darker than the surroundings.

In the present embodiment, when the rib body 845 and the lens 9 are made of the same material, the unevenness of the brightness of the display plate 7 can be further reduced.

In the present embodiment, the main body 81 of the panel 8 is a dark color that does not transmit light, and only the rib 84 is a light color that can transmit light. According to this embodiment, it is possible to suppress the generation of stray light inside the display device 5 and suppress the careless leakage of light to the outside.

In the present embodiment, since the main body 81 and the rib 84 are made of different materials, surface adhesion is used so that the adhesive force does not decrease. More specifically, in the present embodiment, the rib 84 has a lower wall 841, a wall portion 842, an upper wall 843, and a wall portion 844 as adhesive portions. According to this embodiment, the main body 81 and the rib 84 can be bonded in a plane shape. As described above, according to the present embodiment, the main body 81 and the rib 84 can be more reliably bonded to each other.

In the present embodiment, since the main body 81 and the rib 84 are adhered to each other in a planar shape, the portions of the rib 84 other than the rib main body 845 face each other and overlap with each other. According to the present embodiment, the main body 81 can regulate that the light guided from the portion of the rib 84 other than the rib main body 845 leaks in an unintended direction different from the direction of the lens 9. In this embodiment, the generation of stray light inside the display device 5 can be suppressed.

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.

FIG. 8 is a cross-sectional view of another example of the display device 5A according to the embodiment. In the above, the case where the lens 9 is assembled from the rear side of the panel 8 has been described, but as shown in FIG. 8, the lens 9A can also be applied to the case where the lens 9 is assembled from the front side of the panel 8. In this case, the slide groove 94A of the lens 9A is open toward the rear side.

In the above, the panel 8 is formed by two-color molding, but the present invention is not limited to this. After molding the entire panel 8 with a light-colored resin material, the main body 81 and the holding frame 82 other than the rib 84 may be colored in a dark color.

1 Electronic equipment 2 Display panel 3 Front panel 5 Display device 6 Board 61 Light source 7 Display board 71 Display unit 72 Transmission unit 8 Panel 81 Main unit 82 Holding frame 84 Rib 9 Lens 91 Base 92 Convex part 94 Slide groove

Claims (5)

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 a tubular body and ribs arranged so as to project from the inner peripheral surface of the body.
The lens has a slide groove formed so that the rib can move forward and backward when the lens is assembled to the panel.
The rib transmits the light emitted by the light source and guides the light toward the display plate.
Display device. The display device according to claim 1, wherein the rib has an adhesive portion that is surface-bonded to the inner peripheral surface of the main body. The body is a dark color that does not transmit light, including black or gray.
The display device according to claim 1 or 2, wherein the rib is a light color capable of transmitting light, including white or translucent. The display device according to any one of claims 1 to 3, wherein the rib is made of the same material as the lens. 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 4, which is adjacent to the front panel.
An electronic device characterized by being equipped with.

Images